Method and device for transmitting hybrid automatic repeat request feedback information

Abstract

The invention provides a method and a device for transmitting hybrid automatic repeat request (HARQ) feedback information, which are used for solving the problem of relatively low reliability of transmission of the HARQ feedback information in the prior art. The method comprises the following steps: performing CRC on the current subframe of a decoded HS-PDSCH to acquire a CRC result; when CRC interruption is generated, generating a CRC result response message according to the CRC result, and calculating a subframe difference value between the current subframe of the HS-PDSCH and a subframe transmitted on the HS-PDSCH when the CRC interruption is generated; and determining a corresponding subframe header of the subframe transmitted on the HS-PDSCH according to the corresponding relationship between the subframe difference value and the header of the subframe transmitted on the HS-PDSCH, and the corresponding relationship between a set subframe difference value and the header of the subframe transmitted on the HS-PDSCH, and then transmitting the CRC result response message on the HS-PDSCH channel when the subframe header is transmitted. According to the technical scheme of the invention, the method and the device can improve the reliability of the transmission of the HARQ feedback information.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and a device for sending hybrid automatic repeat request feedback information. Background technique [0002] HSDPA (High Speed ​​Downlink Packet Access) was proposed in the third generation cooperation organization 3GPP (3rd Generation Partnership Project) protocol R5 and R6 versions, it is the R99 version in terms of data services such as Internet, video / audio stream transmission upgrades and additions. Compared with traditional services, data services have the characteristics of low delay requirements and high flow requirements. It mainly introduces the following key technologies: [0003] (1) Adaptive Coding Technology (AMC) [0004] The core idea of ​​AMC is that the network side selects the best downlink modulation and coding method according to the current wireless channel quality and network resource usage, so as to increase the data throughput of end user...

AI Technical Summary

Problems solved by technology

It can be seen that due to the bursty nature of the reception of the downlink channel HS-PDSCH, its subframe transmission time and decoding time are uncertain, so the time when the UE completes receiving the HS-PDSCH subframe is different from the time when the subframe is actually sent. There is a delay of uncertain length between the times, so there is an error of varying sizes between the time when the UE knows that the subframe has been sent and the time when the subframe has actually been sent. When the error is large, the UE will send The ACK / NACK information has exceeded the receiving time limit of Node B, which will cause this transmission to fail, and will cause all subsequent transmissions to be wrong, and the entire link will have to be re-established. Therefore, the transmission of HARQ feedback information based on system time less reliable

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