QoS-Based Transmission Method in Cognitive Relay System

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

Active Publication Date: 2016-07-06
BEIJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
  • Application Information

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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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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 present invention provides a QoS-based transmission method in a cognitive relay system, comprising: obtaining the source nodes of the highest priority preset value transmission services, and according to the highest priority preset value source nodes of the transmission services , to form a channel set, select and allocate a channel for the source node according to the channel set, and select a suitable relay node for the destination node according to the allocated channel. The present invention provides a QoS-based transmission method in a cognitive relay system, and selects the source node with the largest required bandwidth for the source nodes of the highest priority preset value transmission services, and allocates a channel for the source node; Transmit services through the channels allocated for the source node, and select relays for the source node transmission services according to the channel coefficient matrix, thereby ensuring bandwidth requirements, minimizing user delays, and reducing the bit error rate of the system as a whole. Guarantee the user's QoS requirements.

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 Patents(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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