11.2.1 Packet Access Reject

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 PACCH by the network to the mobile station to indicate that the network has rejected the MSs access request. This message may contain fields addressing more than one mobile station.

Message type: PACKET ACCESS REJECT

Direction: network to mobile station

Classification: distribution message

Table 11.2.1.1: Packet ACCESS REJECT information elements

< Packet Access Reject message content > ::=

< PAGE_MODE : bit (2) >

< Reject : < Reject struct > >

{ { 1 < Additional Reject: < Reject struct > > } ** 0

{ null | 0 bit ** = < no string > — Receiver compatible with earlier releases

| 1 — Additions in release 5

{ 1 < Iu mode Reject: < Iu mode Reject struct > > } ** 0

{ null | 0 bit ** = < no string > — Receiver compatible with earlier releases

| 1 — Additions in release 6

{ 1 < A/Gb mode Reject: < A/Gb mode Reject struct > > } ** 0 }

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

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

< Reject struct > ::=

{ 0 < TLLI / G-RNTI : bit (32) >

| 1 { 0 < Packet Request Reference : < Packet Request Reference IE > >

| 1 < Global TFI : < Global TFI IE > > } }

{ 0 | 1 < WAIT_INDICATION : bit (8) >

< WAIT _INDICATION_SIZE : bit (1) > }

! < Ignore : bit (*) = <no string> > ;

< Iu mode Reject struct > ::=

< G-RNTI_extension : bit (4) >

{ 0 — all TBF requests for the MS identified by the G-RNTI in the corresponding Reject structare rejected

| { 1 < RB Id : bit(5) > } ** 0 } ; — TBF requests for these RB Ids are rejected

< A/Gb mode Reject struct > ::=

{ 0 — all TBF requests for the MS identified by the TLLI in the corresponding Reject struct are rejected

| { 1 < PFI : bit (7) > } ** 0 } ; — TBF requests for these PFIs are rejected

Table 11.2.1.2: Packet ACCESS REJECT information element details

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

Reject struct
The mobile station shall only accept the first Reject struct addressed to it and ignore all other Reject structs.

Iu mode Reject struct

For each occurrence of a G-RNTI in the TLLI / G-RNTI field of a Reject struct, a corresponding Iu mode Reject struct shall be included in the message. The list of Iu mode Reject structs shall address the Iu mode mobile stations in the same order as the list of G-RNTI values in the Reject structs.

A/Gb mode Reject struct

For each occurrence of a TLLI in the TLLI / G-RNTI field of a Reject struct, a corresponding A/Gb mode Reject struct shall be included in the message. The list of A/Gb mode Reject structs shall address the A/Gb mode mobile stations in the same order as the list of TLLI values in the Reject structs.

Packet Request Reference
This information element shall be included if the PACKET ACCESS REJECT message is sent in response to a PACKET CHANNEL REQUEST message. This information element is defined in sub-clause 12.11.

TLLI / G-RNTI (32 bit field)
This information field shall be included if the PACKET ACCESS REJECT message is sent in response to a PACKET RESOURCE REQUEST message or a Channel Request Description IE contained in a PACKET DOWNLINK ACK/NACK message. This information field is defined in sub-clause 12.16.

G-RNTI extension (4 bit field)
This field contains the extra 4 bits of the G-RNTI not included in the TLLI / G-RNTI field which are necessary to provide a unique identifier for contention resolution in Iu-mode.

For each occurrence of the TLLI / G-RNTI field in the Reject struct, the corresponding G-RNTI extension field shall be included in the Iu mode reject struct in the same order as the list of G-RNTI values in the TLLI / G-RNTI field.

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

WAIT_INDICATION (8 bit field)
The Wait Indication field indicates the time the mobile station shall wait before attempting another channel request. This field is coded as the binary representation of the T3172 timeout value in units of 20 ms or in units of seconds. The units are indicated in the WAIT_INDICATION_SIZE field.
Range 0 to 255.

WAIT_INDICATION_SIZE (1 bit field)
This field indicates the units of the WAIT_INDICATION field.

0 the WAIT_INDICATION field is coded in units of s
1 the WAIT_INDICATION field is coded in units of 20 ms

RB Id (5 bit field)
This field contains the identifier of the radio bearer for which a TBF was requested.

PFI (7 bit field)

This field contains the PFI parameter identifying a Packet Flow Context. The PFI parameter is encoded as the contents of the PFI information element defined in 3GPP TS 44.018.