Abstract
This paper presents a novel transport layer protocol for multi-level wireless sensor networks. The node of lower level uses a lightweight transmission protocol, which predigests the head of segment and a six-state finite state machine is applied. In order to make the highest nodes convenient for connecting with exterior networks, we modify TCP in the aspects of segment caching and local segment retransmissions, and use the TCP modified in wireless sensor networks directly. Simulation results show that our design can improve the communication capability of the transmission layer in multilevel wireless sensor networks greatly.
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