NPN Emergency Service Indication via SIB
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 3GPP Rel-16 emergency services are not supported in standalone Non-Public Networks (NPNs), and there is a lack of effective methods for wireless devices to select networks that support emergency services, especially when NPNs are integrated with public networks.
Innovation Solution
The implementation of a method in wireless devices and network nodes to indicate support for Internet Protocol Multimedia Subsystem (IMS) emergency communication services through System Information Blocks (SIB), using network identifiers like PLMN ID and CAG ID, to direct devices to networks that support emergency services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices connect to standalone Non-Public Networks (NPNs), then network coverage and private network functionality are improved, but emergency service support is lost
Solution Approach 1:
The patent introduces a network indicator as an intermediary element that provides information about emergency service support capabilities. This indicator acts as a mediator between the NPN and wireless devices, enabling devices to make informed decisions about network selection without compromising emergency service access. The indicator conveys network capability information that guides devices to appropriate networks for emergency communications.
Solution Approach 2:
The patent segments the network selection process by introducing distinct indicators for different network types (NPN and PLMN). This segmentation allows wireless devices to evaluate and select networks based on specific emergency service support capabilities, rather than treating all networks uniformly. The separate indicators enable fine-grained control over network selection for emergency services.
2Reliability
If wireless devices use current emergency fallback procedures, then emergency service support is maintained in public networks, but the procedures are not applicable to standalone NPNs
Solution Approach 1:
The patent introduces dynamic network indicators that can be configured and updated based on network capabilities and device requirements. These indicators allow the system to adapt to different network scenarios (NPN, PLMN, integrated networks) by providing real-time information about emergency service support. The dynamic nature of the indicators enables flexible adaptation without requiring separate static procedures for each network type.
Solution Approach 2:
The patent changes the parameter of network indication by introducing new indicator types specifically for NPN and PLMN networks. This parameter change enables the system to differentiate between network types and their emergency service capabilities. By modifying the indication parameters, the patent extends emergency service support to previously incompatible network scenarios.
3Measurement precision
If System Information Blocks indicate emergency service support per network, then network selection accuracy is improved, but information complexity increases
Solution Approach 1:
The patent extracts emergency service support information into separate, dedicated indicators within the SIB. Rather than embedding this information within complex existing message structures, the indicators are taken out as distinct elements that can be independently processed. This extraction simplifies device processing by providing clear, isolated information about network capabilities without requiring complex parsing of intertwined data.
Solution Approach 2:
The patent implements a targeted approach by providing emergency service indicators only where needed (in SIBs for NPN and PLMN networks) rather than universally in all system information messages. This partial action reduces the overall information complexity that devices must process, while still providing the necessary precision for network selection in relevant scenarios.
Data Source
AI summary
A method, system and apparatus are disclosed. In some embodiments, a network node configured to communicate with a wireless device (WD) is provided. The network node is configured to indicate, in a System Information Block (SIB) whether a network supports an Internet Protocol (IP) Multimedia Subsystem (IMS) emergency communication service, the indication associated to a network identifier, the network identifier identifying the network. In some embodiments, a wireless device is configured to receive, in a SIB, an indication of whether a network supports an IMS emergency communication service, the indication associated to a network identifier, the network identifier identifying the network; and select a network to initiate an emergency communication service based at least in part on the received indication.