Content for TS 25.324 Word version: 16.0.0
1 Scope Word‑p. 6
The present document provides the description of the Broadcast/Multicast Control Protocol (BMC). This protocol adapts broadcast and multicast services on the radio interface.
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 25.322: "RLC Protocol Specification".
[2]
TS 25.301: "Radio Interface Protocol Architecture".
[3]
TS 23.041: "Technical realization of Cell Broadcast Service (CBS)".
[4]
TS 23.038: "Alphabets and Language".
[5]
TS 25.419: "UTRAN Iu interface: Service Area Broadcast Protocol SABP".
[6]
TS 25.925: "Radio Interface for Broadcast/Multicast Services".
[7]
TIA/EIA-41-D: "Technical realization of Cell Broadcast Service (CBS)".
[8]
TIA/EIA-637-A: "TR45 - Short Message Service for Spread Spectrum Systems".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply.
CB message:
user data as transmitted from Cell Broadcast Centre to UE (BMC SDU)
CB repetition period:
period after which a CB message should be broadcast again if more than one repetition are requested
Number of Broadcast Requested:
number of broadcasts requested for a CB message. This number is infinite or finite
DRX Schedule Period:
schedule period as optionally requested by the CBC (unit: seconds)
Reserved CB Capacity:
percentage of the capacity reserved for CB messages with category HIGH on the allocated radio resources CTCH, FACH and S-CCPCH. This parameter can be set optionally by the CBC.
CTCH Block Set:
subset of the transport block set of FACH on which the CTCH used for CBS is mapped uniquely
CBS schedule period:
finite sequence of CTCH Block Sets of variable length in which scheduled CB messages are broadcast
3.2 Abbreviations Word‑p. 7
For the purposes of the present document, the following abbreviations apply:
AS
Access Stratum
BMC
Broadcast/Multicast Control
C-SAP
Control Service Access Point
CBC
Cell Broadcast Centre
CBS
Cell Broadcast Service
CTCH
Common Traffic Channel
CTCH-BS
CTCH Block Set
FACH
Forward Access Channel
IE
Information Element
kbps
kilo-bits per second
L1
Layer 1 (physical layer)
L2
Layer 2 (data link layer)
L3
Layer 3 (network layer)
MAC
Medium Access Control
NAS
Non Access Stratum
NSAPI
Network layer Service Access Point
PDCP
Packet Data Convergence Protocol
RLC
Radio Link Control
RRC
Radio Resource Control
UE
User Equipment
