GSM technology, GSM RF optimization, GSM Planning and How GSM Works.
Definition and works of Interleaving in GSM The Definition of Interleaving is simply encode logical channel for error protection and security.lets understand how interleaving works in gsm. Having encoded, or error protected the logical channel, the next step is to build its bit stream into bursts that can then be transmitted within the TDMA frame structure. … Read more
To protect the logical channels from transmission errors introduced by the radio path, many different coding schemes are used. The diagram below illustrates the coding process for speech, control and data channels; the sequence is very complex. The coding and interleaving schemes depend on the type of logical channel to be encoded. All logical channels … Read more
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
How 26 and 51 Multiframes in GSM GSM is very complicated when we talk about its rf side and in it very complicated to understand the structure of 26 and 51 Multiframes, here my try to make you understand simply. The 26-frame Traffic Channel Multiframe in GSM The Below Figure shows the time relationship between … Read more
What is Echo Canceller and why it require in GSM – as from name Echo canceller is nothing but the process to remove duplicate signal or delayed signal, let’s see how it in GSM. An EC is used on the PSTN side of the MSC for all voice circuits. Echo control is required at the … Read more
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, it performs the “authentication” function. It will normally be co-located with the Home Location Register … Read more
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 in detail HLR and VLR in Function in telecom. HLR and VLR definition and function for GSM and LTE in telecom … Read more
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
Here I write about GSM RF Optimization Step by Step and how to find KPI degradation and its solution. The RF network optimization process can be categorized by the following steps: Problem analysis Analyzing performance retrieved from tool reports and statistics for the worst performing BSCs and/or Sites Viewing ARQ reports for BSC/Site performance trends … Read more
The Mobile Equipment and SIM are the only parts of the GSM network which the subscriber will really see. Let’s see what inside it. GSM Mobile Equipment There are three main types of ME, these are listed below: Vehicle Mounted These devices are mounted in a vehicle and the antenna is physically mounted on the … Read more