Huawei ERAN12.1 - Workshop

May 10, 2018 | Author: Khurram Rafique | Category: Transmission Control Protocol, Data Transmission, Telecommunications Engineering, Networks, Electronics
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SRAN 11.1 eRAN12.1 Workshop Madrid- Mar 2017 Vodafone – Huawei SRAN12.1 Workshop HUAWEI TECHNOLOGIES CO., LTD. eRAN12.1 Agenda eRAN12.1 General Overview Deep Dive Selected Features HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2 Agenda 1 GENERAL OVERVIEW eRAN12.1 HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3 4.5G New Era 4.5G as MBB Foundation 4.5G Evolution goes for 5G Massive MIMO Giga 3D 3D Basic Beamforming Coordination Performa CA nce MBB Foundation Go Vertical CIoT LiTRA WTTx VoLTE CloudAIR Cloudif ication Video Cloud RAN Cloud Air 4 eRAN12.1 Address the challenges Go Giga Go Vertical Go Cloudification Evolution • 3D Beamforming • NB-IoT • Cloud Air 4.5G  Density area : capacity +100%  Massive Connections: 72K/cell  LTE flexible bandwidth • 3D Coordination  Module Battery Life: 10 Years  Intra-band: Cell Edge User THP +30%  Wide Coverage: GSM +20dB  Inter-band: DL Cell THP +20% • LiTRA  Inter-RAT: LAA  IOPS: reliable & smart PTT • • Foundation VoLTE as basic service WTTx/MBB one network • Massive MIMO  Coverage: L1800 = G900  Reserved resource for MBB MBB • CA everywhere  Quality: CD Level voice  IPRAN UL 2CC/DL 5CC  Reliability: No Drop • Basic performance  1588V2 ATR • HD video everywhere  Downlink throughput: ↑10%  Direct IPsec  Coverage: Video = Voice  Uplink throughput: ↑15% 5 eRAN12.1 Promotes 4.5G to be MBB Foundation MBB Network Massive VoLTE HD Video Massive CA WTTx High THP MIMO as basic enjoyed CA WBB/MBB as basic service everywhere everywhere one Network performance 6 4.5G Evolution, eRAN12.1 Goes for 5G 4.5G Evolution From 4.5G to 5G Go Giga Go Vertical Go Cloud CloudAIR Hotspot Cell Edge CIoT LiTRA 3D 3D Flexible PSM IOPS Coordination Beamforming Coordination Bandwidth 7 CA Evolution Intra-site Downlink CA Intra-site Uplink CA • DL 5CC CA • UL 2CC CA • Flexible CA Fast CA Everywhere CA Flexible CA • IPRAN DL 5CC • IPRAN UL 2CC CA • 1588V2 ATR and Direct X2 • IPRAN DL 3CC Inter-site IPRAN DL CA Inter-site IPRAN UL CA 8 VoLTE plus Ensure VoLTE as Basic Service VoLTE 1 Coverage 2 Quality 3 Reliability L1800 = G900 CD Music Level No Drop • VoLTE Coverage Enhancement • EVS Rate Control • VoLTE User Prior Access Based on Extended Delay Budget • SRI Code Channel Allocation • VoLTE Smartphone Compatibility • eTTIB Optimization • Uplink Call Mute Recovery • VoLTE Rate Control • UL Compensation Scheduling • TTI Bundling • VoLTE Handover Optimization • Robust Head Compression • Voice Characteristic Awareness • RLC Segmentation Enhancement Scheduling • VoLTE CoMP 9 Video Plus Enable HD Video Everywhere Video 1 Coverage 2 Initial Buffering 3 Speed Video = Voice “0” Waiting “0” Stalling • Video TTI Bundling • WTCP • Video Load Balance • Video ACK IPRAN CoMP • Video Service Rate Adaption • Video TCP Saving • UDC 10 Basic Throughput Improvement based on Big Data Downlink Cell Avg Uplink Cell Avg Uplink Cell Edge User +10% +15% +30% • eRAN12.1 Downlink • eRAN12.1 Uplink • Turbo Receiver Performance Improvement Performance Improvement 11 eRAN12.1 Main Feature Overview 4.5G as MBB foundation Field Solution Feature Description Benefits 4T4R eMIMO phase2 Improved 4x2 MIMO vs 2x2 MIMO THP gain to 50% Supporting IPRAN UL 2CC/5CC Extend the UL CA area to 90% CA 1588 V2 Advanced Time Recover Simplify time synchronization Gbps Direct IPsec Reduce time delay PAMC improves basic UL THP Improve uplink throughput by 15% Basic Precise MCS improves basic DL THP Improve downlink throughput by 10% Improvement Turbo Receiver Improve cell edge uplink throughput by 30% VoLTE Coverage Enhancement Based on Extend VoLTE coverage by 1~2dB Extended Delay Budget VoLTE Plus eTTIB Extend VoLTE coverage by 0.5dB Experience EVS Rate Control CD Level voice quality, MOS +0.5, Coverage +1dB 4.0 VoLTE prior Access Reduce VoLTE call setup time by 30% Uplink Coverage Improvement for Video Extend video coverage by 1~2dB Video Initial Acceleration Reduce the video initial buffering time by 5%~10% WBB Specified Policy Management Enable WBB & MBB source allocation separately Connection + WTTx WTTx Uplink Data Compression Improve DL THP by 5%~10%, UL THP by 30%~60% 12 eRAN12.1 Main Feature Overview 4.5G Evolution Field Solution Feature Description Benefits Massive MIMO 3D Beamforming DL user throughput gain improved by 50~100% Lite Uplink Interference Cancellation UL user throughput gain of cell edge users 5~20%. Uplink Coordinated Scheduling UL user perceived throughput improved by 5~30% Go Giga 3D Coordination NAICS DL user throughput gain of cell edge users 10%. With DPS and JT, edge user throughput increased Downlink CoMP 40% Multi-band Isomerism and fast carrier Improve cell downlink user THP by 20% selection Go Vertical LiTRA IOPS Improve the reliability of PTT System Support GL flexible bandwidth allocation, maximize Go Cloudification Cloud Air LTE Flexible Bandwidth spectrum utilization. 13 eRAN12.1 Agenda eRAN12.1 General Overview Deep Dive Selected Features HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Description PDCP PDCP Discard Timer eNodeB Reordering timer RLC RLC maximum segment number maxHARQ-Tx MAC Server cell Server cell TBS Optimization  eNB sets optimized PDCP, RLC, and HARQ parameters,  The eNodeB forecasts the data volume to be scheduled by VoLTE and selects the optimal MCS and RB combination  Target: To reduce the packet loss probability due to PDCP discard timer timeout and to improve the voice quality of users under weak coverage in the uplink HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 16 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget 1 QCI1 bearer setup or RRC reconfiguration message for UEs entering TTI Bundling RRC Connection Reconfiguration Complete SR VoLTE user 2 UL Grant 3 QCI1 bearer release or RRC reconfiguration message for UEs exiting TTI Bundling RRC Connection Reconfiguration Complete  When QCI1 is setup.  If UE is in the weak coverage areas, the feature takes effect.  According to the data size of the Buffer, the eNodeB will optimize the uplink TBS in each scheduling time to reduce the packets discarded by PDCP discard timer.  When QCI1 releases or UE is in the good coverage areas, the feature no longer takes effect. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 17 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Parameter Value When QCI 1 Bearers Are Set Up Value After QCI 1 Bearers Are Deleted PDCP-layer discard timer MAX(150ms, RlcPdcpParaGroup.DiscardTimer RlcPdcpParaGroup.DiscardTimer) Maximum transmission times of 8 CellUlschAlgo.UlHarqMaxTxNum HARQs in the uplink (in the non-TTI bundling state) Maximum transmission times of MAX(N24, CellUlschAlgo.TtiBundlingHarqMa HARQs in the uplink (in the TTI CellUlschAlgo.TtiBundlingHarqMaxTxNu xTxNum bundling state) m) eNodeB-specific timer for reordering at The values of these two parameters vary RlcPdcpParaGroup.ENodeBAmRe the receiver in AM for each bearer depending on the value of the orderingTimer UlHarqMaxTxNum parameter. For details, eNodeB-specific timer for reordering at see tables in next page RlcPdcpParaGroup.ENodeBUmRe the receiver in UM for each bearer orderingTimer HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 18 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Value of the eNodeB-specific timer for reordering at the receiver in AM/UM for each bearer in the non-TTI bundling state Maximum Number of Uplink HARQ Transmission Length of the eNodeB-specific Timer for Reordering Times at the Receiver in AM/UM for Each Bearer 8 60 ms Value of the eNodeB-specific timer for reordering at the receiver in AM/UM for each bearer in the TTI bundling state Maximum Number of Uplink HARQ Transmission Length of the eNodeB-specific Timer for Reordering Times at the Receiver in AM/UM for Each Bearer N24 80 ms N28 95 ms HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 19 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Feature Dependencies Prerequisite Features • Uplink RLC segmentation enhancement Mutually Exclusive Feature • None Impacted Features • LOFD-001048 TTI Bundling: It is recommended that VoLTE Coverage Enhancement Based on Extended Delay Budget be enabled with TTI Bundling so that the uplink coverage improves for users in the TTI bundling state. HW Dependencies • None HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 20 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Network Impact System Capacity If the uplink channel quality becomes poor, VoLTE services will consume more PDCCH CCEs and PRBs. With the increase in the number of VoLTE users, the traffic volume and throughput of data services may slightly decrease. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 21 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Network Impact Network performance The Uu-interface transmission delay for voice packets increases. The Uu-interface uplink packet loss rate of voice packets decreases by a maximum of 25% if the proportion of VoLTE users exceeds 5%, the proportion of uplink low-index MCSs on the PUSCH exceeds 20%, and users are evenly distributed. The uplink coverage of VoLTE users increases by 0.5 dB to 2.5 dB when no interference exists in the uplink and the downlink RSRP is less than -124 dBm. If the uplink channel quality becomes poor, VoLTE services may consume more RB resources. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 22 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget When to use Same type of scenarios as for TTI bundling  Sites with a great number of voice users  Weak coverage occurs in the uplink  High uplink packet loss rate  Cells with a high packet loss rate of VoLTE-service users at the cell edge  Cells with strong uplink interference VoLTE services are enabled in the uplink in weak coverage areas, such as rural, suburban, and indoor areas The uplink coverage is limited due to interference. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 23 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Parameters Parameters Description The UlVoipCrosslayerOptSwitch option specifies whether to enable the CellUlschAlgo.UlEnhencedVoipSchSw VoLTECoverage EnhancementBased on Extended Delay Budget feature. This parameter specifies whether to enable the uplink RLC segmentation enhancement function for VoLTE services on UEs not in the TTI bundling state and specifies the maximum number of uplink RLC segments. If this parameter is set to a non-zero value X, the uplink RLC segmentation CellUlschAlgo.UlVoipRlcMaxSegNum enhancement feature is enabled and a maximum of X RLC segments can be used for VoIP services in uplink dynamic scheduling when a UE exits the TTI bundling state. When the UlVoipCrosslayer-OptSwitch option is selected, set this parameter to 23. Otherwise, set this parameter to 20. This parameter specifies the maximum number of uplink RLC segments for UEs in CellUlschAlgo.TtiBundlingRlcMaxSegNum the TTI bundling state. When the UlVoipCrosslayer-OptSwitch option is selected, set this parameter to 5. Otherwise, set this parameter to 4. