IEEE Std 802.15.7-2018 pdf free download – IEEE Standard for Local and metropolitan area networks— Part 1 5.7: Short-Range Optical Wireless Communications.
1.1 Scope
This standard defines a physical layer (PHY) and medium access control (MAC) sublayer for short-range optical wireless communications (OWC) in optically transparent media using light wavelengths from 10 000 nm to 190 nm. The standard is capable of delivering data rates sufficient to support audio and video multimedia services and also considers mobility of the optical link, compatibility with various light infrastructures, impairments due to noise and interference from sources like ambient light, and a MAC sublayer that accommodates the unique needs of visible links as well as the other targeted light wavelengths. It also accommodates optical communications for cameras where transmitting devices incorporate light- emitting sources and receivers are digital cameras with a lens and image sensor. The standard adheres to applicable eye safety regulations.
1.2 Purpose
This standard provides a global standard for short-range OWC. The standard provides the following: — Access to several hundred terahertz of unlicensed spectrum.
— Immunity to electromagnetic interference and noninterference with radio frequency systems.
— For visible light systems, additional security by allowing the user to see the communication channel.
— Communication augmenting and complementing existing services (e.g., illumination, display, indication, decoration).
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used; therefore, each referenced document is cited in text, and its relationship to this document is explained). For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. ANSI/INCITS 373: Fiber Channel Framing and Signaling Interface (FC-FS).
IEEE Std 802.15.4 TM -2015, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements— Part 15.4: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (LR-WPANs).
ITU-T I.432.1, Series I: Integrated Services Digital Network, ISDN user-network interfaces—Layer 1RecommendationsB-ISDN user-network interface—Physical layer specification: General characteristics, http://www.itu.int/rec/T-REC-I.432.1-199902-I/en.
3. Definitions, acronyms, and abbreviations For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
3.1 Definitions
blending: The disproportional merging of two different images as a single image.
color function: A function that provides information, such as device status and channel quality, to the human eye via color.
color stabilization: A control loop for the stabilization of the color emitted by color-shift keying (CSK) transmitters.
color visibility dimming (CVD) frame: A frame used for color, visibility, and dimming support.
compensation time: The idle time inserted in the idle pattern or in the data frame, where the light is turned N or OFF with the appropriate ratio to meet dimming requirements.
dimming: Reducing the radiant power of a transmitting light.
idle pattern: A pattern whose duty cycle variation results in a change of brightness for dimming support.
image sensor: A sensor that captures an image and translates it into a light-coded output signal.
macro cell: An aggregate cell formed using all the cells available at the optical media.IEEE Std 802.15.7 pdf download.