Huawei 2008 W-CDMA (UMTS) HSDPA RRM and parameters -- how to make HSDPA work better (very good)

download Huawei 2008 W-CDMA (UMTS) HSDPA RRM and parameters -- how to make HSDPA work better (very good)

of 81

  • date post

    07-Aug-2015
  • Category

    Documents

  • view

    327
  • download

    12

Embed Size (px)

description

A complete guide on HSDPA parameters, their meaning and impact on network KPIs, includes recommendations on how to set the parameters to improve network performance

Transcript of Huawei 2008 W-CDMA (UMTS) HSDPA RRM and parameters -- how to make HSDPA work better (very good)

HSDPA RRM and Parameterswww.huawei.com

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Confidential Information of Huawei. No Spreading Without Permission

Contents1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Management 3. HSDPA Power Management 4. HSDPA Mobility Management 5. HSDPA Channel Switching 6. HSDPA Mac-hs Scheduling Algorithm 7. HSDPA TFRC Selection 8. HSDPA Flow control

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page1

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz z

UMTS network could provide multi-services such as CS service, PS service and signaling In most case, CS service with high requirement of transmission quality will be mapped onto DCH

z

PS service such as PS conversational service i.e. VOIP, streaming service, BE service and signaling ) could be mapped onto HS-DSCH

z

The following figure show mapping between service and bearer

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page2

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz z

PS conversational services may be mapped onto the DCH, HS-DSCH, or E-DCH If Voip channel type = DCH

Both uplink and downlink are mapped onto DCH

z

If Voip channel type = HSDPA

Uplink is beared on DCH, downlink mapped onto HS-DSCH

z

If Voip channel type = HSPA

Uplink is beared on E-DCH, downlink mapped onto HS-DSCH

For Ps conversational service VoipChlType --- UL_DCH / DL_DCH, UL_DCH / DL_HS-PDSCH, UL_EDCH / DL_HSP-DSCH MML: SET FRCCHLTYPEPARA

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page3

VoIP stands for Voice over IP, a PS conversational service. It uses IP data packets to encapsulate voice data and transports them on the IP network to implement the conversational services.

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz

During the setup of an RRC connection, the single SRB can be carried on the CCH, DCH, HS-DSCH, or E-DCH

z

If the selected channel type is FACH, the SRB is carried on the CCH in both the uplink and the downlink

z

If the selected channel type is DCH, then

In the downlink, if Srb channel type RRC effect flag is set to TRUE and Srb channel type is set to HSDPA or HSPA, the SRB is carried on the HS-DSCH; otherwise, on the DCH

In the uplink, if Srb channel type RRC effect flag is set to TRUE and Srb channel type is set to HSPA, the SRB is carried on the E-DCH; otherwise, on the DCH

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page4

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz z

SRB may be mapped onto the DCH, HS-DSCH, or E-DCH, RACH/FACH If SRB channel type = DCH

Both uplink and downlink are mapped onto DCH

z

If SRB channel type = HSDPA

Uplink is mapped on DCH, downlink mapped onto HS-DSCH

z

If SRB channel type = HSPA

Uplink is mapped on E-DCH, downlink mapped onto HS-DSCHSrbChlType --- UL_DCH / DL_DCH, UL_DCH / DL_HSPDSCH, UL_EDCH / DL_HS-PDSCH MML: SET FRCCHLTYPEPARA

Bearer types for SRB

Bandwidth allocation

SigChType --- FACH ,DCH-3.4kbps-signaling, DCH13.6kbps-signaling, DCH-27.2kbps-signaling

MML: SET RRCESTCAUSE

z

With SRB over HSPA, call setup delay is reduced, moreover compared with SRB over DCH , code resource is savedPage5

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz

During the setup of an RRC connection, the single SRB can be carried on the CCH, DCH,

HS-DSCH, or E-DCHz

If the selected channel type is FACH, the SRB is carried on the CCH in both the uplink and

the downlinkz

If the selected channel type is DCH, then

In the downlink, if Srb channel type RRC effect flag is set to TRUE and Srb

channel type is set to HSDPA or HSPA, the SRB is carried on the HS-DSCH; otherwise, on the DCH

In the uplink, if Srb channel type RRC effect flag is set to TRUE and Srb channel

type is set to HSPA, the SRB is carried on the E-DCH; otherwise, on the DCH

Bearer types for SRB

SrbChlTypeRrcEffectFlag --- TURE, FALSE

MML: SET FRCCHLTYPEPARA

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page6

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz

PS streaming services can be mapped onto the DCH, HS-DSCH, or E-DCH

The cell supports HSDPA PS_STREAMING_ON_HSDPA_SWITCH is selected If the maximum DL service rate is higher than or equal to DL streaming traffic

threshold on HSDPA then PS streaming service is carried on the HS-DSCH. Otherwise, it is carried on the DCH

