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机会网络中基于转发的路由算法会导致大量的数据流向重要节点,引起节点负载不均衡,最终使那些重要节点发生拥塞而导致数据被丢弃。针对这一问题,提出了一种基于节点身份转换的拥塞控制策略,节点根据自身的拥塞程度选择仅接受、仅转发或接受并转发数据。并且根据不同的拥塞程度选择了不同的消息处理方式。仿真实验结果表明,该拥塞控制策略能够有效降低节点的拥塞,减少网络中消息副本的数量,提高数据交付的效率。
The routing algorithm based on forwarding in the opportunistic network will lead to a large amount of data flow to the important nodes, causing the nodes to be unbalanced. Finally, those important nodes will be congested and the data will be discarded. Aiming at this problem, a congestion control strategy based on node identity transformation is proposed. Node chooses to accept only and forwards or receives and forwards data according to its own congestion. And according to the different degree of congestion choose a different message processing. The simulation results show that the congestion control strategy can effectively reduce the congestion of nodes, reduce the number of message copies in the network and improve the efficiency of data delivery.