UE-Specific Guard Period Configuration for TDD Interference
Solution Overview
Problem
In time division duplex (TDD) systems, the configuration of the guard period (GP) is static and does not adapt to individual terminal devices, leading to inefficient resource allocation and interference between uplink and downlink signals, particularly in new radio (NR) systems where flexible resource configuration is needed.
Innovation Solution
A method for UE-level semi-static or dynamic configuration of the GP and flexible uplink-downlink resource allocation, where the access network device determines the required GP resource for terminal devices based on factors like uplink timing advance measurement and maximum coverage distance, and sends specific time domain resource configuration information to ensure uplink synchronization and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cell-level static configuration of GP is used, then configuration simplicity is maintained, but resource allocation efficiency deteriorates and interference between uplink and downlink signals increases
Solution Approach 1:
The patent segments the cell-level GP configuration into two parts: a cell-level common GP configuration and a UE-specific GP configuration. The cell-level configuration provides the basic guard period resources, while the UE-specific configuration (via RRC signaling or DCI) allows individual terminals to receive additional or adjusted GP resources based on their specific needs, such as timing advance values or interference conditions. This segmentation enables both simplicity at the cell level and efficiency at the UE level.
Solution Approach 2:
The patent applies local quality by allowing different GP configuration parameters (such as guard period length or guard period position) to be customized for different terminals based on their local conditions. For example, terminals with larger timing advance values or those experiencing specific interference patterns can be allocated different GP resources than terminals with smaller timing advance values, optimizing resource allocation for each local situation while maintaining overall system simplicity.
2Device complexity
If cell-level static configuration of GP is used, then configuration simplicity is maintained, but interference between uplink and downlink signals increases
Solution Approach 1:
The patent segments the cell-level GP configuration into two parts: a cell-level common GP configuration and a UE-specific GP configuration. The cell-level configuration provides the basic guard period resources, while the UE-specific configuration (via RRC signaling or DCI) allows individual terminals to receive additional or adjusted GP resources based on their specific needs, such as timing advance values or interference conditions. This segmentation enables both simplicity at the cell level and efficiency at the UE level.
Solution Approach 2:
The patent applies local quality by allowing different GP configuration parameters (such as guard period length or guard period position) to be customized for different terminals based on their local conditions. For example, terminals with larger timing advance values or those experiencing specific interference patterns can be allocated different GP resources than terminals with smaller timing advance values, optimizing resource allocation for each local situation while maintaining overall system simplicity.
3Productivity
If UE-level dynamic configuration of GP is implemented, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the GP configuration into cell-level common parameters (configured via system information) and UE-specific parameters (configured via RRC signaling or DCI). The cell-level configuration establishes the basic framework with minimal complexity, while the UE-specific configuration adds dynamic optimization only where needed. This segmentation allows the system to achieve high resource allocation efficiency without requiring complete dynamic reconfiguration of all parameters for all terminals.
Solution Approach 2:
The patent implements partial dynamic configuration by applying UE-specific GP configuration only to terminals that require it (e.g., those with specific timing advance values or interference conditions), rather than dynamically configuring all terminals. This partial action approach achieves the necessary resource allocation efficiency while avoiding the excessive complexity that would result from universal dynamic configuration.
Data Source
AI summary
The present disclosure relates to time domain resource configuration methods and access network devices One example method includes determining a guard period (GP) resource required by a terminal device, where the GP resource required by the terminal device is a GP resource required by the terminal device for uplink synchronization with an access network device, and sending first time domain resource configuration information to the terminal device, where the first time domain resource configuration information indicates the GP resource required by the terminal device.