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MIMO relay selection method for selecting antenna based on network lifetime threshold

A life cycle and antenna technology, applied in diversity/multi-antenna systems, radio transmission systems, location diversity, etc., can solve problems such as unbalanced network load, failure to consider the principle of fairness, unfair energy consumption of nodes, etc.

Inactive Publication Date: 2017-05-24
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, increasing the number of antennas can improve the capacity to a certain extent. The existing relay selection algorithm usually considers the method of maximizing the system capacity to determine the antenna selection result, but it will bring some problems, such as the unfairness of node energy consumption. , unbalanced network load, low user experience satisfaction, etc.
This is because the relay selection method does not take into account the principle of fairness. The unfairness of relays leads to unbalanced equipment loads, and unbalanced loads have an adverse effect on obtaining high system capacity.
At the same time, for relay devices with battery energy storage, the energy will be consumed quickly, reducing the life cycle of the network and reducing user experience satisfaction

Method used

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Examples

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Embodiment

[0024] The main steps of the embodiment are as follows:

[0025] Step 1: At the relay selection time j, the received SNR at the destination node is greater than the SNR threshold r th The relay nodes of are selected into the candidate relay node set Ω, and the remaining energy of all relay nodes in the set is obtained. Step 2: For each relay node in the candidate relay node set Ω, taking relay node i as an example:

[0026] (1) Calculate the communication duration when the antenna m of the i-th relay node is selected respectively 1≤m≤N; when When , the antenna m is not selected; when When , the antenna m is selected into a selected antenna set Ψ of the relay node 1i ; Indicates the transmission power of the antenna m of the i-th relay node at the relay selection time j.

[0027] (2) For Ψ 1i Any two antennas in , respectively calculate and choose Ψ 1i Antenna a in 1 and antenna b 1 communication time when , the antenna a 1 and antenna b 1 Composed of antenn...

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Abstract

The invention discloses a multiple input multiple output (MIMO) relay selection method for selecting an antenna based on a network lifetime threshold, which controls antenna selection of an MIMO cooperative communication system by setting the network lifetime threshold and completes relay selection based on an antenna selection result. According to the MIMO relay selection method for selecting the antenna based on the network lifetime threshold, rest energy of relay nodes is considered during relay selection; in a cooperative communication network having battery-powered relay nodes, network loads can be balanced and network lifetime can be prolonged; and relative to the existing antenna selection algorithm, the method has greatly reduced computation complexity. The MIMO relay selection method for selecting the antenna based on the network lifetime threshold can be applied to not only the cooperative communication system having the battery-powered relay nodes, but also a cooperative communication system with coexisting battery-powered relay nodes and electric-network-powered relay nodes.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to an antenna and a relay selection method of a cooperative communication system. Background technique [0002] In a cooperative communication system, the quality of communication performance is related to the selection of relay nodes. Metrics to measure relay selection performance usually include capacity and outage probability. Select one or more relay nodes among multiple relay nodes as a cooperative partner to help the source node send signals to achieve the purpose of improving communication performance, which is the relay selection of cooperative communication. Nodes participating in cooperative communication can not only configure one antenna to form a virtual MIMO (Multiple Input Multiple Output) effect, but also configure multiple antennas to further improve system performance. Multi-antenna technology is also the development direction of future mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/026H04B7/0413H04B7/155
CPCH04B7/026H04B7/0413H04B7/15528
Inventor 周忠瑶肖琨
Owner GUANGXI NORMAL UNIV
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