217591156 ZTE LTE FDD Handover Feature Guide V1 0

ZTE LTE FDD Handover FeatureGuide V1.0 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 1 LEGAL INFORMATION By accepting this certain document of ZTE CORPORATION you agree to the following terms. If you do not agree to the following terms, please notice that you are not allowed to use this document. Copyright © 2013 ZTE CORPORATION. Any rights not expressly granted herein are reserved. This document contains proprietary information of ZTE CORPORATION. Any reproduction, transfer, distribution, use or disclosure of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. and are registered trademarks of ZTE CORPORATION. ZTE’s company name, logo and product names referenced herein are either trademarks or registered trademarks of ZTE CORPORATION. Other product and company names mentioned herein may be trademarks or trade names of their respective owners. Without the prior written consent of ZTE CORPORATION or the third party owner thereof, anyone’s access to this document should not be construed as granting, by implication, estopped or otherwise, any license or right to use any marks appearing in the document. The design of this product complies with requirements of environmental protection and personal security. This product shall be stored, used or discarded in accordance with product manual, relevant contract or laws and regulations in relevant country (countries). This document is provided “as is” and “as available”. Information contained in this document is subject to continuous update without further notice due to improvement and update of ZTE CORPORATION’s products and technologies. ZTE CORPORATION Address: NO. 55 Hi-tech Road South ShenZhen P.R.China 518057 Website: http://support.zte.com.cn ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 2 ZTE LTE FDD Handover Feature Guide Version Date Author Reviewer Notes V1.0 2013-7-14 Wang Huan Wu Hao Not open to the third party ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 3 TABLE OF CONTENTS 1 INTRODUCTION ............................................................................................................... 2 1.1 SCOPE ..................................................................................................................... 2 1.2 TARGET GROUP .................................................................................................... 2 1.3 FEATURE ATTRIBUTE ........................................................................................... 2 1.4 CORRELATION WITH OTHER FEATURE ............................................................. 2 2 TERMINOLOGY ................................................................................................................ 3 2.1 SPECIFICATION NOTATIONS ............................................................................... 3 3 TECHNICAL DESCRIPTIONS .......................................................................................... 4 3.1 FEATURE DESCRIPTIONS .................................................................................... 4 3.2 TECHNICAL DETAILS ............................................................................................. 4 3.2.1 Measurement Configuration ................................................................................. 4 3.2.2 Measurement Decision for Intra-Frequency Handover ........................................ 8 3.2.3 Measurement Decision for Inter-Frequency Handover ........................................ 9 3.2.4 Handover Decision from LTE to UTRAN ............................................................. 9 3.2.5 Handover Decision from LTE to GERAN ........................................................... 10 3.2.6 CSFB from LTE to Other RATs .......................................................................... 10 3.2.7 Intra-Site Handover ............................................................................................ 10 3.2.8 X2 Handover ...................................................................................................... 11 3.2.9 Intra-RAT S1 Handover ...................................................................................... 13 3.2.10 Inter-RAT Handover ........................................................................................... 14 3.2.11 Redirection ......................................................................................................... 15 4 KEY PARAMETER CONFIGURATION .......................................................................... 19 4.1 PARAMETER LIST ................................................................................................ 19 4.2 PARAMETER CONFIGURATION RULE ............................................................... 20 4.3 PARAMETER CONFIGURATION PROCEDURE ................................................. 28 4.3.1 Pre-Defined Parameters Configuration .............................................................. 28 4.3.2 Activate Feature ................................................................................................. 30 4.3.3 Other Parameter Configuration Procedure ........................................................ 37 4.3.4 Deactivate Feature ............................................................................................. 38 4.3.5 Data Save and Synchronization ......................................................................... 39 5 RELATED COUNTERS, KPI AND ALARMS ................................................................. 39 5.1 RELATED COUNTERS ......................................................................................... 39 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 4 5.2 RELATED KPI ........................................................................................................ 49 5.3 RELATED ALARMS ............................................................................................... 50 6 GLOSSARY .........................................................................................错误！未定义书签。 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 1 FIGURES Figure 3-3-1 Intra-Frequency Handover Based on Coverage ......................................... 8 Figure 4-1 Adding the Cell ............................................................................................. 28 Figure 4-2 Cell Parameter Configuration ....................................................................... 29 Figure 4-3 Automatic Neighbor Cell Configuration Tool .............................................. 29 Figure 4-4 Neighbor Cell Relation Parameter Configuration ......................................... 30 Figure 4-5 Measurement Event Configuration............................................................... 31 Figure 4-6 Inter-Frequency Number and Configuration ............................................... 31 Figure 4-7 X2 SCTP Configuration ................................................................................ 32 Figure 4-8 X2AP Configuration .................................................................................... 33 Figure 4-9 Disabling X2 ................................................................................................. 33 Figure 4-10 UTRAN-FDD Neighbor Cell Configuration ............................................... 34 Figure 4-11 UTRAN-FDD Neighbor Cell Relation Configuration................................... 34 Figure 4-12 UTRAN Frequency Number and Parameters ............................................ 35 Figure 4-13 UTRAN-FDD Neighbor Cell Relation Configuration................................... 36 Figure 4-14 RAT Priority Configuration ......................................................................... 36 Figure 4-15 Redirection Switch Configuration ............................................................... 37 Figure 4-16 Event Index Related to Measurement Events .......................................... 38 Figure 4-17 Parameter Configuration of Measurement Index ....................................... 38 Figure 4-18 Deactivating Handover ............................................................................. 