GO_NA36_E1_1 GPRS Data Service Signaling Process-54

7/28/2019 GO_NA36_E1_1 GPRS Data Service Signaling Process-54

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GPRS Data Service Signaling

Process

ZTE University



Contents

Cell re-selection Process

Wireless Link and Media Access Control Process

GPRS Mobility Management Process

GPRS Session Management Process FTP/PING Signaling Process

WAP Signaling Process

SMS / MMS Signaling Process



Cell re-selection in packet idle state

PACCH

MS BSS

PACKET MEASUREMENT ORDER

PACKET CHANNEL REQUEST

PACKET MEASUREMENT REPORT

PACKET UPLINK ASSIGNMENT

PCCCH

PACKET CELL CHANGE ORDER

PRACH

PAGCH

PCCCH



Cell re-selection on CCCH

AGCH

PACCH

PACCH


CHANNEL REQUEST


IMMEDIATE ASSIGNMENT

CCCH

RACH

PACCH




MS

AGCH

BSS



Cell re-selection in the packet transmission

state


MS BSS



PACCH

PACCH

PACCH

PACKET CONTROL ACK

(Packet)CHANNEL REQUEST

RACHPRACH

NEWCELL

……

IMM ASS/Packet Up/Downlink ASSAGCH

PAGCH

PACCH



Contents

Cell re-selection Process

Wireless Link and Media Access Control Process







Packet paging


MS BSS

（PACKET）PAGING REQUEST

IMM ASSIGN//Packet Downlink Ass

AGCH/PAGCH

RACH/PRACH

（PTMSI/IMSI） PCH/PPCH



TBF establishment

The TBF establishment can be initiated from both the MS

and the network. If the cell has been configured with

PCCCH channel, the TBF establishment can be innitiated

from the PCCCH; If the cell has not configured with

PCCCH channel, the TBF establishment will be innitiated

from the CCCH.

If the MS is monitoring the PCCCH at packet idle mode,

the measurement report is not sent through the uplink TBF,

but through the assigned PACCH.





One-stage access on CCCH/PCCCH


MS

IMM Assign/Packet Uplink AssAGCH/PAGCH

RACH/PRACH

BSS

Packet Uplink Ack/Nack(TLLI)

Packet Uplink Ack/Nack(TLLI)

RLC DATA BLOCK( TLLI)

RLC DATA BLOCK( TLLI)

RLC DATA BLOCK(Without TLLI)

PACCH

PACCH

PDTCH

PDTCH

PDTCH

......



Two-stage access on CCCH/PCCCH


MS

IMM ASSIGN/Packet Uplink AssAGCH/PAGCH

RACH/PRACH

BSS

Packet Uplink Assign(with TLLI)

Packet Uplink Ack/Nack

Packet Resource Request(with TLLI)

RLC DATA BLOCK

RLC DATA BLOCK

PACCH

PACCH

PACCH

PDTCH

PDTCH

......



Establishment of PACCH uplink TBF

MS

RLC DATA BLOCK PDTCH

BSS

Packet Uplink Assignment

Packet Uplink Ack/Nack

Packet Downlink Ack/Nack

Channel request

RLC DATA BLOCK

RLC DATA BLOCK

PACCH

PACCH

PACCH

PDTCH

PDTCH

......



Downlink TBF Establishment

The downlink TBF establishment can be initiatedby RR entity application packet downlink

assigning from the network. When the MS is in

packet idle mode, the user can use packet

downlink assigning on the PCCCH or CCCH toassign a TFI and designate the downlink PDCH

channel for the downlink TBF.



Establishment of CCCH/PCCCH donwlink

TBF

MS

IMM ASSIGN/Packet Downlink AssAGCH/PAGCH

BSS

Packet Control Acknowledgement(AB)

TIMING ADVANCE

Packet Polling request(With TFI)

RLC DATA BLOCK

PACCH

PTCCH

PACCH

PDTCH

PACCH

......

Packet Power Ctrl/Timing Advance



Establishment of PACCH downlink TBF

PDTCH

MS

RLC DATA BLOCK

BSS

Packet Downlink Assignment

Or Packet Timeslot Reconfigue

RLC DATA BLOCK

PACCH

PDTCH

......

......



