11.2.16 Packet Resource Request

04.603GPPGeneral Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 1999TS

This message is sent on the PACCH by the mobile station to the network to request a change in the uplink resources assigned.

Message type: PACKET RESOURCE REQUEST

Direction: mobile station to network

Table 11.2.16.1: Packet RESOURCE REQUEST information elements

< Packet Resource Request message content > ::=

{ 0 | 1 < ACCESS_TYPE : bit (2) > }

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

| 1 < TLLI : < TLLI IE > > }

{ 0 | 1 < MS Radio Access Capability 2 : < MS Radio Access Capability 2 IE > > }

< Channel Request Description : < Channel Request Description IE > >

{ 0 | 1 < CHANGE_MARK : bit (2) > }

< C_VALUE : bit (6) >

{ 0 | 1 < SIGN_VAR : bit (6) >}

{ 0 | 1 < I_LEVEL_TN0 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN1 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN2 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN3 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN4 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN5 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN6 : bit (4) > }

{ 0 | 1 < I_LEVEL_TN7 : bit (4) > }

{ 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) >

< padding bits > } ;

Table 11.2.16.2: Packet RESOURCE REQUEST information element details

Global TFI
This information element contains the TFI of the mobile station’s uplink TBF, if available, or the TFI of the mobile station’s downlink TBF. If no TFI is available, this field is omitted. This field is defined in sub-clause 12.10.

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
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.

Channel Request Description
This information element is defined in sub-clause 12.7.

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 05.08.
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 05.08). 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 IE
This information element is defined in sub-clause 12.5.3. These fields are transferred if the data is available and if the fields would not cause the message to expand beyond one RLC/MAC control block and if the PACKET RESOURCE REQUEST is sent during on-going EGPRS concurrent TBF.

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

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 as defined in 3GPP TS 24.008. This field may be included if the network supports packet flow context procedures.

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.

RETRANSMISSION OF PRR (1 bit field)
This field indicates whether the corresponding Packet Resource Request message is a retransmission. In case the PRR message is a retransmission, the message content (except this field and the address information) shall be identical to the one of the PRR which was sent immediately after the uplink TBF was established (and preceding any eventual request for resource reassignment).

0 indicates that this message is an initial Packet Resource Request

1 indicates that this message is a retransmitted Packet Resource Request: in this case the corresponding PRR message shall not be interpreted as a request for resource reassignment.