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Relay node selection method of cooperation communication

A relay node and cooperative communication technology, which is applied in the direction of data exchange, electrical components, and transmission systems through path configuration, can solve problems such as collisions and failure of relay users, and achieve the effect of avoiding resource overhead and collisions

Inactive Publication Date: 2009-01-14
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention provides a method for selecting a relay node in cooperative communication in order to solve the problem that the existing method for selecting a relay node in cooperative communication has serious collisions when there are many relay applications, resulting in failure of relay users.

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  • Relay node selection method of cooperation communication
  • Relay node selection method of cooperation communication
  • Relay node selection method of cooperation communication

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specific Embodiment approach 1

[0013] Specific implementation mode one: see Figure 1 to Figure 5 , this embodiment consists of the following steps:

[0014] Step 1. The source node sends a coordinated communication request to the base station;

[0015] Step 2. When the nodes around the source node hear that the source node sends a cooperative communication request to the base station, the nodes communicating with the base station use their own traffic channels to forward the cooperative communication request of the source node, and the idle nodes ignore the cooperative communication request;

[0016] Step 3: After the base station receives the coordination request sent by the source node and the request forwarded by the surrounding working nodes, it selects a node with better communication quality as the relay node, sends a confirmation signal to the relay node, and (Frequency resources or time slot resources) Assign the relay channel (corresponding frequency band or time slot) to the relay node under the...

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Abstract

A relay node selection method in cooperative communication, relates to a selection method of the relay nodes, which solves the problems that relay users are not generated caused by severe collision when a plurality of relay applications are present in the relay node selection method of the cooperative communication. Nodes around source nodes transmit cooperative communication request to a base station, and leisure nodes ignore the cooperative communication request; the base station selects the nodes with better communication quality as the relay nodes, and distributes relay signals to the relay node; the relay nodes transmit the information of the resource nodes to the base station, selects the nodes which match with quality request as standby relay nodes; when the relay nodes detect that quality of the resource node descends, the relay nodes are exchanged; the base station devices to continue relaying or stop relaying according to the receiving quality. According to the invention, the nodes communicating with the base station around the resource nodes are selected as the relay nodes, without quantity of free users to generate relay request, thereby avoiding the generation of the collision, to successfully complete the relay process.

Description

technical field [0001] The invention relates to a method for selecting a relay node, which belongs to the cooperative communication technology in the field of wireless communication. Background technique [0002] In a wireless environment, when the transmitted signal reaches the receiving end through multiple paths, multipath fading will occur, which seriously affects the normal reception of the signal, and diversity is one of the effective techniques to combat fading. Diversity technology includes time diversity, frequency diversity, space diversity, etc. Cooperative communication technology is a kind of space diversity technology. The basic idea of ​​cooperative communication is that users can share each other's antennas to build a virtual multiple-input multiple-output system, which enables multi-user single-input single-output (SISO) systems to obtain the benefits of multiple-input multiple-output (MIMO) systems. At the same time avoid the impact of spatial correlation ...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L29/06
Inventor 沙学军唐珣张中兆徐玉滨谭学治顾学迈王荆宁卢为党
Owner HARBIN INST OF TECH
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