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Frequency spectrum admission control method based on cooperative frequency spectrum sensing

An admission control and cooperative spectrum technology, which is applied in the field of spectrum admission control based on cooperative spectrum sensing, and can solve the problems of not considering the error detection probability of spectrum sensing accuracy and not considering the impact, etc.

Inactive Publication Date: 2012-09-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This admission control method can effectively reduce the forced outage probability of secondary users, but these studies did not consider the influence of the actual wireless channel and the error probability of secondary user spectrum sensing, nor did they consider how to improve the accuracy of spectrum sensing to minimize Probability of False Detection

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  • Frequency spectrum admission control method based on cooperative frequency spectrum sensing
  • Frequency spectrum admission control method based on cooperative frequency spectrum sensing
  • Frequency spectrum admission control method based on cooperative frequency spectrum sensing

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Embodiment Construction

[0097] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0098] In one embodiment of the present invention, the scenario is a topology consisting of 4 PUs and 30 SUs, and the number of authorized channels is the same as the number of primary users, and there is a common control channel dedicated to SUs. Such as figure 1 As shown, each SU first forms SUGs according to the SUG-based cooperative strategy scheme.

[0099] 1) Implementation phase of SUG-based cooperation strategy (CSSUG) scheme:

[0100] After network initialization, all SUs are marked as cooperative nodes SU cop , which has data to send to the SU cop Mark as source node SU sor , all nodes generate two maintenance lists: MemberTable and PCL, and reserve α (αsor Check whether its MemberTable is full, if not, broadcast Invite control information to its neighbor nodes on the control channel, its neighbor nodes receive t...

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Abstract

The invention provides a frequency spectrum admission control method based on cooperative frequency spectrum sensing. The method comprises the following steps: (1) through a cooperative scheme based on a secondary user group (SUG), self-adapting each secondary user SU to form SUGs; (2) for a cooperative sensing fusion strategy, carrying out calculation on a source node SUsor through a cooperative frequency spectrum sensing scheme so as to obtain an optimal value k under the situation of a given n value; and (3) for an acceptance control threshold of a cognitive radio network, analyzing an optimal acceptance control threshold, which can maximize throughput of the SUGs under the restriction condition of global false alarm probability, through a frequency spectrum acceptance control scheme based on cooperative sensing; and through solving of the optimal acceptance control threshold, finishing the whole optimizing process. According to the invention, the frequency spectrum frequency of the network is very well improved and the throughput of the SUGs can be also effectively increased; and the frequency spectrum acceptance control method based on cooperative frequency spectrum sensing, provided by the invention, is applicable to frequency spectrum access and frequency spectrum switching strategies in the cognitive radio network as well as corresponding performance analysis.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a spectrum admission control method based on cooperative spectrum sensing. Background technique [0002] In a wireless network, admission control is mainly used to limit the number of users running in the system, so that the system will not make the limited spectrum resources of the system very crowded due to the access of too many users. The two main objectives of admission control are: (1) to ensure the quality of service (Quality of Service, QoS) of users who are communicating in the system and users who have just connected to the system; (2) to distinguish the priority of different users in different service levels. The purpose of admission control is to maximize the utility function of the system in the admission area. [0003] In cognitive wireless networks, admission control focuses on prioritizing primary users (Primary Users, PUs) and secondary us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10
Inventor 吴呈瑜何晨蒋铃鸽
Owner SHANGHAI JIAO TONG UNIV
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