Physical uplink control channel (PUCCH) resource allocation method

Abstract

The invention discloses a physical uplink control channel (PUCCH) resource allocation method. The PUCCH resource quantity is flexibly allocated to each uplink sub-frame according to uplink and downlink time slot allocations and the characteristics of each sub-frame, and a selection method of aggregation levels is specified to ensure that UE (User Equipment) can meet a CCE (Control Channel Element) requirement corresponding to the PUCCH resource quantity as much as possible, and the PUCCH resource quantity is decreased. Meanwhile, through cooperation of uplink and downlink resource scheduling, all ACK (Acknowledgements) / NACK (Negative-Acknowledgements) transmitted in a downlink way can be fed back by corresponding uplink resources.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a method for allocating physical uplink control channel resources. Background technique [0002] In a wireless communication system, for accurate and efficient communication between a base station and a user equipment (UE), the UE needs to feed back uplink control information (Uplink Control Information, UCI) to the base station. Uplink control information includes: Scheduling Request Indicator (SR); Acknowledgment / Negative-Acknowledgment (ACK / NACK); Channel Quality Indicator (CQI), Rank Indicator (Rank Indicator, RI ) and Precoding Matrix Indicator (PrecodingMatrix Indicator, PMI). Among them, SR is used for the UE to request uplink resources from the base station, ACK / NACK is used for the UE to indicate to the base station whether the downlink data is received correctly, and information such as CQI is used for the UE to indicate the measured downlink...

AI Technical Summary

Problems solved by technology

[0011] In Solution 1, the number of PUCCH resources is determined by the pre-configured CQI / RI / PMI and SR periods, and the maximum CCE index corresponding to the number of PDCCH symbols in the downlink transmission subframe, which is inflexible and a large number of resources are reserved for PUCCH Uplink resources, and the ACK / NACK feedback of each user is scattered on all PRBs of the PUCCH, and the PUCCH resources are not fully utilized, resulting in a large waste of uplink resources;

[0012] In the second solution, a certain amount of resources is reserved in a semi-static manner, and adjusted according to the usage efficiency after a period of time, which cannot flexibly adapt to changes in user and service requirements in the system. If a large number of resources are reserved, PUCCH resources will be wasted , less reservation will cause the ACK / NACK reporting position of some users to conflict with the PUSCH resource, or the problem that some users cannot be scheduled

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