Research of QoS Control for Standardization on Real-time Multimedia Service Using MAC/PHY Feedback

O PQ3ROST:UVMXYQoS(Quality of Service)9DXZ,[\+]^+O_ |k, ECNy>I}e~c>-v`. WiMAX RO=,f€ST:UVCXY]^+9YH`.AbstractIn this paper, we study QoS(Quality of Service) control protocols and the effect using MAC/PHY parameters of client device in mobile network. We proposes the way of controling the bit-rate by estimating the channel condition of the client with measured MAC/PHY parameters which is sent from the client. With the proposed method, more accurate available bit-rate can be estimated compared to conven-tional protocol, RTCP(Real-time Transport Control Protocol). The accurate bit-rate estimation can decrease wasted bit-rate and transport delay. In the result of the advantages, the transported video quality can be enhanced. In this paper, we show the effects of enhancement using client’s the field data measured in WiMAX.Keyword : Scalable Video Streaming, QoS, Cross Layer Design