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Application of network encoding and constellation overlapped encoding combination in mobile communication

A technology of network coding and superposition coding, which is applied in the application field of the combination of network coding and constellation superposition coding in mobile communication, to achieve the effects of improving transmission efficiency, reducing the number of retransmissions, and improving system throughput and bit error performance.

Active Publication Date: 2009-03-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Application of network encoding and constellation overlapped encoding combination in mobile communication
  • Application of network encoding and constellation overlapped encoding combination in mobile communication
  • Application of network encoding and constellation overlapped encoding combination in mobile communication

Examples

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Embodiment Construction

[0030] For ease of understanding, the present invention takes the common Adaptive Multi-Rate Service (AMR) as an example to illustrate the application of constellation superposition coding (SC) to NC-HARQ technology. The present invention is generally applicable to all business models having the basic characteristics in this example.

[0031] AMR business can be divided into information of three different rates: I m1 , I m2 and I m3 where I m1 Message transmission error requires retransmission, I m3 Transmission errors do not require retransmission, I m2 Between Im 1 and Im 3 between. We will Im 1 Corresponding to the type A information in the above model, I m2 I m3 Corresponding to B type information.

[0032] At the originating end S, a piece of AMR service is divided into I information blocks, which are A1 , A 2 ,...,A I and B 1 , B 2 ,...,B I . At each time slot i of the transmission, A i Mapped to the basic constellation diagram (Basic) of SC, the B i M...

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Abstract

The technical scheme of the invention is used in a one-to-many broadcast communications system, which further optimizes the performance of the system by combining two up-to-the-minute communications technologies, namely network coding (NC) and stacked coding (SC), and designing to simultaneously utilize the gain in the aspects of system throughput, time delay and the like. The technical scheme is easy to achieve, and the application method is relatively flexible. The information for transmission is reasonably designed during first transmission and retransmission, and the NC technology and the SC technology are effectively combined. Firstly, information with different priorities is reused on different constellations of the SC, thereby increasing the throughput of the system; and then during retransmission, according to the wrong patterns fed back from a receiving end recorded by a sending end, the retransmitted information is designed by using network coding, and the coded information is transmitted by using stacked coding, thereby reducing the retransmission times and the retransmission time delay.

Description

technical field [0001] The present invention combines two latest technologies: network coding (Network Coding, NC) and constellation superposition coding (Superposition Coding, SC) and then applies them to common mobile communication networks, or other similar mobile communication networks Communication networks with fading characteristics. The combination of NC and SC can effectively reduce the number of retransmissions and improve transmission efficiency, thereby improving the throughput and bit error 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 the physical layer and the network layer...

Claims

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Application Information

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IPC IPC(8): H04L12/18H04L1/18H04L1/16
Inventor 陈力张欣杨大成
Owner BEIJING UNIV OF POSTS & TELECOMM
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