39 TABLES Table 4-1 Handover Related Parameter List ............................................................... 19 Table 4-2 Parameter rule of parameters ...................................................................... 20 Table 5-1 Related Counters ....................................................................................... 39 Table 5-2 Related KPI ................................................................................................ 49 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 2 1 Introduction 1.1 Scope This document describes FDD handover feature or technology within the eNodeB in LTE network. The main contents comprise the following: technical description, key parameters and configuration, related counters, KPI statistics and alarms. 1.2 Target Group This document is intended for:  Engineering personnel and technicians  Maintenance engineers 1.3 Feature Attribute GUL: V4.12.10.15P40 EMS: U31 V12.12.43P02 OMMB: V12.12.40P26 eNodeB: V3.10.20P02 Involved NEs: UE eNodeB MME S-GW BSC/RNC SGSN P-GW HSS √ √ √ - - - - - Note: *-: Not involved *√: involved 1.4 Correlation with Other Feature No ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 3 2 Terminology 2.1 Specification Notations  Procedure When referring to an elementary procedure in the specification the Procedure Name is written with the first letters in each word in upper case characters followed by the word “procedure”, e.g., Random Access procedure.  Message When referring to a message in the specification the MESSAGE NAME is written with all letters in upper case characters followed by the word “message”, e.g., The MME initiates the procedure by sending an E-RAB SETUP REQUEST message to the eNodeB.  Parameter When referring to a parameter in the specification the parameter is written in Italic font, e.g., Band indicator of target ARFCN should be configured by byEutranFDDTarBand for LTE.  IE When referring to an information element (IE) in the specification the Information Element Name is written with the first letters in each word in upper case characters and all letters in Italic font followed by the abbreviation “IE”, e.g., Information Element IE.  Value of an IE When referring to the value of an information element (IE) in the specification the “Value” is written as it is specified enclosed by quotation marks, e.g., This IE shall be present if the Handover Type IE is set to the value “LTEtoGERAN” and the SRVCC HO Indication IE is present. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 4 3 Technical Descriptions 3.1 Feature Descriptions In LTE, UE mobility in RRC_CONNECTED state is realized by handover and redirection. In terms of Radio Access Technology (RAT), the handover can be divided into intra-RAT handover and inter-RAT handover (including UTRAN and GERAN). In terms of different frequency during the handover procedure, the intra-RAT handover can be divided into intra-frequency handover and inter-frequency handover. This document describes the measurement configuration, handover decision, and handover execution procedures. 3.2 Technical Details 3.2.1 Measurement Configuration After the UE initially accesses or hands over into a cell, or the eNB receives a measurement report from the UE, the eNB sends measurement configuration to the UE through an RRC CONNECTION RECONFIGURATION message. Measurement configuration related to handover will be sent to the UE in the following five scenarios: 1. Only intra-frequency neighbor cells a) When the UE initially accesses a cell, the eNodeB sends the measurement configuration (A3 or A5 event) for intra-frequency handover to the UE. If the redirection function is enabled and there are available inter-frequency or inter-RAT frequencies, the A2 measurement event used for redirection is also sent to the UE. b) If the eNodeB receives the intra-frequency measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. c) If the eNodeB receives the A2 measurement report used for redirection, it performs the blind redirection based on the procedure described in 3.2.11 Redirection. 2. Only inter-frequency neighbor cells ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 5 a) When the UE initially accesses a cell, the eNodeB sends the A2 measurement event for opening inter-frequency measurement to the UE. b) After the eNodeB receives the A2 measurement report used for opening inter-frequency measurement, it sends the A3 or A5 measurement event used for inter-frequency handover to the UE, and opens a gap. The eNodeB sends the A1 measurement event used for closing inter-frequency measurement to the UE, and deletes the A2 measurement event used for staring inter-frequency measurement. If the redirection function is enabled and there are available frequencies for redirection, the eNodeB sends the A2 measurement event used for redirection to the UE. Go to the next step. c) If the eNodeB receives the inter-frequency measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. d) If the eNodeB receives the A2 measurement report used for redirection, it performs the blind redirection based on the procedure described in 3.2.11 Redirection. If no measurement report is received, go to the next step. e) After the eNodeB receives the A1 measurement report, it deletes the A1 measurement configuration, closes the gap, and deletes the measurement configuration used for inter-frequency handover. If there is A2 measurement configuration used for redirection, the eNodeB deletes the configuration and sends the A2 measurement event used for staring inter-frequency measurement to the UE, which means returning to state a). 3. Only inter-RAT neighbor cells: a) When UE initially accesses a cell, the eNodeB sends the A2 measurement event for staring inter-RAT measurement to the UE. b) After the eNodeB receives the A2 measurement report used for opening inter-RAT measurement, it sends the measurement configuration (B2 or B1 event) used for inter-RAT handover to UE, and opens a gap. The eNodeB sends the A1 measurement event used for stopping inter-RAT measurement, and deletes the A2 measurement event used for staring inter-RAT measurement. If the redirection function is enabled and there are available frequencies, the eNodeB sends the A2 measurement event used for redirection to the UE. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 6 c) If the eNodeB receives the inter-RAT measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. d) If the eNodeB receives the A2 measurement report used for redirection, it performs the blind redirection based on the procedure described in 3.2.11 Redirection. If no measurement report is received, go to the next step. e) If the eNodeB receives the A1 measurement report, it deletes the A1 measurement configuration, closes the gap, and deletes the measurement configuration used for inter-RAT handover. If there is A2 measurement configuration used for redirection, the eNodeB deletes the configuration and sends the A2 measurement event used for staring inter-RAT measurement to the UE, which means returning to state a). 4. Both inter-frequency and inter-RAT neighbor cells exist, and interFandInterR is set to 0 (both inter-frequency and inter-RAT measurement commands are sent): a) When UE initially accesses a cell, the eNodeB sends the higher one of the thresholds of A2 measurements used for starting inter-frequency or inter-RAT measurements to the UE. This measurement event is called initial A2 measurement event. b) After the eNodeB receives the initial A2 measurement report, it sends the measurement configuration (A3 or A5 event) used for inter-frequency handover and measurement configuration (B2 or B1 event) used for inter-RAT handover to the UE. The eNodeB opens a gap, sends the A1 measurement event used for stopping inter-frequency/RAT measurement to the UE, and deletes the initial A2 measurement event. If the redirection function is enabled and there are available frequencies, the eNodeB sends the A2 measurement event used for redirection to the UE. Go to the next step. c) If the eNodeB receives the inter-frequency measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. d) If the eNodeB receives the inter-RAT measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. e) If the eNodeB receives the A2 measurement report used for redirection, it performs the blind redirection based on the ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 7 procedure described in 3.2.11 Redirection. If no measurement report is received, go to the next step. f) After the eNodeB receives the A1 measurement report, it deletes the A1 measurement configuration, closes the gap, and deletes the measurement configuration used for inter-frequency and inter-RAT handovers. If there is A2 measurement configuration used for redirection, the eNodeB deletes the configuration and sends the initial A2 measurement event to the UE, which means returning to state a). 