11.2.61 EC Packet Control Acknowledgement Higher CC
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 EC-PACCH from the mobile station which uses uplink coverage class CC5 to the network. The message is formatted either as an RLC/MAC control block using the EC-PACCH block format defined in 3GPP TS 44.004 or as a number of identical access bursts, according to the assigned uplink CC (see 3GPP TS 45.002), using the EC-PACCH short acknowledgement block format defined in 3GPP TS 44.004. If the message is sent as response to an EC Packet Polling Request message this latter message shall specify the format of the EC Packet Control Acknowledgement message. The order of bit transmission is defined in 3GPP TS 44.004. The numbering, assembling and field mapping conventions defined for RLC/MAC control blocks in sub-clause 10.0b shall apply.
The RLC/MAC control block format is shown in table 11.2.61.1 and table 11.2.61.2.
The access burst format is 11-bits and is coded as shown in table 11.2.61.1. The mobile station shall transmit the access burst four times, one time in each TDMA frame of the uplink radio block. The transmission of the four access bursts shall then be repeated in each of the uplink EC-PACCH resources assigned with the RRBP field according to the assigned uplink Coverage Class for the mobile station.
Message type: EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC
Direction: mobile station to network
Table 11.2.61.1: EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC information elements
< EC Packet Control Acknowledgement message Higher CC content > ::= — RLC/MAC control block format < TLLI : bit (32) > < CTRL_ACK : bit (2) > < DL_CC: bit (2) > < padding bits >; |
< EC Packet Control Acknowledgement Higher CC 11 bit message > ::= — 11-bit access burst format < MESSAGE_TYPE : bit (7) == 1110 111 > < DL_CC : bit (2) > < Spare : bit (2) > ; |
Table 11.2.61.2: EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC information element details
TLLI (32 bit field) |
CTRL_ACK (2 bit field) |
DL_CC (2 bit field) |