IEEE 802.16

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IEEE 802.16
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Working Group on Broadband Wireless Access Standards

IEEE 802.16 is a series of wireless broadband standards written by the Institute of Electrical and Electronics Engineers (IEEE). The IEEE Standards Board established a working group in 1999 to develop standards for broadband for wireless metropolitan area networks. The Workgroup is a unit of the IEEE 802 local area network and metropolitan area network standards committee.

Wireless broadband

Wireless broadband is telecommunications technology that provides high-speed wireless Internet access or computer networking access over a wide area. The term comprises both fixed and mobile broadband.

Institute of Electrical and Electronics Engineers scholarly society, publisher and standards organization, headquartered in US

The Institute of Electrical and Electronics Engineers (IEEE) is a professional association for electrical engineers with its corporate office in New York City and its operations center in Piscataway, New Jersey. It was formed in by Dr.Madhusudhan S in 1963 from the amalgamation of the American Institute of Electrical Engineers and the Institute of Radio Engineers.

Metropolitan area network computer network that interconnects users with computer resources in a geographic area or region

A metropolitan area network (MAN) is a computer network that interconnects users with computer resources in a geographic region of the size of a metropolitan area. The term MAN is applied to the interconnection of local area networks (LANs) in a city into a single larger network which may then also offer efficient connection to a wide area network. The term is also used to describe the interconnection of several local area networks in a metropolitan area through the use of point-to-point connections between them.

Contents

Although the 802.16 family of standards is officially called WirelessMAN in IEEE, it has been commercialized under the name "WiMAX" (from "Worldwide Interoperability for Microwave Access") by the WiMAX Forum industry alliance. The Forum promotes and certifies compatibility and interoperability of products based on the IEEE 802.16 standards.

WiMAX wireless broadband standard

WiMAX is a family of wireless broadband communication standards based on the IEEE 802.16 set of standards, which provide multiple physical layer (PHY) and Media Access Control (MAC) options.

The 802.16e-2005 amendment version was announced as being deployed around the world in 2009. [1] The version IEEE 802.16-2009 was amended by IEEE 802.16j-2009.

Standards

Projects publish draft and proposed standards with the letter "P" prefixed. Once a standard is ratified and published, that "P" gets dropped and replaced by a trailing dash and suffix year of publication.

Projects

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Standard Description Status
802.16 Fixed Broadband Wireless Access (10–66 GHz) Superseded
802.16.2 Recommended practice for coexistence Superseded
802.16c System profiles for 10–66 GHz Superseded
802.16a Physical layer and MAC definitions for 2–10 GHz Superseded
P802.16b License-exempt frequencies
(Project withdrawn)
Withdrawn
P802.16d Maintenance and System profiles for 2–11 GHz
(Project merged into 802.16-2004)
Merged
802.16 Air Interface for Fixed Broadband Wireless Access System
(rollup of 802.16–2001, 802.16a, 802.16c and P802.16d)
Superseded
P802.16.2a Coexistence with 2–11 GHz and 23.5–43.5 GHz
(Project merged into 802.16.2-2004)
Merged
802.16.2 IEEE Recommended Practice for Local and metropolitan area networks
Coexistence of Fixed Broadband Wireless Access Systems
(Maintenance and rollup of 802.16.2–2001 and P802.16.2a)
Released on 2004-March-17.
Current
802.16f Management Information Base (MIB) for 802.16-2004 Superseded
802.16-2004/Cor 1–2005 Corrections for fixed operations
(co-published with 802.16e-2005)
Superseded
802.16e Mobile Broadband Wireless Access System Superseded
802.16k IEEE Standard for Local and Metropolitan Area Networks: Media Access Control (MAC) Bridges
Amendment 2: Bridging of IEEE 802.16
(An amendment to IEEE 802.1D)
Released on 2007-August-14.
Current
802.16g Management Plane Procedures and Services Superseded
P802.16i Mobile Management Information Base
(Project merged into 802.16-2009)
Merged
802.16-2009 Air Interface for Fixed and Mobile Broadband Wireless Access System
(rollup of 802.16–2004, 802.16-2004/Cor 1, 802.16e, 802.16f, 802.16g and P802.16i)
Superseded
802.16j Multihop relay Superseded
802.16h Improved Coexistence Mechanisms for License-Exempt Operation Superseded
802.16m Advanced Air Interface with data rates of 100 Mbit/s mobile and 1 Gbit/s fixed.
Also known as Mobile WiMAX Release 2 or WirelessMAN-Advanced.
Aiming at fulfilling the ITU-R IMT-Advanced requirements on 4G systems.
Superseded [2]
802.16-2012 IEEE Standard for Air Interface for Broadband Wireless Access Systems
It is a rollup of 802.16h, 802.16j and Std 802.16m
(but excluding the WirelessMAN-Advanced radio interface, which was moved to IEEE Std 802.16.1).
Released on 2012-August-17.
Superseded
802.16.1 IEEE Standard for WirelessMAN-Advanced Air Interface for Broadband Wireless Access Systems
Released on 2012-September-07.
Current
802.16p IEEE Standard for Air Interface for Broadband Wireless Access Systems
Amendment 1: Enhancements to Support Machine-to-Machine Applications
Released on 2012-October-08.
Current
802.16.1b IEEE Standard for WirelessMAN-Advanced Air Interface for Broadband Wireless Access Systems
Amendment 1: Enhancements to Support Machine-to-Machine Applications
Released on 2012-October-10.
Current
802.16n IEEE Standard for Air Interface for Broadband Wireless Access Systems
Amendment 2: Higher Reliability Networks
Approved on 2013-March-06.
Current
802.16.1a IEEE Standard for WirelessMAN-Advanced Air Interface for Broadband Wireless Access Systems
Amendment 2: Higher Reliability Networks
Approved on 2013-March-06.
Current
802.16-2017 IEEE Standard for Air Interface for Broadband Wireless Access Systems
It is a rollup of 802.16p, 802.16n, 802.16q and Std 802.16s
Released on 2017-September.
Current
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802.16e-2005 Technology