Bit rate threshold for streaming over HSPA Algorithm switch for streaming over HSPA

DlStrThsOnHsdpa --- 8, 16, 32, 64, 128, 144, 256, 384kbps UlStrThsOnHsupa --- 8, 16, 32, 64, 128, 144, 256, 384kbps PS_STREAMING_ON_HSDPA_SWITCH --- Enable , Disable PS_STREAMING_ON_E_DCH_SWITCH --- Enable , Disable

MML: SET FRCCHLTYPEPARA

MML: SET CORRMALGOSWITCH

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page7

PS streaming services can be mapped onto the DCH, HS-DSCH, or E-DCH

If the maximum UL service rate is higher than or equal to UL streaming traffic threshold on HSUPA

The cell supports HSUPA PS_STREAMING_ON_E_DCH_SWITCH is selected

then the service is carried on the E-DCH. Otherwise, the service is carried on the DCH

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz z

The IMS signaling can be mapped on the DCH, HS-DSCH, or E-DCH If IMS channel type = DCH

Both uplink and downlink are mapped on DCH Uplink is mapped on DCH, downlink mapped on HS-DSCH Uplink is mapped onto E-DCH, downlink mapped on HS-DSCHImsChlType --- UL_DCH / DL_DCH, UL_DCH / DL_HSPDSCH, UL_EDCH / DL_HS-PDSCH MML: SET FRCCHLTYPEPARA

z

If IMS channel type = HSDPA

z

If IMS channel type = HSPA

Bearer types for IMS signaling

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page8

IMS signaling (SIP SDP) is an PS RAB to UTRAN, and only setup on DCH and use the fixed configuration before RAN10.0 SIP / SDP characteristics based on Huawei research - The traffic in the SIP/SDP setup phase is about 70Kbits and the setup time is generally less than 3s, therefore, mean bit rate is 23.3Kbps-

Very low traffic exists on SIP / SDP after connection establishmentUTRAN UTRAN PS Domain IMS IMS PS Domain Domain UTRAN UTRAN UE

UE

UE

Session control Signaling (SIP / SDP) Media ( RTP) Real Time Media Control (RTCP)

)

It is more suitable for HSPA to bear IMS Signaling

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPAz

PS interactive and background services (i.e. BE service) can be mapped onto the

CCH, DCH, HS-DSCH, or E-DCH

Low-rate PS services have relatively small amount of data. Therefore, such PS

services can be carried on the CCH to save radio resources

If the maximum DL service rate is lower than DL BE traffic DCH decision threshold, the maximum UL service rate is lower than UL BE traffic DCH decision threshold, and the RRC connection is set up on the CCH, then the service is carried on the CCH.

Otherwise, further decision need to be made as follows:

If the maximum DL service rate is higher than or equal to DL BE traffic threshold on HSDPA, then the service is carried on the HS-DSCH. Otherwise, the service is carried on the DCH

If the maximum UL service rate is higher than or equal to UL BE traffic threshold on HSUPA, then the service is carried on the E-DCH. Otherwise, the service is carried on the DCH

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page9

Confidential Information of Huawei. No Spreading Without Permission

Mapping signaling and traffic onto HSDPABit rate threshold for BE service over HSPA DL BE traffic DCH decision threshold --- 8, 16kbps UL BE traffic DCH decision threshold --- 8, 16kbps DL BE traffic threshold on HSDPA --- 8, 16, 32, 64, 128, 144, 256, 384, 768, 1024, 1536, 1800, 2048, 3648, 7200, 10100, 14400kbps UL BE traffic threshold on HSUPA --- 8, 16, 32, 64, 128, 144, 256, 384, 608, 1450, 2048,2890, 5760kbps MML: SET FRCCHLTYPEPARA

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page10

Confidential Information of Huawei. No Spreading Without Permission

Contents1. HSDPA Channel Type Mapping 2. HSDPA Code Resource Management 3. HSDPA Power Management 4. HSDPA Mobility Management 5. HSDPA Channel Switching 6. HSDPA Mac-hs Scheduling Algorithm 7. HSDPA TFRC Selection 8. HSDPA Flow control

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page11

Confidential Information of Huawei. No Spreading Without Permission

HSDPA Code Resource Allocationz

The codes of the HS-PDSCH can be allocated in three ways:

Static HSDPA code allocation

In static allocation,