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Performance Impact of Coexistence Groups in a GAA-GAA Coexistence Scheme in the CBRS Band



Anirudha Sahoo, Weichao Gao


The General Authorized Access (GAA) users in the Citizens Broadband Radio Service (CBRS) band are the lowest priority users who not only have to make sure that they do not cause harmful interference to the higher tier users but also must cooperate with each other to minimize potential interference among themselves. Thus, efficient GAA coexistence scheme is essential for operation of GAA users and to obtain high spectrum utilization. Towards this goal, the Wireless Innovation Forum (WInnForum) has recommended three schemes to facilitate coexistence among the GAA users. In an earlier study, We reported a performance study of one of these schemes (called Approach 1), but that study was limited to having no Coexistence Group (CxG). A CxG is responsible for managing interference among its CBSDs. In this paper, we study the performance of Approach 1 with and without CxGs in various configurations. We choose two actual locations in the USA around which our study is conducted using actual terrain and land cover data of the continental USA. We evaluate performance of the scheme, with and without CxGs, at different deployment densities, using different propagation models at those two locations. We provide some interesting insights into the costs and benefits of having CxGs in the deployment.
IEEE Transactions on Cognitive Communications and Networking


CBRS, GAA, Coexistence, 3.5 GHz


Sahoo, A. and Gao, W. (2020), Performance Impact of Coexistence Groups in a GAA-GAA Coexistence Scheme in the CBRS Band, IEEE Transactions on Cognitive Communications and Networking, [online], (Accessed May 24, 2024)


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Created June 16, 2020, Updated January 11, 2021