（美国有线电视新闻网商业）美国最大的移动运营商表示，他们不会进一步推迟在机场附近推出 5G 无线服务——在本周的关键最后期限之前加剧运输官员和电信行业之间的紧张关系，这可能会引发美国广泛的航班延误和改道。
在 CNN 周日审查的一封信中，Verizon 和 AT&T（拥有 CNN 的母公司 WarnerMedia）的首席执行官提议对其 5G 天线实施与在法国机场附近使用的天线类似的限制，为期六个月。但他们拒绝了交通部和美国联邦航空管理局关于将 1 月 5 日在一组重要无线电频率（称为 C 波段）上提供 5G 服务的开始日期推迟的呼吁。
“就其核心而言，你提出的框架要求我们同意将我们公司在 50 个未命名大都市区的数十亿美元投资的监督权移交给 FAA，为期数月或数年未定。”这些公司写道。 “同意你的提议不仅是对我们民主结构中精心制定的正当程序和制衡的史无前例和毫无根据的规避，而且是不负责任地放弃部署世界级和具有全球竞争力的通信网络所需的操作控制.”
运营商此前已将开始日期从 2021 年 12 月 5 日推迟到 2022 年 1 月 5 日。
交通官员和航空业对 5G 传输可能对雷达高度计产生的可能影响表示担忧，雷达高度计是依靠无线电信号告诉飞行员他们离地面多远的飞机设备。
去年 12 月，美国联邦航空局发布紧急警告称，它计划禁止在安装了 5G 天线的机场周围的低能见度条件下使用雷达高度计，并表示在某些情况下，潜在的干扰可能会干扰着陆。该机构当时没有具体说明哪些机场将受到该规则的影响，但估计这些限制可能会导致数千架飞机受到影响，并警告航空旅客将受到大规模干扰。航空业团体回应了那些即将发生危机的警告，称数十万航班和数千万乘客可能会改道或延误。
“如果没有适当的缓解措施，机场周围的 5G 部署可能会中断多达 345,000 次客运航班——影响 3200 万旅客——此外，每年还有 5,400 趟货运航班以延误、改道或取消的形式出现，”该公司发言人卡特杨说。美国航空公司，一个代表美国客运和货运航空公司的贸易集团。 “我们继续敦促 FCC 和电信行业与 FAA 和航空业合作，制定实用的解决方案，以实现 5G 技术的推出，同时将安全放在首位并避免对航空系统造成任何干扰。”
但是，负责监督美国无线电波使用情况的联邦通信委员会在经过几年的研究后得出的结论是，干扰的风险很小，因为雷达高度计使用的频率与 5G 使用的频率相距超过200 兆赫的空白“保护带”频谱。航空业和 FAA 也参与了 FCC 的审查过程，最终导致 2020 年在 C 波段中批准 5G。
电信行业组织表示，C 波段频率的 5G 已经在全球部署，并且没有任何涉及 5G 和飞机的事件报告。
“物理定律在美国和法国是一样的，”AT&T 和 Verizon 周日写道。 “如果允许美国航空公司每天在法国运营航班，那么相同的运营条件应该允许它们在美国这样做。”
美国联邦航空局和交通部没有立即回应置评请求。
AT&T and Verizon won't further delay 5G rollout amid a looming aviation impasse
(CNN Business)The nation's biggest cellular carriers say they won't further delay the rollout of 5G wireless service near airports — ratcheting up tensions between transportation officials and the telecom industry ahead of a critical deadline this week that could trigger widespread US flight delays and diversions.
In a letter Sunday reviewed by CNN, the CEOs of Verizon and AT&T (which owns WarnerMedia, CNN's parent company) offered to implement similar restrictions on their 5G antennas as those used near French airports, for six months. But they rebuffed calls by the Transportation Department and the Federal Aviation Administration to push back the Jan. 5 start date for 5G service on an important set of radio frequencies known as the C-Band.
"At its core, your proposed framework asks that we agree to transfer oversight of our companies' multi-billion dollar investment in 50 unnamed metropolitan areas representing the lion's share of the U.S. population to the FAA for an undetermined number of months or years," the companies wrote. "Agreeing to your proposal would not only be an unprecedented and unwarranted circumvention of the due process and checks and balances carefully crafted in the structure of our democracy, but an irresponsible abdication of the operating control required to deploy world-class and globally competitive communications networks."
The carriers had previously pushed back the start date from Dec. 5, 2021 to Jan. 5, 2022.
Transportation officials and the aviation industry have expressed concerns about the possible impact that 5G transmissions may have on radar altimeters, aircraft equipment that relies on radio signals to tell pilots how far they are from the ground.
In December, the FAA issued an urgent warning saying it planned to ban the use of radar altimeters in low-visibility conditions around airports where 5G antennas were installed, saying the potential for interference could disrupt landings in some circumstances. The agency did not specify at the time which airports would be affected by the rule, but estimated that the restrictions could lead to thousands of aircraft being affected and warned of mass disruptions to air travelers. Aviation industry groups echoed those warnings of an impending crisis, saying hundreds of thousands of flights and tens of millions of passengers could be diverted or delayed.
"Without appropriate mitigations, the 5G deployment around airports could disrupt as many as 345,000 passenger flights — impacting 32 million travelers — in addition to 5,400 cargo flights each year in the form of delays, diversions or cancelations," said Carter Yang, a spokesperson for Airlines for America, a trade group representing US passenger and freight airlines. "We continue to urge the FCC and the telecom industry to work with the FAA and the aviation industry on a practical solution that will enable the rollout of 5G technology while prioritizing safety and avoiding any disruption to the aviation system."
But the Federal Communications Commission, which oversees the use of radio airwaves in the US, has concluded after several years of study that there is little risk of interference, as the frequencies used by radar altimeters are separated from the frequencies used for 5G by more than 200 megahertz of blank "guard band" spectrum. The aviation industry and the FAA also participated in the FCC's review process that ultimately led to the approval of 5G in the C-Band in 2020.
Telecom industry groups have said 5G in the C-Band frequencies has already been deployed worldwide, and that there have been no reported incidents anywhere involving 5G and aircraft.
"The laws of physics are the same in the United States and France," AT&T and Verizon wrote on Sunday. "If U.S. airlines are permitted to operate flights every day in France, then the same operating conditions should allow them to do so in the United States."
The FAA and DOT didn't immediately respond to a request for comment.
