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

| 1 — Additional contents for Release 1999

{ 0 | 1 < EGPRS BEP Link Quality Measurements :

< EGPRS BEP Link Quality Measurements IE >> }

{ 0 | 1 < EGPRS Timeslot Link Quality Measurements :

< EGPRS Timeslot Link Quality Measurements IE >>}

{ 0 | 1 < PFI: bit(7) > }

< ADDITIONAL MS RAC INFORMATION AVAILABLE : bit (1) >

< RETRANSMISSION OF PRR : bit (1) >

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

| 1 — Additions for Rel-5

{ 0 | 1 { 0 | 1 < G-RNTI extension : bit (4) > }

< Iu mode Channel Request Description : < Iu mode Channel Request Description IE > > }

{ 0 | 1 < HFN_LSB : bit (1) > }

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

| 1 — Additional contents for Release 6

{ 0 | 1 < Extended Channel Request Description :

< Extended Channel Request Description IE > > }

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

| 1 — Additional contents for Release 7

< EARLY_TBF_ESTABLISHMENT : bit (1) >

{ 0 | 1 < EGPRS BEP Link Quality Measurements Type 2 :

< EGPRS BEP Link Quality Measurements Type 2 IE > > }

{ 0 | 1 < EGPRS Timeslot Link Quality Measurements Type 2 :

<EGPRS Timeslot Link Quality Measurements Type 2 IE > > }

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

| 1 — Additional contents for Release 10

< Low Access Priority Signalling : bit (1) >

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

| 1 — Additions in Rel-12

{ 0 | 1 < Downlink_eTFI : bit (3) > }

< padding bits > } } } } } };

ACCESS_TYPE (2 bit field)
This field indicates the reason for requesting the access. It shall be included only in response to a single block or Multi block assignment.

bit
2 1
0 0 Two Phase Access Request
0 1 Page Response
1 0 Cell Update
1 1 Mobility Management procedure

TLLI / G-RNTI
This information element is defined in sub-clause 12.16.

MS Radio Access Capability 2
This information element is defined in sub-clause 12.30. This information element is sent only during two phase access and shall not be include by MS operating in Iu mode. Additionally, this information element shall be sent in one phase EGPRS TBF establishment procedure if ordered by the network.

Channel Request Description
This information element is defined in sub-clause 12.7. If a PFI field is included in this message, it relates to the TBF request contained in the Channel Request Description IE. If the Extended Channel Request Description IE is included in this message, the value of this IE (and the PFI field) shall be ignored. When a Packet Resource Request message is sent in response to an Access Technologies Request received by the MS during a one phase access this IE shall be ignored.

Extended Channel Request Description
This information element is defined in sub-clause 12.7b. This IE contains a request for one or more additional uplink TBFs and shall only be included if the mobile station and the network support multiple TBF procedures. If this IE is included, the Channel Request Description IE and PFI field in the message shall be ignored.

CHANGE_MARK (2 bit field)
This field contains the PSI2_CHANGE_MARK value stored by the mobile station’s if PBCCH is present in the current cell. If PBCCH is not present in the current cell, this field contains the SI13_CHANGE_MARK value stored by the mobile station. If the mobile station does not have a valid PSI2 or SI13 change mark for the current cell, the mobile station shall omit this field. The coding of this field is network dependent.

C_VALUE (6 bit field)
This field is encoded as the binary representation of the C value as specified in 3GPP TS 45.008.
Range 0 to 63

SIGN_VAR (6 bits)
This field contains the signal variance parameter SIGN_VAR calculated by the mobile station (see 3GPP TS 45.008). This field is not present for TBF establishment using two phase access or for a TBF in EGPRS mode.

bit
6 5 4 3 2 1
0 0 0 0 0 0 0dB² to 0.25 dB²
0 0 0 0 0 1 >0.25 dB² to 0.50 dB²
0 0 0 0 1 0 >0.50 dB² to 0.75 dB²
: : :
1 1 1 1 1 0 >15.50 dB² to 15.75 dB²
1 1 1 1 1 1 >15.75 dB²

I_LEVEL_TN0 (4 bit field)
I_LEVEL_TN1 (4 bit field)
I_LEVEL_TN2 (4 bit field)
I_LEVEL_TN3 (4 bit field)
I_LEVEL_TN4 (4 bit field)
I_LEVEL_TN5 (4 bit field)
I_LEVEL_TN6 (4 bit field)
I_LEVEL_TN7 (4 bit field)
For element definition see sub-clause 11.2.6 – Packet Downlink Ack/Nack. These fields shall not be present if they are included in the EGPRS Timeslot Link Quality Measurements IE.

