Saudi STC Signal Storm EFD V2.2

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level: Confidential

47pt

30pt

:

FrutigerNext LT Medium

: Arial

47pt

28pt

2013/9/9

EFD Signal Storm Step 2

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

35pt

32pt

) :18pt

Page 2

Basic Concept

IMEI and TAC The International Mobile Equipment Identity (IMEI) is a serial number of

15 digits. An IMEI is unique to a specific UE in the world as bellow table.

The Type Approval Code (TAC) is a part of an IMEI. A TAC is used to

identify the type of UE.

Composition of the IMEI

TAC (6bit~8bit) FAC (2bit) SNR (6bit) Spare (1bit) TACs are assigned by the

European type approval

center.

The Final Assembly Code

(FAC) specifies the

manufacturer or the place

where the assembly is

completed. FAC is set by

manufacturers.

The Serial Number (SNR)

is an individual serial

number uniquely

identifying each MS of

each TAC and FAC.

It indicates that the digit is

spare.


35pt

32pt

) :18pt

Page 3

Basic Concept

Fast Dormancy Fast dormancy can be enabled for electricity saving in the UEs that

comply with the Release 8 of the 3rd Generation Partnership Project

(3GPP R8). A UE sends a Signaling Connection Release Indication (SCRI)

message for fast dormancy when no data is transmitted in the uplink or

downlink for six to eight seconds. In the SCRI message, the Signaling

Connection Release Indication Cause is UE Requested PS Data session end.

After sending an SCRI message, the UE waits for a state transition

instruction from the RNC. Usually after the RNC receives the SCRI

message, the RNC immediately releases the RRC connection and the UE

enters idle mode for power saving.


35pt

32pt

) :18pt

Page 4

Basic Concept

PS Inactivity Detection Radio resources are limited and a UE is expected to release resources

such as a dedicated channel (DCH) when there is no data transmission.

The RNC instructs the UE to enter the CELL_PCH state or idle mode

after the RNC detects that data transmission is unavailable for the UE for

a certain period (20 seconds by default and refer to CFG).


35pt

32pt

) :18pt

Page 5

EFD BASIC PRINCIPLE


35pt

32pt

) :18pt

Page 6

EFD BASIC PRINCIPLE

This feature is concerned with the impact of Fast Dormancy to the RNC.

To reduce the signaling processing cost in the Fast Dormancy procedure,

when receiving SCRI (signaling connection release indication) message

from UE or UE inactivity timer expires, RNC can transfer UE state to

CELL_PCH instead of IDLE mode which is in legacy Fast Dormancy

processing.

Some intelligent UEs support Fast dormancy function. To save the power,

when there is no PS data transfer, UE can send a SCRI message to

require RNC release the RRC connection and then periodically send

heartbeat message to the core network, without implementation of this

feature, RNC will release the RRC connection, then each of the following

heartbeat messages will cause RRC connection setup, authentication,

encryption and RAB setup procedures. Comparing to normal PS call

procedure, this Fast dormancy mechanism will greatly increase the

signaling processing cost of RNC and may cause overflow of signaling

processing unit in RNC.


35pt

32pt

) :18pt

Page 7

EFD BASIC PRINCIPLE

With this feature, when receiving SCRI from UE or UE inactivity timer

expires, RNC will decided to transfer the state of the UE to CELL_PCH

instead of IDLE mode. When UE periodically sends heartbeat message,

RNC will reconfigure UE to CELL_FACH or CELL_DCH. The signaling

procedure between UE and RNC will be limited to only a few message

exchanges because the RRC connection keep existing, at least 40%

signaling exchange can be reduced and RNC CPU resources can be

saved significantly while UE battery consumption is saved as much as

that in IDLE mode.

(Refer to CELL_PCH Solution and Report)


35pt

32pt

) :18pt

Page 8

EFD BASIC PRINCIPLE FD and EFD Different Signal Flow


35pt

32pt

) :18pt

Page 9

EFD BASIC PRINCIPLE Huawei Solution

When receiving SCRI message, if one of the following condition is met, RNC will look the UE as FAST DORMANCY capable, initial this feature

and transfer UE to CELL_PCH state:

IMEI of the UE belongs to the range of IMEIs defined by operator configuration(TAC White List).

