Scheduling Request Configuration for Multi-Channel Uplink Latency
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Solution Overview
Problem
Existing scheduling request (SR) mechanisms in wireless communication systems are inefficient for handling multiple logical channels with varying priorities, leading to latency and waste of SR configurations, particularly in Ultra-Reliable and Low Latency Communications (URLLC) services.
Innovation Solution
A method and apparatus that determine a set of target SR configurations from multiple candidate configurations associated with logical channels, considering priority and availability of data, to optimize SR transmission and utilize available SR resources more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SR configuration is used per logical channel, then the system maintains simple SR management, but SR opportunities are wasted when multiple logical channels have pending data
Solution Approach 1:
The patent enables a single SR configuration to serve multiple logical channels simultaneously. When data becomes available on any logical channel configured with the same SR configuration, the SR can be triggered to request uplink resources for that channel, making the SR mechanism universal across multiple channels rather than dedicated to a single channel.
Solution Approach 2:
The patent merges multiple logical channel configurations into a shared SR configuration. Instead of having separate SR configurations for each logical channel, multiple logical channels are grouped to share common SR resources, reducing the total number of SR configurations and improving resource utilization efficiency.
2Reliability
If multiple SR configurations are allowed per logical channel, then SR opportunities are reserved for URLLC services, but the SR procedure becomes more complex
Solution Approach 1:
The patent segments SR configurations into multiple independent configurations, each associated with specific logical channels. This allows different SR configurations to be optimized for different service requirements (e.g., one configuration for eMBB, another for URLLC), enabling reliable URLLC service while maintaining manageable complexity through clear segmentation.
Solution Approach 2:
The patent introduces dynamic selection of SR configurations based on the triggering logical channel. When data arrives on a logical channel, the system dynamically determines which SR configuration to use based on pre-configured associations, allowing flexible adaptation to different service requirements without hardcoding complex decision logic.
3Productivity
If SR resources are allocated for each logical channel, then each channel can request resources independently, but SR resources are wasted when not all channels have simultaneous data
Solution Approach 1:
The patent makes SR configurations universal by allowing them to serve multiple logical channels. A single SR configuration can be triggered by data arrival on any of its associated logical channels, eliminating the need for separate SR configurations for each channel and improving resource utilization efficiency.
Solution Approach 2:
The patent changes the parameter of SR configuration association from one-to-one to one-to-many. Instead of each SR configuration being tied to a single logical channel, the association parameter is changed to allow multiple logical channels to share an SR configuration, thereby reducing the total number of SR configurations needed while improving utilization.
Data Source
AI summary
Example embodiments of the present disclosure relate to apparatus, method and computer readable storage media of scheduling request management. The method includes in accordance with a determination that data on a logical channel is available for transmission, determining, at an apparatus, whether there is pending data available for transmission on one or more further logical channels; and in accordance with a determination that there is pending data available for transmission, determining a set of target scheduling request, SR, configurations available for a SR procedure from a plurality of candidate SR configurations associated with the logical channel and the one or more further logical channels; and performing the SR procedure based on the target SR configuration. In this way, the waste of the SR configurations can be avoided and the SR may be transmitted using the fastest SR opportunity.