ACDC-Aware Cell Selection for Mobile Communication Devices
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Solution Overview
Problem
Current LTE technologies prioritize cells with higher priority levels for camping, even if Application-specific Congestion Control for Data Communication (ACDC) is not enabled, leading to limited services due to choosing cells with higher priority but ACDC disabled, resulting in negative user experience.
Innovation Solution
A mobile communication device and method that determine if ACDC is enabled in cells through system information broadcast, and if not, select or reselect to a cell with a lower priority level where ACDC is enabled, prioritizing cells with ACDC to ensure better service availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE selects a cell with higher priority level according to conventional cell selection procedures, then the cell priority requirement is satisfied, but the service availability deteriorates due to ACDC being enabled causing access control
Solution Approach 1:
The patent changes the cell selection parameter from solely priority level to a composite criterion that includes both priority level and ACDC enablement status. The UE is configured to prioritize cells where ACDC is not enabled, even if they have lower priority levels, thereby resolving the contradiction between maintaining simple selection criteria and ensuring service availability.
2Reliability
If the UE camps on a cell with higher priority level where ACDC is enabled, then the cell priority requirement is satisfied, but the user experience deteriorates due to limited services
Solution Approach 1:
The patent modifies the cell selection parameter to include ACDC enablement status alongside priority level. The UE is instructed to prefer cells where ACDC is not enabled, even with lower priority levels, thereby preventing the harmful effect of limited services and poor user experience while still considering priority levels.
3Ease of operation
If the UE follows conventional cell selection based on priority levels, then the selection process remains simple, but the adaptability deteriorates regarding ACDC-aware access control
Solution Approach 1:
The patent extends the cell selection parameters to include both priority level and ACDC enablement status. This allows the system to maintain a relatively simple selection process while adapting to ACDC requirements by adding one more consideration criterion, thereby improving adaptability without significantly complicating the selection mechanism.
Data Source
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AI summary
A mobile communication device including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network comprising a plurality of cells. The controller determines whether an Application-specific Congestion control for Data Communication (ACDC) has not been enabled in one of the cells according to system information broadcasted by the cells, and in response to the ACDC not having been enabled in one of the cells, select or reselect to the cell via the wireless transceiver even when the cell has a lower priority level than another cell in which the ACDC has been enabled.