A Cross-Layer Routing Protocol Based on Location Information for Multi-hop Wireless Ad hoc Networks with Directional Antenna

In multi-hop wireless ad hoc networks, communications with directional antennas can effectively improve the transmission range of the node. Most of existing directional routing protocols adopt the four-way handshaking mechanism which transmits and receives with directional and omnidirectional antennas respectively. As a result, the transmission range of the node is tremendously limited due to the underutilization of the directional antenna gain of the receiver. To solve this problem, in this paper, a directional cross-layer routing protocol based on location information for multi-hop wireless ad hoc networks is proposed. In this protocol, we propose a novel handshaking mechanism to achieve directional to directional beam alignment. Further, the source node chooses the optimal directional to directional Routing by a cross-layer manner. Simulation results show that the protocol can achieve the better throughput and end-to-end delay performance compares with that obtained by the existing directional routing protocol.