Zte ZXSDR R8860, Техническое руководство

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ZXSDR R8860 Technical Manual
Figure 3-4 Structure of the BCMCS Um Interface Protocol Stack
l
Broadcast Control Protocol processes BCMCS stream registration. The AT sends the
stream registration request to the AN so that the AN can broadcasting the stream
continuously.
l
Broadcast Framing Protocol encapsulates, segments and delimits upper layer pack-
ets.
l
Broadcast Security Protocol provides packet encryption mechanism.
l
Broadcast MAC Protocol adds forward error correcting codes to form Error Control
Block (ECB) and relays MAC frames to the physical layer. The layer is responsible of
logical channel mapping, constructing and sending broadcast overhead messages.
l Broadcast Physical Protocol provides a logical channel structure.
3.3 Baseband—RF Interface
The baseband-RF interface of ZXSDR R8860 complies with the common public radio
interface (CPRI) specification. The CPRI specification was instituted by the CPRI Union,
which is an industry cooperation organization devoting itself to institution of internal radio
interface specifications of radio base stations.
The CPRI specification describes the transmission, control and synchronization
mechanisms of user data and control signaling, defining the essential factors such as
transmission, connection and control.
From a view of the specification system, the CPRI specification contains the contents
of physical layer and data link layer. It describes characteristics of electrical and optical
interfaces and multiplexing mechanisms among various data flows in the matter of the
physical layer, and media access control ( MAC ), flow control and information flow
protection in the matter of the data link layer.
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SJ-20100722143906-001|08/30/2010 ZTE Proprietary and Confidential