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 24 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Activation //Switching on the feature MOD CELLULSCHALGO:LOCALCELLID=0,ULENHENCEDVOIPSCHSW=UlVoipCrosslayerOptSwitch-1,UlVoip RlcMaxSegNum=23; Activation Observation Trace the RRC_CONN_RECFG message with QCI1 bearer on the Uu interface. Check in the RRC_CONN_RECFG message whether the:  drb-ToAddModList > pdcp-Config > discardTimer  mac-MainConfig > ul-SCH-Config > maxHARQ-Tx field is set to the value recommended by Deep Coverage Improvement for VoLTE. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 25 LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget Performance Monitoring Uplink average packet loss rate in a cell = L.Traffic.UL.PktLoss.Loss.QCI.1/L.Traffic.UL.PktLoss.Tot.QCI.1 Uplink average packet loss rate of CEUs in a cell = L.Traffic.UL.BorderUE.PktLoss.Loss.QCI.1/ L.Traffic.UL.BorderUE.PktLoss.Tot.QCI.1 The voice quality will improve: • L.Voice.VQI.UL.Excellent.Times(L.Voice.VQI.AMRWB.UL.Excellent.Times) • L.Voice.VQI.UL.Good.Times(L.Voice.VQI.AMRWB.UL.Good.Times) • L.Voice.VQI.UL.Accept.Times(L.Voice.VQI.AMRWB.UL.Accept.Times) • L.Voice.VQI.UL.Poor.Times(L.Voice.VQI.AMRWB.UL.Poor.Times) • L.Voice.VQI.UL.Bad.Times(L.Voice.VQI.AMRWB.UL.Bad.Times) The poor and the bad VQI ratio will be reduced for VoLTE users in poor coverage areas. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 26 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 27 LOFD-120205 Uplink Coverage Improvement for Video CEU performing video services Long initial buffering delay Video pause 3dB Bottleneck for Video on UL Coverage Speed Requirement for Video In UL weak coverage areas at cell edges, long initial video DL Speed(Mbps) UL Speed(Kbps) buffering delay and video 4M pauses occur due to limited 2M uplink power, causing significant 1M 156K deterioration in video 52K 78K experience. 480P 720P 1080P HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 28 LOFD-120205 Uplink Coverage Improvement for Video Video-Timestamp Saving Video-TTI Bundling Video-IPRAN UL CoMP ~62bytes X2 X2 MAC RLC PDCP IP TCP Payload Relaxed Backhaul TCP Timesta mp (IPRAN ,one way delay < 8ms) header 12Bytes Video TTI Bundling Timestamp is Optional Field, get 19.4% gain. ACK/NACK Packet The combination of coverage gain of video TTI Bundling, Inter-eNodeB UL CoMP for Video and TCP timestamp removal is around 0.5~2 dB or UE download rate improve 10%-50%. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 29 LOFD-120205 Uplink Coverage Improvement for Video Description: TTI Bundling Video Packet ACK/NACK Retransmission ACK/NACK RV-0 RV-2 RV-3 RV-1 OFF Redundancy size ON Normal HARQ RTT Redundancy HARQ RTT  With TTI bundling, the same data block of different HARQ redundancy versions is transmitted in four consecutive TTIs, and these TTIs are processed as one resource unit.  TTI Bundling can reduce retransmissions and the round trip time (RTT), and make full use of the gains generated by HARQ combination. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 30 LOFD-120205 Uplink Coverage Improvement for Video Description: UL COMP X2 X2 IP RAN One-way delay ≤ 10 ms Service cell Collaboration cell A B  This function supports UL CoMP for UEs performing video services based on SC with IPRAN. This function takes effect only for video service UEs whose uplink power resources are limited in their serving cells. The implement of this function is similar to that of LOFD-001066 Intra-eNodeB UL CoMP. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 31 LOFD-120205 Uplink Coverage Improvement for Video Description: Timestamp Removal Bit Bit Bit Bit Bit 0 8 16 24 31 Source port Destination port Sequence number Fixed 20-byte TCP Acknowledgment number header header TCP header Flag bit Window size length Checksum Urgent pointer Padding Timestamp  As defined in RFC1323, a TCP packet contains a 12-byte timestamp option.  During the TCP three-way handshake between UEs and the server, the eNodeB removes timestamps from uplink SYN packets and then sends the packets to the server, ensuring that no timestamps are contained in transmitted data packets.  TCP timestamp removal significantly reduces the size of TCP ACKs and increases TCP ACK transmission efficiency (19.4% for a TCP ACKs) for UEs whose uplink coverage is limited, increasing the download rate of video services. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 32 LOFD-120205 Uplink Coverage Improvement for Video Feature Dependencies Prerequisite Features • SC-based Service Identification: This function is required by the video TTI bundling and inter-eNodeB UL CoMP for video services to identify video services. • LOFD-001066 Intra-eNodeB UL CoMP & LOFD-070222 Intra-eNodeB UL CoMP Phase II Inter-eNodeB are required for UL CoMP for Video Mutually Exclusive Feature • None Impacted Features • LOFD-001048 TTI Bundling: If a UE enters the VoLTE TTI bundling state and then performs video services, it remains in the VoLTE TTI bundling state. Check criteria for video TTI bundling are applied only after the VoLTE services are released and the UE exits the TTI bundling state. And viceversa. • LOFD-110221 Initial Acceleration: After the LOFD-110221 Initial Acceleration feature is enabled, TCP packets do not contain timestamps. Therefore, TCP timestamp removal does not need to be enabled when the Initial Acceleration feature is enabled. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 33 LOFD-120205 Uplink Coverage Improvement for Video Network Impact Network performance TCP timestamp removal.  Increases the throughput of edge UEs performing video services.  The PDCP throughput on the entire network decreases slightly because a TCP packet header size decreases by 12 bytes. Video TTI bundling.  This function enhances uplink coverage and can increase MCS indexes in weak uplink coverage areas, reducing the packet loss rate and increasing throughput of edge Ues performing video services. Inter-eNodeB UL CoMP for video services  This function reduces the number of retransmissions and reduces the packet loss rate to increase throughput of edge UEs performing video services. Inter-eNodeB transmission bandwidth consumption increases slightly. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 34 LOFD-120205 Uplink Coverage Improvement for Video When to use It is recommended that this feature be activated when  the coverage is weak (for example, the percentage of uplink scheduling times with MCS 0 selected is greater than 10%),  network load is light (for example, the downlink PRB usage is less than 20%),  and video traffic at cell edges is high (for example, the traffic volume proportion of video services for UEs at the cell edge is greater than 5%). Video TTI Bundling and inter-eNodeB UL CoMP for video services are not recommended in the following scenarios:  High speed cells or ultra-high speed cells, to avoid increasing air interface signaling load  Cells with a bandwidth of 1.4 MHz, avoiding increasing PRB usage  Scenarios where uplink interference is small HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 35 LOFD-120205 Uplink Coverage Improvement for Video Dependencies Hardware Video service identification on the main control board is required for video TTI bundling and inter- eNodeB UL CoMP for video services. Therefore, a UMPTa, UMPTb, or UMPTe board must be configured. The baseband processing unit must be LBBPd, UBBPd, or UBBPe. The RX mode of LBBPd1 and LBBPd2 must be 2R and non-4R, respectively. When inter-eNodeB UL CoMP for video services is enabled, neither UBBPd3 nor UBBPd4 can be used in GL or UL mode. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 36 LOFD-120205 Uplink Coverage Improvement for Video Dependencies Other For Video TTI bundling UEs must support. For inter-eNodeB UL CoMP for video services,  the precision of time synchronization between BBUs must be within ±3 us,  the one-way transmission delay between BBUs must be less than or equal to 8 ms,  and no intermodulation interference or PCI conflict exists. For details about other requirements, see "Engineering Guidelines for LOFD-081219 Inter-eNodeB VoLTE CoMP" in UL CoMP Feature Parameter Description. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 37 LOFD-120205 Uplink Coverage Improvement for Video Parameters Parameters Description CellAlgoSwitch.TcpCtrlSwitch Select the TstpRemovalSwitch option to activate timestampt removal CellAlgoSwitch.UlSchSwitch Select the TtiBundlingForVideoSwitch option. CellTtiBundlingAlgo.SinrThdToTrigVideoTtib SINR Threshold To Trigger Video TTI Bundling CellAlgoSwitch.UplinkCompSwitch Select the UlCompForVideoSwitch option. CellUlCompAlgo.UlCompA3OffsetForRelaxedBH configure an A3 offset for relaxed-backhaul-based UL CoMP. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 38 LOFD-120205 Uplink Coverage Improvement for Video Activation //Enabling TCP timestamp removal MOD CELLALGOSWITCH:LocalCellId=0,TcpCtrlSwitch=TstpRemovalSwitch-1; //Enabling video TTI bundling MOD SCPOLICY:ScAlgoSwitch=SC_SERVICE_IDENTITY_SW-1; ADD SCAPPPARACFG: AppDnsId=0, AppIdentType=DNS, AppDns="*---sn-*.googlevideo.com", MatchRule=Query, AppName="Youtube video"; MOD CELLALGOSWITCH:LocalCellId=0,UlSchSwitch=TtiBundlingForVideoSwitch-1; //Enabling inter-eNodeB UL CoMP for video services MOD SCPOLICY:ScAlgoSwitch=SC_SERVICE_IDENTITY_SW-1; ADD SCAPPPARACFG: AppDnsId=0, AppIdentType=DNS, AppDns="*---sn-*.googlevideo.com", MatchRule=Query, AppName="Youtube video"; MOD CellAlgoSwitch:LocalCellId=0,UplinkCompSwitch=UlCompForVideoSwitch-1; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 39 LOFD-120205 Uplink Coverage Improvement for Video Activation Observation  TCP timestamp removal.  Compare the TCP packets captured for video services before and after this function is enabled. Check that timestamps do not exist in the TCP packets on ports 80, 8080, and 443.  Video TTI bundling.  Observe the value of the ttiBundling IE in ul-SCH-Config of mac-MainConfig in the RRC_CONN_RECFG message over the Uu interface  L.Traffic.User.TtiBundling.Avg: Average number of UEs on which TTI bundling takes effect in a cell  Inter-eNodeB UL CoMP for video services.  