On the optimum number of hops in linear wireless networks
On the optimum number of hops in linear wireless networks
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DOI：
10.1109/itw.2004.1405293
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发表时间：
2004-10
期刊：
影响因子：
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通讯作者：
M. Sikora;J. N. Laneman;M. Haenggi;D. Costello;T. Fuja
中科院分区：
文献类型：
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作者：
M. Sikora;J. N. Laneman;M. Haenggi;D. Costello;T. Fuja
我们考虑一个无线通信系统与一个单一的源节点，一个单一的目的地节点，和多个中继节点之间等距放置。我们将我们的分析限制在编码TDMA多跳传输的情况下，即，节点不协作并且不尝试同时接入信道。给定带宽的全局约束，我们确定的跳数，达到所需的端到端的速率与最小的总传输功率。此外，我们研究如何最佳的跳数的变化时，端到端的延迟约束，采用球包装界和计算机模拟。分析表明，最佳跳数取决于端到端速率和路径损耗指数。具体来说，我们证明了存在一个渐进的每链路的频谱效率，这是首选的TDMA多跳传输的频谱效率。
We consider a wireless communication system with a single source node, a single destination node, and multiple relay nodes placed equidistantly between them. We limit our analysis to the case of coded TDMA multihop transmission, i.e., the nodes do not cooperate and do not try to access the channel simultaneously. Given a global constraint on bandwidth, we determine the number of hops that achieves a desired end-to-end rate with the least total transmission power. Furthermore, we examine how the optimum number of hops changes when an end-to-end delay constraint is introduced using the sphere-packing bound and computer simulations. The analysis demonstrates that the optimum number of hops depends on the end-to-end rate and the path-loss exponent. Specifically, we show the existence of an asymptotic per-link spectral efficiency, which is the preferred spectral efficiency in TDMA multihop transmission.