Remote UE IMS Registration via Relay UE for Emergency Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In relay communication scenarios, remote UEs cannot initiate emergency services due to the inability of network side devices to obtain identifier information when a P-CSCF lacks an interface with the UE's home network, leading to errors in IMS procedures.
Innovation Solution
The first UE sends an IMS registration message via a second UE, carrying specific information to indicate its status as a remote UE, network registration state, or IP address, allowing the network side device to skip or request identifier information, thus facilitating emergency service initiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a relay UE provides relay service for a remote UE in layer 3-relay communication, then network coverage is expanded and remote UEs can access network services, but the P-CSCF cannot obtain identifier information of the remote UE when it lacks an interface with the home network, causing errors in IMS procedures
Solution Approach 1:
The patent applies preliminary action by having the remote UE include specific indication information in the IMS registration message before the P-CSCF attempts to obtain identifier information. This pre-provided information (indicating remote UE status, relay UE involvement, or network registration state) enables the P-CSCF to skip unnecessary identifier acquisition steps or request them from alternative sources, preventing IMS procedure errors while maintaining expanded network coverage capabilities
2Reliability
If the P-CSCF attempts to obtain identifier information of a remote UE via relay UE, then proper authentication can be performed, but the process becomes complex and time-consuming when the P-CSCF lacks direct interface with the home network
Solution Approach 1:
The patent uses intermediary principles by introducing specific indication information as a mediator between the remote UE and P-CSCF. This indication information acts as an intermediate element that conveys the remote UE's registration status and network connection state, enabling the P-CSCF to understand the communication context without directly querying the home network, thereby simplifying the authentication process while maintaining accuracy
Solution Approach 2:
The patent extracts the essential identification requirements from the complex authentication process. By extracting only the necessary indication information (remote UE status, relay involvement, network registration state) and including it directly in the IMS registration message, the system eliminates unnecessary intermediate steps and reduces processing complexity while maintaining proper authentication capability
3Productivity
If the P-CSCF skips the process of obtaining identifier information, then the IMS registration process is simplified and accelerated, but the P-CSCF may lack necessary information for proper authentication and session management
Solution Approach 1:
The patent applies partial action by having the P-CSCF skip only the specific step of obtaining identifier information from the home network when indication information confirms the remote UE's registration status. This selective skipping maintains registration speed while preserving necessary authentication information, as the indication information itself provides sufficient context for proper session management without requiring additional identifier queries
Data Source
AI summary
A communication method includes sending, by a first UE, an IMS registration message to a first network side device via a second UE. The IMS registration message includes first information; and receiving, by the first UE via the second UE, a response message sent by the first network side device, to complete an IMS registration process, where the first information includes information used to indicate that the first UE is a remote UE.