LTE security architecture defines the security mechanism for both NAS layer and AS layer. No HO related security is covered in this document. LTE Security Distribution NAS security Carried out for NAS messages and belongs to the scope of UE and MME. In this case NAS message communication between UE and MME are Integrity protected and Ciphered with extra NAS (more ..)
GSM (Global System for Mobile Communication) is open digital cellular technology used for transmitting voice and providing data services. GSM supports voice traffic as well as data traffic in form of CSD (Circuit switched data) or HSCSD (High speed circuit switched data). Network Architecture GSM network is logically divided in two parts Access network (AN) and Core Network (CN). Access (more ..)
UE Initial Access is the process between an UE is switched on and before sending UE specific signaling or data. The different steps for initial access are described below. Cell Search and Selection Receive System information Random access procedure Cell Search and Selection In order to know the cell search and selection first we have to know the physical signals (more ..)
RRC Measurements Cheat Sheet (FDD) is a one page help guide. Cheat sheets are useful when debugging an issue or testing a test cases and you just need a quick look instead of going into the specification. In this document we have recorded all the RRC measurements and the meaning of those events. Please let us know what you think (more ..)
This is the Rohde & Schwarz LTE (E-UTRA) webinar. In this webinar basics of LTE technology are explained.
It is always good to have some technology resources. The best way to learn a new technology is to look the overall architecture first, like the end to end communication interfaces, protocols involved, radio interface technology involved, etc. After knowing the overall system architecture one can start going into details of system nodes. LTE is the latest technology to look (more ..)
System Information is divided into MasterInformationBlock and a number of SystemInformationBlocks. UE needs to locate and read the system information before establishing any connection to the E-UTRA. SystemInformationBlockType1 and all SI messages are transmitted on DL-SCH. UE shall apply the system information acquisition procedure: upon selecting and upon reselecting, after handover completion, after entering E-EUTRA from other RAT, upon return (more ..)