A few weeks ago I was looking into an issue related to E911 or Emergency call over the IMS network. Though it appears as most of the concepts related to emergency calls are still same in IMS as compared to legacy systems, such as 3G and GSM, there are many new things are added for IMS. Both in UMTS and (more ..)
This tutorial describes the specific details of the LTE MAC layer or the Medium Access Control protocol. MAC is a radio network protocol which resides both in the UE and in the E-UTRAN. Also, it should be noted that MAC protocol is available for both User plane and also for the control plane. RRC (Radio Resource Control) protocol is in (more ..)
When the best data throughput of today becomes bad in couple of years and mobiles are used more as entertainment and file sharing purpose than voice call, we need new revolutions to achieve best data rate using existing technologies. According to latest study by Qualcomm by 2017 two third of mobile traffic will be from video. There is also predictions (more ..)
Apple announced iOS 8 early this week in a grand event. While there are many visual and other non-wireless features presented in WWDC 2014 there was definitely some parts which was for us those who work in mobile space. Apple announced that they will support WiFi calling in IOS 8 and that is a welcome move. But as we all (more ..)
When LTE system was developed one of the big technical feature from UMTS Soft/Softer handover was missing from the architecture. There are many specific reasons why LTE dropped altogether soft handover (connect-before-break) from the system design. Before discussing about why LTE skipped soft handover and only implemented hard handover, let’s check the basic concept of soft/softer handover.
The term 3GPP specification covers all GSM (including GPRS and EDGE), W-CDMA (including HSPA) and LTE (including LTE-Advanced) specifications. Along with that network side terminology such as UTRAN, IMS, FOMA (in Japan) are also covered by 3GPP specifications. Each 3gpp specifications have their unique numbers. Though these numbers look complicated and unnecessary, they have their own significance. Assigning a unique (more ..)
Self Organizing Network helps in reducing the system overload in an automated way. This new video from Ericsson describes what is SON and how Self Organizing Network will help not only LTE but also in older technologies like 3G and 2G. Automation creates value within the network and self organizing networks are increasingly important not only to lower costs of (more ..)