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Relay selection method for decode-and-forward relay networks

A relay network, decoding and forwarding technology, applied in the field of relay selection of decoding and forwarding relay networks, can solve the problem of not considering uplink and downlink at the same time, not to ensure fairness among multiple users in relay selection, and not considering simultaneous The problem of serving multiple users, etc., to achieve the effect of transmitting power and beamforming optimization

Inactive Publication Date: 2018-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1) The situation of serving multiple users at the same time is not considered, and the relay selection is not made to ensure fairness among multiple users;
[0006] 2) The uplink and downlink are not considered at the same time;
[0007] 3) The total transmit power of all sources and the total transmit power of all relays are not considered at the same time

Method used

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  • Relay selection method for decode-and-forward relay networks
  • Relay selection method for decode-and-forward relay networks
  • Relay selection method for decode-and-forward relay networks

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Embodiment Construction

[0019] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0020] When the goal of relay selection is set to consider the uplink and downlink at the same time, the variables of the uplink and downlink will be coupled together, resulting in an increase in the dimension of the optimization problem. It is very difficult to solve this problem directly, and its calculation method It will also become very complicated and cumbersome. In order to make this complex process achievable, in particular, the coupled uplink and downlink variables can be decomposed as much as possible to make distributed solutions possible. In the present invention, through a series of derivations and simplific...

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Abstract

The invention discloses a relay selection method for a decoding and forwarding relay network. The method includes: a construction step, an iteration step, an adjustment step and a selection step. Under the premise of limiting the total transmission power of all sources, the total transmission power of all relays and the maximum number of virtual relays, the method can make the minimum signal-to-interference ratio of the uplink and downlink of each served user maximize. In addition, transmit power and beamforming at the source and transmit power and beamforming at the relay can be optimized.

Description

technical field [0001] The invention relates to the technical field of decoding and forwarding relays, in particular to a relay selection method for a decoding and forwarding relay network. Background technique [0002] In a Decode-and-Forward multi-relay network, relays can cooperate to transmit data information from a source end to a destination end. figure 1 A two-hop decode-and-forward multi-relay network is shown, which includes K relays, M sources and M destinations. The M source terminals and the M destination terminals may also be referred to as M serviced user pairs. From the source to the relay can be called uplink, from the relay to the destination can be called downlink. [0003] Under certain backhaul constraints, multiple relays (at least one) can be selected from these K relays to form a large virtual relay, and provide decoding and forwarding services for M sources and M destinations at the same time . An existing relay selection method is to select the b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/22
CPCH04W40/22Y02D30/70
Inventor 林静然汪寒成姜昌旭利强
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA