Wireless Communication Full-Duplex Operation with TDD Direction Overrides
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting full duplex operation due to a lack of flexible resources, leading to reduced resource usage efficiency and system throughput, particularly in environments where TDD configurations are fixed.
Innovation Solution
A method for a device in a wireless communication system that involves receiving an FD configuration message and overriding first direction information with second direction information for full duplex symbols, allowing enhanced UEs to support full duplex operation even in environments with limited flexible resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDD configurations are fixedly used in deployed base stations or UEs, then existing UE compatibility is maintained, but full duplex operation cannot be supported due to lack of flexible resources
Solution Approach 1:
The patent applies dynamics by enabling the UE to dynamically determine the direction (downlink or uplink) of time resources based on FD configuration messages received from the base station. Instead of being fixed to a predetermined TDD pattern, the UE can adapt its behavior in real-time to support full duplex operation when needed, while maintaining compatibility with existing fixed TDD configurations when FD mode is not activated.
Solution Approach 2:
The patent changes the parameter of time resource directionality from fixed to variable. By introducing FD configuration messages that can indicate different directions for the same time resource, the system allows parameter changes in the TDD configuration based on operational mode. This enables full duplex support when FD mode is active while falling back to conventional TDD behavior when not active.
2Adaptability or versatility
If flexible resources are increased to support full duplex operation, then full duplex capability is enabled, but system complexity increases due to additional configuration requirements
Solution Approach 1:
The patent applies universality by designing the FD configuration message to serve multiple purposes: it can indicate full duplex operation mode, specify time resources for full duplex, and define directionality for those resources. This multi-functional approach avoids the need for separate, dedicated configuration messages for each parameter, thereby reducing overall system complexity while enabling full duplex capability.
Solution Approach 2:
The base station performs preliminary action by sending FD configuration messages in advance to configure the UE for full duplex operation. This allows the UE to prepare its internal state, antenna switching, and resource allocation before actual full duplex transmission begins, simplifying the real-time operation and reducing the complexity of dynamic reconfiguration during data transmission.
3Productivity
If flexible resources are used for full duplex operation, then resource usage efficiency increases, but compatibility with existing UEs using fixed TDD configurations decreases
Solution Approach 1:
The patent ensures compatibility through dynamics by allowing the system to adapt its behavior based on operational mode. When full duplex is not active, the system operates in conventional TDD mode compatible with existing UEs. When full duplex is activated via FD configuration messages, the system transitions to the enhanced mode. This dynamic switching maintains backward compatibility while enabling forward compatibility with full duplex-capable UEs.
Data Source
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AI summary
Provided are an apparatus and method for operation of an apparatus in a wireless communication system. The apparatus may be a UE, a chipset, or a base station. The UE receives an FD configuration message notifying a full duplex symbol from among a plurality of symbols, receives a cell-specific common TDD configuration message, and receives a UE-specific dedicated TDD configuration message. Here, only for the full duplex symbol from among the plurality of symbols, second direction information notified by the dedicated TDD configuration message overrides first direction information notified by the common TDD configuration message.