HSDPA Principles and configuration

HSDPA over Iur RNC controlled dynamic code allocation NodeB-controlled dynamic code allocation SRB over HSPA Multi RAB(1...

4 downloads 295 Views 1MB Size
Internal

HSDPA Principles and configuration BSC6810V200R011

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

www.huawei.com

 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 Basic admission control

Max user no. 64/cell CAC/LDR/Schedule based on GBR RNC controlled dynamic code allocation

HUAWEI TECHNOLOGIES CO., LTD.

HSDPA over Iur NodeB-controlled dynamic code allocation

SRB over HSPA

Multi RAB(1CS + 2PS)

VOIP over HSPA

All rights reserved

Page 2

 Upon completion of this course, you will be

able to:  Relevant principles of HSDPA  Features of HSDPA  Relevant data configuration of HSDPA

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 3

Chapter 1 HSDPA Principle Chapter 2 HSDPA signaling procedure Chapter 3 HSDPA radio resource management Chapter 4 HSDPA data configuratioin

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 4

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

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

DTCH

DCCH

MAC-d

DCCH

MAC-d

MAC-hs

MAC-hs

HS-DSCH FP

HS-DSCH FP

PHY

PHY

TNL

TNL

UE

Uu

HUAWEI TECHNOLOGIES CO., LTD.

NodeB

Iub

All rights reserved

CRNC/SRNC

Page 6

MAC_hs MAC-d flows MAC-hs

Scheduling/Priority handling Priority Queue distribution

Priority Queue

Priority Queue

Priority Queue distribution

Priority Queue

Priority Queue

MAC – Control

HARQ entity

TFRC selection

Associated Uplink Signalling

HS-DSCH

HUAWEI TECHNOLOGIES CO., LTD.

Associated Downlink Signalling

All rights reserved

Page 7

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

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

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

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

2Tslot = 5120 chips

HARQ-ACK

CQI

One HS-DPCCH subframe (2 ms)

Subframe #0

Subframe #i

Subframe #4

One radio frame Tf = 10 ms

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 11

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 NTPC bits

(Tx OFF)

Tslot = 2560 chips

Slot #0

Slot #1

Slot #i

Slot #14

1 radio frame: Tf = 10 ms

Figure 12B: Frame structure for F-DPCH

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 12

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. P-CCPCH frame TPC

offset(256chip) UE1 0

TPC TPC

TPC TPC TPC TPC TPC TPC TPC TPC

TPC

HUAWEI TECHNOLOGIES CO., LTD.

TPC

All rights reserved

Page 13

UE2

1

UE3

2

UE4

3

UE5

4

UE6

5

UE7

6

UE8

7

UE9

8

UE10

9

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 HSDSCH. 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_SWITCH1&PS_STREAMING_ON_HSDPA_SWITCH-1;  SET FRC: UlStrThsOnHsupa=D32, UlBeTraffThsOnHsupa=D64;

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 14

HS-DSCH Mapping to HSDPA channel

F-DPCH

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 15

HSPDA Physical Channel Timing Relationship

10 ms

Radio frame with (SFN modulo 2) = 0

P-CCPCH

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

Subframe #0 Subframe #1 Subframe #2 Subframe #3 Subframe #4

HS-PDSCH 2 slots

15 slots = 10 ms

Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot Slot

DPCH

DPCH

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 16

HSDPA Key Technology  2 ms TTI  Link adaptation through HARQ  AMC in the physical layer  Mac-hs scheduling

 HSDPA flow control

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 17

HSDPA Key Technology  2 ms TTI

 Faster data scheduling  Faster data transmission  Shorter delay

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 18

HSDPA Key Technology  HARQ Technology:

 the HARQ is combination of the Forward Error Correction (FEC) and ARQ Coding combination

Description

Comparison

Chase Combining

Retransmit the same bit set

Increment Redundancy

Retransmit different bit sets

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.

 Every HSDPA user has an HARQ entity on both the UE and NodeB sides, each having up to six HARQ processes. HS-SC

HS-SC HS-PDS

HS-PDS

HARQ process 1

12ms or more HS-SC

HS-SC

HS-PDS

HS-PDS

HARQ process 2

HUAWEI TECHNOLOGIES CO., LTD.

12ms or more

All rights reserved

Page 19

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) Poor (The UE is at the boarder of the cell or there is a sever attenuation)

HUAWEI TECHNOLOGIES CO., LTD.

Modulation and rate High order modulation (for example, 16QAM/64QAM)

Result

High peak rate

High coding rate Low order modulation (for example, QPSK)

High communication quality

Low coding rate

All rights reserved

Page 20

HSDPA Key Technology  HSDPA Scheduling Algorithm : Algorithm

Description

Max C/I

Allocates resources to the UE with the best channel conditions at each TTI, maximizing the cell throughput.

Round Robin

Allocates resources to the UE with the longest waiting time, Users’ time fairness is guaranteed but the cell throughput is low.

