9.1.50a System information type 10bis $(ASCI)$

3GPP44.018GSM/EDGE Radio Resource Control (RRC) protocolMobile radio interface Layer 3 specificationRelease 17TS

The understanding of messages of this message type is only required for mobile stations supporting VGCS listening and VBS listening. A mobile station not understanding the message shall treat it as unknown message.

Messages of this message type are optionally sent by the network in unacknowledged mode on the SACCH related to the voice group call channel. SYSTEM INFORMATION TYPE 10bis messages contain a description of the voice group call channel in one or more neighbour cells. SYSTEM INFORMATION TYPE 10bis messages shall only refer to neighbour cells where the voice group call is active. When sent on the SACCH of a VGCS downlink, SYSTEM INFORMATION TYPE 10bis messages address all mobile stations receiving that downlink within the cell. There may be different SYSTEM INFORMATION TYPE 10bis messages sent on the same SACCH.

They are not standard layer 3 messages. They shall be transferred using the short header format for SACCH messages sent in unacknowledged mode specified in 3GPP TS 24.007.

Each SYSTEM INFORMATION TYPE 10bis message specifies the location of the group call channel in one or more cells. Newer information about a cell received in SYSTEM INFORMATION TYPE 10bis messages or in VGCS Neighbour Cell Information messages shall replace older information.

Message type: SYSTEM INFORMATION TYPE 10bis

Significance: dual

Direction: network to mobile station

<SYSTEM INFORMATION TYPE 10bis> ::= < RR short PD : bit > — See 3GPP TS 24.007 < message type : bit(5) > — See 10.4 < short layer 2 header : bit(2) > — See 3GPP TS 44.006 < SI10bis Rest Octets : bit(160) >; — See 10.5.2.70