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LTE Call Processing and Handover

Sitha Sok
Sitha Sok

•CPS (Call Processing Software): LTE Control & Bearer Protocol processing •OAM (Operation and Maintenance): eNB Operation and Maintenance •MW (Middleware): IPC and Redundancy function •IPRS (IP Routing Software): Routing protocol operation •NP SW (Network Processor Software): Packet forwarding function •OS (Operating System): Embedded Linux •DD (Device Driver): initializing and setting the devices

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1/73
Customer Training Center
Jaeho, Lee
Distribution
EnglishED01
2/73
CALL S/W Overview
3/73
Network Architecture
UTRAN
GERAN
SGSN
MME
E-UTRANUE
Serving
Gateway
HSS
LTE-Uu
S1-U
S1-MME
S3
S6a
S11
S10
S4
S12
PDN
Gateway
PCRF
Operator’s IP
Services
Ex) IMS. PSS etc
S5 SGi
Gx
Rx
LTE Network Architecture
4/73
Protocol Stack
UE Control Plane
UE User Plane
L1
MAC
RLC
PDCP
RRC
NAS
L1
MAC
RLC
PDCP
RRC
L1
L2
IP
SCTP
S1-AP
Relay
L1
L2
IP
SCTP
S1-AP
L1
L2
IP
UDP
GTP-C
L1
L2
IP
UDP
GTP-C
L1
L2
IP
UDP
GTP-C
L1
L2
IP
UDP
GTP-C
NAS
LTE-Uu S1-MME S11 S5/S8a
UE eNB MME S-GW P-GW
SGi
L1
MAC
RLC
PDCP
IP
App
L1
MAC
RLC
PDCP
L1
L2
UDP/IP
GTP-U
Relay
LTE-Uu S1-U S5/S8
L1
L2
UDP/IP
GTP-U
L1
L2
UDP/IP
GTP-U
Relay
L1
MAC
UDP/IP
GTP-U
IP
UE eNB S-GW P-GW
5/73
eNB Software Architecture
• CPS (Call Processing Software): LTE Control & Bearer Protocol processing
• OAM (Operation and Maintenance): eNB Operation and Maintenance
• MW (Middleware): IPC and Redundancy function
• IPRS (IP Routing Software): Routing protocol operation
• NP SW (Network Processor Software): Packet forwarding function
• OS (Operating System): Embedded Linux
• DD (Device Driver): initializing and setting the devices
6/73
Call Software Blocks (1/3)
ECCB
GTPB
PDCB
RLCB
MACB
Other eNB
EPC
PHY
UE
S1-c
X2-c
S1-u
X2-u
ECS (eNB Control
Subsystem)
EDS (eNB Data
Subsystem)
LTE eNB
LEGEND :
(UDP port)Control (IPC)
Traffic
SCTB
ECMM
ESCM
ERCM
ERRM
ECCM
EHCM
Uu
ECCB
ECMB
Interface
Ad

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LTE Call Processing and Handover

  • 1. 1/73 Customer Training Center Jaeho, Lee Distribution EnglishED01
  • 4. 4/73 Protocol Stack UE Control Plane UE User Plane L1 MAC RLC PDCP RRC NAS L1 MAC RLC PDCP RRC L1 L2 IP SCTP S1-AP Relay L1 L2 IP SCTP S1-AP L1 L2 IP UDP GTP-C L1 L2 IP UDP GTP-C L1 L2 IP UDP GTP-C L1 L2 IP UDP GTP-C NAS LTE-Uu S1-MME S11 S5/S8a UE eNB MME S-GW P-GW SGi L1 MAC RLC PDCP IP App L1 MAC RLC PDCP L1 L2 UDP/IP GTP-U Relay LTE-Uu S1-U S5/S8 L1 L2 UDP/IP GTP-U L1 L2 UDP/IP GTP-U Relay L1 MAC UDP/IP GTP-U IP UE eNB S-GW P-GW
  • 5. 5/73 eNB Software Architecture • CPS (Call Processing Software): LTE Control & Bearer Protocol processing • OAM (Operation and Maintenance): eNB Operation and Maintenance • MW (Middleware): IPC and Redundancy function • IPRS (IP Routing Software): Routing protocol operation • NP SW (Network Processor Software): Packet forwarding function • OS (Operating System): Embedded Linux • DD (Device Driver): initializing and setting the devices
  • 6. 6/73 Call Software Blocks (1/3) ECCB GTPB PDCB RLCB MACB Other eNB EPC PHY UE S1-c X2-c S1-u X2-u ECS (eNB Control Subsystem) EDS (eNB Data Subsystem) LTE eNB LEGEND : (UDP port)Control (IPC) Traffic SCTB ECMM ESCM ERCM ERRM ECCM EHCM Uu ECCB ECMB Interface
