HSDPA Principles and configuration

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Main features RAN5.0 HSDPA Phase 1 RAN5.1 HSDPA Phase 2 RAN6 HSDPA Phase 3 RAN10 Max rate 1.8Mbps/user Max rate 3.6Mbps/user Max rate 7.2Mbps/user Max rate 14.4Mbps/user Max user no.

2 Main features RAN5.0 HSDPA Phase 1 RAN5.1 HSDPA Phase 2 RAN6 HSDPA Phase 3 RAN10 Max rate 1.8Mbps/user Max rate 3.6Mbps/user Max rate 7.2Mbps/user Max rate 14.4Mbps/user Max user no. 16/cell Max user no. 64/cell Basic admission control CAC/LDR/Schedule based on GBR HSDPA over Iur RNC controlled dynamic code allocation NodeB-controlled dynamic code allocation SRB over HSPA Multi RAB(1CS + 2PS) VOIP over HSPA HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 2

Chapter 1 HSDPA Principle Chapter 2 HSDPA signaling procedure Chapter 3 HSDPA radio resource

5 Introduction Higher downlink peak transmission rate: up to 14.4 Mbit/s More efficient downlink codes and power utilization: for macro cell coverage, the capacity is 50% higher; for micro cell coverage, the capacity is 200% 300% or higher HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 5

6 Realization of the HSDPA UTRAN side: MAC-hs and HSDPA physical layer processing HS-DSCH FP between the SRNC, CRNC, and NodeB for user plane data transmission CN side: PS domain needs to support higher rate of service assignment and user plane transmission and switching DTCH DCCH DTCH DCCH MAC-d MAC-d MAC-hs MAC-hs HS-DSCH FP HS-DSCH FP PHY PHY TNL TNL UE Uu NodeB Iub CRNC/SRNC HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 6

7 MAC_hs MAC-d flows MAC-hs Priority Queue distribution Scheduling/Priority handling Priority Queue distribution Priority Queue Priority Queue Priority Queue Priority Queue MAC Control HARQ entity TFRC selection Associated Uplink Signalling HS-DSCH Associated Downlink Signalling HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 7

8 MAC_hs Flow Control: This function is intended to limit layer 2 signalling latency and reduce discarded and retransmitted data as a result of HS-DSCH congestion. Flow control is provided independently by MAC-d flow for a given MAC-hs entity. Scheduling/Priority Handling: This function manages HS-DSCH resources between HARQ entities and data flows according to their priority. Based on status reports from associated uplink signalling either new transmission or retransmission is determined. Further it determines the Queue ID and TSN for each new MAC-hs PDU being serviced. A new transmission can be initiated instead of a pending retransmission at any time to support the priority handling. HARQ: One HARQ entity handles the hybrid ARQ functionality for one user. One HARQ entity is capable of supporting multiple instances (HARQ process) of stop and wait HARQ protocols. There shall be one HARQ process per HS-DSCH per TTI. TFRC selection: Selection of an appropriate transport format and resource for the data to be transmitted on HS-DSCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 8

9 HSDPA Physical Channel HS-PDSCH: High Speed Physical Downlink Shared Channel The HS-PDSCH is used to carry downlink service data. The spreading factor of the HS-PDSCH can be 16 only. Each cell can provide at most 15 HS-PDSCHs whose codes must be continuous. When a cell provides 15 HS-PDSCHs, the maximum rate reaches 14.4 Mbit/s. The HS-PDSCH adopts the QPSK or 16QAM modulation mode In RAN11 supporting HSPA+, 64QAM/MIMO is supported HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 9

10 HSDPA Physical Channel HS-SCCH: High Speed Shared Control Channel The HS-SCCH carries downlink control information. It is used to notify the UE of the information about the HS-PDSCH, including modulation mode, size of a transmission block, version redundant information, UE ID and HS-PDSCH channel code. HS-SCCH is aligned with the PCCPCH in timing and keeps fixed time offset with the HS-PDSCH. Its spreading factor is fixed as 128 and QPSK is the only modulation mode. The number of HS-SCCHs (128 at most) and the channel codes in the cell are decided by RNC, which notifies NodeB through the NBAP signaling message. The UE can detect one to four HS-SCCHs specified by the NodeB at one time HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 10