L.ChMeas.ULRelaxedBHCoMP.PRB.Avg: Average number of PRBs scheduled for relaxed-backhaul-based UL CoMP in a cell  L.ULCoMP.ULRelaxedBHCoMP.User.Avg: Average number of UEs selected for whom UL CoMP based on relaxed backhaul is performed in a cell HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 40 LOFD-120205 Uplink Coverage Improvement for Video Performance Monitoring After each function provided by this feature is enabled, the total PDCP-layer downlink throughput of video services for UEs far from the cell center increases.  The increase is indicated by the L.Exp.Video.Thrp.bits.DL.Far counter when the total throughput of video services is stable.  When the throughput is unstable (for example, the fluctuation margin of the L.Exp.Video.Thrp.bits.DL.All counter value is more than 5%), the increase can be estimated according to the result of L.Exp.Video.Thrp.bits.DL.Far divided by L.Exp.Video.Thrp.bits.DL.All. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 41 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 42 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Overview UL IC can mainly improve the performance of cell edge users Throughput UL IC can improve the performance of cell edge, meanwhile it has no negative impact on network KPI. UL IC can work based on Intra-site、Inter-site、Coordinated BBU and relaxed backhaul. UL IC is able to co-operate with MRC、IRC and CoMP receiver. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 43 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Benefits For the cell: For the UE: HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 44 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Description The procedure is started when UE1 reports the A3 measurement result to its serving cell in eNB1 UE1: Demodulation and Decoding Control Information of UE1 Optional: Data of UE1 1. Cell1 sends scheduling information of UE 0/1: Demodulation UE1 to cell0 and Decoding 2. Cell0 cancels UE1’s interference from Reconstruct Data of UE1 and interference UE 0 Cell UL receiving signal Cancelling 3. Cell0 retries User0 demodulation or UE 0: Demodulation eNB 0 eNB 1 decoding and Decoding again UE 1 The Procedure of Uplink IC HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 45 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Feature Dependencies Prerequisite Features • None Mutually Exclusive Feature • LOFD-001007 High Speed Mobility None • LOFD-001008 Ultra High Speed Mobility None • N/A Frequency Hopping None • N/A Multi-RRU Cell None HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 46 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Feature Dependencies Impacted Features • LOFD-120201 Turbo Receiver: When UL IC is enabled, the benefited UEs of Turbo Receiver can be only non-UL- IC benefited UEs. • LAOFD-080202 Carrier Aggregation for Uplink 2CC: If Carrier Aggregation for Uplink 2CC is enabled, an uplink CA UE cannot be selected as a UL IC interfering UE. • LOFD-081219 Inter-eNodeB VoLTE CoMP: If Inter-eNodeB VoLTE CoMP is enabled, an IP RAN CoMP UE cannot be selected as a UL IC benefited UE. • LOFD-001066 Intra-eNodeB UL CoMP: If Intra-eNodeB UL CoMP is enabled, a UL CoMP UE cannot be selected as a UL IC benefited UE when the eNodeB with four antennas receives signals. • LOFD-070222 Intra-eNodeB UL CoMP Phase II: If Intra-eNodeB UL CoMP Phase II is enabled, a UL CoMP UE cannot be selected as a UL IC benefited UE when the eNodeB with four antennas receives signals. • MLOFD-121280 eMTC Introduction: An eMTC UE cannot be selected as a UL IC benefited or interfering UE. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 47 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Network Impact Network performance This feature can  increase the modulation and coding scheme (MCS) index of UL IC benefited UEs,  decrease the uplink initial block error rate (IBLER),  and increase the uplink cell coverage. When this feature is enabled, the average uplink cell throughput and the average uplink CEU throughput increase significantly. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 48 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation When to use It is recommended that this feature be enabled in densely populated urban areas or urban areas where the inter-site distance is less than 1000m.  Recommended UL PRB>10%  If the traffic is heavy in such scenarios (for example, if the uplink or downlink PRB usage is greater than 90% or the CCE or CPU usage is greater than 80%), it is recommended that the relevant parameter settings be optimized.  It is recommended that this feature be disabled in suburban and rural areas where the inter-site distance is greater than 1000m. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 49 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Dependencies Hardware UBBPe Other For inter-Site IC:  Time synchronization with a deviation less than 3.0 μs must be achieved between BBUs  one-way transmission delay between BBUs be less than 4 ms. The eNodeB cannot eliminate intermodulation interference. Before enabling this feature, check whether intermodulation interference exists. When a physical cell identifier (PCI) conflict occurs between two cells, the two cells cannot be differentiated using the A3 event. Consequently, an incorrect coordinated cell may be selected. Therefore, before enabling this feature, check whether a PCI conflict exists HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 50 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Parameters Parameters Description Select the UlInterSiteIcSwitch option of this parameter for all cells where CellAlgoSwitch.UplinkIcSwitch this feature is to be enabled. CellUlIcAlgo.UlIcA3Offset UL IC A3 Offset Activation //Turning on the UL IC switch MOD CELLALGOSWITCH:LocalCellId=0,UplinkIcSwitch=UlInterSiteIcSwitch-1; //(Optional) Modifying the UL IC A3 offset MOD CELLULICALGO:LocalCellId=0,UlIcA3Offset=-20; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 51 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Activation Observation Run the DSP CELLULICCLUSTER command to query the cooperating candidate list of a cell. If the command output is not empty, UL IC has taken effect. On the U2000, you can check whether a UE is a UL IC UE by using the real-time user trace function. If a UE is a UL IC UE, this feature has taken effect If the value of the counter L.ULIC.User.Avg or L.ULIC.RB is not zero, this feature has taken effect. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 52 LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation Performance Monitoring UL IC Users  The gain of UL IC is directly proportional to the number of UL IC Ues L.ULIC.User.Avg UL IC RB  The proportion of UL IC RBs can be calculated in the formula L.ULIC.RB/L.ChMeas.PRB.PUSCH.Avg. A larger proportion of UL IC RBs results in more uplink throughput gains offered by UL IC. Uplink UE Throughput Uplink Cell Throughput HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 53 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 54 LBFD-121102 eRAN12.1 Introduction Package Initial CQI Adjustment Efficiency improvement for Flexible target IBLER adaptation Optimization adaptive DL HARQ Before After Near & CQI Far & CQI fluctucation fluctucation RBG RBG is low. is high. allocated allocated for us er for us er A’s retx B’s tx Lower target IBLER Higher target IBLER TBS_indexnew=TBS_indexold + IncreaseNumber • DL PRB usage > 30%; • Burst Traffic • CPU load < 55%; • DL PRB usage > 50%; • DL User Average Throughput Gain:1%~5%; • DL User Average Throughput Gain:1%~5%; • DL User Average Throughput Gain:1%~5%; • • IBLER maybe increase; MCS increase; • Hard to observe gain • IBLER increase; • Hard to observe gain HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 55 LBFD-121102 eRAN12.1 Introduction Package - PAMC Description: PAMC The fixed initial SinrOffset(-5) is too conservative in this case  For every new accessed user, a fixed initial SINR Adjustment is configured, which is more or less in many scenarios and deteriorates the performance of small packet service due to lack of enough data for SINR Adjustment convergence. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 56 LBFD-121102 eRAN12.1 Introduction Package - PAMC Suitable User Initializing Enhanced MCS Mapping  Clustering users into different groups for each cell.  Making full use of Receiver performance and HARQ  Based on the online users, we can get the statistic Combing Gain，we take the channel quality and characteristics (e.g. SINR Adjustment) through adaptive fluctuation and RB Number into consideration, an learning method, which can provide a better initial value for enhanced MCS mapping scheme is proposed new users HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 57 LBFD-121102 eRAN12.1 Introduction Package - PAMC Feature Dependencies Prerequisite Features • None Mutually Exclusive Feature • LBFD-00101502 Dynamic Scheduling: UL target IBLER adaptation in the Dynamic Scheduling feature and PAMC in the eRAN12.1 Introduction Package feature cannot be enabled simultaneously. Impacted Features • None HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 58 LBFD-121102 eRAN12.1 Introduction Package - PAMC Network Impact Network performance PAMC function causes UL IBLER to increase by 0%–40% It improves user-perceived UL throughput. Cell Average Throughput Gain User Average Perceived Throughput Gain 2~5% 5~15% HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 59 LBFD-121102 eRAN12.1 Introduction Package - PAMC Dependencies Hardware LBBPd\UBBPd\UBBPe Other PAMC does not apply to UEs with any of the following attributes:  TTI bundling, VoLTE, UL interference cancellation (IC), and push to talk (PTT). PAMC does not take effect in cells whose Cell.UlCyclicPrefix is set to EXTENDED_CP(Extended). HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 60 LBFD-121102 eRAN12.1 Introduction Package - PAMC Parameters Parameters Description CellAlgoSwitch.UlSchExtSwitch UlPAMCSwitch(UlPAMCSwitch) for PAMC activation When to use You are advised to select the UlPAMCSwitch option of this parameter if:  the average UL MCS index is less than 15:  and the MCSs with indexes smaller than 10 are selected on more than 10% occasions of UL scheduling. