Method for sending correct/wrong response message in multicarrier system with big bandwidth

A multi-carrier system, error response technology, applied in the direction of transmission system, digital transmission system, using the return channel for error prevention/detection, etc., to achieve the effect of full fault tolerance and compatibility

Inactive Publication Date: 2009-12-02
ZTE CORP
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Problems solved by technology

However, one of the main disadvantages of this method is that if the mapping method in the TDD system is directly used, the base station can only schedule 4 downlink component carriers for the UE at the same time. Considering the current system bandwidth problem of carrier aggregation, it can support up to 100MHz. So there are 5 component carriers after carrier aggregation

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  • Method for sending correct/wrong response message in multicarrier system with big bandwidth
  • Method for sending correct/wrong response message in multicarrier system with big bandwidth
  • Method for sending correct/wrong response message in multicarrier system with big bandwidth

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] In a system using carrier aggregation technology, when the base station has PDSCH scheduled for a certain UE on M downlink component carriers, and when the UE has no PUSCH to send in the current subframe, the terminal needs to feed back the M ACK / NACK response message for PDSCH transmission of downlink component carriers. For the large bandwidth multi-carrier system adopting the carrier aggregation technology, there is no better feedback method of the correct / wrong response message at present, and the present invention provides a corresponding method for sending the correct / wrong response message.

[0055] The present invention aims to provide the state combinations of ACK / NACK response messages of M downlink component carriers, the selected PUCCH channel a...

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Abstract

The invention discloses a method for sending a correct/wrong response message, which is suitable for a correct/wrong response of a terminal in a multicarrier system with big bandwidth, and comprises that: according to carrier aggregation allocation information in the multicarrier system, each downlink component carrier allocated to the terminal is detected, and a correct/wrong response message HARQ_ACK(i) of each downlink component carrier is obtained; and the terminal selects an available physical uplink control channel N[PUCCH] according to a combined state [HARQ_ACK(0), HARQ_ACK(1), ellipsis, HARQ_ACK(M-1)] of correct/wrong response messages of downlink component carriers, and adopts a format 1b of the physical uplink control channel PUCCH to send 2-bit correct/wrong response message information recorded as b(0)b(1), wherein M is the number of the downlink component carriers allocated to the terminal; and the available physical uplink control channel is one of M physical uplink control channels corresponding to the M downlink component carriers, namely NPUCCH belongs to a set of N[PUCCH, i], wherein i=0, 1, ellipsis, M-1.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method for sending correct / error response messages in a multi-carrier system with large bandwidth. Background technique [0002] The rapid development of digital communication systems has put forward higher requirements for the reliability of data communication. However, under harsh channels, especially in high data rate or high-speed mobile environments, serious multipath interference and Doppler frequency shift affect system performance. Therefore, effective error control technology, especially Hybrid Automatic Repeat Request (HARQ) 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, and if it is within the error co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18H04W72/14
CPCH04W72/0406H04L1/1607H04L1/0029H04L1/1812H04W28/04H04W72/20
Inventor 梁春丽张禹强夏树强
Owner ZTE CORP
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