WCDMA HSDPA RRM.ppt

March 24, 2018 | Author: Achraf Talei | Category: High Speed Packet Access, Scheduling (Computing), Networks, Telecommunications, Data Transmission
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www.huawei.com Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. HSDPA RRM and Parameters ISSUE 1.0 Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page1 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page2 HSDPA Channel Mapping  Interactive, Background and Streaming service could be mapped onto HS-DSCH  The bit rate thresholds are used  RAB with maximum bit rate higher than or equal to the threshold will be mapped onto HS-DSCH  The bit rate thresholds (DL streaming threshold on HSDPA , DL BE traffic threshold on HSDPA) are OM configurable  One switch (PS_STREAMING_ON_HSDPA_SWITCH) is available for operator to disable the mapping of streaming service onto HS-DSCH Interactive Background Streaming mapping RB on DCH RB on HS-DSCH RB on FACH Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page3 HSDPA Channel Mapping Parameters Parameter Name PS_STREAMING_ON_HSDPA_SWITCH Parameter ID PS_STREAMING_ON_HSDPA_SWITCH GUI Range 0, 1 Physical Range & Unit Not checked, checked Default Value 0 Optional/Mandatory Mandatory MML Command SET CORRMALGOSWITCH Description: When it is checked, the PS streaming service can be mapped onto HS-DSCH when the downlink max bit rate is more than or equal to DL streaming threshold on HSDPA. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page4 HSDPA Channel Mapping Parameters Parameter Name DL streaming threshold on HSDPA Parameter ID DlStrThsonHsdpa GUI Range D8, D16, D32, D64, D128, D144, D256 Physical Range & Unit 8, 16, 32, 64, 128, 144, 256 (kbit/s) Default Value D64 Optional/Mandatory Mandatory MML Command SET FRC Description: The rate decision threshold of the DL PS streaming service to be carried on HS- DSCH. When the maximum DL service rate is greater than or equal to this threshold, the service will be carried on HS-DSCH; otherwise, on DCH. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page5 HSDPA Channel Mapping Parameters Parameter Name DL BE traffic threshold on HSDPA Parameter ID DlBeTraffThsOnHsdpa GUI Range D8, D16, D32, D64, D128, D144, D256, D384, D768, D1024, D1536, D2048 Physical Range & Unit 8, 16, 32, 64, 128, 144, 256, 384, 768, 1024, 1536, 2048 (kbit/s) Default Value D8 Optional/Mandatory Mandatory MML Command SET FRC Description: The rate decision threshold of the DL PS background or interactive service to be carried on HS-DSCH. When the maximum DL service rate is greater than or equal to this threshold, the service will be carried on HS-DSCH; otherwise, on DCH. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page6 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page7 HSDPA Code Resource Allocation  The codes of the HS-PDSCH physical channel can be allocated in three ways:  Static HSDPA code allocation  RNC-controlled dynamic allocation  NodeB-controlled dynamic allocation Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page8 HSDPA Code Resource Allocation  Static HSDPA Code Allocation  Static HS-PDSCH code allocation  Spreading factor =16  Allocate continuously  Static HS-SCCH code allocation  Spreading factor =128  Allocate with common channel Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page9 HSDPA Code Resource Allocation  RNC-controlled dynamic allocation  In the RNC-controlled dynamic allocation, the RNC adjusts the reserved HS- PDSCH codes according to the real-time usage status of the codes  Configure the maximum and minimum numbers of codes available for HS- PDSCH on the RNC LMT. The codes between the two parameters are called shared codes  The RNC periodically monitors how the code resource is used and decides to extend or reduce the codes reserved for the HS-PDSCH Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page10 HSDPA Code Resource Allocation  When allocating the code resource triggered by radio link setup or radio link deletion, the RNC will extend the codes reserved for the HS- PDSCH if the following cases are fulfilled:  If in cell's code tree there is at least one code can be reserved and this code's SF is equal to or less than the Cell SF