Numerology-Based Scheduling Requests for Differentiated 5G Services
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Solution Overview
Problem
The existing LTE SR mechanism is inadequate for the diverse service requirements of 5G wireless communications, failing to provide differentiated scheduling for various services such as eMBB, URLLC, and mMTC, leading to inefficiencies in uplink resource allocation.
Innovation Solution
A method and apparatus for transmitting scheduling requests (SRs) that utilize numerology-based SR configurations, allowing the terminal device to select appropriate SR parameters based on the service type, and enabling the access network device to allocate uplink resources accordingly, thereby supporting differentiated scheduling for multiple services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single SR configuration is used for all services, then device complexity is reduced, but adaptability to different service requirements deteriorates
Solution Approach 1:
The patent divides the single SR configuration into multiple SR configurations, each associated with different numerologies (subcarrier spacing values). This segmentation allows different services to use different SR configurations based on their requirements, resolving the contradiction between complexity and adaptability.
Solution Approach 2:
The patent assigns different SR configuration parameters (such as sr-PUCCH-ResourceIndex, sr-ConfigIndex) to different numerologies locally. Each numerology has its own optimized SR configuration, allowing local optimization for different service types without affecting other services.
2Adaptability or versatility
If multiple SR configurations are introduced for different services, then adaptability to service requirements is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal SR configuration framework that works across multiple numerologies and service types. The base station configures multiple SR configurations that can be universally applied to different services (eMBB, URLLC, mMTC) based on their numerology requirements, achieving multi-functionality without proportionally increasing complexity.
Solution Approach 2:
The patent manages complexity by systematically varying key parameters (subcarrier spacing, SR periodicity, PUCCH resource indices) across different configurations. This parameter-based approach allows the system to handle multiple services through controlled parameter variations rather than fundamentally different configuration structures.
3Ease of operation
If SR resources are allocated without service differentiation, then resource allocation simplicity is maintained, but uplink resource allocation efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic SR resource allocation where the base station can assign different SR configurations to different services based on real-time requirements. The system dynamically selects which SR configuration to use based on the service type and current channel conditions, improving allocation efficiency while maintaining operational simplicity through automated selection.
Data Source
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AI summary
This application provides a method for transmitting a scheduling request SR. The method includes: sending, by an access network device, an SR configuration to a terminal device, where the SR configuration includes SR parameters corresponding to a plurality of wireless physical layer parameter numerologies. When there is to-be-sent uplink data, the terminal device selects, according to a preset policy, one SR parameter corresponding to a logical channel LCH on which the uplink data is located, and transmits an SR on an SR resource corresponding to the selected SR parameter, to request an uplink grant. Further, the terminal device requests the uplink grant with reference to a maximum number of SR transmission on the LCH and/or a maximum number of SR transmission of the terminal device in the SR configuration.