Link-based spectrum section sensing for cognitive radio networks

A device with embedded cognitive radio (CR) seeks to join a novel low-cost multi-radio wireless network, one which adopts the whole spectrum for transmission. However, the amount of spectrum bands that a CR device is able to sense within a given time is limited, and in addition, CR node transmissions may co-interfere. Thus, we propose a link-based pre-allocated spectrum section sensing for unicast flow such that the likelihood of available frequency bands matching is improved as well as sensing and negotiating overhead and interference are reduced. We compare our proposed scheme for multi-radio, multi-band, and multi-range routing with a general sensing spectrum method implemented in a cognitive radio network. The average end-to-end delay was evaluated to compare the quality of our proposed method.