The cause value in SCRI message is "UE Requested PS Data session end.

When UE inactivity timer expires, if IMEI of the UE belongs to the range of IMEIs defined by operator configuration, the UE will be transferred to

CELL_PCH state instead of IDLE state.

Please be aware that when SCRI without cause value was sent and smart phone will be transferred to CELL_PCH state which might have the

risk of incompatibility. In this case, we strongly suggest providing the

feature together with Huawei professional services.


35pt

32pt

) :18pt

Page 10

EFD BASIC PRINCIPLE TAC White List


35pt

32pt

) :18pt

Page 11

Influence Summary Same as CELL_PCH

The PS call drop rate will increase. It is mainly caused by call drop in CELL_PCH state. As the call drop in CELL_PCH state will not influence the experience of UE. R&D suggest to subtract the PS call drop in

CELL_PCH state and X2P process and using new PS call drop KPI to monitor the performance.

some data transfer will be execute in FACH state by X2F process. The data volume in FACH will increase. Some cell will suffer FACH congestion, it is normal.

PS RAB ATT times will decrease in evidence due to UE keep in CELL_PCH status long time. The cell update times will increase in evidence due to NE states transfer. If the strategy of multi-carrier is preferred camp on, the PS RAB setup successful rate may decrease. Because the PS RAB times failed in DRD process may almost same as CELL_PCH before, and the PS

RAB times will reduce sharply. The ratio of PS RAB access may decrease. It do not influence the UE

experience.

When activating CELL_PCH, the PS user, which in idle state before, will transfer to PCH state and keep signaling connection with PS CN domain. The USER Number will increase same as CELL_PCH.

We will update the KPI report after solution implementation


35pt

32pt

) :18pt

Page 12

MDT

Activity


35pt

32pt

) :18pt

Page 13

EXP INNERCFGMML EXP CFGMML

Before the MDT activity, backup the CFGMML for current values of related parameters.

In the rollback process will be change to current values.

EXP CFGMML;


35pt

32pt

) :18pt

Page 14

ACT LICENSE

Active license file enable EFD

ACT LICENSE: FN="*****.dat";


35pt

32pt

) :18pt

Page 15

SCCPCH Expansion

After active CELL_PCH, more UEs will be carried on FACH&PCH, so we

need to add second SCCPCH in the RNC for all Cell avoiding congestion

SCCPCH Expansion

MDT Duration:20-40(Minuters)

Service Interrupted During MDT: Yes

Impact on Network Performance: None


35pt

32pt

) :18pt

Page 16

MOD ADJMAP

NOTE: After this feature is enabled, the number of UEs in CELL_PCH or URA_PCH state increases sharply. UEs

in CELL_PCH or URA_PCH state consume a large number of Iu-PS resources although they do not

transmit any data.

To avoid the admission failure on the Iu-PS interface due to the increase of UEs in CELL_PCH or

URA_PCH state, change the Iu-PS activation factor.

CAUTION: The Iu-PS activation factor must be modified. Otherwise, the CPU occupancy of the SPU board will be

raised sharply.

The recommended value for the activation factor is 10%. If the configured Iu-PS activation factor is smaller than 10%, retain the configured value.

MOD TRMFACTOR: FTI=*****, PSCONVDL=10, PSCONVUL=10, PSSTRMDL=10, PSSTRMUL=10, PSINTERDL=10, PSINTERUL=10, PSBKGDL=10, PSBKGUL=10, HDSRBDL=10, HDSIPDL=10,

HDVOICEDL=10, HDCONVDL=10, HDSTRMDL=10, HDINTERDL=10, HDBKGDL=10, HUSRBUL=10,

HUSIPUL=10, HUVOICEUL=10, HUCONVUL=10, HUSTRMUL=10, HUINTERUL=10, HUBKGUL=10,

EFACHDL=10;

