WiFi-Assisted CBRS Sidelink Access Under Interference Constraints
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Solution Overview
Problem
Wireless telecommunications networks using Citizens Broadband Radio Service (CBRS) spectrum face interference limitations due to dynamic availability and shared usage among different tiers of users, impacting network performance and data transmission.
Innovation Solution
A system and method where a WiFi system assists mobile devices in establishing sidelink communications using CBRS spectrum by determining communication opportunities, obtaining spectrum allocation, and managing interference through a service provider system, ensuring minimal interference with other network users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CBRS spectrum is shared among multiple tiers of users, then spectrum utilization is improved, but interference between users increases
Solution Approach 1:
The patent introduces a Spectrum Access System (SAS) as an intermediary that manages CBRS spectrum allocation. The SAS receives communication requests from wireless communication systems, performs interference checks, and grants spectrum access only when interference thresholds are met. This mediator coordinates between multiple CBRS users, enabling shared spectrum access while maintaining acceptable interference levels through centralized control and dynamic authorization.
2Reliability
If interference checking is performed for every CBRS grant request, then interference protection is improved, but communication setup time increases
Solution Approach 1:
The system performs interference checks as a preliminary action before granting CBRS spectrum access. The SAS evaluates potential interference impacts on incumbent users and other CBRS users before authorizing a communication grant. By conducting this check in advance, the system ensures interference protection is established before communication begins, preventing harmful interference rather than correcting it afterward, thus maintaining both reliability and reasonable setup time.
3Productivity
If sidelink communication is established between mobile devices, then network offloading is improved, but spectrum availability becomes more critical
Solution Approach 1:
The patent implements dynamic spectrum access for sidelink communications. When mobile devices request sidelink communication, the SAS dynamically evaluates current CBRS spectrum availability, ongoing transmissions, and interference conditions. The system grants spectrum access only when conditions are favorable, allowing network offloading to proceed when CBRS resources are available while maintaining the ability to adapt to changing spectrum conditions. This dynamic approach enables network offloading benefits while responding to real-time spectrum availability.
Data Source
AI summary
Methods and systems for wireless local area network system assisted sidelink communications using Citizens Broadband Radio Service (CBRS) spectrum are described herein. A method includes receiving, from a mobile device by a wireless local area network system, a request for sidelink communications with another mobile device, sending, by the wireless local area network system to a service provider system, a request for CBRS spectrum when the sidelink communications is beneficial based on at least a known location of the mobile device and a location of the another mobile device, receiving, by the wireless local area network system from the service provider system, a sidelink communications information including a CBRS grant when an interference check passes, and sending, by the wireless local area network system to at least the mobile device, the sidelink communications information to enable establishment of the sidelink communications between the mobile device and the another mobile device.