Segmented Channel Access for Shared Band Wireless Nodes
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in shared frequency band utilization, particularly in the Citizens Broadband Radio Service (CBRS), where non-incumbent users must register with a spectrum access controller to access channels, leading to delays and limited flexibility, as they are restricted from using channels assigned to incumbent users without proper registration.
Innovation Solution
Implementing a method where wireless nodes can operate on unrestricted channels without registration and obtain permission to use restricted channels through registration, allowing for flexible spectrum usage while ensuring incumbent user protection by distinguishing between restricted and unrestricted channels based on geographic location and protection zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-incumbent users must register with a spectrum access controller to access channels, then incumbent user protection is ensured, but access delay increases and flexibility is reduced
Solution Approach 1:
The patent segments the shared frequency band into two distinct types of channels: restricted channels and unrestricted channels. Restricted channels are reserved for incumbent users and require registration for access, while unrestricted channels are available for immediate access by non-incumbent users without registration. This segmentation allows the system to simultaneously protect incumbent users on restricted channels while enabling rapid access to unrestricted channels, thereby resolving the contradiction between reliability and access delay.
2Ease of operation
If non-incumbent users must register with a spectrum access controller, then channel access control is improved, but operational flexibility deteriorates
Solution Approach 1:
The patent divides the spectrum access mechanism into two pathways: a controlled pathway for restricted channels requiring registration with the spectrum access controller, and an autonomous pathway for unrestricted channels allowing immediate access without registration. This dual-pathway segmentation enables the system to maintain strong access control where needed while providing flexibility where incumbent protection is not required, resolving the contradiction between ease of operation and adaptability.
3Reliability
If all channels are restricted requiring registration, then incumbent protection is maximized, but spectral efficiency decreases
Solution Approach 1:
The patent segments the available spectrum into restricted channels for incumbent protection and unrestricted channels for efficient utilization by non-incumbent users. By allowing unrestricted access to portions of the spectrum where incumbent users are not present or protected, the system maximizes spectral efficiency while maintaining adequate protection for incumbent users on restricted channels, thereby resolving the contradiction between reliability and productivity.
Data Source
AI summary
According to an example embodiment, a method may include sending, by a wireless node to a spectrum access controller, a request, including information indicating at least a location of the wireless node; receiving, by the wireless node from the spectrum access controller, information indicating at least one restricted channel for the wireless node and indicating at least one unrestricted channel for the wireless node within a shared frequency band; wherein the wireless node is prohibited from transmitting signals via the at least one restricted channel if the wireless node is in an unregistered state with respect to the spectrum access controller; and wherein the wireless node is permitted to transmit signals via the at least one unrestricted channel regardless whether the wireless node is in the registered state or the unregistered state with respect to the spectrum access controller.