Abstract: A Wireless ad-hoc network is an autonomous, self-organize distributed, peer to peer network of fix, nomadic or mobile user that communicates over bandwidth constrained wireless links. Energy Consumption and Network Connectivity are two of the most important issue that yet to be resolve in MANETís. Broadcasting, in context of ad-hoc networks is a costly operation and thus topology control has been proposed to achieve efficient broadcasting with low interference and energy consumption. By using topology control each node optimizes its transmission power, by maintaining network connectivity by localize manner. In this paper, we propose Local Tree-Based Reliable Topology (LTRT), which is mathematically proven to guarantee k-edge connectivity while preserving the feature of Local Minimum Spanning Tree (LMST).while applying topology control technology into Manet, it is important to address the issue of performance degradation due to node mobility. In the network each node contain the topology information to maintain the connectivity with neighbors for that it needs to be frequently and appropriately update its information according to its moving speed. In our mechanism, each node determines exact value of topology control update interval according to topology information of its neighbors. By simulation results using network simulator (NS2) we achieve better dynamic topology update mechanism.

Keywords: Ad-Hoc Networks, Energy efficiency and Reliability, K-edge connectivity, LTRT,Network connectivity, PANís, Topology control