Uplink Control Channel Resource Selection for LTE-A Carrier Aggregation
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Solution Overview
Problem
In LTE-A carrier aggregation systems, the simultaneous transmission of periodic CSI and HARQ-ACK information leads to high resource overhead and low resource utilization due to the occupation of reserved PUCCH resources, even when not all information needs to be transmitted simultaneously.
Innovation Solution
A method where a user equipment dynamically selects a physical uplink control channel resource from semi-statically configured resource groups based on indication information from the base station, choosing between resource groups with different capacities to transmit uplink control information efficiently, thereby reducing resource overhead and improving utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a PUCCH resource of format 3 is reserved semi-statically for simultaneous transmission of periodic CSI and HARQ-ACK, then the user equipment can transmit both types of information, but the resource overhead increases and resource utilization decreases because the resource is occupied even when not all information needs to be transmitted simultaneously
Solution Approach 1:
The patent applies dynamics by enabling the user equipment to dynamically select between different PUCCH resource groups (first resource group for HARQ-ACK only, second resource group for both HARQ-ACK and periodic CSI) based on the actual transmission needs. This dynamic selection mechanism allows the system to adapt the resource usage to the actual information requirements, avoiding the waste of reserving a fixed high-capacity resource when it is not fully utilized.
Solution Approach 2:
The patent changes the parameter of resource capacity by providing two distinct resource groups with different capacities. The first resource group has capacity for HARQ-ACK only, while the second resource group has capacity for both HARQ-ACK and periodic CSI. The user equipment selects the appropriate resource group based on the actual transmission requirements, thereby optimizing resource overhead while maintaining the capability to transmit both information types when needed.
2Adaptability or versatility
If a PUCCH resource of format 3 is reserved semi-statically for simultaneous transmission of periodic CSI and HARQ-ACK, then the user equipment can transmit both types of information, but resource utilization decreases
Solution Approach 1:
The patent improves resource utilization by introducing dynamic selection between resource groups. Instead of a static reservation that occupies resources regardless of actual needs, the system dynamically chooses the appropriate resource group size based on whether periodic CSI transmission is required, thereby increasing overall resource utilization efficiency.
Solution Approach 2:
By providing resource groups with different capacity parameters and allowing dynamic selection based on actual transmission needs, the patent optimizes resource utilization. The system adjusts the effective resource capacity parameter to match the actual information volume, preventing resource waste and improving overall productivity.
3Adaptability or versatility
If the user equipment uses a PUCCH of format 3 to transmit both periodic CSI and HARQ-ACK, then both information types can be transmitted, but the resource overhead is high due to the large capacity of format 3 resources
Solution Approach 1:
The patent segments the PUCCH resources into two distinct resource groups: a first resource group with smaller capacity for HARQ-ACK only, and a second resource group with larger capacity for both HARQ-ACK and periodic CSI. This segmentation allows the system to use the minimal necessary resource capacity for each transmission scenario, reducing overall resource overhead while maintaining full adaptability.
Solution Approach 2:
The patent changes the resource capacity parameter by providing two options: a smaller capacity resource group for HARQ-ACK only and a larger capacity resource group for combined transmission. The user equipment selects the appropriate parameter (resource group) based on actual needs, thereby minimizing resource overhead while maintaining the capability to transmit both information types when required.
Data Source
AI summary
The present application discloses a method for transmitting uplink control information, a user equipment, and a base station. The method includes: receiving a physical downlink control channel sent by a base station, where the physical downlink control channel includes indication information, where the indication information is used to indicate a physical uplink control channel resource used to transmit uplink control information; obtaining, according to the indication information and whether the uplink control information includes periodic channel state information, a physical uplink control channel resource used to transmit the uplink control information from a semi-statically configured first resource group and/or second resource group; and sending the uplink control information to the base station over a physical uplink control channel corresponding to the physical uplink control channel resource.