5. Both inter-frequency and inter-RAT neighbor cells exist, and interFandInterR is set to 1 (inter-frequency measurement event is sent to the UE before inter-RAT measurement event): a) When the UE initially accesses a cell, the eNodeB sends the A2 measurement event for staring inter-frequency measurement to the UE. b) After the eNodeB receives the A2 measurement report, it sends the measurement configuration (A3 or A5 event) used for inter-frequency handover to the UE. The eNodeB deletes the A2 measurement event used for staring inter-frequency measurement, and sends the A2 measurement configuration (B2 or B1 event) used for starting inter-RAT measurement to the UE. The eNodeB opens a gap, and sends the A1 measurement event used for stopping inter-frequency and inter-RAT measurement to the UE. Go to the next step. c) If the eNodeB receives the inter-frequency measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. d) If the eNodeB receives the A1 measurement report, it deletes the measurement configuration used for inter-frequency handover. The eNodeB deletes the A2 measurement event used for staring inter-RAT measurement, and sends the A2 measurement event used for starting inter-frequency measurement to the UE, which means returning to state a). If no measurement report is received, go to the next step. e) If the eNodeB receives the A2 measurement report used for starting inter-RAT measurement, it sends the measurement configuration (B2 or B1 event) used for inter-RAT handover to the UE. The eNodeB deletes the A2 measurement configuration used for starting inter-RAT measurement. If the redirection function is enabled and there are available frequencies, the eNodeB sends the A2 measurement ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 8 configuration used for redirection to the UE. Go to the next step. f) If the eNodeB receives the inter-RAT measurement report, it makes the handover decision and executes handover. If no measurement report is received, go to the next step. g) If the eNodeB receives the A2 measurement report used for redirection, it performs the blind redirection based on the procedure described in 3.2.11 Redirection. If no measurement report is received, go to the next step. h) If the eNodeB receives the A1 measurement report, it deletes the A1 measurement configuration, closes the gap, and deletes the measurement configuration used for inter-frequency and inter-RAT handovers. If there is A2 measurement configuration used for redirection, the eNodeB deletes the configuration and sends the A2 measurement event used for starting inter-frequency handover to the UE, which means returning to state a). 3.2.2 Measurement Decision for Intra-Frequency Handover Figure 3-3-1 Intra-Frequency Handover Based on Coverage Cell A Freq 1 Cell B Freq 1 If the frequency used in the source cell and the frequency used in the target cell are the same, the handover is called intra-frequency handover. When the eNodeB receives the measurement report used for intra-frequency handover, it selects the handover target cell from the neighbor cell list in the measurement report. The target neighbor cell must meet the following requirements: 1) The neighbor cell supports handover. 2) The neighbor cell supports RRC_CONNECTED state. If there are multiple neighboring cells that meet the above requirements, the eNodeB sorts them based on the signal strength and initiates intra-frequency handovers to the cells in sequence. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 9 3.2.3 Measurement Decision for Inter-Frequency Handover Figure 3-2 Inter-Frequency Handover Based on Coverage Cell A Freq 1 Cell B Freq 2 If the frequency used in the source cell and the frequency used in the target cell are different, the handover is called inter-frequency handover. When the eNodeB receives the measurement report used for inter-frequency handover, If the UE supports inter-frequency handover (FG bit 13), the eNodeB selects the handover target cell from the neighbor cell list in the measurement report. The target neighbor cell must meet the following requirements: 1) The neighbor cell supports handover. 2) The neighbor cell supports RRC_CONNECTED state. If there are multiple neighboring cells that meet the above requirements, the eNodeB sorts them based on the signal strength and initiates inter-frequency handovers to the cells in sequence. Note: If the handover is an intra-LTE inter-mode inter-frequency handover (the serving cell belongs to LTE FDD, and the neighbor cell in the measurement report belongs to TD LTE), for R8 terminals, only FG bit 13 is used to determine whether the UE supports inter-frequency handover, while for R9 or later terminals, FG bit 30 is also used to determine whether the UE supports inter-frequency handover. 3.2.4 Handover Decision from LTE to UTRAN After the eNodeB receives the measurement report about UTRAN neighboring cells, it makes handover decision based on the UE capability and neighbor cell configuration. To perform PS HO, the following requirements must be met: 1) The UE supports UTRAN PS Handover (FG bit 8). 2) UTRAN supports PS handover. 3) The neighbor relation supports handover. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 10 If there are candidate cells that support PS HO, the eNodeB sorts the cells based on channel quality, and initiates inter-RAT handovers from the LTE cell to the UTRAN cells in sequence. 3.2.5 Handover Decision from LTE to GERAN After the eNodeB receives the measurement report about GERAN neighbor cells, it makes handover decision based on the UE capability and neighbor cell configuration. To perform CCO, the following requirements must be met: 1) The UE supports CCO (FG bit 10). If there are candidate cells that support CCO, the eNodeB sorts the cells based on channel quality, and initiates inter-RAT handovers from the LTE cell to the GERAN cells in sequence. Note: PS HO from LTE to GERAN is not supported in the current version. 3.2.6 CSFB from LTE to Other RATs In the initial deployment phase of LTE, the core network is not equipped with IMS, and the LTE network cannot provide voice services. In this case, voice services can be directed to other RATs by CS fallback. When the eNodeB receives MME INITIAL CONTEXT SETUP REQUEST message or UE CONTEXT MODIFICATION REQUEST message, and CS Fallback Indicator IE is contained, it starts the CSFB procedure. There are two CSFB modes: blind CSFB and CSFB based on measurements. 1) CSFB from LTE to UTRAN When the UE initiates the voice service, LTE moves the UE to UTRAN by PS HO or Redirection. The voice service is provided by UTRAN. 2) CSFB from LTE to GERAN When the UE initiates the voice service, LTE moves the UE to GERAN by PS HO, CCO, or Redirection. The voice service is provided by GERAN. For more details, refer to the documents related to CSFB. 3.2.7 Intra-Site Handover When the source cell and target cell involved in a handover are in the same eNodeB, the handover is called intra-site handover. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 11 Figure 3-3 Intra-Site Handover Source Cell UE Target cell RRcConnectionReconfiguration Random Access Procedure RRcConnectionReconfigurationComplete The intra-site handover procedure is described as follows: 1) The source cell sends an RRC CONNECTION RECONFIGURATION message (containing mobilityControlInfo IE) to the UE, instructing the UE to access the target cell. 2) The UE initiates random access to the target cell. 3) When the UE accesses the target cell, it sends an RRC CONNECTION RECONFIGURATION COMPLETE message to the target cell to confirm that the handover is successful. 