reserved threshold, NodeB will try to increase HS-PDSCH code number  Among shared codes, the code which neighbors to the reserved codes for the HS-PDSCH is idle, which can be attained by reshuffling the cell code resource * the solid dots represent the occupied codes and the circles represent the idle codes Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page11 HSDPA Code Resource Allocation  Reducing the Codes Reserved for HS-PDSCH  When allocating the code resources triggered by radio link setup, the RNC will reallocate one of the shared codes reserved for HS-PDSCH to DPCH if the minimum SF among free codes is larger than the Cell SF reserved threshold.  The code number of the reallocated code should be the minimum. * the solid dots represent the occupied codes and the circles represent the idle codes Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page12 Code Allocation Parameters Parameter Name Code Number for HS-SCCH Parameter ID HSSCCHCODENUM GUI Range 1–15 Physical Range & Unit 1–15 Unit: code Default Value 4 Optional/Mandatory Mandatory MML Command ADD CELLHSDPA Description: This parameter sets the number of HS-SCCH codes available in a cell. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page13 Code Allocation Parameters Parameter Name Allocate Code Mode Parameter ID ALLOCCODEMODE GUI Range Manual, Automatic. Physical Range & Unit Static Allocation, RNC-Controlled Dynamic Allocation. Default Value RNC-Controlled Dynamic Allocation Optional/Mandatory Mandatory MML Command ADD CELLHSDPA Description: This parameter is used to choose the mode of allocating HS-PDSCH codes in the RNC. There are two modes: static and dynamic Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page14 Code Allocation Parameters Parameter Name Code Number for HS-PDSCH Parameter ID HSPDSCHCODENUM GUI Range 1–15 Physical Range & Unit 1–15 Unit: code Default Value 5 Optional/Mandatory Mandatory MML Command ADD CELLHSDPA Description: This parameter sets the number of HS-PDSCH codes available in a cell. This parameter is valid only when Allocate Code Mode is set to Manual Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page15 Code Allocation Parameters Parameter Name Code Max Number for HS-PDSCH Parameter ID HSPDSCHMAXCODENUM GUI Range 1–15 Physical Range & Unit 1–15 Unit: code Default Value 10 Optional/Mandatory Mandatory MML Command ADD CELLHSDPA Description: This parameter sets the maximum number of HS-PDSCH codes available in a cell This parameter is valid only when Allocate Code Mode is set to Automatic Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page16 Code Allocation Parameters Parameter Name Code Min Number for HS-PDSCH Parameter ID HSPDSCHMAXCODENUM GUI Range 1–15 Physical Range & Unit 1–15 Unit: code Default Value 5 Optional/Mandatory Mandatory MML Command ADD CELLHSDPA Description: This parameter sets the maximum number of HS-PDSCH codes available in a cell This parameter is valid only when Allocate Code Mode is set to Automatic Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page17 HSDPA Code Resource Allocation  NodeB-controlled dynamic allocation  NodeB-controlled dynamic allocation allows the NodeB to use the HS- PDSCH codes that are statically allocated by the RNC. Besides, the NodeB can dynamically allocate the idle codes of the current cell to the HS-PDSCH channel  The NodeB periodically detects the SF16 codes apart from the RNC- allocated HS-PDSCH codes every 2 ms. If the codes or sub-codes are allocated by the RNC to the DCH or common channels, they are identified as occupied. Otherwise, they are identified as unoccupied. Therefore, the HS-PDSCH codes available for the HS-PDSCH channel include the codes allocated by the RNC and those consecutive and unoccupied SF16 codes Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page18 HSDPA Code Resource Allocation  NodeB-controlled dynamic allocation  For example, if the RNC allocates five codes to the NodeB, that is, No.11 to 15 SF16 codes are allocated to the HS-PDSCH. Suppose in a 2 ms TTI, No. 0 to 5 SF16 codes are allocated to the DCH and common channels. No. 0 to 5 SF16 codes are occupied. Therefore, in the current TTI, the HS-PDSCH can use No. 6 to 15 SF16 codes  If the DCH codes allocated by the RNC are