EGPRS BEP Link Quality Measurements
This information element is defined in sub-clause 12.5.3. This IE is transferred if it is available and if it would not cause the message to expand beyond one RLC/MAC control block and if the PACKET RESOURCE REQUEST is sent during on-going concurrent EGPRS TBF.

EGPRS Timeslot Link Quality Measurements
This information element is defined in sub-clause 12.5.4. This IE is transferred if it is available and if it would not cause the message to expand beyond one RLC/MAC control block and if the PACKET RESOURCE REQUEST is sent during on-going concurrent EGPRS TBF.

PFI (7 bit field)
This field contains the PFI parameter identifying a Packet Flow Context relating to the resource request specified in the Channel Request Description IE. The PFI parameter is encoded as the contents of the PFI information element as defined in 3GPP TS 44.018. This field may be included if the network supports packet flow context procedures. If the Extended Channel Request Description IE is included in this message, the value of this field (and the Channel Request Description IE) shall be ignored.

ADDITIONAL MS RAC INFORMATION AVAILABLE (1 bit field)
0 indicates that the MS will not send more information about its radio access capabilities than included in this message
1 indicates that the MS will provide more information about its radio access capabilities by sending an ADDITIONAL MS RADIO ACCESS CAPABILITIES message, either in the next radio block allocated to the mobile station on the assigned PDCH, or upon a further request from the network if the mobile station was allocated only one radio block. This value shall not be used by MS operating in Iu mode.

RETRANSMISSION OF PRR (1 bit field)
This field indicates whether the corresponding PACKET RESOURCE REQUEST message is a retransmission. In case the PACKET RESOURCE REQUEST message is a retransmission, the message content (except this field and the address information) shall be identical to the PACKET RESOURCE REQUEST message previously sent (see sub-clause 7.1.2.2.1a).

0 indicates that this message is an initial PACKET RESOURCE REQUEST message
1 indicates that this message is a retransmitted PACKET RESOURCE REQUEST message; in this case the corresponding PACKET RESOURCE REQUEST message shall not be interpreted as a request for resource reassignment.

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.

HFN_LSB (1 bit field)

This field contains the least significant bit of the uplink HFN of the radio bearer for which the TBF is requested.

EARLY_TBF_ESTABLISHMENT (1 bit field)

This field indicates whether or not the packet resource request is meant to request pre-allocation of an uplink TBF:

0 The packet resource request is not meant to pre-allocate an uplink TBF.
1 The packet resource request is meant to pre-allocate an uplink TBF.

EGPRS BEP Link Quality Measurements Type 2
This information element is defined in sub-clause 12.5a.2. This IE is transferred if it is available and if it would not cause the message to expand beyond one RLC/MAC control block and if the PACKET RESOURCE REQUEST is sent during on-going concurrent EGPRS2 TBF.

EGPRS Timeslot Link Quality Measurements Type 2
This information element is defined in sub-clause 12.5a.3. This IE is transferred if it is available and if it would not cause the message to expand beyond one RLC/MAC control block and if the PACKET RESOURCE REQUEST is sent during on-going concurrent EGPRS2 TBF.

Low Access Priority Signalling

This field allows a mobile station to indicate whether it is requesting a packet access for the purpose of NAS signalling low priority (see sub-clause 7.1.3.1).

0 Indicates the PACKET RESOURCE REQUEST message is sent for requesting a packet access for a different purpose than NAS signalling low priority

1 Indicates the PACKET RESOURCE REQUEST message is sent for requesting a packet access for the purpose of NAS signalling low priority

DOWNLINK_eTFI (3 bit field)
See sub-clause 11.2.48