11.2.60 EC Packet Downlink Ack/Nack 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

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

This message is sent on the EC-PACCH from the mobile station, whose uplink coverage class is set to CC5, to the network to indicate the status of downlink RLC data blocks received and to report the channel quality of the downlink. The mobile station may optionally initiate an uplink TBF by including the EC Channel Request Description in the message.

Message type: EC Packet Downlink Ack/Nack Higher CC

Direction: mobile station to network

Table 11.2.60.1: EC Packet Downlink Ack/Nack HIGHER CC information elements

< EC Packet Downlink Ack/Nack message content > ::=

< DOWNLINK_TFI : bit (5) >

< MS OUT OF MEMORY : bit(1)>

{ 0 < EC Ack/Nack Description : < EC Ack/Nack Description IE >> — Final Ack Indicator = 0

| 1 — Final Ack Indicator = 1 }

{ 0

| 1 { < EC Channel Quality Report Higher CC: < EC Channel Quality Report Type 2 IE > >

< DL_CC: bit (2) > } }

{ 0 | 1 < EC Channel Request Description : < EC Channel Request Description struct > > }

<padding bits >;

< EC Channel Request Description struct > ::=

< PRIORITY : bit (1) >

< NUMBER_OF_UL_DATA_BLOCKS : bit (4) >;

Table 11.2.60.2: EC Packet Downlink Ack/Nack HIGHER CC information element details

DOWNLINK_TFI (5 bit field)
This field contains the TFI of the mobile station’s downlink TBF. This field is defined in sub-clause 12.15.

EC Ack/Nack Description IE
This information element is defined in sub-clause 12.72.

EC Channel Quality Report Higher CC IE
This information element is defined in sub-clause 12.76.

MS OUT OF MEMORY (1 bit field)
This information element is defined in sub-clause 11.2.51

PRIORITY
This information element is defined in sub-clause 11.2.51

NUMBER_OF_UL_DATA_BLOCKS
This information element is defined in sub-clause 11.2.51

DL_CC (2 bit field)
This field contains the latest downlink Coverage Class estimation and the latest estimated C value range in case the C value is above BT_Threshold_DL, see 3GPP TS 45.008.

bit

2 1

0 0 DL CC4

0 1 DL CC3

1 0 DL CC2

1 1 DL CC1