无线多媒体传感器网络的最大不相交多径路由
Maximally Radio-Disjoint Multipath Routing for Wireless Multimedia Sensor Networks
摘要：
在无线传感器网络中，带宽是多媒体应用的宝贵资源之一。为了获得更多的带宽，多路径路由是一个合适的解决方案，只要路径间的干扰最小化。在本文中，我们解决的问题，在无线多媒体传感器网络的背景下，干扰路径，并考虑会话内以及会话间的干扰。我们的主要目标是通过非干扰路径为多媒体应用提供必要的带宽，同时增加网络的生命周期。为此，我们采用了一种增量方法，对于给定的会话，一次只构建一条路径。在需要时，通常在拥塞或带宽不足的情况下，会建立额外的路径。通过切换处于{ \em被动状态}的传感器节点的子集来实现干扰感知和节能，在所述传感器节点的子集中，它们不参与路由过程。尽管我们采用的增量方法引入的路由开销，我们的模拟表明，这可以补偿的整体实现的吞吐量和每个正确接收的数据包，特别是对于相对较长的会话，如多媒体的消耗的能量。这主要是由于这样的事实，即少量的非干扰路径允许比大量的干扰路径更好的性能。
英文摘要：
In wireless sensor networks, bandwidth is one of precious resources to multimedia applications. To get more bandwidth, multipath routing is one appropriate solution provided that inter-path interferences are minimized. In this paper, we address the problem of interfering paths in the context of wireless multimedia sensor networks and consider both intra-session as well as inter-session interferences. Our main objective is to provide necessary bandwidth to multimedia applications through non-interfering paths while increasing the network lifetime. To do so, we adopt an incremental approach where for a given session, only one path is built at once. Additional paths are built when required, typically in case of congestion or bandwidth shortage. Interference awareness and energy saving are achieved by switching a subset of sensor nodes in a {\em passive state} in which they do not take part in the routing process. Despite the routing overhead introduced by the incremental approach we adopt, our simulations show that this can be compensated by the overall achieved throughput and the amount of consumed energy per correctly received packet especially for relatively long sessions such as multimedia ones. This is mainly due to the fact that a small number of non-interfering paths allows for better performances than a large number of interfering ones.
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