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Network coding has been studied as a solution to mitigate traffic concentration at a bottleneck node in wireless multihop networks. When network coding is applied to a unicast flow, the decoding nodes overhear packet transmissions, receive all packets which are headed for not only themselves but also the other nodes, and store them. The reception of undesired packets is, however, unreliable, and this...
In this paper, the bit error rate (BER) performance of turbo coded multi-route multi-hop networks is presented. Multi-hop networks have received much attention in recent years because of their large channel capacity. When the information bit streams are transmitted over multiple routes, a route diversity effect would also be possible. In order to improve the route diversity effect the receiver side...
One of the solutions to mitigate degradation due to traffic concentration on certain nodes is network coding in ad hoc networks. When network coding is applied to unicast traffic, it is necessary to satisfy two condition; (a) an encoding node has to know which packets the neighbor node stores, and (b) decoding nodes have to hold all native packets encoded in the received packet except for the desired...
In a sensor network, a lot of distributed sensor nodes observe a certain area or environment, and transmit the observed data to a sink. The observed data sequences may have space- and/or time-dependent correlation. This correlation is regarded as redundant information and can be used for error correction by the joint decoding. In this paper, we propose the joint decoding scheme using the time-dependent...
In this manuscript, a decode-and-forward cooperative diversity scheme for wireless packet transmission network with large and undetermined set of relay terminals is considered. Correctly received signals at some relay terminals are retransmitted to the receiver with the STBC-based cooperative relaying scheme. For large and undetermined set of relay terminals, performance of the conventional STBC-based...
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