Uplink Power Control via Dynamic HARQ Reference Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE and LTE-A, face challenges in efficiently managing uplink-downlink interference and adapting traffic dynamically due to static resource configurations, which limits flexibility and efficiency in frequency band utilization.
Innovation Solution
A method for uplink transmit power control that dynamically adjusts power settings based on subframe sets, allowing for flexible resource allocation between uplink and downlink channels by applying transmit power control information only to specific subframes, and using different power control schemes for static and flexible subframe sets to optimize interference management and traffic adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If static resource configurations are used in LTE systems, then system simplicity and ease of operation are maintained, but flexibility and efficiency in frequency band utilization deteriorate
Solution Approach 1:
The patent implements dynamic TDD configuration that allows the base station to switch between different uplink-downlink subframe configurations based on real-time traffic conditions. The system can dynamically adjust which subframes are allocated to uplink or downlink, transforming the static resource allocation into a dynamic system that adapts to changing traffic patterns while maintaining operational simplicity through automated control.
2Ease of operation
If uniform power control is applied to all uplink subframes, then device complexity is reduced and ease of operation is improved, but interference management performance deteriorates in varying interference environments
Solution Approach 1:
The patent applies different power control parameters specifically to flexible uplink subframes compared to static uplink subframes. By identifying which subframes belong to the flexible set and applying localized power control adjustments only to those subframes, the system improves interference management in dynamic configurations without unnecessarily complicating the overall power control mechanism.
3Adaptability or versatility
If dynamic TDD configuration switching is implemented, then adaptability to traffic patterns is improved, but device complexity and signal processing requirements increase
Solution Approach 1:
The patent divides uplink subframes into two distinct sets: static uplink subframes with fixed power control parameters and flexible uplink subframes with dynamic power control parameters. This segmentation allows the system to implement dynamic TDD configuration while maintaining simple, predetermined power control settings for the majority of subframes, thereby reducing the overall complexity of configuration management.
4Reliability
If transmit power control information is applied to all subframes, then uplink transmission reliability is improved, but efficiency in interference-heavy subframes deteriorates due to unnecessary power adjustments
Solution Approach 1:
The patent extracts transmit power control information application from the universal subframe level and applies it selectively only to flexible uplink subframes. By removing the unnecessary power control adjustments from static uplink subframes where they provide no benefit, the system maintains reliable transmission in dynamic subframes while improving overall power control efficiency and reducing unnecessary power adjustments.
Data Source
AI summary
A method for performing uplink power control by a user equipment, the method includes receiving downlink, DL, hybrid automatic repeat and request, HARQ configuration information indicating a uplink-downlink, UL-DL, configuration used as a DL HARQ reference configuration; receiving downlink control information, DCI, containing transmit power control, TPC, information; determining transmit power of a physical uplink control channel, PUCCH, carrying ACK/NACK information for a physical downlink shared channel, PDSCH, based on the TPC information; and transmitting the PUCCH with the transmit power of the PUCCH, wherein the transmit power of the PUCCH is determined based on the TPC information according to the DL HARQ reference configuration.