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本论文在分析无线传感器网络不同于普通有线网络的特征后,提出了一种适用于无线传感器网络的TCP拥塞控制机制DW-TCP,此机制将TCP拥塞窗口分为拥塞丢包窗口和误码丢包窗口,在链路误码率较高时通过降低发送速率提高数据发送的可靠性,节约无线节点的能源消耗和系统不必要的开销,该机制不但考虑到拥塞丢包对数据发送速率的影响,而且考虑到无线链路中的误码丢包对数据发送速率的影响。
After analyzing the characteristics of wireless sensor network which is different from ordinary cable networks, this paper proposes a TCP-congestion control mechanism DW-TCP for wireless sensor networks. This mechanism divides TCP congestion windows into congested packet loss windows and error codes The packet window increases the reliability of data transmission by reducing the transmission rate when the link bit error rate is high, and saves the energy consumption of the wireless node and the system unnecessary overhead. The mechanism not only considers the impact of the congestion loss on the data transmission rate , And also considers the impact of error packet loss on the data transmission rate in the wireless link.