| 摘要 |
The application describes medium access coordination and channel selection for establishment of wireless communications in the context of dynamic spectrum access or cognitive radio networks. Facilitating access coordination to a wireless communications medium defining a plurality of channels is achieved by each node in a network storing information about the channels, including whether a channel is available for use by that node, and when the channel is available for use, a value corresponding to a traffic load on the channel. Nodes monitor for control signals relating to data transmissions and, as some of these control signals include traffic flow information, update their stored information accordingly. Such an approach allows nodes to select the least congested channels during channel access negotiation. Moreover, and in addition or in the alternative, can determine available channel capacity based on transmission activity measurements. The invention aims to address the prior art shortfall of not considering dynamic spectrum access or cognitive radio networks implementing a dynamic channel access protocol in which channel selection is based on traffic demand in order to achieve load balancing and better Quality-of-Service. |
