Terminal Subcarrier Spacing Switching Delay Management
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Solution Overview
Problem
In next-generation mobile communication systems, particularly in frequency range 4 (FR4) with a subcarrier spacing wider than 120 kHz, there is a lack of clear definitions and progress in addressing the transient period, Bandwidth Part (BWP) switching delay, and beam switching delay, which can degrade communication quality and suppress communication throughput.
Innovation Solution
A terminal is configured with a control section that assumes certain restrictions on communication, such as a subcarrier spacing wider than a certain threshold, and a transmitting/receiving section that performs transmission/reception processing based on these restrictions, thereby managing the transient period and other switching delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a relatively wide subcarrier spacing (larger than 120 kHz) is used in FR4, then communication throughput can be increased, but communication quality degrades due to undefined transient period and switching delays
Solution Approach 1:
The patent applies parameter changes by establishing specific transient period durations and switching delay values based on subcarrier spacing parameters. When SCS exceeds 120 kHz, the patent defines transient period as at least 1 symbol and switching delays (BWP, beam) as at least 1 slot, creating a parameter-based solution that adapts to wide SCS conditions while maintaining communication quality.
2Reliability
If clear definition of transient period and switching delays is established for wide SCS, then communication quality is maintained, but system complexity increases due to additional restrictions
Solution Approach 1:
The patent applies local quality by implementing restrictions specifically for wide SCS scenarios (SCS > 120 kHz) rather than uniformly across all SCS values. The control section selectively applies transient period and switching delay definitions only when the subcarrier spacing parameter indicates wide SCS, thereby maintaining communication quality where needed without unnecessarily complicating the system for normal SCS operations.
3Device complexity
If transient period and switching delays are not defined for wide SCS, then system operation remains simple, but communication throughput increase is suppressed due to quality degradation
Solution Approach 1:
The patent applies dynamics by making the transient period and switching delay definitions conditional on the subcarrier spacing parameter. The system dynamically adapts its behavior: when SCS is wide (>120 kHz), the defined transient period (≥1 symbol) and switching delays (≥1 slot) are applied to maintain quality; when SCS is normal, these restrictions are not applied, keeping operations simple. This dynamic approach enables throughput improvement in FR4 without permanent system complexity.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes a control section that assumes a certain restriction being applied to a communication supporting a subcarrier spacing wider than a certain subcarrier spacing, and a transmitting/receiving section that performs transmission/reception processing of the communication based on the certain restriction. According to an aspect of the present disclosure, it is possible to suitably suppress adverse influence of a time taken for communication switching even when a relatively wide subcarrier spacing is used.