Patent ID: 8135424
Filing Date: 2012-03-13
Classification: H04B,H04W

Abstract:
1. A method of cooperative sensing (CS) in a cognitive radio network having a base station and a plurality of cognitive radios (CRs) seeking to operate using a channel ordinarily dedicated to a primary system, comprising: selecting a group of subscribers within the plurality of CRs; sensing by the group of subscribers using a sensing configuration provided by the base station; receiving the sensing results at the base station from the group of subscribers; estimating an achievable spatial diversity gain for the group of subscribers based on sensing measurements; validating the group of subscribers by determining whether the achievable spatial diversity gain for the group of subscribers is sufficient to meet a predetermined spatial diversity gain requirement; and spectrum sensing by the validated group to identify a suitable channel for communication amongst the subscribers in the spectrum ordinarily dedicated to the primary system when the achievable spatial diversity gain meets the predetermined spatial diversity gain requirement; and selecting a new group of users from amongst the CRs when the achievable spatial diversity gain is insufficient to meet the predetermined diversity requirement.