Dynamic Configured Grant Allocation for 5G TSN Latency
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Solution Overview
Problem
The 5G mobile communication network faces challenges in minimizing latency when transmitting time-sensitive network (TSN) data, which is critical for applications like smart factories that require low latency and deterministic services.
Innovation Solution
The method involves a terminal operation that adjusts the configuration of configured grants based on the characteristic information of TSN data, allowing for the dynamic allocation of radio resources to minimize latency by shifting or reconfiguring the grant resources in the time domain, ensuring that TSN data is transmitted within a specific latency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a fixed configured grant pattern is used for TSN data transmission, then resource allocation is simple and stable, but transmission latency cannot be minimized for time-sensitive data with varying periodicity requirements
Solution Approach 1:
The configured grant pattern is changed from fixed to dynamic, allowing the base station to adjust the grant pattern according to the periodicity requirements of TSN data. The terminal receives RRC messages configuring multiple CG patterns and activates appropriate patterns based on data characteristics, enabling adaptive latency optimization without excessive complexity
Solution Approach 2:
The invention changes the parameter of configured grant periodicity from a fixed value to a configurable parameter. Multiple CG patterns with different periodicities are pre-configured, and the appropriate pattern is selected based on TSN data requirements, achieving latency minimization through parameter adaptation
2Reliability
If multiple configured grants with different patterns are configured, then transmission latency can be optimized for different TSN data periodicities, but resource allocation complexity and signaling overhead increase
Solution Approach 1:
The configured grant resource is segmented into multiple CG patterns, each with different periodicity characteristics. This segmentation allows the system to match specific CG patterns to specific TSN data periodicity requirements, ensuring deterministic service guarantees while maintaining manageable complexity through structured division
Solution Approach 2:
The multiple configured grants are designed to serve universal TSN data transmission requirements. Each CG pattern can handle different periodicity scenarios, making the system universally applicable to various TSN applications without requiring separate dedicated configurations for each case
3Loss of time
If configured grant resources are shifted in time domain, then latency requirement can be satisfied for urgent TSN data, but resource allocation stability decreases
Solution Approach 1:
The configured grant resources are designed with dynamic time-shifting capability. When latency requirements are urgent, the base station can shift the CG resources in the time domain to achieve earlier transmission. This dynamic adjustment maintains stability during normal operation while enabling rapid response when needed
Data Source
AI summary
An operation method of a terminal in a communication system includes receiving an RRC message from a base station, the RRC message including configuration information of a plurality of CGs; transmitting a first signal to the base station through a first CG resource indicated by a first CG among the plurality of CGs; receiving a control message from the base station; and based on a result of receiving the control message, transmitting a second signal to the base station through a second CG resource indicated by an activated second CG among the plurality of CGs, wherein a pattern of the first CG resource is different from a pattern of the second CG resource.