Base Station Controller Dynamic Channel Allocation
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Solution Overview
Problem
In wireless communication networks, especially in shared spectrum bands like the CBRS band, there is a challenge in efficiently managing wireless channels to avoid interference and ensure optimal bandwidth allocation among multiple base stations, particularly when higher priority users require spectrum access, leading to potential under-allocation for non-licensed users.
Innovation Solution
A base station controller dynamically monitors channel usage across multiple base stations and adjusts allocations by de-allocating channels from less loaded stations to those experiencing congestion, communicating with a Spectrum Access System to manage channel availability and prioritize higher bandwidth needs, ensuring continuous service while accommodating changes in load and priority user requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless channels are allocated statically to base stations, then channel allocation simplicity is maintained, but channel allocation efficiency deteriorates when load conditions change
Solution Approach 1:
The patent implements dynamic channel allocation where the base station controller continuously monitors channel usage and load conditions across multiple base stations, and reallocates channels based on current needs. This transforms the static allocation system into a dynamic one that adapts to changing conditions, improving efficiency while introducing controlled complexity through automated monitoring and reallocation mechanisms.
Solution Approach 2:
The system employs feedback mechanisms where base stations report channel usage and performance metrics to the base station controller, which then makes reallocation decisions based on this feedback. This closed-loop control system enables efficient resource allocation by continuously adjusting channel assignments according to actual network conditions and performance requirements.
2Adaptability or versatility
If channels are reallocated dynamically to accommodate higher priority users, then spectrum utilization is improved, but interference risk increases among base stations
Solution Approach 1:
The base station controller serves as an intermediary that coordinates channel allocations across multiple base stations. Before reallocating channels to accommodate priority users, the controller evaluates potential interference impacts and adjusts allocations to avoid conflicts. This intermediary coordination mechanism enables flexible spectrum usage while maintaining interference-free operations through centralized control and planning.
3Productivity
If channels are de-allocated from lightly loaded base stations, then channel allocation efficiency is improved, but service reliability may deteriorate if allocation decisions are incorrect
Solution Approach 1:
The system performs partial reallocation by de-allocating channels only from base stations that are confirmed to be lightly loaded, rather than making comprehensive changes across the entire network. This conservative approach allows efficiency improvements through targeted reallocation while minimizing the risk of service degradation, as the system makes incremental adjustments based on monitored load conditions rather than sweeping changes.
Data Source
AI summary
According to one configuration, a base station controller monitors use of multiple wireless channels amongst multiple wireless base stations operating in a wireless network environment. In response to detecting under allocation of wireless channels between a first wireless base station and a first group of communication devices, the base station control allocates a supplemental wireless channel to the first wireless base station. In one embodiment, the base station controller de-allocates a wireless channel from a second wireless base station and assigns the de-allocated wireless channel to the first wireless base station as the supplemental wireless channel. The base station controller then transmits a channel allocation communication to the first wireless base station, the channel allocation communication indicating an identity of the supplemental wireless channel allocated for use by the first wireless base station.