Standards in International Telecommunications ISOM 591 February 28, 2000

Why Nations Cooperate n Need universal standards to interconnect national networks n promote economies of scale, thus reducing transaction costs n derive logistical benefits for their citizens n ensure that terrestrial facilities and satellites can operate unimpeded n act as good “global citizens”

The Management of Frequency Allocation Power and Telephone Radio and television MicrowaveInfraredVisible light Frequency Hz Twisted pair Coaxial cable Optical fiber Cell phone

Key Frequency Bands for Wireless n High Frequency HF3-30 MHz n Very High Frequency VHF MHz n Ultra High Frequency UHF MHz n Super High Frequency SHF3-30 GHz –microwave n Extremely High Frequency EHF GHz Frequencies below HF are limited in bandwidth

Where the Action Is n Radio and TV broadcasters, mobile trucking and dispatching fleets, aeronautical and maritime communications, military communications, cellular communications, PCS, mobile satellites n VHF Very high frequency MHz n UHFUltra high frequency MHz n SHFSuper high frequency 3-30 GHz

Some Regulation n FCC’s Omnibus Budget Reconciliation Act of 1993 –process for auctioning off a major block of frequencies for narrow band and wide band PCS –50 MHz was allocated, with another 150 to follow over the next 15 years –Commercial Mobile Radio Services

Frequency Allocations n 3000 GHzunassigned n 300 GHzsatellite, microwave n 30GHzsatellite, microwave, radar n 3GHzmicrowave, UHF TV n 300 MHzamateur radio FM radio (88 MHz MHz) n 30 MHzcitizens band radio n 3 MHzradio navigation AM radio (500 KHz MHz)

Frequency Allocations 300 KHzradio navigation, maritime communications 3 KHzhuman voice 300 Hzsubmarine communications

Standards Organizations IFRB International Standards Organization International Telecommunications Union American National Standards Institute GS IRCCCCITT EIAIEEECOS Federal Telecoms Standard Committee NISTFCCDOF ECMACEPT

History of the ITU n ITU establishes common rules, regulations, standards, and policies in telecommunications n founded in 1865 when the Austro-German and Western European Telegraph Unions merged to supervise and establish standards for an interconnected regional network n consensus needed on Morse code and emergency frequencies

History of the ITU n 29 nations collaborated in 1906 to form the IRU (International Radiotelegraph Union) to coordinate usage, agree on frequency bands, register station operations, and resolve cases of radio interference n there is a story that a ship was in the area where the Titanic was sinking but the radio operator was off duty

History of the ITU n In 1947, the ITU voted to become a special agency of the United Nations system and expand its role to – allocate and monitor the use of frequency spectrum – promote the development of technical facilities – eliminate interference – facilitate worldwide standards – promote adoption of measures that ensure safety of life

ITU: Two Standards Making Bodies n CCITT –telephone and telegraph n CCIT –radio technologies n Does a split between wired and wireless make sense in today’s world?

History of the ITU n Three sectors – development of telecommunications facilities – telecommunications standardization – radiocommunication » management of the radio frequency spectrum including registering frequency assignments liable to cause interference outside a country and notices for orbital positions of satellites » major revisions in

Standards Committees of the ITU n International Frequency Regulation Board (IFRB) – ensures technical cooperation on radio frequency assignments, use of the frequency spectrum, positions of satellites n Consultative Committee for International Radio (CCIR) – responsible for standards concerning radio communications n General Secretariat – administers the Union’s headquarters

Standards Committees of the ITU n Consultative Committee for International Telephone and Telegraph (CCITT) is now the ITU-T – responsible for developing telephone and data communications including services, systems, and digital networks like ISDN – recommendations regarding telecom equipment, services – the V series which defines analog standards – the X series which defines digital and electrical interface standards between equipment

Standards Committees of the ITU n Consultative Committee for International Telephone and Telegraph (CCITT) is now the ITU-T – based in Geneva – membership consists of over 150 PPTs, private telecom companies, industrial and scientific organizations – ISO is a member of CCITT

Some Popular X and V Standards from CCITT n X.12ANSI standard for EDI n X.25interface standard for packet switching n X.400worldwide standard n X.500worldwide directory of addresses n V.32electrical standards for modems at 9600 baud n V.33electrical standards for 14.4 modem n V.42data compression standard

ITU Role in Satellite Orbital Slots n Need to avoid frequency interference – at current time, probability of collision is low because the closest spacing of 2 degrees is about a 900 mile separation – nations are allocated orbital slots n global cooperatives like IntelSat and Inmarasat have established satellite requirements n plays a fact-finding and conflict resolution role in the demand for scarce orbital slots

Geosynchronous Satellite Band 79 0 W Westar 1& W Satcom W Comstar W Westar W Comstar 1& W Westar W Amik B W Amik 2& W Satcom W Westar W Comstar W Satcom 3R W Satcom 1

Satellite Transmission of Voice Grade Circuits 14 GHz 12 GHz Hundreds of Voice grade circuits

ISO (The International Standards Organization) n Membership consists of about 90 national standards bodies, based in Geneva n promotes standards for worldwide use in a variety of fields, including electronics and electrical matters – created the OSI model for interconnectivity in networking (1978) – US representative is ANSI (American National Standards Insititue)

ETSI (European Telecommunications Standards Institute) n Founded in 1988 as part of the EEC (European Economic Community) with primary responsibility for broadcasting and teleommunications and shares responsibility for computer technology standards with existing standards groups

ETSI n Its is designed to – develop European telecom standards – use weighted voting from its 21 country membership – expand scope of membership beyond the PTTs to include manufacturers, users, service providers, and researchers

American National Standards Institute (ANSI) – volunteer organization consisting of about 900 equipment manufacturers and users of information technology – publishes national standards – developing FDDI standard for large backbone LANs using fiber optic cable

Other Standards Bodies n Electronics Industries Association (EIA) n Institute of Electrical and Electronics Engineers (IEEE) n National Institute of Standards and Technology (NIST) n Cooperation for Open Systems (COS) n Department of Defense and Federal Communications Commission are involved, too!