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From page 84... ... 84 A P P E N D I X C IEEE Family of Standards The Institute of Electrical and Electronics Engineers (IEEE) 802 committee has developed a family of wireless standards that have become dominant in the unlicensed industrial, scientific, and medical (ISM) Read the entire page →
From page 85... ... IEEE 802 Standards 85 IEEE 802 LAN/MAN IEEE 802.16 Wireless MAN IEEE 802.20 Wireless WMAN IEEE 802.11 Wireless LAN IEEE 802.22 Wireless RAN IEEE 802.15 Wireless PAN IEEE 802.15.1 WPAN IEEE 802.15.3 High-Rate WPAN IEEE 802.15.4 Low-Rate WPAN IEEE 802.15.6 BAN Frequency Band(s) 2.3 GHz 2.5 GHz Uses WiMax Frequency Band(s) Read the entire page →
From page 86... ... 86 A Guidebook for Mitigating Disruptive WiFi Interference at Airports MIMO uses multiple receivers, transmitters, and antennas to achieve spatial division multiplexing (SDM) Read the entire page →
From page 87... ... IEEE 802 Standards 87 • WirelessHART • MiWi Each of these protocols differentiate themselves in how they develop the upper layers but have in common the lower layers, as defined in IEEE 802.15.4. IEEE 802.15.4 was first released in 2003 with a new version released in 2006 and work continuing on future revisions. Read the entire page →
From page 88... ... 88 A Guidebook for Mitigating Disruptive WiFi Interference at Airports 22 Table from: http://www.intel.com/standards/case/case_802_11.htm Year Version Band Data Rate Purpose 1997 802.11 2.4 2 Mbps The original wireless local area network (WLAN) standard. Read the entire page →
From page 89... ... IEEE 802 Standards 89 Modulation and Coding Schemes To achieve their higher data rates, the newer versions of the IEEE 802.11 standards support a number of modulation schemes and coding rates. These are defined by the standard and are represented by a modulation and coding scheme (MCS) Read the entire page →
From page 90... ... 90 A Guidebook for Mitigating Disruptive WiFi Interference at Airports A total of approximately 18.7 billion WiFi chipset units will be shipped from 2011 to 2017 -- nearly all of which will belong to the high-performance 802.11n version. By 2015, nearly 1.2 billion handsets out of a total of 1.9 billion cellphones produced that year will include WiFi functionality. Read the entire page →
From page 91... ... IEEE 802 Standards 91 • 256-QAM, rate 3/4 and 5/6 modulation added as optional modes (vs. 64-QAM, rate 5/6 maximum in 802.11n) Read the entire page →
From page 92... ... 92 A Guidebook for Mitigating Disruptive WiFi Interference at Airports • "60 GHz is also highly directional," he added. "So whereas in 2.4 and 5 [GHz] Read the entire page →
From page 93... ... IEEE 802 Standards 93 IEEE 802.11af IEEE 802.11af, approved in February 2014, allows wireless local area network operation in TV white space spectrum in the VHF and UHF bands between 54 and 790 MHz. Because of its operation in the TV white space, meaning on locally unused TV channels, the standard is often referred to as White-Fi and Super WiFi. Read the entire page →
From page 94... ... 94 A Guidebook for Mitigating Disruptive WiFi Interference at Airports Positively, the trend toward band fragmentation makes available more spectrum in which to operate. However, it also creates a complex matrix of possible interference problems. Read the entire page →
From page 95... ... IEEE 802 Standards 95 and the guard interval. In IEEE 802.11 a/g OFDM, the data or symbol rate is 250 kHz, or 4 µS. Read the entire page →
From page 96... ... 96 A Guidebook for Mitigating Disruptive WiFi Interference at Airports Figure C-3. Modulation and coding schemes used by IEEE 802.11 n/ac.34 WiFi and cellular signaling combinations may operate in close proximity without any problem. Read the entire page →
From page 97... ... IEEE 802 Standards 97 A potential for interference that appears particularly concerning is created by the approaching use by LTE of the bands adjacent to the 2.4 GHz ISM band, which WiFi uses so heavily. Mobile phones and other LTE UE devices operating either below or above the 2.4 GHz ISM band have the potential for interfering with WiFi (Figure C-4) Read the entire page →
From page 98... ... 98 A Guidebook for Mitigating Disruptive WiFi Interference at Airports Freescale would not be making the significant investment that developing a new product requires if their customers didn't need it. Clearly Freescale is hearing that customers are planning on building mobile network basestations for the 2496–2690 MHz band, just above the 2.4 GHz ISM band where so much WiFi operates. Read the entire page →
From page 99... ... Abbreviations and acronyms used without deﬁnitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) Read the entire page →

From page 84...

... 84 A P P E N D I X C IEEE Family of Standards The Institute of Electrical and Electronics Engineers (IEEE) 802 committee has developed a family of wireless standards that have become dominant in the unlicensed industrial, scientific, and medical (ISM)