[Κινητές και Δορυφορικές] Γενικές απορίες κι ανακοινώσεις/επικαιρότητα 2013/2014

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Πρόγραμμα Μαθημάτων Χειμερινού Εξαμήνου 2026-2027

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The U.S. Mid-Atlantic Coast at night from the International Space Station.

Image credit: NASA

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GSA: 1800 MHz Prime Band for LTE Deployments Worldwide



There are 120 commercially launched LTE1800 networks in 63 countries, according to a recent GSA (the Global mobile Suppliers Association) report. So far 279 LTE networks have been commercially launched in 101 countries. 43% of LTE operators have used 1800 MHz (band 3) spectrum in their networks either as a single band system, or as part of a multi-band deployment.

According to GSA, further 1800 MHz is the prime band for LTE deployments worldwide, and will greatly assist international roaming for mobile broadband. Many more LTE1800 network deployments are in the pipeline.

In addition, 1800 MHz now also has the largest user devices ecosystem. 37% of all LTE user devices support LTE1800 band. More than 50% of newly launched user terminals support 1800 MHz spectrum. A total of 589 LTE1800 user devices have been announced, a annual growth of 152%.

Πηγή: http://lteworld.org/blog/gsa-1800-mhz-prime-band-lte-deployments-worldwide

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Huawei Completes 300 Mbps LTE-A Category 6 Test

Huawei has announced the successful completion of a LTE-Advanced (LTE-A) Category 6 connectivity test with download speeds reaching up to 300 Mbps. This test was jointly completed with Qualcomm Technologies.

The test utilized SingleRAN equipment available from Huawei and Qualcomm Technologies’ fourth-generation multimode LTE modem – the Qualcomm® Gobi™ 9x35. Qualcomm's Gobi™ is commercially available cellular modem and manufactured on 20 nm process.

A peak download speed of up to 300 Mbps was made possible, with added support for up to 40MHz wideband carrier aggregation.

Source: http://lteworld.org/news/huawei-completes-300-mbps-lte-category-6-test

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AT&T Plans 4G LTE In-Flight Connectivity Service

U.S. carrier AT&T plans to launch a 4G LTE-based in-flight connectivity service for airlines and passengers in commercial, business and general aviation. The service, planned to be available as soon as late 2015, will be capable of providing in-flight broadband for customers including fast, reliable Wi-Fi and onboard entertainment.

To deliver this new service, AT&T plans to build an air-to-ground network in the continental United States, based on LTE standards, to provide fast speeds and efficient utilization of spectrum already owned by AT&T.

AT&T plans to work with Honeywell to provide hardware and service capabilities to deliver the in-flight connectivity solution. According to AT&T, its in-flight connectivity also offers the potential for improved communications between the plane and the ground through transmission of real-time aircraft data for optimizing, monitoring and evolving airlines’ operations.

Source: http://lteworld.org/news/att-plans-4g-lte-flight-connectivity-service

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Vehicle communications for safety: eCall fundamentals and test solutions

This webinar provides insights into the underlying key technologies of the eCall system, highlights the test requirements and demonstrates powerful test solutions for the verification of eCall modems to ensure standard-compliant operation.

<a href="https://www.youtube.com/watch?v=qYdG3VLeWYI" target="_blank">http://www.youtube.com/watch?v=qYdG3VLeWYI</a>

https://www.youtube.com/watch?v=qYdG3VLeWYI#t=22

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Telecom NZ to Trial LTE in 700 MHz Band

Telecom New Zealand plans to begin trial of LTE network over APT700 MHz spectrum next month. The upcoming trial will be conducted in conjunction with Huawei Technologies over 11 cell sites spread across three Waikato locations including central Hamilton and the Mystery Creek Events Centre.

Telecom will use Huawei wireless routers for testing purposes, meaning access to the trial network will be limited to those involved in the trial. Testing will begin in late May and run for approximately four weeks. The non-commercial trial will involve select customers.

While New Zealand Government’s 700 MHz spectrum auction has not yet concluded, the Ministry of Business, Innovation and Employment (MBIE) has approved temporary use of the spectrum for trial purposes.

Telecom has already committed to buy 700 MHz spectrum in the Government’s auction and plans to deploy this spectrum once the auction process has concluded.

According to the operator, the 700MHz spectrum will be important in bringing affordable 4G mobile data services to most of New Zealand, as it delivers greater reach and enhanced in-building coverage over other higher band frequencies. This makes it more efficient to build and ideally suited for delivering 4G services in regional areas.

Source: http://lteworld.org/news/telecom-nz-trial-lte-700-mhz-band

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LTE Capacity Webinar

AIRCOM International webinar, focusing on LTEi Capacity and capability

<a href="https://www.youtube.com/watch?v=07wrrzlD7AE" target="_blank">http://www.youtube.com/watch?v=07wrrzlD7AE</a>

https://www.youtube.com/watch?v=07wrrzlD7AE

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IEEE Communication Magazine

http://telekomt.files.wordpress.com/2013/03/comg_20120601_jun_2012.pdf

Ρίξτε μια ματιά στο LTE-A και από εδώ 

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LTE- Advanced (3GPP Rel.11)
Technology Introduction

http://cdn.rohde-schwarz.com/dl_downloads/dl_application/application_notes/1ma232/1MA232_1E_LTE_Rel11.pdf

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Carrier aggregation –
(one) key enabler for LTE-Advanced

http://cdn.rohde-schwarz.com/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/Article_Carrier-aggregation.pdf

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Antenna Evolution: Meeting the demand for LTE Small Cell & DAS networks

Implementations of Small Cell and DAS systems have many challenges; not the least of which is the selection and placement of the antenna elements. Since these systems deploy antennas close to the users, additional municipal and building owner restrictions may be enforced. The physical space provided for antenna installation is often limited and concealed when possible. Further, the input power is considerably less than for macro networks making PIM less of a concern than for outdoor networks. These factors make designing Small Cell and DAS systems significantly different from designing macro networks. In this webinar, these differences will be presented in addition to best known design practices.

http://lteworld.org/video/antenna-evolution-meeting-demand-lte-small-cell-das-networks

[ampoulog]

Vehicle communications for safety: eCall fundamentals and test solutions

This webinar provides insights into the underlying key technologies of the eCall system, highlights the test requirements and demonstrates powerful test solutions for the verification of eCall modems to ensure standard-compliant operation.

<a href="https://www.youtube.com/watch?v=qYdG3VLeWYI" target="_blank">http://www.youtube.com/watch?v=qYdG3VLeWYI</a>

https://www.youtube.com/watch?v=qYdG3VLeWYI

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Rohde & Schwarz webinar: Wi-Fi traffic offload in LTE

<a href="https://www.youtube.com/watch?v=hySj-naUUZE" target="_blank">http://www.youtube.com/watch?v=hySj-naUUZE</a>

https://www.youtube.com/watch?v=hySj-naUUZE

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LTE Direct Overview

Description:

LTE Direct is a new and innovative direct device-to-device technology for operator enabled proximity services. LTE Direct offers a high capacity, privacy sensitive and battery efficient way to autonomously discover 1000s of devices/services in the proximity. LTE Direct is a candidate feature for 3GPPR12.

http://www.qualcomm.com/media/documents/lte-direct-overview-0

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Live Webcast: Three Astronauts Head to ISS
Read more at http://www.iflscience.com/space/live-webcast-three-astronauts-head-iss#eJfVzXQXGVMbax9y.99