不，它不是AM，FM，SiriusXM，HD或组合。它不是导航系统或蓝牙音频附件中的GPS收音机。甚至是CB收音机。相反，它可能会成为C-V2X的东西，基本上是“蜂窝载体到一切”的速记。
这个新的收音机将与其他附近车辆以及蜂窝网络提供双向通信。你不会个人做沟通，但你的车辆收音机会。
Your Government in Action
The whole idea is a part of the国家公路运输安全管理局（NHTSA）goal to improve vehicle safety by having cars and trucks in close proximity communicating with one another. Called vehicle-to-vehicle (V2V) communications, this feature shows great promise in helping to reduce deaths and injuries, avoid crashes, ease traffic congestion, and improve the environment.
V2V无线电是转发器，使车辆自动交换信息的信息，速度，方向和其他数据范围内的其他数据，通常高达300米。通过交换标准数据包，车辆可以分析它们，确定潜在的威胁，并为驾驶员提供具有声音或视觉警报的驾驶员的早期警告。未来的TIE-INS适用于目前的先进驾驶员援助系统（ADA）和自动驾驶车辆是可能的。
虽然该计划的主要特征是V2V，但这些新的无线电也可以与交通信息基础架构（V2I）等外部实体（V2I）进行通信，这些实体提供交通更新，施工通知，天气警告和其他相关旅行数据。其他环节是可能的，打开车辆的机会与几乎任何东西（V2X）通信。
政府和行业一直在努力几十年。它开发了一种被称为专用短程通信（DSRC）的无线电技术。类似于Wi-Fi标准的无线技术被指定为IEEE 802.11p并在5.9-GHz频谱中运行。
In 1999, the Federal Communications Commission (FCC) dedicated a 75-MHz block of spectrum to DSRC. Radios were designed and built and tested, but nothing else happened. A few automakers showed interest, but overall acceptance was lacking and adoptions were few. Now, 20 years later, the whole idea of V2V hasn’t progressed. However, that may be about to change.
New Life for an Old Idea
A new similar radio technology called cellular-V2X has come along to challenge DSRC. C-V2X is based on 4G LTE and ultimately the 5G standards. It too would operate in the 5.9-GHz spectrum assignment. And it will use the existing cellular system to communicate with whatever infrastructure will be developed, thus avoiding the cost of creating the infrastructure for DSRC.
启用V2V的直接通信模式由此创建Third Generation Partnership Project (3GPP)，蜂窝标准的开发人员在第12版本中.3GPP在第9版中添加了LTE广播，该特征也适用于C-V2X。3GPP在5G标准的版本中引入了C-V2X。
Some additional benefits of C-V2X over DSRC include an extended communications range of up to several miles and an upgrade path with 5G in the future. The lower latency of 5G will provide faster reaction times for drivers as well as any ADAS.
因此，C-V2X针对V2V和V2X标准挑战了DSRC。它不仅找到了广泛的支持，不仅可以使用蜂窝载体，芯片制造商和测试仪器公司，也有许多汽车制造商。经过二十年的沉思后，正在进行一些进展，最终将V2V / V2X纳入现代车辆。
C-V2X Spectrum
In a recent speech, FCC Chairman Ajit Pai, provided almost direct approval for C-V2X with new frequency allocations in the 5.9-GHz band. His actions benefit both Wi-Fi and the V2X movement. Take a look at his reassignment of the previously allocated 75-MHz of DSRC spectrum.
较低的45-MHz频谱将达到未经许可的服务，即Wi-Fi。使用2.4-GHz Wi-Fi频段充分且拥挤，需要更多的频谱来跟上Wi-Fi开发。新的更快标准，如802.11ac（Wi-Fi 5）和802.11ax（Wi-Fi 6）在5-GHz频段中运行，需要更多的带宽。考虑到所有互联网连接的超过一半是通过Wi-Fi的超过一半，这是一个很好的用途。
佩议长还提出了75 MHz的20 MHz，转到C-V2X。剩下的10 MHz将转到DSRC或C-V2X，无论最终赢得该竞争。这一决定显然不会杀死DSRC运动。一个提议是采用两种技术，DSRC处理V2V和C-V2X处理V2I / V2X。已经开发了包含两个无线电的芯片组。
These proposed assignments will be put into a Notice of Proposed Rulemaking for the Commissioner’s approval at this week’s meeting (Dec. 12). This should be signal enough for the auto industry and others to move quickly to bless C-V2X and adopt it. Otherwise, the NHTSA could mandate it to move things along.
帕议员的公告肯定会支持C-V2X。政府，行业，研究公司和消费者群体的反馈一直压倒性。也许这将获得汽车行业和NHTSA一些激励在对整个V2X计划作出决定。退出谈论它并决定追求哪种技术。
In the meantime, it looks like Europe may have already made a decision. Volkswagen is building DSRC, or the European version ITS-G5, into its new VW Golf. It’s using NXP’s SAF5400 modem and TEF5100 transceiver that handle all of the IEEE 802.11p standard’s features upon which DSRC is based. This 5.9-GHz device also complies with the IEEE 1609.4 and AEC-Q100 grade 2 standards.
The whole V2V/V2X idea is basically a good one. However, the V2X movement is stalled until a decision is made. Why drag it out? Two workable technologies are available right now.
Almost all parties involved agree that it will save millions of lives and crash occurrences will decline. That’s the good news. The bad news is that it will take years (decades?) for enough C-V2X equipped vehicles to populate the roads to make this work. Let’s get started.
