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Frequency-division multiple access (FDMA) is a channel access method used in some multiple-access protocols. FDMA allows multiple users to send data through a single communication channel, such as a coaxial cable or microwave beam, by dividing the bandwidth of the channel into separate non-overlapping frequency sub-channels and allocating each sub-channel to a separate user.
Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. Originally known as Carrier Interferometry , it is also called linearly precoded OFDMA ( LP-OFDMA ). Like other multiple access schemes (TDMA, FDMA, CDMA, OFDMA), it deals with the assignment of multiple users to a shared communication resource.
SNA—Systems Network Architecture; SNMP—Simple Network Management Protocol; SNTP—Simple Network Time Protocol; SOA—Service-Oriented Architecture; SOAP—Simple Object Access Protocol; SOAP—Symbolic Optimal Assembly Program; SOPA—Stop Online Piracy Act; SoC—System-on-a-Chip; SO-DIMM—Small Outline DIMM; SOE—Standard Operating ...
The mobile transmits at the beginning of the time slot as received from the network. If the mobile is near the base station, the propagation delay is short and the initiation can succeed. If, however, the mobile phone is just less than 35 km from the base station, the delay will mean the mobile's transmission arrives at the end of the time slot.
Network architecture is the design of a computer network.It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as communication protocols used.
CT2 was deployed in a number of countries, including Britain and France. In Britain, the Ferranti Zonephone system was the first public network to go live in 1989, and the much larger Rabbit network – backed by Hong Kong's Hutchison Telecommunications – operated from 1992 to 1993. [4] In France, the Bi-Bop network ran
Over the decades he has researched and developed emerging fields of computer science from compilers, programming languages, and system architecture [4] to artificial intelligence and knowledge representation. In the 1990s Sowa was associated with the IBM Educational Center in New York.
Systems Network Architecture [1] (SNA) is IBM's proprietary networking architecture, created in 1974. [2] It is a complete protocol stack for interconnecting computers and their resources. SNA describes formats and protocols but, in itself, is not a piece of software.