Dynamic Paging Subgroup Assignment for 5G UE
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing and updating paging subgroups for user equipment (UE) due to limitations in handling changes in RRC connection states and UE capabilities, leading to suboptimal paging performance.
Innovation Solution
A method and apparatus that allow UE to initiate updates of its paging subgroup ID by transmitting paging assistance information to the Access and Mobility Management Function (AMF) and base station, enabling dynamic configuration and management of paging subgroups based on RRC state changes and UE capabilities, ensuring optimal paging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network assigns paging subgroups statically, then the device complexity is reduced, but the adaptability to different UE capabilities and RRC states deteriorates
Solution Approach 1:
The patent implements dynamic paging subgroup assignment where the network can update the paging subgroup ID for a UE based on its current RRC state (idle or inactive) and capability information. The AMF receives paging assistance information from the UE indicating its capability to support network-assigned subgrouping, and the network dynamically selects appropriate paging subgroups accordingly, allowing the system to adapt to changing conditions without requiring complex static pre-configuration for all scenarios.
Solution Approach 2:
The patent changes the paging subgroup ID parameter dynamically based on UE capability and RRC state. When a UE indicates it supports network-assigned subgrouping, the network assigns a specific paging subgroup ID; when the UE does not support this feature or transitions between RRC states, the network updates the paging subgroup ID accordingly. This parameter change approach allows flexible adaptation without increasing fundamental system complexity.
2Adaptability or versatility
If the network dynamically updates paging subgroup ID, then the adaptability to UE capabilities is improved, but the loss of time for paging updates increases
Solution Approach 1:
The patent implements preliminary action by having the UE provide paging assistance information indicating its capability to support network-assigned subgrouping in advance, during the initial registration or capability exchange phase. The network uses this pre-provided information to make immediate paging subgroup assignments without requiring time-consuming capability queries later. This preliminary capability declaration eliminates delays during actual paging operations.
Solution Approach 2:
The patent implements feedback mechanisms where the UE provides capability information about its support for network-assigned subgrouping, and the network responds by appropriately assigning and updating paging subgroup IDs. This feedback loop allows the network to adapt quickly to UE capabilities without repeated negotiations, reducing the time required for paging subgroup management while maintaining high adaptability.
3Measurement precision
If the UE provides detailed paging assistance information, then the measurement precision for paging optimization is improved, but the device complexity increases
Solution Approach 1:
The patent extracts only the essential capability information needed for paging optimization - specifically, whether the UE supports network-assigned subgrouping. Rather than requiring the UE to provide comprehensive capability sets, the patent isolates and transmits only this critical binary capability indicator in the paging assistance information. This extraction approach achieves sufficient measurement precision for paging decisions while keeping the information structure simple and the processing burden minimal.
Data Source
AI summary
The method of wireless communication may include a UE, a base station, and a core network including an AMF. The UE may initiate an update of the paging subgroup ID assigned to the UE by transmitting paging assistance information to the AMF. The paging assistance information may include an expected paging probability of the UE. The base station may initiate an update of the paging subgroup ID assigned to the UE based on the change of RRC connection between the UE and the base station. The core network including the AMF may transmit an updated paging subgroup ID to the UE. The core network including the AMF may configure a set of candidate subgroups associated with the UE, and the base station may update the paging subgroup ID of the UE based on releasing the RRC connection to the RRC inactive state.