Briefly differentiate between CDMA and GSM technologies.
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CDMA |
GSM |
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1)Code Division Multiple Access |
1) Global System for Mobile communication |
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2) storage type is internal memory |
2) storage type is SIM card |
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3) data transfer is EVDO/3G/4G/LTE |
3) data transfer is GPRS/E/3G/4G/LTE |
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4) It has a single frequency band(850 MHz) |
4) it has multiple frequency band(850/900/1800/1900 MHz) |
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5) It's not much easier to swap phones on CDMA networks |
5) It's much easier to swap phones on GSM networks |
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6)It uses code division multiplexing |
6) it uses time division multiplexing |
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7) There is one physical channel and a special code for every device in the coverage network. Using this code, the signal of the device is multiplexed, and the same physical channel is used to send the signal. |
7) Every cell has a corresponding network tower, which serves the mobile phones in that cellular area. |
What is multiple access technique? Do a comparative study among FDMA,TDMA and CDMA.
Briefly describe the congestion control, slow start and fast retransmit mechanism.
Define Quality Planning
What is Risk? Why Risk Analysis is done?
Explain left factoring with suitable example.
What are the methodology for dialog design?
