Dynamic Spectrum Allocation in CBRS Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in allocating Citizens Broadband Radio Service (CBRS) spectrum, particularly for low-bandwidth applications like IoT services, as existing systems allocate fixed 10 MHz channels, leading to spectrum wastage for devices requiring less than 10 MHz, such as Cat-M1, Cat-M2, and narrow band IoT.
Innovation Solution
The proposed solution involves modifying the CBSD-SAS call flow and registration data specifications to enable dynamic configuration of CBRS spectrum grants, allowing for non-broadband spectral region allocation, such as 1.4 MHz and 200 kHz, by using a Spectrum Access Server (SAS) to manage and slice available broadband spectral regions into smaller, appropriately sized channels for non-broadband CBSDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed 10 MHz channel allocation is used for CBRS spectrum, then broadband services can be supported, but spectrum wastage occurs for low-bandwidth applications like IoT services
Solution Approach 1:
The patent segments the fixed 10 MHz channel into smaller sub-channels of varying bandwidths (e.g., 1.4 MHz, 5 MHz, 200 kHz) to match the specific requirements of different IoT services. This segmentation allows the spectrum to be divided and allocated in granular units rather than fixed blocks, thereby reducing wastage while maintaining support for broadband services.
Solution Approach 2:
The patent introduces dynamic spectrum allocation where the SAS can adaptively assign different bandwidth sizes based on the specific needs of each CBSD and service type. This dynamic approach allows the system to transition from static 10 MHz allocations to flexible, demand-driven spectrum assignment, improving adaptability while minimizing waste.
2Ease of operation
If 10 MHz spectrum chunks are allocated to IoT services requiring less bandwidth, then spectrum allocation is simplified, but spectrum efficiency decreases
Solution Approach 1:
By segmenting 10 MHz chunks into smaller allocable units, the system maintains the simplicity of chunk-based allocation at the macro level while enabling fine-grained distribution at the micro level. This allows efficient spectrum utilization for IoT services without significantly complicating the overall allocation process.
Solution Approach 2:
The patent changes the bandwidth parameter from fixed 10 MHz to variable sizes (1.4 MHz, 5 MHz, 200 kHz) based on service requirements. This parameter flexibility allows the system to optimize spectrum efficiency for different applications while maintaining manageable allocation procedures through standardized bandwidth options.
3Device complexity
If minimum 10 MHz channel size is enforced, then channel management is simplified, but low-bandwidth IoT applications cannot be efficiently supported
Solution Approach 1:
The patent segments the minimum channel unit into smaller bandwidth options while maintaining a standardized channel structure. This allows the system to support diverse radio types (Cat-M1, Cat-M2, NB-IoT) with different bandwidth needs without fundamentally changing the channel management architecture, thus balancing simplicity and adaptability.
Solution Approach 2:
The patent creates a universal channel allocation framework that can accommodate multiple radio types and service categories through a single flexible mechanism. By defining standardized bandwidth options that work across different CBSD types, the system achieves multi-functionality without increasing management complexity.
Data Source
AI summary
Various embodiments comprise systems, methods, architectures, mechanisms and apparatus for enabling dynamic configuration of CBSD devices with CBRS spectrum grants defined/sized using enhanced SAS channel assignment capabilities supporting low bandwidth channels/applications (e.g., IoT services) in the shared spectrum while minimizing spectrum wastage. Existing CBSD-SAS call flow message exchange and registration data specifications are modified in accordance with various embodiments to provide support for radio types having spectrum requirements less than the nominal minimum channel size.