Transmission method of uplink control signaling and terminal

Abstract

The invention discloses a transmission method of uplink control signaling and a terminal, a base station, relating to the digital communication field. The transmission method of the uplink control signaling comprises the step: in a time division duplex (TDD) system, the terminal maps ACK / NACK (Acknowledgement / Negative Acknowledgement) response messages as M bit information according to the right / wrong ACK / NACK response messages of the to-be-fed back N physical downlink shared channels (PDSCH) and other uplink control information, and the mapping relationship, wherein the M bit information and the other uplink control information are sent on the physical downlink shared channel which is in convention with the base station, wherein the mode of the ACK / NACK response message fed back by the terminal is the channel selection mode. By using the transmission method of the uplink control signaling and the terminal provided by the invention, the problems of simultaneously sending the response messages, scheduling requests, channel state information of a plurality of download component carriers can be effectively solved, and the performance of the system can be ensured.

Description

A transmission method and terminal for uplink control signaling technical field The invention relates to the field of digital communication, in particular to a terminal, a base station and a transmission technology of uplink control signaling in a multi-carrier system with a large bandwidth. Background technique 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) technology has become a research hotspot in the communication field. In the downlink HARQ of the long-term evolution system (LTE: LongTermEvolution), the ACK / NACK (ACK / NACK: Acknowledgment / NegativeAcknowledgment) response message of the physical downlink ...

AI Technical Summary

Problems solved by technology

For UE configured to use channel selection to feed back ACK / NACK, if the current subframe also sends SR or CSI at the same time, if the TDD method in LTE is used, we can see from Table 1 that when the base station receives b (0), b(1)=(1, 1), the base station will not be able to judge whether the UE has correctly received 1 or 4 PDSCH

Therefore, from the perspective of system robustness, the base station will assume that only one PDSCH is received. Therefore, for the scenario where the UE correctly receives 4 PDSCHs, the base station will also retransmit, so the system throughput performance will decrease.

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