Abstract-Cooperative jamming as a physical layer security enhancement has recently drawn considerable attention. While most existing works focus on communication systems with a small number of nodes, we investigate the use of cooperative jamming for providing secrecy in large-scale decentralized networks consisting of randomly distributed legitimate users and eavesdroppers. A modified slotted ALOHA protocol, named CJ-ALOHA, is considered where each legitimate transmitter either sends its message signal or acts as a helping jammer according to a message transmission probability p. We derive the secrecy transmission capacity to characterize the network throughput and show how the throughput is affected by the CJ-ALOHA protocol. Both analytical and numerical insights are provided on the design of the CJ-ALOHA protocol for optimal throughput performance.
In REF , a modified slotted-ALOHA protocol is proposed where each legitimate transmitter either transmits its data or acts as a cooperative jammer according to a message transmission probability.
Cooperative jamming for secrecy in decentralized wireless networks
2012 IEEE International Conference on Communications (ICC)
2012 IEEE International Conference on Communications (ICC)
Computer Science