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 61 LBFD-121102 eRAN12.1 Introduction Package - PAMC Activation //Enabling the PAMC function MOD CELLALGOSWITCH:LocalCellId=0,UlSchExtSwitch=UlPAMCSwitch-1; Performance Monitoring KPI Formula Impact (L.ChMeas.PUSCH.MCS.0*0+L.ChMeas.PUSCH.MCS.1*1+…+L.ChMeas.PUSCH MCS .MCS.28*28)/sum(L.ChMeas.PUSCH.MCS.0...L.ChMeas.PUSCH.MCS.28) Increase ("L.Traffic.UL.SCH.QPSK.ErrTB.Ibler"+"L.Traffic.UL.SCH.16QAM.ErrTB.Ibler"+" IBLER L.Traffic.UL.SCH.64QAM.ErrTB.Ibler")/("L.Traffic.UL.SCH.QPSK.TB"+"L.Traffic.U Increase L.SCH.16QAM.TB"+"L.Traffic.UL.SCH.64QAM.TB")*"100“ "L.Thrp.bits.UL" / "L.Thrp.Time.Cell.UL.HighPrecision“ Cell throughput Increase ("L.Thrp.bits.UL" - "L.Thrp.bits.UE.UL.SmallPkt") / User throughput "L.Thrp.Time.UE.UL.RmvSmallPkt" Increase HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 62 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 63 LOFD-121214 VoLTE Coverage-based CSFB Description CN 2. The eNodeB determines whether the UE is in 3a. The CN sends an SIP 380/500/503 message to the calling an LTE weak-coverage area. If the UE is in an LTE UE. weak-coverage area, the eNodeB rejects to 3b. The CN sends a CS Paging Notification message to the establish the VoLTE call. called UE. 1. A UE originates a VoLTE call. LTE 4. The UE falls back to GERAN or UTRAN. GERAN/UTRAN For VoLTE UEs in LTE weak-coverage areas, VoLTE bearer setup is rejected and CSFB is triggered. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 64 LOFD-121214 VoLTE Coverage-based CSFB Description A UE is performing a VoLTE call. • SRVCC refers to single radio voice call continuity. The UE moves. • aSRVCC refers to SRVCC in alerting phase. SRVCC handover threshold • bSRVCC refers to SRVCC before alerting. • eSRVCC refers to enhanced SRVCC. eSRVCC is triggered. When a UE initiates a VoLTE call in an LTE weak-coverage area: • Initiating the call may fail due to the large probability of packet loss A UE initiates a VoLTE call. and retransmissions of VoLTE SIP signaling messages. LTE weak- aSRVCC/bSRVCC is triggered. coverage area • SRVCC may be triggered if the VoLTE call is successfully initiated. − If a UE is in the alerting status, aSRVCC is triggered. If the UE does not support aSRVCC, call drop occurs. Call failure: The UE does not support − If a UE has not entered the alerting status, bSRVCC is triggered. aSRVCC/bSRVCC when initiating a call. If the UE does not support bSRVCC, call drop occurs. Data-service handover threshold/Idle-mode reselection threshold HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 65 LOFD-121214 VoLTE Coverage-based CSFB The eNodeB determines that the UE is in a weak- coverage area if the following conditions are met:  PathLoss > CellHoParaCfg.UlPoorCoverPathLossThd  SINR < CellHoParaCfg.UlPoorCoverSinrThd The VoLTE Coverage-based CSFB feature can be enabled or disabled for specified UE types by configuring a whitelist and a blacklist HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 66 LOFD-121214 VoLTE Coverage-based CSFB Feature Dependencies Prerequisite Features • LOFD-001033 CS Fallback to UTRAN • LOFD-001034 CS Fallback to GERAN The VoLTE Coverage-based CSFB feature requires either of these features • LBFD-081103 Terminal Awareness Differentiation: The UE whitelist and blacklist function requires Terminal Awareness Differentiation. Mutually Exclusive Feature • None Impacted Features • None HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 67 LOFD-121214 VoLTE Coverage-based CSFB Network Impact Network performance UEs initiating VoLTE calls in weak-coverage areas fall back to the CS domain to process voice services. This prevents call drops caused by bSRVCC and aSRVCC when the UE or core network does not support bSRVCC and aSRVCC, thereby reducing the call drop rate and improving voice user experience. QCI 1 bearer setup requests from weak-coverage areas are rejected, decreasing the QCI 1 bearer setup success rate. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 68 LOFD-121214 VoLTE Coverage-based CSFB When to use It is recommended that this feature be activated in the same scenarios as TTI bundling:  The number of voice users exceeds a threshold (5%)  Weak coverage occurs in the uplink  The proportion of uplink path loss greater than 135 dBm exceeds a threshold (5%)  The coverage is weak (for example, the percentage of uplink scheduling times with MCS 0 selected is greater than 10%),  The uplink voice packet loss rate exceeds a threshold (0.2%)  CSFB successful rate>99% Not recommended:  High speed cells or ultra-high speed cells  Cells with a bandwidth of 1.4 MHz, avoiding increasing PRB usage HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 69 LOFD-121214 VoLTE Coverage-based CSFB Dependencies The VoLTE Coverage-based CSFB feature requires the cooperation between Huawei eNodeB and IMS.  UEs must be able to perform CSFB after receiving an SIP 500/380/503 message. Necessary Support from IMS and EPC • IMS: After receiving the message for rejecting the setup of the VoLTE-service bearer, the IMS sends an SIP 380/500/503 to calling UE and sends invite message to MSC for called call . • EPC: After receiving the invite message MSC send a CS Paging Notification message to the called UE. • Reference TS 23.237 v14.1.0 /TS 23.228 v14.1.0 /TS24.229 v14.2.0 HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 70 LOFD-121214 VoLTE Coverage-based CSFB Parameters Parameters Description CellHoParaCfg.FlashSrvccSwitch This parameter specifies whether to enable VoLTE Coverage-based CSFB. This parameter specifies the path loss threshold for uplink weak-coverage CellHoParaCfg.UlPoorCoverPathLossThd identification in VoLTE Coverage-based CSFB. This parameter specifies the SINR threshold for uplink weak-coverage CellHoParaCfg.UlPoorCoverSinrThd identification in VoLTE Coverage-based CSFB. The FLASH_SRVCC_SWITCH_ON( Flash SRVCC Switch On) option specifies UeCompat.WhiteLstCtrlSwitch whether to enable VoLTE Coveragebased CSFB for UEs in the whitelist. The FLASH_SRVCC_SWITCH_OFF(FLASH_SRVCC_SWITCH_OFF) option UeCompat.BlkLstCtrlSwitch specifies whether to disable VoLTE Coverage-based CSFB for UEs in the blacklist. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 71 LOFD-121214 VoLTE Coverage-based CSFB Activation //Activating feature MOD CELLHOPARACFG: LocalCellId=0, FlashSrvccSwitch=ON, UlPoorCoverPathLossThd=125, UlPoorCoverSinrThd=0; //Configuring Black-White list MOD UECOMPAT: Index=1, UeInfoType=IMEISV_TAC, ImeisvTac=2,BlkLstCtrlSwitch=FLASH_SRVCC_SWITCH_OFF-1, WhiteLstCtrlSwitch=FLASH_SRVCC_SWITCH_ON-0; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 72 LOFD-121214 VoLTE Coverage-based CSFB Activation Observation Message for requesting QCI 1 bearer setup Message for rejecting to set up the QCI 1 bearer due to unavailable radio resources Message for triggering a CSFB for the UE Counter Description L.E-RAB.FailEst.PoolCover.VoIP Number of setup failures of E-RABs for VoLTE services due to weak coverage HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 73 LOFD-121214 VoLTE Coverage-based CSFB Performance Monitoring Voice QoS and Voice Quality KPIs COUNTER FORMULA L.E-RAB.AbnormRel.QCI.1 / (L.E-RAB.AbnormRel.QCI.1+L.E- VoLTE call drop rate RAB.NormRel.QCI.1+L.IRATHO.SRVCC.E2W.ExecSuccOut + L.IRATHO.SRVCC.E2G.ExecSuccOut- L.IRATHO.SRVCC.E2W.MMEAbnormRsp-L.IRATHO.SRVCC.E2G.MMEAbnormRsp Additionally you can also monitor whether VoLTE experience has been improved by this feature by viewing following counters. The counter values decrease after the VoLTE Coverage-based CSFB feature is enabled. Counter Description L.IRATHO.SRVCC.E2G.PrepAttOut Number of inter-RAT handover attempts from EUTRAN to GERAN for SRVCC Number of inter-RAT handover attempts from EUTRAN to WCDMA network for L.IRATHO.SRVCC.E2W.PrepAttOut SRVCC HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 74 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 75 LOFD-120201 Turbo Receiver This feature improves the PUSCH demodulation performance Compared with a common linear receiver, the turbo receiver is characterized by iterative channel estimation and iterative equalization.  The iteration process improves channel estimation quality and reduces inter-symbol interference In the scenarios of weak interference in the uplink, no other IC method is employed to effectively improve the uplink reception quality. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 76 LOFD-120201 Turbo Receiver Benefits Benefits offered to UEs This feature takes effect for UEs whose instantaneous modulation and coding scheme (MCS) indexes are smaller than 9. The uplink throughput of a UE increases by about 3% to 25% if the following conditions are met:  The UE is in a weak coverage area.  The average MCS index is smaller than or equal to 5.  The average number of scheduled resource blocks (RBs) is smaller than or equal to 25. Benefits offered to cells  The average uplink throughput in weak coverage areas increases by about 3% to 20%. This feature cannot offer obvious gains or any gains if either of the following conditions is met:  Propagation conditions are good, or the limitation is in the downlink HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 77 LOFD-120201 Turbo Receiver Feature Dependencies Prerequisite Features • None Mutually Exclusive Feature • Uplink intrasubframe frequency hopping Impacted Features • LOFD-081219 Inter-eNodeB VoLTE CoMP & LOFD-120202 Intra-eNodeB and Inter-eNodeB Uplink Interference Cancellation: When one of these features and the turbo receiver are enabled simultaneously, the feature is chosen preferentially and therefore and fewer UEs can benefit from the turbo receiver. • LOFD-001066 Intra-eNodeB UL CoMP & LOFD-070222 Intra-eNodeB UL CoMP Phase II & LOFD-070223 UL CoMP based on Coordinated eNodeB: When one of these features and the turbo receiver are enabled simultaneously, UEs can benefit from the two features but the gains offered by the turbo receiver are lowered. • LOFD-001048 TTI Bundling The turbo receiver and TTI bundling can be both enabled in the same cell. However, they cannot take effect simultaneously for a UE. TTI bundling takes precedence HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 78 LOFD-120201 Turbo Receiver Network Impact System Capacity This feature increases the uplink throughput of UEs in weak coverage areas. Network Performance This feature improves the PUSCH demodulation performance, reduces the number of service drops, access failures, and handover failures caused by PUSCH demodulation failures, and improves service quality for UEs in weak coverage areas. If quadrature phase shift keying (QPSK) is used in the uplink, there may be some decrease in the initial block error rate (IBLER), residual block error rate (RBLER), and proportion of Ues for which small MCS indexes are selected. