A mobile ad-hoc network (MANET) uses an omni-directional antenna, which transmits and receives power from all directions, resulting in higher noise and interference. The interference effects can be minimized with the help of adaptive directional antennas. The proposed model for implementing adaptive antenna techniques in MANET is a cross layer design. Utilizing adaptive antennas, two nodes are able to communicate when both the transmitter’s and receiver’s unidirectional radiation beams are directing toward each other’s nodes. A cross layer methodology for dynamic topology control enables the interaction between medium access control layer and the routing layer for reaching the necessary quality of service (QoS) of various data packets. After the initialization of a network, the algorithm initially develops a topology and the routing techniques use this network topology to find out the route paths for data transmission. Later, based on the network scenario for ongoing transmissions and to obtain the necessary QoS, the topology gets altered by the topology control layer in order to obtain the optimized network with better performance. Simulation results show specifically, throughput and signal-to-noise ratio were increased by 33 % and 42 %, respectively.

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