Cooperative spectrum sensing in cognitive radio networks
AssigneeDynamic Invention LLC
InventorsKe Lang, Yuan Wu, Danny Hin Kwok Tsang
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Abstract
Providing for cooperative sensing in wireless communications that improves user terminal throughput and minimizes interference is described herein. According to some aspects, a network entity, such as a base station, can assign a set of SUTs to measure a subset of wireless channels in a target frequency according to a cooperative sensing arrangement. In particular aspects, this assignment can be implemented so as to increase or maximize potential traffic throughput of those SUTs within the target frequency, in a given wireless time slot. In this manner, cooperative sensing can be structured so as to provide more efficient traffic communications within the target frequency.
Claims41
A method of wireless communication, comprising:
- estimating busy or idle states for a set of wireless channels from prior channel information pertaining to the set of wireless channels;
- and
- assigning at least a subset of secondary user terminals (SUTs) in connection with measuring selected ones of the wireless channels as part of multi-user cooperative sensing in cognitive radio (CR) wireless communication, wherein the assigning is based at least in part on a function of a data traffic throughput metric for the at least the subset of SUTs that employs the busy or idle states.
A system, comprising:
- a channel state component configured to estimate respective idle or busy states of wireless channels observable within a range of a cognitive radio base station for an existing wireless time slot;
- and
- a scheduling component configured to select, subject to a data traffic throughput constraint for secondary user terminals (SUTs), a subset of the SUTs to perform idle or busy state measurements on a subset of the wireless channels as part of a cooperative channel sensing arrangement for cognitive radio.
A system for wireless communication, comprising:
- means for modeling busy or idle state probabilities of a set of wireless channels from energy measurements of respective wireless channels;
- and
- means for selecting user terminals (UTs) to measure current busy or idle states of a subset of the wireless channels as part of multi-user cooperative channel sensing based at least in part on a data traffic throughput function and the busy or idle state probabilities, wherein the user terminals are secondary user terminals in regard to the set of wireless channels.
Computer readable instructions stored on a non-transitory computer-readable medium, the computer readable instructions are configured to cause a computer to:
- estimate busy or idle states for a set of wireless channels from prior channel information pertaining to the set of wireless channels;
- and
- assign at least a subset of secondary user terminals in connection with measuring selected ones of the wireless channels as part of multi-user cooperative sensing in cognitive radio (CR) wireless communication, wherein assignment of respective secondary user terminals to respect wireless channels is a function of a traffic throughput metric for the secondary user terminals that employs the busy or idle states.
Dependencies are inferred from the claim text.