User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.02

3.3.2.2 RAS Service Controller (RSC)

The RSC is in charge of the signaling-concentrated service in the SPI-2213. 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 802.16 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.

Main functions of RSC 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 SPI-2213. 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 802.16 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 RAS card (MRA-F). The RTC communicates with the modem block via the

PCI interface.

The RTC is activated on MRA 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