UE Queuing on Current Frequency Carrier
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Solution Overview
Problem
In wireless communications systems, the existing queuing operations during cell update procedures fail when the serving frequency carrier is congested, leading to potential failures in queuing the UE, especially when nearby frequency carriers are also congested or unavailable.
Innovation Solution
A method that manages the queuing operation by queuing the UE at its current frequency carrier and maintaining the UE in the same paging state, using a CELL UPDATE CONFIRM message with a wait time IE and excluding the Frequency info IE, allowing the UE to reinitiate the cell update procedure after a waiting period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UTRAN queues the UE on another frequency carrier when the current serving frequency carrier is congested, then the queuing operation can be performed, but the operation fails when nearby frequency carriers are also congested or unavailable
Solution Approach 1:
The patent inverts the traditional queuing approach by allowing the UE to queue on the current congested frequency carrier instead of forcing a switch to another carrier. This reverse approach eliminates the problem of unavailable alternative carriers while maintaining the queuing function, directly resolving the technical contradiction between reliability and adaptability.
Solution Approach 2:
The UE maintains its paging state and continues monitoring the current frequency carrier for queue management messages, enabling self-service queuing without requiring network-directed frequency switching. This self-service mechanism ensures the queuing operation can proceed even when alternative carriers are unavailable, improving reliability without sacrificing adaptability.
2Productivity
If the UE switches to another frequency carrier for queuing, then congestion on the current carrier is avoided, but the UE may lose connection when no other carrier is available
Solution Approach 1:
Instead of switching carriers to avoid congestion, the patent allows the UE to remain on the current carrier and queue there. This inverted approach maintains connection reliability while still managing congestion through the wait time mechanism, eliminating the risk of connection loss during carrier switching.
Solution Approach 2:
The network provides a wait time indicator in the CELL UPDATE CONFIRM message that cushions the UE against immediate retransmission attempts on a congested carrier. This beforehand cushioning allows the UE to back off for a controlled period, reducing congestion impact while maintaining connection reliability without requiring carrier switching.
3Ease of operation
If the UTRAN includes Frequency info IE in the CELL UPDATE CONFIRM message, then the UE can switch to another carrier for queuing, but the operation becomes complex and fails when no alternative carrier exists
Solution Approach 1:
The patent extracts the Frequency info IE from the CELL UPDATE CONFIRM message, eliminating the complexity of carrier switching logic. By removing this element, the message structure becomes simpler while the queuing operation remains effective through the wait time mechanism alone, resolving the contradiction between operational flexibility and device complexity.
Solution Approach 2:
The patent inverts the traditional approach by not providing frequency information to the UE. Instead of enabling carrier switching through Frequency info IE, the system enables queuing on the current carrier through the wait time IE alone, simplifying the message structure while maintaining operational effectiveness.
Data Source
AI summary
A method of managing a queuing operation of a user equipment, known as UE, in a paging state for a network terminal of a wireless communications system includes, through a cell update procedure, queuing the UE at a frequency carrier where the UE currently camps and keeping the UE in the paging state (402).