Method for applying combination of network encoding and constellation overlapped encoding in collaboration relay system

A network coding and cooperative relay technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., to achieve the effect of improving system throughput performance, system performance, and transmission efficiency

Active Publication Date: 2009-03-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the wireless research and application of NC is still in the exploratory stage.

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  • Method for applying combination of network encoding and constellation overlapped encoding in collaboration relay system
  • Method for applying combination of network encoding and constellation overlapped encoding in collaboration relay system
  • Method for applying combination of network encoding and constellation overlapped encoding in collaboration relay system

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Embodiment Construction

[0025] For ease of understanding, the present invention uses a network consisting of 4 terminal nodes T 1 ,T 2 ,T 3 ,T 4 Taking a cooperative relay network composed of a relay node R as an example, the method of combining NC and SC in application is described. Suppose T 1 with T 2 The nodes are within the communication range of each other, that is, they can monitor each other's information, T 3 with T 4 Nodes can also listen to each other's information similarly. They need to communicate with each other through relay nodes, that is, the information of each terminal node needs to be transmitted to all other nodes. The present invention is generally applicable to all network structure models having the basic features in this example.

[0026] During uplink transmission, each terminal node T i (i=1, 2, 3, 4) send its own unique information I to the relay node R i At the same time, listen to the terminal node T adjacent to it (within its communication range) j Informati...

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Abstract

The invention provides a technical proposal used in a cooperative relay system, which further optimizes system throughput by integrating two up-to-date communication technologies including network coding (NC) and cooperative superposition coding (SC) and designing to utilize the two technologies in saving system resources at the same time. The proposal is easy to implement and has flexible application ways. The invention effectively integrates the NC and the SC technologies during forwarding information at relay nodes. The technical proposal comprises the steps of performing network coding of information of as many demodulated nodes with relatively better channel conditions as possible and mapping to an SC basic constellation map, and mapping NC information on an additional constellation map and broadcasting to all nodes. The technical proposal greatly saves system resources, so as to remarkably improve the system throughput.

Description

technical field [0001] The present invention combines two latest wireless transmission technologies: network coding (Network Coding, NC) and constellation superposition coding (Superposition Coding, SC) and then applies them to the cooperative relay communication system (Cooperative Relay), or other In a communication network with similar structural characteristics to the cooperative relay communication network. Combining NC and SC can effectively utilize wireless resources and improve transmission efficiency, thereby improving the throughput performance of the entire system. The invention can embody the advantages of NC and SC in improving system performance at the same time, so that their gains can achieve a superposition effect. Background technique [0002] As a major breakthrough in the field of communication in the 21st century, Network Coding (NC) has attracted more and more attention due to its ability to achieve multicast capacity. NC combines two core concepts of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L12/18H04L29/06H04L12/56
Inventor 陈力陈文文张欣杨大成
Owner BEIJING UNIV OF POSTS & TELECOMM
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