Dynamic Spatial Layer Association in Millimeter-Wave FWA Beams
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Solution Overview
Problem
Existing wireless communication systems in the millimeter-wave frequency range face challenges with static association of spatial layers to beams, leading to limited flexibility and increased complexity, particularly in Fixed Wireless Access networks, where dynamic association of layers to users is not effectively addressed.
Innovation Solution
A method and system that allow for dynamic association of spatial layers to beams, enabling flexible association in multi-antenna systems, which improves user throughput and extends coverage by using a base station with a baseband processor subsystem and RF frontend capable of handling multiple signals, and a beam switching subsystem to manage multiple beams and users efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static association of spatial layers to beams is used, then device complexity is reduced, but adaptability and user throughput are limited
Solution Approach 1:
The patent implements dynamic association of spatial layers to beams based on real-time channel conditions and user requirements. The baseband processor can flexibly assign different numbers of layers to different beams depending on traffic demand, channel quality, and user location, transitioning from static to dynamic configuration to resolve the contradiction between adaptability and complexity
Solution Approach 2:
The system changes the parameter of layer-to-beam association from fixed to variable based on operating conditions. By adjusting the number of layers assigned to each beam dynamically according to channel state information and user throughput requirements, the system achieves better adaptability while managing complexity through intelligent resource allocation algorithms
2Productivity
If independent baseband processor subsystems are allocated to each beam, then user throughput is maximized, but device complexity increases significantly
Solution Approach 1:
The patent merges multiple beam processing functions into a single shared baseband processor subsystem. Instead of having independent baseband processors for each beam, one baseband processor handles multiple beams by dynamically configuring layer associations, thereby reducing hardware complexity while maintaining the throughput performance through efficient software-defined resource allocation
Solution Approach 2:
The baseband processor is designed with universal functionality to serve multiple beams simultaneously. It can dynamically allocate processing resources to different beams based on demand, making a single processor subsystem capable of performing the functions that would otherwise require multiple dedicated processors, thus improving productivity without proportionally increasing complexity
3Device complexity
If hybrid beamforming techniques are used, then device complexity is reduced, but adaptability in beam steering is limited
Solution Approach 1:
The patent introduces dynamic beam steering capabilities in hybrid beamforming systems by implementing baseband processing that can adaptively adjust beam directions and associations. The system dynamically configures which spatial layers are associated with which beams based on real-time channel conditions, adding adaptability to the otherwise static hybrid beamforming architecture without requiring full digital beamforming complexity
Solution Approach 2:
The patent segments the beamforming function into digital baseband processing stage and analog RF beamforming stage. The baseband processor handles dynamic layer-to-beam association and beam steering control, while the RF stage handles analog phase control. This segmentation allows hybrid beamforming to achieve better adaptability through intelligent baseband processing while maintaining the complexity benefits of analog beamforming at the RF stage
Data Source
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AI summary
Method and system to dynamically associate spatial layers to beams in a FWA network operating in the millimeter-wave frequency range. A base station (101) and a CPE (102) are willing to wirelessly transmit and receive data through a wireless channel of said FWA network, said base station (101) having beamforming capabilities henceforth generating multiple wireless beams (103). The base station (101) performs all baseband wireless functions related for creating, keeping and managing the connections between the base station (101) and the CPE (102) at baseband level, wherein information is handled in the form of up to M spatial layer signals, and with no built-in capabilities for creation, detection or management of the beams (103). The base station (101) also performs all necessary RF functions at millimeter-wave frequencies, including beamforming and conversion from complex baseband signals to RF signals and vice versa, and also couples the RF signals to said wireless channel.