Distributed Frequency Band Selection in Heterogeneous Cellular Networks
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Solution Overview
Problem
In heterogeneous cellular networks, the load on specific nodes increases when deciding frequency bands available to individual base stations for shared use between systems, leading to inefficiencies and potential bottlenecks.
Innovation Solution
An apparatus that distributes the load by having a frequency management system, a controller, and an information processing apparatus work together to decide and manage frequency bands available to macro and small cell base stations, allowing them to autonomously request and manage their frequency bands, reducing the burden on central nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency band decision is centrally managed by a specific node (communication control apparatus or TVWSDB), then frequency allocation can be coordinated, but the load on that specific node increases significantly
Solution Approach 1:
The patent segments the frequency band decision-making process by introducing distributed frequency band selection units in each base station. Instead of one central node making all decisions, each base station independently selects frequency bands based on local conditions and shared database information, dividing the computational load across multiple nodes while maintaining coordinated frequency allocation through the shared database
2Adaptability or versatility
If heterogeneous networks include both macro and small cell base stations, then network coverage and capacity improve, but the burden on central nodes for managing frequency bands increases extremely
Solution Approach 1:
The patent implements self-service by enabling each base station (macro and small cells) to autonomously select its frequency bands using local frequency band selection units. These units independently query the shared database, evaluate local interference conditions, and make frequency decisions without requiring complex centralized coordination, thereby supporting heterogeneous network deployment while reducing management complexity
Data Source
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AI summary
[Object] To make it possible to prevent a load from being concentrated on a specific node when a frequency band is shared between the cellular system employing the HetNet and other systems. [Solution] Provided is an apparatus, including: an acquiring unit configured to acquire band-related information that is related to a frequency band available to a macro cell base station of a cellular system among shared bands shared between the cellular system and another system and is provided from a controller for a plurality of macro cell base stations of the cellular system; and a control unit configured to decide a frequency band available to a small cell base station corresponding to the macro cell base station among the frequency bands available to the macro cell base station.