UDM SMS Waiting Context for 5G Delivery Reliability
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Solution Overview
Problem
The existing 5G network architecture lacks support for maintaining SMS waiting contexts, which is essential for re-attempting unsuccessful mobile terminating SMS deliveries, particularly due to issues like UE reachability and memory capacity, leading to failed SMS delivery re-attempts in 5GC deployments.
Innovation Solution
Introducing a method where the Unified Data Management (UDM) entity maintains an SMS waiting context at the Unified Data Repository (UDR) using HTTP requests, allowing for querying, creating, updating, and deleting this context to manage re-attempts of MT SMS deliveries, including indicators for reachability and memory availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing 5G network architecture is used without SMS waiting context maintenance, then the network structure remains simple, but SMS delivery re-attempts fail due to lack of context data
Solution Approach 1:
The patent applies preliminary action by maintaining SMS waiting context data in advance in the UDR before re-attempt is needed. When SMS delivery fails, the pre-maintained context (including failure reasons like UE reachability or memory capacity) is immediately available to trigger re-attempt, eliminating the need for complex real-time context reconstruction and enabling reliable re-delivery.
2Reliability
If SMS waiting context is maintained at UDR using HTTP requests, then SMS delivery re-attempt can be triggered appropriately, but the system requires additional HTTP request handling infrastructure
Solution Approach 1:
The patent applies universality by using the existing UDR and HTTP request infrastructure for multiple purposes: storing SMS waiting context, managing UE subscription data, and supporting re-attempt triggering. This multi-functional use of existing components avoids adding dedicated specialized systems, thereby limiting the increase in system complexity while achieving reliable SMS re-delivery.
3Adaptability or versatility
If the UDM entity maintains SMS waiting context at UDR, then re-attempt can be triggered based on UE reachability and memory availability, but additional data management operations are required
Solution Approach 1:
The patent implements feedback by continuously monitoring UE status (reachability, memory capacity) and using this feedback information stored in the SMS waiting context to dynamically trigger re-attempt decisions. The UDM entity queries UDR for updated UE status and uses this feedback to determine when re-delivery conditions are met, providing adaptable re-attempt triggering based on real-time network and device conditions.
Data Source
AI summary
Methods and apparatuses for short message service (SMS) delivery are disclosed. According to an embodiment, a unified data management (UDM) entity maintains a short message service (SMS) waiting context for a terminal device. The SMS waiting context is information related to a re-attempt of a mobile terminating (MT) SMS delivery from at least one SMS service center (SMS-SC) to the terminal device due to a failure of the MT SMS delivery.