5G Time-Sensitive Communication QoS Alternatives via PCF
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Solution Overview
Problem
The existing 3GPP standards for specifying QoS parameters in 5G networks result in excessive signaling overhead and network burden due to numerous unnecessary requests for time-sensitive communication, as applications are unaware of the network's capabilities and sequentially adjust their requests until an acceptable parameter is found.
Innovation Solution
The implementation of alternative QoS-related parameter sets and traffic pattern parameter sets by the Policy Control Function (PCF) based on network capabilities, allowing for the selection and transmission of optimized QoS rules to the Session Management Function (SMF), reducing unnecessary requests and signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If applications sequentially adjust QoS requests to find acceptable parameters, then QoS requirements are eventually met, but signaling overhead and network burden increase significantly
Solution Approach 1:
The network performs preliminary capability assessment and determines suitable QoS parameters before the application needs to request them. The PCF proactively identifies applications requiring TSC QoS and pre-calculates appropriate parameter sets based on current network conditions, eliminating the need for applications to sequentially adjust requests through multiple signaling exchanges.
Solution Approach 2:
The Policy Control Function (PCF) acts as an intermediary between the application and the network core. It receives QoS requests from applications, translates them into network-capable parameters, and manages the parameter selection process. This intermediary role consolidates the complexity of sequential parameter adjustment in the network rather than at the application level, reducing overall signaling overhead.
2Reliability
If applications generate numerous QoS requests to find suitable parameters, then acceptable QoS is achieved, but processing consumption at user devices and network increases
Solution Approach 1:
The network's Policy Control Function performs self-service by automatically assessing its own capabilities and selecting appropriate QoS parameter sets without requiring applications to generate multiple试探性 requests. The PCF monitors network conditions and proactively determines suitable parameters, eliminating the energy-consuming trial-and-error process at user devices.
Solution Approach 2:
The system implements feedback mechanisms where the PCF receives information about application QoS requirements and network conditions, then adjusts and selects optimal parameter sets accordingly. This feedback loop enables the network to make informed decisions about QoS parameters based on real-time conditions, avoiding unnecessary processing at user devices that would occur in open-loop sequential adjustment approaches.
3Manufacturing precision
If the network accepts precise TSC QoS parameters from applications, then time-sensitive communication quality improves, but network burden and signaling overhead increase
Solution Approach 1:
The system transforms the precision requirement from application-generated parameters to network-selected parameters. Instead of applications specifying precise TSC parameters that may not align with network capabilities, the PCF receives application requirements and translates them into precise parameter sets that are guaranteed to be network-supported. This parameter transformation maintains precision while reducing network burden by consolidating the selection logic in the network core.
Data Source
AI summary
Methods, apparatuses, and computer program products provide for specifying, in quality of service (QoS) requests, alternative QoS-related parameter sets and/or alternative traffic pattern parameter sets. In the context of one method, the method receives a QoS request comprising one or more QoS parameters and/or one or more traffic pattern parameters, and one or more alternative QoS parameter sets and/or one and more alternative traffic pattern parameter sets. The method also selects the one or more QoS parameters or an alternative QoS parameter set of the one or more alternative QoS parameter sets based on a supporting capability of a network. The method also causes transmission of a Policy and Charging Control (PCC) rule based on the selected parameters and transmits an indication of the selected parameters.