3.2.8 X2 Handover Figure 3-4 X2 Handover UE Target eNodeB Source eNodeB RRcConnectionReconfiguration Random Access Procedure RRcConnectionReconfigurationComplete MME/S-GW HandoverRequest HandoverRequestAcknowledge SNStatusTransfer PathSwitchRequest PathSwitchRequestAcknowledge Data Forwarding The X2 handover procedure is described as follows: 1) The source eNodeB sends a HANDOVER REQUEST message to the target eNodeB, including necessary information for handover. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 12 2) The target eNodeB prepares for handover at Layer 1 and layer 2, establishes the user-plane path for data forwarding, and sends a HANDOVER REQUEST ACKNOWLEDGE message to the source eNodeB. If data forwarding is required, a path for uplink data forwarding and a path for downlink data forwarding are established for each E-RAB. The HANDOVER REQUEST ACKNOWLEDGE message contains a container, which contains an RRC CONNECTION RECONFIGURATION message with MobilityControlInfo IE contained in the message. 3) The source eNodeB sends an RRC CONNECTION RECONFIGURATION message (containing MobilityControlInfo IE) to the UE, instructing the UE to access to the target eNodeB. 4) The source eNodeB sends an SN STATUS TRANSFER message to the target eNodeB, to transmit the uplink PDCP SN receiving status and downlink PDCP SN transmitting status of each E-RAB. 5) The source eNodeB establishes the user-plane path for data forwarding, and transmits user data to the target eNodeB. 6) The UE performs downlink synchronization and random access to the target cell. 7) After the UE accesses the target cell, it sends an RRC CONNECTION RECONFIGURATION COMPLETE message to the target cell to confirm the handover is successful. 8) The target eNodeB sends a PATH SWITCH message to the MME, and inform the MME that the UE has changed its serving cell. 9) After the MME receives the PATH SWITCH message, it sends the PATH SWITCH ACKNOWLEDGE message to the target eNodeB. 10) The X2 handover procedure ends. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 13 3.2.9 Intra-RAT S1 Handover Figure 3-5 Intra-RAT S1 Handover The S1 handover procedure is described as follows: 1) The source eNodeB sends a HANDOVER REQUIRED message to the MME, instructing whether data forwarding is required (indicated by DL Forwarding IE) for each E-RAB and whether the direct forwarding path from the source eNodeB to target eNodeB is available (indicated by Direct Forwarding Path Availability IE). 2) The MME sends a HANDOVER REQUEST message to the target eNodeB. The target eNodeB establishes the UE context after receiving the message. 3) The target eNodeB prepares for handover with Layer 1 and layer 2, establishes the user-plane path for data forwarding, and sends a HANDOVER REQUEST ACKNOWLEDGE message to the MME. The RRC message used for handover is contained in Target to Source Transparent Container IE of this message. 4) The MME sends a HANDOVER COMMAND message to the source eNodeB. Bearers Subject to Forwarding IE of this message contains the address list and TEID for data forwarding allocated by the target UE Target eNodeB Source eNodeB RRcConnectionReconfiguration Random Access Procedure RRcConnectionReconfigurationComplete MME/S-GW HandoverRequired HandoverRequestAcknowledge eNBStatusTransfer HandoverNotify UeContextReleaseCommand Only for Direct Data Forwarding HandoverRequest HandoverCommand MMEStatusTransfer Only for Indirect Data Forwarding UeContextReleaseComplete ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 14 eNodeB. If the source eNodeB uses indirect path for data forwarding, the MME and SGW prepare the user-plane path for data forwarding. 5) The source eNodeB sends an RRC CONNECTION RECONFIGURATION message to the UE, and informs the UE to move to the target cell. 6) The source eNodeB sends eNodeB a STATUS TRANSFER message to the MME, with the uplink PDCP SN receiving status and downlink PDCP SN transmitting status of each E-RAB. 7) The MME sends an MME STATUS TRANSFER message to the target eNodeB. 8) The source eNodeB starts data forwarding on the direct path or indirect path determined before. 9) The UE initiates random access to the target cell. 10) When the UE accesses the target cell, it sends an RRC CONNECTION RECONFIGURATION COMPLETE message to the target cell to confirm that the handover is successful. 11) The target eNodeB sends a HANDOVER NOTIFY message to the MME to confirm the UE successfully accesses the target eNodeB. 12) The MME sends a UE CONTEXT RELEASE COMMAND message to the source eNodeB. 13) The source eNodeB releases the UE related resources, and sends a UE CONTEXT RELEASE COMPLETE message to the MME. 14) The S1 handover procedure ends. 3.2.10 Inter-RAT Handover E-UTRAN sends a MOBILITY FROM EUTRA COMMAND message (with Handover or CellChangeOrder IE) to the UE in RRC_CONNECTED state, and indicates the UE to perform PS HO to UTRAN or perform PS HO or CCO to GERAN. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 15 Figure 3-6 Inter-RAT Handover The inter-RAT handover procedure is described as follows: 1) The eNodeB sends a HandoverRequired message to the MME, and the MME interacts with the target RAT. The target RAT establishes the UE context. 2) After MME interacts with the target RAT, it sends a Handover Command message to the eNodeB. 3) The eNodeB sends a MobilityFromEutraCommand message to the UE, and the UE performs random access to the inter-RAT system cell. 4) After the UE successfully accesses the target cell, the MME informs the source eNodeB to release the UE context. 3.2.11 Redirection The mobility in RRC_CONNECTED state is realized by PS HO, CCO, and Redirection. The priority based on time delay: PS HO > CCO > Redirection When PS handover and CCO are not supported, the eNodeB indicates the UE to perform redirection by redirectedCarrierInfo IE in the RRC CONNECTION RELEASE message. There are two redirection types: blind redirection and redirection based on measurements. 1. Blind Redirection: UE eNB MME MeasurementReport HandoverRequired HandoverCommand MobilityFromEutraCommand UeContextReleaseCommand UeContextReleaseComplete ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 16 Figure 3-7 Blind Redirection After the eNodeB receives the A2 measurement report used for blind redirection, it makes the redirection decision. 1) The eNodeB selects the highest priority RAT that the UE supports in RAT priorities (ratPriorityPara), and go to the next step. 2) The eNodeB selects the highest priority (non zero) frequency that the UE supports as the target frequency. If there are available frequencies, go to step 4. If there are no available frequencies, go to the next step. 3) If there are no available frequencies in the target RAT, the eNodeB selects the second highest priority RAT that UE supports as the target RAT. Return to 2). 