Mobile Telecommunications Networks

Only 1, 2, 3 & 5 are correct. UWB has high bandwidth and high data rate.

This is a supplementary service of GSM network.

This standard of IEEE defines radio resource measurement enhancements.

This interface in GSM PLMN architecture provides radio connection between mobile station and base transceiver station.

Guard bands are unused frequency ranges placed between channels in Frequency Division Multiplexing (FDM) to prevent interference (crosstalk) between adjacent channels. They increase the total required bandwidth because each channel occupies more spectrum than its signal bandwidth alone. Time Division Multiplexing (TDM) uses time slots, not frequency bands, so guard bands don't apply to TDM.

FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA (Code Division Multiple Access) are all channelization protocols. They divide the available communication resource into channels - by frequency, time slots, or codes respectively.

These are incorrect statements.

A cell is a basic geographic service area of wireless communication system.

In this process, the old base station drops the telephone before the new base station acquires the telephone.

This channel is used for location updating, registration call setup and is used to send the information about maintaining the base station.

Both GSM and EDGE use the TDMA (Time Division Multiple Access) frame structure as their fundamental multiple access technology, with EDGE being an enhancement of the GSM standard.

In this feature of mobile device, mobile network operators should be able to scale services to customer needs.

This subsystem consist of a base transceiver station located at the antenna site and base station controller, which may control several BTS's.

This feature of wireless application provides for maximum number of users for a given network configuration.