UE-Flexible TDD Mode for Full Duplex Base Stations
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively managing self-interference in full duplex radio (FDR) networks, particularly in intra-device self-interference, which hinders efficient communication.
Innovation Solution
A method for user equipment (UE) to operate in UE-flexible Time Division Duplex (TDD) mode, where the base station operates in full duplex mode and the UE in half duplex mode, involving the reception of information associated with UE-flexible TDD mode support cells through primary and secondary cells, and the decoding of symbols within specific subframes to mitigate self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station operates in full duplex mode to increase communication capacity, then the cell throughput is improved, but self-interference occurs between transmission and reception signals
Solution Approach 1:
The patent divides the communication system into two operational modes: the base station operates in full duplex mode (simultaneous transmission and reception) while the user equipment operates in half duplex mode (sequential transmission and reception). This segmentation allows the network to achieve full duplex throughput while avoiding self-interference at the UE level, as the UE alternates between transmitting and receiving rather than doing both simultaneously.
Solution Approach 2:
The patent applies different operational characteristics to different components of the system. The base station is configured with full duplex capability for high throughput, while the user equipment is configured with half duplex operation to avoid self-interference. This local differentiation of operational modes allows each component to operate optimally for its specific requirements while achieving overall system performance.
2Productivity
If the user equipment operates in full duplex mode to match base station capacity, then the communication efficiency is improved, but intra-device self-interference occurs at the UE
Solution Approach 1:
The patent segments the duplex operation between network infrastructure and user equipment. The base station handles full duplex operation to maintain high communication efficiency and capacity, while the user equipment operates in half duplex mode to avoid intra-device self-interference. This segmentation allows the system to achieve high efficiency without requiring every device to operate in full duplex mode.
Solution Approach 2:
The base station acts as an intermediary that manages the duplex operation for the entire system. By centralizing full duplex capability at the base station and having UEs operate in half duplex mode, the base station mediates between the need for high communication efficiency and the need to avoid self-interference at the UE level, coordinating transmission and reception timing across the network.
3Reliability
If traditional TDD mode is used to avoid self-interference, then the UE operates reliably, but the cell throughput is limited by half duplex operation
Solution Approach 1:
The patent segments the duplex operation between base station and user equipment, allowing the UE to maintain reliable half duplex operation while the base station provides full duplex capability. This segmentation enables the system to achieve both reliability at the UE level and high throughput at the cell level simultaneously, overcoming the limitation of traditional TDD mode where both ends must operate in the same duplex mode.
Solution Approach 2:
The patent introduces dynamic operational modes where the base station can adaptively switch between full duplex and half duplex operation based on traffic conditions and UE capabilities. This dynamic approach allows the system to maintain UE reliability through half duplex operation when needed while achieving high cell throughput through full duplex operation when conditions permit, making the system flexible rather than fixed in its duplex mode.
Data Source
AI summary
A method for performing communication by a user equipment (UE) in a UE-flexible Time Division Duplex (TDD) mode in a network configured to support the UE-flexible TDD mode in which a base station (BS) operates in a full duplex mode and the UE operates in a half duplex mode includes receiving information associated with a UE-flexible TDD mode support cell configured to support the UE-flexible TDD mode through a primary cell (PCell) from the base station (BS); and receiving a physical downlink shared channel (PDSCH) from the base station (BS) through the UE-flexible TDD mode support cell based on the information.