  • 7. 7/73 Call Software Blocks (2/3) ECMB (eNB Common Management Block) Initiate eNB and set the common channel Transmit system information for initiating UE Load Control for cell and system overload ECCB (eNB Call Control Block) Radio Resource Management, Call Admission Control RRC/S1-AP ASN.1 Interface, X2-AP ASN.1 Interface Control the basic call access, S1-AP Paging, Handover call control, Call Trace SCTB (Stream Control Transmission protocol Block) S1-C/X2-C SCTP Interface (Association setup/release), S1/X2 AP message Transmission
  • 8. 8/73 Call Software Blocks (3/3) GTPB (GPRS Tunneling Protocol Block) GPRS(General Packet Radio Service) Tunneling Protocol for data access on S1-U or X2-U. PDCB (Packet Data Convergence protocol Block) Header compression and decompression on IP packet stream, Ciphering, Integrity DL/UL data forwarding on Handover PDCP sequence number maintenance, Timer based PDCP SDU discard RLCB (Radio Link Control Block) Radio Link control and ARQ(Automatic Repeat Request) RLC SDU concatenation/segmentation/reassemble, In sequence delivery, RLC re- establishment RLC PDU re-segmentation, Paging MACB (Medium Access Control Block)
  • 9. 9/73 Main ID and S1/X2 Procedure
  • 11. 11/73 E-UTRAN Identifiers (2/3) UE-Related ID on S1 (for UE-associated signaling) UE-Related ID on X2 (for X2 Handover)
  • 13. 13/73 S1 Interface: Procedures (1/2) Class 1 Procedures Sender expects response from receiver
  • 14. 14/73 S1 Interface: Procedures (2/2) Class 2 Procedures Sender does not expect response
  • 15. 15/73 X2 Interface: Procedures Class 1 Procedures Class 2 Procedures
  • 17. 17/73 S1 Setup between eNB and MME Objective To setup the S1AP connection Exchange configuration information
  • 18. 18/73 X2 Setup between eNB and eNB Objective To setup the X2AP connection Exchange configuration information Neighbor PCI info is exchanged for supporting Automatic PCI Selection
  • 19. 19/73 Attach Procedure (1/2) UE Source eNB MME S-GW EPC 4. Initial UE Message(+ Attach Requet) NAS procedure( Nas security, Authentication ) 7. Initial Context Setup Request (+ Attach Accept) 2. RRC Connection Setup 1. RRC Connection Request 3. RRC Connection Setup Complete 5. Create Session Request 6. Create Session Response
  • 20. 20/73 Attach Procedure (2/2) UE Source eNB MME S-GW EPC 10. UE Capbility Info Indication 13. RRC Connection Reconfiguration 8. UE Capability Enquiry 9. UE Capability Information 12. Security Mode Complete 11. Security Mode Command 14. RRC Connection Reconfiguration Complete 15. Initial Context Setup Response 18. Modify Bearer Request 19. Modify Bearer Response 16. Uplink Information Transfer 17. Uplink NAS Transport Uplink Data
  • 21. 21/73 Detach Procedure(1/2) – w/o RRC Connection UE Source eNB MME S-GW EPC 4. Initial UE Message(+ Detach Requet) 9. UE Context Release Command 2. RRC Connection Setup 1. RRC Connection Request 3. RRC Connection Setup Complete (+ Detach Request) 6. Delete Session Response 7. Downlink NAS Transport (+ Detach Accept) 8. Downlink Information Transfer(+ Detach Accept) 10. RRC Connection Release 11. UE Context Release Complete 5. Delete Session Request
