User's Manual

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

QoS Support Function

The packet traffic exchanged between ACR and SPI-2213 is delivered to the modem in the

SPI-2213. At this time, the SPI-2213 allocates the queue in the modem to each service flow

that QoS type is specified to observe the QoS constraint given for each QoS class or service

flow and performs the strict-priority scheduling according to the priority.

The modem that receives the packet traffic performs the scheduling by using the uplink/

downlink algorithm, such as Proportional Fair (PF) or Round Robin (RR) and transmits the

scheduled allocation information to an MS through DL/UL MAP. The MS receiving the

DL/UL MAP checks the air resources allocated to the MS and modulates/demodulates the

downlink packet or transmits the uplink packet from the allocated uplink area.

Since the SPI-2213 provides the QoS monitoring function, it can compile statistics on

packets unsatisfying the latency requested from the QoS parameter according to TDD

frames and report the statistics to an operator via the OAM interface.