11 HSDPA Physical Channel HS-DPCCH: High Speed Dedicated Physical Control Channel The HS-DPCCH is used to carry the uplink feedback information related to the downlink HS-PDSCH, including ACK/NACK and CQI. The spreading factor of the HS-DPCCH is fixed as 256. T slot = 2560 chips HARQ-ACK 2 T slot = 5120 chips CQI One HS-DPCCH subframe (2 ms) Subframe #0 Subframe # i Subframe #4 One radio frame T f = 10 ms HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 11

12 SRB over HSPA F-DPCH The F-DPCH carries control information generated at layer 1 (TPC commands). It is a special case of the downlink DPCCH. The following figure shows the frame structure of the F-DPCH. Each frame of length 10 ms is split into 15 slots, each of length timeslot = 2560 chips, corresponding to one power-control period. 512 chips (Tx OFF) TPC N TPC bits (Tx OFF) T slot = 2560 chips Slot #0 Slot #1 Slot #i Slot #14 1 radio frame: T f = 10 ms Figure 12B: Frame structure for F-DPCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 12

13 SRB over HSPA F-DPCH Through time division multiplexing of one SF256 F-DPCH channel code by multiple UEs, the channel code resources and power resources of a cell can be saved, and the system capacity can be improved. Each UE occupies only one symbol in each slot to carry the TPC command. The Pilot domain and TFCI are removed. TPC P-CCPCH frame TPC offset(256chip) UE1 0 TPC TPC UE2 1 TPC UE3 2 TPC UE4 3 TPC UE5 4 TPC UE6 5 TPC UE7 6 TPC UE8 7 TPC UE9 8 TPC TPC UE10 9 HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 13

14 HSDPA Channel Mapping HS-DSCH: High Speed Downlink Shared Channel Traffic classes supported by the HS-DSCH Traffic classes Streaming Interactive Background Description The switch [PS_STREAMING_ON_HSDPA_SWITCH] decides the streaming service on the HS-DSCH. When the switch is on, the streaming service is mapped to the HS- DSCH. When the switch is off, the streaming service is mapped to the DPCH. The generic term for these two services is BE service. The BE services are mapped to the HS-DSCH whenever possible. SET CORRMALGOSWITCH: HspaSwitch=PS_STREAMING_ON_E_DCH_SWITCH- 1&PS_STREAMING_ON_HSDPA_SWITCH-1; SET FRC: UlStrThsOnHsupa=D32, UlBeTraffThsOnHsupa=D64; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 14

16 HSPDA Physical Channel Timing Relationship P-CCPCH 10 ms Radio frame with (SFN modulo 2) = 0 Radio frame with (SFN modulo 2)=1 3 slots = 2 ms HS-SCCH Subframe #0 Subframe #1 Subframe #2 Subframe #3 Subframe #4 3 slots = 2 ms HS-PDSCH Subframe #0 Subframe #1 Subframe #2 Subframe #3 Subframe #4 2 slots 15 slots = 10 ms DPCH Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot DPCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 16

19 HSDPA Key Technology HARQ Technology: the HARQ is combination of the Forward Error Correction (FEC) and ARQ Coding combination Description Comparison Chase Combining Increment Redundancy Retransmit the same bit set Retransmit different bit sets Every HSDPA user has an HARQ entity on both the UE and NodeB sides, each having up to six HARQ processes. HS-SC The second mode is better in that the combination of the retransmitted bit set and the former bit set raises the redundant data and the possibility of recovery from errors at the air interface. HS-SC HS-PDS HS-PDS HARQ process 1 12ms or more HS-SC HS-PDS HS-SC HS-PDS HARQ process 2 12ms or more HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 19

