| 2.4GHz MIMO 网状网络中一种固定信道分配方法（英文） |
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| 引用本文： | 王大鹏,杨寿保,胡云,滕达.2.4GHz MIMO 网状网络中一种固定信道分配方法（英文）[J].中国科学院研究生院学报,2007,24(4):506-515. |
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| 作者姓名： | 王大鹏 杨寿保 胡云 滕达 |
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| 作者单位： | 中国科学技术大学计算机科学系,合肥,230026 |
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| 基金项目： | Cisco Fund of Education “Voice over Wireless Local Area Network” and The Innovation Fund of USTC“MAC Design For MIMO MeshNetwork” |
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| 摘 要： | 由于无线网路中链路质量的不稳定、信号的广播传输模式和节点之间存在的相互干扰，针对提高无线网状网络性能的信道分配和路由选择将更加复杂。采用多信道成为一种可选的提高网络容量的方法。本文提出了一种基于2.4GHz 802.11无线网状网络的一种固定信道分配方法，采用了多输入多输出技术使得网络中的数据流以流水线的方式进行传输。在这个场景下多条并行的流可以同时被激活，以此来提升UDP和TCP的传输性能。通过对802.11b网络中1、6和11三个相互不重叠的信道的分配，该信道分配算法在空间上实现邻居节点之间的干扰最小化，其中信道1和11被分配给网状网络的主干传输部分，信道6被分配给用户接入网络。文章最后通过NS2仿真实验，并对本文提出的算法进行了分析。实验结果证明网络的平均吞吐率有大幅度提升，且多跳传输的延迟也被降低。
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| 关 键 词： | MIMO 无线Mesh网络 流水线 信道分配 |
| 文章编号： | 1002-1175(2007)04-0506-10 |
| 修稿时间： | 2006年12月11 |
A Novel Fixed Channel Allocation Method for 2.4GHz Wireless MIMO Mesh Network |
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| WANG Da-Peng,YANG Shou-Bao,HU Yun,TENG Da.A Novel Fixed Channel Allocation Method for 2.4GHz Wireless MIMO Mesh Network[J].Journal of the Graduate School of the Chinese Academy of Sciences,2007,24(4):506-515. |
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| Authors: | WANG Da-Peng YANG Shou-Bao HU Yun TENG Da |
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| Institution: | Department of Computer Science, University of Science and Technology of China, Hefei, Anhui, 230026 |
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| Abstract: | Due to the unstable link states, broadcasting transmission pattern, and interference between neighbor nodes, routing in Wireless Mesh Network (WMN) is much more complicated and unpredictable than wired network. Multi-channel provides an alternative solution to improve the performance by using more wireless resource. Based on this idea, a novel pipelined fixed channel allocation method for a planned 2.4GHz wireless mesh network is proposed in this paper, and multi-input and multi-output (MIMO) technology is introduced in order to improve the performance of wireless mesh network. Taking the advantages of MIMO's interference cancellation algorithm and MIMO-MU model, more parallel streams will be allowed at one time, which greatly improves the throughput both for UDP and TCP transmission. We apply this method to 802.11b wireless network by assigning the three orthogonal channels to reduce interference between neighbors and increase channel spatial reuse, in which channel 1 and 11 are assigned to backbones of mesh network and channel 6 is assigned for the connections between wireless clients and routers. Compared with normal multi-channel-multi-interface mesh networks, simulation results from NS2 show that by our approach the average throughput is greatly improved and the packet delay is also reduced. |
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| Keywords: | MIMO wireless mesh network MIMO fixed channel allocation |
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