Paging Cause Determination for 5G Inactive Devices
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Solution Overview
Problem
Current systems lack an efficient mechanism to convey a Paging Cause parameter in the Uu Paging message for UE in RRC_INACTIVE state, impacting paging strategies and traffic management in 5G networks.
Innovation Solution
The proposed solution involves determining the Paging Cause based on the differentiated service code point (DSCP) received from the UPF and incorporating it into the CN tunnel header, allowing the NG-RAN to convey the Paging Cause to the UE through the Uu Paging message, enabling tailored paging policies for different traffic types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If paging cause determination mechanism is not implemented for inactive devices, then the system maintains simplicity in paging procedures, but paging strategy differentiation and traffic management efficiency deteriorate
Solution Approach 1:
The patent segments the paging mechanism by introducing different paging cause values (e.g., mobile terminated data, mobile terminated signaling, emergency calls) that can be conveyed to inactive devices through the Uu Paging message. This segmentation allows the network to differentiate paging strategies based on traffic type without fundamentally changing the overall paging architecture, thus improving productivity while maintaining acceptable complexity.
Solution Approach 2:
The patent uses the Paging Cause parameter as an intermediary element that carries traffic type information from the network to the inactive device. This intermediary enables differentiated paging strategies by providing additional information context without requiring complex system-wide changes, resolving the contradiction between simplicity and differentiation.
2Productivity
If Paging Cause parameter is conveyed to UE in RRC_INACTIVE state, then traffic management efficiency improves, but message overhead and processing complexity increase
Solution Approach 1:
The patent merges the Paging Cause parameter into the existing Uu Paging message structure, combining multiple functions (paging notification and traffic type indication) into a single message. This approach improves traffic management efficiency by providing cause information while minimizing additional overhead by reusing the existing paging message framework rather than creating separate signaling messages.
3Productivity
If differentiated paging policies are implemented for various traffic types, then network efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies local quality by implementing differentiated paging policies at the specific level of individual paging messages through the Paging Cause parameter, rather than requiring system-wide structural changes. Each paging message can be tailored to its specific traffic type (data, signaling, emergency) while using the same overall paging mechanism, thus improving network efficiency without proportionally increasing system complexity.
Data Source
AI summary
The present disclosure describes techniques for utilizing paging cause values for paging user equipment (UE). The Paging Cause may be used for the UE in an CM_IDLE state or when the UE is in an RRC_INACTIVE state. A paging cause information element is included in a paging message, and includes a paging cause value. The paging cause value indicates a type of traffic that has initiated a paging operation. Other embodiments may be described and/or claimed.