4) The eNodeB sends the selected frequencies to the UE. 2. Redirection based on measurements: UE CONTEXT RELEASE COMPLETE eNodeB UE CONTEXT RELEASE COMMAND MME UE CONTEXT RELEASE REQUEST UE MEASUREMENT REPORT RRCC ONNECTION RELEASE (A2 measurement report for redirection) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 17 Figure 3-8 Inter-Frequency Redirection Based on Measurements 1) Inter-frequency Redirection: After the eNodeB receives the measurement report used for inter-frequency handover, it indicates the UE to perform redirection to the frequency in the measurement report when the following requirements are met: a) The UE does not support inter-frequency handover, or (and) the neighboring cell does not support handover, or b) Only unknown PCIs are contained in the measurement report, or c) Unknown PCIs are contained in the measurement report, and all known PCIs have failed for handover, and d) No cell in the measurement report is in the handover limit list. 2) Inter-RAT Redirection: UE CONTEXT RELEASE COMPLETE eNodeB UE CONTEXT RELEASE COMMAND MME UE CONTEXT RELEASE REQUEST UE MEASUREMENT REPORT RRCC ONNECTION RELEASE (Measurement report for inter-frequency handover) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 18 Figure 3-9 Inter-RAT Redirection Based on Measurements After the eNodeB receives the measurement report used for inter-RAT handover, it indicates the UE to perform redirection to the RART and frequency in the measurement report when the following requirements are met: a) The UE does not support inter-RAT handover, or (and) the neighboring cell does not support handover, and b) When the RAT in the measurement report is GERAN, and the UE does not support CCO, or c) Only unknown PCIs are contained in the measurement report, or d) Unknown PCIs are contained in the measurement report, and all known PCIs have failed for handover, and After the UE receives an RRC CONNECTION RELEASE message with redirectedCarrierInfo IE, it performs redirection to the frequency in the target RAT. UE CONTEXT RELEASE COMPLETE eNodeB UE CONTEXT RELEASE COMMAND MME UE CONTEXT RELEASE REQUEST UE MEASUREMENT REPORT RRCC ONNECTION RELEASE (Measurement report for inter-RAT handover) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 19 4 Key Parameter Configuration 4.1 Parameter List Table 4-1 Handover Related Parameter List SN Name Figure 1 Band indication for frequency Figure 4-1,4-2 2 Uplink center carrier frequency Figure 4-1,4-2 3 Downlink center carrier frequency Figure 4-1,4-2 4 Physical cell id Figure 4-1,4-2 5 Close inter-frequency or intersystem measurement configuration index Figure 4-5 6 Open inter-frequency measurement configuration index Figure 4-5 7 Coverage-based intra-frequency handover measurement configruration index Figure 4-5 8 InterFreq measurement configuration index for handover Figure 4-5 9 Inter-frequency number Figure 4-6 10 Band indicator for DL frequency Figure 4-6 11 Inter-frequency Figure 4-6 12 Switch for not to remove neighboring cell Figure 4-4 13 Switch for X2 Figure 4-4 14 Switch for HO Figure 4-4 15 S1 handover data direct forward supported Figure 4-4 16 Uplink center carrier Frequency Figure 4-10 17 Downlink center carrier frequency Figure 4-10 18 RNC ID Figure 4-10 19 Cell ID Figure 4-10 20 Cell primary scrambling code Figure 4-10 21 Location Area Code Figure 4-10 22 Routing Area Code Figure 4-10 23 Frequency band indication of UTRAN Figure 4-10 24 UTRAN neighbor cell supported PS HO Figure 4-10 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 20 25 Handover support Figure 4-11 26 UTRAN-frequency number Figure 4-12 27 RAT priority Figure 4-14 28 Redirection algorithm for coverage Figure 4-15 4.2 Parameter Configuration Rule Table 4-2 Parameter rule of parameters SN Name Description Value Range Default Value 1 Band indication for frequency The parameter indicates the frequency band for downlink and uplink frequency. The downlink and uplink frequency is own to the sanme band. 1-5,7-14,17-28,101 1 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 21 2 Uplink center carrier frequency The parameter indicates the uplink E-UTRA Absolute Radio Frequency Channel Number (EARFCN). 1:1920-1980, 2:1850-1910, 3:1710-1785, 4:1710-1755, 5:824-849, 7:2500-2570, 8:880-915, 9:1749.9-1784.9, 10:1710-1770,11:1427.9 -1452.9, 12:698-716, 13:777-787, 14:788-798, 17:704-716, 18:815-830,19:830-845, 20:832-862,21:1447.9-1 462.9, 22:3410-3490,23:2000-2 020, 24:1626.5-1660.5,25:18 50-1915, 26:814-849,27:807-824, 28:703-748,101:962-977 1930 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 22 3 Downlink center carrier frequency The parameter indicates the downlink E-UTRA Absolute Radio Frequency Channel Number (EARFCN). 1:1920-1980, 2:1850-1910, 3:1710-1785, 4:1710-1755, 5:824-849, 7:2500-2570, 8:880-915, 9:1749.9-1784.9, 10:1710-1770,11:1427.9 -1452.9, 12:698-716, 13:777-787, 14:788-798, 17:704-716, 18:815-830,19:830-845, 20:832-862,21:1447.9-1 462.9, 22:3410-3490,23:2000-2 020, 24:1626.5-1660.5,25:18 50-1915, 26:814-849,27:807-824, 28:703-748,101:962-977 2120 4 Physical cell id The parameter is used to identify a cell. There are 504 unique physical-layer cell identities. 0-503 0 5 Close inter-frequ ency or intersyste m measurem ent configurati on index The parameter is used to close inter-frequency measurement 1-2048 10 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 23 6 Open inter-frequ ency measurem ent configurati on index The parameter is used to open inter-frequency measurement. 1-2048 11 7 Coverage- based intra-frequ ency handover measurem ent configrurati on index The parameter is used to config intra-frequency measurement. 1-2048 50 8 InterFreq measurem ent configurati on index for handover The parameter is used to config inter-frequency measurement. 1-2048 70 9 Inter-frequ ency number The parameter is used to indicate the number of inter-frequency 0-8 0 10 Band indicator for DL frequency The band of dl frequency 1-5,7-14,17-28,30-32,33 -43,101 1 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 24 11 Inter-frequ ency The paramet er indicate s the downlin k E-UTRA Absolut e Radio Frequen cy Channel Number (EARFC N) of inter-fre quency. freqBandInd==1[2110-2170], freqBandInd==2[1930-1990], freqBandInd==3[1805-1880], freqBandInd==4[2110-2155], freqBandInd==5[869-894], freqBandInd==7[2620-2690], freqBandInd==8[925-960], freqBandInd==9[1844.9-1879.9], freqBandInd==10[2110-2170], freqBandInd==11[1475.9-1500.9], freqBandInd==12[728-746], freqBandInd==13[746-756], freqBandInd==14[758-768], freqBandInd==17[734-746], freqBandInd==18[860-875], freqBandInd==19[875-890], freqBandInd==20[791 -821], freqBandInd==21[1495.9-1510.9], freqBandInd==22[3510..3590], freqBandInd==23[2180..2200], freqBandInd==24[1525..1559], freqBandInd==25[1930..1995], freqBandInd==26[859..894], freqBandInd==27[852..869], freqBandInd==28[758..803], freqBandInd==30[380-430], freqBandInd==31[1447-1467], freqBandInd==32[1785-1800], freqBandInd==33[1900-1920], freqBandInd==34[2010-2025], freqBandInd==35[1850-1910], freqBandInd==36[1930-1990], freqBandInd==37[1910-1930], freqBandInd==38[2570-2620], freqBandInd==39[1880-1920], freqBandInd==40[2300-2400], freqBandInd==41[2496-2690], freqBandInd==42[3400-3600], freqBandInd==43[3600-3800]， freqBandInd==101[1037-1057] N/A ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 25 12 Switch for removing neighborin g cell the Switch for the LTE adjacent-Cell not being removed No[0],Yes [1] Yes [1] 13 Switch for X2 the Switch for X2 PS HO not being supported No[0],Yes [1] Yes [1] 14 Switch for HO the Switch for both S1 and X2 PS HO not being supported No[0],Yes [1] Yes [1] 15 S1 handover data direct forward supported the enalbe Flag that S1 HO Data Direct Forward can be done No[0],Yes [1] No[0] 16 Uplink center carrier Frequency UL Center carrier frequency (I:1922.4-1977.6, II:1852.4-1907.6, III:1712.4-1782.6, IV:1712.4-1752.6, V:826.4-846.6, VI:832.4-837.6,VII:2502. 4-2567.6, VIII:882.4-912.6, IX:1752.4-1782.4, X:1712.4-1767.6, XI:1430.4-1445.4, XII:701.4-713.6, XIII:779.4-784.6, XIV:790.4-795.6,XIX:83 2.4-842.6,XX:834.4-859. 6,XXI:1450.4-1460.4, XXII:3412.4-3487.6,XXV :1852.4-1912.6,XXVI:81 6.4-846.6)MHz,step 0.2MHz N/A ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 26 17 Downlink center carrier frequency Downlink center carrier frequency (I:2112.4-2167.6, II:1932.4-1987.6, III:1807.4-1877.6, IV:2112.4-2152.6, V:871.4-891.6, VI:877.4-882.6,VII:2622. 