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Method and system for transmitting correct/wrong reply message

A technology for answering messages and error acknowledgments, which is applied in the direction of preventing/detecting errors through diversity reception, using return channels for error prevention/detection, network traffic/resource management, etc., and can solve the problem of not sending ACK/NACK response messages Program and other issues

Inactive Publication Date: 2009-11-25
ZTE CORP
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] It can be seen from the prior art that in the FDD system using CA technology, when the space division multiplexing mode is used for PDSCH transmission, there is no solution for sending ACK / NACK response messages

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  • Method and system for transmitting correct/wrong reply message
  • Method and system for transmitting correct/wrong reply message
  • Method and system for transmitting correct/wrong reply message

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Embodiment Construction

[0032] In the FDD system of carrier aggregation, when the base station has PDSCH scheduled for a certain UE on multiple downlink component carriers, and when the UE has no PUSCH to send in the current subframe, the terminal needs to feed back the multiple downlink components on the PUCCH The ACK / NACK response message transmitted by the PDSCH of the carrier. When the base station transmits the PDSCH in a manner of space division multiplexing on a scheduled downlink component carrier, the UE needs to feed back corresponding ACK / NACK response signals for both transmission blocks on the component carrier. It is assumed that the UE can obtain two PUCCH channels for feeding back the ACK / NACK response message of the PDSCH on the component carrier from the PDCCH of the downlink component carrier that adopts space division multiplexing, denoted as n PUCCH，TB1，i (1) and n PUCCH，TB2，i (1) , where i represents the index number of the downlink component carrier. figure 1 The flow chart...

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Abstract

The present invention provides a method and a system for transmitting the correct / wrong reply message. In a carrier-aggregated frequency division dual (FDD) system, which a base station is provided with a PDSCH scheduled to a certain UE in a plurality of downlink component carriers, PUCCH channels corresponding with the feedback state of the ACK / NACK reply message are respectively selected for two transmission blocks in each downlink component carrier, and the corresponding 2-bit information in the mapping relationship is transmitted on the PUCCH format 1b. According to the invention, the feedback state on each transmission block is transmitted with a mode of channel selection and PUCCH format 1b. Thus the UE can feed back the feedback information of all transmission blocks of the received descending component carrier, therefore the reducing of the system throughput performance is prevented and the system throughput is guaranteed. Simultaneously, when the base station configuration UE is in a receiving mode of space division multiplexing, the channel condition of the UE is better in general, and the detectability of the ACK / NACK reply message is guaranteed.

Description

technical field [0001] The invention relates to an error control technology in a digital communication system, especially a method and system for sending correct / error response messages. Background technique [0002] The rapid development of digital communication systems puts forward higher requirements for the reliability of data communication. However, under harsh channels, especially in high data rate or high-speed mobile environments, serious problems such as multipath interference and Doppler shift affect system performance. Therefore, effective error control technology, especially Hybrid Automatic Repeat Request (HARQ, Hybrid Automatic Repeat Request) technology has become a research hotspot in the communication field. [0003] In the HARQ mode, the code sent by the originating end can not only detect errors, but also have certain error correction capabilities. After receiving the codeword, the decoder at the receiving end first checks the error situation, if it is w...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/06H04W28/04H04W72/12
Inventor 梁春丽夏树强杨维维
Owner ZTE CORP
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