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How Header Compression in LTE

One of the main functions of the PDCP header compression is using Header Compression (ROHC) robust protocol defined by IETF (Internet Engineering Task Force) . In LTE, header compression is very important because there is no support for transport of voice circuit-switched (CS) domain. Thus in order to provide voice services (PS ) domain Packet … Read more

How UE Access Restrictions to Cell

The UE carried out a restriction of access check during connection establishment. This function provides a means of controlling traffic load from the EU. There are separate facilities for control of Mobile originated (MO) calls and signaling. On top of regular class, parental control, specific Access Control Services (SSAC) can be applied. SSAC facilitates separate … Read more

How Measurement Report Triggering in LTE UE

Depending on the type of measurement, the UE can measure and report any of the following: serving cell; list of cells (e.g., cells shown as part of the object of measurement); cells are found at the frequency set (ie cells are the cells that are not listed, but found UE). For some rats, the UE … Read more

Small notes on Connection Re-Establishment Procedure in LTE

Here I write some small notes on connection Re-Establishment procedure in LTE. In a number of cases of failure (eg failure of radio link failure of teaching RLC unrecoverable error, failure of compliance reconfiguration), the procedure for restoring EU RRC connection, provided that security is active. If security is not enabled, when one of the … Read more

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 BCCH frequencies for the mobile to scan. This reduces the time of cell selection, compared … Read more

Pri Selection Site or RF planning First point

Which step to make clear before select any site at any location like equipment type, construction and link balance calculation which describe detail as below. Select Equipment Type For Site Select equipment for the cell depending on channel requirements Selection of antenna type and accessories. Locate Equipment On Site For Construction Drawing Plan of the … Read more

Step to Select any Site in RF Planning

Here I write about selection of new site in rf planning, how step by step any new site planned is as per below. Prepare Initial Search Ring Note the latitude and longitude from planning tool. Get the address of the area from mapping software. Release the search ring with details like radius of search ring, … Read more

Effect of DTX in RX Quality distribution

DTX has some effect on the RXQual distribution. Normally the BER is averaged over the duration of one SACCH frame lasting 0.48 seconds and consisting of 104 TDMA frames. However, four of these TDMA frames are used for measurements, so that only 100 bursts are actually transmitted and received. When DTX is in use and … Read more