UE Multi-Carrier Access Control via Frequency Band Switching
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Solution Overview
Problem
Current mobile communication systems operating multiple frequency bands lack a defined method for user equipment (UE) to intelligently switch between frequency bands when access attempts fail due to overloads or errors, leading to prolonged service disruptions.
Innovation Solution
The UE apparatus includes an access history identification unit, a search unit, and an access control unit that identify access failures in a first frequency band, receive parameters for accessibility in a second frequency band, and search for and access the LTE wireless communication system through the second frequency band, thereby increasing service access rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs access attempts only in the current frequency band, then the device complexity is low, but the service access rate deteriorates when access failures occur due to overloads or errors
Solution Approach 1:
The UE pre-configures access fail counters for multiple frequency bands before access attempts. When access fails in the current frequency band, the UE can immediately switch to another frequency band based on pre-configured parameters, avoiding prolonged service disruption and improving access reliability without adding complex real-time decision mechanisms
Solution Approach 2:
The patent extends the access control mechanism from a single frequency band to multiple frequency bands by introducing frequency band as an additional dimension. The UE maintains access fail counters and access parameters for multiple frequency bands, allowing it to switch dimensions (frequency bands) when access fails in the current band, thereby improving service access rate without significantly increasing device complexity
2Reliability
If the UE switches to another frequency band upon access failure, then the service access rate improves, but the device complexity increases due to multiple frequency band management
Solution Approach 1:
The access fail counter mechanism is designed to be universal across multiple frequency bands. The UE uses the same counter and parameter management logic for all configured frequency bands, allowing the system to handle multiple frequency bands with a single, unified access control mechanism rather than requiring separate mechanisms for each band, thus limiting the increase in device complexity
Solution Approach 2:
The patent manages multiple frequency bands by configuring and changing parameters (access fail counters, access parameters) for each band. When access fails in one band, the UE changes the active frequency band parameter and continues access attempts in another band. This parameter-based management approach allows multi-frequency band operation without requiring complex structural changes to the device
3Ease of operation
If the UE continuously retries access in the same frequency band, then the ease of operation is maintained, but the loss of time increases due to prolonged service disruptions
Solution Approach 1:
The UE pre-configures access parameters and fail counters for multiple frequency bands before access attempts. When access fails in the current band, the UE can immediately switch to another pre-configured band without prolonged delays, reducing service disruption time while maintaining automatic operation through pre-planned frequency band switching
Solution Approach 2:
Instead of continuously retrying access in the same frequency band (which wastes time), the UE skips to another frequency band when access fails. This skipping mechanism allows the UE to rush through the access process by quickly moving to alternative frequency bands, thereby reducing the time lost due to access failures while maintaining simple automatic operation
Data Source
AI summary
Disclosed is a User Equipment (UE) accessing a Long Term Evolution (LTE) wireless communication system operating a Multi-Carrier (MC). The UE includes: an access history identification unit, when the UE accesses the LTE wireless communication system in a first frequency band on which the UE is camped, identifies whether the UE stores an access fail history of the first frequency band; a search unit, when the UE stores the access fail history of the first frequency band, receives a parameter indicating an accessibility to the LTE wireless communication system in a second frequency band, and searches for the second frequency band based on the received parameter; and an access control unit, when the LTE wireless communication system is found in the second frequency band based on a result of the search, accesses the LTE wireless communication system through the second frequency band.