Jamming in Slotted ALOHA Multihop Packet

Multihop packet radio networks (PRN's) provide high capacity area data communications. Due to the inherent redundancy of communication paths, these networks are reliable and almost insensitive to equipment failure. In this paper, we investigate the properties of a packet radio network in the presence of active interference. Both the jammer and the network nodes are subject to an average power constraint. The network uses slotted ALOHA multiple access schemes and some simple fixed routing strategies with constant transmitter power. By using a game-theoretic approach we consider the situation as a two- person constant-sum game. We define network performance as the values of the game in terms of the expected forward progress of a packet. Both the performance and the optimum strategies for access and jamming are investigated. I. INTRODUCTION