What is TDMA | Features | Applications | Advantages

Basic information about TDMA :

TDMA full form is Time Division Multiple Access is one type of with the multiple transmitters instead of once transmitter connected to one receiver. 

It is a channel access method used for the shared medium network used in cellular or telecommunication. 

It divides each cellular channel into three slots of time to increase the amount of data that can be carried.

Definition of TDMA :

Time-division multiple access (TDMA) is one type of multiple channel access method. In this method, each user allowed to transmit only in the specified time slot with a common frequency band. It allows several users can transmit to share the same frequency band at a different time, so each using its own time slot.

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Detailed analysis of a TDMA :

TDMA provides different users share time slots of the complete time available. It uses time instead of frequency. For each user allocated a different time slot in which the user can access the channel. For that in each slot, only one user allowed to transmit or receive. 

In TDMA system users transmit in rapid succession, and each one uses its own time slot.

The transmission from different users in interfaced into a repeating frame structure and transmitted data is in burst and buffer method.

A frame consist of a number of slot, each frame consists of a preamble, an information message and trail bits. Half of the time slot will be used for the forward link channels and the remaining half is for reverse link channels.

The preamble comprises the address and synchronization data. Such data used by both the base station and subscribers to identify each other.

TDMA system has identical frame structure so it can be used for forward or reverse transmission, but the carrier frequencies will be different for both the links.

Features of TDMA 

• Guard time needs to be minimized. 
• Shares a single carrier frequency with multiple users.  
• Less stringent power control.
• Non-continuous transmission makes handoff simpler. 
• Frequency/slot allocation complexity. 

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Application of TDMA :

• TDMA used in digital cellular telecommunication.
• Satellite system.
• It is used GSM, IS-136, iDEN.
• Dynamic TDMA used for packet mode communication.
• GSM uses TDMA in combination with FDMA offers a big advantage of TDMA.
• PON network also uses for upstream traffic from premises to the operator.
• TDMA also used as telephone communication.

For detailed information : 

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