RLC/MAC Uplink Transfer

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Neal Rich
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1 FORMATION GPRS - TD SIB RLC/MAC Uplink Transfer Access procedure: one phase access CHANNEL REQUEST One Phase Access IMMEDIATE ASSIGNMENT Request Reference / PDCH description / TBF parameters IMMEDIATE_ASSIGNMENT TBF_assignment = 1 PACKET_CHANNEL_DESCRIPTION TN = 110 TSC = 001 NON_HOPPING = 0 ARFCN = 15 D REQUEST_REFERENCE RA = 79 H T1 = 9 D T3 = 8 D T2 = 2 D TIMING_ADVANCE TIMING_ADVANCE_Value = 0 D IA_PACKET_UPLINK_ASSIGNMENT TFI_ASSIGNMENT = DYNAMIC_ALLOCATION USF = 2 D USF_GRANULARITY = 0 CHANNEL_CODING_COMMAND CS2 = 01

TN = 110 TSC = 001 NON_HOPPING = 0 ARFCN = 15 D REQUEST_REFERENCE RA = 79 H T1 = 9 D T3 = 8 D T2 = 2 D TIMING_ADVANCE

2 RLC/MAC Uplink Transfer Access procedure: one phase access TLLI / Data RLC_MAC_UL_HEADER: Payload Type = 00 --> Uplink RLC Data block Countdown Value = 1h TFI = 8h TI = 1 --> TLLI field is present BSN = 0h TLLI[0] = 90h TLLI[1] = 8h TLLI[2] = EAh TLLI[3] = 35h LLC PDU: Address Field: C/R bit = 0 --> Command of MS to SGSN SAPI = > LLGMM Control Field: UI Format: 110b is UI Format = 6h Unconfirmed sequence number = 0h Encryption mode bit = 0 --> not encrypted Protected mode bit = 1 --> Protected L3Message: Protocol Discriminator = 1000 :GPRS MM Message Attach Request: Attach Type: > GPRS attach Type of identity = > TMSI/P-TMSI Identity octets[1] = D0h Identity octets[2] = 8h Identity octets[3] = EAh Identity octets[4] = 35h Location Area Id: MCC_Digit2 = 0h MCC_Digit1 = 2h MNC_Digit3 = Fh MCC_Digit3 = 8h MNC_Digit2 = 1h MNC_Digit1 = 0h Location Area Code = 3900h RAC = 1h RLC/MAC Uplink Transfer Access procedure: one phase access TLLI / Data PACKET UPLINK ACK / NACK TLLI RLC_MAC_UL_HEADER: CountdownValue = 0000 TFI = 08 BSN = 01 TLLI = 90 H TLLI = 08 H TLLI = EA H TLLI = 35 H PayloadType = 01 RRBP = 00 S_P = 0 USF = 00 H PACKET_UPLINK_ACK_NACK UPLINK_TFI = 8 D ACK_NACK_DESCRIPTION FINAL_ACK_INDICATION = 1 STARTING_SEQUENCE_NUMBER = 2 D RECEIVED_BLOCK_BITMAP = CONTENTION_RESOLUTION_TLLI = 35EA0890 H

Unconfirmed sequence number = 0h Encryption mode bit = 0 --> not encrypted Protected mode bit = 1 --> Protected L3Message: Protocol Discriminator = 1000 :GPRS MM Message Attach Request: Attach Type:

3 RLC/MAC Uplink Transfer ( ) Access procedure: two phase access Le réseau peut décider Two Phase Access même si le MS a demandé One Phase Access CHANNEL REQUEST Single block packet access IMMEDIATE ASSIGNMENT Request Reference / Single block description PACKET RESOURCE REQUEST TLLI / MS Radio Access Capability / Channel Request description PACKET UPLINK ASSIGNMENT TLLI / PDCH description / TBF parameters Data RLC/MAC Uplink Transfer ( ) Normal TBF Release CV=1 CV=0 PACKET UPLINK ACK / NACK S/P=1 / FAI=1 PACKET CONTROL ACK MS back to idle mode

block packet access IMMEDIATE ASSIGNMENT Request Reference / Single block description PACKET RESOURCE REQUEST TLLI / MS Radio Access

4 GPRS Mobility Management Attach Procedure Demande les services GPRS Equivalent à l IMSI Attach ATTACH REQUEST Identity / Old RAI / Radio Capabilities ATTACH ACCEPT RAI / Timer (Identity / Ready Timer) ATTACH COMPLETE ATTACH COMPLETE est envoyé par le MS si un nouveau P-TMSI (ou TMSI) a été inclu dans le message ATTACH ACCEPT GPRS Mobility Management ( ) Detach Procedure initié par le MS Detach sans power off DETACH REQUEST Normal Detach T3321 DETACH REQUEST Normal Detach DETACH ACCEPT Detach avec power off DETACH REQUEST Power switched off

(ou TMSI) a été inclu dans le message ATTACH ACCEPT GPRS Mobility Management (24.008 4.7.