  • 22. 22/73 Detach Procedure (2/2) – w RRC Connection UE Source eNB MME S-GW EPC 2. Uplink NAS Transport(+ Detach Requet) 7. UE Context Release Command 1. Uplink Information Transfer (+ Detach Request) 4. Delete Session Response 5. Downlink NAS Transport (+ Detach Accept) 6. Downlink Information Transfer(+ Detach Accept) 8. RRC Connection Release 9. UE Context Release Complete 3. Delete Session Request
  • 23. 23/73 LTE Measurement Report Events Intra-LTE measurement events Event A1 - Serving becomes better than threshold. => release the measurement gap. Event A2 - Serving becomes worse than threshold. => setup measurement gap. Event A3 - Neighbour becomes offset better than serving. => trigger Intra-LTE handover => execute ANR Event A4 - Neighbour becomes better than threshold. Event A5 - Serving becomes worse than threshold1 and neighbour becomes better than threshold2. Inter-RAT measurement events Event B1 - Inter RAT neighbour becomes better than threshold. Event B2 - Serving becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2. => trigger Inter-RAT handover
  • 24. 24/73 Measurement Signaling & Info MeasurementReport UE EUTRAN Measurement Reporting from the UE Measurement Report message has Physical Cell Id (PCI) info of neighbor cell. Execute handover using PCI of Measurement Report message received from eNB. In case of neighbor cell of CDMA2000, preRegistrationStatusHRPD information is included requested interworking- HRPD. Cell Global Id (CGI) information is included as requested from eNB. ANR function is executed using CGI information from UE on eNB.
  • 25. 25/73 Handover Classification Intra-RAT Handover Intra-eNB Handover Inter-eNB Handover over X2 Inter-eNB Handover over S1 (Intra-MME) Inter-eNB Handover over S1 (Inter-MME) Inter-RAT Handover CDMA2000, GERAN, UTRA, etc.
  • 28. 28/73 Handover Procedure [measurement] RSRP [dBm] : Reference Signal Received Power Absolute value, not related to Payload RSSI [dBm] : Received Signal Strength Indicator Received power of center 6RB (1.08MHz) Directly proportional to Payload RSRQ [dB] : RSRP/RSSI ratio Inversely proportional to Payload – Using for handover of cell loading frequency 0 RSSI [dBm] : 6RB power (6RB=72subcarrier=1.08MHz) BW = 10MHz RSRP [dBm] : carrier powerRS carrier data carrier
  • 30. 30/73 Intra-LTE / Inter-eNB X2 Handover UE Source eNB MME S-GW EPC 1. MeasurementReport Target eNB Downlink/Uplink data Downlink/Uplink data 3. HANDOVER REQUEST ACKNOWLEDGE 5. SN STATUS TRANSFER 4. RRCConnection- Reconfiguration (mobilityControlinfo) Data forwarding 6. Synchronization/UL allocation and timing advance 7. RRCConnectionReconfigurationComplete Forwarded data Uplink data Forwarded data Downlink data Down/Uplink data Down/Uplink data Uplink data Downlink data 8. PATH SWITCH REQUEST 9. Modify Bearer Request End marker End marker 10. Modify Bearer Response11. PATH SWITCH REQUEST ACKNOWLEDGE 12. UE CONTEXT RELEASE 2. HANDOVER REQUEST
  • 31. 31/73 Intra-LTE / Inter-eNB S1 Handover (1/2) UE Source eNB MME S-GW EPC Target eNB Downlink/Uplink data Downlink/Uplink data 3. HANDOVER REQUEST 5. Create Indirect Data Forwarding Tunnel Request 8. RRCConnection- Reconfiguration (mobilityControlinfo) 1) Direct data forwarding 1. Decision to trigger a relocation via S1 2. HANDOVER REQUIRED Indirect data forwarding 6. Create Indirect Data Forwarding Tunnel Response 7. HANDOVER COMMAND 9. eNB STATUS TRANSFER 10. MME STATUS TRANSFER 2) Indirect data fowarding 11. Detach from old cell/Synchronize to new cell 12. RRCConnectionReconfigurationComplete Forwarded data Uplink data Uplink data 4. HANDOVER REQUEST ACKNOWLEDGE
