| Ad hoc网络中基于拥塞的机会调度算法 |
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| 引用本文： | 夏海轮,丁炜. Ad hoc网络中基于拥塞的机会调度算法[J]. 电子科技大学学报(社会科学版), 2008, 0(5) |
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| 作者姓名： | 夏海轮 丁炜 |
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| 作者单位： | 北京邮电大学宽带通信网络实验室; |
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| 基金项目： | 国家自然科学基金(60372101) |
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| 摘 要： | 无线多跳Ad hoc网络中的节点在业务发送过程中需要竞争共享信道,容易发生局部拥塞导致网络性能下降,而且节点内部采用的先入先出(FIFO)队列容易使队头出现阻塞现象,影响队列中后续分组的发送。为此提出了一种基于拥塞的机会调度算法,发送节点发送RTS帧时目标指向多个下一跳接收节点,这些节点在正确解码RTS帧后根据自身拥塞程度按一定概率依照调度优先级顺序发送CTS帧。仿真结果表明,该算法提高了网络端到端的饱和吞吐量和信道利用率,也提高了业务流之间的公平性。
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| 关 键 词： | 无线自组网 拥塞控制 队头阻塞 机会调度 |
Opportunistic Scheduling Algorithm Based on Congestion in Wireless Ad hoc Networks |
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| Xia Hai-lun , Ding Wei. Opportunistic Scheduling Algorithm Based on Congestion in Wireless Ad hoc Networks[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2008, 0(5) |
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| Authors: | Xia Hai-lun Ding Wei |
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| Affiliation: | Xia Hai-lun , Ding Wei (Broadb, Communication Networks Laboratory,Beijing University of Posts , Telecommunications Haidian Beijing 100876) |
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| Abstract: | In wireless multi-hop Ad hoc networks,nodes need to contend for the shared wireless channel,this could result in partial congestion in the network and degrade the network performance. And first in first out (FIFO) queue within a node could easily cause the head-of-line blocking problem. A novel congestion-based opportunistic scheduling (CBOS) algorithm is proposed. In CBOS,the sender sends multicast request to send (RTS) frame targeted to several receivers,and the receivers would reply priority-based clear ... |
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| Keywords: | Ad hoc congestion control head-of-line blocking opportunistic scheduling |
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