Cross layer optimization in assured connectivity tactical mesh networks

Dynamic topology control schemes have been discussed earlier for continuously optimizing tactical mesh topologies to maximize the network connectivity. A dynamic optimization of the physical layer topology, however, is treated by layers-1 and 2 as a disruption and usually triggers re-computation of end-to-end paths. Higher layer routing algorithms may not always determine the same path as intended by the optimized physical layer causing conflicts and contention. In this paper we examine the response of higher layers to tactical physical layer topology changes and study the impact of cross layer optimization on the network performance. In particular, the paper describes the network and application performance improvement by an assured connectivity physical layer algorithm named DAPR with and without layer-2 (Ethernet) optimization.