On physical carrier sensing in wireless ad hoc networks
On physical carrier sensing in wireless ad hoc networks
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DOI：
10.1109/infcom.2005.1498537
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
Xue Yang;N. Vaidya
中科院分区：
文献类型：
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作者：
Xue Yang;N. Vaidya
无线自组织网络的总吞吐量取决于信道容量、信道利用率（即，用于生成良好Put的信道容量的部分）以及网络中允许的并发传输。虽然信道利用率由MAC开销决定，但物理载波侦听已被用作避免干扰和利用空间重用的有效方式。先前的研究已经尝试确定可以最大化总吞吐量的最佳载波侦听范围。然而，MAC开销的影响被忽略了。在本文中，我们使用的分析模型和仿真结果表明，MAC开销有显着影响的最佳载波侦听范围的选择。如果在确定最佳载波侦听范围时没有适当考虑MAC开销，则聚合吞吐量可能遭受显著损失。
The aggregate throughput of a wireless ad hoc network depends on the channel capacity, channel utilization (i.e., the fraction of channel capacity used for generating good put), and the concurrent transmissions allowed in the network. While channel utilization is determined by MAC overhead, physical carrier sense has been used as an effective way to avoid interference and exploit spatial reuse. Prior research has attempted to identify the optimal carrier sense range that can maximize the aggregate throughput. However, the impact of MAC overhead has been ignored. In this paper, we use both an analytical model and simulation results to show that MAC overhead has significant impact on the choice of optimal carrier sense range. If MAC overhead is not taken into account properly in determining the optimal carrier sense range, the aggregate throughput can suffer a significant loss.