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Content for  TS 48.049  Word version:  16.0.0

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1  ScopeWord‑p. 7

The present document specifies the Cell Broadcast Service Protocol (CBSP) between the Cell Broadcast Centre (CBC) and the Base Station Controller (BSC).

2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TS 23.041: "Technical realization of Cell Broadcast Service (CBS)".
[2]
TS 23.003: "Numbering, addressing and identification".
[3]
TS 44.012: "Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface".
[4]
TS 23.038: "Alphabets and language-specific information".
[5]
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols".
[6]
RFC 793  (September 1981): "Transmission Control Protocol".
[7]
RFC 2507  (February 1999): "IP header compression".
[8]
RFC 1990  (August 1996): "The PPP Multilink Protocol (MP)".
[9]
RFC 2686  (September 1996): "The Multi-Class Extension to Multi-Link PPP".
[10]
RFC 2509  (February 1999): "IP Header Compression over PPP".
[11]
TS 45.002: "Multiplexing and multiple access on the radio path".
[12]
TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
[13]
TS 44.060: "General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control / Medium Access Control (RLC/MAC) protocol".
[14]
TS 23.002: "Network architecture".
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3  Definitions and abbreviations

3.1  Definitions

For the purposes of the present document, the following terms and definitions apply:
CBS message:
An information message broadcasted on the basic or extended cell broadcast channel (CBCH) in unacknowledged mode to mobile stations located within the Cell Broadcast area. A CBS message may contain information such as road traffic or weather information, originating from a Cell Broadcast Entity (CBE) communicating with the CBC (see TS 23.041).
CBS message reference:
Uniquely identifies a CBS message by the four elements: Message Identifier, Serial Number, Cell Identifier and Channel Indicator.
Cell Broadcast area:
An area comprising of one or more cells in which the CBS message or the emergency message is broadcasted. A Cell Broadcast area is always contained within a BSC area (see TS 23.002).
CBS message operational state:
A cell in CBS message operational state is able to broadcast CBS messages.
Emergency message:
A warning message conveying a small amount of data to indicate the imminent occurrence of an emergency such as earthquake, tsunami etc. The emergency message is broadcasted to mobile stations in idle mode, packet idle mode and dedicated mode (see TS 44.018) and to mobile stations in packet transfer mode and dual transfer mode (see TS 44.060) located within the Cell Broadcast area.
Emergency message operational state:
A cell in emergency message operational state is able to broadcast emergency messages.
Emergency message reference:
Uniquely identifies an emergency message by the three elements: Message Identifier, Serial Number and Cell Identifier.
Elementary Procedure:
CBSP consists of Elementary Procedures (EPs). An Elementary Procedure is a unit of interactions between the CBC and the BSC. 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. Support of parallel procedures in the BSC is optional.
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 EP is successfully completed.
Unsuccessful
  • A signalling message explicitly indicates that the EP failed.
  • On time supervision expiry (i.e. absence of expected response).
Class 2 EPs are always considered as successful.
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3.2  AbbreviationsWord‑p. 8

For the purposes of the present document, the following abbreviations apply:
BSC
Base Station Controller
CBC
Cell Broadcast Centre
CBCH
Cell Broadcast Channel
CBE
Cell Broadcast Entity
CBS
Cell Broadcast Service
CBSP
Cell Broadcast Service Protocol
EP
Elementary Procedure
ETWS
Earthquake and Tsunami Warning System
MS
Mobile Station
SMSCB
Short Message Service Cell Broadcast

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