DATA LINK LAYER WIRED NETWORKS
MULTIPLE ACCESS PROTOCOLS MAC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A TDMA system uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, how many simultaneous users can be accommodated?
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25
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200
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1600
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1000
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Explanation:
Detailed explanation-1: -Explanation: For a TDMA system that uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, 1000 simultaneous users can be accommodated as N = (25 MHz)/(200 kHz/8).
Detailed explanation-2: -If 8 speech channels are supported on a single radio channel and assume that there are no guard band is applied, find the number of simultaneous users that can be accommodated in GSM. [Answer:1000]
Detailed explanation-3: -In TDMA-based systems, guard times of 30-50 microseconds between time slots are commonly used. Synchronization is also necessary in TDMA due to the burst mode of data transmission.
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