QoS-based transmission method in cognitive relay system

A technology of cognitive relay and relay node, applied in the field of QoS-based transmission, can solve the problems of not considering the fading characteristics of cooperative links, and the performance of bit error rate is not optimal.

Active Publication Date: 2013-12-18
BEIJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, the existing technical solutions use all relays to participate in beamforming, without considering the fading characteristics of different cooperative links, and the bit error rate performance is not optimal

Method used

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  • QoS-based transmission method in cognitive relay system
  • QoS-based transmission method in cognitive relay system
  • QoS-based transmission method in cognitive relay system

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Experimental program
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Embodiment 1

[0040] The present invention provides a QoS-based transmission method in a cognitive relay system, the flow chart of the method is as follows figure 1 As shown, the method includes:

[0041] S1: Obtain the source nodes of the highest priority preset value transmission services, and form a channel set according to the highest priority preset value source nodes of the transmission services;

[0042] S2: According to the source nodes of the highest priority preset value transmission services, calculate the transmission time of the transmission services of the source node with the largest required bandwidth on each channel in the channel set, and calculate the transmission time according to the transmission time for the The source node with the largest required bandwidth allocates the channel;

[0043] S3: According to the channel allocated for the source node, the source node requests channel information from the destination node, constructs a channel coefficient matrix accordin...

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Abstract

The invention provides a QoS-based transmission method in a cognitive relay system. The method includes the steps of acquiring a preset number of service transmission source nodes with the highest priority, forming an information channel set according to the preset number of service transmission source nodes with the highest priority, selecting the source node needing the largest bandwidth according to the information channel set, distributing an information channel to the source node needing the largest bandwidth, and selecting a suitable relay node for a destination node according to the distributed information channel. According to the QoS-based transmission method in the cognitive relay system, the source node needing the largest bandwidth is selected from the preset number of service transmission source nodes with the highest priority, and the information channel is distributed to the source node needing the largest bandwidth; services are transmitted through the information channel distributed to the source node, a relay is selected for service transmission of the source node according to an information channel coefficient matrix, therefore, bandwidth requirements are met, user time delay is minimized, the error rate of the system is reduced, and QoS requirements of a user are met on the whole.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a QoS-based transmission method in a cognitive relay system. Background technique [0002] With the continuous development of wireless communication technology, people's requirements for transmission services in the system transmission process are also increasing. In the process of system transmission, some quality of service parameters such as user delay, channel bandwidth, and system bit error rate are all affecting the transmission speed and reliability of transmission services. The QoS of transmission services is becoming more and more a part of the system transmission process. An important factor that affects the quality of transmission services. In particular, in cognitive radio systems, the number and frequency band positions of available spectrum resources change dynamically with the spectrum usage of authorized users. The time-varying nature of such spect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/24H04W72/04
Inventor 滕颖蕾张勇马跃李元锋王莉魏翼飞满毅宋梅刘洋翁航陶雄强邢益海
Owner BEIJING UNIV OF POSTS & TELECOMM
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