GSM

GSM technology, GSM RF optimization, GSM Planning and How GSM Works.

What is HLR and VLR and its function in GSM

Hlr and Vlr in Mobile Communication As From the Name VLR means Visitor Location Register and HLR means Home Location Register so HLR having all detail of subscriber and VLR having temporary details for mainly call processing related. Let’s check…

What is FADING, Its Type and Effect in RF design

What is Fading: – Fading is most important thing when you design any RF Design lets understand what is fading and how its effect. The communication between the base station and mobile station in mobile systems is mostly non-LOS. The…

Slow and Fast Frequency Hopping in GSM

Frequency hopping can be briefly defined as a sequential change of carrier frequency on the radio link between the mobile and the base station. In GSM, one carrier frequency is divided into eight time slots. Each time slot provides one…

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…

What is MNC and MCC for GSM

MCC MNC – Telecom What is mcc and mnc :- Both are very first question in your mind when you start learning on telecom its basic behind numbering system in telecom lets understand each one in details. MNC full form in…

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…

How Authentication Center (AUC) works in GSM

When we talk about Mobile Business then its worst useful without authentication means to make Network as business all user required to be authenticate lets understand how authentication done in gsm. Authentication Center (AUC) The AUC is a processor system,…

Network Color Code NCC for GSM

NCC is a part of BSIC. MS uses it to distinguish adjacent BTS that belong to different GSM PLMN. NCC is composed of 3 bits, with the range of 0 to 7. NCC and BCC together form the base station…

Dedicated Control Channel (DCCH) in GSM

SDCCH (Stand-alone Dedicated Control Channel) Uplink and Downlink. Used for call setup, authentication, ciphering location update and SMS. SACCH (Slow Associated Control Channel) Downlink and Uplink. Used to transfer signal while MS have ongoing conversation on traffic or while SDCCH…

BCH ,CBCH and CCCH works in GSM

Broadcast Channels (BCH) Frequency correction channel (FCCH) the “lighthouse” of a BTS Synchronization channel (SCH) PLMN/base identifier of a BTS plus synchronization information (frame number)  Broadcast control channel (BCCH) to transmit system information 1-4, 7-8 (differs in GSM 900, 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…

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…