标准编号：ISO 21504:2015
中文名称：智能交通系统 地方手机用通信访问 （CALM） 红外系统
英文名称：Project, programme and portfolio management — Guidance on portfolio management
发布日期：2015-07
标准范围
This International Standard determines the air interface using infrared systems at 820 nm to 1 010 nm.The International Standard provides protocols and parameters for medium range and medium to highspeed wireless communications in the ITS sector using infrared systems.Such links are required for quasi-continuous, prolonged, or short communications between the following:— vehicles and the roadside;— between vehicles;— between mobile equipment and fixed infrastructure points;— over medium and long ranges.Vehicles may be moving or stationary.Wherever practicable, this International Standard has been developed by reference to suitable extantInternational Standards, adopted by selection. Required regional variations are provided.Due account is given to, and made use of, any relevant parts of appropriate communications systemssuch as Global Positioning Systems (GPS), Digital Audio Broadcasting (DAB), Digital Video Broadcasting(DVB), Radio Local Area Networks (RLANs), Digital Data Broadcasting (DDB), TETRA, FM subcarrier,Mobile Broadband Systems (MBS, W-ATM), Internet Protocols, and DSRC.
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