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Routing and time slot distributing method on basis of main user protection in cognitive radio network

A cognitive radio and time slot allocation technology, applied in network planning, wireless communication, electrical components, etc., to achieve the effect of improving network capacity, increasing throughput, and reducing computational complexity

Inactive Publication Date: 2012-10-10
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the secondary user in the cognitive radio network can obtain as high a throughput as possible through reasonable selection of paths and time slots without causing excessive interference to the primary user; in view of this, the present invention A distributed routing and time slot allocation scheme is proposed. Through the interaction of local information between nodes, a route and time slot allocation that can meet the interference threshold limit of the primary user and increase the throughput of the secondary user can be found. method

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  • Routing and time slot distributing method on basis of main user protection in cognitive radio network
  • Routing and time slot distributing method on basis of main user protection in cognitive radio network
  • Routing and time slot distributing method on basis of main user protection in cognitive radio network

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0036] figure 1 The network model applicable to the method of the present invention is given. exist figure 1 There is a primary user receiver H in the cognitive Ad Hoc network shown, and its interference threshold is set to In T , the secondary user configuration has two transceivers: a control transceiver and a data transceiver. The control transceiver works on a dedicated channel in CSMA / CA mode, and its transmission range is set to the interference range R of the data transceiver I . Each node has the ability to obtain its current location information and primary user interference threshold. The data transceiver of the secondary user accesses the frequency band of the primary user by means of time division multiplexing. exist figure 1 Although the path s→a→g→e→d from the source node to the destination node will h...

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Abstract

The invention discloses a routing and time slot distributing method on the basis of main user protection in a cognitive radio network for a distributive cognitive radio network. The method comprises the following steps of designing a reasonable chain measuring and routing information spreading mechanism to search a source-to-target node communication route for a secondary user in a network; and on the premise of not causing over interference to a main user, increasing flow of a throughput bottle-neck link in the route by using the time slot distributing method, so that the throughput of the secondary user in the network is improved. Through reasonable routing and time slot distribution, a primary user and the secondary user in the distributive cognitive radio network can use a frequency band authorized by the main user at the same time and over interference to the main user is not caused. Theoretical analysis and simulation result show that compared with the current routing algorithm, the method can reduce calculation complexity and efficiently increase the throughput of the secondary user simultaneously.

Description

Technical field: [0001] The present invention relates to a method and mechanism for assigning routes and time slots between secondary user nodes in a distributed cognitive radio network, and in particular provides a distributed route and time slot assignment method based on primary user protection. Background technique: [0002] With the rapid increase of mobile communication users and business volume, the frequency resource utilization of the existing cellular network is approaching the limit. However, in some TV frequency bands, the utilization rate of spectrum resources is very low. Cognitive radio is an intelligent wireless communication technology proposed to solve the problem of effective utilization of spectrum resources. In a cognitive radio network, secondary users (Secondary Users, SUs) can use the frequency spectrum of primary users (PUs) to communicate without causing excessive interference to primary users (Primary Users, PUs). In the existing research on the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W40/16H04W40/28
CPCY02D30/70
Inventor 任品毅陈浩孙黎杜清河王熠晨齐备
Owner XI AN JIAOTONG UNIV
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