temporarily occupied by the HS-PDSCH during the setup of radio links, the NBAP message returned to the RNC indicates that the radio link is set up successfully. From the next 2 ms TTI, the HS-PDSCH no longer uses these codes until they are released from the DCH Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page19 Code Allocation Parameters Parameter Name Dynamic codes allocation switch Parameter ID DYNCODESW GUI Range OPEN, CLOSE Physical Range & Unit OPEN, CLOSE Default Value OPEN Optional/Mandatory Mandatory MML Command SET MACHSPARA Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page20 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page21 HSDPA Power Allocation  HS-PDSCH and HS-SCCH shared power with R99 channels  DPCHs have the preferential right to occupy the power  NodeB can use all the remaining power for HSDPA  A configurable margin is used to keep the system in stable status Time Allowed power for HSDPA Total Power DPCH Power for CCH Higher power utility efficiency Time Power margin for DCH power control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page22 HSDPA Power Allocation Parameters Parameter Name HS-PDSCH, HS-SCCH, E-AGCH, E-RGCH and E- HICH Total Power Parameter ID HSPAPOWER GUI Range 0–500 Physical Range & Unit 0 dBm–50 dBm Unit: 0.1 dBm Default Value 430 (43 dBm) Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: This parameter sets the maximum available power for HS-PDSCH, HS-SCCH, E- AGCH, E-RGCH and E-HICH. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page23 HSDPA Power Allocation Parameters Parameter Name Power Margin Parameter ID PWRMGN GUI Range 0–100 Physical Range & Unit Percent % Default Value 10 Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: Power margin for R99 power control in one TTI Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page24 HSDPA Power Allocation Parameters Parameter Name Max Power per H user Parameter ID MXPWRPHUSR GUI Range 1–100 Physical Range & Unit 1%~100% Unit:1% Default Value 100 Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: The power of each HSDPA user in one TTI will be limited by this parameter value Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page25 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page26 HSDPA Power Control  HS-DPCCH Power Control  Power Offset of ACK, NACK and CQI (Non SHO & SHO)  There is no separate power control for HS-DPCCH but setting several power offsets between HS-DPCCH and UL associated DPCCH. ACK / NACK CQI  / NACK  ACK CQI Time Power Power Uplink DPCCH Time Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page27 HSDPA Power Control  HS-DPCCH Power Control  In soft handover area, the UL combining gain reduces the necessary transmission power of UL DPCCH. While HS- DPCCH does not has the UL combining gain, to maintain the receiving quality of the HS-DPCCH, higher power offset is needed. Thus, when UE enters or leaves the soft handover area, the power offset for ACK/NACK and CQI may have a change correspondingly. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page28 HSDPA Power Control Parameters Parameter Name ACK poweroffset1 ACK poweroffset2 ACK poweroffset3 Parameter ID ACKPO1, ACKPO2, ACKPO3 Note: ACKPO1 is for such UEs whose Minimum inter-TTI interval equals one, that is, such UEs can feedback one ACK or NACK each TTI. ACKPO2 is for such UEs whose Minimum inter-TTI interval equals two, that is, such UEs can feed back one ACK or NACK each at least two TTIs, so in the two TTIs, UEs can repeat the same ACK or NACK. ACKPO3 is for such UEs whose Minimum inter-TTI interval equals three, that is, such UEs can feed back one ACK or NACK each at least three TTIs, so in the three TTI, UEs can repeat the same ACK or NACK. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15), PO_12/15(12/15), PO_9/15(9/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of ACK(D ACK ) comparing to uplink DPCCH power in non-soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page29 HSDPA Power Control Parameters Parameter Name ACK poweroffset1 multi-RLS ACK poweroffset2 multi-RLS ACK poweroffset3 multi-RLS Parameter ID ACKPO1FORSHO, ACKPO2FORSHO, ACKPO3FORSHO Note: ACKPO1FORSHO is for such UEs whose Minimum inter-TTI interval equals one, that is, such UEs can feedback one ACK or NACK each TTI. ACKPO2FORSHO is for such UEs whose Minimum inter-TTI interval equals two, that is, such UEs can feedback one ACK or NACK each at least two TTIs, so in the two TTIs, UEs can repeat the same ACK or NACK. ACKPO3FORSHO is for such UEs whose Minimum inter-TTI interval equals three, that is, such UEs can feedback one ACK or NACK each at least three TTIs, so in the three TTI, UEs can repeat the same ACK or NACK. