| This project concerns robust communication in wireless sensor networks in a logistical setting, prone to node failures and unreliable transmission links, operating under severe energy constraints. The focus is on coding (combined source, channel and network coding) and routing techniques to achieve the following objectives: - how to realize low energy consumption while maintaining connectivity and adequate information exchange; this includes distributed transmit power control and local data processing to reduce the amount of transferred bits. - how to build networks with unreliable nodes and unreliable links; this includes unreliable links due to difficult transmission environment, but also includes node failures, node removal, or the decision not to use nodes due to their available energy; local awareness of wireless capacity. - how to use the benefits of node mobility and time and space varying node density, for example delay transmission until nodes are in close range vs long distance transmission at higher power; this includes the trade-off between immediate transmission and transmission delay so as to achieve high network life time (in terms of available energy). - how to achieve reliable multi-hop transmission; this includes e.g. the trade-off between data redundancy along single path transmission vs multi path redundancy; this can be seen as optimal coding in multi path networks but also as collaboration of locally clustered nodes to transmit data in electromagnetic harsh environments. |
