What is cell selection? What is the criteria for cell selection? After selecting a PLMN UE need to select a cell to obtain normal or emergency service. Cell selection procedure is divided into two types Initial cell selection : When UE does not have any prior knowledge about RF channels in UTRA band or Stored information cell selection: This procedure (more ..)
What is a reserved cell? How to check if 3GPP cell is reserved? A cell is reserved if it is indicated as reserved in RRC System Information Block type 3. Following exceptions to these definitions are applicable for UEs: Camped on a cell that belongs to a LA that is forbidden for regional provision of service, and during emergency calls. (more ..)
What is a suitable cell? What are the minimum criteria for 3G suitable cells? A suitable cell in UTRAN system is a cell on which UE can camp on and obtain normal services like voice call and packet call. If UE can not get normal services from the particular cell after camping then it is not considered as a suitable (more ..)
What makes a cell acceptable in 3G UMTS system? In acceptable cell UE can camp and make emergency call and receive ETWS notifications if it is supported. An acceptable cell should fulfill the following requirements to make emergency call and receive ETWS primary notifications with or without security support. An 3GPP acceptable cell should not be a barred cell All (more ..)
What is 3GPP? Why 3GPP Exists? 3GPP stands for 3rd generation partnership project. 3GPP combines six telecommunication standardardization groups (ARIB, ATIS, CCSA, ETSI, TTA, TTC) to produce specifications and reports for different 3GPP technologies like 3G (UMTS), HSPA, LTE, LTE Advanced, etc. 3GPP has for technical specification groups. Those are Radio Access Networks (RAN), Service & Systems Aspects (SA), Core (more ..)
This tutorial describe details of LTE CSBF : Circuit Switch Fall Back, which is essential for early adaptation of voice over LTE network. LTE was made for packet based services. But a majority part of today’s traffic originates from CS based services like Voice and SMS. Therefore 3GPP agreed to include an intermediate solution for CS (Circuit Switch) based services until IP-based services like VoLTE (more ..)
Voice Over LTE – VoLTE is the technology which will drive the future of voice call over next generation mobile networks and it will replace legacy circuit switched call technology. But recent studies made by Metrico Wireless give some scary results for mass implementation of VoLTE. The worst part is that VoLTE calls consumes more than twice battery power than (more ..)