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引用次数: 3
摘要
为了保证当前或未来无线网络上多媒体应用服务的QoS (Quality of Service),我们提出了一个物理层、数据链路层和网络层共同优化的跨层设计框架。在我们提出的方案中,我们将各种应用服务分为两个QoS类,即流和下载类型的数据传输。本文研究了一种数据链路层的帧分片方法,以提高网络层的时延和吞吐量性能。该方案基于QoS类和信道状态信息(CSI)对数据包长度进行合理控制。计算机仿真结果表明,该方案的延迟和吞吐量性能分别提高了8.52 ~ 10.5 dB和12.4 ~ 12.7%。
Cross-layer designed adaptive packet length control for wireless networks
In order to guarantee the QoS (Quality of Service) for current or future multimedia application services over wireless networks, we have proposed a cross-layer design framework which is jointly optimized among physical, data link, and network layers. In our proposed scheme, we classify the various application services into two QoS classes, i.e., streaming and downloading types of data transmissions. This paper focuses on a frame fragmentation method in data link layer to improve both latency and throughput performances in network layer. The proposed scheme properly controls the packet length based on the QoS classes as well as CSI (Channel State Information). The computer simulations reveal that our proposed scheme improves latency and throughput performances by 8.52–10.5 dB and 12.4–12.7%, respectively.