Proportional Fair (PF)

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

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

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

bit7

bit 0

Number of Octets

SRNC

Node B

Spare bits 7-4 CAPACITY REQUEST

CmCH-PI

User Buffer Size User Buffer Size (cont) Spare Extension

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 23

1 1 Payload 1 0-32

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 0

7 Spare bits 7-4

CmCH-PI

Maximum MAC-d PDU Length SRNC

Node B

Maximum MAC-d PDU Length (cont)

CAPACITY ALLOCATION

HS-DSCH Credits

HS-DSCH Credits (cont) HS-DSCH Interval HS-DSCH Repetition Period Spare Extension

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 24

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

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

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

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

HSDPA Flow Control in RAN10  Flow control in NodeB

 MML Commands:

− SET HSDPAFLOWCTRLPARA: SWITCH=BW_SHAPING_ONOFF_TOGGLE

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 29

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

Chapter 1 HSDPA Principle Chapter 2 HSDPA signaling procedure Chapter 3 HSDPA radio resource management Chapter 4 HSDPA data configuratioin

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 31

HSDPA resource allocation CRNC

Node B PHYSICAL SHARED CHANNEL RECONFIGURATION REQUEST

PHYSICAL SHARED CHANNEL RECONFIGURATION RESPONSE

IE/Group Name

Presence

HS-PDSCH and HSSCCH Total Power

O

HS-PDSCH and HSSCCH Scrambling Code

Range

DL Scrambling Code 9.2.2.13

O

HS-PDSCH FDD Code Information HS-SCCH FDD Code Information

HUAWEI TECHNOLOGIES CO., LTD.

IE Type and Reference Maximum Transmission Power9.2.1.40

0..1

9.2.2.18F

0..1

9.2.2.18G

All rights reserved

Semantics Description Maximum transmission power.to be allowed for HS-PDSCH and HS-SCCH codes Scrambling code on which HSPDSCH and HS-SCCH is transmitted. 0= Primary scrambling code of the cell 1…15 = Secondary scrambling code

Page 32

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

HSDPA channel setup signaling examples (over Iur) Node B

UE

Drift RNC

Serving RNC 1. RL Reconfig Prepare

RNSAP

RNSAP

2. RL Reconfig Prepare NBAP

NBAP 3. RL Reconfig Ready

NBAP

NBAP 4. RL Reconfig Ready RNSAP

RNSAP

5. RL Reconfig Commit

RNSAP

RNSAP

6. RL Reconfig Commit NBAP

NBAP

ALCAP Iub Trans. Bearer Setup

ALCAP Iur Trans. Bearer Setup

7. DCCH: Radio Bearer Reconfiguration RRC

RRC 8. DCCH: Radio Bearer Reconfiguration Complete

RRC

RRC 10. HS-DSCH Capacity Request HS-DSCH-FP

9. HS-DSCH Capacity Request HS-DSCH-FP

11. HS-DSCH Capacity Alloc HS-DSCH-FP

HS-DSCH FP

12. HS-DSCH Capacity Alloc. HS-DSCH-FP

HS-DSCH-FP

13. Data transfer

15. Shared control channel MAC-hs

MAC-hs

16. Data transfer

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 34

Chapter 1 HSDPA Principle Chapter 2 HSDPA signaling procedure Chapter 3 HSDPA radio resource management Chapter 4 HSDPA data configuratioin

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 35

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

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 , EAGCH, E-RGCH, the rest power is allocated to HS-SCCH and HSPDSCH. 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

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

HSDPA Codes Allocation  HSDPA Codes Allocation

 Static Allocation − In static allocation, the RNC reserves some codes for the HSPDSCH. 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

HSDPA Codes Allocation 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 1 ┏ 0 ┫ ┗ 3 ┫ SF=4 ┃ ┗━○1 ┃ ┏ 0 ┫ ┗━●C(128,7):HS-SCCH 2 ┃ ┗ ○1 ┃ ┗━○1

 Static Allocation example

 suppose RNC is configured with:

 2 HS-SCCH  2 HS-PDSCH

┏━○2 ┃ ┃ ┃ ┗━ 3

┏ ○6 ┃ SF=16 ┃ ┏ ●C(16,14):HS-PDSCH 2 ┫ ┃ ┗ 7 ┫ ┗ ●C(16,15):HS-PDSCH 1

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

● CCH ● HSDPA ○ DCH

Page 40

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 Min number of codes

Max number of codes Codes available for DPCH

HUAWEI TECHNOLOGIES CO., LTD.

Codes reserved for HS- PDSCH

All rights reserved

Page 41

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

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

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

HSDPA Codes Allocation  NodeB-Controlled Dynamic Allocation

 NodeB-controlled dynamic allocation allows the NodeB to use the HSPDSCH 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

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

HSDPA Cell Admission Control  HSDPA UE Admission control

 ADD CELLALGOSWITCH: NBMCacAlgoSwitch=HSDPA_ADCTRL1&HSUPA_ADCTRL-1&HSDPA_GBP_MEAS1&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

HSDPA Channel Switch  Channel type transition after introducing the HSDPA UE state transition

Channel switching

CELL_DCH (with HS-DSCH)  CELL_DCH

HS-DSCH  DCH

CELL_DCH (with HS-DSCH)  CELL_FACH

HS-DSCH  FACH

 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 HSDSCH.

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 48

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

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 HSDSCH 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

HSDPA Mobility Management  A UE may have two connections with the network after introducing the HSDPA

Connection

Handover A UE can keep only one HSDPA connection with the network at a time. The HSDPA handover includes:

HSDPA connection

Intra frequency handover Inter frequency handover Inter-rat handover

DPCH

Similar to the R99 system handover, the DPCH handover includes soft handover,

connection

hard handover and inter-RAT handover.

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 51

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

Chapter 1 HSDPA Principle Chapter 2 HSDPA signaling procedure Chapter 3 HSDPA radio resource management Chapter 4 HSDPA data configuratioin

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

Page 53

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

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

Thank You www.huawei.com