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

Abstract

A method for transmitting an Acknowledgement / Negative Acknowledgement (ACK / NACK) message, which is suitable for a terminal in a wider bandwidth multi-carrier system to perform the ACK / NACK. The method includes: according to carrier aggregation allocation information in the multi-carrier system, detecting each downlink component carrier which is allocated to the terminal and obtaining the ACK / NACK message HARQ_ACK(i) of each downlink component carrier; and according to a combination state {HARQ_ACK(0),HARQ_ACK(1),...,HARQ_ACK(M-1)} of the ACK / NACK messages of the downlink component carriers, selecting one available Physical Uplink Control Channel­­­­ (PUCCH) n(1) PUCCH and adopting a format 1b of the PUCCH to send 2-bit information of the ACK / NACK message by the terminal, and the 2-bit information is recorded as b(0)b(1), wherein the M is the number of the downlink component carriers allocated to the terminal, the available PUCCH is one of the M PUCCHs which correspond to M downlink component carriers, i.e. n(1) PUCCH?n(1) PUCCH, i, i=0,1,...M-1.

Description

Technical field [0001] The present 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 a large bandwidth. 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 rates or high-speed mobile environments, multipath interference and Doppler shift are serious. Ground affects system performance. Therefore, effective error control technology, especially Hybrid Automatic Repeat Request (HARQ) technology, has become a hot spot in the communication field. [0003] In HARQ mode, the code sent by the sender 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 condition. If it is within the error correction capability ...

AI Technical Summary

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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