20 HSDPA Key Technology AMC Technology: The UE reports the CQI to the NodeB through the HS-DPCCH and the NodeB selects coding rate and modulation mode according to the radio environment indicated by the CQI The condition of the radio environment Good ( The UE is near the NodeB) Modulation and rate High order modulation (for example, 16QAM/64QAM) High coding rate Result High peak rate Poor (The UE is at the boarder of the cell or there is a sever attenuation) Low order modulation (for example, QPSK) Low coding rate High communication quality HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 20

21 HSDPA Key Technology HSDPA Scheduling Algorithm : Algorithm Max C/I Round Robin Proportional Fair (PF) Description Allocates resources to the UE with the best channel conditions at each TTI, maximizing the cell throughput. Allocates resources to the UE with the longest waiting time, Users time fairness is guaranteed but the cell throughput is low. Allocates resources to the UE according to the radio condition and the achieved data rate. The higher the CQI is, the more the opportunity of the user being scheduled. The lower the achieved data rate is, the more the user can be scheduled. The PF scheduling algorithm is a trade-off between the fairness and the cell throughput. EPF Guarantees the GBR requirement of the streaming service and the BE service. The GBR of BE service is configured by RNC LMT and NodeB LMT, which means that if the BE service achieve the GBR, the BE user is satisfied. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 21

22 HSDPA Key Technology HSDPA Scheduling Algorithm : MML Commands: NodeB Side SET MACHSPARA: SM=EPF;; SET MACHSSPIPARA:; RNC side SET USERPRIORITY SET SCHEDULEPRIOMAP:; SET USERGBR:; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 22

23 HSDPA Flow Control HS-DSCH Capacity Request The HS-DSCH Capacity Request procedure provides means for the CRNC to request HS-DSCH capacity by indicating the user buffer size in the CRNC for a given priority level Node B SRNC bit7 bit 0 Spare bits 7-4 CmCH -PI Number of Octets 1 CAPACITY REQUEST User Buffer Size User Buffer Size ( cont) 1 1 Payload Spare Extension 0-32 HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 23

24 HSDPA Flow Control HS-DSCH Capacity Allocation procedure It may be generated either in response to a HS-DSCH Capacity Request or at any other time 7 0 Spare bits 7-4 CmCH-PI Maximum MAC-d PDU Length Node B SRNC Maximum MAC-d PDU Length (cont) HS-DSCH Credits CAPACITY ALLOCATION HS-DSCH Credits (cont) HS-DSCH Interval HS-DSCH Repetition Period Spare Extension HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 24

25 HSDPA Flow Control in RAN10 Flow control is implemented in both RNC and NodeB On the NodeB, use adaptive flow control and traffic shaping to avoid congestion on the Iub interface. On the RNC, use VP shaping and backpressure to avoid congestion on the Iub interface. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 25

26 HSDPA Flow Control in RAN10 Flow control in NodeB Bandwidth allocation for UE queues A NodeB allocates the bandwidth on the Iub interface for each MAC-hs queue according to the buffering status of the queue and the rate on the Uu interface. If the queue lacks data, the bandwidth allocated by the NodeB is higher than the rate on the Uu interface. If the queue contains sufficient data, the bandwidth allocated by the NodeB is close to the rate on the Uu interface. If the queue contains excessive data, the bandwidth allocated by the NodeB is lower than the rate on the Uu interface. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 26

27 HSDPA Flow Control in RAN10 Flow control in NodeB Traffic shaping on Iub interface During bandwidth allocation, guaranteed bit rate (GBR) UEs are preferred. Then, the remaining bandwidth is allocated according to the UE priority, that is, SPI weight proportionally When there is a severe lack of bandwidth, and the bandwidth cannot meet requirements of all the GBR UEs, the GBR UEs with high priority are preferred HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 27

28 HSDPA Flow Control in RAN10 Flow control in NodeB Adaptive flow control on Iub interface If the frame loss rate in the HS-DSCH is beyond the threshold, or the jitter of the HS-DSCH frames within a period of time exceeds the delay threshold, the bandwidth for the HSDPA service on the Iub interface is reduced. If the frame loss rate in the HS-DSCH is lower than the threshold, or the jitter of the HS-DSCH frames within a period of time is lower than the delay threshold, the bandwidth for the HSDPA service on the Iub interface is increased HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 28

