UDM Routing for Roaming SMS Domain Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the efficient delivery of short messages to roaming user equipment (UE) attached to multiple visited public land mobile networks (PLMNs) is hindered by the lack of interfaces between different SMS serving entities, leading to challenges in domain selection and message delivery.
Innovation Solution
A unified data management (UDM) system is implemented, which receives short message service-gateway mobile switching center (SMS-GMSC) routing information and transmits it to a home short message service function (H-SMSF) for domain selection, allowing for the allocation of an H-SMSF to perform MT SMS domain selection and delivery to target entities such as V-SMSF, SGs MSC, MME, or IP-SM-GW, based on domain order information and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a roaming UE is attached to multiple visited PLMNs with respective SMS serving entities, then the UE can receive SMS services from multiple networks, but the lack of interfaces between different SMS serving entities prevents proper domain selection and message delivery
Solution Approach 1:
The H-SMSF acts as an intermediary between the SMS-GMSC and the various SMS serving entities (V-SMSF, SGs-MSC, MME, IP-SM-GW). It receives routing information from the SMS-GMSC, performs domain selection based on this information, and forwards messages to the appropriate target entity, thereby enabling reliable message delivery across multiple PLMNs despite the absence of direct interfaces between SMS serving entities
Solution Approach 2:
The system segments the SMS delivery function into separate components: the H-SMSF handles domain selection and routing decisions, while the actual message delivery is performed by specialized SMS serving entities (V-SMSF, SGs-MSC, MME, IP-SM-GW) according to the selected domain. This segmentation allows each component to perform its specific function efficiently
2Ease of operation
If domain selection is performed without centralized H-SMSF coordination, then each SMS serving entity operates independently, but this leads to delivery failures due to lack of interface definitions between entities
Solution Approach 1:
The H-SMSF serves as a centralized intermediary that coordinates domain selection across all SMS serving entities. It receives routing information from the SMS-GMSC, determines the appropriate domain and target entity, and guides the message flow accordingly, ensuring reliable delivery while allowing each SMS serving entity to operate independently according to its capabilities
Data Source
AI summary
A method of transmitting and receiving a short message (SM)-related signal by a unified data management (UDM) in a wireless communication system. The method includes: receiving, by the UDM from a short message service-gateway mobile switching center (SMS-GMSC), SM routing information that is related to an SM of a roaming user equipment (UE); and transmitting, by the UDM to a Home Short Message Service Function (H-SMSF), the SM routing information, for domain selection by the H-SMSF for delivery of the SM.