在多TCP连接的6Lo WPAN(IPv6 over Low-Power Wireless Personal Area Networks)网络中,针对丢包严重时存在频繁的端到端重传问题,提出分布式TCP缓存队列策略。该策略能够使中间节点合理地缓存不同TCP连接在链路层传输中丢失的分段,从...在多TCP连接的6Lo WPAN(IPv6 over Low-Power Wireless Personal Area Networks)网络中,针对丢包严重时存在频繁的端到端重传问题,提出分布式TCP缓存队列策略。该策略能够使中间节点合理地缓存不同TCP连接在链路层传输中丢失的分段,从而保证每个TCP连接的性能,减少网络能耗。另外,采用ARQ机制进行链路层数据帧传输时,由于中间节点判断丢包的准确率较低,导致缓存队列中存在一些实际未丢失的分段。对这些分段的重传会消耗额外的能量,降低了缓存队列的利用率。因此缓存管理采用询问邻居节点的方式检查分段是否丢失,及时地删除无效的缓存分段。实验结果表明,采用分布式TCP缓存队列策略可以使得多个TCP连接的网络性能以及缓存队列利用率得到了很大提高。展开更多
TCP/IP is a next generation key technology in the wireless communication network where the different characteristics of wireless and wired links result in performance degradation. We can use the proxy and automatic re...TCP/IP is a next generation key technology in the wireless communication network where the different characteristics of wireless and wired links result in performance degradation. We can use the proxy and automatic repeat request (ARQ) schemes to deal with this problem. In this work, we investigate the TCP performance over proxy and ARQ in the wireless network. Our analysis results showed that using the proxy can result in lower transfer latency and higher throughput and that ARQ can decrease the loss rate of wireless link and improve the performance with little additional latency. The analytical results were validated against simulations using the NS-2 with some more realistic parameters.展开更多
文摘在多TCP连接的6Lo WPAN(IPv6 over Low-Power Wireless Personal Area Networks)网络中,针对丢包严重时存在频繁的端到端重传问题,提出分布式TCP缓存队列策略。该策略能够使中间节点合理地缓存不同TCP连接在链路层传输中丢失的分段,从而保证每个TCP连接的性能,减少网络能耗。另外,采用ARQ机制进行链路层数据帧传输时,由于中间节点判断丢包的准确率较低,导致缓存队列中存在一些实际未丢失的分段。对这些分段的重传会消耗额外的能量,降低了缓存队列的利用率。因此缓存管理采用询问邻居节点的方式检查分段是否丢失,及时地删除无效的缓存分段。实验结果表明,采用分布式TCP缓存队列策略可以使得多个TCP连接的网络性能以及缓存队列利用率得到了很大提高。
文摘TCP/IP is a next generation key technology in the wireless communication network where the different characteristics of wireless and wired links result in performance degradation. We can use the proxy and automatic repeat request (ARQ) schemes to deal with this problem. In this work, we investigate the TCP performance over proxy and ARQ in the wireless network. Our analysis results showed that using the proxy can result in lower transfer latency and higher throughput and that ARQ can decrease the loss rate of wireless link and improve the performance with little additional latency. The analytical results were validated against simulations using the NS-2 with some more realistic parameters.