  • 32. 32/73 Intra-LTE / Inter-eNB S1 Handover (2/2) UE Source eNB MME S-GW EPC Target eNB Downlink data Downlink data End marker End marker 13. HANDOVER NOTIFY 14. Modify Bearer Request 15. Modify Bearer Response Forwarded data 16. Tracking Area Update procedure 17. UE CONTEXT RELEASE COMMAND 18. UE CONTEXT RELEASE COMPLETE 19. Delete Indirect Data Forwarding Tunnel Request 20. Delete Indirect Data Forwarding Tunnel Response Downlink/Uplink data Downlink/Uplink data
  • 34. 34/73 MME Configuration (1/2) CHG-MME-CONF : Setup information related MME Input the MME’s status connected S1 interface CLI Command
  • 35. 35/73 SRB RLC Configuration (1/2) CHG-SRB-QCI : Setup QoS information on SRB CLI Command
  • 36. 36/73 SRB RLC Configuration (2/2) CHG-SRB-RLC : Setup RLC information on SRB CLI Command The timer is for the prohibition of transmission of STATUS_STATUS on received-Entity(AM_RLC)
  • 37. 37/73 SRB MAC Configuration (1/4) CHG-LOCH-INF : Setup Logical channel information per QCI CLI Command
  • 38. 38/73 SRB MAC Configuration (2/4) CHG-TRCH-INF : Setup Transport channel information per Cell CLI Command Marking cell index for changing or displaying
  • 39. 39/73 SRB MAC Configuration (3/4) CHG-DRX-INF : Setup DRX information per Cell CLI Command
  • 40. 40/73 SRB MAC Configuration (4/4) CHG-DPHY-SPS Change parameters for the operating of Dedicated semiPersistScheduling. Cell_NUM : 0 ~ 5 PO_NOMINAL_PUSCHPERSISTENT: SPS Po parameter using power control is -126 ~ 24, default: -80 PO_UEPUSCHPERSISTENT: SPS Po parameter’s range on Power control per UE: - 8 ~7, default: 0 CHG-DPHY-PUSCH Change parameters for Dedicated PUSCH operaiton. Cell NUM: 0 ~ 5 BETA_OFFSET_ACKINDEX: Set the value of multiplexing ACK/NACK and PUSCH. Range: 0 ~ 15, default: 8 BETA_OFFSET_RIINDEX: Set the value of multiplexing RI and PUSCH Range: 0 ~ 15, default: 5 BETA_OFFSET_CQIINDEX: Set the value of multiplexing CQI and PUSCH Range: 0 ~ 15, default: 11
  • 41. 41/73 SRB MAC Configuration (4/4) CHG-ULPWR-CTRL Change parameters for the operating of Dedicated Uplink Power Control. Cell Number: 0 ~5 PO_UE_PUSCH: non-persistent scheduling Po parameter using PUSCH Power control per UE. Range: -8 ~ 7, default: 0 DELTA_MCSENABLED: Usage possibility for different MCS on Power offset Range: ci_en0/ci_en1/, default: ci_en0 ACCUMULATION_ENABLE: TPC Mode(accumulation mode/absolute mode) Range: 0 ~ 1, default: 1(accumulation mode) PO_UE_PUCCH: Po parameter(-8 ~ 7), default: 0 P_SRSOFFSET: This index is indicating the power offset of PUSCH and SRS: 0~15, default:7
  • 42. 42/73 SRB MAC Configuration (4/4) CHG-CQI-REPORTING Change parameters for the operating CQI Reporting TRANSMISSION_MODE: ci_tm1,2,3,4, ~ 8. default null – Mode 1: Single antenna port, port 0 – Mode 2: Transmit diversity – Mode 3: Large-delay CDD – Mode 4: Closed-loop spatial multiplexing – Mode 5: MU-MIMO – Mode 6: Closed-loop spatial multiplexing, single layer – Mode 7: Single antenna port, UE-specific RS (port 5) – Mode 8 (new in Rel-9): Single or dual-layer transmission with UE-Specific RS Port 7 and/or 8 Select CQI on Wideband/subband.
