Zte ZXSDR R8860, Техническое руководство

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Chapter 3 Protocol Interface Description
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Authentication. It provides a procedure for the terminal and the network to
authenticate over-the-air services.
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Encryption. It provides a procedure for the terminal and the network to encrypt
over-the-air services.
The security layer covers four protocols, among which Key Exchange Protocol,
Authentication Protocol and Encryption Protocol define the three functions mentioned
above respectively while Security Protocol provides public variables for Authentication
Protocol and Encryption Protocol.
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MAC layer
The MAC layer defines the rules for managing control channel, access channel,
forward traffic channel and reverse traffic channel. It contains four protocols, as
described below:
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Control Channel MAC Protocol constructs Control channel MAC layer packet
from one or more Security layer packets, controls packet scheduling and
transmission rule of channels and regulates how the terminal captures the
control channel and receives control channel packets.
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Access Channel MAC Protocol defines that the terminal sends timing messages
and power features over the access channel.
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Forward Traffic Channel (FTC) Protocol regulates how to control the rate of the
FTC through the DRC and how to support the fixed rate mode and variable rate
mode of the FTC.
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Reverse Traffic Channel (RTC) Protocol regulates how the terminal assists the
network to capture the RTC and how the terminal and the network choose RFC
rate.
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Physical layer
The physical layer defines structure, frequency, power output,
modulation/demodulation and coding/decoding of the forward/reverse channel.
BCMCS Um Interface
The Broadcast and Multicast Service ( BCMCS ) Um interface implements broadcast and
multicast services. Figure 3-4 shows the structure of the BCMCS Um interface protocol
stack.
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