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This paper is concerned with the problems of the wireless gateway communication protocol for distributed monitoring systems. For large-scale monitoring systems, the wireless gateway is needed to improve the communicating ability. We present the framework of the wireless gateway protocol stacks, which can be used in embedded systems. By introducing the mechanism of segment caching and local retransmission to the TCP protocol, the process working mode of the protocol stacks can be improved. The result of this paper demonstrates that the scheme can effectively raise the real-time character and compatibility of the wireless gateway communication protocol.