11.2.5b Packet DBPSCH Assignment

3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS

This message is sent on the PCCCH or the PACCH from the network to the mobile station in Iu mode to assign one or more DBPSCH(s) or a SDCCH to the mobile station.

Message type: PACKET DBPSCH ASSIGNMENT

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.5b.1: PACKET DBPSCH ASSIGNMENT information elements

< Packet DBPSCH Assignment message content > ::=

< PAGE_MODE : bit (2) >

{ 0 | 1 <PERSISTENCE_LEVEL : bit (4) > * 4 }

{ { 0 < Global TFI : < Global TFI IE > >

| 10 < G-RNTI : bit (32) >

| 11 < Packet Request Reference : < Packet Request Reference IE >> }

{ 0 — Message escape

{ < CHANNEL_DESCRIPTION : < Channel Description struct >>

{ 0 | 1 < TIMING_ADVANCE_VALUE : bit (8) > }

< NETWORK_RESPONSE_TIMES : < Network Response Times struct >>

< padding bits > — truncation at end of message allowed, bits ‘0’ assumed

! < Non-distribution part error : bit (*) = < no string > > }

! < Message escape : 1 bit (*) = <no string> > }

! < Address information part error : bit (*) = < no string > > }

! < Distribution part error : bit (*) = < no string > > ;

< Channel Description struct > ::=

< CHANNEL_TYPE : bit (6) >

< DOWNLINK_TIMESLOT_ALLOCATION : bit (8) >

{ 0 — Symmetric uplink and downlink timeslot allocation

| 1 < UPLINK_TIMESLOT_ALLOCATION : bit (8) > } — Asymmetric uplink and downlink timeslot allocation

{ 0 | 1 < USF : bit (3) >

< USF_GRANULARITY : bit (1) > }

< POWER_COMMAND : < Power Command struct > >

{ 0 | 1 < CHANNEL_MODE : bit (8) > }

< TSC : bit (3) >

{ 0 < MAIO : bit (6) >

< HSN : bit (6) >

| 1 < ARFCN : bit (10) > } ;

< Network Response Times struct > ::=

{ 0 — Network’s response times on SDCCH

< RESPONSE_TIME_SDCCH : < Response Time SDCCH struct > >

| 1 — Network’s reponse times on the assigned DBPSCH

< RESPONSE_TIME_SACCH : < Response Time SACCH struct >> — Network’s response time on SACCH

{ 0 — Network’s response time on FACCH/F

— i.e. between a request sent on TCH/F or FACCH/F and the corresponding response sent on FACCH/F

< RESPONSE_TIME_FACCH_F : < Response Time struct >>

| 1 < RESPONSE_TIME_FACCH_H : < Response Time struct >>}}; — Network’s reponse time on FACCH/H

< Response Time SDCCH struct > ::=

< TRMIN_SDCCH : bit (1) > — Network’s minimum response time on SDCCH

< TRESP_SDCCH: bit (1) >; — Network’s maximum response time on SDCCH

< Response Time SACCH struct > ::=

< TRMIN_SACCH : bit (1) > — Network’s minimum response time on SACCH

< TRESP_SACCH: bit (1) >; — Network’s maximum response time on SACCH

< Response Time struct > ::=

< TRMIN : bit (6) >

< TRESP_MAC_DTM : bit (7) >

< TRESP_MAC_Dedicated : bit (7) >;

< Power Command struct > ::= — Provides the power level to be used by the mobile station

{ 0 — Normal power control

| 1 < FPC_EPC : bit (1) > } — Fast or Enhanced Power Control

< POWER_LEVEL : bit (8) >;

Table 11.2.5b.2: PACKET DBPSCH ASSIGNMENT information elements details

PAGE_MODE (2 bit field)
This field is defined in sub-clause 12.20.

PERSISTENCE_LEVEL (4 bit field for each Radio Priority 1…4)
This field is defined in sub-clause 12.14, PRACH Control Parameters.

Global TFI
This information element contains one of the mobile station’s downlink or uplink TFIs. This field is defined in sub-clause 12.10.

G-RNTI (32 bit field)
This field is defined in sub-clause 12.16.

