Network coding feedback method for coordinated multi-point transmission system

A network coding and transmission system technology, applied in the field of feedback transmission scheme and network coding feedback, can solve the problems of large feedback overhead and reduce feedback overhead.

Inactive Publication Date: 2011-07-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0009] Aiming at the problem that the feedback overhead of the existing feedback scheme in the CoMP system is relatively large, the present invention p

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  • Network coding feedback method for coordinated multi-point transmission system
  • Network coding feedback method for coordinated multi-point transmission system
  • Network coding feedback method for coordinated multi-point transmission system

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Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the invention clearer, the embodiments of the invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0040] as attached figure 1 As shown, the base stations eNB1 and eNB2 serve the user UE at the same time (the present invention is only limited to the case where two base stations serve one UE, and the two base stations serve the UE at the same time, regardless of sequence, two different transmissions only occupy one time slot, The system throughput can be improved, which is the advantage of the solution proposed in this patent). After a downlink transmission, the UE not only needs to send the pilot information (...

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Abstract

The invention discloses a network coding feedback method for a coordinated multi-point transmission system, which belongs to the technical field of communication. Information such as pre-coding matrix indicator (PMI) information required to be fed back and own information such as reference signal (RS) information periodically to be transmitted are subjected to network coding and then transmitted. A network coding concept is introduced to simultaneously transmit feedback information under the condition of keeping constant conventional uplink transmission overhead. A transmitted information sequence subjected to the network coding still has relatively higher cross correlation and autocorrelativity, so a receiver obtains the PMI information by a correlation detection and minimum Euclidean distance searching method, and own information required to be fed back is hidden in a sounding RS (SRS) sequence subjected to the network coding in a network coding way by taking SRS information required to be transmitted by the system as a carrier to improve the transmission effectiveness and effectively improve the throughput of the system by reducing even eliminating feedback overhead.

Description

technical field [0001] The invention relates to a feedback transmission scheme in a communication system, in particular to a network coding feedback method for reducing system feedback overhead on the basis of maintaining system transmission reliability, and belongs to the technical field of communication. Background technique [0002] In the coordinated multi-point transmission (CoMP) system, the design of the feedback scheme has a great impact on the system performance. Various implicit feedback, explicit feedback and feedback schemes based on SRS (Sounding RS) are currently hot topics of discussion among major companies. . In the design process of various feedback schemes, feedback overhead is a very important factor to consider. It is necessary to keep the degradation of the performance of the feedback scheme as little as possible under the premise of reducing the feedback overhead as much as possible. For example, in the implicit feedback scheme, the feedback informatio...

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Application Information

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IPC IPC(8): H04L1/00H04L1/16
Inventor 费泽松赵帝黄盖世杨昂匡镜明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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