Download now Free registration required
Cognitive Radio (CR) has been considered a key technology to enhance overall spectrum utilization by opportunistic transmissions in CR transmitter-receiver link(s). However, CRs must form a Cognitive Radio Network (CRN) so that the messages can be forwarded from source to destination, on top of a number of opportunistic links from co-existing multi-radio systems. Unfortunately, appropriate routing in CRN of coexisting multi-radio systems remains an open problem. The authors explore the fundamental behaviors of CR links to conclude 3 major challenges, and thus decompose general CRN into cognitive radio relay network, cognitive radio uplink relay network, cognitive radio downlink relay network, and tunneling (or core) network.
- Format: PDF
- Size: 292.7 KB