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 79 LOFD-120201 Turbo Receiver When to use This feature is applicable when there are many UEs in weak coverage areas. Therefore, this feature is recommended in a cell where UEs with MCS indexes ranging from 0 to 5 account for over 20% of UEs in the cell. Cells with regions of weak uplink coverage, such as inside buildings Cells with large inter-site distance Cells with large interference, especially for cases with interference from non-LTE system Dependencies Hardware UBBPe HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 80 LOFD-120201 Turbo Receiver Parameters Parameters Description CellAlgoSwitch.TurboReceiverSwitch Turbo Receiver Switch Activation //Turning on the turbo receiver switch MOD CELLALGOSWITCH:LocalCellId=0,TurboReceiverSwitch=ON; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 81 LOFD-120201 Turbo Receiver Activation Observation HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 82 LOFD-120201 Turbo Receiver Performance Monitoring Uplink Cell Throughput in Different Path-Loss Areas  After this feature is activated, the uplink throughout will increase in high-path-loss areas (for example, areas indicated by PL10 to PL14) (>24h observation) Uplink cell throughput in the path-loss area indicated by PLn =(L.Thrp.bits.UE.UL.PLn - L.Thrp.bits.UE.UL.SmallPkt.PLn) /L.Thrp.Time.UE.UL.RmvSmallPkt.PLn Uplink MCS Distribution  After this feature is activated, there will be a decrease in the number of times smaller MCS indexes are selected during scheduling and there will be an increase in the number of times larger MCS indexes (>24h observation) L.ChMeas.PUSCH.MCS.0 to L.ChMeas.PUSCH.MCS.28 Uplink BLERs in QPSK Mode After this feature is activated, the uplink IBLER or RBLER in QPSK mode may decrease Uplink IBLER in QPSK mode = L.Traffic.UL.SCH.QPSK.ErrTB.Ibler / L.Traffic.UL.SCH.QPSK.TB Uplink RBLER in QPSK mode = L.Traffic.UL.SCH.QPSK.ErrTB.Rbler / L.Traffic.UL.SCH.QPSK.TB HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 83 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 84 LOFD-121212 eNodeB Supporting 1588v2 ATR Clock synchronization solutions supported by RAN devices: Synchronization Type Clock Source Synchronization Mode NE NodeB, eNodeB, BTS, and micro base Synchronous Ethernet (SyncE) Frequency synchronization stations Frequency synchronization and time NodeB, eNodeB, BTS, and micro base 1588v2 synchronization stations 1588v2 ATR Time synchronization NodeB, eNodeB, and BTS NodeB, eNodeB, BTS, and micro base ITU-T G.8265.1 Frequency synchronization stations Network synchronization Private IP clock Frequency synchronization NodeB, eNodeB, and BTS Line clock Frequency synchronization NodeB, eNodeB, BTS, BSC, and RNC ITU-T G.8275.1 Time synchronization eNodeB, BTS, and micro base stations ITU-T G.8275.2 Time synchronization eNodeB, BTS, and micro base stations 1588+SynE backup Time synchronization eNodeB Building integrated timing supply Frequency synchronization NodeB, eNodeB, BTS, BSC, and RNC (BITS) 8 KHz Frequency synchronization RNC and BSC TOD+1PPS Time synchronization eNodeB Absolute clock synchronization GLONASS Time synchronization eNodeB BeiDou Time synchronization LTE TDD Time synchronization and frequency NodeB, eNodeB, BTS, BSC, RNC, and GPS synchronization micro base stations SyncE+Air interface soft Time synchronization eNodeB, BTS, and micro base stations synchronization Air interface synchronization and Inter-site Sniffer Time synchronization LTE TDD micro base stations other synchronization solutions Frequency synchronization and time Peer clock NodeB, eNodeB, and BTS synchronization Cloud BB internal clock Time synchronization NodeB and eNodeB HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 85 LOFD-121212 eNodeB Supporting 1588v2 ATR Clock Synchronization Process Between Master and Slave Ends Master Slave ΔT › The transmission delay between the master and slave ends is (Time offset) measured using the timestamps carried in the Sync and Delay_req messages. t1 Sync message Timestamps t2 = t1 + delay1 + offset Delay 1 t4 = t3 + delay2 - offset t2 t1, t2 › If Delay1= Delay2, then t3 t1, t2, t3 Delay1 = Delay2 = [(t2 - t1) + (t4 - t3)]/2 Delay 2 › If the transmission delay is obtained, the time offset between the t4 master and slave ends is calculated as follows: Delay_Req message Offset = [(t2 - t1) – (t4 - t3)]/2 Delay_Resp message › After compensating for the offset, the slave end synchronizes with the master end. t1, t2, t3, t4 1. Theoretical basis for IEEE 1588v2-based synchronization principles: strict symmetry between uplink and downlink for a loopback path HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 86 LOFD-121212 eNodeB Supporting 1588v2 ATR Description: 1588v2 Port status Port status Passive External Phase trail path at the at the port status synchronization master end slave end interface Ethernet GPS OC 1PPS+TOD RRU BC BC BC OC (GM) BC E1 eNodeB BC BC RRU BC E2 BC BC OC (GM) eNodeB OC A B C Time Difference Device  As shown in the preceding figure, the base station synchronizes only with the Introduced A Base station ≤ ±150 ns directly connected IEEE 1588v2 BC. Transmissio  The total time difference is less than ±1.5 us. The figure on the left lists the time B ≤ ±1000 ns n network difference introduced at each hop (A, B, and C). C Clock server ≤ ±100 ns  If the time difference at each hop meets the requirements, the IEEE 1588v2- based time synchronization solution can be adopted. All the transmission devices between the clock server (OC GM) and the base station must support IEEE 1588v2 BC. A transmission device supporting IEEE 1588v2 can meet the time difference requirement (±1.5 us) in the table. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 87 LOFD-121212 eNodeB Supporting 1588v2 ATR Description: 1588v2 ATR IEEE 1588v2 adaptive time Base station IEEE 1588v2 recovery (ATR) networking master end Bearer network Base station ATR Both the clock server and base station must support IEEE 1588v2 but the transmission devices between them do not have to. Application Scenario and Key Factors  Application scenario: ATR can only be used to perform time synchronization for LTE FDD in the current version.  Key factors affecting synchronization accuracy: network packet delay variation (PDV), traffic load and packet size, intermediate transmission device type, or number of transmission device hops HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 88 LOFD-121212 eNodeB Supporting 1588v2 ATR PDV (Packet delay variation)  A PS network is characterized by PDV noise floor and its minimum delay is fixed.  A1 indicates the time precision (1.5 us) required for ATR. Collect numerous delay values within a fixed period and filter out the PDV by finding the minimum delay value. The value of A1 determines the time precision required for synchronization.  If the value of A1 varies greatly, the status and precision for time synchronization cannot be ensured. A1 A2 Number of packets * Depending on the algorithm 0 Delay time Minimum packet Packet delay variation delay  IEEE 1588v2 ATR first collects a large amount of delay data in a fixed period, then calculates the minimum delay to filter out the PDV, and finally calculates the synchronization offset. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 89 LOFD-121212 eNodeB Supporting 1588v2 ATR Factors Affecting PDV PDV is key to the precision of IEEE 1588v2 ATR. The ratio of PDV noise floor delay less than 1.5 us must exceed 10% within 100s to meet the synchronization precision requirement. The key factors are as follows: • Transmission device type • Number of transmission devices between the IP clock and the base station • Duration of background traffic exceeding 80% should be less than 100s. Recommended Devices and Hops Transmission equipments & Hops suggested <=4 hops switch; <=2 Hops Router; <=3 Hops MicroWave; <=3 Hops mix of Switch&RT&MW; Not support DSL/PON and MSTP etc. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 90 LOFD-121212 eNodeB Supporting 1588v2 ATR Dependencies Hardware Only the UMPT, LMPT, or UTRPc board can be used. Activation //Configure the Clock Mode as “MANUAL” in the eNB SET CLKMODE: MODE=MANUAL, CLKSRC=IPCLK, SYNMODE=OFF; //Configure the Clock Synchronization Mode as “TIME” SET CLKSYNCMODE: CLKSYNCMODE=TIME; //Configure the IP Clock Link as “PTP” and the protocol profile as “G.8275.2” ADD IPCLKLINK: LN=0, ICPT=PTP, CNM=UNICAST, IPMODE=IPV4, CIP="1.1.1.1", SIP="2.2.2.2", DELAYTYPE=E2E, PROFILETYPE=G.8275.2; //Configure the ATR Switch as “ON” SET IPCLKALGO: ATRSW=ON; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 91 LOFD-121212 eNodeB Supporting 1588v2 ATR Activation Monitoring Run the DSP IPCLKALGO command to check whether the ATR switch has been turned on. Run the DSP CLKSTAT command to check the clock status. If the clock is locked, its status is normal. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 92 LOFD-121212 eNodeB Supporting 1588v2 ATR Activation Monitoring PDV measurement: In the navigation tree, choose Monitor > Common Monitoring. Double-click IP Clock Data Collection Monitoring Clock Quality test: In the navigation tree, choose Monitor > Common Monitoring. Double-click Clock Quality Test Monitoring. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 93 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 94 LOFD-121213 Direct IPsec  Concepts  In IPsec networking, a direct IPsec tunnel is established over the X2 interface between two eNodeBs, without the need of deploying a SeGW. IPsec tunnel with SeGW Direct IPsec tunnel X2 flows in IPsec tunnel with SeGW eNodeB X2 flows in Direct IPsec Router Switch Router Router IP network eNodeB Router IP network Router Router EPC SeGW Router eNodeB Switch Router  Background  Traditional X2 interfaces mainly carry handover-related traffic and neighboring cell measurement messages, which feature small bandwidth and low requirements for transmission delay.  IP RAN inter-site coordination-based services, such as CA, CoMP, and CSPC, occur, requiring large bandwidth and low transmission delay. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 95 LOFD-121213 Direct IPsec SRAN12.1 X2/eX2 Changes eX2 Self-Management Feature Parameter Description “In non-ideal backhaul mode, coordination services are carried over an X2 interface if the GlobalProcSwitch.ItfTypeForNonIdealModeServ parameter is set to X2. If this parameter is set to eX2, coordination services are carried over an eX2 interface in non-ideal backhaul mode.” Plan to move all eX2 functionalities to X2. eX2 will be discontinnued in the future. