5G TSC QoS Selection with TSN-to-5GS Clock Compensation
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Solution Overview
Problem
The challenge of satisfying delay requirements for time sensitive communication (TSC) in 5G networks due to the difference between the TSN clock and the 5GS clock when selecting a 5QI based on the TSN clock is not adequately addressed by existing technologies.
Innovation Solution
A method involving an application function (AF) entity and a policy control function (PCF) entity that obtain and convert delay-related information between the 5th generation system (5GS) and time sensitive network (TSN) clocks to determine a quality-of-service (QoS) policy, ensuring the 5G network meets the required delay requirements by selecting appropriate 5QI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 5QI is selected based on the TSN clock for time sensitive communication, then the TSC delay requirements can be met, but the delay requirement may not be satisfied due to the difference between the TSN clock and the 5GS clock
Solution Approach 1:
The patent introduces a clock difference compensation mechanism as an intermediary between the TSN clock and 5GS clock. The AF entity obtains both TSN delay requirements and 5GS clock characteristics, calculates the clock difference, and uses this compensation to select appropriate 5QI values. This mediator resolves the contradiction by translating between the two different time reference systems.
Solution Approach 2:
The patent changes the parameter basis for 5QI selection from directly using TSN clock values to using 5GS clock values adjusted by clock difference compensation. The AF entity modifies the delay parameter by accounting for the clock frequency difference between TSN and 5GS, thereby selecting 5QI values that actually satisfy the delay requirement in the 5GS network context.
2Stability of the object's composition
If the 5G network uses the TSN clock for QoS policy selection, then time synchronization with TSN network is achieved, but the delay requirement may not be satisfied when selecting 5QI
Solution Approach 1:
The patent uses clock difference compensation as an intermediary layer that maintains both TSN time synchronization and 5GS delay requirement satisfaction. The AF entity acts as a mediator that translates TSN delay requirements into 5GS-appropriate parameters by compensating for clock differences, allowing the system to maintain stability in time synchronization while ensuring reliability in delay satisfaction.
Solution Approach 2:
The patent performs preliminary clock difference calculation and compensation before 5QI selection. The AF entity obtains clock characteristics and calculates the difference in advance, then uses this pre-computed compensation information to select appropriate 5QI values, ensuring both time synchronization stability and delay requirement reliability from the outset.
Data Source
AI summary
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. The present invention relates to a method for an application function (AF) entity for time sensitive communication (TSC) in a wireless communication system, the method comprising the steps of: obtaining first delay-related information on a time sensitive network (TSN); obtaining second delay-related information on a 5th generation system (5GS); and transmitting, to a policy control function (PCF) entity, a quality of service (QoS)-related request based on the first delay-related information and the second delay-related information.