Slot Format Determination for Sub-Band Full Duplex
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Solution Overview
Problem
User equipment (UE) needs to determine a slot format when the sub-band full duplex is applied at the base station side, as the simultaneous use of downlink and uplink is only at the base station side and not at the user equipment side.
Innovation Solution
A user equipment (UE) is configured to receive first configuration information indicating at least one frequency domain resource of at least one first sub-band within one band width part (BWP) of a first number of time units, and to determine one or more first transmission directions of the at least one first sub-band within the BWP for each time unit of the first number of time units based on the received configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-band full duplex is applied at base station side to extend uplink transmission duration, then uplink coverage and capacity are improved, but UE needs to determine complex slot format configurations
Solution Approach 1:
The patent segments the bandwidth into multiple sub-bands, where each sub-band can have independent transmission directions (uplink or downlink). This allows the base station to apply sub-band full duplex by configuring different sub-bands with different directions, thereby extending uplink transmission opportunities in specific frequency regions while maintaining downlink in others, thus improving uplink coverage and capacity without requiring the UE to handle entirely new complex configurations.
Solution Approach 2:
The patent applies local quality by allowing different transmission directions to be assigned to different sub-bands within the same time unit. Each sub-band can be independently configured with uplink or downlink direction based on local requirements, enabling the base station to optimize uplink performance in specific frequency regions while maintaining overall system flexibility.
2Measurement precision
If multiple configuration information are provided for different sub-bands, then slot format determination accuracy is improved, but configuration information overhead increases
Solution Approach 1:
The patent merges multiple sub-band configuration indications into a unified slot format indication structure. Instead of providing completely separate configuration messages for each sub-band, the system uses a combined indication mechanism where the slot format indicator (SFI) encompasses information for multiple sub-bands, thereby reducing configuration overhead while maintaining the ability to accurately specify transmission directions for each sub-band.
Solution Approach 2:
The patent creates a universal slot format indication mechanism that can simultaneously indicate transmission directions for multiple sub-bands. The SFI structure is designed to be multi-functional, capable of representing different slot formats and sub-band configurations through a single indication, thereby reducing the quantity of configuration information while preserving determination accuracy.
Data Source
AI summary
The present application relates to methods and apparatuses for determining a slot format. One embodiment of the present disclosure provides a user equipment (UE), which includes: a transceiver configured to: receive first configuration information indicating at least one frequency domain resource of at least one first sub-band within one band width part (BWP) of a first number of time units; and a processor configured to: determine one or more first transmission directions of the at least one first sub-band within the BWP for each time unit of the first number of time units at least according to the first configuration information.