Samsung Mobile WiMAX Outdoor RAS SPI-2331, System Description

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CHAPTER 3. Outdoor SPI-2331 Architecture
3-14 © SAMSUNG Electronics Co., Ltd.
3.3.2.2 RAS Service Controller (RSC)
The RSC is in charge of the signaling-concentrated service in the outdoor SPI-2331.
As for the system outside, the RSC performs the message exchange with ACR via the
Mobile WiMAX standard R6 interface. As for the system inside, RSC interworks with the
RTC that is in charge of traffic data and transmits the information on the internal control
message to the modem block.
The RSC performs the MAC message exchange described in IEEE 802.16d/e with an MS
and carries out the call setup procedure by interworking with the RRC via the system
internal message. The RSC is activated on MRA.
RSC’s main functions are as follows:
y
CID Creation and Release
y
MAC Management Message Processing
y
R6 Interface Message Processing
y
Handover processing
y
Sleep Mode Support for Power Reduction
y
Collection of Various Statistics
y
Paging Relay Function for MS
3.3.2.3 RAS Traffic Controller (RTC)
The RTC is the block to process the traffic of the outdoor SPI-2331. The RTC is the block
pertaining to the bearer plane and is located as the kernel module format of the corresponding
CPU. The RTC performs the R6 interface under IEEE 802.16e standard and enables to the
modem block to perform the R1 interface normally.
The RTC fragments the user data received from ACR via the R6 interface in MAC PDU
format and transfers the data to the modem block or re-assembles the MAC PDU received
from an MS via the R1 interface and transmits to ACR.
In addition, the RTC interworks with the RTC block controlling the RAS signal and performs
the call setup/release procedure. This process is carried out via the memory interface in the
ULDB. The RTC communicates with the modem block via the PCI interface.
The RTC is activated on ULDB and its main functions are as follows:
y
ARQ function: Receives the ARQ feedback message from an MS and processes the
message.
y
Analyzes and processes the RSC control message and performs the queue
management.
y
Performs the traffic interface with the modem block.
y
Performs the scheduling function for each QoS class