PUCCH Resource Selection Under Channel Access Constraints
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in transmitting and receiving wireless signals, particularly in unlicensed bands, due to challenges in channel access procedures and resource allocation for uplink control information.
Innovation Solution
A method and apparatus for efficiently transmitting uplink control information by user equipment (UE) in a wireless communication system, involving receiving indication information for PUCCH resource sets, performing a channel access procedure on candidate PUCCH resources, and transmitting uplink control information through a successfully accessed PUCCH resource, with specific operations determined by resource indication and start CCE index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel access procedure is performed on multiple candidate PUCCH resources in unlicensed bands, then reliability of uplink control information transmission is improved, but device complexity and processing time increase
Solution Approach 1:
The patent performs channel access procedures on multiple candidate PUCCH resources in advance before actual data transmission is needed. By pre-accessing multiple resources and identifying which ones are successfully accessed, the system ensures that when uplink control information needs to be transmitted, there are already known good resources available, thus improving reliability without adding complexity at the moment of transmission.
Solution Approach 2:
The patent divides the uplink control information transmission process into multiple independent candidate PUCCH resources. Instead of using a single resource, the system segments the transmission opportunities into multiple candidates, each subjected to separate channel access procedures. This segmentation allows the system to spread risk and improve overall transmission reliability through diversity.
2Reliability
If channel access procedure is performed on multiple candidate PUCCH resources in unlicensed bands, then reliability of uplink control information transmission is improved, but transmission delay increases
Solution Approach 1:
The patent performs channel access procedures on multiple candidate PUCCH resources in advance before actual data transmission is needed. By pre-accessing multiple resources and identifying which ones are successfully accessed, the system ensures that when uplink control information needs to be transmitted, there are already known good resources available, thus improving reliability without adding complexity at the moment of transmission.
3Adaptability or versatility
If multiple candidate PUCCH resources are configured, then adaptability of resource allocation is improved, but system complexity increases
Solution Approach 1:
The patent divides the uplink control information transmission process into multiple independent candidate PUCCH resources. Instead of using a single resource, the system segments the transmission opportunities into multiple candidates, each subjected to separate channel access procedures. This segmentation allows the system to spread risk and improve overall transmission reliability through diversity.
Solution Approach 2:
The patent employs implicit indexing mechanisms where the start symbol and resource selection are automatically determined based on PDCCH reception parameters without requiring explicit signaling. The system self-configures the PUCCH resources based on the received PDCCH information, reducing the need for complex external configuration and management.
Data Source
AI summary
The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for same, the method comprising the steps of: receiving indication information related to a PUCCH resource set of a specific PUCCH format via system information; receiving, on one or more CCEs, a PDCCH including resource indication information; for transmitting uplink control information, performing CAP with regard to a plurality of candidate PUCCH resources; and transmitting the uplink control information via a specific candidate PUCCH resource for which the CAP succeeded among the plurality of candidate PUCCH resources.