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Multidimensional resource adaptive allocation-based coordinated cognitive transmission method

A technology of cooperative cognition and transmission method, which is applied in the field of cooperative cognitive transmission based on multi-dimensional resource adaptive allocation, which can solve scenarios where multiple cognitive users participate in collaboration, increase of authorization and cognitive service delay, and communication Quality degradation and other issues, to achieve the effect of improving spectrum utilization, performance improvement, and transmission performance

Active Publication Date: 2016-03-30
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the authorized user needs to return a part of time resources to the cognitive user, and the cognitive user alternately forwards the authorization information and sends its own data on the same channel, resulting in a delay between authorization and cognitive services Increase
The disadvantage of this method is that the authorized user needs to sacrifice a part of the bandwidth in exchange for the assistance of the cognitive user
The shortcomings of this method are: this method does not consider the scenario where multiple cognitive users participate in collaboration, and in the case of poor channel quality, the communication quality is severely degraded

Method used

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  • Multidimensional resource adaptive allocation-based coordinated cognitive transmission method
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  • Multidimensional resource adaptive allocation-based coordinated cognitive transmission method

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] refer to figure 1 , the schematic diagram of the system model of the present invention includes an authorized transmitter (Primarytransmitter, PT), an authorized receiver (Primaryreceiver, PR), K cognitive user pairs (ST i ,SR i ), where i=1,...,K, figure 1 Different gray levels are used to represent communication resources of different dimensions. ST i Configure multiple antennas, and configure single antennas for other nodes. PT selects one ST from K STs k (k∈{1,…,K}) assists in authorized transmission as a relay; and ST k The corresponding user pair (ST k ,SR k ) to obtain certain communication resource compensation. The relay cooperation mode adopts decoding and forwarding, and the relay realizes full duplex on two non-overlapping frequency bands. The total bandwidth of authorized users is W Hz, and a transmission cycle is T seconds, which ...

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Abstract

The invention provides a multidimensional resource adaptive allocation-based coordinated cognitive transmission method. The method comprises the steps of (1) configuring an antenna; (2) initializing the transmission period (t) to be 1; (3) acquiring the link rate information by an authorization transmitter PT; (4) taking into account the fairness of relay selection; (5) conducting the coordinated transmission of time domain, frequency domain and space domain; (6) updating the average rate of each cognitive relay STk. According to the technical scheme of the invention, the resource joint-use coordinated transmission of time domain, frequency domain and space domain is comprehensively utilized and the transmission performance of an authorized user is improved. In this way, the communication transmission opportunity is provided for cognitive users, so that the spectrum efficiency is improved. Scheduling weights are calculated based on the historical average rate of cognitive users, wherein a relay of a maximal scheduling weight is selected for realizing the fairness of relay selection. Therefore, a fair communication opportunity is provided for each of all cognitive users. The performances of the cognitive system in the survival time and the energy efficiency of cognitive users are also improved.

Description

technical field [0001] The present invention belongs to the technical field of communications, and further relates to a cooperative cognitive transmission method based on multi-dimensional resource adaptive allocation in the technical field of cooperative cognitive radio networks. The method can comprehensively utilize the time domain, frequency domain and air domain for cooperative transmission of resource joint sharing, which improves the transmission performance of authorized users, enables cognitive users to obtain communication transmission opportunities, and improves spectrum utilization. On the premise of improving the authorized transmission, the method can enable the cooperative cognitive users to obtain fair scheduling, and obtain performance improvements in cognitive system lifetime and cognitive user energy efficiency. Background technique [0002] With the rapid development of wireless communication, the contradiction between the scarcity of spectrum resources a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04W16/14H04W72/04
CPCH04B7/0613H04B7/0891H04W16/14H04W72/044Y02D30/70
Inventor 李钊李意文肖丽媛丁汉清
Owner XIDIAN UNIV
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