Tag Archives: gsm rf planning

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 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 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…

Radio Link Control RLC in LTE

Here i write about Radio Link Control -RLC in LTE in a simple word. The RLC layer is located between the PDCP ( the “top” layer) layer and MAC layer (the “lower” layer). Communicates with the PDCP layer through a…

How Seamless Handover in LTE

Here i write very small notes about How Seamless Handover in LTE which is very basic and some require techniques for real time data handover in LTE. Seamless handover is applied for user plane radio bearers mapped on RLC unacknowledged…

What is Principle of RF Hopping in GSM

In RF Hopping mode, each route of service information is processed by fixed base band unit and and carrier frequency processing unit, while the working frequency carrier of carrier frequency processing unit is provided by frequency synthesizer. Under the control…

What is The Advantages of Frequency Hopping in GSM

Hopping can lower many kinds of interferences, such as co-channel interference, adjacent channel interference, inter modulation interference, etc. Hopping turns the consecutive long time interference of mobile station into discontinuous interference of single burst, and such interference can be greatly…

What is the accurate way of setting the RxLevAccessMin parameter

RxLevAccessMin Parameter is decide to allow mobile to access Network.its also used to reduce access on any BTS. RxLevAccessMin = Mobile Sensitivity + Body loss + Multipath loss + Interference Margin Mobile Sensitivity = -104 for GSM900 and -102 for…

How Cell Selection in GSM

Once the mobile is switched on and the registered home PLMN was selected (e.x. SMART), it will next search for a BCCH frequency list, stored in its memory or in its SIM card. The list can have up to 32…

Work of MA, HSN and MAIO in GSM

Mobile Allocation The MA is a list of hopping frequencies transmitted to a mobile every time it is assigned to a hopping physical channel. The MA-list is a subset of the CA list. The MA-list is automatically generated if the…

What is Cell Allocation in GSM

The Cell Allocation (CA) is a list of all the frequencies allocated to a cell. The CA is transmitted regularly on the BCCH. Usually it is also included in the signaling messages that command the mobile to start using a…