WInnForum Approves New CBRS Specifications
Thursday, January 23, 2020 | Comments

The Wireless Innovation Forum (WInnForum) approved a new Release 2 specification defining enhancements to the baseline Citizens Broadband Radio Service (CBRS) operational and functional requirements. The specification defines optional features and functionality that can be incorporated at any time, with special focus on supporting specific vertical markets and their deployments.

WInnForum’s Spectrum Sharing Committee CBRS Functional and Operational Requirements Working Group, chaired by Andrew Clegg of Google, prepared the specification.

“Our new release of the CBRS standards opens the way for substantial additional innovation in the CBRS band,” said Clegg. “Now, anyone can rapidly add features to CBRS simply by contributing a suitable appendix to the Release 2 specification, and pending committee approval and appropriate certification requirements, the feature is ready for adoption by CBRS users, equipment manufacturers, and spectrum access system (SAS) administrators, on demand.”

To address backward compatibility with the WInnForum Release 1 baseline standards, the only mandatory feature in Release 2 for a SAS or CBRS device (CBSD) is to support the feature capability exchange between SASs and CBSDs.

Based on the Release 2 additions, emerging technologies can be considered and implemented. Single frequency group is a set of CBSDs that require a common radio frequency assignment and reassignment when frequency reassignment is necessary or preferred. The specification also outlines requirements on how CBSD two-dimensional antenna patterns should be specified and used by the SAS to calculate CBSD antenna gain in a certain direction, taking both horizontal and vertical separation into account.

Development is underway on additional features to be added to Release 2. Other planned features include enhanced group handling, flexible grants and grant updates, indoor penetration loss measurements, refined propagation modeling, registration enhancements, and support for beamforming. The Release 2 specifications will include updates to the SAS-to-SAS and SAS-to-CBSD protocols to support these new features, and a Release 2 test specification allowing industry to self certify against requirements that do not impact Part 96.

The document (WINNF-TS-1001) can be downloaded here.

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