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 96 LOFD-121213 Direct IPsec X2_CP： For X2AP signaling like X2 interface setup signal, the delay less than 20ms. X2_UP： For CA/CSPC/UL CoMP services’ data, The delay must less than 8ms in SRAN12.1. mode1 : Only UP is in direct IPSEC mode2: both UP and CP are in direct IPSEC X2-UP’s direct IPSEC X2-UP and X2-CP’s direct IPSEC eNB1 eNB1 SecG GW SecG GW W W X2-CP’s IPSEC(can sharing with S1) eNB2 eNB2 X2_UP: • eNB can auto configure the direct IPSEC X2_UP & X2_CP: X2_CP: • eNB can auto configured the direct IPSEC •IPSEC should be manually configured, it can sharing with S1. Benefits & Drawback: •X2_UP and X2_CP’s IPSEC are both auto configured . Benefits & Drawback: •IPSEC specification requirement is higher. •Saving almost half of the IPSEC specification •The IPSEC specification can’t meet the specification •X2_CP ‘s IPSEC should be configured. requirement. •The IPSEC specification can meet the specification requirement It is recommended to mode1, because X2_CP in direct IPSEC isn’t necessary. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 97 LOFD-121213 Direct IPsec Specifications Board X2 interfaces eX2 interfaces Direct IPSEC X2 Direct IPSEC eX2 LMPT 96 32 48 None UMPTa/UMPTb 256 96 264 None UMPte 384 96 392 None It is recommended that Direct IPsec be used only on the X2 user plane because the X2 control plane has low requirements on delay and requires small bandwidth and the IPsec specifications cannot meet the need. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 98 LOFD-121213 Direct IPsec Feature Dependencies • LOFD-003009 IPSec • LOFD-002004 Self Configuration Network Impact Network Performance Compared with IPsec tunnels to the SeGW, X2 interfaces with direct IPsec tunnels effectively reduce transmission path alternations of X2 interfaces, decrease the X2 interface latency, and reduce the bandwidth consumption of the transport network. System Capacity The CPU usage increases by at most 5% due to the increase in the number of IPsec tunnels, compared with when SeGWs are deployed to establish IPsec tunnels. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 99 LOFD-121213 Direct IPsec Parameters Parameters Description UP: the security peer IP address acts as the IP address for the IKE peer of the X2-U interface. Direct IPSec tunnel is set up for the user plane, and an IPSec tunnel must be set up between the X2-U interface and SeGW by manually configuring all IPSec-related MOs. GlobalProcSwitch.X2SonSecMode CP_UP: the security peer IP address acts as the IP address for the IKE peer of the X2-C and X2-U interfaces. Direct IPSec tunnels are automatically set up for the control and user planes, and direct IPSec is deployed for X2-C and X2-U interfaces, with the SECURITYHOST MOs being the same. SECURITYTEMPLATE.SEGWSWITCH DISABLE SECURITYHOST.SEGWSWITCH DISABLE DISABLE for UP SCTPHOST.SIGIP1SECSWITCH ENABLE for CP_UP USERPLANEHOST.IPSECSWITCH ENABLE GlobalProcSwitch.ItfTypeForNonIdealModeServ Service Coord Interface in Non-ideal TX mode: “X2” or “eX2” HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 100 LOFD-121213 Direct IPsec Activation 1.Turn on the switch GlobalProcSwitch.X2SonSetupSwitch 2. Configure the parameter GlobalProcSwitch.X2SonSecMode to UP 3. Transmission should use End-Point: When ADD USERPLANEHOST, the parameter USERPLANEHOST.IPSECSWITCH should be configured to ENABLE In addition, Direct IPSec has no effect to S1, through it can share Userplane.host. “When direct IPSec is deployed for the user plane of the X2 interface, the S1 interface can share USERPLANEHOST with this X2 interface” HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 101 LOFD-121213 Direct IPsec Activation Observation 1. Select the eNodeB to be observed. 2. Run the DSP IPSECSA command. If the value of Destination IP in the command output is the IP address of the peer eNodeB instead of the SeGW, Direct IPsec is used. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 102 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 103 LOFD-002015 RACH Optimization (Enh.) Contention-based random access: Random access preambles are generated by UEs, and conflicts may exist among these preambles. The eNodeB uses a contention resolution mechanism to handle such conflicts. Non-contention-based random access: Random access preambles are allocated by the eNodeB, and each preamble is dedicated to only one UE. Therefore, there is no preamble conflict. Contention-based Non-contention-based HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 104 LOFD-002015 RACH Optimization (Enh.) Description: Detection of Contention-based Random Access Beyond Cell Radius UE t detect preambleID=2 in eNB detect UE cannot detect eNB detect Msg2 ,and UE send msg3 preambleID=1 Msg2，RA failed preambleID=1 Blue area ：cell coverage area (set by RF ) Before Yellow area ：cell radius area (set by parameter ) Now HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 105 LOFD-002015 RACH Optimization (Enh.) Description: Detection of Contention-based Random Access Beyond Cell Radius The detection procedure is as follows: 1. An eNodeB receives a random preamble that is a retransmission preamble, and detects the preamble index of N but not the preamble index of N+1. 2. The eNodeB delivers two RAR messages, which carry preamble indexes N and N+1, respectively, to a UE. 3. The eNodeB receives an RRC connection establishment request from the UE. 4. If the RAR message for this request carries the preamble index of N+1, the eNodeB determines that the UE is beyond the cell radius. 5. The eNodeB stops the random access procedure and measures the access-related performance counters. This function is controlled by the ExceedRadiusRaDetectionSw check box under the CellAlgoSwitch.RachAlgoSwitch parameter HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 106 LOFD-002015 RACH Optimization (Enh.) Description: Detection of Contention-based Random Access Beyond Cell Radius UE t detect preambleID=2 in eNB detect UE cannot detect eNB detect Msg2 ,and UE send msg3 preambleID=1 Msg2, RA failed preambleID=1 Blue area ：cell coverage erea (set by RF ) Before Yellow area ：cell radius area (set by parameter ) Now HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 107 LOFD-002015 RACH Optimization (Enh.) Description: Optimization of non-contention-based random access beyond cell radius During the optimized procedure, if an eNodeB receives a dedicated random preamble that is a retransmission preamble, and the following conditions are met:  The eNodeB detects that the index of the preamble is N but not N+1.  The eNodeB allocates preamble N+1 to a UE but not preamble N. Then the eNodeB delivers the RAR message that carries the preamble index of N+1 to the UE. This function is controlled by the NonContRaOptSwitch check box under the CellAlgoSwitch.RachAlgoSwitch parameter. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 108 LOFD-002015 RACH Optimization (Enh.) Feature Dependencies Prerequisite Features • None Mutually Exclusive Feature • None Impacted Features • LOFD-003029 SFN • LOFD-001007 High Speed Mobility • LOFD-001008 Ultra High Speed Mobility These functions are mutually exclusive with the detection of contention-based random access beyond cell radius and the optimization of non-contention based random access beyond cell radius. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 109 LOFD-002015 RACH Optimization (Enh.) Network Impact System capacity Detection of contention-based random access beyond cell radius  This function increases the overheads of PDSCH, PUSCH, and PDCCH resources and slightly decreases the uplink and downlink data rates. Network Performance Detection of contention-based random access beyond cell radius  This function increases the number of times that preamble messages are received in a cell and decreases the random access success rate. Optimization of non-contention-based random access beyond cell radius  This function increases the non-contention-based random access success rate. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 110 LOFD-002015 RACH Optimization (Enh.) When to use Detection of Contention-based Random Access Beyond Cell Radius  It is recommended that this function be enabled during off-peak hours when the contention- based random access success rate in a cell is lower than expected so that the number of random access failures of UEs beyond the cell radius can be measured.  This function is supported only by low-speed cells but not by SFN cells or high-speed cells. Optimization of Non-Contention-based Random Access Beyond Cell Radius:  It is recommended that this function be enabled when the non-contention-based random access success rate in a cell is lower than expected.  This function is supported only by low-speed cells but not by SFN cells or high-speed cells.  Overlap scenario with non-contention-based load<90% HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 111 LOFD-002015 RACH Optimization (Enh.) Dependencies Hardware Not supported by the LBBPc board. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 112 LOFD-002015 RACH Optimization (Enh.) Parameters Detection of Contention-based Random Access Beyond Cell Radius Parameters Description CellAlgoSwitch.RachAlgoSwitch Select the ExceedRadiusRaDetectionSw check box under this parameter. Optimization of Non-Contention-based Random Access Beyond Cell Radius Parameters Description CellAlgoSwitch.RachAlgoSwitch Select the NonContRaOptSwitch check box under this parameter. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 113 LOFD-002015 RACH Optimization (Enh.) Activation //Activating detection of contention-based random access beyond cell radius MOD CELLALGOSWITCH:LocalCellId=0,RachAlgoSwitch= ExceedRadiusRaDetectionSw-1; //Activating optimization of non-contention-based random access beyond cell radius MOD CELLALGOSWITCH:LocalCellId=0,RachAlgoSwitch= NonContRaOptSwitch-1; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 114 LOFD-002015 RACH Optimization (Enh.) Activation Observation HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 115 LOFD-002015 RACH Optimization (Enh.) Performance Monitoring Function Description Counter Detection of contentionbased Number of contentionbased exceeding- Random access beyond L.RA.ExceedRadiusContention.Access.Num cellradius Accesses cell radius Optimization of non- Noncontentionbased random access success contentionbased random L.RA.Dedicate.Msg3Rcv/L.RA.Dedicate.Att rate access beyond cell radius HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 116 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 117 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) eRAN8.1 eRAN11.1 eRAN12.1  DL 2CC (one-way delay≤4ms)  DL 3CC (one-way delay≤8ms)  DL 5CC (one-way delay≤8ms)  UL 2CC (new, one-way delay≤4ms) UL CA across eNB One-way delay shall be smaller than 4ms eX2 eNodeB 1 eNodeB 2 HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 118 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Description  PCell and SCell, located at different BBU, can work simultaneously for a UE’s uplink transmission.  