Stability analysis for cognitive radio with multi-access primary transmission

Abstract--This letter analyzes the impact, from a networklayer perspective, of having a single cognitive radio transmitterreceiver pair share the spectrum with multiple primary users wishing to communicate to a single receiver in a multi-access channel (MAC). In contrast to previous work which assumes a time division multi-access strategy, here, we assume the set of primary users simultaneously access the channel to deliver their packets to a common destination. We derive the symmetric stable throughput regions, consisting of maximal arrival rates for primary and secondary (or cognitive radio) users under two investigated protocols. The first protocol is a conventional MAC scheme where the primary and secondary nodes operate independenly. The second protocol corresponds to a multi-access relay channel (MARC) which exploits user cooperation between primary and secondary nodes. We prove that cooperation is beneficial in the considered MARC as it enables higher throughputs for both primar...

• Type: Journal
• Year: 2010
• Where: TWC
• Authors: Ioannis Krikidis, Natasha Devroye, John S. Thompson
• Keywords: Artificial Intelligence, Cognitive Radio, Primary Users, Secondary Nodes, TWC 2010