Slot Format Determination in Wireless BWP Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently determining slot formats for Downlink (DL) and Uplink (UL) Bandwidth Parts (BWP) in wireless communication systems, particularly in scenarios where the number of slot format values in a slot format combination cannot be divided by a specific number related to the subcarrier spacing configurations, leading to inconsistencies and potential errors in slot format indication.
Innovation Solution
The method involves configuring DL and UL BWP in a serving cell, transmitting Downlink Control Information (DCI) with slot format combinations, and ensuring that the number of slot format values is divisible by a number associated with the difference in subcarrier spacing configurations, thereby preventing errors and inconsistencies by padding or adjusting slot format values as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network transmits slot format combinations in DCI without ensuring divisibility by the number associated with SCS difference, then the signaling flexibility is maintained, but inconsistencies and errors in slot format indication occur
Solution Approach 1:
The network performs preliminary validation to ensure the number of slot format values is divisible by the first number (associated with SCS difference) before transmitting the DCI. This preventive measure avoids inconsistencies and errors in slot format indication, thereby improving reliability without adding complex runtime handling mechanisms.
2Reliability
If the network pads or adjusts slot format values to ensure divisibility, then slot format determination consistency is improved, but the signaling overhead increases
Solution Approach 1:
The network dynamically adjusts the number of slot format values in the DCI to match the required divisibility condition. By changing the parameter of slot format combination size based on the SCS difference, the system ensures consistent slot format determination while minimizing unnecessary padding and reducing signaling overhead.
3Adaptability or versatility
If the system supports paired spectrum operation with different SCS configurations for DL and UL BWPs, then the adaptability of the wireless system is improved, but the complexity of slot format management increases
Solution Approach 1:
The system separately manages slot format combinations for DL BWP and UL BWP, with each having its own configurable number of slot format values. This segmentation allows independent optimization of each BWP's slot format management while maintaining overall system adaptability for paired spectrum operation.
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a network. In one embodiment, the method includes the network configuring a DL (Downlink) BWP (Bandwidth Part) and an UL (Uplink) BWP in a first serving cell to a UE (User Equipment). The method also includes the network configuring a paired spectrum operation in the first serving cell to the UE. The method further includes the network transmitting a first DCI (Downlink Control Information) to the UE, wherein the first DCI comprises a slot format combination indicating one or more slot format values for the DL BWP and one or more slot format values for the UL BWP. In addition, the method includes the network prevents from setting an amount of slot format values in the slot format combination in the first DCI to be not divided by a first number, wherein the first number is associated with an absolute value of a difference of a first SCS (Subcarrier Spacing) configuration and a second SCS configuration.