Samsung Mobile WiMAX Outdoor RAS SPI-2331, Описание системы

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Mobile WiMAX Outdoor RAS SPI-2331 System Description/Ed.02
© SAMSUNG Electronics Co., Ltd. 2-5
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Collaborative SM
Collaborative SM is the technology that doubles the frequency efficiency in view
of the outdoor SPI-2331 as two MSs with each individual antenna send data
simultaneously by using the same channel.
2.2.2 Call Processing Function
Cell Initialization Function
The outdoor SPI-2331 announces the MAC Management message such as DCD/UCD/
MOB_NBR-ADV to the cell area in service periodically to enable the MS receiving the
message to carry out the appropriate call processing function.
Call Control and Wireless Resource Allocation Function
The outdoor SPI-2331 enables an MS to enter to or exit from the network. When an MS
enters to or exit from the network, the outdoor SPI-2331 transmits/receives the signaling
message required for call processing via R1 interface with the MS or R6 interface with
ACR.
The outdoor SPI-2331 allocates various management/transport Connection Identifier(CID)
required for the network entry and service to a MS. When the MS exit from the network,
the outdoor SPI-2331 collects and release the allocated CID.
Handover
The outdoor SPI-2331 carries out the signaling and bearer processing for inter-sector
HO(Handover), inter-ACR HO and inter-carrier HO. At this time, ACR relays the handover
message between serving RAS and target RAS through the R6 interface.
To minimize the traffic disconnection in inter-RAS HO, the outdoor SPI-2331 performs the
data switching function. In handover, the outdoor SPI-2331 enables the serving RAS to
switch the user data in queuing to the target RAS and, therefore, the MS to recover the
traffic without loss.
Handover Procedure
For the detailed handover procedure, refer to Chapter 4 ‘Message Flow’.