PUCCH Resource Allocation via Index Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation mobile communication systems, there is a challenge in properly allocating PUCCH resources for user terminals to transmit uplink control information, especially before and after RRC connection is set up, leading to potential allocation failures.
Innovation Solution
A method where a radio base station receives uplink control information and transmits system information with index values indicating PUCCH resources, allowing user terminals to select resources based on bit values in DCI and implicit values, thereby controlling the number of PUCCH resources and reducing design and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUCCH resources are allocated based on bit values in DCI and implicit values before RRC connection setup, then resource allocation flexibility is improved, but allocation reliability deteriorates
Solution Approach 1:
The base station pre-configures multiple PUCCH resource sets with different numbers of resources and transmits index information indicating which set to use. This preliminary configuration enables flexible resource allocation while ensuring reliable allocation through pre-planned resource pools, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
An index value transmitted in system information acts as an intermediary between the base station's resource configuration and the user terminal's resource selection. This index mediates the allocation process, allowing flexible adaptation to different scenarios while maintaining reliable allocation through centralized control.
2Adaptability or versatility
If multiple PUCCH resources are configured for different scenarios, then allocation adaptability is improved, but device complexity increases
Solution Approach 1:
PUCCH resources are segmented into multiple resource sets, each configured with a specific number of resources suitable for different scenarios (e.g., different numbers of downlink component carriers). The base station transmits an index indicating which set to use, enabling adaptability without requiring the terminal to manage all configurations simultaneously, thus reducing complexity.
Solution Approach 2:
The PUCCH resource configuration mechanism is designed to be universal, supporting multiple scenarios through a single unified framework. The base station can indicate different resource sets using the same indexing mechanism, allowing the system to handle various situations (different carrier numbers, transmission scenarios) without requiring separate complex configuration procedures for each case.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In accordance with one aspect of the present invention, a user terminal has a transmission section that transmits uplink control information by using an uplink control channel, a receiving section that receives system information, including an index value that is set from among a plurality of index values that at least indicate different numbers of resources for the uplink control channel, and a control section that selects, from among one or more resources indicated by the index value included in the system information, a resource for transmitting the uplink control information, based on at least one of a bit value when downlink control information and an implicit value.