What is GSM radio interface?
The GSM radio interface is based on a TDMA structure with eight time slots and 200 kHz carrier bandwidth. To increase data rates, today’s GPRS and EDGE terminals can use multiple time slots for transmission, reception, or both.
What are the different interfaces used in GSM?
GSM Interfaces
| Interface | Network location |
|---|---|
| H interface | Between the MSC and the SMS Gateway. Used for transmitting SMS over the circuit switched network |
| I interface | Between the MSC and handsets in the network. Messages exchanged over the I interface are relayed transparently through the BSS |
What is the basic structure of GSM?
The GSM architecture consists of three major interconnected subsystems that interact with themselves and with users through certain network interface. The subsystems are Base Station Subsystem (BSS), Network Switching Subsystem (NSS) and Operational Support Subsystem (OSS).
What is meant by radio interface?
radio interface: The common boundary between a mobile station and the radio equipment in the network, which is the boundary defined by functional characteristics, physical interconnection characteristics, signal characteristics, and other characteristics as appropriate.
What is normal burst?
The normal burst carries traffic channels and all types of control channels. Frequency Correction Burst. This burst carries FCCH downlink to correct the frequency of the MS’s local oscillator, effectively locking it to that of the BTS.
What is GSM burst?
The slot is then the time that is allocated to the particular user, and the GSM burst is the transmission that is made in this time. Each GSM slot, and hence each GSM burst lasts for 0.577 mS (15/26 mS). Eight of these burst periods are grouped into what is known as a TDMA frame.
Which modulation technique is used in GSM?
Gaussian Minimum Shift Keying
The technology behind the Global System for Mobile communication (GSMTM) uses Gaussian Minimum Shift Keying (GMSK) modulation a variant of Phase Shift Keying (PSK) with Time Division Multiple Access (TDMA) signalling over Frequency Division Duplex (FDD) carriers.
What is 2G interface?
A interface The A interface is used to provide communication between the BSS and the MSC. The interface carries information to enable the channels, timeslots and the like to be allocated to the mobile equipments being serviced by the BSSs.
Is GSM 2G or 3g?
GSM is a second-generation (2G) standard employing time-division multiple-access (TDMA) spectrum-sharing, issued by the European Telecommunications Standards Institute (ETSI).
Which modulation technique is used by GSM?
What is LTE radio interface?
LTE (Long Term Evolution) or the E-UTRAN (Evolved Universal Terrestrial Access Network), introduced in 3GPP R8, is the access part of the Evolved Packet System (EPS). The LTE wireless interface is incompatible with 2G and 3G networks, so that it must be operated on a separate wireless spectrum.
What is the duration of guard time in GSM?
Introduction. The GSM standard [1] specifies a TDMA frame as a combination of 8 time slots. Each time slot has a duration of 3/5200 seconds (about 0.577 ms) and a time slot number (TN) from 0 to 7. GSM frames use GMSK modulation, where one symbol is equivalent to one bit.