Dynamic UL-DL Configuration for Wireless Control Information
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting control information, particularly in managing uplink and downlink configurations, which affects the reliability and efficiency of control data exchange between terminals and base stations, especially in scenarios involving carrier aggregation and different UL-DL configurations.
Innovation Solution
A method and apparatus for transmitting control information that dynamically adjust uplink and downlink configurations based on Hybrid Automatic Repeat Request (HARQ) process periods and Almost Blank Subframe (ABS) patterns, allowing for flexible timing changes to align with System Frame Number (SFN) resets, ensuring efficient resource allocation and interference minimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed UL-DL configuration is used in wireless communication system, then system stability is maintained, but communication efficiency deteriorates due to inability to adapt to different HARQ process periods and ABS patterns
Solution Approach 1:
The patent implements dynamic UL-DL configuration that can be adjusted based on HARQ process periods and ABS patterns. The configuration is no longer fixed but can be changed adaptively to match varying system conditions, allowing the system to optimize communication efficiency for different scenarios while maintaining manageable complexity through standardized adjustment mechanisms.
2Adaptability or versatility
If UL-DL configuration is changed frequently to adapt to different scenarios, then adaptability is improved, but system stability deteriorates due to timing synchronization issues
Solution Approach 1:
The patent employs periodic configuration changes that are synchronized with HARQ process periods and ABS pattern periods. By making changes at regular, predictable intervals aligned with these periodic processes, the system achieves adaptability to different scenarios while maintaining timing synchronization stability through consistent, rhythm-based adjustments rather than arbitrary changes.
Solution Approach 2:
The system uses feedback mechanisms to monitor HARQ process timing and ABS patterns, then adjusts UL-DL configuration accordingly. This closed-loop approach ensures that configuration changes are made based on actual system conditions, improving adaptability while maintaining stability through condition-based rather than random adjustments.
3Productivity
If static resource allocation is used for control information transmission, then resource management is simplified, but transmission efficiency deteriorates due to mismatch with varying control data requirements
Solution Approach 1:
The patent changes resource allocation parameters dynamically based on control information requirements. Instead of static allocation, the system adjusts resource parameters such as time slots, frequency resources, and power levels to match the varying demands of different control data transmissions, thereby improving transmission efficiency while managing complexity through parameter-based flexibility.
Data Source
AI summary
A method and a terminal for transmitting control information to a base station in a wireless communication system. The method according to an embodiment includes receiving a Physical Downlink Control Channel (PDCCH) from the base station through at least one serving cell configured for the terminal; and setting an uplink-downlink (UL-DL) configuration for a reference unit to another UL-DL configuration after a predetermined time from when the PDCCH is received if the PDCCH indicates to set the UL-DL configuration for the at least one serving cell to the another UL-DL configuration. The indication of the PDCCH is transmitted with a predetermined period.