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Cooperative data transmission method and system for adaptive relay selection

A data transmission method and technology of a data transmission system, applied in the field of communication, can solve the problems of candidate relay terminal collision, shortening competition delay and the like

Inactive Publication Date: 2013-08-07
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a cooperative data transmission method and system for adaptive relay selection, which is used to solve the problem of collision between candidate relay terminals in the prior art, thereby effectively shortening the contention delay and effectively Improved throughput of data transfers

Method used

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  • Cooperative data transmission method and system for adaptive relay selection
  • Cooperative data transmission method and system for adaptive relay selection
  • Cooperative data transmission method and system for adaptive relay selection

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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] figure 1 A flowchart of an embodiment of the cooperative data transmission method selected for the adaptive relay of the present invention, such as figure 1 As shown, the execution subject of this embodiment is a neighboring terminal, which can also be called a candidate relay terminal, and the neighboring terminal is one hop away from oth...

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Abstract

The invention provides a cooperative data transmission method and a cooperative data transmission system for adaptive relay selection. The method comprises the following steps of: calculating withdrawal time according to a first transmission speed from a source terminal to an adjacent terminal, a second transmission speed from an adjacent terminal to a target terminal and a third transmission speed from the source terminal to the target terminal, which are acquired; if ready-to-help packets transmitted by other adjacent terminals are not intercepted, transmitting the ready-to-help packets to the source terminal and the target terminal respectively according to the withdrawal time, wherein every ready-to-help packet comprises the first transmission speed and the second transmission speed; receiving a cooperative clear to send (CCTS) packet replied by the target terminal; and receiving a data packet transmitted by the source terminal, and forwarding the data packet to the target terminal at the second transmission speed. So, the problem that candidate relay terminals compete and collide in the prior art is solved, a competition time delay is effectively shortened, and the throughputof data transmission is effectively improved.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a cooperative data transmission method and system for adaptive relay selection. Background technique [0002] Wireless communication technology is the fastest growing and most widely used communication technology in the field of communication in recent years. In wireless communication, due to channel fading and path loss, the received signal quality will be greatly degraded compared to that in wired channels. For this reason, various anti-interference and anti-noise wireless communication technologies have been proposed at present. Multiple-Input Multiple-Output (Multiple-Input Multiple-Output; MIMO for short) is one of the methods of using space diversity to greatly improve signal quality. Cooperative communication technology uses the idea of ​​MIMO to form a virtual antenna array through antennas distributed on different nodes to achieve the effect of MI...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04B7/04
Inventor 刘凯张玉鹏李亚燕刘锋
Owner BEIHANG UNIV
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