9.1.46 Uplink busy

3GPP44.018GSM/EDGE Radio Resource Control (RRC) protocolMobile radio interface Layer 3 specificationRelease 16TS

The understanding of this message is only required for mobile stations supporting VGCS talking and sending of application-specific data.

This message is broadcasted on the voice group call channel on the main DCCH, SAPI=0, by the network in unacknowledged mode to inform the mobile station of the uplink status of the voice group call channel. See table 9.1.46.1.

Message type: UPLINK BUSY

Significance: dual

Direction: network to mobile station

Table 9.1.46.1: UPLINK BUSY message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management Protocol Discriminator

Protocol Discriminator
10.2

M

V

1/2

Skip Indicator

Skip Indicator
10.3.1

M

V

1/2

Uplink busy Message Type

Message Type
10.4

M

V

1

31

Talker Priority and emergency indication

Talker Priority Status

10.5.2.64

O

TLV

3

32

Token

Token 10.5.2.66

O

TV

5

33

Talker Identity

Talker Identity

10.5.2.65

O

TLV

3 – 20

8-

Uplink Access Indication

Uplink Access Indication

10.5.2.74

O

TV

1

9.1.46.1 Talker Priority and Emergency Indication

This IE contains the talker priority, the status of the emergency mode and the availability of the voice group call channel for sending uplink access requests related to talker priority. If the IE is not present then the MS assumes that the emergency mode is not set and that the network does not support talker priority.

NOTE: The channel to be used for uplink access requests related to application-specific data is specified in the Uplink Access Indication (see sub-clause 9.1.46.4).

9.1.46.2 Token

This IE contains the 32 bit long token for the validation of the Priority Uplink Request.

9.1.46.3 Talker Identity

This IE contains the identity of the current talker.

9.1.46.4 Uplink Access Indication

This IE indicates whether a mobile sending application-specific data should perform uplink access on the group call channel or via the RACH.