标准摘要
[中文适用范围]： 本节描述了提供给 IEEE 802.11 无线 LAN MAC 的 PHY 服务。 不同的 PHY 被定义为 IEEE 802.11 标准的一部分。 每个 PHY 可以包含以下两个协议功能： a) PHY 聚合功能，使 PMD 系统的功能适应 PHY 服务。 该功能由 PLCP 支持，它定义了一种将 IEEE 802.11 MPDU 映射到适合使用相关 PMD 系统在两个或多个 STA 之间发送和接收用户数据和管理信息的帧格式的方法。 b) PMD系统，其功能定义了两个或多个STA之间的WM的特性以及通过WM发送和接收数据的方法。 每个 PMD 子层可能需要定义唯一的 PLCP。 如果PMD子层已经提供定义的PHY服务，则PHY汇聚功能可能为空。 [外文原描述]： The medium access control (MAC) and physical characteristics for wireless local area networks (LANs) are specified in ISO/IEC 8802-11:2005, which is part of a series of standards for local and metropolitan area networks. The medium access control unit in ISO/IEC 8802-11:2005 is designed to support physical layer units as they may be adopted dependent on the availability of spectrum. ISO/IEC 8802-11:2005 contains five physical layer units: four radio units, operating in the 2400-2500 MHz band and in the bands comprising 5.15-5.25 GHz, 5.25-5.35 GHz, and 5.725-5.825 GHz, and one baseband infrared (IR) unit. One radio unit employs the frequency-hopping spread spectrum (FHSS) technique, two employ the direct sequence spread spectrum (DSSS) technique, and another employs the orthogonal frequency division multiplexing (OFDM) technique.
英文名称Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications