Method for selecting cooperative nodes in wireless communication network

Abstract

The invention discloses a method for selecting cooperative nodes in a wireless communication network, which can effectively improve cooperative diversity performance as well as the transmission capacity and reliability of the wireless communication system and ensure the requirement of the quality of service (QoS) of users. The method comprises the following steps: (1) an information source S sends relay requests to nodes around; (2) if the nodes are in leisure, a response signal is sent, and if no leisure node exists, the step (1) is continued; (3) if only one leisure node exists, the operation is switched into the step (6), and an AF or DF cooperative mode is directly adopted; (4) if a plurality of leisure nodes exist, the information source S calculates the distance L between the information source S and the leisure nodes according to the strength of a utilization signal, time difference, angle or GPS information, and then the leisure nodes send information to a target terminal, calculate the distance D between the leisure nodes and the target terminal according to the signal strength, the time difference, the angle or the GPS information and feed back the distance to the information source S; (5) the leisure node with the minimum product of the distance L and the distance D is selected as an optimum relay node; and (6) finally the system adopts the AF or DF cooperative mode.

Description

Technical field: [0001] The invention relates to a method for selecting a cooperative node in a wireless communication network, and belongs to the technical field of wireless communication. Background technique: [0002] With the development of wireless communication network technology, various wireless communication technologies have emerged one after another, which has made the available spectrum resources increasingly saturated. However, people's requirements for wireless communication systems are still increasing, and a wireless communication technology with higher transmission rate, lower cost, lower power, and stronger anti-interference ability is expected. However, in order to improve the performance of the wireless network communication system, diversity is usually required at the transmitting end. The transmit diversity in wireless communication generally requires the use of multiple antennas at the transmitting end. However, many wireless devices usually only have a sin...

AI Technical Summary

Problems solved by technology

Transmit diversity in wireless communication generally requires the use of multiple antennas at the transmitting end, but many wireless devices usually only have a single antenna due to size or hardware complexity constraints

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