The data aggregation happens on PCell.  Data transmission between BBU is via.eX2 interface (Huawei private). PCell and SCell’s data is aggregated SCell transfer at PCell and sent data to PCell for SGW to upper layer. S1 aggregation. eX2 PCell SCell Carrier Management Inter-eNodeB UL CA and intra-eNodeB UL CA has the same mechanism on the following aspects:  SCell config/deconfig based on measurement/blind, SCell activation and deactivation, Traffic-based SCell configuration and activation, Relation with TTI Bundling HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 119 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Feature Dependencies Prerequisite Features • LAOFD-001001 LTE-A Introduction: • (Optional) LAOFD-001002 Carrier Aggregation for Downlink 2CC in 40MHz: This feature is required if the largest total bandwidth of two carriers among all CCs is greater than 20 MHz but not greater than 40 MHz. • (Optional) LAOFD-080207 Carrier Aggregation for Downlink 3CC in 40MHz: This feature is required if the largest total bandwidth of three carriers among all CCs does not exceed 40 MHz. • (Optional) LAOFD-080208 Carrier Aggregation for Downlink 3CC in 60MHz: This feature is required if the largest total bandwidth of three carriers among all CCs is greater than 40 MHz but not greater than 60 MHz. • (Optional) LEOFD-110303 Carrier Aggregation for Downlink 4CC and 5CC This feature is required if four or five CCs are involved. • (Optional) LAOFD-080202 Carrier Aggregation for Uplink 2CC: This feature is required if inter-eNodeB uplink CA is to be used. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 120 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Mutually Exclusive Features Impacted Features HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 121 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Dependencies Hardware Cells on LBBPc boards cannot act as PCells in this feature or as SCells in inter-eNodeB uplink CA. Cells served by BTS3202Es or BTS3203Es cannot act as PCells in this feature or as SCells in inter- eNodeB uplink CA. If the LMPT is used as the main control board, at most seven inter-eNodeB BBPs can be interconnected because the transport resource group bandwidth of the LMPT is limited. If the total bandwidth of five aggregated carriers is 100 MHz, use UBBP and UMPT boards to process the data transmitted in PCells. If LBBPd or LMPT boards are used, the peak data rate may not reach the expected value, due to the lower hardware capabilities. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 122 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Dependencies Other This inter-eNodeB CA feature requires that a GPS or IEEE1588 V2 clock source be deployed with a time synchronization accuracy within 3 μs. It also requires that the jitter and packet loss rate meet the requirements Transmission delay  DL 5CC one-way delay≤8ms  UL 2CC one-way delay≤4ms HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 123 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Parameters Parameters Description The RelaxedBackhaulCaSwitch option of this parameter specifies whether to enable CA between cells served by macro eNodeBs, LampSite eNodeBs, or ENodeBAlgoSwitch.CaAlgoSwitch macro and LampSite eNodeBs on a network with relaxed backhaul requirements. Relaxed Backhaul Ca Max Component Carrier Number. Set this parameter to CaMgtCfg.RelaxedBackhaulCaMaxCcNum 2CC(2CC), 3CC(3CC), 4CC(4CC), or 5CC(5CC) as required. Relaxed Backhaul CA UL Max CC Num. Set this parameter to 2CC(2CC) or CaMgtCfg.RelaxedBHCaUlMaxCcNum 0CC(0CC) as required. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 124 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Activation MOD ENODEBALGOSWITCH:CAALGOSWITCH=RelaxedBackhaulCaSwitch-1; //UL Inter-site CA activation MOD CAMGTCFG:LocalCellId=0,CellCaAlgoSwitch=CaUl2CCSwitch-1,RelaxedBHCaUlMaxCcNum=2CC; //Turn on switch of UL CA (cell level) MOD CAMGTCFG: LOCALCELLID=0, CaUl2CCSwitch-1; // UL Inter-site CA activation MOD CAMGTCFG:LocalCellId=0,CellCaAlgoSwitch=CaDl3CCSwitch-1,RelaxedBackhaulCaMaxCcNum=5CC; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 125 LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul (Enh.) Activation Observation Counter Description Average number of CA UEs in the uplink relaxed-backhaul-based L.Traffic.User.PCell.UL.RelaxedBackhaulCA.Avg intereNodeB CA state that treat the local cell as their Pcell Average number of CA UEs that treat the local cell as their SCell in the L.Traffic.User.SCell.UL.RelaxedBackhaulCA.Avg uplink relaxed-backhaul-based inter-eNodeB CA state Average number of CA UEs in the uplink relaxed-backhaul-based L.Traffic.User.RelaxedBackhaulCA.SCell.Active.UL.Avg intereNodeB CA state that treat the local cell as their SCell and have the Scell Activated HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 126 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 127 LEOFD-121202 EVS Rate Control Fully Utilize Hearing Ability By EVS Enable FHD Voice With EVS CD Music Level MOS Hearing Ability 4.5G 4G 2/3G 4.5 EVS AMR-WB AMR-NB EVS 20 Hz 4 50 Hz 50 Hz 300 Hz AMR-WB 9.6kbps 24.4kbps 3400 Hz 12.65kbps 23.85kbps 7K Hz Code Rate * 3GPP EVS Characterization Test Result: Mixed / Music, P.800 DCR test methodology 20K Hz 20K Hz *EVS: Enhanced Voice Service (3GPP R12 Voice Codec) Samsung S7 Sharp Zeta Sony Xperia Snapdragon 820 HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 128 LEOFD-121202 EVS Rate Control High EVS Codec High EVS Codec High EVS Codec Low EVS Codec VoLTE User VoLTE User VoLTE User under poor coverage like indoor  When VoLTE user is in weak coverage areas, the QoS is not satisfied because of the high code rate.  The purpose of EVS Rate Control is to improve uplink coverage and voice quality by adjusting the code rate for VoLTE users supporting multiple EVS codec. For example, use higher code rate under cell center, and use lower code rate under cell edge. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 129 LEOFD-121202 EVS Rate Control Description  Voice rate adjustment is controlled by the CellAlgoSwitch.UlAmrcMode Initial: EVS-SWB 13.2K 1 UE in the Center 2 EVS Rate Adjust Determination RTP: CMR = 24.4K 3 New :EVS-SWB 24.4K 4 Rates available: 24.4k, 13.2k, 9.6k HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 130 LEOFD-121202 EVS Rate Control Description  The coding rate increases if the following conditions are both met:  The TBS of the UE is greater than TbsUpTh.  The UL packet loss rate for services with a QCI of 1 is less than VoiceAmrControl.PlrThdForIncreasingAmr for two consecutive times.  The coding rate will be decreased if the following conditions are both met:  The TBS of the UE is less than TbsDownTh.  The uplink packet loss rate for services with a QCI of 1 is greater than VoiceAmrControl.PlrThdForDecreasingAmrless for two consecutive times. TbsUpTh and TbsDownTh are automatically calculated based on VoiceAmrControl.RsnThdForIncreasingAmr and VoiceAmrControl.RsnThdForDecreasingAmr respectively. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 131 LEOFD-121202 EVS Rate Control Feature Dependencies Prerequisite Features • LOFD-111207 VoLTE Rate Control: The uplink adaptive AMR/EVS rate adjustment function provided by the EVS Rate Control feature requires VoLTE Rate Control. • LBFD-081103 Terminal Awareness Differentiation: The UE whitelist and blacklist function provided by EVS Rate Control requires Terminal Awareness Differentiation. Mutually Exclusive Feature • LOFD-001008 Ultra High Speed Mobility: In an ultra-high-speed cell where the channel conditions change rapidly, enabling the Voice Rate Control feature causes frequent rate adjustments, reducing voice quality • LOFD-001007 High Speed Mobility In a high-speed cell where the channel conditions change rapidly, enabling the Voice Rate Control feature causes frequent rate adjustments, reducing voice quality. Impacted Features • None HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 132 LEOFD-121202 EVS Rate Control Network Impact Network performance When the uplink channel quality is favorable, using a high EVS coding rate increases the MOS by 0.2 to 0.5. When the uplink channel quality is unfavorable, using a low voice coding rate decreases the uplink packet loss rate by 0% to 20% and improves uplink voice coverage by 0.5 dB to 1 dB. The impact on the throughput, data rate, and transmission delay varies depending on scenarios:  If the voice coding rate of a majority of voice services is increased, more PDCCH CCE and PRB resources will be consumed, which may slightly reduce the throughput and data rate of data services, and increase the transmission delay.  If the voice coding rate of a majority of voice services is reduced, less PDCCH CCE and PRB resources will be consumed, which may slightly increase the throughput and data rate of data services, and reduce the transmission delay. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 133 LEOFD-121202 EVS Rate Control When to use Same type of scenarios as for TTI bundling  Sites with a great number of voice users  Weak coverage occurs in the uplink  High uplink packet loss rate  Cells with a high packet loss rate of VoLTE-service users at the cell edge  Cells with strong uplink interference VoLTE services are enabled in the uplink in weak coverage areas, such as rural, suburban, and indoor deep coverage areas HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 134 LEOFD-121202 EVS Rate Control Dependencies EVS rate control does not take effect in the following scenarios: • UEs doesn’t support VoLTE and EVS codec. • EPC doesn’t support IMS-based voice services. • The voice coding format is not EVS-SWB. • RTP packets are encrypted. • The number of rates in both the rate set supported by UEs, and the configured rate set is less than or equal to 1. • If another network node is performing rate adjustment, the CellUlSchAlgo.RateCtrlCmrProcessStrategy parameter controls whether this feature takes effect as follows: o The value BASIC_STRATEGY indicates that the eNodeB does not perform rate adjustment. o The value ADAPTIVE_STRATEGY indicates that the eNodeB can perform rate adjustment only when the target rate provided by the eNodeB is lower than that provided by the other node. • The UE does not respond to the rate adjustment request, and therefore the rate adjustment fails. • if the IMS encrypts signaling messages, rate adjustment will fail. