Effect of route diversity by employing turbo coding in multihop ad hoc and mesh networks
Effect of route diversity by employing turbo coding in multihop ad hoc and mesh networks
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DOI：
10.1504/ijsnet.2008.017227
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
T. Wada;Hiraku Okada;A. Jamalipour;K. Ohuchi;M. Saito
中科院分区：
文献类型：
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作者：
T. Wada;Hiraku Okada;A. Jamalipour;K. Ohuchi;M. Saito
近年来，传感器网络引起了人们的极大关注。这些网络可以通过多个传感器节点的信号中继形成多路由多跳结构。当信号在多路传输时，路由分集效应成为可能。这种效果可以帮助防止由于每条路由的质量损失而导致的性能下降。前向纠错（Forward Error Correction， FEC）方案和turbo编码有望提高路由分集。turbo编码器产生一个消息流和两个奇偶校验流，而影响解码过程的是消息流而不是奇偶校验流。因此，通过将消息流分配给可靠的路由，可以防止性能下降。本文研究了turbo码对多跳网络中路由分集的影响。研究了分集效应对多路质量损失的影响。我们采用三角网格网络进行评价。结果表明，多路传输具有较高的分集效应。他们还建议，即使不能保证多条路由的链路质量，也可以通过适当的流路由分配来防止大的性能下降。
Sensor networks have attracted enormous attention in recent years. These networks can form a multiroute multihop structure by the signal relaying via multiple sensor nodes. When the signals are transmitted over multiple routes, route diversity effect becomes possible. This effect can help in preventing performance degradation caused by the quality loss of each route. Forward Error Correction (FEC) schemes and turbo coding can be expected to enhance the route diversity. A turbo encoder generates one message stream and two parity streams whilst the message stream is influential for decoding process rather than the parity streams. Thus by allocating the message stream to a reliable route, the performance degradation could be prevented. In this paper, we examine the effect of the route diversity in multihop networks using turbo codes. The diversity effect against the quality loss of the multiple routes is investigated. We adopt the triangle mesh networks for the evaluation. The results suggest that the multiroute transmissions have high diversity effect. They also suggest that large performance degradation can be prevented by appropriate route assignment of the streams even though the link quality of the multiple routes cannot be guaranteed.