IP-SM-GW S-CSCF Address Resolution for 4G/5G Message Delivery
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Solution Overview
Problem
Existing IP-SM-GW systems fail to deliver messages due to issues with inconsistent uplink and downlink monitoring ports, leading to failures in delivering call initiation messages, especially during primary/standby IP-SM-GW switching and registration information loss.
Innovation Solution
A method and apparatus for IP-SM-GW that determines the S-CSCF address by checking local registration and success rates, using HSS subscription information to ensure consistent delivery of call initiation messages, employing strategies to update and prioritize S-CSCF addresses for robust message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the IP-SM-GW uses the S-CSCF address of the call initiation S-CSCF for message delivery, then the message delivery path is simplified, but the delivery reliability deteriorates due to inconsistent uplink and downlink monitoring ports
Solution Approach 1:
The patent implements a feedback mechanism where the IP-SM-GW queries the HSS to obtain the correct S-CSCF address associated with the UE's subscription information. This feedback loop resolves the port inconsistency issue by continuously verifying and updating the S-CSCF address mapping, ensuring reliable message delivery while maintaining path simplicity.
Solution Approach 2:
The HSS acts as an intermediary between the IP-SM-GW and the S-CSCF address resolution. The HSS provides the authoritative mapping between UE identifiers and S-CSCF addresses, mediating the conflict between simplified delivery paths and reliable port addressing by centralizing the address resolution function.
2Speed
If the IP-SM-GW stores S-CSCF address registration information locally, then message delivery speed is improved, but the system robustness deteriorates when registration information is lost during primary/standby switching
Solution Approach 1:
The patent performs preliminary action by pre-configuring the IP-SM-GW to query and store S-CSCF address mapping relationships from the HSS before actual message delivery occurs. This preliminary establishment of correct address mappings ensures that even during primary/standby switching when local registration may be lost, the system has pre-validates address information ready for immediate use.
Solution Approach 2:
The system implements beforehand cushioning by maintaining a backup mechanism where the IP-SM-GW can re-query the HSS for S-CSCF address information if local registration is lost. This cushioning against registration loss ensures continuous reliable operation during switching events without complete dependency on local stored registration data.
3Reliability
If the IP-SM-GW queries HSS to obtain S-CSCF address, then the message delivery reliability is improved, but the processing time increases
Solution Approach 1:
The patent applies preliminary action by having the IP-SM-GW query and cache the S-CSCF address mapping from the HSS in advance, before actual message delivery is needed. This pre-resolution of address mapping reduces the processing time during actual message transmission, as the address information is already available locally rather than requiring real-time queries.
Data Source
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AI summary
The present application provides a call initiation processing method and apparatus, an electronic device and a storage medium. The method comprises: receiving a call initiation message sent by a UE, wherein the call initiation message indicates a call initiation S-CSCF and an S-CSCF address of the call initiation S-CSCF; if an S-CSCF address registered by the UE is not stored locally, and the success rate of a delivery message for the call initiation S-CSCF indicated by the call initiation message reaches a first preset threshold, determining the S-CSCF address of the call initiation S-CSCF as the S-CSCF address registered by the UE; if the S-CSCF address registered by the UE is not stored locally, and the success rate of the delivery message for the call initiation S-CSCF does not reach the first preset threshold, determining an S-CSCF address of an S-CSCF associated with the UE in subscription information of an HSS as the S-CSCF address registered by the UE; and according to the S-CSCF address registered by the UE, delivering a response message corresponding to the call initiation message.