4-2687.6, VIII:927.4- 957.6, IX:1847.4-1877.4, X:2112.4-2167.6, XI:1478.4-1493.4, XII:731.4-743.6, XIII:748.4-753.6, XIV:760.4-765.6, XIX:877.4-887.6,XX:793 .4-818.6,XXI:1498.4- 1508.4,XXII:3512.4-358 7.6,XXV:1932.4-1992.6, XXVI:861.4-891.6)MHZ, step 0.2MHZ N/A 18 RNC ID This parameter represents the RNC ID or Extended RNC ID of a FDD UTRAN neighboring cell. When the value of the parameter is in the range of 0 ~ 4095, it represents the RNC ID; When the value of the parameter is in the range of 4096 ~ 65535, it represents the Extended RNC ID. 0-65535 0 19 Cell ID Cell ID [0..65535] 0 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 27 20 Cell primary scrambling code Primary scrambling code [0..127] 0 21 Location Area Code Location area code of a cell [1..65533],[65535..6553 5] It is a Number Text 1 22 Routing Area Code Routing Area Code 0-255 0 23 Band Indicator for FDD DL Frequency Band class of UTRAN FDD cell 0:1,1:2,2:3,3:4,4:5,5:6,6: 7,7:8,8:9,9:10,10:11,11: 12,12:13,13:14,14:19,16 :20,15:21,17:22,18:25,1 9:26 1[0] 24 UTRAN neighbor cell supported PS HO PS HO capbility for UTRAN FDD neighbour cell 0:No,1:Yes Yes 25 Handover support PS Handover enable indication of the UTRAN adjacent-Cell 0: not support;1:support Support 26 UTRAN-fre quency number UTRAN-freque ncy number 0-32 0 27 RAT priority RAT priority 0-255 FDD:[255,2 54,0,0,0,0,0 ], 28 Redirectio n algorithm for coverage This is a switch for the algorithm applied for coverage based redirect. 0:Close 1:Open Open ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 28 4.3 Parameter Configuration Procedure 4.3.1 Pre-Defined Parameters Configuration 1. Configure the correct cell. In the Configuration Management window on the EMS, click Modify Area > Managed Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell. Click the button to add the correct cell. The parameters such as frequency, PCI, and bandwidth must meet the test requirements. Click the button to save the configuration, and synchronize the configuration data to the eNodeB, see Figure 4-1 and Figure 4-2. Figure 4-1 Adding the Cell ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 29 Figure 4-2 Cell Parameter Configuration 2. Add the correct neighbor cell relation by using the neighbor cell configuration tool. In the Configuration Management window on the EMS, click Configuration > Neighbor Cell Management, and configure the correct neighbor cells and neighbor cell relation. Follow the steps shown in Figure 4-3. Figure 4-3 Automatic Neighbor Cell Configuration Tool ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 30 4.3.2 Activate Feature 4.3.2.1 Intra-Site Handover Activation 1. After the neighbor cells are added by using the automatic neighboring cell configuration tool, click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN Neighbor Relation and check whether the intra-site (intra-card or inter-card) handover records exist, see Figure 4-4. Figure 4-4 Neighbor Cell Relation Parameter Configuration 2. Correctly configure the intra-frequency and inter-frequency measurement events. Click Modify Area > Managed Element->Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter, and check the configuration of the intra-frequency and inter-frequency measurement events. Use the default configuration, see Figure 4-5. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 31 Figure 4-5 Measurement Event Configuration 3. For inter-frequency handover, check whether the inter-frequencies are added. In general, the automatic neighbor cell configuration tool automatically adds the inter-frequencies. Click Modify Area > Manged Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter, Configure the Inter-Frequency Number and Inter-Frequency Measurement Configuration, see Figure 4-6, If you want to test inter-frequency handover, the Inter-Frequency Number should not be zero. Figure 4-6 Inter-Frequency Number and Configuration ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 32 4.3.2.2 S1 and X2 Handover Activation 1. After the neighbor cells are added by using the automatic neighbor cell configuration tool, click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Cell Configuration > E-UTRAN Neighbor Cell and click Modify Area-> Manged Element > Radio Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN Neighbor Relation to check whether the inter-site (S1 or X2) handover records exist. 2. Check the parameters configured by the automatic neighbor cell configuration tool. Use the default configuration, see Figure 4-5 and Figure 4-6. 3. Add X2 SCTP for X2 handover. Click Modify Area > Managed Element > Transmission Network > Signaling and Business > SCTP. Click to add the X2 SCTP link, see Figure 4-7. X2AP will be automatically added, see Figure 4-8. Figure 4-7 X2 SCTP Configuration ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 33 Figure 4-8 X2AP Configuration 4. After X2 handover is configured, sometimes S1 handover may also be needed. Delete the X2 connection or disable X2 to perform S1 handover. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN Neighbor Relation. Modify the switch for X2 to No[0], and perform S1 handover, see Figure 4-9. Figure 4-9 Disabling X2 ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 34 4.3.2.3 Inter-RAT Handover Activation 1. For inter-RAT handover (LTE to 3G/2G), add the neighbor cells and configure the neighbor cell relation. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Cell Configuration > UTRAN FDD Neighbor Cell, see Figure 4-10. Click Modify Area-> Managed Element->Radio Parameter -> LTE FDD ->Neighbor Relation Configuration->UTRAN-FDD Neighbor Relation, see Figure 4-11. Figure 4-10 UTRAN-FDD Neighbor Cell Configuration Figure 4-11 UTRAN-FDD Neighbor Cell Relation Configuration ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 35 2. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter to configure the UTRAN frequencies and number in the measurement configuration. The configured frequencies should be the same with the UTRAN-FDD neighbor cells. Set the frequency priority to the default value, see Figure 4-12. Figure 4-12 UTRAN Frequency Number and Parameters 4.3.2.4 Inter-RAT Redirection Activation 1. For inter-RAT redirection based on measurements, configure the inter-RAT neighboring cells, see Figure 4-10. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Relation Configuration > UTRAN-FDD Neighbor Relation to configure the neighbor cell relation, see Figure 4-13. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 36 Figure 4-13 UTRAN-FDD Neighbor Cell Relation Configuration 2. For blind Redirection, configure the redirection frequencies in the measurement configuration, see Figure 4-12. The frequency priority must be non-zero values. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter to configure the RAT priority, see Figure 4-14. Figure 4-14 RAT Priority Configuration 3. Click Modify Area > Managed Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell, and set Redirection Algorithm for Coverage to Open[1], see Figure 4-15. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 37 Figure 4-15 Redirection Switch Configuration 4.3.3 Other Parameter Configuration Procedure 1. For measurement event modification (in general, the default value is acceptable), click Modify Area > Managed Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter to check the event ID, for example, the default values of Open Inter Frequency Measurement Configuration Index are 20 (RSRP, commonly used) and 21 (RSRQ, not used by default, needs to open the dual-measurement switch). Click Modify Area > Managed Element > Radio Parameter > LTE FDD > Measurement Parameter Configuration > UE E-UTRAN Measurement to find the tables whose Measurement Configuration Index are 20 and 21. See Figure 4-16 and Figure 4-17. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 38 Figure 4-16 Event Index Related to Measurement Events Figure 4-17 Parameter Configuration of Measurement Index 4.3.4 Deactivate Feature Click Modify Area > Managed Element > Radio Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN Neighbor Relation, and set Switch for HO to No(0) for all handover deactivation, see Figure 4-18. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 39 Figure 4-18 Deactivating Handover 4.3.5 Data Save and Synchronization 1．After modified the parameters, click to save all the data. 2．Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, then click Synchronize button. 