  • 43. 43/73 SRB MAC Configuration (4/4) CHG-DPHY-ULSRS Change the parameters for operating of Dedicated Uplink RS. Cell_NUM: 0 ~ 5 SRS_HOPPING_BANDWIDTH: Set the Area that is became “hopping status of Sounding RS. ci_hbw0 ~ hbw3, default: ci_hbw0 DURATION: Set the duration of sounding RS. If the value is ‘True’, the transmission of Sounding RS is not stopped until disabled. If the value is ‘False’ , transmit one time. (Range: 0 ~1), default vlalue: 1 CHG-DPHY-SR Change the parameters for operating of Dedicated Scheduling Request. Cell NUM: 0 ~5 DSR_TRANS_MAX: Set the maximum transmittable counts of scheduling requests until received PUSCH resource on UE.(ci_dsr_TransMax_n4 ~ 8,16,32,64) , default value: ci_dsr_TransMax_n64
  • 44. 44/73 DRB PDCP Configuration (1/3) CHG-PDCP-INF : Set the PDCP information per QCI CLI Command
  • 45. 45/73 DRB PDCP Configuration (2/3) CHG-ROHC-INF : Setup ROHC information per QCI CLI Command
  • 46. 46/73 DRB PDCP Configuration (3/3) CHG-SECU-INF : Set the Security Algorithm information CLI Command
  • 47. 47/73 DRB RLC Configuration CHG-RLC-INF : Set the RLC information per QCI CLI Command
  • 49. 49/73 Neighbor Configuration (1/7) The value is different for opeartors. Input PLMN Id of eNB operator. Input the value same as PLMN ID of eNB. Creation EUTRA Neighbor – PLD update or manually input with CLI on LSM CLI Command Create information of E-UTRA cells located near a base station
  • 50. 50/73 Neighbor Configuration (2/7) Parameter Description Range Value Cell Num Cell number of Base Station 0~5 - Relation Index Relation Index - - Status Neighbor status EQUIP or N_EQUIP N_EQUIP eNB ID Neighbor eNB Identity 20 or 28 BITS - Local Cell ID Neighbor local cell ID 0 ~ 255 - eNB Type Neighbor eNB type Macro or Home Macro eNB MCC Mobile Country Code of Neighbor eNB - Ex) Korea: 450 eNB MNC Mobile Network Code of Neighbor eNB - Physical Cell ID Neighbor cell PCI 0 ~ 503 - TAC Neighbor cell TAC 2 BYTES - PLMNs PLMN Lists supported neighbor cell - -
  • 51. 51/73 Neighbor Configuration (3/7) Parameter Description Range Value EARFCN UL Uplink EARFCN 0 ~ 65535 - EARFCN DL Downlink EARFCN 0 ~ 65535 - Bandwidth UL Uplink Bandwidth n6, n15, n25, n50, n75, n100 It’s different per operators. Bandwidth DL Downlink Bandwidth n6, n15, n25, n50, n75, n100 It’s different per operators. Individual Offset Cell Individual Offset adaptable neighbor cell. dB-24, dB-22, dB-20, dB-18, dB-16, dB-14, dB-12, dB-10, dB-8, dB-6, dB-4, dB-2, dB-1, dB0, dB1, dB2, dB3, dB4, dB5, dB6, dB8, dB10, dB12, dB14, dB16 dB18, dB20, dB22, dB24 dB0 Qoffset Cell Cell Quality Offset adaptable neighbor cell. Same dB0 Is Remove Allowed Whether or not delete the neighbor cell TRUE or FALSE TRUE Is Handover Allowed Whether or not handover to neighbor cell TRUE of FALSE TRUE
  • 52. 52/73 Neighbor Configuration (4/7) CDMA2000 1xRTT Neighbor creation – input remote neighbor widow or CLI CLI Command Create the information of CDMA2000 1xRTT Cells located near by a base station
