Transmission Direction Signaling for Full-Duplex Sub-Band Scheduling
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Solution Overview
Problem
Existing wireless communication technologies lack a method to explicitly indicate resource allocation for uplink data transmission in downlink slots during full duplex transmission, leading to challenges in determining transmission directions and potential interference.
Innovation Solution
An access network device sends configuration information to a terminal to determine transmission directions on sub-bands, using indicators like 'U' for uplink, 'D' for downlink, and 'F' for uncertain directions, allowing the terminal to adjust its transmission based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex transmission is implemented with sub-band scheduling, then throughput and uplink coverage are improved, but transmission direction determination becomes ambiguous and interference increases
Solution Approach 1:
The frequency band is divided into multiple sub-bands, and each sub-band is independently configured with transmission direction indicators (U/D/F). This segmentation allows precise control of transmission directions in different frequency regions, resolving the ambiguity in full duplex transmission while maintaining high throughput through frequency selective scheduling.
Solution Approach 2:
Configuration information including direction indicators (U/D/F) is introduced as an intermediary mechanism between the access network device and terminal. This intermediary explicitly indicates the transmission direction for each sub-band, enabling the terminal to accurately determine transmission directions and avoid interference in full duplex scenarios.
2Reliability
If configuration information is sent to indicate transmission directions, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
Instead of providing a single complex transmission direction indication for the entire bandwidth, the system uses localized direction indicators (U/D/F) for each sub-band. This local quality approach simplifies the configuration information structure while enabling precise transmission direction control, reducing processing complexity compared to global configuration methods.
Data Source
AI summary
Provided in embodiments of the present disclosure is a transmission direction determination method. The method is executed by an access network device. The method comprises: sending configuration information of at least one sub-band to a terminal, wherein the configuration information is used for the terminal to determine: the transmission direction of transmitting data on a target transmission unit on the basis of the sub-band.