Multi-Carrier Cell Selection for Shared RF Antenna Throughput
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Solution Overview
Problem
In multi-SIM user equipment, a single RF antenna shared by both SIMs leads to reduced data throughput due to occupancy by other SIMs, and existing systems cannot select cells corresponding to multi-carrier frequencies, resulting in suboptimal performance in areas where single and multi-carrier HSPA/LTE/GSM/CDMA technologies coexist.
Innovation Solution
A method for cell selection by user equipment (UE) that maintains a database of multi-carrier availability status for various frequencies, determining the availability of candidate cells with multi-carrier configurations, and selecting them when performance metrics exceed a predefined threshold, thereby prioritizing multi-carrier configurations over single-carrier ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single RF antenna is shared by both SIMs in multi-SIM user equipment, then device complexity is reduced, but data throughput deteriorates due to RF occupancy by other SIMs
Solution Approach 1:
The UE performs preliminary actions by maintaining a database of multi-carrier availability status for multiple frequencies before actual cell selection. This pre-gathering of information enables the UE to quickly identify and select multi-carrier frequencies when needed, improving throughput without requiring complex real-time analysis during connection establishment
2Ease of operation
If existing systems select cells based on conventional criteria, then cell selection simplicity is maintained, but throughput deteriorates in areas where multi-carrier frequencies are available
Solution Approach 1:
The invention changes the cell selection parameter by introducing multi-carrier availability status as a new criterion. The UE modifies its cell selection behavior by checking whether candidate cells operate on multi-carrier frequencies (where multiple carrier configurations are available) and prioritizing such cells, thereby improving throughput while maintaining operational simplicity through database-driven decision-making
3Device complexity
If the UE cannot identify multi-carrier frequency availability, then system complexity is reduced, but throughput deteriorates when multi-carrier configurations are available in the geographical area
Solution Approach 1:
The UE performs self-service by autonomously maintaining and querying its own database of multi-carrier availability status. The device independently determines whether candidate cells operate on multi-carrier frequencies using its stored information, eliminating the need for complex external identification mechanisms while enabling throughput improvement through informed cell selection decisions
Data Source
AI summary
A user equipment (UE) and a method of cell selection by a UE are provided. The method includes maintaining a database for storing a multi-carrier availability status for a plurality of frequencies, wherein each frequency includes at least one of a multi-carrier configuration and a single-carrier configuration; determining whether a candidate cell corresponding to the multi-carrier configuration is available based on the multi-carrier availability status; and selecting the candidate cell corresponding to the multi-carrier configuration when a performance metric of the candidate cell is greater than a pre-defined threshold.