Flexible TDD Frame Segmentation for Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals using Time Division Duplex (TDD) due to interference issues and limited flexibility in frequency band usage, particularly in supporting user-specific data asymmetry and managing self-interference.
Innovation Solution
The implementation of Fully Flexible user-specific Time Division Duplex (F2< user-specific TDD) in wireless communication systems, where radio frames include both UE-common and UE-specific time resource intervals for data transmission and interference measurement, allowing for dynamic scheduling and resource configuration to minimize interference and maximize frequency efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single TDD configuration is used for all users, then system simplicity is maintained, but user-specific data asymmetry cannot be supported
Solution Approach 1:
The patent segments the radio frame into UE-common time resource intervals and UE-specific time resource intervals. This segmentation allows different TDD configurations to be applied to different user groups or individual users, enabling user-specific data asymmetry support while maintaining a structured framework that prevents excessive complexity.
Solution Approach 2:
The patent introduces dynamic TDD configuration where the TDD pattern can be changed flexibly per user or user group based on traffic conditions. This dynamic approach allows the system to adapt to varying data asymmetry requirements without requiring completely separate static configurations for each scenario.
2Productivity
If data transmission and interference measurement are performed simultaneously in the same time resource, then resource utilization is maximized, but self-interference and multi-user interference increase
Solution Approach 1:
The patent segments time resources into distinct intervals: UE-common time resource intervals dedicated for interference measurement and UE-specific time resource intervals for data transmission. This temporal segmentation separates harmful interference measurement from data transmission, preventing self-interference and multi-user interference while maintaining efficient resource utilization through dedicated measurement periods.
Solution Approach 2:
The patent introduces UE-common time resource intervals as intermediary measurement periods that facilitate interference measurement without directly interfering with data transmission. These common intervals act as mediators that allow the system to characterize interference conditions separately from user data transmissions, enabling better interference management.
3Productivity
If flexible user-specific TDD configuration is implemented, then frequency use efficiency is enhanced, but system complexity and scheduling overhead increase
Solution Approach 1:
The patent implements a hierarchical configuration framework where UE-common time resource intervals serve multiple purposes: they are used for interference measurement by all users, for system information transmission, and as reference points for UE-specific configurations. This multi-functionality reduces overall system complexity by having common elements that serve multiple users and purposes, while still allowing flexible user-specific optimizations.
Solution Approach 2:
The patent enables flexible adjustment of TDD configuration parameters such as the number and position of UE-specific time resource intervals, the ratio of uplink to downlink resources, and the periodicity of configurations. These parameter changes allow the system to optimize frequency use efficiency for different traffic conditions and user requirements without requiring complete reconfiguration of the entire system architecture.
Data Source
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AI summary
Abstract: Disclosed in the present application is a method for transreceiving signals between a base station and user equipment in wireless communication system. Specifically, the method comprises a step of transreceiving the signals with the base station, in units of a wireless frame comprising at least one user equipment-shared time resource interval and at least one user equipment-specific time resource interval , wherein the at least one user equipment-specific time resource interval is a time resource interval for transreceiving data between the base station and the user equipment, and wherein the at least one user equipment-shared time resource interval is a time resource interval for transreceiving signals for measuring interference.