MOD ADJMAP: ANI=****, ITFT=IUPS, FTI=*****;


35pt

32pt

) :18pt

Page 17

SET URRCTRLSWITCH

Enabling the enhanced fast dormancy feature at the RNC level

SET URRCTRLSWITCH: PROCESSSWITCH=FAST_DORMANCY_SWITCH-1;

SET UCORRMALGOSWITCH: DraSwitch=DRA_HSDPA_STATE_TRANS_SWITCH-1&DRA_HSUPA_STATE_TRANS_SWITCH-1& DRA_PS_BE_STATE_TRANS_SWITCH-

1&DRA_PS_NON_BE_STATE_TRANS_SWITCH-1;

SET UCORRMALGOSWITCH: DraSwitch=DRA_DCCC_SWITCH-1&DRA_HSUPA_DCCC_SWITCH-1;


35pt

32pt

) :18pt

Page 18

SET URRCTRLSWITCH

Cell update is allowed during CS service setup.

SET URRCTRLSWITCH: RsvdPara1=RSVDBIT1_BIT21-0;

Enable the state transition from CELL_PCH to CELL_DCH triggered by FACH congestion.


Disabling the state transition from CELL_DCH to CELL_PCH triggered by UEs



35pt

32pt

) :18pt

Page 19

SET UPSINACTTIMER Timer & 4A Threshold

Setting Fast Dormancy value of the CELL_DCH inactivity timer SET UPSINACTTIMER: PsInactTmrForFstDrmDch=5;

Setting Fast Dormancy value of the CELL_FACH inactivity timer SET UPSINACTTIMER: PsInactTmrForFstDrmFach=5;

Setting Fast Dormancy value of the CELL_PCH inactivity timer SET UPSINACTTIMER: PsInactTmrForPreFstDrm=1800;

Setting Fast Dormancy traffic threshold for event 4A that triggers the CELL_FACH to CELL_DCH state transition to D1024

SET UUESTATETRANS: FastDormancyF2DHTvmThd=D1024;

T323(R8 FD) SET UCONNMODETIMER:T323=D120;

SET UUESTATETRANSTIMER:BEF2PSTATETRANSTIMER=5,BED2FSTATETRANSTIMER=5,BEH2FSTATE

TRANSTIMER=5,BEE2FSTATETRANSTIMER=5;

SET UPSINACTTIMER: PsInactTmrForInt=1800, PsInactTmrForBac=1800; SET UUESTATETRANS: BeF2DTvmThd=D1024, BeF2HTvmThd=D1024,BeF2ETvmThd=D1024;


35pt

32pt

) :18pt

Page 20

SET URRCTRLSWITCH

Enabling the IMEI TAC match function

SET URRCTRLSWITCH: PROCESSSWITCH=FD_TAC_MATCH_SWITCH-1;



35pt

32pt

) :18pt

Page 21

ADD UIMEITAC

Adding the IMEI TAC of the Smart Phone ADD UIMEITAC: TAC_FUNC=Fast_Dormancy, TAC=********, Description="iPhone", FastDormancy=ON;

ADD UIMEITAC: TAC_FUNC=Fast_Dormancy, TAC=1275300, Description="iPhone 1275300", FastDormancy=ON;


35pt

32pt

) :18pt

Page 22

ADD UCELLALGOSWITCH

Enabling the enhanced fast dormancy feature at the cell level(Default is open in cell configuration)

ADD UCELLALGOSWITCH: CellId=11111, NBMCacAlgoSwitch=FAST_DORMANCY_ADCTRL-1;


35pt

32pt

) :18pt

Page 23

Test and Rollback

Test DT test for make sure the service is OK and monitor KPI

Rollback If the Test fail and we will rollback the old values for each parameters as

backup CFGMML through same command as up steps.

Report We will monitor the KPI for one week and analyses report will issue in the

2nd week.


Thank you www.huawei.com

Saudi STC Signal Storm EFD V2.2

Documents

Transcript of Saudi STC Signal Storm EFD V2.2