CAJ | 학술논문

　　在无线网络高误码率的环境下，经典TFRC机制会将无线误码丢包误认为拥塞丢包，导致吞吐量过度降低。针对无线网络实时流媒体业务的传输控制问题，提出了一种改进型动态自适应 TFRC 机制(Adaptive-TFRC)。它在接收端利用丢包区分参数来真实反映网络的状态(即拥塞或者误码)，然后反馈至发送端，同时对经典 TFRC机制的吞吐量模型公式进行改进，最终能够根据实时网络条件动态自适应地调节传输速率。仿真结果表明， Adaptive-TFRC机制能够有效地提高网络吞吐量，降低实时业务流的延时抖动，同时能够进一步改善TCP业务的友好性传输，从而保证无线网络实时流媒体的服务质量。
　　재무선망락고오마솔적배경하，경전TFRC궤제회장무선오마주포오인위옹새주포，도치탄토량과도강저。침대무선망락실시류매체업무적전수공제문제，제출료일충개진형동태자괄응 TFRC 궤제(Adaptive-TFRC)。타재접수단이용주포구분삼수래진실반영망락적상태(즉옹새혹자오마)，연후반궤지발송단，동시대경전 TFRC궤제적탄토량모형공식진행개진，최종능구근거실시망락조건동태자괄응지조절전수속솔。방진결과표명， Adaptive-TFRC궤제능구유효지제고망락탄토량，강저실시업무류적연시두동，동시능구진일보개선TCP업무적우호성전수，종이보증무선망락실시류매체적복무질량。
In the high error rate wireless network environment, packet loss caused by wireless error will be misunderstood as congestion packet loss by the classic mechanism of TFRC, leading to lower throughput. To solve the transmission control problem of the wireless network for real-time streaming media service, the paper proposed a mechanism called Adaptive-TFRC which was an improved mechanism of TFRC, which can reflect the true state of the network by using loss differentiation parameter of the receiving end, then the value of parameter would be sent back to the sending end, also we have improved the throughput model formula of the classic mechanism of TFRC in this paper, finally it can realize the dynamic adaptation of transmission rate. The simulation result shows that Adaptive-TFRC can greatly improve the throughput, reduce the delay jitter of real-time traffic, and it posses TCP friendly characteristic very well, thus guaranteeing service quality of the wireless network real-time streaming media.