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15), PO_24/15(24/15), PO_24/15(24/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of ACK (D ACK ) comparing to uplink DPCCH power in soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page30 HSDPA Power Control Parameters Parameter Name NACK poweroffset1 NACK poweroffset2 NACK poweroffset3 Parameter ID NACKPO1, NACKPO2, NACKPO3 Note: NACKPO1 is for such UEs whose Minimum inter-TTI interval equals one, that is, such UEs can feedback one ACK or NACK each TTI. NACKPO2 is for such UEs whose Minimum inter-TTI interval equals two, that is, such UEs can feedback one ACK or NACK each at least two TTsI, so in the two TTIs, UEs can repeat the same ACK or NACK. NACKPO3 is for such UEs whose Minimum inter-TTI interval equals three, that is, such UEs can feedback one ACK or NACK each at least three TTIs, so in the three TTI, UEs can repeat the same ACK or NACK. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15), PO_12/15(12/15), PO_9/15(9/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of NACK (D NACK ) comparing to uplink DPCCH power in non-soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page31 HSDPA Power Control Parameters Parameter Name NACK poweroffset1 multi-RLS NACK poweroffset2 multi-RLS NACK poweroffset3 multi-RLS Parameter ID NACKPO1FORSHO, NACKPO2FORSHO, NACKPO3FORSHO Note: NACKPO1FORSHO is for such UEs whose Minimum inter-TTI interval equals one, that is, such UEs can feedback one ACK or NACK each TTI. NACKPO2FORSHO is for such UEs whose Minimum inter-TTI interval equals two, that is, such UEs can feedback one ACK or NACK each at least two TTIs, so in the two TTIs, UEs can repeat the same ACK or NACK. NACKPO3FORSHO is for such UEs whose Minimum inter-TTI interval equals three, that is, such UEs can feedback one ACK or NACK each at least three TTIs, so in the three TTI, UEs can repeat the same ACK or NACK. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15), PO_24/15(24/15), PO_24/15(24/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of NACK (D NACK ) comparing to uplink DPCCH power in soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page32 HSDPA Power Control Parameters Parameter Name CQI Power Offset Parameter ID CQIPO Note: CQIPO is for all UEs without regard to Minimum inter-TTI interval. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of CQI (D CQI ) comparing to uplink DPCCH power in non-soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page33 HSDPA Power Control Parameters Parameter Name CQI Power Offset multi-RLS Parameter ID CQIPOFORSHO Note: CQIPOFORSHO is for all UEs without regard to Minimum inter-TTI interval. GUI Range PO_5/15, PO_6/15, PO_8/15, PO_9/15, PO_12/15, PO_15/15, PO_19/15, PO_24/15, PO_30/15, Physical Range & Unit 5/15, 6/15, 8/15, 9/15, 12/15, 15/15, 19/15, 24/15, 30/15, Default Value PO_24/15(24/15) Optional/Mandatory Mandatory MML Command ADD CELLHSDPCCH Description: This parameter sets the power offset of CQI (D CQI ) comparing to uplink DPCCH power in soft handover status. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page34 HSDPA Power Control  HS-SCCH Power Control  Fixed Power  Set fixed power for each HS-SCCH by O&M  Simple to configuration, but low utilization of the power  Based on CQI  If the HS-SCCH Power Control Method parameter is set to CQI, the NodeB adjust the transmission power of HS-SCCH, depending on the following information – CQI reported by UE – DTX detected by NodeB – Target frame error rate ( FER ) of HS-SCCH Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page35 HSDPA Power Control Parameters Parameter Name HS-SCCH Power Control Method Parameter ID SCCHPWRCM GUI Range FIXED, CQI Physical Range & Unit None Default Value CQI Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: This parameter sets the power control method for HS-SCCH. