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What is Burst in GSM and Burst Types in GSM

What is Burst in GSM and Burst Types in GSM The Below a GSM burst. It consists of several different elements. These elements are as below: This is the area in which the speech, data or control information is held. Side effects Guard Period The BTS and MS can only receive the burst and decode … Read more

Timing Advance in GSM

Timing Advance in GSM Transmission delay is unavoidable in the radio interface. If the mobile station moves away from the base station during a call, the further distance the more delay. The uplink is as the same. If the delay is too high, the timeslots of the signal from a certain mobile station and that … Read more

What is BSIC and its use in GSM

What is BSIC and its use in GSM BSIC=NCC+BCC In GSM system, each BTS is allocated with a color code, which is called BSIC. MS can identify two cells with the same BCCH by the help of BSIC. In network planning, effort should be made to make sure that BCCH of neighbor cells are different … Read more

What is Use of LAC in GSM

What is Use of LAC in GSM Location Area Code(LAC) :  To locate the location of MS, the whole area covered by each GSM PLMN is divided into different location areas. LAC is used to identify different location areas. LAI contains LAC, which is composed of two bytes. LAC adopts hexadecimal coding. The available range … Read more

Why and How BSIC Planning in GSM

Why and How BSIC Planning in GSM Why BSIC Planning in GSM ? Because when tight frequency planning required or we have very limited frequency to plan then to reduce Mobile confusion about cell id BSIC used to identify cell id after BCCH. lets understand How BSIC Planning in GSM? In addition to the assignment of frequency … Read more

GSM Underlaid Overlaid Frequency Allocation and Configuration

GSM Underlaid Overlaid Frequency Allocation and Configuration Underlaid Overlaid  Frequency Allocation In the Overlaid/Underlaid technology, all frequency carriers in the cell are divided into two parts, of which the TRX power of some frequency carriers is lowered, then two Overlaid/Underlaid with different coverage appear, as shown in the below figure. The frequency carriers used by … Read more

BCH,CCCH and DCCH Channel of GSM

BCH,CCCH and DCCH Channel of GSM BCH (Broadcast Channels) BCCH(Broadcast Control Channels) Downlink Only. Broadcast information of the serving cell (System Information). Transmitted on timeslot zero of BCCH carrier. Read only by idle mobile at least once every 30 secs. SCH (Synchronization Channels) Downlink Only Carries information for frame synchronization. Contains frame number and BSIC … Read more

Requirement for Interference and Carrier to Interference Ratio in GSM

Requirement for Interference and Carrier to Interference Ratio in GSM GSM is an interference restricted system. Carrier-to-interference ratio (C/I), also called interference protection ratio, refers to the ratio of all useful signals to all useless signals. In GSM system, this ratio is relevant to the instantaneous location and time of MS due to irregular landform, … Read more

Definition and Effect of Reflection, Diffraction, Scattering and Multipath Propagation in RF Engineering

Definition and Effect of Reflection, Diffraction, Scattering and Multipath Propagation in RF Engineering Reflection Diffraction and Scattering in wireless communication When any new site has been planned then it should be such a way the effect of Reflection, Diffraction, Scattering and Multipath should be Balance. Reflection in wireless communication Reflections Occurs when a wave impinges upon … Read more

Basic of GSM Um,Abis and A Interface

Basic of GSM Um,Abis and A Interface GSM (Um) Air Interface This is the interface between the GSM mobile station and the GSM Base station. The Air interface (RF Interface) uses the Time Division Multiple Access (TDMA) technique to transmit and receive traffic and signaling information between the GSM BTS and GSM Mobile Station. The … Read more