Mobile Device Handoff Optimization via Packet Gateway Identifier Storage
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Solution Overview
Problem
Mobile devices are denied access to a 4G network when the packet gateway identifier is deleted from the subscriber profile database, preventing seamless handoffs from 3G to 4G networks due to lack of stored identifiers.
Innovation Solution
Triggering an authorization request for the packet gateway identifier to be sent to the subscriber profile database upon denial, ensuring the identifier is stored for subsequent handoff attempts, allowing the mobile device to access the 4G network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the packet gateway identifier is deleted from the subscriber profile database, then the mobile device is denied access to the 4G network, but this prevents seamless handoff from 3G to 4G networks
Solution Approach 1:
The system performs preliminary actions by triggering an authorization request that includes the packet gateway identifier when a binding update is received. This proactive approach ensures the identifier is stored in the subscriber profile database before a handoff is needed, preventing access denial and enabling seamless transitions between 3G and 4G networks.
2Ease of operation
If the packet gateway identifier is stored in the subscriber profile database, then the mobile device can access the 4G network seamlessly, but the database may contain outdated or incorrect identifiers
Solution Approach 1:
The system implements feedback by monitoring handoff attempts and triggering authorization requests that update the packet gateway identifier in the subscriber profile database. When a binding update is received during a handoff attempt, the system sends an authorization request that includes the current packet gateway identifier, ensuring the database contains accurate, up-to-date information for successful network access.
3Reliability
If an authorization request is triggered upon binding update, then the packet gateway identifier is ensured to be stored, but this increases signaling overhead and processing time
Solution Approach 1:
The authorization request is triggered as a preliminary action when a binding update is received during handoff attempts. This ensures the packet gateway identifier is stored in the subscriber profile database before the handoff completes, preventing access denial and enabling seamless transitions between 3G and 4G networks.
4Reliability
If the mobile device attempts handoff multiple times, then the identifier may eventually be stored, but this causes service interruption and user experience degradation
Solution Approach 1:
The system performs preliminary actions by triggering an authorization request that includes the packet gateway identifier when a binding update is received. This proactive approach ensures the identifier is stored in the subscriber profile database before a handoff is needed, preventing access denial and enabling seamless transitions between 3G and 4G networks.
Data Source
AI summary
The invention is directed to optimization of a seamless transition of a mobile device from a 3G eHRPD network to a 4G network in a failure scenario. The mobile device is authenticated and attached to the 3G eHRPD network. Upon the mobile device initiating a first handoff attempt to access and access the 4G network, the subscriber profile database is accessed to determine whether a packet gateway identifier is stored on the database. If the identifier is not stored on the database, the first handoff attempt of the mobile device to access the 4G network is denied. Upon being denied, the packet gateway is triggered to communicate the packet gateway identifier in an authorization request so that the identifier can be stored in the subscriber profile database. A subsequent attempt of the mobile device to handoff to the 4G network is allowed, as the packet gateway identifier is now stored on the database.