{"id":511805,"date":"2018-10-15T01:23:17","date_gmt":"2018-10-15T08:23:17","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&p=511805"},"modified":"2018-10-17T08:17:14","modified_gmt":"2018-10-17T15:17:14","slug":"interference-management-for-unlicensed-users-in-shared-cbrs-spectrum","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/interference-management-for-unlicensed-users-in-shared-cbrs-spectrum\/","title":{"rendered":"Interference management for unlicensed users in shared CBRS spectrum"},"content":{"rendered":"

The citizen broadband radio service (CBRS) is a newly re-purposed spectrum band in 3550-3700 MHz, reclaiming spectrum occasionally used by radars and other incumbents for mobile data communication. It is also a poster child for future LTE-based dynamic spectrum access systems. At present, CBRS does not manage interference from unlicensed LTE users, which we show can be detrimental for its performance. In this paper we develop F-CBRS, a decentralized spectrum interference management system for unlicensed LTE users in the CBRS band. We first look at how much information can each operator be allowed to conceal and how much it has to be mandated (by a regulator) to disclose, and formally prove that the network can achieve fairness only if all operators share fully verifiable information about base station locations and user activity. Using this insight we design a channel allocation scheme to efficiently utilize spectrum and incentivise collaboration. This also includes a simple, non-disruptive channel change scheme to frequently and efficiently change channels to accommodate dynamic traffic and environments. Through simulation and testbed evaluation, we show that we increase throughput of more than 90% of the flow by 80%-100% compared to the current CBRS protocol.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

The citizen broadband radio service (CBRS) is a newly re-purposed spectrum band in 3550-3700 MHz, reclaiming spectrum occasionally used by radars and other incumbents for mobile data communication. It is also a poster child for future LTE-based dynamic spectrum access systems. At present, CBRS does not manage interference from unlicensed LTE users, which we show […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"ACM","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and\/or a fee. 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However, today\u2019s unlicensed wireless technologies are effective only over short distances. The only exceptions are narrow-band IoT solutions (e.g. LoRA, Sigfox) which have an extended range but also a very low throughput. 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