Research on the PHY, MAC, NETWORK Cross-layer Protocol Design to Improve the Performance of Multi-hop Ad-hoc Networks

This paper proposes new cross layer protocol of PHY layer, MAC layer and NET layer. In ad-hoc network, when a route is established, the radio resource allocation problems at MAC layer và the physical interference at PHY layer may decrease the end to end performance proportionally. The contention at MAC layer and PHY layer may cause routing protocol to respond by finding new routes and routing table updates. The cross layer design allows layers to exchange state information in order to solve the problem and obtain higher performance. Numerical results show significant improvements in the proposed cross layer protocol of PHY layer, MAC layer and NET layer, besides the PHY layer based on SINR parameter, the MAC layer based on the Dynamic Sub-channel Assignment algorithm, the NET layer based on Dijsktra algorithm ensure the performance of multi-hop ad-hoc networks.