The 802.16 standard essentially standardizes two aspects of the air interface – the physical layer (PHY) and the media access control (MAC) layer. This section provides an overview of the technology employed in these two layers in the mobile 802.16e specification.

PHY

802.16e uses scalable OFDMA to carry data, supporting channel bandwidths of between 1.25 MHz and 20 MHz, with up to 2048 subcarriers. It supports adaptive modulation and coding, so that in conditions of good signal, a highly efficient 64 QAM coding scheme is used, whereas when the signal is poorer, a more robust BPSK coding mechanism is used. In intermediate conditions, 16 QAM and QPSK can also be employed. Other PHY features include support for multiple-input multiple-output (MIMO) antennas in order to provide good non-line-of-sight propagation (NLOS) characteristics (or higher bandwidth) and hybrid automatic repeat request (HARQ) for good error correction performance.

Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves of the same frequency are out of phase with each other by 90°, a condition known as orthogonality or quadrature. The transmitted signal is created by adding the two carrier waves together. At the receiver, the two waves can be coherently separated (demodulated) because of their orthogonality property. Another key property is that the modulations are low-frequency/low-bandwidth waveforms compared to the carrier frequency, which is known as the narrowband assumption.

MIMO Use of multiple antennas in radio

In radio, multiple-input and multiple-output, or MIMO, is a method for multiplying the capacity of a radio link using multiple transmission and receiving antennas to exploit multipath propagation. MIMO has become an essential element of wireless communication standards including IEEE 802.11n (Wi-Fi), IEEE 802.11ac (Wi-Fi), HSPA+ (3G), WiMAX (4G), and Long Term Evolution. More recently, MIMO has been applied to power-line communication for 3-wire installations as part of ITU G.hn standard and HomePlug AV2 specification.

Non-line-of-sight (NLOS) and near-line-of-sight are radio transmissions across a path that is partially obstructed, usually by a physical object in the innermost Fresnel zone.

Although the standards allow operation in any band from 2 to 66 GHz, mobile operation is best in the lower bands which are also the most crowded, and therefore most expensive. [3]

MAC

The 802.16 MAC describes a number of Convergence Sublayers which describe how wireline technologies such as Ethernet, Asynchronous Transfer Mode (ATM) and Internet Protocol (IP) are encapsulated on the air interface, and how data is classified, etc. It also describes how secure communications are delivered, by using secure key exchange during authentication, and encryption using Advanced Encryption Standard (AES) or Data Encryption Standard (DES) during data transfer. Further features of the MAC layer include power saving mechanisms (using sleep mode and idle mode) and handover mechanisms.

A key feature of 802.16 is that it is a connection-oriented technology. The subscriber station (SS) cannot transmit data until it has been allocated a channel by the base station (BS). This allows 802.16e to provide strong support for quality of service (QoS).

QoS

Quality of service (QoS) in 802.16e is supported by allocating each connection between the SS and the BS (called a service flow in 802.16 terminology) to a specific QoS class. In 802.16e, there are 5 QoS classes:

802.16e-2005 QoS classes
ServiceAbbrevDefinitionTypical Applications
Unsolicited Grant ServiceUGSReal-time data streams comprising fixed-size data packets issued at periodic intervalsT1/E1 transport
Extended Real-time Polling ServiceertPSReal-time service flows that generate variable-sized data packets on a periodic basisVoIP
Real-time Polling ServicertPSReal-time data streams comprising variable-sized data packets that are issued at periodic intervalsMPEG Video
Non-real-time Polling ServicenrtPSDelay-tolerant data streams comprising variable-sized data packets for which a minimum data rate is requiredFTP with guaranteed minimum throughput[ citation needed ]
Best EffortBEData streams for which no minimum service level is required and therefore may be handled on a space-available basisHTTP

The BS and the SS use a service flow with an appropriate QoS class (plus other parameters, such as bandwidth and delay) to ensure that application data receives QoS treatment appropriate to the application.

Certification

Because the IEEE only sets specifications but does not test equipment for compliance with them, the WiMAX Forum runs a certification program wherein members pay for certification. WiMAX certification by this group is intended to guarantee compliance with the standard and interoperability with equipment from other manufacturers. The mission of the Forum is to promote and certify compatibility and interoperability of broadband wireless products.

See also

Related Research Articles

IEEE 802.11 set of media access control (MAC) and physical layer (PHY) specifications

IEEE 802.11 is part of the IEEE 802 set of LAN protocols, and specifies the set of media access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) Wi-Fi computer communication in various frequencies, including but not limited to 2.4, 5, and 60 GHz frequency bands.

In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, used in applications such as digital television and audio broadcasting, DSL internet access, wireless networks, power line networks, and 4G mobile communications.

Wireless access point device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards

In computer networking, a wireless access point (WAP), or more generally just access point (AP), is a networking hardware device that allows other Wi-Fi devices to connect to a wired network. The AP usually connects to a router as a standalone device, but it can also be an integral component of the router itself. An AP is differentiated from a hotspot, which is the physical location where Wi-Fi access to a WLAN is available.

HiperLAN is a Wireless LAN standard. It is a European alternative for the IEEE 802.11 standards. It is defined by the European Telecommunications Standards Institute (ETSI). In ETSI the standards are defined by the BRAN project. The HiperLAN standard family has four different versions.

IEEE 802.11e-2005 or 802.11e is an approved amendment to the IEEE 802.11 standard that defines a set of quality of service (QoS) enhancements for wireless LAN applications through modifications to the media access control (MAC) layer. The standard is considered of critical importance for delay-sensitive applications, such as Voice over Wireless LAN and streaming multimedia. The amendment has been incorporated into the published IEEE 802.11-2007 standard.

IEEE 802.20 IEEE standard

IEEE 802.20 or Mobile Broadband Wireless Access (MBWA) was a specification by the standard association of the Institute of Electrical and Electronics Engineers (IEEE) for mobile wireless Internet access networks. The main standard was published in 2008. MBWA is no longer being actively developed.

4G is the fourth generation of broadband cellular network technology, succeeding 3G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.

HomePlug is the family name for various power line communications specifications under the HomePlug designation, with each offering unique performance capabilities and coexistence or compatibility with other HomePlug specifications.

IEEE 802.22, is a standard for wireless regional area network (WRAN) using white spaces in the television (TV) frequency spectrum. The development of the IEEE 802.22 WRAN standard is aimed at using cognitive radio (CR) techniques to allow sharing of geographically unused spectrum allocated to the television broadcast service, on a non-interfering basis, to bring broadband access to hard-to-reach, low population density areas, typical of rural environments, and is therefore timely and has the potential for a wide applicability worldwide. It is the first worldwide effort to define a standardized air interface based on CR techniques for the opportunistic use of TV bands on a non-interfering basis.

