Best Free Resources To Learn 3GPP LTE
Either you are a 3G, LTE or LTE Advanced developer or a tester you will definitely love to have these free study materials and Webcast CDs from Agilent. If you do not know about Agilent, it is one of the biggest wireless test equipments manufacturer in the world. Agilent is specialized in range of products staring from Oscilloscopes, Protocol Analyzers, Network Analyzers, Bit Error Ratio Test Solutions, EMI/EMC, Phase Noise, Physical Layer Test Systems and many other important test and debugging products.
Categories: Freebies, LTE Tags: 3GPP Video CDs, Free LTE Training Materials, LTE Advanced Posters, LTE Free Resources, LTE Free Traing CDs, LTE Posters
LTE (E-UTRA) UM RLC PDU Encoding With Examples
LTE Unacknowledged Mode (UM) RLC PDU overview is discussed in another tutorial. If you want to learn the basics of UM data PDUs you can check the following tutorial. LTE RLC PDU Structure & Encoding In this tutorial examples for most important encoding techniques used for UM RLC PDUs are discussed. UMD PDU with 5 bit SN (No LI) Assumptions Sequence Number (SN) Length: 5 bits Sequence Number: 1 Service Data Unit (SDU): 01 02 03 04 05 Framing Info: 00 00: First byte of the data field corresponds to first byte of a RLC SDU & last byte of the Data field corresponds to last byte of a RLC SDU. No Length Indicator is used. UMD PDU with 10 bit SN (No LI) Assumptions Sequence Number (SN) Length: 10 bits Sequence Number: 1 Service Data Unit (SDU): 01 02 03 04 05 Framing Info: 00 00: First byte of [...]
Categories: LTE-RLC Tags: EUTRAN, Length Indicator, LTE RLC, PDU Encoding, Radio Link Protocol, UM RLC PDU Encoding
LTE Security Architecture
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 security header. AS security Carried out for RRC and user plane data and belongs to the scope of UE and eNB. PDCP layer in UE and eNB side is responsible for the ciphering and integrity protection. RRC messages are integrity protected and ciphered but U-Plane data is only ciphered. Different Security algorithms (integrity/ciphering) Integrity “0000″ EIA0 Null Integrity Protection algorithm “0001″ 128-EIA1 SNOW 3G “0010″ 128-EIA2 AES Ciphering “0000″ EEA0 Null ciphering algorithm “0001″ 128-EEA1 SNOW 3G based algorithm “0010″ 128-EEA2 AES based algorithm Pre Shared Keys UE Security [...]
Categories: LTE Security Tags:
LTE UE Initial Access
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 and Physical channels in downlink for cell search and selection. Signals in downlink Primary and secondary Synchronization signal Cell Specific Down Link reference signal LTE Downlink Physical Channels Physical Broadcast Channel(PBCH): Provides essential system information(System Bandwidth) LTE follows a hierarchical cell search, which means from primary and secondary synchronization signal it extracts the cell id and cell group id respectively. Then it combines both in a hierarchical manor to generate physical cell identity. For details about Physical hierarchy please follow the Note below Note: Physical Cell id can be any [...]
Categories: LTE Tags:
Rohde & Schwarz LTE Basics Webinar (FDD and TDD)
This is the Rohde & Schwarz LTE (E-UTRA) webinar. In this webinar basics of LTE technology are explained.
LTE Resources: Free System Posters
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 into. So these are some of the most useful resources to start learning about LTE. All these posters are free, so you do not have to pay anything. Free PDF Posters LTE Poster from Alcatel Lucent Alcatel Lucent are one of the top network solution provider. The LTE poster from Alcatel Lucent provides some details about bearer architecture, LTE security system, inter-networking of LTE with other 3GPP (UMTS and GSM) and non-3GPP systems. It also provides some basic information about different important nodes in the LTE systems like UE, eNodeB, [...]
LTE Radio Resource Control (RRC) System Information
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 from out of coverage, upon receiving a notification that the system information is changed, upon receiving an indication about the presence of an ETWS notification, upon receiving a request from CDMA2000 upper layer and upon receiving maximum validity duration. System Information Required by UE The System Information required by an UE depends on the RRC state of the UE. RRC Idle In RRC Idle state the following system information are required: MasterInformationBlock SystemInformationBlockType1 SystemInformationBlockType2 through SystemInformationBlocakType8 depending on the type of RATs supported by UE RRC Connected In RRC Connected [...]
