Channel Selection via Neighboring Cell Interference Weighting
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Solution Overview
Problem
Conventional wireless communication systems face challenges in indoor coverage due to channel characteristics like fading and multipath, leading to poor user experience, and there is a need for a dynamic channel selection method that minimizes interference and maximizes co-channel operation among access points to improve mobility management.
Innovation Solution
The method involves retrieving user equipment reports to compute received signal strength indications and reference signal received power, applying cumulative distribution functions, and calculating utility values to autonomously select the best communication channel, balancing interference minimization and co-channel operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional channel assignment methods are used, then channel selection is simple, but interference from non-LTE sources and co-channel interference increases
Solution Approach 1:
The patent transforms the channel selection problem by changing the parameters used for evaluation. Instead of simple channel availability, it introduces composite parameters including non-LTE interference measurements (from WiFi and other sources), co-channel interference from neighboring LTE access points, and utility function calculations that weigh multiple factors. This allows the system to select channels with optimal interference characteristics while maintaining manageable complexity through structured measurement and calculation procedures.
2Object-affected harmful factors
If access points use different channels to minimize interference, then interference is reduced, but the cost of inter-frequency measurement increases
Solution Approach 1:
The patent implements preliminary action by having access points and user equipment perform channel measurements and report channel conditions before the actual channel selection decision is made. User equipment measures and reports non-LTE interference levels on various channels in advance, and neighboring access point information is collected beforehand. This preliminary data collection enables the serving access point to make informed channel selection decisions without requiring real-time inter-frequency measurements during handover or connection establishment, thereby reducing measurement time and resource consumption.
3Productivity
If dynamic channel selection is implemented, then interference is minimized and performance improves, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where user equipment continuously measures and reports channel conditions, including non-LTE interference levels and received signal strength indicators, back to the serving access point. The access point uses this feedback information to dynamically adjust channel selections. This feedback-driven approach enables the system to adapt to changing interference conditions in real-time, improving performance while managing complexity through standardized measurement and reporting procedures that build upon existing LTE measurement frameworks.
Data Source
AI summary
Provided are methods and apparatus for selecting a channel to use for communicating. The methods and apparatus select a channel having the least interference and minimize a number of different channels in use. For example, a provided method includes calculating a utility value for each channel in a plurality of channels by weighting, based on a number of the neighborhood small cells (NSC) using each channel in the plurality of channels, both a respective modified non-NSC received signal strength indication (RSSI) and a respective modified reference signal received power (RSRP). The non-NSC RSSI is calculated by subtracting a respective RSRP from a total RSSI. The respective modified RSRP for each channel in the plurality of channels is calculated by applying the respective RSRP to a cumulative distribution function. The channel having the highest or the lowest utility value is chosen as the channel to use for the communicating.