Network Coding Techniques for Wireless and Sensor Networks

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Network coding is a technique where relay nodes mix packets using mathematical operations, which reduces the number of transmitted packets. Network coding was first proposed for wired networks to solve the bottleneck problem and to in-crease the throughput. However, the broadcast nature of wireless networks and the diversity of the links make network coding more attractive in wireless networks. Network coding can be classified as either inter or intra-session. Inter-session net-work coding allows the packets from different sessions (sources) to be mixed to solve the bottleneck problem.