5G Terminal Scheduling Request Settings for Signal Reach
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Solution Overview
Problem
In fifth-generation cellular radio communication systems, there is a challenge in meeting the latency requirements for scheduling requests due to the limited geographical range of signal transmission and interference with existing radio resources, particularly when using short-duration resources.
Innovation Solution
A terminal device selects from multiple settings of bandwidth, time duration, and periodicity for scheduling requests, and a base station device determines and notifies these settings based on latency requirements and transmission path loss, allowing the terminal device to adjust its transmission strategy accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a radio resource having a short time duration is used for scheduling request transmission, then the latency requirement can be met, but the terminal device cannot transmit with sufficient power to reach distant base stations
Solution Approach 1:
The patent applies dynamics by making the scheduling request transmission configurable with multiple time duration settings (e.g., 1 slot, 2 slots, 4 slots) that can be dynamically selected based on terminal device conditions. The base station notifies the terminal of appropriate time duration settings, allowing adaptive adjustment between short duration (for low latency) and longer duration (for reliable transmission at distance), thus resolving the contradiction between latency and signal reachability.
2Productivity
If a radio resource having a short time duration is used, then the transmission time is reduced, but the geographical range in which the terminal device can transmit effectively is limited
Solution Approach 1:
The patent applies parameter changes by introducing multiple configurable parameters for scheduling request transmission, including time duration (1 slot, 2 slots, 4 slots), bandwidth, and periodicity. The base station notifies the terminal of appropriate parameter settings based on terminal capability and channel conditions. This allows the system to adapt to different geographical ranges and transmission scenarios, resolving the contradiction between transmission speed and geographical coverage.
3Adaptability or versatility
If multiple settings with different bandwidth, time duration, and periodicity combinations are provided, then the terminal can adapt to varying communication environments, but the system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously select appropriate scheduling request transmission parameters from the notified settings based on its current situation (e.g., distance from base station, channel conditions, latency requirements). The terminal uses its own judgment to choose the most suitable configuration without requiring complex centralized control, thus achieving environmental adaptability while keeping system complexity manageable.
Data Source
AI summary
A terminal device selects, in a case where data that is to be transmitted to the base station device is generated, one setting for use in transmission of a scheduling request to a base station device, from among a plurality of settings that correspond to different combinations of a bandwidth, a time duration, and a periodicity and can be used in transmission of the scheduling request, and transmits the scheduling request to the base station device with use of the one setting that was selected.