  • 53. 53/73 Neighbor Configuration (5/7) Parameter Description Range Value Cell Num Cell number in base station 0~5 - Relation Index Relation Index - - Status Neighbor status EQUIP or N_EQUIP N_EQUIP SID CDMA2000 1xRTT SID 0 ~ 32767 - NID CDMA2000 1xRTT NID 0 ~ 65535 - Base ID CDMA2000 1xRTT Base ID 0 ~ 65535 - Band Class CDMA2000 1xRTT Band Class bc0, bc1, bc2, bc3, bc4, bc5, bc6, bc7, bc8, bc9, bc10, bc11, bc12, bc13, bc14, bc15, bc16, bc17 - ARFCN Neighbor cell’s ARFCN 0 ~ 2047 - PN Offset Neighbor cell’s PN Offset (CDMA2000’s PCI) 0 ~ 511 - Is Remove Allowed Whether or not delete the neighbor cell TRUE or FALSE TRUE Is Handover Allowed Whether or not handover to neighbor cell TRUE of FALSE TRUE
  • 54. 54/73 Neighbor Configuration (6/7) Creation CDMA2000 HRPD Neighbor – input remote neighbor widow or CLI CLI Command Create the information of CDMA2000 HRPD Cells located near by a base station
  • 55. 55/73 Neighbor Configuration (7/7) Parameter Description Range Value Cell Num Cell number in base station 0~5 - Relation Index Relation Index - - Status Neighbor status EQUIP or N_EQUIP N_EQUIP Color Code Neighbor Cell’s Color Code 0 ~ 255 - BSM ID Neighbor Cell’s BSM ID 0 ~ 63 - BSC ID Neighbor Cell’s BSC ID 0 ~ 1 - DPSS ID Neighbor Cell’s DPSS ID 0 ~ 7 - BTS ID Neighbor Cell’s BTS ID 0 ~ 2047 - Sector ID Neighbor Cell’s Sector ID 0 ~ 7 - Band Class Neighbor Cell’s Band Class bc0, bc1, bc2, bc3, bc4, bc5, bc6, bc7, bc8, bc9, bc10, bc11, bc12, bc13, bc14, bc15, bc16, bc17 - ARFCN Neighbor Cell’s ARFCN 0 ~ 2047 - PN Offset Neighbor Cell’s PN Offset (CDMA2000’s PCI) 0 ~ 511 - Is Remove Allowed Whether or not delete the neighbor cell TRUE or FALSE TRUE Is Handover Allowed Whether or not handover to neighbor cell TRUE of FALSE TRUE
  • 57. 57/73 Handover Event Configuration – Event A3 (1/3) Event A3 : Use for Intra LTE Handover and SON ANR - A3PurposeInraLteHandover - A3PurposeReportStrongestCells - Unit: dBm - Actual value: PLD value * 0.5 - RSRP or RSRQ - sameAsTriggerQuantity or both Change EUTRA A3 Criteria information CLI Command
  • 58. 58/73 Handover Event Configuration – Event A3 (2/3) Parameter Description Range Value Cell Num Cell number in base station 0~5 N/A Purpose The purpose of Event A3 usage 0: A3PurposeIntraLteHandov er 1: A3ReportStrongestCells 2: A3PurposeSpare_1 3: A3PurposeSpare_2 N/A Active State The status of Event A3 0: Inactive 1: Active Active A3 Offset RSRP threshold value using the condition of EUTRA measurement report triggering for Event A3 . (unit: dBm) -30 ~ 30 4 A3 Report On Leave Whether or not to report in case of Event A3 leaving condition TRUE or FALSE FALSE Hysteresis The entry/leave condition on Event triggered reporting. (unit: dB) 0 ~ 30 0
