信息技术.项目管理的射频识别.第61部分:860 MHz到960 MHz A型空中接口通信用参数

[中文适用范围]： 本部分ISO/IEC 18000定义了在860 MHz至960 MHz工业、科学和医疗（ISM）频段运行的射频识别（RFID）设备的空中接口，用于物品管理应用。它为可用于开发RFID应用标准的ISO委员会提供了RFID设备的通用技术规范。本部分ISO/IEC 18000旨在允许兼容性并鼓励国际市场上日益增长的RFID市场的互操作性。它定义了技术属性的前向链路和回程链路参数，包括但不限于：工作频率、工作信道精度、占用信道带宽、最大有效全向辐射功率（EIRP）、杂散发射、调制、占空比、数据编码、比特率、比特率精度、比特传输顺序，以及在适当情况下定义的工作信道、跳频速率、跳频序列、扩频序列和码片速率。它还定义了空中接口中使用的通信协议。 本部分ISO/IEC 18000规定了无源后向散射、询问者先说（ITF）系统的物理和逻辑要求。该系统由询问器（也称为阅读器）和标签（也称为标签）组成。询问器通过向标签发射连续波（CW）射频信号来接收来自标签的信息；标签通过调制其天线的反射系数来响应，从而将信息信号后向散射回询问器。该系统是ITF，意味着标签仅在询问器的指导下调制其天线反射系数以发送信息信号。 详细而言，本部分ISO/IEC 18000包含A型。A型是ITF。A型在前向链路中使用脉冲间隔编码（PIE），并采用自适应ALOHA防碰撞仲裁算法。 本部分ISO/IEC 18000规定了： 询问器和标签之间的物理交互（通信链路的信令层）； 询问器和标签的操作程序及命令； 用于在多标签环境中识别特定标签的防碰撞仲裁方案。 [外文原描述]： ISO/IEC 18000-61:2012 defines the air interface for radio frequency identification (RFID) devices operating in the 860 MHz to 960 MHz Industrial, Scientific, and Medical (ISM) band used in item management applications. It provides a common technical specification for RFID devices that can be used by ISO committees developing RFID application standards. It is intended to allow for compatibility and to encourage inter-operability of products for the growing RFID market in the international marketplace. It defines the forward and return link parameters for technical attributes including, but not limited to, operating frequency, operating channel accuracy, occupied channel bandwidth, maximum effective isotropic radiated power (EIRP), spurious emissions, modulation, duty cycle, data coding, bit rate, bit rate accuracy, bit transmission order, and, where appropriate, operating channels, frequency hop rate, hop sequence, spreading sequence, and chip rate. It further defines the communications protocol used in the air interface. ISO/IEC 18000-61:2012 specifies the physical and logical requirements for a passive-backscatter, Interrogator-Talks-First (ITF) systems. The system comprises Interrogators, also known as readers, and tags, also known as labels. An Interrogator receives information from a tag by transmitting a continuous-wave (CW) RF signal to the tag; the tag responds by modulating the reflection coefficient of its antenna, thereby backscattering an information signal to the Interrogator. The system is ITF, meaning that a tag modulates its antenna reflection coefficient with an information signal only after being directed to do so by an Interrogator. ISO/IEC 18000-61:2012 contains Type A. Type A is ITF. Type A uses Pulse-Interval Encoding (PIE) in the forward link and an adaptive ALOHA collision-arbitration algorithm. ISO/IEC 18000-61:2012 specifies physical interactions (the signalling layer of the communication link) between Interrogators and tags, Interrogator and tag operating procedures and commands, the collision arbitration scheme used to identify a specific tag in a multiple-tag environment.