IEEE 802

ќпубликовано: 11.08.2008
¬ерси€ текста: 1.0

IEEE 802 стандарт включают семейство стандартов организации сети, которые охватывают физический уровень спецификации технологий от кабельной до беспроводной св€зи. IEEE 802 разделен на 22 части, которые описывают физические аспекты и аспекты св€зи данных организации сети. —амые известные спецификации – 802.3 Ethernet, 802.11 Wi-Fi, 802.15 Bluetooth/ZigBee, и 802.16. “аблица представл€ет список самых попул€рных секций IEEE 802 со времени опубликовани€ статьи.  опии этих спецификаций доступны от сайте IEEE.

IEEE 802 Networking Standards

—тандарт “ема стандарта ќписание
802Overviewќсновы ‘изических и Ћогических концепций организации сети
802.1BridgingLAN/MAN Bridging and Management. Covers Management and the Lower Sub-Layers of OSI Layer 2, Including MAC-Based Bridging (Media Access Control), Virtual LANs and Port-Based Access Control.
802.2Logical LinkCommonly Referred to as the LLC or Logical Link Control Specification. The LLC is the Top Sub-Layer in the Data-Link Layer, OSI Layer 2. Interfaces with the Network Layer 3.
802.3EthernetЂGrandaddyї of the 802 Specifications. Provides Asynchronous Networking Using ЂCarrier Sense, Multiple Access with Collision Detectї (CSMA/CD) over Coaxial Cable, Twisted-Pair Copper, and Fiber Media. Current Speeds Range from 10 MBps to 10 GBps.
802.5Token RingThe Original Token-Passing Standard for Twisted-Pair, Shielded Copper Cables. Supports Copper and Fiber Cabling from 4 MBps to 100 MBps. Often Called ЂIBM Token-Ring.ї
802.11Wi-FiWireless LAN Media Access Control and Physical Layer Specification. 802.11a, b, g, etc. Are Amendments to the Original 802.11 Standard. Products That Implement 802.11 Standards Must Pass Tests and Are Referred to as ЂWi-Fi Certified.ї
802.11aХ Specifi es a PHY That Operates in the 5 GHz U-NII Band in the U.S.ЧInitially 5.15Ц5.35 and 5.725Ц5.85ЧSince Expanded to Additional Frequencies
Х Uses Orthogonal Frequency-Division Multiplexing
Х Enhanced Data Speed to 54 MBps
Х Ratifi ed After 802.11b
802.11bХ Enhancement to 802.11 That Added Higher Data Rate Modes to the DSSS (Direct Sequence Spread Spectrum) Already Defi ned in the Original 802.11 Standard
Х Boosted Data Speed to 11 MBps
Х 22 MHz Bandwidth Yields Three Non-Overlaping Channels in the Frequency Range of 2.400 GHz to 2.4835 GHz
Х Beacons at 1 MBps, Falls Back to 5.5, 2, or 1 MBps from 11 MBps Maximum
802.11dХ Enhancement to 802.11a and 802.11b That Allows for Global Roaming
Х Particulars Can Be Set at Media Access Control (MAC) Layer
802.11eХ Enhancement to 802.11 That Includes Quality of Service (QoS) Features
Х Facilitates Prioritization of Data, Voice, and Video Transmissions
802.11gХ Extends the Maximum Data Rate of WLAN Devices That Operate in the 2.4 GHz Band, in a Fashion That Permits Interoperation With 802.11b Devices
Х Uses OFDM Modulation (Orthogonal FDM)
Х Operates at up to 54 Megabits per Second (MBps), With Fall-Back Speeds That Include the ЂBї Speeds
802.11hХ Enhancement to 802.11a That Resolves Interference Issues
Х Dynamic Frequency Selection (DFS)
Х Transmit Power Control (TPC)
802.11iХ Enhancement to 802.11 That Offers Additional Security for WLAN Applications
Х Defines More Robust Encryption, Authentication, and Key Exchange, as Well as Options for Key Caching and Pre-Authentication
802.11jХ Japanese Regulatory Extensions to 802.11a Specification
Х Frequency Range 4.9 GHz to 5.0 GHz
802.11kХ Radio Resource Measurements for Networks Using 802.11 Family Specifications
802.11mХ Maintenance of 802.11 Family Specifications
Х Corrections and Amendments to Existing Documentation
802.11nХ Higher-Speed StandardsЧЅыл опубликован в ќкт€бре 2009 года
Х Several Competing and Non-Compatible Technologies; Often Called ЂPre-Nї
Х Top Speeds Claimed of 108, 240, and 350+ MHz
Х Competing Proposals Come From the Groups EWC, Tgn Sync, and Wwise and Are All Variations Based on MIMO (Multiple Input, Multiple Output)
802.11xХ Misused ЂGenericї Term for 802.11 Family Specifications
802.12 Demand PriorityIncreases Ethernet Data Rate to 100 MBps by Controlling Media Utilization.
802.13 Ќе используетс€Ќе используетс€
802.14 Cable ModemsWithdrawn PAR. Standards Project No Longer Endorsed by the IEEE.
802.15 Wireless Personal Area NetworksCommunications Specifi cation That Was Approved in Early 2002 by the IEEE for Wireless Personal Area Networks (WPANs).
802.15.1 BluetoothShort Range (10 m) Wireless Technology for Cordless Mouse, Keyboard, and Hands-Free Headset at 2.4 GHz
802.15.3a UWBShort Range, High-Bandwidth Ultra Widebandї Link
802.15.4 ZifBeeShort Range Wireless Sensor Networks
802.15.5 Mesh NetworkХ Extension of Network Coverage Without Increasing the Transmit Power or the Receiver Sensitivity
Х Enhanced Reliability Via Route Redundancy
Х Easier Network Confi gurationЧBetter Device Battery Life
802.16 Wireless Metropolitan Area NetworksThis Family of Standards Covers Fixed and Mobile Broadband Wireless Access Methods Used to Create Wireless Metropolitan Area Networks (WMANs). Connects Base Stations to the Internet Using OFDM in Unlicensed (900 MHz, 2.4, 5.8 GHz) or licensed (700 MHz, 2.5Ц3.6 GHz) Frequency Bands. Products That Implement 802.16 Standards Can Undergo WiMAX Certification Testing.
802.17 Resilient Packet RingIEEE Working Group Description
802.18 Radio Regulatory TAGIEEE 802.18 Standards Committee
802.19 CoexistenceIEEE 802.19 Coexistence Technical Advisory Group
802.20 Mobile Broadband Wireless AccessIEEE 802.20 Mission and Project Scope
802.21 Media Independent HandoffIEEE 802.21 Mission and Project Scope
802.22 Wireless Regional Area NetworkIEEE 802.22 Mission and Project Scope

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