PUCCH Resource Allocation for Unicast and Multicast HARQ-ACK
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmission and reception, particularly in determining Physical Uplink Control Channel (PUCCH) resources for multiplexing Hybrid Automatic Repeat Request (HARQ)-ACK information during unicast and multicast transmissions, leading to resource allocation complexities.
Innovation Solution
The method involves receiving and transmitting HARQ-ACK information on a PUCCH based on unicast semi-persistent scheduling (SPS) and multicast downlink transmissions, where PUCCH resources are determined using information related to the unicast SPS downlink transmission, allowing for efficient multiplexing and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are allocated for unicast and multicast transmissions, then reliability of HARQ-ACK feedback is improved, but device complexity and resource allocation complexity increase
Solution Approach 1:
The patent combines unicast and multicast HARQ-ACK feedback into a single PUCCH resource allocation mechanism. The UE determines a single PUCCH resource based on the last received downlink transmission regardless of whether it is unicast or multicast, merging the resource allocation processes and reducing complexity while maintaining feedback reliability
Solution Approach 2:
The PUCCH resource determination method is made universal by applying the same resource selection rule (based on last received transmission) to both unicast and multicast transmissions. This multi-functional approach allows the system to handle different transmission types through a unified mechanism, reducing the need for separate resource management
2Reliability
If separate PUCCH resources are allocated for unicast and multicast transmissions, then reliability of HARQ-ACK feedback is improved, but resource allocation overhead increases
Solution Approach 1:
The patent merges the resource allocation overhead by using a single PUCCH resource determination rule for both unicast and multicast transmissions. Instead of maintaining separate resource allocation tables and procedures, the system uses one unified approach based on the timing of the last received transmission, thereby reducing the quantity of signaling and configuration overhead
3Productivity
If PUCCH resources are determined based on unicast SPS transmission information, then resource allocation efficiency is improved, but adaptability to multicast transmissions may be reduced
Solution Approach 1:
The patent makes the unicast-based PUCCH resource determination method universal by applying it to both unicast and multicast transmissions. The same rule (determining PUCCH resource based on the last received downlink transmission) serves multiple functions, maintaining efficiency while adapting to different transmission types through a single versatile mechanism
Data Source
AI summary
Disclosed are a method and device for performing uplink transmission and reception in a wireless communication system. The method by which a terminal performs an uplink transmission, according to an embodiment of the present disclosure, comprises the steps of: receiving a first downlink transmission and a second downlink transmission from a base station; and transmitting, to the base station, first HARQ-ACK information associated with the first downlink transmission and second HARQ-ACK information associated with the second downlink transmission, which have been multiplexed on a PUCCH, wherein, on the basis of the first downlink transmission being a unicast SPS downlink transmission and the second downlink transmission being a multicast downlink transmission being scheduled by first DCI, a resource for the PUCCH may be based on information related to the unicast SPS downlink transmission.