12.11 Packet Request Reference

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

The purpose of the Packet Request Reference information element is to provide the information field sent in the Packet Channel Request (i.e. the PACKET CHANNEL REQUEST or EGPRS PACKET CHANNEL REQUEST message) and the frame number, FN modulo 42432, in which the Packet Channel Request was received.

Table 12.11.1: Packet Request Reference information elements

< Packet Request Reference IE > ::=
< RANDOM_ACCESS_INFORMATION value : bit (11) >
< FRAME_NUMBER : bit (16) > ;

Table 12.11.2: Packet Request Reference information element details

RANDOM_ACCESS_INFORMATION value (11 bit field)
This is an unformatted 11 bit field. If the mobile station used the 11-bit message format in the Packet Channel Request, all 11 bits of this field are valid. Otherwise, only bits 8 through 1 are valid and bits 11 through 9 shall be set to ‘0’

Bit

11

10

9

8

7

6

5

4

3

2

1

11-bit message format used

X

X

X

X

X

X

X

X

X

X

X

8-bit message format used

0

0

0

X

X

X

X

X

X

X

X

FRAME_NUMBER (16 bit field)
This field is encoded the same as the Starting Time information element defined in 3GPP TS 44.018.