Packet Queuing

Packet Channel Request

MS

Packet Queuing Notification(TQI)PAGCH

PRACH

BSS

Packet Polling Request(TQI)

Packet Control Ackowledgement

Packet Uplink Assignment(TQI)

PAGCH

PACCH

No source

PACCH

......

......

PACCH

PACCH

PAGCHSource OK



GPRS Resuming

If the MS in packet transmission mode initiatesGSM circuit service, while it cannot conduct GPRS

service and GSM circuit service at the same time,

it will request the network to suspend the on-going

GPRS service. When the GSM circuit service isended, the network will inform the MS of resumed

GPRS service.



GPRS suspending

2. Suspend

8. RLC DATA BLOCK

1. Dedicated Mode Entered

MS BSS SGSN MSC/VLR

3. Suspend

5. Resume

7. Channel Release

4. Suspend Ack

6. Resume Ack

……..



Releasing uplink TBF in verification mode

MS BSS

Packet Uplink Ack/Nack(FAI=1)

Packet Control Ack PACCH

TBF Release

PACCH

......

PDTCHRLC DATA BLOCK(CV=1)

RLC DATA BLOCK(CV=0)PDTCH

TBF

Release

Packet Uplink Ack/Nack PACCH



Releasing uplink TBF in non-verification mode

MS BSS

Packet Uplink Ack/Nack(FAI≠1)

Packet Control Ack PACCH

TBF Release

PACCH

......

PDTCHRLC DATA BLOCK(CV=1)

RLC DATA BLOCK(CV=0)

PDTCH

TBF

Release

Packet Uplink Ack/Nack(FAI=1)PACCH

RLC DATA BLOCK(CV=0)PDTCH



Releasing downlink TBF in verification mode

MS BSS

Packet Downlink Ack/Nack

PACCH

TBF Release

PDTCH

......

PDTCH

RLC DATA BLOCK （BSN=79）

PACCH

TBF

Release

PDTCH

RLC DATA BLOCK(BSN=80/FBI=1)

Packet Downlink Ack/Nack(FAI=1)

RLC DATA BLOCK （BSN=79）



Releasing downlink TBF in non-verification

mode

MSBSS

Packet Downlink Ack/Nack(FAI≠1)

PACCH

TBF Release

PDTCH

......

PDTCHRLC DATA BLOCK （BSN=79）

PACCH

TBF

Release

PDTCH

RLC DATA BLOCK(BSN=80/FBI=1)

Packet Downlink Ack/Nack(FAI=1)

RLC DATA BLOCK （BSN=80/FBI=1）



Contents

Cell re-selection Process Wireless Link and Media Access Control Process







Attach Process 1



Attach Process 2



GPRS detachment initiated by MS

3. IMSI Detach Indication

2. Delete PDP Context Response

1. Detach Request

2. Delete PDP Context Request

5. Detach Accept

MS BSS GGSNSGSN MSC/VLR

4. GPRS Detach Indication



GPRS detachment initiated by SGSN

2. Delete PDP Context Res onse

1. Detach Request

2. Delete PDP Context Re uest

4. Detach Acce t

MS BSS GGSNSGSN MSC/VLR




GPRS detachment initiated by HLR

HLR MS BSS GGSNSGSN MSC/VLR

3. Delete PDP Context Request

1. Cancel Location


2. Detach Request

6. Cancel Location Ack

3. Delete PDP Context Response

5. Detach Accept



Routing Area Update wihin SGSN



Routing Area Update between SGSN



Combined RA/LA update within SGSN

4b. Cancel Location

4c. Cancel Location Ack

4e. Insert Subscriber Data Ack

4d. Insert Subscriber Data

HLR MS BSS

new

MSC/VLR SGSN

old

MSC/VLR

3. Location U pdate Request

1. Routeing Area Update Request

2. Security Functions

4a. Update Location

4f. Update Location Ack

8. TMSI Reallocation Complete

6. Routeing Area Update Accept

5. Location Update Accept

7. Routeing Area Update Complete



Combined Routing update between SGSNMS BSS new SGSN HLR GGSNold SGSN MSC/VLR

2. SGSN Context Response


1. Routeing Area Update Request

2. SGSN Context Request

6. Update PDP Context Request

6. Update PDP Context Response

7. Update Location

10. Update Location Ack

12. Routeing Area Update Accept

11. Location Updating Reques t

11. Location Updating Accept

8. Cancel Location

8. Cancel Location Ack

9. Insert Subscriber Data Ack

9. Insert Subscriber Data

13. Routeing Area Update Complete

5. Forward Packets

4. SGSN Context Acknowledge



Contents








GPRS Session Management Process

In GPRS system, data transmission focuses on the PDPcontext. The session managment refers to the activation,

