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无线广播网络中由于没有RTS和CTS机制,无法解决隐藏终端问题.提出广播网络中隐藏终端编码算法(HB-CODE),一种利用网络编码来解决无线广播网络中隐藏终端的方法.该方法在节点处利用节点已经接收过的包会在节点产生一个副本,然后通过特殊的机制确认碰撞包中是否有已接收过的包,若有再采用网络编码的方法解码碰撞包,从而恢复原始数据包.分析和实验表明网络编码解决机制减少了延迟2%到10%,平均降低了25%的丢包率,提高了无线广播网络的可靠性和吞吐量.
Because there is no RTS and CTS mechanism in wireless broadcast network, it can not solve the hidden terminal problem.Based on the HB-CODE, a method of using network coding to solve the hidden terminal in wireless broadcast network is proposed The node uses a packet that the node has already received to generate a copy at the node, and then confirms whether there is a received packet in the collision packet through a special mechanism. If there is a network coding method and then decodes the collision packet to recover the original data packet The analysis and experiment show that the network coding solution mechanism reduces the delay by 2% to 10%, reduces the average packet loss rate by 25% and improves the reliability and throughput of wireless broadcast network.