Method and device for transmitting feedback information

Abstract

The invention discloses a method and a device for transmitting feedback information, and are used for enabling UE (user equipment) to efficiently judge a lost condition of a downlink dynamic scheduling signaling so as to feed back more accurate ACK / NACK (Acknowledgement / Negative Acknowledgement) feedback information, and are also used for reducing the bit number occupied by the ACK / NACK feedback information on each carrier so as to ensure the demodulating property of uplink transmission. The method comprises the following steps: utilizing the UE to receive the downlink dynamic scheduling signaling which contains the specific indicating information used for indicating if the downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling corresponding to a same carrier in a feedback window in which the downlink dynamic scheduling signaling is placed, wherein the feedback window is one or more downlink sub-frame for sending the feedback information by using a same uplink sub-frame; confirming the feedback information corresponding to the feedback window on the carrier corresponding to the downlink dynamic scheduling signaling by the UE according to the downlink dynamic scheduling signaling received from the same feedback window; and lastly sending the feedback information.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for transmitting feedback information. Background technique [0002] The acknowledgment (ACK) / non-acknowledgement (NACK) feedback information combination processing scheme of Release 10 (Rel-10) is to solve the problem of inaccurate feedback information caused by the loss of downlink dynamic scheduling signaling, requiring each carrier to feedback 2 bits of combined feedback information. For the carrier aggregation (Carrier Aggregation, CA) system of Rel-11 5-carrier aggregation, if the combined processing scheme of Rel-10 feedback information is used, 10-bit information will be fed back, which will seriously affect the uplink physical uplink control Channel (PUCCH) transmission performance. [0003] Firstly, the carrier aggregation technology will be introduced below. [0004] In the long-term evolution (LTE) and previous wireless communic...

AI Technical Summary

Problems solved by technology

After the base station receives the ACK information, it will not retransmit the data, and the fourth downlink dynamic scheduling signaling will be lost, which will definitely affect the downlink data transmission performance

[0016] To sum up, the Rel-10 ACK / NACK feedback information combination scheme in the prior art requires each carrier to feed back 2 bits of combined information in order to solve the problem of inaccurate feedback information caused by the loss of downlink dynamic scheduling signaling

However, for a Rel-115 carrier aggregation system, 10-bit information needs to be fed back after using the combination method of Rel-10, which will seriously affect the transmission performance of the uplink PUCCH, and the last downlink dynamic scheduling signal sent by the network side within the feedback window Whether the signaling is lost or not, there is no judging scheme in the prior art, so the prior art cannot effectively judge the loss of the downlink dynamic scheduling signaling

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