A communications technique that uses a common channel (multipoint or broadcast) for communications among multiple users by allocating unique time slots to different users. TDMA is used extensively in satellite systems, local area networks, physical security systems, and combat-net radio systems.
A method of digital wireless transmission that allows a large number of users to share access (in a time ordered sequence) to a single radio frequency channel without interference by assigning unique time slots to each user within the channel
(TDMA): An accessing technique that allows separate communications sources to share the same telecommunications channel. Each user site has a time slot allocated during which data for that site may be transmitted or received.
A method of digital wireless communications transmission allowing a large number of users to access (in sequence) a single radio frequency channel without interference by allocating unique time slots to each user within each channel
A digital radio technology that divides each frequency channel into separate time slots for separate conversations or sessions.
A form of over-the-air, multiple access where many users share a finite frequency.
Aka Frequency Division Multiple Access (FDMA) - Another name for time division multiplexing; only TDMA or FDMA can multiplex signals together over a transmission frequency, used in spread spectrum cellular radios/transmitters by the cellular telephone industry.
A digital multiplexing technique whereby each signal is sent and received at a fixed time slots in a series of time slots. The transmitter and receiver must be time-synchronized. Public telephone networks typically use TDMA.
A process of sharing a cellular channel by sharing time slots or intervals between users. Each user is assigned a specific time interval.
A medium access control scheme where each member of a device population is assigned transmission slots separated in time.
Data multiplexing scheme used as the basis for all digital switching networks and Central Office switches. Each 8 kHz sample of an analogue signal from a given phone line or channel is coded into 8 bits of digital information. These are then time multiplexed into successive bytes of data within a digital bus or channel of data.
A satellite and cellular phone technology that interleaves multipledigital signals onto a single high-speed channel. For cellular, TDMA triples the capacity of the original analog method (FDMA). It divides each channel into three subchannels providing service to three users instead of one. See also CDMA.
A digital transmission technique in which a radio frequency is divided into time slots that are allocated to multiple calls. In this way, a single frequency can support multiple, simultaneous data channels.
A type of air interface which describes a technique of adding signal carrying capacity by breaking up each frequency allocation into multiple time slots and assigning each signal a specific slot.
A multiple access scheme that uses time slots as traffic channels in a common radio channel.
A satellite transmission method. A TDMA relay is particularly efficient since it enables a number of earth stations to share the same satellite transponder. It is also a dynamic system since it can be modified to comply with the variable traffic demands of the different earth station in the network. Thus, if a station's traffic increases for a given time period, the additional information could be accommodated.
System for digital cellular service that increases capacity by multiplexing, or time-slicing, a radio signal. TDMA improves cellular calling capacity by 300 percent, and improves security because it cannot be picked up "in the clear" by an ordinary radio. Note: The U.S. cellular industry has endorsed TDMA as its choice for cellular upgrades, and some TDMA systems are being installed in major markets. All these TDMA systems are "dual standard" equipment, so analog phones, cell sites, and switches work in TDMA networks.
2G technology developed in the US. Divides each cellular channel into three (GSM has eight) time slots in order to increase the amount of data that can be carried. Each user making a call is allocated a particular time slot, which he occupies for the duration of the call. TDMA-based cellular systems include European GSM, Japanese PDC and North American D-AMPS. However, each of these systems implements TDMA in a different and incompatible way. (See also CDMA and FDMA.)
A method of digital wireless communications transmission allowing a large number of users to access a single radio-frequency channel without interference. Each user is given a unique time slot within each channel. SMS Mobile Originate has now gone live on several TDMA networks around the world including Telecom New Zealand, Midwest Wireless USA, Algar Telecom Brazil and Cellcom Israel. Other TDMA network operators such as AT&T Wireless in the U.S. have launched SMS nationally.