M Radhika 01 02 Abstract Due to their mobile nature with changing topologies and limited battery energy budgets mobile ad hocnetworks MANETs face serious energy issues To enhance energyefficient routing in MANETs this study proposesa coalitionformation game model The nodes create coalitions according to utility functions that consider linkstability cost of transmission and energy left Nodes can collaborate to extend network lifespan optimise routedecisions and evenly balance power consumption etc The suggested model involves the application of gametheoreticnotions to ensure stable coalition structure formation and promote node cooperation Simulation studiesalso show the coalitionbased strategy outruns the conventional routing protocols by reducing energy consumptionpacket delivery ratio and extending network lifetime The method gives a dynamic and versatile approach toconnection maintenance in MANET conditions Copyright (c) International Journal of Engineering and Basic Sciences. All rights reserved 2026