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Throughput forecast-based global optimization relay node selection method

A relay node and overall optimization technology, applied in electrical components, wireless communication, etc., can solve the problem of limited improvement of communication quality, achieve the effect of enhancing edge coverage performance, avoiding conflicts, and enhancing coverage

Active Publication Date: 2015-05-13
XI AN JIAOTONG UNIV
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Problems solved by technology

However, this method only starts from the link quality. Although the "bottleneck effect" of the link is considered, it can only passively select users with better link quality, which cannot avoid the waste of resources caused by the "bottleneck effect". Improvement is quite limited

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  • Throughput forecast-based global optimization relay node selection method
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  • Throughput forecast-based global optimization relay node selection method

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] The present invention improves the traditional opportunistic relaying algorithm (Opportunistic Relaying, referred to as OR algorithm), and proposes an overall optimized relay node selection algorithm based on throughput prediction (Throughput Prediction Relaying, referred to as TRP algorithm), and the application scenario is based on a cell For example, but not limited to cell scenarios. On the basis of inheriting the design idea of ​​the traditional OR algorithm, the TPR algorithm improves the relay node selection rule from link quality to throughput. At the same time, the prediction link of throughput is added to make the selection algorithm more perfect.

[0047] refer to figure 1 , the present invention takes a cell as an example, a base station is placed in the center of the cell, figure 1 , the central circle is the one-hop user distri...

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Abstract

The invention provides a throughput forecast-based global optimization relay node selection method. At an initial distribution stage, one-hop users and two-hop users are distinguished according to downlink path loss values of the users; the resource is initially distributed into two parts by a base station according to proportions occupied by the one-hop users and the two-hop users. Idle users in a communication range of the two-hop users are incorporated into an alternative relay set by the two-hop users; link information is reported to the base station by all alternative relay nodes; resource blocks distributed by access links and return links are set to be variables by the base station; the proper relay node is selected by each two-hop user by the throughput forecast-based global optimization relay node selection algorithm, so the overall throughput is the maximum. The throughput of the system is more intuitively and effectively improved, rational utilization of the resource is realized from an overall aspect in combination with a Hungarian algorithm, the resource waste caused by a bottleneck effect can be actively avoided, and the communication quality is greatly improved.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a strategy for effectively selecting a relay node for a multi-hop cellular communication system, in particular to an overall optimized relay node selection method based on throughput prediction. Background technique [0002] With the development of wireless communication technology and the continuous evolution of networks, more and more new services have put forward new requirements for the coverage performance of cellular networks. Especially in dense urban areas, urban blind spots, indoor environments, high-speed railways, rural areas, etc., the coverage performance of the network is often limited, and it is difficult to guarantee the communication quality of users at the edge of the network. How to enhance network coverage in these specific scenarios to meet the requirements of new services has become an urgent problem to be solved. As a way to effectively improve network ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W24/06
Inventor 曲桦赵季红宋亚兰闫飞宇徐西光
Owner XI AN JIAOTONG UNIV
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