Cell-Specific TDD Reconfiguration for Low-Latency Full Duplex
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Solution Overview
Problem
Existing wireless communication systems face limitations in efficiently managing dynamically changing traffic loads with low latency requirements for services like extended reality and self-driving cars, due to semi-static or dynamic TDD UL/DL configurations and inefficient frequency resource utilization in FDD schemes.
Innovation Solution
A method and device for performing resource configuration in wireless communication systems by receiving a new cell-specific TDD configuration, determining UE capability, and selecting a TDD configuration for full duplex operation based on UE capability, allowing simultaneous DL and UL transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing semi-static or dynamic TDD UL/DL configuration is used, then transmission time delay increases, but full duplex operation cannot be implemented
Solution Approach 1:
The patent implements dynamic TDD-UL-DL configuration that can adaptively switch between half-duplex and full-duplex modes based on traffic conditions and UE capability. The base station configures different TDD patterns dynamically, allowing the system to transition from static configuration to dynamic reconfigurable configuration, enabling full duplex operation when conditions permit while maintaining backward compatibility.
Solution Approach 2:
The patent changes the operational parameters by introducing a new TDD configuration parameter set that supports full duplex operation. The base station transmits configuration information indicating whether full duplex is supported, and UEs adjust their transmission/reception parameters accordingly. This parameter change enables the system to operate in full duplex mode (simultaneous DL and UL) when capabilities align, reducing transmission delay.
2Object-affected harmful factors
If existing TDD configuration is used, then interference between operators occurs, but resource utilization efficiency is maintained
Solution Approach 1:
The patent segments the frequency resource utilization by introducing cell-specific TDD configuration that can differ from the common configuration. Different cells can be segmented into different operational modes (half-duplex or full-duplex) with customized TDD patterns, allowing operator-specific optimization while reducing inter-operator interference through differentiated resource allocation.
Solution Approach 2:
The patent applies local quality by allowing individual cells to have customized TDD configurations based on local traffic conditions and operator requirements. The base station can configure specific cells for full duplex operation while other cells maintain half-duplex, creating local optimization zones that reduce interference while maximizing overall system efficiency.
3Productivity
If FDD scheme is used, then frequency resource utilization for DL/UL direction is improved, but efficiency for dynamically changing traffic is reduced
Solution Approach 1:
The patent transitions from static FDD to dynamic TDD by enabling flexible reconfiguration of DL/UL time slots based on real-time traffic conditions. The base station can dynamically adjust the number and position of DL and UL slots within a frame structure, allowing the system to adapt to dynamically changing traffic loads while maintaining efficient frequency resource utilization through configurable resource allocation.
Data Source
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AI summary
A method of operating a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving, from a base station, a new cell specific time division duplex (TDD) configuration along with an existing TDD configuration; determining a UE capability for interpreting the new cell specific TDD configuration; selecting one TDD configuration of the existing TDD configuration and the new cell specific TDD configuration based on the UE capability; and performing a full duplex (FD) operation based on the selected TDD configuration.