5 GPRS Mobility Management Detach Procedure initié par le network Utilisé dans le cas où une procédure de re-attach doit être effectué par le MS Utilisé pour refuser le MS (cause spécifié par le Network) Network indique si la procédure de re-attach est requise DETACH REQUEST Re-attach required or not / (GMM Cause) DETACH ACCEPT GPRS Mobility Management ( ) Routing Area Update Procedure Similère à la procedure Attach Initié par le MS en frontière de RA ROUTING AREA UPDATE REQUEST Identity / Old RAI / Radio Capabilities ROUTING AREA UPDATE ACCEPT RAI / Periodic RA Timer / (Mobile Identity / Ready Timer) ROUTING AREA UPDATE COMPLETE RAU Complete est envoyé par le MS si une nouvelle identité est incluse dans le message RAU Acccept

5) Routing Area Update Procedure Similère à la procedure Attach Initié par le MS en frontière de RA ROUTING AREA UPDATE REQUEST Identity / Old RAI / Radio Capabilities ROUTING AREA

6 RLC/MAC Downlink Transfer ( ) Paging Procedure Paging message envoyé dans toutes les cellules de la RA Paging message contient l identité du MS PAGING REQUEST Mobile Identity / Packet Page Indication Empty LLC Frame RLC/MAC Downlink Transfer ( ) Immediate Assignment DL MS est dans l état Ready Paging Request message n est pas nécessaire Direct downlink TBF est alloué IMMEDIATE ASSIGNMENT Packet Downlink Assignment Optional PACKET CONTROL ACKNOWLEDGEMENT Data Data

PAGING REQUEST Mobile Identity / Packet Page Indication Empty LLC Frame 3) Immediate Assignment DL MS est dans l état

7 RLC/MAC Downlink Transfer Packet DL Assignment IA alloue simple 1 slot en Downlink Pour plusieurs timeslots? Packet Downlink Assignment? Packet Timeslot Reconfigure IMMEDIATE ASSIGNMENT Packet Downlink Assignment (one timeslot) Optional PACKET CONTROL ACKNOWLEDGEMENT PACKET DOWNLINK ASSIGNMENT TFI / Timeslot Allocation = more than one timeslot Multislot Data Normal TBF Release RLC/MAC Downlink Transfer Data / S/P=1 / FBI=1 PACKET DOWNLINK ACK / NACK FAI=0 Data Data / S/P=1 / FBI=1 PACKET DOWNLINK ACK / NACK FAI=1 T3192 MS back to idle mode

PACKET DOWNLINK ASSIGNMENT TFI / Timeslot Allocation = more than one timeslot Multislot Data Normal TBF Release RLC/MAC Downlink

8 RLC/MAC Downlink Transfer Packet PDCH Release Envoyé par le Network pour indiquer qu un ou plusieurs PDCH vont être libérés 4 timeslots allocated PACKET PDCH RELEASE Timeslots available = 2 2 timeslots allocated PACKET PDCH RELEASE Timeslots available = 0 MS back to idle mode Packet TBF Release RLC/MAC Downlink Transfer Envoyé par le réseau pour libérer TBF Downlink et/ou TBF Uplink UL + DL TBF PACKET TBF RELEASE Release UL TBF DL TBF PACKET TBF RELEASE Release DL TBF MS back to idle mode

available = 0 MS back to idle mode Packet TBF Release RLC/MAC Downlink Transfer Envoyé par le réseau pour libérer TBF

9 Session Management PDP Activation ACTIVATE PDP CONTEXT REQUEST NSAPI / LLC SAPI / QoS / (APN / Protocol Configuration) T3380 ACTIVATE PDP CONTEXT REQUEST NSAPI / LLC SAPI / QoS / (APN / Protocol Configuration) ACTIVATE PDP CONTEXT ACCEPT LLC SAPI / QoS / (PDP address / Protocol Configuration) ACTIVATE PDP CONTEXT REJECT Cause Session Management MS PDP Deactivation DEACTIVATE PDP CONTEXT REQUEST Cause T3390 DEACTIVATE PDP CONTEXT REQUEST Cause DEACTIVATE PDP CONTEXT ACCEPT

LLC SAPI / QoS / (PDP address / Protocol Configuration) ACTIVATE PDP CONTEXT REJECT Cause Session Management MS PDP

10 Session Management Network PDP Deactivation DEACTIVATE PDP CONTEXT REQUEST Cause DEACTIVATE PDP CONTEXT ACCEPT

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