WiBro

WiBro is a wireless broadband Internet technology developed by the South Korean telecoms industry. WiBro is the South Korean service name for IEEE 802.16e international standard. By the end of 2012, the Korean Communications Commission intends to increase WiBro broadband connection speeds to 10Mbit/s, around ten times the current speed, which will complement their 1Gbit/sec fibre-optic network.

HomeRF organization

HomeRF was a wireless networking specification for home devices. It was developed in 1998 by the Home Radio Frequency Working Group, a consortium of mobile wireless companies that included Proxim Wireless, Intel, Siemens AG, Motorola, Philips and more than 100 other companies.

IEEE 802.11n-2009, commonly shortened to 802.11n, is a wireless-networking standard that uses multiple antennas to increase data rates. The Wi-Fi Alliance has also retroactively labelled the technology for the standard as Wi-Fi 4. It standardized support for multiple-input multiple-output, frame aggregation, and security improvements, among other features, and can be used in the 2.4 GHz or 5 GHz frequency bands.

IEEE 802.11g-2003 or 802.11g is an amendment to the IEEE 802.11 specification that extended throughput to up to 54 Mbit/s using the same 2.4 GHz band as 802.11b. This specification under the marketing name of Wi-Fi has been implemented all over the world. The 802.11g protocol is now Clause 19 of the published IEEE 802.11-2007 standard, and Clause 19 of the published IEEE 802.11-2012 standard.

WiMAX MIMO

WiMAX MIMO refers to the use of Multiple-input multiple-output communications (MIMO) technology on WiMAX, which is the technology brand name for the implementation of the standard IEEE 802.16.

International Mobile Telecommunications-Advanced are the requirements issued by the ITU Radiocommunication Sector (ITU-R) of the International Telecommunication Union (ITU) in 2008 for what is marketed as 4G mobile phone and Internet access service.

Audio Video Bridging

Audio Video Bridging (AVB) is a common name for the set of technical standards developed by the Institute of Electrical and Electronics Engineers (IEEE) Audio Video Bridging Task Group of the IEEE 802.1 standards committee. This task group was renamed to Time-Sensitive Networking Task Group in November 2012 to reflect the expanded scope of work.

IEEE 802.11ac is a wireless networking standard in the 802.11 set of protocols, providing high-throughput wireless local area networks (WLANs) on the 5 GHz band. The standard was developed in the IEEE Standards Association from 2008 through 2013 and published in December 2013. The standard has been retroactively labelled as Wi-Fi 5 by Wi-Fi Alliance.

IEEE 802.11ah is a wireless networking protocol published in 2017 to be called Wi-Fi HaLow as an amendment of the IEEE 802.11-2007 wireless networking standard. It uses 900 MHz license exempt bands to provide extended range Wi-Fi networks, compared to conventional Wi-Fi networks operating in the 2.4 GHz and 5 GHz bands. It also benefits from lower energy consumption, allowing the creation of large groups of stations or sensors that cooperate to share signals, supporting the concept of the Internet of Things (IoT). The protocol's low power consumption competes with Bluetooth and has the added benefit of higher data rates and wider coverage range.

Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless communications. It combines multiple-input, multiple-output (MIMO) technology, which multiplies capacity by transmitting different signals over multiple antennas, and orthogonal frequency-division multiplexing (OFDM), which divides a radio channel into a large number of closely spaced subchannels to provide more reliable communications at high speeds. Research conducted during the mid-1990s showed that while MIMO can be used with other popular air interfaces such as time-division multiple access (TDMA) and code-division multiple access (CDMA), the combination of MIMO and OFDM is most practical at higher data rates.

References

  1. "WiMAX™ operators and vendors from around the world announce new deployments, growing commitments at the 2nd Annual WiMAX Forum® Global Congress". News release. WiMAX Forum. June 4, 2009. Retrieved August 20, 2011.
  2. "IEEE Approves IEEE 802.16m – Advanced Mobile Broadband Wireless Standard". News release. IEEE Standards Association. March 31, 2011. Retrieved August 20, 2011.
  3. Michael Richardson; Patrick Ryan (March 19, 2006). "WiMAX: Opportunity or Hype?". Advances in Telecom: Proceedings of the Fourth Annual ITERA Conference. SSRN   892260 .