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Illusl1ingtou, DCC 20515 
The Honorable Tom Wheeler, Chairman 
Federal Communications Commission 
445 lt11 Street, SW 
Washington, O.C. 20554 
Dear Chairman Wheeler: 
June 24, 2016 
As the sponsors of the Wi-Fi Innovation Act, we have long supported efforts to meet the wireless needs of 
consumers by freeing up underutilized spectrum to maximize unlicensed use in the 5.9 GHz band. Just 
last month an industry report indicated that Americans consumed a record 9.6 trillion megabits of data in 
2015, more than doubling the amount of data used in 2014. The demand for wireless spectrum cannot be 
understated, which is why we write to applaud your efforts to set further timelines and guidelines to 
ensure a robust spectrum testing process which will determine whether and how spectrum in this band can 
safely and efficiently be shared between incumbent users and unlicensed uses such as Wi-Fi. 
Congress, the Federal Communications Commission (FCC), and the Department of Transportation must 
work together with industry to help meet this demand, wh ile also ensuring that the transportation 
technologies utilizing this band can operate safely when such technology is deployed in the future. The 
public notice recently issued by the Commission sets forth clear guidelines to test prototype devices and 
most importantly, includes deadlines to complete testing by early 2017. We strongly encourage you to 
adhere to these timelines. 
The 5.9 GHz band represents a unique opportunity to maximize the efficient use of a valuable resource. 
The FCC, along with relevant public and private sector stakeholders must seize this opportunity to 
conduct testing and find solutions to interference now. We urge the FCC to proceed expeditiously with 
collaborative testing to determine how unlicensed dev ices can coexist with existing users of the band. We 
are confident the FCC can identify and successfully resolve any potential interference issues through 
thorough analysis and testing, and we hope this process will ultimately unleash innovation, spur the 
economy, and expand Wi-Fi while protecting safety-of-life transportation systems. We commend 
Commissioners O'Reilly and Rosenworcel for their bipartisan leadership on this issue and their 
commitment to mov ing this process forward. 
Thank you for your continued work and attention to this matter. We look forward to working with you to 
address the spectrum crunch and expand spectrum availability to support the growing wireless needs of 
consumers. 
Sincerely, 
Senator Marco Rubio Senator Cory A. Booker 
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Representative Doris Matsui