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Cooperative data transmission method and system for adaptive relay selection

A data transmission method and a technology of a data transmission system, which are applied in the field of communication and can solve problems such as candidate relay terminal collisions and shortening competition delays

Inactive Publication Date: 2011-06-15
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

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  • 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 objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

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

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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] The embodiments of the present invention relate to communication technology, and in particular to a method and system for cooperative data transmission based on adaptive relay selection. Background technique [0002] Wireless communication technology is the fastest growing and most widely used communication technology in the communication field in recent years. In wireless communication, due to channel fading and path loss, the received signal quality will be significantly lower than in wired channels. For this reason, various anti-interference and anti-noise wireless communication technologies have been proposed. Multiple-Input Multiple-Output (MIMO) is one of the methods that uses spatial diversity to greatly improve signal quality. The cooperative communication technology uses the idea of ​​MIMO, forming a virtual antenna array through antennas distributed on different nodes to achieve the effect of MIMO diversity. Compared with non-cooperative system...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04B7/04H04L12/56
Inventor 刘凯张玉鹏李亚燕刘锋
Owner BEIHANG UNIV
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