5 Related Counters, KPI and Alarms 5.1 Related Counters Table 5-1 Related Counters SN Counter No. Description 1 C373600000 Number of Successful Outgoing Intra-eNB Intra-freq Handover Preparation ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 40 SN Counter No. Description 2 C373600001 Number of Outgoing Intra-eNB Intra-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 3 C373600002 Number of Outgoing Intra-eNB Intra-freq Handover Preparation Failure due to Dest Preparation Failure 4 C373600003 Number of Outgoing Intra-eNB Intra-freq Handover Preparation Failure due to Other Reason 5 C373600040 Number of Successful Incoming Intra-eNB Intra-freq Handover Preparation 6 C373600041 Number of Incoming Intra-eNB Intra-freq Handover Preparation Failure due to Resource Allocation Fail 7 C373600042 Number of Incoming Intra-eNB Intra-freq Handover Preparation Failure due to Dest Occur Reestblishment 8 C373600043 Number of Incoming Intra-eNB Intra-freq Handover Preparation Failure due to Other Reason 9 C373600080 Number of Successful Outgoing Intra-eNB Intra-freq Handover Execution 10 C373600081 Number of Outgoing Intra-eNB Intra-freq Handover Execution Failure due to Re-estabilshment to Source Cell 11 C373600082 Number of Outgoing Intra-eNB Intra-freq Handover Execution Failure due to Dest Occur Reestblishment 12 C373600083 Number of Outgoing Intra-eNB Intra-freq Handover Execution Failure due to Other Cause 13 C373600084 Number of Successful Incoming Intra-eNB Intra-freq Handover Execution 14 C373600085 Number of Incoming Intra-eNB Intra-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 15 C373600086 Number of Incoming Intra-eNB Intra-freq Handover Execution Failure due to Dest Occur Reestblishment ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 41 SN Counter No. Description 16 C373600087 Number of Incoming Intra-eNB Intra-freq Handover Execution Failure due to Other Cause 17 C373600088 Number of Outgoing Intra-eNB Intra-freq Handover Preparation Failure due to User Inactivity 18 C373600089 Number of Outgoing Intra-eNB Intra-freq Handover Execution Failure due to Waiting Reconfiguration Complete timeout 19 C373610300 Number of Successful Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation 20 C373610301 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to HO Request ACK Timeout 21 C373610302 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Dest Preparation Failure 22 C373610303 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Other Reason 23 C373610304 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 24 C373610340 Number of Successful Incoming Inter-eNB(via X2) Intra-freq Handover Preparation 25 C373610341 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Resource Allocation Fail 26 C373610342 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Source Cancle HO 27 C373610343 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Other Reason 28 C373610380 Number of Successful Outgoing Inter-eNB(via X2) Intra-freq Handover Execution ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 42 SN Counter No. Description 29 C373610381 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Re-estabilshment to Source Cell 30 C373610382 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Execution Failure due to UE Context Release Timeout 31 C373610383 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Other Cause 32 C373610384 Number of Successful Incoming Inter-eNB(via X2) Intra-freq Handover Execution 33 C373610385 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 34 C373610386 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Path Switch Failure 35 C373610387 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Other Cause 36 C373610388 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Source Cancel HO 37 C373610389 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to User Inactivity 38 C373610390 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Preparation Failure due to Re-estabilshment to Target Cell 39 C373610391 Number of Incoming Inter-eNB(via X2) Intra-freq Handover Execution Failure due to Re-estabilshment to Target Cell 40 C373610392 Number of Outgoing Inter-eNB(via X2) Intra-freq Handover Preparation Request 41 C373620600 Number of Successful Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation 42 C373620601 Number of Outgoing Inter-eNB(via S1) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 43 SN Counter No. Description Intra-freq Handover Preparation Failure due to HO Command Timeout 43 C373620602 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Dest Preparation Failure 44 C373620603 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Other Reason 45 C373620604 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 46 C373620640 Number of Successful Incoming Inter-eNB(via S1) Intra-freq Handover Preparation 47 C373620641 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Resource Allocation Fail 48 C373620642 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Source Cancel HO 49 C373620643 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Other Reason 50 C373620680 Number of Successful Outgoing Inter-eNB(via S1) Intra-freq Handover Execution 51 C373620681 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Execution Failure due to Re-estabilshment to Source Cell 52 C373620682 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Execution Failure due to UE Context Release Timeout 53 C373620683 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Execution Failure due to Other Cause 54 C373620684 Number of Successful Incoming Inter-eNB(via S1) Intra-freq Handover Execution 55 C373620685 Number of Incoming Inter-eNB(via S1) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 44 SN Counter No. Description Intra-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 56 C373620686 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Execution Failure due to Source Cancel HO 57 C373620687 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Execution Failure due to Other Cause 58 C373620688 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to User Inactivity 59 C373620689 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Preparation Failure due to Re-estabilshment to Target Cell 60 C373620690 Number of Incoming Inter-eNB(via S1) Intra-freq Handover Execution Failure due to Re-estabilshment to Target Cell 61 C373620691 Number of Outgoing Inter-eNB(via S1) Intra-freq Handover Preparation Request 62 C373630900 Number of Successful Outgoing Intra-eNB Inter-freq Handover Preparation 63 C373630901 Number of Outgoing Intra-eNB Inter-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 64 C373630902 Number of Outgoing Intra-eNB Inter-freq Handover Preparation Failure due to Dest Preparation Failure 65 C373630903 Number of Outgoing Intra-eNB Inter-freq Handover Preparation Failure due to Other Reason 66 C373630940 Number of Successful Incoming Intra-eNB Inter-freq Handover Preparation 67 C373630941 Number of Incoming Intra-eNB Inter-freq Handover Preparation Failure due to Resource Allocation Fail 68 C373630942 Number of Incoming Intra-eNB Inter-freq Handover Preparation Failure due to Dst occur Re-establishment 69 C373630943 Number of Incoming Intra-eNB Inter-freq ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 45 SN Counter No. Description Handover Preparation Failure due to Other Reason 70 C373630980 Number of Successful Outgoing Intra-eNB Inter-freq Handover Execution 71 C373630981 Number of Outgoing Intra-eNB Inter-freq Handover Execution Failure due to Re-estabilshment to Source Cell 72 C373630982 Number of Outgoing Intra-eNB Inter-freq Handover Execution Failure due to Dst occur Re-establishment 73 C373630983 Number of Outgoing Intra-eNB Inter-freq Handover Execution Failure due to Other Cause 74 C373630984 Number of Successful Incoming Intra-eNB Inter-freq Handover Execution 75 C373630985 Number of Incoming Intra-eNB Inter-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 76 C373630986 Number of Incoming Intra-eNB Inter-freq Handover Execution Failure due to Dst occur Re-establishment 77 C373630987 Number of Incoming Intra-eNB Inter-freq Handover Execution Failure due to Other Cause 78 C373630988 Number of Outgoing Intra-eNB Inter-freq Handover Preparation Failure due to User Inactivity 79 C373630989 Number of Outgoing Intra-eNB Inter-freq Handover Execution Failure due to Waiting Reconfiguration Complete Timeout 80 C373641200 Number of Successful Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation 81 C373641201 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to