UE Bandwidth Slot Switching for Half- and Full-Duplex Adaptation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing half-duplex and full-duplex bandwidth switching due to unpredictable self-interference, leading to inefficiencies in spectrum utilization and inaccurate reference signal measurements.
Innovation Solution
Implementing a method for switching between full and partial frequency bandwidth slots using a group common-physical downlink control channel (GC-PDCCH) for half-duplex and full-duplex bandwidth adaptation, with pre-determined patterns for downlink/uplink bandwidth switching to mitigate self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system operates in full-duplex mode with simultaneous uplink and downlink transmissions, then spectrum utilization is improved, but self-interference occurs leading to inaccurate reference signal measurements
Solution Approach 1:
The patent segments the frequency bandwidth into distinct uplink and downlink subbands, allowing simultaneous transmissions in separated frequency regions. This segmentation enables full-duplex operation while preventing self-interference by ensuring uplink and downlink signals occupy different frequency portions, thus maintaining measurement accuracy.
Solution Approach 2:
The patent applies local quality by configuring different bandwidth portions (subbands) for uplink and downlink transmissions within the same time slot. Specifically, the downlink bandwidth is configured to exclude the uplink subband region, creating localized frequency separation that eliminates self-interference while maintaining overall full-duplex operation.
2Adaptability or versatility
If the system dynamically switches between half-duplex and full-duplex modes, then adaptability is improved, but system complexity increases due to switching management
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple bandwidth parts (BWPs) with different bandwidth configurations before operation. The network device prepares both half-duplex and full-duplex bandwidth configurations in advance, allowing rapid switching without complex real-time calculations, thus reducing system complexity while maintaining high adaptability.
Solution Approach 2:
The patent enables dynamic switching between half-duplex and full-duplex modes by configuring multiple bandwidth parts that can be activated based on traffic conditions. The system dynamically selects appropriate bandwidth configurations through BWP switching, allowing adaptability to varying network conditions while using standardized switching mechanisms to control complexity.
3Use of energy by moving object
If the UE uses full bandwidth for both uplink and downlink in half-duplex mode, then power efficiency is improved, but latency increases when switching to full-duplex mode is required
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts including both full-bandwidth half-duplex configurations and partial-bandwidth full-duplex configurations. When full-duplex operation is needed, the system can rapidly switch to the pre-prepared BWP configuration, minimizing switching latency while maintaining power efficiency during half-duplex periods.
Solution Approach 2:
The patent implements dynamic bandwidth adaptation by allowing the UE to switch between different bandwidth configurations based on operational mode requirements. During half-duplex operation, the UE uses full bandwidth for power efficiency; when full-duplex is required, the system dynamically transitions to the appropriate partial-bandwidth configuration, optimizing both power consumption and response time.
Data Source
AI summary
A method of wireless communication by a user equipment (UE) includes receiving a configuration for switching between a full frequency bandwidth slot in a half duplex mode, and a partial frequency bandwidth slot in a subband based base station full duplex (SBFD) mode. The full frequency bandwidth slot is for uplink communications or downlink communications. The partial frequency bandwidth slot is for the uplink communications corresponding to an uplink subband or for downlink communications corresponding to at least one downlink subband. The method also includes switching, in accordance with the configuration, between the full frequency bandwidth slot and the partial frequency bandwidth slot.