11.2.54 EC Packet Polling Request

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

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

This message is sent on the EC-PACCH by the network to the mobile station to solicit an EC PACKET CONTROL ACKNOWLEDGEMENT or EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC message from the mobile station.

Message type: EC PACKET POLLING REQUEST

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.54.1: EC Packet POLLING REQUEST information elements

< EC Packet Polling Request message content > ::=

< USED_DL_COVERAGE_CLASS : < Used DL Coverage Class IE >>

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

{ < TYPE_OF_ACK : bit (1) >

< padding bits >

! < Non-distribution part error : bit (*) = < no string > > }

! < Address information part error : bit (*) = < no string > >

! < Message escape : { 1 } bit (*) = <no string> > } — Extended for future changes

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

Table 11.2.54.2: EC Packet POLLING REQUEST information element details

USED_DL_COVERAGE_CLASS (2 bit field)
This information element is defined in sub-clause 12.71.

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

TYPE_OF_ACK
This field indicates the format of the EC PACKET CONTROL ACKNOWLEDGEMENT or EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC message requested from the mobile station by the EC PACKET POLLING REQUEST message.

0 EC PACKET CONTROL ACKNOWLEDGEMENT or EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC message format shall be sent as four access bursts
1 EC PACKET CONTROL ACKNOWLEDGEMENT or EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC message format shall be an RLC/MAC control block

Depending on the UL Coverage Class assigned to the mobile station, the transmission of the EC PACKET CONTROL ACKNOWLEDGEMENT or EC PACKET CONTROL ACKNOWLEDGEMENT HIGHER CC message shall be sent using a specific number of blind physical layer transmissions. This is valid both when the message format is four access bursts and when it is an RLC/MAC control block.