30 HSDPA Flow Control in RAN10 Flow control in RNC VP shaping and backpressure Flow control and backpressure based on RLC retransmission rate VP backpressure on virtual port in RNC of V210 and V110 MML commands: SET PORTFLOWCTRLSWITCH ADD VP HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 30

32 HSDPA resource allocation CRNC PHYSICAL SHARED CHANNEL RECONFIGURATION REQUEST Node B PHYSICAL SHARED CHANNEL RECONFIGURATION RESPONSE IE/Group Name Presence Range HS-PDSCH and HS- SCCH Total Power HS-PDSCH and HS- SCCH Scrambling Code HS-PDSCH FDD Code Information HS-SCCH FDD Code Information O O IE Type and Reference Maximum Transmission Power DL Scrambling Code F G Semantics Description Maximum transmission power.to be allowed for HS-PDSCH and HS-SCCH codes Scrambling code on which HS- PDSCH and HS-SCCH is transmitted. 0= Primary scrambling code of the cell 1 15 = Secondary scrambling code HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 32

33 User HSDPA channel setup HSDPA channel setup procedure is the same as DCH setup,only the signaling contains IE for HSDPA channel UE UTRAN RADIO BEARER SETUP RADIO BEARER SETUP COMPLETE CRNC Node B RADIO LINK RECONFIGURATION PREPARE RADIO LINK RECONFIGURATION READY HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 33

34 HSDPA channel setup signaling examples (over Iur) UE Node B Drift Serving RNC RNC RNSAP 1. RL Reconfig Prepare RNSAP NBAP 2. RL Reconfig Prepare NBAP NBAP 3. RL Reconfig Ready NBAP RNSAP 4. RL Reconfig Ready RNSAP RNSAP 5. RL Reconfig Commit RNSAP NBAP 6. RL Reconfig Commit NBAP ALCAP Iub Trans. Bearer Setup ALCAP Iur Trans. Bearer Setup RRC 7. DCCH: Radio Bearer Reconfiguration RRC RRC 8. DCCH: Radio Bearer Reconfiguration Complete RRC HS-DSCH-FP 10. HS-DSCH Capacity Request HS-DSCH-FP 9. HS-DSCH Capacity Request HS-DSCH FP HS-DSCH-FP 11. HS-DSCH Capacity Alloc 12. HS-DSCH Capacity Alloc. HS-DSCH-FP HS-DSCH-FP 13. Data transfer MAC-hs 15. Shared control channel MAC-hs 16. Data transfer HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 34

36 HSDPA Power Allocation In v1.8 The MML command is:add CELLHSDPA: HspaPower=430; The power allocated for HSPA channels cannot exceed the value of HspaPower, the downlink channel includes the HS-PDSCH, HS-SCCH, E-AGCH, E-RGCH and E-HICHl. In V2.10 The MML command is ADD CELLHSDPA: AllocCodeMode=Manual, HspaPower=0, CodeAdjForHsdpaSwitch=ON;; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 36

37 HSDPA Power Allocation HSDPA Dynamic Power Resources Allocation Except reserving for the common channels, the rest power resources of the cell are allocated dynamically between the DPCH and HSPA DL physical channels. After allocating power to DPCH and E-HICH, E- AGCH, E-RGCH, the rest power is allocated to HS-SCCH and HS- PDSCH. The power allocated for HSPA cannot exceed the value of the HS-PDSCH, HS-SCCH, E-AGCH, E-RGCH and E-HICH Total Power. MML Commands: ADD CELLHSDPA: AllocCodeMode=Manual, HspaPower=0; SET MACHSPARA: PWRMGN=10; (NodeB) HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 37

38 HSDPA Codes Allocation V1.7 Static Allocation RNC controlled dynamic alloction V1.8 and V2.10 Static allocation RNC-controlled dynamic allocation NodeB-controlled dynamic allocation HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 38

