Time Division Multiple Access

Network communication terminology

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synonym TDMA (TDMA) generally refers to time division multiple access

This entry is made by Compilation and application of scientific encyclopedia entries of "Science Popularization China" to examine.

Time division multiple access (TDMA) is a kind of shared transmission media (generally radio Domain) or network communication technology. It allows multiple users in different time slices（ Time slot ）To use the same frequency 。 Users transmit quickly, one by one, and each user uses their own time slice. This allows multiple users to share the same transmission media (e.g. radio frequency).

TDMA usually refers to the second generation in the United States（ 2G ） Mobile phone Standards, specifically IS-136 perhaps D-AMPS These standards use TDMA technology for time-sharing carrier Bandwidth of.

Chinese name: Time Division Multiple Access
Foreign name: time division multiple access

Purpose: Send signal to base station
Substantive: Split time into periodic frames

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Introduction to TDMA

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Time Division Multiple Access (Time division multiple access, abbreviation: TDMA ）It is used to share transmission media (generally radio Domain) or network communication technology. It allows multiple users in different time slices（ Time slot ）To use the same frequency 。 Users transmit quickly, one by one, and each user uses their own time slice. This allows multiple users to share the same transmission media (e.g. radio frequency).

TDMA In the United States, it usually refers to the second generation（ 2G ） Mobile phone Standards, specifically IS-136 perhaps D-AMPS These standards use TDMA technology for time-sharing carrier Bandwidth of.

TDMA Features

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Multiple users share one carrier frequency
Discontinuous transmission makes switching easier
Time slots can be allocated according to the requirements of dynamic TDMA
Due to the small inter cell interference CDMA More relaxed power control
Higher than CDMA synchronization overhead
Complexity of frequency allocation^[1]

TDMA application

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TDMA in Mobile Phone System

2G system

2G system mainly uses two systems, one is composed of European Telecommunications Standardization Association Proposed GSM (global system for mobile communications) (later became the global cellular radio communication system standard), mainly including GSM, DCS1800 and PCS1900 systems. More than one billion people in more than 200 countries and regions are using GSM phones. In the People's Republic of China China Mobile and China Unicom Operate GSM network.

The other is called IS-95 , its core patent is from the United States Qualcomm Holding. stay The People's Republic of China from China Unicom Operate its evolving CDMA2000 1X network (handed over China Telecom Become its 3G network).^[1]

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Frequency division multiplexing （Frequency-division multiple access，FDMA）
Code division multiplexing （Code division multiple access，CDMA）
GSM
2G

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