modificaiton and deactivation of PDP context. Session

managment involces the GPRS core network and MS, and

has no direct relation with BSS. By PDP context activation,

the network assigns an IP address for the MS and thusincludes it into the IP network. After the PDP context is

activated, the network can modify the PDP context through

PDP context modification so as to conduct data

transmission more effectively. After the data transmissionis completed, the network can end the PDP context

through PDP context deactivation and release the IP

address that was assigned to the MS.



PDP context activation initiated by MS

GGSN

4. Activate PDP Context Accept

3. Create PDP Context Response

3. Create PDP Context Request

1. Activate PDP Context Request

SGSNMS




PDP context activation requested by network

MS SGSN GGSN

4． PDU Notification Request

HLR

1 PDP PDU

2 Send Routeing Inf o for GPRS

3．

Send Routeing Info for GPRS Ack

6．Request PDP Context Activation

7．PDP Context Activation procedure

5． PDU Notification Response



Anonymous access PDP context activation

3. Activate AA PDP Context Accept

2. Create AA PDP Context Response

2. Create AA PDP Context Request

1. Activate AA PDP Context Request

SGSN GGSNMS



PDP context modification

The QoS parameter or wireless priority of the PDP context

may be determined by the SGSN or triggered by HLR. The

SGSN can select to complete the modification through

PDP context modification process or by carrying this

modification requirement in the MM message, such as the

"routing area update accepted " message.



PDP context deactivation initiated by MS

GGSN

5．

Deactivate PDP Context Accept

4．Delete PDP Context Response

3．Delete PDP Context Request

1．Deactivate PDP Context Request

SGSNMS

2．Security Functions



PDP context deactivation initiated by SGSN



PDP context deactivation initiated by SGSN

A PDP t t d ti ti



Anonymous access PDP context deactivation

initiated by MS

2. Delete AA PDP Context Response

2. Delete AA PDP Context Request

1. READY timer expiry

MS SGSN GGSN

A PDP t t d ti ti



Anonymous access PDP context deactivation

initiated by GGSN

GGSN

1. Delete AA PDP Context Request

SGSN

4. Delete AA PDP Context Response

3. Deactivate AA PDP Context Accept

3. Deactivate AA PDP Context Request

MS

2. Identity Response

2. Identity Request



Contents








PING Signaling

PING (Packet Internet Grope) is a DOS command. It is urually used to

check whether the network is blocked or not. It is also called as Delay.The bigger the Ping value, the slower the network.

Ping is also used to test the connection of network. The Pingcommand can send an ICMP echo request to the destinaiton, and willreport whether it has received the expected ICMP echo.

MS

Establishment of uplink TBF

BSS

Receiving Ping packet

Uploading Ping packet

......

Establishment of downlink TBF



FTP Signaling Process

MS

Establishment of uplink TBF

BSS

Receiving packet

Applying for PDP activation

Applying for FTP connection

FTP Server

Confirming PDP activation

Establishment of downlink TBF

Confirming FTP connection

Applying for data download

PDP deactivation



Contents









GET

Connect Reply

ACK

Connect

HTTP OK

MS WAP Gateway HTTP Server GGSN

HTTP GET

Reply







SMS receiving

Forward SM

Forward SM Result

Delivery Report

Send Routing Info For SM result

Send Routing Info For SM

Message Transfer

Message Transfer

MS SMS-G SM-SCSGSN HLR



Sending MMS signaling

Orig MMSC

4．M-delivery.ind

1．M-send.req

WAP GatewayMMS Terminal

2．M-send.conf

Targ MMSC

3．MMS传送



Receiving MMS signaling

Targ MMSC

4．M-notifyresp.ind

1．M-Notification.Ind

WAP GatewayMMS Terminal

2．WSP GET.req

Orig MMSC

MMS传送

3．M-delivery



Documents

GO_NA36_E1_1 GPRS Data Service Signaling Process-54