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Relay technology can improve the coverage and capacity of wireless system, but it causes long transmission delay and network congestion. In addition, the movement of MS or RS, and radio resource contention can result in wireless path broken or connection broken. Traditional TCP can not differentiate the packet loss reasons in Mobile Multi-hop Relay network that may be due to congestion, link error, and handover or path reselection. This paper proposes a Hybrid Performance Enhance Proxy solution based-on Cross-Layer Design, which cooperatively combines retransmission and ARQ to enhance TCP performance without modifying TCP protocol.
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