39 HSDPA Codes Allocation HSDPA Codes Allocation Static Allocation In static allocation, the RNC reserves some codes for the HS- PDSCH. The DPCH and other common channels use the rest Code reserved for common channel Codes available for DPCH Codes reserved for HS-PDSCH SF=16 HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 39

40 HSDPA Codes Allocation Static Allocation example suppose RNC is configured with: 2 HS-SCCH 2 HS-PDSCH SF=256 SF=128 C(256,0): PCPICH 0 SF=64 C(256,1): PCCPCH 0 C(256,2): AICH 1 SF=32 C(256,3): PICH 0 SF=16 C(64,1):SCCPCH 1 0 C(64,2):SCCPCH 2 1 SF=8 C(128,6):HS-SCCH SF=4 1 0 C(128,7):HS-SCCH CCH SF=16 HSDPA C(16,14):HS-PDSCH 2 DCH 3 7 C(16,15):HS-PDSCH 1 HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 40

41 HSDPA Codes Allocation RNC-Controlled Dynamic Allocation In the RNC-controlled dynamic allocation, the RNC adjusts the reserved HS-PDSCH codes according to the real-time usage status of the codes Configure the maximum and minimum numbers of codes available for HS-PDSCH on the RNC OMC.The codes between the two parameters are called shared codes Code reserved for common channel Shared codes SF=16 Codes available for DPCH Max number of codes Min number of codes Codes reserved for HS- PDSCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 41

42 HSDPA Codes Allocation RNC-Controlled Dynamic Allocation Extending the codes reserved for the HS-PDSCH If in cell's code tree there is at least one code can be reserved and this code's SF is equal to or less than the Cell SF reserved threshold, NodeB will try to increase HS-PDSCH code number. Code reserved for common channel +HS-SCCH Shared codes SF=16 RNC extends the codes reserved for HS-PDSCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 42

43 HSDPA Codes Allocation RNC-Controlled Dynamic Allocation Reducing the codes reserved for HS-PDSCH When allocating the code resources triggered by radio link setup, the RNC will reallocate one of the shared codes reserved for HS-PDSCH to DPCH if the minimum SF among free codes is larger than the Cell SF reserved threshold. Code reserved for common channel +HS-SCCH Shared codes SF=16 RNC reduces the codes reserved for HS-PDSCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 43

44 HSDPA Codes Allocation RNC-Controlled Dynamic Allocation In v1.7, the Cell SF reserved threshold is configure with command: ADD CELLHSDPA: AllocCodeMode=Automatic, RevSFThd=SF16; In v1.8 and V2.10, the Cell SF reserved threshold is configure with command: ADD CELLLDR: CellSfResThd=SF16; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 44

45 HSDPA Codes Allocation NodeB-Controlled Dynamic Allocation NodeB-controlled dynamic allocation allows the NodeB to use the HS- PDSCH codes that are statically allocated by the RNC. Besides, the NodeB can dynamically allocate the idle codes of the current cell to the HS-PDSCH channel SET MACHSPARA: DYNCODESW=OPEN; This codes allocation has better performance then RNC controlled dynamic code allocation, so it is recommended to open this function and disable the RNC controlled allocation in RAN10 and later version HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 45

46 HSDPA Cell Admission Control HSDPA UE Admission control The admission decision based on the power resources The admission decision based on the Iub transmission resources The admission decision based on the number of UEs Only all the 3 aspects passed, then the user may be admitted. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 46

47 HSDPA Cell Admission Control HSDPA UE Admission control ADD CELLALGOSWITCH: NBMCacAlgoSwitch=HSDPA_ADCTRL- 1&HSUPA_ADCTRL-1&HSDPA_GBP_MEAS- 1&HSDPA_PBR_MEAS-1; ADD CELLCAC: CellId=65533, UlOtherThd=60, DlCellTotalThd=90, HsdpaStrmPBRThd=70, HsdpaBePBRThd=30, MaxHSDSCHUserNum=64; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 47

