PUCCH Resource Allocation for Wireless Signal Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving control information, particularly in allocating PUCCH resources for HARQ ACK/NACK signals, which can lead to resource collisions and reduced availability for multiple users.
Innovation Solution
The proposed solution involves configuring multiple PUCCH resource sets based on UCI payload size and using explicit or implicit rules for resource allocation, with the eNB indicating specific PUCCH resources through DCI, allowing UEs to select appropriate resources and manage collisions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH resources are allocated to multiple users, then communication capacity for multiple users is improved, but resource collisions occur reducing transmission reliability
Solution Approach 1:
The PUCCH resources are segmented into multiple resource sets, where each set contains multiple PUCCH resources. The eNB configures multiple PUCCH resource sets and indicates specific resources through DCI, allowing different users to be assigned to different resource sets and avoiding collisions while maintaining high communication capacity
Solution Approach 2:
The PUCCH resource allocation is made dynamic through DCI indication. The eNB can dynamically indicate which PUCCH resource from the configured sets should be used by the UE, allowing flexible adaptation to current system conditions and user distribution, thereby preventing collisions while maximizing resource utilization
2Measurement precision
If explicit indication of PUCCH resources is used, then resource allocation precision is improved, but signaling overhead increases
Solution Approach 1:
PUCCH resources are divided into multiple sets configured by higher layers, with each set containing multiple resources. The DCI indicates a specific resource within the appropriate set, achieving precise allocation without requiring the DCI to specify every possible resource detail, thus reducing signaling overhead
Solution Approach 2:
Different PUCCH resource sets are configured with different properties (e.g., different starting PRBs, different lengths) to suit different UCI payload sizes and transmission conditions. The eNB selects and indicates the appropriate resource from the suitable set, providing precise allocation tailored to specific local requirements while maintaining efficient signaling
Data Source
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AI summary
A wireless communication system is disclosed. More particularly, disclosed herein are a method including receiving downlink scheduling information on a PDCCH, the downlink scheduling information comprising resource indication information (RI), selecting a first PUCCH resource set from among a plurality of PUCCH resource sets based on a size of the control information, and transmitting the control information using a PUCCH resource corresponding to the RI in the first PUCCH resource set, wherein, when a control information size supported by the first PUCCH resource set is less than or equal to X (>=1) bits, the PUCCH resource is determined using one of a first scheme and a second scheme, and wherein, when the control information size supported by the first PUCCH resource set is greater than X bits, the PUCCH resource is determined using only the second scheme, and an apparatus therefor.