Zte ZXMBW E9200, User Manual, Page: 26 / 63

ZXMBW E9200 Indoor Pico Base Station User Manual
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R1 Interface Description
The following describes the R1 interface, including R1 message
format, protocol stack and physical layer.
Table 8 describes the MAC management message format of the
R1 interface.
T
A B L E
8 R 1 M
E S S A G E
F
O R M A T
Content Description
Message Type
The first field of every management message is
Message Type. To know the value of this field, see
the content of MAC management message in the
protocol.
Non-TLV field
This field is sequenced strictly according to the
definition of message format. The corresponding
values of various fields are sorted strictly
according to the sequence defined by the message
format.
TLV field
This field is a triple field, i.e. type-length-value.
The message sorts the triple of such field
according to the actual situation.
The R1 interface contains MAC layer and physical layer.
The MAC layer includes three sub-layers, that is, service-specific
Convergence Sub-layer (CS), MAC Common Part Sub-layer (MAC
CPS) and security sub-layer in the top-down sequence.

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 provides various service-specific convergence sub-layer
specifications for different external protocol interfaces.

The MAC CPS sub-layer does not resolve the payload at the
CS sub-layer. The MAC CPS subl-ayer delivers 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 schedule above the physical layer.

The MAC layer contains an independent security sub-layer
that serves for authentication, safe key exchange and
encryption.
The physical layer is defined by multiple specifications, each of
which corresponds to a specific frequency range and application.
Figure 8 illustrates the R1 interface protocol stack
.
R1 Message
Format
Protocol Stack