Femto Access Point Self-Discovery for Interference Management
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Solution Overview
Problem
Femto cell networks face challenges in dense areas due to interference between access points, leading to reduced coverage and capacity, and existing solutions struggle to balance coverage and interference effectively.
Innovation Solution
Implementing a self-discovery method for femto cells within a local network, where access points identify and broadcast their identities via LAN and radio interfaces, allowing for automatic handover and optimal configuration without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transmission power of femto access points is increased to improve coverage, then network coverage is improved, but interference between adjacent femto cells increases
Solution Approach 1:
The patent implements dynamic transmission power adjustment where each femto access point continuously monitors signal quality and automatically adjusts its transmission power level. This allows the system to adapt power levels in real-time based on actual interference conditions and coverage requirements, resolving the contradiction between maintaining coverage and minimizing interference.
Solution Approach 2:
The patent establishes a feedback mechanism where femto access points exchange information about signal quality, interference levels, and coverage status. This feedback loop enables each access point to adjust its operation based on network conditions, allowing optimal balance between coverage expansion and interference reduction through coordinated power control.
2Object-generated harmful factors
If transmission power of femto access points is reduced to minimize interference, then interference between femto cells is reduced, but network coverage is reduced
Solution Approach 1:
The system dynamically adjusts transmission power based on real-time network conditions, allowing femto access points to operate at lower power levels when interference is minimal while increasing power when coverage expansion is needed. This dynamic adaptation enables the system to achieve both low interference and adequate coverage without fixed power limitations.
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on network conditions, allowing each femto access point to optimize its power level according to local interference patterns and coverage requirements. This parameter adjustment enables the system to resolve the contradiction between interference reduction and coverage maintenance.
3Reliability
If manual configuration of femto access points is used to optimize coverage and interference, then coverage and interference management is improved, but deployment complexity and time increase
Solution Approach 1:
The patent implements self-service configuration where femto access points automatically discover each other, exchange configuration parameters, and adjust their operation without manual intervention. The system performs self-optimization of coverage and interference management through automated algorithms, eliminating the need for complex manual deployment while maintaining optimal network performance.
Solution Approach 2:
The system incorporates automated feedback mechanisms that continuously monitor network conditions and automatically adjust femto access point configurations. This automated feedback loop replaces manual configuration processes, reducing deployment complexity while maintaining reliable coverage and interference management through continuous self-optimization.
4Area of stationary object
If multiple femto access points are deployed in dense areas to improve coverage, then network coverage is improved, but interference between access points increases
Solution Approach 1:
The patent implements dynamic power control for each femto access point in dense deployments, allowing individual power level adjustment based on local interference conditions. This enables the system to support multiple access points in dense areas while maintaining manageable interference levels through coordinated dynamic power management.
Solution Approach 2:
The system applies local quality control by allowing each femto access point to optimize its transmission parameters according to its specific local environment and interference conditions. This localized optimization enables dense deployments with manageable interference by tailoring each access point's operation to its specific context rather than using uniform settings.
Data Source
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AI summary
The invention relates to a method for configuring a local cellular network including a plurality of access points. According to the invention, such a method includes, every time a new access point belonging to said plurality of access points is activated: a step (300) of identifying at least one access point adjacent to said newly activated access point from an identification message broadcast by said access point adjacent to a set of active access points of said plurality of access points, and when said identification message has been received over a LAN interface of said newly activated access point, a step (303) of said newly activated access point broadcasting an identification message containing the identity thereof to said set of active access points.