Packet_Request_Reference
This information element is defined in sub-clause 12.11

CHANNEL_TYPE (6 bit field)
This field indicates the type of channel allocated to the mobile station on DBPSCH. The T bits indicate the subchannel number coded in binary. See 3GPP TS 45.002.

bit
6 5 4 3 2 1
0 0 0 0 T T SDCCH/4 + SACCH/C4
0 0 1 T T T SDCCH/8 + SACCH/C8
0 1 0 0 0 0 TCH/F + FACCH/F + SACCH/F
0 1 0 0 1 T TCH/H + FACCH/H + SACCH/TH
0 1 0 1 0 0 PDTCH/F + PACCH/F + SACCH/F
All other values Reserved

DOWNLINK_TIMESLOT_ALLOCATION (8 bit field)
This field is coded as the Timeslot Allocation field defined in sub-clause 12.18. The uplink timeslot allocation is identical to the downlink timeslot allocation given in this field in case the UPLINK_TIMESLOT_ALLOCATION field is not included.

NOTE: Multislot allocation is only possible with a CHANNEL_TYPE indicating TCH or PDTCH.

UPLINK_TIMESLOT_ALLOCATION (8 bit field)
This field is coded as the Timeslot Allocation field defined in sub-clause 12.18. It is included only in case of asymmetric timeslot allocation between downlink and uplink.

NOTE: Multislot allocation is only possible with a CHANNEL_TYPE indicating TCH or PDTCH.

CHANNEL_MODE (8 bit field)
This field is coded as the mode part of the channel mode IE defined in 3GPP TS 44.018. It shall be included only in case a TCH is assigned to the mobile station.

TSC (3 bit field)
This field is the binary representation of the training sequence code, see 3GPP TS 45.002.

Range: 0 to 7.

MAIO (6 bit field)
This field is the binary representation of the mobile allocation index offset (MAIO), see 3GPP TS 45.002.

Range: 0 to 63.

HSN (6 bit field)
This field is the binary representation of the hopping sequence number, see 3GPP TS 45.002.

Range: 0 to 63.

ARFCN (10 bit field)
This field is the binary representation of the absolute radio frequency channel number (ARFCN) defined in 3GPP TS 45.005.

Range 0 to 1023.

TIMING_ADVANCE_VALUE (8 bit field)
This field is defined in 3GPP TS 44.018.

TRMIN_SDCCH (1 bit field)
This field indicates the minimum response time of the network on SDCCH, expressed as a number of TDMA frames.

Bit
1
0 32
1 83

TRESP_SDCCH (1 bit field)
This field indicates the maximum response time of the network on SDCCH, expressed as a number of TDMA frames.

Bit
1
0 134
1 185

TRMIN_SACCH (1 bit field)
This field indicates the minimum response time of the network on SACCH, expressed as a number of TDMA frames.

Bit
1
0 25
1 129

TRESP_SACCH (1 bit field)
This field indicates the maximum response time of the network on SACCH, expressed as a number of TDMA frames.

Bit
1
0 129
1 233

TRMIN (6 bit field)
This field indicates the minimum response time of the network, expressed as a number of TDMA frames.

Bit
6 5 4 3 2 1
0 0 0 0 0 0 9
0 0 0 0 0 1 10
… …
1 1 1 1 1 1 72

TRESP_MAC_DTM (7 bit field)
TRESP_MAC_Dedicated (7 bit field)
These fields indicate for a given MAC state the maximum response time of the network expressed as a number of TDMA frames.

Bit
7 6 5 4 3 2 1
0 0 0 0 0 0 0 14
0 0 0 0 0 0 1 15
…
1 1 1 1 1 1 1 141

FPC_EPC (1 bit field)
This field indicates whether fast power control or enhanced power control (see 3GPP TS 45.008) shall be used. It is coded as follows:

Bit
1
0 FPC in use
1 EPC in use

POWER_LEVEL (8 bit field)
This field is coded as the binary representation of the "power control level", see 3GPP TS 45.005. This value shall be used by the mobile station according to 3GPP TS 45.008.

Range: 0 to 31

USF (3 bit field)
This field indicates the USF value assigned to the MS for all assigned timeslots (range 0 to 7). This field is encoded as a binary representation of the USF value as defined in sub-clause 10.4.1.

USF_GRANULARITY (1 bit field)
This information field indicates the USF granularity to be applied by the mobile station on DBPSCH.

0 the mobile station shall transmit one RLC/MAC block
1 the mobile station shall transmit four consecutive RLC/MAC blocks