UE Slot Format Configuration for DL/UL Symbol Separation
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing downlink and uplink transmissions in wireless communication devices.
Innovation Solution
Implementing a user equipment (UE) and base station configuration that utilizes Radio Resource Control (RRC) messages to indicate a slot format, separate downlink and uplink configurations, and ensure that a set of symbols in a slot are not simultaneously configured for both downlink and uplink transmissions, thereby enhancing flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a unified communication structure is used for both downlink and uplink transmissions, then device complexity is reduced, but communication flexibility and efficiency deteriorate
Solution Approach 1:
The communication structure is segmented into separate downlink configuration and uplink configuration, each managed independently through RRC messages. This allows the system to maintain simpler individual configuration structures while achieving overall flexibility through the combination of separate configurations.
Solution Approach 2:
The system dynamically assigns transmission directions to symbol sets through RRC configuration, allowing flexible adaptation of downlink and uplink resources based on communication needs. This dynamic allocation enables the system to optimize communication flexibility without permanently increasing structural complexity.
2Productivity
If flexible resource allocation is implemented for downlink and uplink, then communication efficiency improves, but risk of transmission conflicts increases
Solution Approach 1:
The resource allocation is segmented into distinct downlink symbol sets and uplink symbol sets through separate RRC configurations. This segmentation ensures that downlink and uplink transmissions occupy different time-frequency resources, eliminating conflicts while maintaining flexible allocation within each direction.
Solution Approach 2:
The RRC configuration acts as an intermediary layer that mediates between flexible resource allocation requirements and conflict avoidance. By establishing clear separation rules in the configuration messages, the system enables flexible allocation while the intermediary configuration prevents transmission conflicts.
3Reliability
If separate downlink and uplink configurations are used, then transmission clarity improves, but device complexity increases
Solution Approach 1:
The configuration structure uses homogeneous messaging formats for both downlink and uplink configurations, both conveyed through standardized RRC messages. This homogeneity in configuration approach simplifies the overall device complexity while maintaining clear separation and clarity of transmission directions.
Data Source
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AI summary
A UE is described. The UE may include a higher layer processor configured to acquire a common dedicated radio resource control (RRC) configuration message and one or more dedicated RRC configuration messages. The common RRC message may include first information for indicating a slot format. The one or more dedicated RRC configuration messages including second information for configuring a semi-static downlink transmission and third information for configuring a semi-static uplink transmission. The UE may also include receiving circuitry configured to receive the semi-static downlink transmission. The UE may further include transmitting circuitry configured to transmit the semi-static uplink transmission. If the semi-static downlink reception and the semi-static uplink transmission are configured for a same set of symbol(s), the slot format indicates the set of symbol(s) as either downlink or uplink but not as flexible.