SBFD Band Direction Control for Semi-Static Duplex Scheduling
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Solution Overview
Problem
Existing methods for indicating resource allocation in radio communication, particularly in subband non-overlapping full duplex (SBFD), fail to adequately enable or disable semi-static transmission and reception, leading to inefficiencies in scheduling and resource utilization.
Innovation Solution
A method for enabling and disabling semi-static transmission and reception in SBFD by configuring a transmission direction for each band, using a combination of semi-static and dynamic signaling, including the use of Slot Format Indicators (SFI) and group-common PDCCH to indicate the state of semi-static transmission and reception, allowing flexible symbol configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods for indicating resource allocation are used in SBFD, then the basic transmission function is maintained, but the ability to accurately control and indicate semi-static transmission and reception is insufficient
Solution Approach 1:
The frequency band is divided into multiple bands, and semi-static transmission and reception are controlled independently for each band. This segmentation allows precise control of transmission characteristics in different frequency regions without affecting the entire system, resolving the contradiction between accurate control and system complexity.
Solution Approach 2:
The patent introduces dynamic indication of semi-static transmission and reception states through Downlink Control Information (DCI). The transmission direction (downlink, uplink, or flexible) can be dynamically changed based on actual communication needs, enabling flexible adaptation while maintaining clear control mechanisms.
2Productivity
If semi-static transmission and reception are enabled in SBFD, then resource utilization is improved, but scheduling flexibility is reduced due to rigid configuration requirements
Solution Approach 1:
The patent combines semi-static configuration with dynamic indication through DCI. While the basic transmission direction is configured semi-statically, the system can dynamically adjust the transmission direction for specific bands or time periods, achieving both efficient resource utilization and flexible scheduling adaptation.
Solution Approach 2:
The patent allows changing the transmission direction parameter (downlink, uplink, flexible) dynamically based on communication conditions. This parameter flexibility enables the system to adapt to varying traffic patterns while maintaining the benefits of semi-static configuration for resource efficiency.
3Adaptability or versatility
If flexible symbol configurations are implemented, then scheduling adaptability is improved, but the complexity of controlling transmission directions increases
Solution Approach 1:
The frequency band is segmented into multiple bands, and transmission direction control is applied independently to each band. This segmentation simplifies the control mechanism by allowing granular adjustments in specific bands without requiring complex coordination across the entire frequency spectrum.
Solution Approach 2:
The patent uses Downlink Control Information (DCI) as an intermediary mechanism to convey transmission direction instructions from the base station to the terminal. This standardized control interface simplifies the complexity of coordinating flexible symbol configurations across multiple bands by providing a unified control language.
Data Source
AI summary
This terminal comprises: a control circuit that individually assesses, for a plurality of bands obtained by dividing a frequency band, activation and deactivation of quasistatic transmission and reception in a scheme in which a transmission direction is set for each of the plurality of bands; and a communication circuit that transmits or receives a signal in accordance with the assessment of the activation and deactivation.