OFDMA 시스템에서 비디오 전송을 위한 효율적인 채널 할당

The mobile and multimedia service on wireless network have been leaded from the improvement of telecommunication techniques. A typical multimedia service, a video transmission usually requires larger bandwidth than voice transmission. M any channel allocation algorithms for Orthogonal Frequency Division Multiple Access (OFDMA) to use resources more efficiently. Previous channel allocation algorithms have developed with an assumption that the data traffic is constant bit rate (CBR). However, existing algorithms are not suitable to video traffic because it usually generates a variable bit rate (VBR) traffic. In this paper, we proposed a new channel allocation algorithm called a queue-based channel allocation. it is more suitable to transmit the video traffics. Also, a problem are notifed in case of realtime generated video traffic and a corresponding heuristic solution was proposed.