3 Definitions and abbreviations

25.4193GPPRelease 17TSUTRAN Iu-BC interface: Service Area Broadcast Protocol (SABP)

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply:

Elementary Procedure: SABP consists of Elementary Procedures (EPs). An Elementary Procedure is a unit of interaction between the CN (CBC) and the RNC. These EPs are defined separately and are intended to be used to build up complete sequences in a flexible manner. If the independence between some EPs is restricted, it is described under the relevant EP description. Unless otherwise stated by the restrictions, the EPs may be invoked independently of each other as stand alone procedures, which can be active in parallel. Examples on using several SABP EPs together with each other and EPs from other interfaces can be found in reference TR 25.931 [4].

An EP consists of an initiating message and possibly a response message. Two kinds of EPs are used:

– Class 1: Elementary Procedures with response (success or failure).

– Class 2: Elementary Procedures without response.

For Class 1 EPs, the types of responses can be as follows:

Successful

– A signalling message explicitly indicates that the elementary procedure successfully completed with the receipt of the response.

Unsuccessful

– A signalling message explicitly indicates that the EP failed.

– On time supervision expiry (i.e. absence of expected response).

Class 2 EPs are considered always successful.

Message Reference: This is defined as consisting of the following parameters: Message Identifier, Serial Number, and SAI (Service Area Identifier).

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

CBC Cell Broadcast Centre

CBS Cell Broadcast Service

CN Core Network

EP Elementary Procedure

FP Frame Protocol

PDU Protocol Data Unit

RNC Radio Network Controller

SA Service Area

SABP Service Area Broadcast Protocol