Initial Attach Prioritization via SLF Subscriber Priority Lookup
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Solution Overview
Problem
Existing 4G implementations lack a method for prioritizing priority subscribers during initial attach procedures, leading to equal difficulties for priority users in connecting to the network during network congestion or overload.
Innovation Solution
Implementing a subscriber locator function (SLF) with additional functionality to perform subscriber priority inquiries, sharing priority information with network components like MME or CSCF, and leveraging the home subscriber server (HSS) to assign priority during initial attach procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing 4G implementations are used without initial attach prioritization, then network operations are simple and device complexity is low, but priority subscribers cannot be prioritized during network congestion leading to equal difficulties in connecting
Solution Approach 1:
The system performs preliminary actions by retrieving and storing subscriber priority information in the HSS database before the initial attach procedure occurs. When a priority subscriber attempts to attach, the MME queries the HSS for pre-stored priority information, enabling immediate prioritization without adding complex real-time decision-making to the attach procedure itself.
Solution Approach 2:
The HSS acts as an intermediary between the MME and priority subscriber information. The MME queries the HSS to obtain subscriber priority levels, and the HSS returns this information enabling the MME to prioritize attach requests without the MME needing to directly manage complex subscriber profile databases.
2Productivity
If priority prioritization is implemented during initial attach, then priority subscribers receive guaranteed service during congestion, but the initial attach procedure becomes more complex requiring additional database lookups and information sharing
Solution Approach 1:
Subscriber priority information is retrieved and stored in the HSS database in advance, before any attach procedures occur. This preliminary preparation allows the MME to quickly query and act on priority information during congestion without performing complex real-time analysis or multiple database queries.
Solution Approach 2:
The system implements feedback by having the MME query the HSS for subscriber priority information and using this returned information to make attach prioritization decisions. The HSS provides feedback about subscriber priority levels, enabling the MME to adjust its attach handling accordingly.
Data Source
AI summary
Systems, methods and devices are provided for subscriber prioritization upon initial attachment. Methods include receiving notification of an initial attach request from a wireless device at a subscriber locator function (SLF) and performing a database lookup at the SLF. Methods further include obtaining a subscriber priority from the database lookup and transmitting the subscriber priority from the SLF to a network component responding to the initial attach request from the wireless device.