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T
ABLE
Message Type
Non-TLV field
TLV field
Protocol Stack
The R1 interface contains MAC layer and physical layer. The MAC
layer contains three sub-layers, that is, service-specific Conver-
gence Sub-layer (CS), MAC Common Part Sub-layer (MAC CPS)
and security sub-layer in the top-down sequence.
CS sub-layer: The CS sub-layer converts/maps the external data
received by CS-SAP into MAC SDU and transmits the data to MAC
CPS through MAC SAP. The sub-layer classifies external Service
Data Units (SDUs) and associates them with proper SFIDs and
CIDs. It supports the payload head compression function and pro-
vides various service-specific convergence sub-layer specifications
for different external protocol interfaces.
MAC CPS sub-layer: The MAC CPS sub-layer does not resolve the
payload at the CS sub-layer. The MAC CPS sub-layer supports
the core functions of the MAC layer, including bandwidth request,
connection setup and maintenance. It receives data of various
CS sub-layers through the MAC SAP and classifies these data by
different MAC connections. Its QoS is applied to transmission and
scheduling above the physical layer.
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7 R1 M
F
ESSAGE
ORMAT
Content
The first field of every management message is
Message Type. To know the value of this field,
refer to the content of MAC management message
in the protocol.
This field is sequenced strictly according to the
definition of message format. The corresponding
values of various fields are sorted strictly accord-
ing to the sequence defined by the message for-
mat.
This field is a triple field, that is, type-length-
value. The message sorts the triple of such field
according to the actual situation.
Security sub-layer: The MAC layer contains an independent
security sub-layer that provides authentication, safe key ex-
change and encryption.
The physical layer has multiple specifications, each of which
corresponds to a specific frequency range and application.
Figure 10
illustrates the R1 interface protocol stack.
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Chapter 1 Product Overview
Description
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