HO Request ACK Timeout 82 C373641202 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Dest Preparation Failure ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 46 SN Counter No. Description 83 C373641203 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Other Reason 84 C373641204 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 85 C373641240 Number of Successful Incoming Inter-eNB(via X2) Inter-freq Handover Preparation 86 C373641241 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Resource Allocation Fail 87 C373641242 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Source Cancel HO 88 C373641243 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Other Reason 89 C373641280 Number of Successful Outgoing Inter-eNB(via X2) Inter-freq Handover Execution 90 C373641281 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Re-estabilshment to Source Cell 91 C373641282 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Execution Failure due to UE Context Release Timeout 92 C373641283 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Other Cause 93 C373641284 Number of Successful Incoming Inter-eNB(via X2) Inter-freq Handover Execution 94 C373641285 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 95 C373641286 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Path Switch Failure ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 47 SN Counter No. Description 96 C373641287 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Other Cause 97 C373641288 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Source Cancel HO 98 C373641289 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to User Inactivity 99 C373641290 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Preparation Failure due to Re-estabilshment to Target Cell 100 C373641291 Number of Incoming Inter-eNB(via X2) Inter-freq Handover Execution Failure due to Re-estabilshment to Target Cell 101 C373641292 Number of Outgoing Inter-eNB(via X2) Inter-freq Handover Preparation Request 102 C373651500 Number of Successful Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation 103 C373651501 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to HO Command Timeout 104 C373651502 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Dst Preparation Failure 105 C373651503 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Other Reason 106 C373651504 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Re-estabilshment to Source Cell 107 C373651540 Number of Successful Incoming Inter-eNB(via S1) Inter-freq Handover Preparation 108 C373651541 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Resource Allocation Fail 109 C373651542 Number of Incoming Inter-eNB(via S1) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 48 SN Counter No. Description Inter-freq Handover Preparation Failure due to Source Cancel HO 110 C373651543 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Other Reason 111 C373651580 Number of Successful Outgoing Inter-eNB(via S1) Inter-freq Handover Execution 112 C373651581 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Execution Failure due to Re-estabilshment to Source Cell 113 C373651582 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Execution Failure due to UE Context Release Timeout 114 C373651583 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Execution Failure due to Other Cause 115 C373651584 Number of Successful Incoming Inter-eNB(via S1) Inter-freq Handover Execution 116 C373651585 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Execution Failure due to RRC Reconfig Complete Timeout 117 C373651586 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Execution Failure due to Source Cancel HO 118 C373651587 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Execution Failure due to Other Cause 119 C373651588 Number of Outgoing Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to User Inactivity 120 C373651589 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Preparation Failure due to Re-estabilshment to Target Cell 121 C373651590 Number of Incoming Inter-eNB(via S1) Inter-freq Handover Execution Failure due to Re-estabilshment to Target Cell 122 C373651591 Number of Outgoing Inter-eNB(via S1) ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 49 SN Counter No. Description Inter-freq Handover Preparation Request 5.2 Related KPI Table 5-2 Related KPI SN KPI No. Description 1 340031 Number of Outgoing Intra-RAT Intra-freq Handover Preparation Failure(Re-estabilshment to Source Cell) 2 340032 Number of Outgoing Intra-RAT Intra-freq Handover Preparation Failure(Dest Preparation Failure) 3 340033 Number of Outgoing Intra-RAT Intra-freq Handover Preparation Failure(User Inactivity) 4 340034 Number of Outgoing Intra-RAT Intra-freq Handover Preparation Failure(HO Request Ack Timeout) 5 340035 Number of Outgoing Intra-RAT Intra-freq Handover Preparation Failure(Other Reason) 6 340040 Number of Successful Incoming Intra-RAT Intra-freq Handovers Preparation 7 340041 Number of Incoming Intra-RAT Intra-freq Handover Preparation Failure(Resource Allocation Fail) 8 340042 Number of Incoming Intra-RAT Intra-freq Handover Preparation Failure(Dest Occur Reestblishment) 9 340043 Number of Incoming Intra-RAT Intra-freq Handover Preparation Failure(Source Cancle HO) 10 340044 Number of Incoming Intra-RAT Intra-freq Handover Preparation Failure(Other Reason) 11 340046 Number of Successful Incoming Intra-RAT Intra-freq Handovers Execution 12 340047 Number of Outgoing Intra-RAT Inter-freq Handover Preparation ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 50 SN KPI No. Description Failure(Re-estabilshment to Source Cell) 13 340048 Number of Outgoing Intra-RAT Inter-freq Handover Preparation Failure(Dest Preparation Failure) 14 340049 Number of Outgoing Intra-RAT Inter-freq Handover Preparation Failure(User Inactivity) 15 340050 Number of Outgoing Intra-RAT Inter-freq Handover Preparation Failure(HO Request Ack Timeout) 16 340051 Number of Outgoing Intra-RAT Inter-freq Handover Preparation Failure(Other Reason) 17 340053 Number of Successful Incoming Intra-RAT Inter-freq Handovers Preparation 18 340054 Number of Incoming Intra-RAT Inter-freq Handover Preparation Failure(Resource Allocation Fail) 19 340055 Number of Incoming Intra-RAT Inter-freq Handover Preparation Failure(Dest Occur Reestblishment) 20 340056 Number of Incoming Intra-RAT Inter-freq Handover Preparation Failure(Source Cancle HO) 21 340057 Number of Incoming Intra-RAT Inter-freq Handover Preparation Failure(Other Reason) 22 340059 Number of Successful Incoming Intra-RAT Inter-freq Handovers Execution 23 340060 Success Rate of Intra-RAT Intra-freq Cell Incoming Handover 24 340061 Success Rate of Intra-RAT Inter-freq Cell Incoming Handover 5.3 Related Alarms No. ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 51 6 Abbreviations 1xRRT CDMA2000 1x Radio Transmission Technology 3GPP 3rd Generation Partnership Project BCCH Broadcast Control Channel CCO Cell Change Order CDMA2000 Code Division Multiple Access 2000 CIO Cell Individual Offset CS Circuit-Switched CSG Closed Subscriber Group DL Downlink DRX Discontinuous Reception eNodeB E-UTRAN NodeB EPLMN Equivalent PLMN E-UTRAN Evolved Universal Terrestrial Radio Access Network FDD Frequency Division Duplex GERAN GSM EDGE Radio Access Network GSM Global System for Mobile Communications HRPD High Rate Packet Data HPLMN Home PLMN ID Identity IMSI International Mobile Subscriber Identity LTE Long-Term Evolution MIB Master Information Block MME Mobility Management Entity NAS Non Access Stratum PS HO Packet-switched handover PLMN Public Land Mobile Network ZTE LTE FDD Handover Feature Guide ZTE Confidential Proprietary © 2013 ZTE CORPORATION. All rights reserved. 52 RAT Radio Access Technology RSRP Reference Signal Received Power RSRQ Reference Signal Received Quality SGW Serving GateWay SIB System Information Block SIM Subscriber Identity Module SRVCC Single Radio Voice Call Continuity TA Timing Advance TA Tracking Area USIM Universal Subscriber Identity Module UE User Equipment UTRAN Universal Terrestrial Radio Access Network UL Uplink VPLMN Visited PLMN