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page36 HSDPA Power Control Parameters Parameter Name HS-SCCH Power Parameter ID SCCHPWR GUI Range 0–80 Physical Range & Unit -10 dB to 10 dB , Step: 0.25 dB Default Value 28 ( -3 dB ) Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: When the HS-SCCH Power Control Method is set to FIXED, the parameter sets the fixed transmit power of HS-SCCH. The parameter value is relative to the P- CPICH power in dB Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page37 HSDPA Power Control Parameters Parameter Name HS-SCCH FER Parameter ID SCCHFER GUI Range 1–999 Physical Range & Unit Permillage Default Value 10 (1%) Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: This parameter sets the target FER of the HS-SCCH. If the HS-SCCH FER is larger than the HS-SCCH FER target, the HS-SCCH power will be increased. Otherwise, the HS-SCCH power will be decreased. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page38 HSDPA Power Control  HS-PDSCH Power Control  Power is allocated in NodeB, Mac-hs allocates HS-PDSCH power for different HSDPA users with scheduling algorithm  When configured by static HSDPA power allocation algorithm, the total power of HS-PDSCH and HS-SCCH shall not exceed the maximum transmission power  When configuredby dynamic HSDPA power allocation algorithm, the maximum transmission power is the remaining power excluding R99 power and power margin Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page39 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page40 HSDPA Mobility Management  HSDPA connection  One HSDPA user has up to one HSDPA connection with network at the same time  HSDPA connection HO means HO caused by moving  DPCH connection  DPCH connection has same function as R99 HO, Containing SHO, HHO and inter-RAT HO  Both HSDPA connection and DPCH connection HO are based on UE measurement report and other information, and they are controlled by UTRAN side  The HSDPA mobility management includes all the mobility scenarios that HSDPA serving cell is involved, including the following three types of scenario:  HSDPA cell <-> R99 cell  HSDPA cell <-> HSDPA cell  HSDPA cell <-> GSM/GPRS cell Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page41 Handover between HSDPA and R99 cells Cell 2(R99) Cell 1(HSDPA) Cell 2(R99) Cell 1(HSDPA) before handover after handover Cell 2(R99) Cell 1(HSDPA) Cell 2(R99) Cell 1(HSDPA) before handover after handover Cell 2(R99) Cell 1(HSDPA) Cell 2(R99) Cell 1(HSDPA) before handover after handover Soft handover The 1B (remove) is triggered by HSDPA cell Inter-frequency handover 2B is triggered by R99 cell Soft handover HSDPA cell is added into active set The 1D event is triggered by HSDPA cell Inter-frequency handover The 2B event is triggered by HSDPA cell Cell 2(R99) Cell 1(HSDPA) Cell 2(R99) Cell 1(HSDPA) before handover after handover Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page42 HSDPA Handover Parameters Parameter Name The timer length of D2H Intra-handover Parameter ID D2HIntraHoTimerLen GUI Range 0–999 Physical Range & Unit 0–999 (s) Default Value 2 Optional/Mandatory Optional MML Command SET HOCOMM Description: This parameter specifies the length of D2H penalty timer after the intra- frequency handover. It is a non-periodic timer that defines the period for D2H penalty after the soft handover and intra-frequency hard handover and helps to avoid ping-pang effect Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page43 HSDPA Handover Parameters Parameter Name The timer length of D2H Inter-handover Parameter ID D2HInterHoTimerLen GUI Range 0–999 Physical Range & Unit 0–999 (s) Default Value 2 Optional/Mandatory Optional MML Command SET HOCOMM Description: This parameter specifies the length of D2H penalty timer after the inter-frequency handover. It is the non-periodic timer that defines the period for D2H penalty after the inter-frequency hard handover and helps to avoid ping-pong effect Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page44 HSDPA Handover Parameters Parameter Name The timer length of Multi-Carrier handover Parameter ID MultiCarrierHoTimerLen GUI Range 0–999 Physical Range & Unit 0–999 (s) Default Value 14 Optional/Mandatory Optional MML Command SET HOCOMM Description: This parameter specifies the length of Multi-Carrier Anti-Ping Pong Timer after handover. It is the non-periodic timer that defines the period for D2H penalty for source cell after handover and helps to avoid Ping-Pong effect. