Radio Access Technology Attachment Maintenance for Network Signaling Reduction
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Solution Overview
Problem
In compound LTE-WCDMA networks, devices face inefficiencies when switching between packet-switched and circuit-switched services due to frequent changes in radio access technology, leading to unnecessary signaling and delays.
Innovation Solution
An apparatus and method that determine the commencement of a service access session, triggering a network procedure to change from a first radio access technology to a second, while transmitting settings messages to maintain attachment to the second technology, thereby preventing unnecessary transitions and signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device frequently switches between packet-switched and circuit-switched radio access technologies to access different services, then service accessibility is improved, but signaling overhead and access delays increase
Solution Approach 1:
The device performs preliminary actions by maintaining attachment to the circuit-switched radio access technology (WCDMA) in advance before actual service access is needed. By keeping the attachment active during packet-switched service usage, the device prepares the circuit-switched connection path beforehand, so that when circuit-switched services are required, the device can immediately access them without undergoing time-consuming attachment procedures. This preliminary maintenance of attachment resolves the contradiction by eliminating access delays while preserving service accessibility.
2Adaptability or versatility
If the device switches radio access technology to access circuit-switched services, then service functionality is improved, but signaling overhead increases
Solution Approach 1:
The device applies continuity of useful action by maintaining continuous attachment to the circuit-switched radio access technology (WCDMA) even while primarily using packet-switched services (LTE). Instead of repeatedly establishing and releasing circuit-switched attachments based on service needs, the device keeps the attachment continuously active. This eliminates the need for repeated signaling to establish connections, thereby reducing signaling overhead while maintaining full service functionality for both packet-switched and circuit-switched services.
3Productivity
If the device maintains attachment to packet-switched network for data services, then data service efficiency is improved, but access to circuit-switched services requires additional network procedures
Solution Approach 1:
The device performs preliminary action by establishing and maintaining attachment to the circuit-switched radio access technology (WCDMA) in advance, while simultaneously utilizing packet-switched services (LTE) for data transmission. By having the circuit-switched attachment already in place before needing circuit-switched services, the device avoids the complexity of additional network procedures such as service request signaling, authentication, and connection setup that would otherwise be required when switching from packet-switched to circuit-switched services. This resolves the contradiction by maintaining data service efficiency through LTE while eliminating procedural complexity for circuit-switched access.
Data Source
AI summary
In accordance with an example embodiment of the present invention, there is provided an apparatus, comprising at least one processing core configured to determine that a service access session has commenced, the at least one processing core configured to cause a network procedure to be triggered to cause attachment of the apparatus to change from a first radio access technology to a second radio access technology, and a transmitter configured to cause, during the service access session, a first settings message and a second settings message to be transmitted to a network in accordance with the second radio access technology, wherein the first settings message comprises an indication that the service access session is in progress.