Dynamic Carrier Aggregation in Multi-Beam Antenna Systems
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Solution Overview
Problem
Current small-cell wireless cellular deployments face challenges in addressing variable capacity demand due to high costs, large form factors, and inefficient beamforming technologies, which are not suitable for urban morphologies and user distributions.
Innovation Solution
A configurable multi-beam antenna system architecture with a compact base transceiver unit and daisy-chained RF system, allowing dynamic carrier aggregation and mapping of component carriers to multiple antenna groups, enabling adaptable coverage patterns responsive to location and capacity demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional distributed RAN architecture with macro-cell deployments is used, then network capacity can be steered to specific areas, but the system becomes too expensive and complex for small-cell deployments
Solution Approach 1:
The patent changes the operational parameters by enabling dynamic carrier aggregation and beamforming configurations in small-cell systems, allowing the same hardware to adapt its capacity steering capabilities based on real-time demand conditions without requiring macro-cell infrastructure
Solution Approach 2:
The base transceiver unit is designed with multi-functional capabilities to perform both carrier aggregation and beamforming operations, allowing a single device to handle multiple capacity steering functions that previously required separate macro-cell infrastructure components
2Adaptability or versatility
If multi-beam antennas with advanced full-dimension digital beamforming are deployed, then coverage for multiple use-case scenarios can be achieved, but the form factor becomes too large for small-cell installations
Solution Approach 1:
The antenna system is segmented into multiple independent beamforming groups that can be selectively activated, allowing the physical antenna structure to remain compact while providing multi-scenario coverage by enabling different beam combinations as needed
Solution Approach 2:
The beamforming configuration is made dynamic through software control, allowing the same physical antenna array to reconfigure its radiation patterns in real-time to address different use-case scenarios without physical reconfiguration or expansion
3Productivity
If carrier aggregation is implemented to address capacity demand, then data rates can be increased, but the mapping to antenna beams becomes inefficient for variable demand patterns
Solution Approach 1:
The system implements feedback mechanisms that monitor capacity demand patterns and dynamically adjust the mapping between component carriers and antenna beams, ensuring that carrier aggregation resources are continuously optimized to match variable demand conditions
Solution Approach 2:
The carrier-to-beam mapping configuration is made dynamic rather than static, allowing the system to reconfigure which component carriers are transmitted through which antenna beams based on real-time capacity demand measurements and predictions
Data Source
AI summary
A multi-beam antenna system, apparatus and method for dynamic carrier aggregation to multi-beam antenna mapping in radio access networks, including small-cell deployments, is disclosed. Apparatus comprises a compact base transceiver unit with integrated multi-beam antenna comprising antenna groups configurable for operation in a plurality of modes, with one or more selected antenna groups enabled, for different use-case scenarios. The base transceiver unit comprises a daisy-chained radio-frequency (RF) system wherein one baseband processor feeds multiple RF transceivers; each RF transceiver front end comprises a software configurable isolation module through which each RF front end is interlinked to previous and next RF front ends to enable dynamic routing of TX/RX data streams through the daisy chain, e.g. routing a transmission data stream from any RF transceiver to any one of the antenna groups or multiple antenna groups, routing a received data stream from one or multiple antenna groups to any RF transceiver, and for contiguous or non-contiguous carrier aggregation.