User Terminal DCI Field Control for Cross-Cell Configured Grant Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The control of configured grant and semi-persistent scheduling for downlink shared channels in next-generation mobile communication systems, particularly in 5G networks, is not clearly defined, especially for cross-cell and cross-Bandwidth Part (BWP) scenarios, leading to challenges in managing resource allocation and deactivation.
Innovation Solution
A user terminal receives downlink control information to activate or deactivate configured grant type 2 and semi-persistent scheduling by specific field values in the downlink control information, using DCI formats such as 0_0, 0_1, 1_0, and 1_1, which include special fields like HARQ process number, redundancy version, and frequency domain resource assignment to indicate activation or deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If downlink control information is used to activate configured grant or DL SPS in another cell or BWP, then resource allocation control is improved, but control reliability deteriorates due to unclear deactivation mechanisms
Solution Approach 1:
The patent uses different field values in DCI to indicate different control states (activation vs. deactivation). Specifically, it checks whether the frequency domain resource assignment field and HARQ process number field match predetermined values to determine the intended operation, analogous to using different signals or indicators to convey different meanings.
Solution Approach 2:
The patent introduces an intermediary checking mechanism that verifies both the frequency domain resource assignment field and HARQ process number field before executing deactivation. This intermediary step prevents false deactivation by ensuring the DCI is genuinely intended for deactivation, thus resolving the reliability issue while maintaining ease of operation.
2Productivity
If DCI fields are used to indicate activation and deactivation, then signaling efficiency is improved, but false alarm rate increases due to field value ambiguity
Solution Approach 1:
The patent assigns specific predetermined values to fields in DCI to distinguish between activation and deactivation commands. By checking whether fields match these predetermined values, the system can reliably interpret the intended operation without increasing false alarms, thus maintaining signaling efficiency while improving reliability.
Solution Approach 2:
The patent implements a feedback verification mechanism where the user terminal checks multiple fields (frequency domain resource assignment and HARQ process number) against predetermined values before executing deactivation. This feedback loop prevents false interpretation of DCI, reducing false alarm rate while maintaining signaling efficiency.
3Adaptability or versatility
If cross-cell and cross-BWP scheduling is implemented, then system versatility is improved, but control complexity increases due to undefined deactivation procedures
Solution Approach 1:
The patent uses field value patterns as indicators to simplify cross-cell and cross-BWP deactivation control. By checking whether specific fields match predetermined values, the user terminal can automatically determine the correct deactivation procedure without complex configuration, thus reducing control complexity while maintaining system versatility.
Solution Approach 2:
The patent enables the user terminal to autonomously determine whether to activate or deactivate configured grant or DL SPS by independently checking DCI field values against predetermined criteria. This self-service mechanism eliminates the need for complex external control procedures, reducing control complexity while supporting versatile cross-cell and cross-BWP scheduling.
Data Source
AI summary
A user terminal includes a receiving section that receives, in a first cell, first downlink control information indicating that configuration of configured grant type 2 or downlink Semi-Persistent Scheduling (DL SPS) of a second cell or a specific Bandwidth Part (BWP) is to be activated, and receives second downlink control information, and a control section that considers that the configuration is to be deactivated, based on a value of a specific field in the second downlink control information. According to an aspect of the present disclosure, configured grant or DL SPS can be appropriately controlled by using downlink control information.