The Broadcast/Multicast control (BMC) is a sublayer of layer 2 protocol of
Radio Interface Protocol Architecture as per
BMC-STD. It exists in the user plane only. It is located above the Radio Link Control (RLC), a layer 2 responsible for mapping logical channels. It is similar to
802.11
IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards, and specifies the set of media access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) computer com ...
's LLC layer which supports multimode operations and it works in three different modes:
a) Transparent
b) Unacknowledged data transfer
c) Acknowledged data transfer. Its main function is to deliver "Cell Broadcast" messages to its upper layer such as NAS.
Other functions specified in
GPP TS 25.301'' are:
* Storage of Cell Broadcast Messages.
* Traffic volume monitoring and radio resource request for CBS.
* Scheduling of BMC messages.
* Transmission of BMC messages to UE.
* Delivery of Cell Broadcast messages to upper layer (NAS).
Except for broadcast/multicast it operates in transparent mode as per
MC-STD''. On the uplink BMC it requires Unacknowledged mode of
data transfer
Data transmission and data reception or, more broadly, data communication or digital communications is the transfer and reception of data in the form of a digital bitstream or a digitized analog signal transmitted over a point-to-point or ...
from RLC.
References
*
MC-STD'' 3GPP TS 25.324 V8.0.0 (2007–12); 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Broadcast/Multicast Control BMC;
Broadcasting
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