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page45 Handover between HSDPA and HSDPA cells before handover after handover Cell 2(HSDPA) Cell 1(HSDPA) Cell 2(HSDPA) Cell 1(HSDPA) before handover after handover Cell 2(HSDPA) Cell 1(HSDPA) Cell 2(HSDPA) Cell 1(HSDPA) The 1D event is triggered by cell 2 Inter-frequency handover 2B is triggered by HSDPA cell (cell2) Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page46 HSDPA Handover Parameters Parameter Name HSPA hysteresis timer length Parameter ID HSPATIMERLEN GUI Range 0–1024 Physical Range & Unit 0–1024 (s) Default Value 0 Optional/Mandatory Optional MML Command SET HOCOMM Description: HSPA handover is triggered by event 1D. To avoid ping-pang HSPA serving cell update, a protection timer is used. After event 1D triggers HSPA handover, this timer is started. Then, event 1D will not trigger HSPA handover any more before expiry of this timer. Value 0 means this timer is not started; that is, HSPA handover is trigger immediately. Value 1024 means HSPA handover will not be triggered before the cell bearing the HSPA service is removed. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page47 Handover between HSDPA and GSM/GPRS cells  The handover between the HSDPA cell and GSM/GPRS cell is the same as the handover between the R99 cell and the GSM/GPRS cell Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page48 HSDPA Direct Retry  The HSDPA direct retry is triggered by the following factors:  HSDPA Request is Initiated in the R99 Cell  Traffic Volume Increases  Timer (HRetryTimerLen)  Access to the Original HSDPA Cell is Rejected are set on cell a Cell b(f2, R99) Cell a(f1,HSDPA) UE initiates HSDPA service request from cell b After DRD, UE HSDPA service Cell b(f2, R99) Cell a(f1,HSDPA) Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page50 HSDPA Channel Switching Parameters Parameter Name H Retry timer length Parameter ID HRetryTimerLen GUI Range 0, 1～180 Physical Range & Unit 0, 1～180s Default Value 5 Optional/Mandatory Optional MML Command SET COIFTIMER Description: This parameter defines the timing length of the HSDPA directed retry timer, through which the network periodically attempts to map the HSDPA-supported services on the HS-DSCH. The timer works periodically without limit to retry times. The HSDPA directed retry timer is in OFF state (or is turned off) when its timing length is set to zero. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page51 HSDPA Channel Switching With introducing HSDPA technology, the UE has one more RRC state CELL_DCH (with HS-DSCH). CELL_PCH CELL_FACH CELL_DCH CELL_DCH (with HS-DSCH) UE State Transition Channel Switching Cell-DCH ( with HS-DSCH ) ↔ Cell-DCH HS-DSCH ↔ DCH Cell-DCH ( with HS-DSCH ) ↔ Cell-FACH HS-DSCH ↔ FACH Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page52 HSDPA Channel Switching  Channel Switching between HS-DSCH and DCH  Channel Switch from HS-DSCH to DCH – Mobility based  Channel Switch from DCH to HS-DSCH – Mobility Management – Traffic Volume – Timer (HRetryTimerLen) Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page53 HSDPA Channel Switching  Channel Switching between HS-DSCH and FACH  Since the HSDPA UE occupies the DPCH, the RAN will switch the transport channel from HS-DSCH to FACH to reduce occupation of the DPCH when the following conditions are met.  The HS-DSCH carries the BE service or the PS streaming service for the UE.  There is no data flow of any of the services for a certain length of time.  