  • 59. 59/73 Handover Event Configuration – Event A3 (3/3) Parameter Description Range Value Time To Trigger The sufficient time in specific criteria when UE try to trigger the measurement report . (unit: ms) ms0, ms40, ms64, ms80, ms100, ms128, ms160, ms256, ms320, ms480, ms512, ms640, ms1024, ms1280, ms2560, ms5120 ms480 Trigger Quantity The quantity information used for evaluating the triggering condition for Events. RSRP or RSRQ RSRP Report Quantity The quantity information including Measurement Report Message. SamsAsTriggerQuantity or Both SameAsTriggerQuantity Max Report Cell The maximum number of cell including Measurement report on UE. 1 ~ 8 8 Report Interval The interval information between Periodical reports. (unit: ms) ms120, ms240, ms480, ms640, ms1024, ms2048, ms5120, ms10240, min1, min6, min12, min30, min60, ms240 Report Amount The number of messages on Measurement report. r1, r2, r4, r8, r16, r32, r64, infinity r8
  • 60. 60/73 Handover Event Configuration – Event B2 (1/4) Event B2 : Usage for Inter RAT(CDMA2000 1xRTT) Handover CLI Command Change CDMA2000 1xRTT B2 Criteria Information
  • 61. 61/73 Handover Event Configuration – Event B2 (2/4) Event B2 : Usage for Inter RAT(CDMA2000 HRPD) Handover CLI Command Change CDMA2000 HRPD B2 Criteria Information
  • 62. 62/73 Handover Event Configuration – Event B2 (3/4) Parameter Description Range Value Cell Num Cell number in base station 0~5 N/A Purpose The purpose of Event B2 Usage 0: B2PurposeInterRatHandover 1: B2PurposeSpare_1 3: B2PurposeSpare_2 N/A Active State The status of Event B2 0: Inactive 1: Active Active B2 Threshold1 (RSRP) RSRP threshold value using the condition of EUTRA measurement report triggering for Event B2 . 0 ~ 97 70 B2 Threshold1 (RSRQ) RSRP threshold value using the condition of EUTRA measurement report triggering for Event B2. 0 ~ 34 10 B2 Threshold2 CDMA 2000 The threshold value using the condition of CDMA2000 HRPD measurement report triggering for Event B2. 0 ~ 63 20 Hysteresis The entry/leave condition on Event triggered reporting. (unit: dB) 0 ~ 30 0
  • 63. 63/73 Handover Event Configuration – Event B2 (4/4) Parameter Description Range Value Time To Trigger The sufficient time in specific criteria when UE try to trigger the measurement report. (unit: ms) ms0, ms40, ms64, ms80, ms100, ms128, ms160, ms256, ms320, ms480, ms512, ms640, ms1024, ms1280, ms2560, ms5120 ms80 Max Report Cell The maximum number of cell including Measurement report on UE. 1 ~ 8 1 Report Interval The interval information between Periodical reports. (unit: ms) ms120, ms240, ms480, ms640, ms1024, ms2048, ms5120, ms10240, min1, min6, min12, min30, min60, ms240 Report Amount The number of messages on Measurement report. r1, r2, r4, r8, r16, r32, r64, infinity r1 Trigger Quantity EUTRA The quantity information used for evaluating the condition of EUTRA event triggering. RSRP or RSRQ RSRP
  • 64. 64/73 Periodic Report Configuration – Periodic (1/4) Periodic Report : Usage for ICIC, SON ANR. CLI Command Change EUTRA Periodic Criteria Information
  • 65. 65/73 Periodic Report Configuration – Periodic (2/4) Periodic Report : Usage for interworking CDMA2000 1xRTT in the future. Change CDMA2000 1xRTT Periodic Criteria Information CLI Command
  • 66. 66/73 Periodic Report Configuration – Periodic (3/4) Periodic Report: Usage for interworking CDMA2000 HRPD in the future. CLI Command Change CDMA2000 HRPD Periodic Criteria Information
