Scheduling Request Configuration for 5G Service Differentiation
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Solution Overview
Problem
5G communication systems face challenges in efficiently configuring scheduling requests (SRs) for terminals, particularly in managing different quality of service (QoS) levels and reducing signaling overhead for various services like eMBB, URLLC, and mMTC, which can lead to terminal malfunctioning and delayed uplink data transmission.
Innovation Solution
The method involves configuring multi-bit SRs and multiple SR configurations to differentiate between services based on numerology, transmission time interval (TTI), and latency requirements, allowing for service-specific resource allocation and improved scheduling efficiency, including the use of time division duplex (TDD) and frequency division duplex (FDD) schemes to manage SR resources and uplink grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SR configurations are implemented to differentiate services, then service-specific resource allocation is improved, but device complexity increases
Solution Approach 1:
The patent segments SR configurations into service-specific configurations, where each service (eMBB, URLLC, mMTC) has its own SR configuration parameters including numerology, TTI length, and latency requirements. This allows the terminal to selectively apply appropriate configurations based on the service type, improving resource allocation efficiency while managing complexity through structured segmentation.
Solution Approach 2:
Different SR configuration parameters are applied locally to different services according to their specific requirements. For example, URLLC services receive configurations with shorter TTI and lower latency parameters, while eMBB services receive configurations optimized for higher data rates. This local optimization improves overall system adaptability without requiring complete reconfiguration of all services.
2Productivity
If multi-bit SRs are configured for different services, then scheduling efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple SR configurations into a unified SR message structure that can carry service differentiation information through multi-bit indicators. Instead of sending separate SR messages for each service, the terminal consolidates service-specific information into a single multi-bit SR field, reducing the number of transmissions while maintaining scheduling efficiency.
Solution Approach 2:
The SR configuration structure is designed to be universal across different service types, with multi-bit fields that can represent various service characteristics (numerology, TTI, latency) within a single message format. This universal structure allows the same SR mechanism to serve multiple services with different requirements, improving productivity while controlling signaling overhead through format efficiency.
3Productivity
If service-specific SR configurations are used, then uplink data transmission is optimized, but terminal malfunction risk increases
Solution Approach 1:
The network pre-configures multiple SR configurations for different services before the terminal needs to transmit uplink data. These configurations include all necessary parameters (numerology, TTI length, latency requirements) that the terminal will need. By preparing configurations in advance, the terminal avoids complex real-time decisions that could lead to malfunctions, while still achieving optimized uplink transmission when data needs to be sent.
Solution Approach 2:
The terminal is equipped with pre-configured service-specific SR parameters that enable it to autonomously select and apply the appropriate configuration based on the service type without requiring complex real-time network interaction. This self-service capability improves uplink transmission efficiency while reducing the risk of terminal malfunction by eliminating complex runtime configuration decisions.
Data Source
AI summary
A method of a terminal in a mobile communication system includes receiving, from a base station, information including scheduling request (SR) configurations and an allowed subcarrier spacing (SCS) corresponding to a first logical channel and SR configurations and an allowed SCS corresponding to a second logical channel; transmitting, to the base station, an SR based on the SR configurations corresponding to the first logical channel or the SR configurations corresponding to the second logical channel; receiving an uplink grant in response to the SR from the base station; identifying an SCS associated with a bandwidth part (BWP) including the uplink grant; and selecting logical channels between the first logical channel and the second logical channel such that the identified SCS associated with the BWP is matched to the allowed SCS included in the information.