By contrary, if data service activity increased, for example, when the RNC receives a 4a event measuring report ,state transfer is triggered for cell-FACH to Cell-DCH ( with HS- DSCH ) Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page54 HSDPA Channel Switching Parameter Name BE HS-DSCH to FACH transition timer [s] Parameter ID BeH2FTvmThd GUI Range 1～65535 Physical Range & Unit 1～65535 s Default Value 180 Optional/Mandatory Optional MML Command SET UESTATETRANS Description: This parameter is used to detect the stability of a UE in low activity state in CELL_DCH (with HS-DSCH) state Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page55 HSDPA Channel Switching Parameter Name Realtime Traff DCH or HS-DSCH to FACH transition timer[s] Parameter ID RtDH2FStateTransTimer GUI Range 1～65535 Physical Range & Unit 1～65535s Default Value 180 Optional/Mandatory Optional MML Command SET UESTATETRANS Description: timer is used in detecting whether a real-time service UE in CELL_DCH state is in stable low activity state Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page56 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling Algorithm 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page57 HSDPA Scheduling Algorithm  Huawei supports four MAC-hs scheduling algorithms: Max C/I, RR (Round Robin), PF (Proportional Fair), and EPF (Enhanced Proportional Fair) Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page58 HSDPA Scheduling Algorithm PF (Proportional Fair ) For the user selection in PF scheduling algorithm, CQI, the filtered scheduling rate of UE are taken into account. The scheduling priority is calculated with the following formula :  is the instant rate of UE i which can be reached according to the CQI_i at the scheduling time t. Is equal to TBS_i / TTI  is the user's scheduling rate during previous period ) ( ) ( Pr max _ t r t R iority i i i  ) ( max _ t R i ) ( max _ t R i ) (t r i Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page59 HSDPA Scheduling Algorithm  EPF ( Enhanced Proportional Fair )  Based on the PF algorithm, the EPF algorithm can ensure the users’ Guaranteed Bit Rate (GBR) requirement when the cell is not in congestion, which is useful to guarantee the users’ QoS and fairness. 500ms Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page60 HSDPA Scheduling Algorithm  EPF ( Enhanced Proportional Fair )  In the X time segment, only the users configured with GBR are scheduled according to the PF algorithm.  In the Y time segment, only the users configured with GBR but not achieved are scheduled according to their Scheduling Priority Indicator (SPI). Only when the data rate of users with higher SPI reaches their GBR, the users with lower SPI can be scheduled. Those users with the same SPI will be scheduled according to those CQI, the higher the CQI is, the higher the priority is.  In the Z time segment, all users are scheduled according to the PF algorithm. Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page61 HSDPA Scheduling Algorithm parameters Parameter Name Scheduling Method Parameter ID SM GUI Range EPF (Enhanced PF), PF (PF), RR (Round Robin), MAXCI (Max C/I ) Physical Range & Unit Method Default Value EPF Optional/Mandatory Mandatory MML Command SET MACHSPARA Description: This parameter specifies the algorithm switch used to select the scheduling algorithm Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page62 Contents 1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Allocation 3. HSDPA Power Allocation 4. HSDPA Power Control 5. HSDPA Mobility Management 6. HSDPA Scheduling 7. HSDPA Flow Control Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page63 HSDPA Flow Control  Why ?  Balance the data flow between Iub and Uu  Achieve high bandwidth utilization efficiency, maximize the cell throughput  Decrease data transmission delay, avoid data discard and retransmission due to congestion  Functions  Response to a HS-DSCH Capacity Request, to indicate the number of MAC-d PDUs that the RNC is allowed to transmit for each UE in the specified interval  Modify the capacity and control the user data flow according to the MAC-hs queue buffer size Node B Uu RNC Iub CN Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page64 HSDPA Flow Control Signaling  The Iub HSDPA flow control process is implemented through the capacity request and allocation processes Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page65 HSDPA Flow Control Signaling  The NodeB sends the HS-DSCH Capacity Allocation message to the CRNC in response to a HS-DSCH Capacity Request Thank you www.huawei.com Thank you!
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