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 135 LEOFD-121202 EVS Rate Control Parameters Parameters Description This parameter specifies the parameter group ID used for voice AMR control. A parameter group for voice AMR VoiceAmrCtrlParaGroupId control consists of one high coding mode and one low AMR coding mode. HighAmrCodingMode This parameter specifies the high coding mode in the group specified by VoiceAmrControl.AmrGroupId. LowAmrCodingMode This parameter specifies the low coding mode in the group specified by VoiceAmrControl.AmrGroupId. If the uplink QCI 1 packet loss rate is greater than the threshold and the TBS meets the rate reduction conditions, rate PlrThdForDecreasingAmr reduction is triggered. If the uplink QCI 1 packet loss rate is less than the threshold and the TBS meets the rate increase conditions, the rate PlrThdForIncreasingAmr is increased (Def 2). RsnThdForDecreasingAmr This parameter is used to calculate the TBS threshold for reducing the uplink data rate of voice services (Def 14). RsnThdForIncreasingAmr This parameter is used to calculate the TBS threshold for increasing the uplink data rate of voice services (Def 5). BlkLstCtrlSwitch Disable VoLTE Rate Control for blacklisted Ues (UL_EVSC_SWITCH_OFF) WhiteLstCtrlSwitch Enable VoLTE Rate Control for whitelisted Ues (UL_EVSC_SWITCH_ON) Indicates whether the local end performs rate adjustment when the eNodeB detects that other NEsperform rate adjustment. When this parameter is set to BASIC_STRATEGY, the local end does not perform rate adjustment when RateCtrlCmrProcessStrat the eNodeB detects that other NEs perform rate adjustment. When this parameter is set to ADAPTIVE_STRATEGY, the egy local end performs rate adjustment when the eNodeB detects that other Nes perform rate adjustment. However, the HUAWEI TECHNOLOGIES CO.,target LTD. adjusted rate must be lower Huawei thanConfidential Pageof136 or equal to the expected adjusted rate other NEs. LEOFD-121202 EVS Rate Control Parameters Parameters Description ULAMRC_OFF: indicates that VoLTE Rate Control is disabled. ULAMRC_ENB_CONTROL: indicates that the eNodeB adjusts the uplink AMR-NB/AMRWB rate for voice services. ULAMRC_SBC_CONTROL: indicates that the eNodeB requests the SBC of the CN to adjust the uplink AMR- UlAmrcMode NB/AMR-WB rate for voice services. ULEVSC_ENB_CONTROL: specifies whether the eNodeB adjusts the uplink EVSSWB rate for VoLTE services. ADAPTIVE_ENB_CONTROL: specifies whether the eNodeB adjusts the uplink AMRNB/ AMR-WB/EVS-SWB rate for VoLTE services. If the option is selected, the adjusted coding rate can exceed the initial coding rate of this call. UlAmrcExceedingInitialSw If the option is deselected, the adjusted coding rate cannot exceed the initial coding rate of this call. It is recommended that this option be deselected when PDCCH resources are limited If the option is selected, the voice rate cannot be adjusted before the rate set required by a session is UlAmrCheckSw obtained. If the option is deselected, the voice rate can be adjusted before the rate set required by a session is obtained. It is recommended that this option be selected. If the option is selected, counters related to the distribution of voice coding modes are measured. VoiceCodingModeMeasSw If the option is deselected, counters related to the distribution of voice coding modes are not measured. Select this option when you need to monitor the changes in the distribution of voice coding modes. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 137 LEOFD-121202 EVS Rate Control Activation //Activating Voice AMR control and configuring groups MOD CELLALGOSWITCH: LocalCellId=0,UlAmrcMode=ADAPTIVE_ENB_CONTROL,AmrcAlgoSwitch=UlAmrcExceedingInitia lSw-1&UlAmrCheckSw-1&VoiceCodingModeMeasSw-1&UlEvsExceedingInitialSw-1; […] ADD VOICEAMRCONTROL: LocalCellId=0,VoiceAmrCtrlParaGroupId=4,HighAmrCodingMode=EVS_SWB_24_4kbps, LowAmrCodingMode=EVS_SWB_13_2kbps, PlrThdForDecreasingAmr=6, PlrThdForIncreasingAmr=2, RsnThdForDecreasingAmr=14, RsnThdForIncreasingAmr=5; ADD VOICEAMRCONTROL: LocalCellId=0,VoiceAmrCtrlParaGroupId=5,HighAmrCodingMode= EVS_SWB_13_2kbps, LowAmrCodingMode=EVS_SWB_9_6kbps, PlrThdForDecreasingAmr=16, PlrThdForIncreasingAmr=2, RsnThdForDecreasingAmr=14, RsnThdForIncreasingAmr=5; ADD UECOMPAT: Index=1, UeInfoType=IMEISV_TAC, ImeisvTac=2, BlkLstCtrlSwitch=UL_AMRC_SWITCH_OFF- 1&UL_EVSC_SWITCH_OFF-1, WhiteLstCtrlSwitch=UL_AMRC_SWITCH_ON-0&UL_EVSC_SWITCH_ON-0; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 138 LEOFD-121202 EVS Rate Control Activation Observation EVS Rate Control is enabled if the values of any of the following counters is not 0: HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 139 LEOFD-121202 EVS Rate Control Performance Monitoring  Packet Loss Rate Counters for QCI1.  Voice Quality Counters (L.Voice.VQI…)  Number of Times the Uplink Speech Coding Rate Changes  Speech Coding Scheme Distribution HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 140 LEOFD-121202 EVS Rate Control Terminal Dependancy  Huawei terminal:  2017H1，P10/P10 PLUS to be confirmed.  2017H2，Flagship product (MATE) to be confirmed.  The EVS default format is Header-Full Format（with CMR）which can support EVS rate control.  Samsung terminal:  The korean version of Samsung S7 can support EVS, but the EVS default format is Compact Format (no CMR), which can not supporte EVS rate control. Whether to support other formats is unclear.  Apple terminal:  Commercial plan is unclear. EVS Format： Compact Format（no CMR）; Huawei can provide MOP in order to confirm the Header-Full Format（no CMR）; Header-Full Format（with CMR）; capability of the phone can support EVS rate control HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 141 Agenda eRAN12.1 LTE Selected features LOFD-120204 VoLTE Coverage Enhancement Based on Extended Delay Budget New 2.1 LOFD-120205 Uplink Coverage Improvement for Video New LOFD-120202 Intra-eNodeB & Inter-eNodeB Uplink Interference Cancellation New LBFD-121102 eRAN12.1 Introduction Package New LOFD-121214 VoLTE Coverage-based CSFB New LOFD-120201 Turbo Receiver New LOFD-121212 eNodeB Supporting 1588v2 ATR New LOFD-121213 Direct IPsec New LOFD-002015 RACH Optimization Enh. LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul Enh. LEOFD-121202 EVS Rate Control New LEOFD-110301 DL 256QAM Enh. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 142 LEOFD-110301 DL 256QAM (Enh.) Description  3GPP Release 12 introduces DL 256 Quadrature Amplitude Modulation (QAM), which is a high- order modulation scheme.  As a supplement to the existing modulation schemes (QPSK, 16QAM, and 64QAM), 256QAM is used to improve UE transmission rates when radio conditions are good.  DL 256QAM allows the modulation of eight bits per symbol, supporting a large transport block size (TBS). In theory, DL 256QAM improves peak spectral efficiency by 33% compared with 64QAM. Benefits  DL 256QAM improves downlink spectral efficiency (by up to 30%) and throughput mainly for users near the cell center.  The feature benefits vary with radio channel quality, RF error vector magnitude (EVM), and UE EVM. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 143 LEOFD-110301 DL 256QAM (Enh.) Feature Dependencies Prerequisite Features • None Mutually Exclusive Feature • None Impacted Features • LEOFD-111305 Virtual 4T4R The DL 256QAM accessory algorithm must be disabled if the Virtual4T4RSwitch(Virtual4T4RSwitch) option of the CellAlgoSwitch.EmimoSwitch parameter is selected. 64QAM 256QAM HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 144 LEOFD-110301 DL 256QAM (Enh.) Dependencies The eNodeB model must be 3900 series, BTS3911E, BTS3912E or DBS3900 LampSite. The baseband processing unit must not be LBBPc. If LBBPd boards are used, note that:  Because 256QAM needs more resources. So if user number raise and include 256QAM user, the non- 256QAM users data throughput will decrease a little in LBBPd. There is no impact if cell users load is low or no 256QAM users in cell.  The specification of downlink peak throughput of the cell allocated in LBBPd is 300Mbps. This means in 20MHz bandwidth with 4x4 MIMO cells allocated in LBBPd, user peak throughput is up to 300Mbps. Even 256QAM is activated (theoretical peak throughput 390Mbps), it is limited by hardware specification.  The DL 256QAM accessory algorithm is not supported.  The eNodeB must be equipped with RF modules for which V3, V6, or KUNLUN is displayed in the Description field of the DSP BRDMFRINFO command output, for example, RRU3952 and RRU3959  In addition, to enable the DL 256QAM accessory algorithm, each RF module must be configured to work for LTE FDD only, with a single carrier, and at its rated power.  UEs must be of categories 11 to 14, comply with 3GPP Release 12, and support the DL 256QAM modulation scheme. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 145 LEOFD-110301 DL 256QAM (Enh.) Parameters The following table describes the parameter that must be set in the CellAlgoSwitch MO. The following table describes the parameters that must be set in the CellDlschAlgo MO. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 146 LEOFD-110301 DL 256QAM (Enh.) Activation 1. Run the MOD CELLALGOSWITCH command with the Dl256QamSwitch option selected under the DL 256QAM Algorithm Switch parameter. 2. Run the MOD CELLDLSCHALGO command to set DL 256QAM CQI Table Configure Strategy. 3. (Optional) If DL 256QAM CQI Table Configure Strategy is set to ADAPTIVE_CONFIG, run the MOD CELLDLSCHALGO command to set the DL 256QAM CQI Table Adaptive Period parameter. MML Command Examples //Activating DL 256QAMMOD CELLALGOSWITCH: LOCALCELLID=0, DL256QAMALGOSWITCH=Dl256QamSwitch-1; //Setting the table configuration strategy to adaptive configurationMOD CELLDLSCHALGO: LOCALCELLID=0, DL256QAMCQITBLCFGSTRATEGY=ADAPTIVE_CONFIG; //Setting the table adaptive period to 10sMOD CELLDLSCHALGO: LOCALCELLID=0, DL256QAMCQITBLADPPERIOD=10; HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 147 LEOFD-110301 DL 256QAM (Enh.) Counters HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 148 LEOFD-110301 DL 256QAM (Enh.) Performance Monitoring HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 149 Thank You THANK YOU www.huawei.com Copyright©2013 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only, and is subject to change or withdrawal according to specific customer requirements and conditions. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 150
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