智能交通系统. 陆地移动设备的通信接入 (CALM). 红外系统

[中文适用范围]： 本国际标准确定了在820 nm至1 010 nm之间使用红外系统的空气接口。 该国际标准为ITS部门使用红外系统进行中距离和中高速无线通信提供了协议和参数。 这种链接需要在以下方面进行准连续、延长或短时间通信： — 车辆和路边； — 车辆之间； — 移动设备和固定基础设施点之间； — 中长距离。 车辆可以是移动或静止的。 在可行的情况下，本国际标准通过参考现有国际标准制定，并通过选择采用。提供了所需的区域变化。 适当考虑了并利用了适当通信系统的相关部分，如全球定位系统（GPS）、数字音频广播（DAB）、数字视频广播（DVB）、无线电局域网（RLANs）、数字数据广播（DDB）、TETRA、FM副载波、移动宽带系统（MBS、W-ATM）、互联网协议和DSRC。 本国际标准 — 支持1 Mbit/s至128 Mbit/s的数据速率（也可能支持更高的数据速率）， — 支持车辆速度至少为200 km/h（关闭速度可能是此值的两倍）， — 定义或引用与链路操作相关的环境参数， — 支持通信距离至100 m（也可能支持更长的通信距离300 m至1 000 m）， — 支持毫秒级的延迟和通信延迟， — 符合区域/国家法规参数， — 可能支持其他适用的区域/国家参数。 特定应用要求不在本国际标准范围内。这些要求将在CALM管理和上层标准以及应用标准中定义。特定应用的上层不包括在本国际标准中，但将由应用标准驱动（可能不特定于技术）。 [外文原描述]： ISO 21214:2015 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 high speed 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 extant International Standards, adopted by selection. Required regional variations are provided. Due account is given to, and made use of, any relevant parts of appropriate communications systems such 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. ISO 21214:2015 - supports data rates of 1 Mbit/s up to 128 Mbit/s (it may also support higher data rates), - supports vehicle speeds to a minimum of 200 km/h (closing speeds could be double this value), - defines or reference environmental parameters relevant to link operation, - supports communication distances to 100 m (it may also support longer communication distances of 300 m to 1 000 m), - supports latencies and communication delays in the order of milliseconds, - is compliant to regional/national regulatory parameters, and - may support other regional/national parameters, as applicable. Application specific requirements are outside the scope of this International Standard. These requirements will be defined in the CALM management and upper layer standards and in application standards. Application specific upper layers are not included in this International Standard but will be driven by application standards (which may not be technology specific).