48 HSDPA Channel Switch Channel type transition after introducing the HSDPA UE state transition CELL_DCH (with HS-DSCH) CELL_DCH CELL_DCH (with HS-DSCH) CELL_FACH Channel switching HS-DSCH DCH HS-DSCH FACH Channel Switching between HS-DSCH and FACH UE will be switched from the HS-DSCH to the FACH to reduce occupation of the DPCH when the following conditions are met. The HS-DSCH carries the BE service or the PS streaming service for the UE. There is no data flow of any of the services for a certain length of time, which is set to BE HS-DSCH to FACH transition timer for BE service or Realtime Traff DCH to FACH transition timer for realtime service When the data flow gets more active, the UE is switched from the FACH to the HS- DSCH. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 48

49 HSDPA Channel Switch Channel Switching between HS-DSCH and DCH The switching from DCH to HS-DSCH can be triggered by mobility management, the traffic volume or the timer. While the switching from HS-DSCH to DCH can only be triggered by mobility management Triggered by mobility management Triggered by traffic volume When the service is suitable to be carried on HSDPA and the UE supports HSDPA but the service is actually mapped onto the DCH (for some reasons such as the UE is rejected to access a HSDPA cell by CAC Algorithm). If the activity of the H UE that performs data services increases and the RNC receives the report of the 4a event, the H UE will try to switch from DCH to HS-DSCH HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 49

50 HSDPA Channel Switch Channel Switching between HS-DSCH and DCH Triggered by timer When the service is suitable to be carried on HSDPA and the UE supports HSDPA but the service is actually mapped onto the DCH (for some reasons such as the UE is rejected to access a HSDPA cell by CAC Algorithm), a timer is used to periodical attempt to map the service onto the HS-DSCH. Firstly, attempt to map onto HS-DSCH of the current cell, if failed, then attempt to map onto HS- DSCH of the inter-frequency blind handover cell with the same coverage. This timer length is set to H Retry timer length. SET COIFTIMER: HRetryTimerLen=10; HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 50

51 HSDPA Mobility Management A UE may have two connections with the network after introducing the HSDPA Connection HSDPA connection DPCH connection Handover A UE can keep only one HSDPA connection with the network at a time. The HSDPA handover includes: Intra frequency handover Inter frequency handover Inter-rat handover Similar to the R99 system handover, the DPCH handover includes soft handover, hard handover and inter-rat handover. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 51

52 HSDPA Mobility Management Intra frequency handover For HSDPA connections, HS-DSCH does not support softhandover, usually the handover is a process of serving HSDPA cell change which is triggered by 1D event report. Inter frequency handover Generally, the hard handover and the serving HSDPA cell change take place at the same time Inter system handover The procedure is very similar to R99 service inter-rat handover. If the compressed mode is disabled by command: SET CMCF: HsdpaCMPermissionInd=FALSE;, then the UE should fall back to DCH and then make a 3G to 2G hard handover. HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 52

54 Setup HSDPA Cell DSP LICENSE:; to check the HSDPA service is enabled. Confirm that R99 cell has been configured by LST CELL:; On the basis of R99 cell data, setup HSDPA cell: Execute MML command: ADD CELLHSDPA: AllocCodeMode=Automatic, CodeAdjForHsdpaSwitch=ON; ACT CELLHSDPA:; to activate the HSDPA function HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 54

55 Increase AAL2Path for HSDPA Service In RAN10 and earlier version: ADD AAL2PATH: PAT=HSPA_NRT; ADD IPPATH: TFT=HSPA_NRT; In RAN11 ADD IPPATH: ITFT=IUB, TRANST=IP, PATHT=AFxx/BE/EF ADD AAL2PATH: AAL2PATHT=HSPA/R99/SHARE HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 55

56 Thank You

Call Establishment and Handover Procedures of PS Calls using HSDPA

3 Call Establishment and Handover Procedures of PS Calls using HSDPA The following chapter explains special performance measurement requirements for PS calls that use HSDPA. Differences in performance