| Ad Hoc网络中基于信道状态的速率自适应机制 |
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| 引用本文： | 成德峰,马刈非. Ad Hoc网络中基于信道状态的速率自适应机制[J]. 应用科学学报, 2008, 26(1): 18-21 |
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| 作者姓名： | 成德峰 马刈非 |
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| 作者单位： | 解放军理工大学,通信工程学院,江苏,南京,210007 |
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| 基金项目： | 国家自然科学基金资助项目（No.60072016） |
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| 摘 要： | 针对多跳Ad Hoc网络,给出了一种兼顾分组碰撞和信道误码的饱和吞吐量解析式,基于此提出一种速率自适应机制.该方案支持多个速率,能够根据信道状态,以最大化饱和吞吐量为目标,选择最优的数据分组长度和数据分组发送速率.仿真结果表明,该方案在饱和吞吐量和抗信道衰减方面性能优于OAR和不同速率模式下的802.11 DCF.在信道衰减较剧烈时,性能与802.11 DCF 1 Mbps相比提高260%,与OAR相比提高10%.
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| 关 键 词： | 无线Ad Hoc网络 媒体接入控制协议 信道状态 速率自适应 网络 信道状态 发送速率 适应机制 Ad Hoc Network State Channel Based Adaptation Mechanism Mbps 模式 性能 信道衰减 仿真结果 数据分组 分组长度 最优 选择 目标 大化 |
| 文章编号： | 0255-8297（2008）01-0018-04 |
| 收稿时间： | 2007-08-17 |
| 修稿时间： | 2007-11-16 |
A Rate Adaptation Mechanism Based on Channel State in Ad Hoc Network |
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| CHENG De-feng,MA Yi-fei. A Rate Adaptation Mechanism Based on Channel State in Ad Hoc Network[J]. Journal of Applied Sciences, 2008, 26(1): 18-21 |
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| Authors: | CHENG De-feng MA Yi-fei |
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| Abstract: | An analytic formula of saturation throughput is presented for multi-hop Ad Hoe networks, which takes packet collision and channel conditions into account. Based on the formula, a rate adaptation mechanism is proposed. The scheme can adjust the rate of sending packets exactly, and choose the optimal size of packets to best match channel conditions for maximizing saturation throughput. Simulation results show that the scheme outperforms OAR and 802. 11 DCF with 10% and 260% improvement on the saturation throughput and channel-resiliency capability. |
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| Keywords: | wireless Ad Hoc network MAC protocol channel state rate adaptation |
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