Scheduling Request Resource Selection for Low-Latency 5G Uplink
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Solution Overview
Problem
In fifth-generation cellular radio communication systems, the conventional scheduling request transmission with 0.5 ms time slots every 10 ms or 20 ms limits latency and geographical range, making it difficult for distant terminal devices to effectively transmit signals without interfering with other communications.
Innovation Solution
A terminal device employs multiple radio resource settings with varying bandwidths, durations, and periodicities, allowing it to adaptively select the most suitable setting based on latency requirements and transmission path loss for scheduling requests, ensuring effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a radio resource with short time duration is used for scheduling request transmission, then latency is reduced, but the geographical range for effective transmission is limited
Solution Approach 1:
The patent applies dynamics by making the radio resource configuration adjustable and adaptable. The base station dynamically configures different radio resource parameters (time duration, bandwidth, periodicity) based on terminal device conditions such as distance and path loss, allowing the system to optimize between latency and geographical range in real-time scenarios
Solution Approach 2:
The patent implements parameter changes by varying multiple radio resource parameters simultaneously. When a terminal device is distant from the base station, the system increases time duration and bandwidth parameters while adjusting periodicity, which extends the effective transmission range while maintaining acceptable latency performance
2Length of stationary object
If transmission power is increased to reach distant base stations, then signal reach is improved, but interference with other signals increases
Solution Approach 1:
The patent merges multiple transmission parameters (time duration, bandwidth, periodicity) into a coordinated configuration strategy. By combining extended time duration with increased bandwidth, the system achieves better signal reach through enhanced signal energy distribution across frequency and time domains, rather than relying solely on power increase
Solution Approach 2:
The patent utilizes periodic action by configuring radio resources with appropriate periodicity. The periodic transmission opportunities allow terminals to send scheduling requests at optimal intervals, ensuring signal reach while distributing transmission energy over time to reduce peak interference levels
3Object-generated harmful factors
If conventional scheduling request transmission is used with 0.5 ms time slots every 10 ms or 20 ms, then interference is reduced, but latency requirement cannot be met
Solution Approach 1:
The system dynamically adjusts radio resource parameters based on service requirements. For URLLC services requiring low latency, the base station configures shorter time durations and adjusted periodicity, while maintaining interference management through coordinated resource allocation across multiple terminals
Solution Approach 2:
The patent changes multiple parameters simultaneously to resolve the contradiction. By reducing time slot duration and adjusting bandwidth allocation, the system achieves lower latency while managing interference through optimized resource density and terminal-specific configuration
Data Source
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AI summary
A terminal device selects 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, in a case where data that is to be transmitted to the base station device is generated.