  • 67. 67/73 Periodic Report Configuration – Periodic (4/4) Parameter Description Range Value Purpose The purpose of configuration on Periodic measurement reporting. PeriodicalPurposeReportStrongestCells PeriodicalPurposeReportStrongestCellsForSON PeriodicalPurposeReportCGI N/A Active State The operation status of Periodic report. 0: Inactive 1: Active Inactive Trigger Quantity (EUTRA Only) The quantity information for evaluating the triggering condition for event. RSRP or RSRQ RSRP Report Quantity (EUTRA Only) The quantity information including Measurement report message. SamsAsTriggerQuantity or Both SameAsTrigg erQuantity Max Report Cell The maximum number of cell including Measurement report on UE. 1 ~ 8 1 Report Interval The interval information between Periodical reports. (unit: ms) ms120, ms240, ms480, ms640, ms1024, ms2048, ms5120, ms10240, min1, min6, min12, min30, min60, ms240 Report Amount The number of messages on Measurement report. r1, r2, r4, r8, r16, r32, r64, infinity r1
  • 68. 68/73 Handover Related Timers (1/2) X2, S1 Protocol Timers TX2RELOCprep, TX2RELOCoverall, TS1RELOCprep, TS1RELOCoverall CLI Command Change timer operation Information
  • 69. 69/73 Handover Related Timers (2/2) Parameter Description Range Value S1_PATH_SWITCH Target eNB sends Path Switch Request message to MME for S1 handover. The timer should be set when Target eNB is waiting Path Switch Request Acknowledge message from MME. 0 ~ 65535 (ms) 3000 S1 HANDOVER PREPARATION Source eNB sends Handover Request message to target eNB for S1 handover. The timer should be set when Source eNB is waiting Handover Request Acknowledge message from Target eNB. 0 ~ 65535 (ms) 5000 S1 RELOC OVERALL After the preparation procedure for S1 Handover, the timer should be set when Source eNB is waiting UE Context Release Command message from MME. 0 ~ 65535 (ms) 5000 S1 HANDOVER CANCEL Source eNB sends Handover Cancel message to MME for S1 handover. The timer should be set when Source eNB is waiting Handover Cancel Acknowledge message from MME. 0 ~ 65535 (ms) 5000 X2 HANDOVER PREPARATION Source eNB sends Handover Request message to target eNB for X2 handover. The timer should be set when Source eNB is waiting Handover Request Acknowledge message from Target eNB. 0 ~ 65535 (ms) 5000 X2 RELOC OVERALL After the preparation procedure for X2 Handover, the timer should be set when Source eNB is waiting UE Context Release message from target eNB. 0 ~ 65535 (ms) 5000 X2 STORE UE CONTEXT After X2 Handover, the MRO timer is working on target eNB. If target eNB receives RLF indication message while this timer is working on Target eNB, MRO statistic function is executed. 0 ~ 65535 (ms) 10000
  • 71. 71/73 eNB-controlled Handover Restriction (1/2) NO_HO If this option parameter is set to ‘TRUE’, It is not handover to the designated eNB. Set IP version 6 format for specific neighbor eNB IP address. CLI Command
  • 72. 72/73 eNB-controlled Handover Restriction (2/2) IS_HOALLOWED If this option parameter is set to ‘FALSE’, It is not handover to the designated cell. CLI Command Change E-UTRA cell’s information which is located at surrounding base station.
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