WIRELESS NETWORKS AND MOBILE IP
WIRELESS NETWORKS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Time Domain Multiple Access
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Time-Division Multiple Access
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Tone Division Multiple Access
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none of the above
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Detailed explanation-1: -Digital modulation technique that allocates a discrete amount of frequency bandwidth to each user to permit many simultaneous conversations. Each caller is assigned a specific time slot for transmission. TDMA provides improved spectral efficiencies over analog systems.
Detailed explanation-2: -While TDMA is a subset of TDM in which multiple transmitters are connected to a single receiver. TDMA is commonly used in 2G and 3G cell phone systems and even for high-speed local area networking area. This is the reason why TDMA is used for uplink (reverse link) and TDM for downlink (forward link).
Detailed explanation-3: -TDMA requires a centralized control node, whose primary function is to transmit a periodic reference burst that defines a frame and forces a measure of synchronization of all the users. The frame so-defined is divided into time slots, and each user is assigned a Time Slot in which to transmit its information.