Method for spectrum sensing in cognitive radio networks with open wireless architecture
First Claim
1. An Open Wireless Architecture (OWA) spectrum sensing method for secondary user of spectrum in cognitive radio networks, said method comprising selection of sensing node, configuration for location of each said sensing node, sensing frame for control of sensing process, and division of sensing region, wherein configuration of said sensing node is based on node selection and node location in different divided small sensing areas, and implementation of said sensing process is based on both sensing scheduling and spectrum signal sensing, andwherein priority for said selection of sensing node is divided into fourth levels, each denoted by two bits, f2 and f3 in said sensing frame, and for each said secondary user, active or idle condition is represented by letting f2 be 1 or 0 respectively, and delay-sensitive or non-delay-sensitive service is denoted by making f3 be 1 or 0 respectively, so that each said secondary user can be in one of four conditions, 00, 01, 10 and 11 that are first, second, third and fourth priority level respectively, wherein said selection of sensing node is completed based on joint consideration of current user condition (active or idle) and type of service (delay-sensitive or non-delay-sensitive) to select each said sensing node before sensing task is started.
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Abstract
This invention relates to a method for controlling location distribution of sensing nodes, selection of sensing nodes, control of sensing implementation and process of performing spectrum sensing in cognitive radio networks of open wireless architecture (OWA) systems. Specifically, the invention relates to an efficient and reliable method minimizing time overhead consumed during spectrum sensing with open wireless architecture (OWA).
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Citations
18 Claims
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1. An Open Wireless Architecture (OWA) spectrum sensing method for secondary user of spectrum in cognitive radio networks, said method comprising selection of sensing node, configuration for location of each said sensing node, sensing frame for control of sensing process, and division of sensing region, wherein configuration of said sensing node is based on node selection and node location in different divided small sensing areas, and implementation of said sensing process is based on both sensing scheduling and spectrum signal sensing, and
wherein priority for said selection of sensing node is divided into fourth levels, each denoted by two bits, f2 and f3 in said sensing frame, and for each said secondary user, active or idle condition is represented by letting f2 be 1 or 0 respectively, and delay-sensitive or non-delay-sensitive service is denoted by making f3 be 1 or 0 respectively, so that each said secondary user can be in one of four conditions, 00, 01, 10 and 11 that are first, second, third and fourth priority level respectively, wherein said selection of sensing node is completed based on joint consideration of current user condition (active or idle) and type of service (delay-sensitive or non-delay-sensitive) to select each said sensing node before sensing task is started.
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18. An Open Wireless Architecture (OWA) spectrum sensing method for secondary user of spectrum in cognitive radio networks, said method comprising selection of sensing node, configuration for location of each said sensing node, sensing frame for control of sensing process, and division of sensing region, wherein configuration of said sensing node is based on node selection and node location in different divided small sensing areas, and implementation of said sensing process is based on both sensing scheduling and spectrum signal sensing, and
wherein said method further comprising a process as to which frequency band is sensed by which said sensing node that is a cooperative sensing mechanism by using multiple selected said sensing nodes, wherein each said secondary user of spectrum is selected as one of said sensing nodes depending on its current service condition (active or idle) and if one said secondary user is idle, then it may be selected as one said sensing node to fulfill local spectrum utilization sensing with a local sensing result collected by a decision center of said spectrum sensing, otherwise it is not selected to complete sensing task, wherein priority for said selection of sensing node is divided into fourth levels, each denoted by two bits, f2 and f3 in said sensing frame for said control of sensing process, and for each said secondary user, active or idle condition is represented by letting f2 be 1 or 0 respectively, and delay-sensitive or non-delay-sensitive service is denoted by making f3 be 1 or 0 respectively, so that each said secondary user can be in one of four conditions, 00 01, 10 and 11 that are first, second, third and fourth priority level respectively, wherein said selection of sensing node is completed based on joint consideration of current user condition (active or idle) and type of service (delay-sensitive or non-delay-sensitive) to select each said sensing node before sensing task is started.
Specification