Rttt . . road transport and traffic telematics . dedicated short - range communications . application layer 道路運輸和交通遠(yuǎn)程信息技術(shù)
Walkie - talkies that operate at 409 mhz are usually smaller , and are suitable for short - range communication 409兆赫對講機的體積較小,適合短距離通訊。
Rttt . . rttt road transport and traffic telematics - dedicated short - range communication - profiles for rttt applications 道路運輸和交通遠(yuǎn)程通信處理技術(shù)
Dsrc . dsr road transport and traffic telematics - dedicated short - range communication - dsrc application layer ; english version en 12834 : 2003 道路運輸和交通遠(yuǎn)程信息管理.專用短程通信
Road transport and traffic telematics - dedicated short - range communication - physical layer using microwave at 5 . 8 ghz 道路運輸和交通遠(yuǎn)程信息處理技術(shù).專用短途通信.使用5 . 8 ghz微波的物理層