Terminal Device Cell Selection Weighting for Heterogeneous Network Interference
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Solution Overview
Problem
In heterogeneous network environments where macro and small cells use different frequency bands, existing technologies face challenges in enhancing cell throughput due to unique interference environments, leading to reduced traffic offloading to small cells and decreased network performance.
Innovation Solution
A terminal device with a measuring unit to assess signal quality from macro and small cells, a weight assigning unit to determine quality weights based on signal quality and number of small cells, and a cell selector to choose the optimal cell for access, thereby enhancing throughput by adjusting weights according to interference conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If macro cell and small cell use different frequency bands to avoid interference, then interference between cells is reduced, but cell throughput increases less than expected due to unique interference environment
Solution Approach 1:
The patent changes the parameter of signal quality evaluation by introducing a quality weight that modifies the measured signal received quality value of small cells. This weight is determined based on the number of small cells and their signal quality, effectively adjusting the selection criterion to account for the unique interference environment in heterogeneous networks using different frequency bands
Solution Approach 2:
The patent creates a virtual representation of the interference environment by calculating a quality weight that copies the effect of multiple small cell interferences onto a single evaluation metric. This allows the terminal to select small cells based on an adjusted quality measure that reflects the actual throughput potential in the heterogeneous network environment
2Ease of operation
If terminal selects cell based on measured signal received quality value only, then selection process is simple, but traffic offloading to small cells is reduced and network performance decreases
Solution Approach 1:
The patent performs preliminary calculation of the quality weight before cell selection, based on the number of small cells and their signal quality characteristics. This pre-computed weight is then applied to the measured signal received quality value, allowing the terminal to make an informed selection decision without complex real-time calculations during the actual selection process
Solution Approach 2:
The patent introduces a dynamic quality weight that adapts based on the number of small cells in the network and their signal quality. As the network environment changes (different numbers of small cells, varying signal qualities), the weight automatically adjusts, making the cell selection process adaptive to heterogeneous network conditions while maintaining operational simplicity
Data Source
AI summary
The present disclosure relates a terminal device capable of enhancing cell throughput in consideration of an interference environment created in a heterogeneous network environment where cells of different sizes which use different frequency bands coexist, and a method of operating the same.