Saturday, September 17, 2011

Advanced LTE/SAE Certification for Professionals

4G LTE technology is being deployed worldwide with LTE taking lead now over rival 4G standards. Many commercial LTE networks are already in-service worldwide and more are planned to go live soon. 3GPP LTE (Long Term Evolution) Project was launched to improve the UMTS mobile phone standard to cope with future technology evolutions. Goals include improving spectral efficiency, lowering costs, improving services, making use of new spectrum and reframed spectrum opportunities, and better integration with other open standards.

Course Name: Advanced LTE/SAE Certification for Professionals

Course Description

Advanced Course in LTE/SAE Technology offers unique course structure which provides in-depth understanding of evolution path of 3GPP LTE technology. This course provides a detailed explanation of the LTE/SAE based on 3GPP R8 specifications including evolved packet system architecture, protocols, nodes & signaling

Course Objectives

Upon completion of this course, the participants are expected to have a good understanding of LTE/SAE technology as detailed below.

- LTE Fundamentals

- LTE Air Interface

- E-UTRAN Nodes, Protocols & Interfaces

- EPC Nodes, Protocols & Interfaces

- LTE Security & QoS

- LTE Signaling Procedures & Scenarios

- Voice Options for LTE

- R9/R10 LTE Evolutions

Course Prerequisite

Although this certification course requires no previous knowledge or understanding of LTE telephony, a basic understanding of GSM, UMTS technologies would be beneficial.

Delivery Media

- Instructor Led Classroom or On-line Training Sessions (5 Days)

- Student Quizzes

For detailed content refer course content document.

Saturday, April 30, 2011

NgnGuru Offering LTE-Advanced Training

3GPP Release 9 expands the functionality of Release 8 as well as laying solid foundations for LTE-Advanced. 3GPP proposed LTE Release 10 & beyond (LTE-Advanced) as a candidate for IMT-Advanced which has been accepted by ITU. The new capabilities of LTE-Advanced is envisaged to handle a wide range of supported data rates with target peak data rates of up to approximately 100 Mbit/s for high mobility and up to approximately 1 Gbit/s for low mobility. In comparison to LTE, LTE-Advanced is wider than approximately 70 MHz in DL and 40 MHz in UL.

NgnGuru Solutions, a expert in telecom training domain is offering LTE-Advanced Training Course. 1 Day course includes LTE-Advanced overview, requirements, LTE evolutions and Release 10 LTE-Advnced features. Onsite LTE-Advanced course is available in both India and USA market.

Course content details are available in NgnGuru Training Catalog. For more information please send us a message or send an email to support@ngnguru.com.

Sunday, February 6, 2011

LTE Presentations

Wednesday, December 22, 2010

LTE, WiMAX & Femtocell White Papers - Update I

Saturday, October 2, 2010

LTE tutorial - Looking forward beyond HSPA+

Tutorial Outline

  • Beyond HSPA+
  • LTE: motivation and expectations
  • E-UTRAN overview & initial performance evaluation
  • OFDMA and SC-FDMA fundamentals
  • LTE physical layer
  • LTE transmission procedures

Ltetutorial 100126072043 Phpapp01 (1)

Sunday, September 19, 2010

LTE, WiMAX & Femtocell White Papers


Visit LteWorld for more white papers.

Saturday, September 4, 2010

Timing Advance (TA) in LTE

In GSM system MS sends its data three time slots after it received the data from the BTS. This is ok as long as MS-BTS distance is small but increasing distance requires consideration of propagation delay as well. To handle it Timing advance (TA) is conveyed by network to MS and current value is sent to the MS within the layer 1 header of each SACCH. BTS calculates the first TA when it receives RACH and reports it to the BSC and BSC/BTS passes it to UE during Immediate Assignment.

In UMTS Timing Advance parameter was not used but in LTE Timing Advance is back.

In LTE, when UE wish to establish RRC connection with eNB, it transmits a Random Access Preamble, eNB estimates the transmission timing of the terminal based on this. Now eNB transmits a Random Access Response which consists of timing advance command, based on that UE adjusts the terminal transmit timing.

The timing advance is initiated from E-UTRAN with MAC message that implies and adjustment of the timing advance.

3GPP TA Requirements

  • Timing Advance adjustment delay

UE shall adjust the timing of its uplink transmission timing at sub-frame n+6 for a timing advancement command received in sub-frame n.

  • Timing Advance adjustment accuracy

The UE shall adjust the timing of its transmissions with a relative accuracy better than or equal to ±4* TS seconds to the signalled timing advance value compared to the timing of preceding uplink transmission. The timing advance command is expressed in multiples of 16* TS and is relative to the current uplink timing.

Maintenance of Uplink Time Alignment

The UE has a configurable timer timeAlignmentTimer which is used to control how long the UE is considered uplink time aligned

  • when a Timing Advance Command MAC control element is received then UE applies the Timing Advance Command and start or restart timeAlignmentTimer.
  • when a Timing Advance Command is received in a Random Access Response message then one of following action is performed by UE

- if the Random Access Preamble was not selected by UE MAC then UE applies the Timing Advance Command and starts or restarts timeAlignmentTimer.

- else if the timeAlignmentTimer is not running then UE applies the Timing Advance Command starts timeAlignmentTimer; when the contention resolution is considered not successful then UE stops timeAlignmentTimer.

- else ignore the received Timing Advance Command.

  • when timeAlignmentTimer expires UE flushes all HARQ buffers, notifies RRC to release PUCCH/SRS and clears any configured downlink assignments and uplink grants.

Timing Advance Command MAC Control Element

The Timing Advance Command MAC control element is identified by MAC PDU subheader with LCID value = 11101 (Timing Advance Command) .

It has a fixed size and it consists of a single octet as show below.

Timing Advance Command MAC control element has following fields.

  • R: reserved bit, set to "0"
  • Timing Advance Command: This field indicates the index value TA (0, 1, 2… 63) used to control the amount of timing adjustment that UE has to. The length of the field is 6 bits.

Source: 3GPP specifications (36.133 & 36.321)

source: LteWorld