Overview of the Samsung Push to Talk (PTT) Solution on AWS
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Unlicensed Lte Interference to Wi-Fi When Operating Co-Channel
UNLICENSED LTE INTERFERENCE TO WI-FI WHEN OPERATING CO-CHANNEL Christopher Szymanski 1 | © 2016 Broadcom Limited. All rights reserved. WI-FI DEMAND EVER-INCREASING Wi-Fi Cumulative Product Shipments and Installed Base of Products 2000-2020 35,000.0 Installed Base 30,000.0 Cumulative Shipments Approaching 15 billion cumulative shipments and 7.5 billion Wi-Fi install base 25,000.0 20,000.0 15,000.0 10,000.0 5,000.0 - 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Source: ABI Research: Cumulative Wi-Fi-enabled Product Shipments and Installed Base of Wi-Fi-enabled Products World Market, Forecast: 2000 to 2020. 2 | © 2016 Broadcom Limited. All rights reserved. WI-FI IS PREDOMINATE WAY FOR PEOPLE TO ACCESS INTERNET; IN SOME INSTANCES THE ONLY WAY • Cisco: Mobile data traffic increased 74% in 2015, reaching 3.7 exabytes per month [1] • Over 80% of mobile data traffic goes over Wi-Fi – Strategy Analytics’ Telemetry Intelligence Platform: From 2H13 to 1H15 Wi-Fi traffic grew at over 2X the rate of cellular traffic, accounting for ~83% of wireless traffic [2] – Analysys Mason: 81% of smart phone traffic is carried over Wi-Fi [3] – Mobidia: “Wi-Fi dominating monthly data usage” [4] – iOS users consume 82% of wireless data over Wi-Fi – Android users consume 78% of wireless data over Wi-Fi • Pew Internet Research: In-home Broadband access decreasing, increasing number of “smartphone-only” adults (13% of Americans are smartphone-only, and shift most pronounced among lower income households) [5] -
Base Station Antenna Selection for LTE Networks
White paper Base station antenna selection for LTE networks Ivy Y. Kelly, Ph.D. technology development strategist, Sprint Martin Zimmerman, Ph.D. Base Station Antenna engineering director, CommScope Ray Butler, MSEE Wireless Network Engineering vice president, CommScope Yi Zheng, Ph.D. Base Station Antenna senior engineer, CommScope December 2017 Contents Executive summary 3 Antenna overview 3 LTE fundamentals 3 Selecting the optimum antenna for your network 5 Conclusion 6 References 6 About the authors 7 commscope.com 2 Executive summary Rapid mobile data growth is requiring the industry to use more sophisticated, higher-capacity access technologies like LTE, which supports many advanced antenna techniques. LTE requires precise containment of RF signals used to transmit mobile data, which can only be accomplished with high-performance antennas. This paper gives an overview of antennas and their application in practical configurations for various types of LTE antenna techniques. Antenna overview Antenna parameters can be separated into two categories, as shown The first LTE specification is part of 3GPP Release 8, which was below. Primary parameters (Table 1) are those specifically mentioned frozen in December 2008. LTE-Advanced generally refers to the LTE when defining the type of antenna used in a particular application. features that are found in Release 10 and beyond. LTE-Advanced For a given antenna vendor, the primary parameters are enough to features include CA, eight-layer DL transmission, four-layer UL identify a specific model that can be used. Secondary parameters transmission, and enhanced inter-cell interference coordination (Table 2) are those that impact performance and can be used to (eICIC).2 Release 10 features are just now being deployed. -
Federal Communications Commission § 90.665
Federal Communications Commission § 90.665 § 90.656 Responsibilities of base sta- where within their authorized MTA, tion licensees of Specialized Mobile provided that: Radio systems. (1) The MTA licensee affords protec- (a) The licensees of base stations that tion, in accordance with § 90.621(b), to provide Specialized Mobile Radio serv- all sites for which applications were ice on a commercial basis of the use of filed on or prior to August 9, 1994. individuals, Federal government agen- (2) The MTA licensee complies with cies, or persons eligible for licensing any rules and international agreements under either subparts B or C of this that restrict use of frequencies identi- part will be responsible for exercising fied in their spectrum block, including effective operational control over all the provisions of § 90.619 relating to mobile and control stations that com- U.S./Canadian and U.S./Mexican border municate with the base station. The areas. base station licensee will be respon- (3) The MTA licensee limits its field sible for assuring that its system is op- strength at any location on the border erated in compliance with all applica- of the MTA service area in accordance ble rules and regulations. with § 90.671 and masks its emissions in accordance with § 90.669. (b) Customers that operate mobile (b) In the event that the authoriza- units on a particular Specialized Mo- tion for a previously authorized co- bile Radio system will be licensed to channel station within the MTA licens- that system. A customer that operates ee’s authorized spectrum block is ter- temporarily on more than one system minated or revoked, the MTA licens- will be deemed, when communicating ee’s co-channel obligations to such sta- with the other system, to be tempo- tion will cease upon deletion of the fa- rarily licensed to the other system and cility from the Commission’s licensing for that temporary period, the licensee record. -
SCS PACTOR 4 (Pdf)
1. Introduction 1 Introduction 1.1 SCS P4dragon, the next Generation Thank you for purchasing the SCS P4dragon DR7800 high performance HF radio modem. SCS modems are the original PACTOR mode modems developed by the people who have created all PACTOR modes. From SCS and SCS representatives, you will receive the best possible support and benefit from the concentrated knowledge of the PACTOR engineers who invented PACTOR. With the introduction of the P4dragon DR7800 modem, SCS also announces PACTOR-4 as a new mode of high performance data transmission over HF frequencies. P4dragon stands for high sophisticated algorithms of communication engineering and high computation power of the PACTOR modems of the fourth generation. 1.2 Packaging list This is a complete list of hardware and software supplied with the SCS P4dragon: • 1 x P4dragon DR7800 High Performance HF-Radio Modem • 1 x Installation Guide • 1 x SCS CD-ROM • 1 x 8 pole DIN cable • 1 x 13 pole DIN cable • 1 x USB cable • 1 x RJ45 Patch cable (with installed “network option”) 1.3 Requirements to operate a PACTOR Modem A transceiver capable of switching between transmit and receive within 20 ms. Most modern transceivers fulfill this requirement. A computer that provides an USB interface or Bluetooth capability. An appropriate terminal program to operate with a USB or Bluetooth virtual COM port. 1.4 About this installation guide This installation manual contains only relevant information about the installation of your SCS P4dragon modem and popular applications like HF email. You can find complete documentation and detailed descriptions of the command set of the P4dragon in the electronic version of the complete manual (PDF format) on the SCS CD-ROM supplied with your modem. -
Global Maritime Distress and Safety System (GMDSS) Handbook 2018 I CONTENTS
FOREWORD This handbook has been produced by the Australian Maritime Safety Authority (AMSA), and is intended for use on ships that are: • compulsorily equipped with GMDSS radiocommunication installations in accordance with the requirements of the International Convention for the Safety of Life at Sea Convention 1974 (SOLAS) and Commonwealth or State government marine legislation • voluntarily equipped with GMDSS radiocommunication installations. It is the recommended textbook for candidates wishing to qualify for the Australian GMDSS General Operator’s Certificate of Proficiency. This handbook replaces the tenth edition of the GMDSS Handbook published in September 2013, and has been amended to reflect: • changes to regulations adopted by the International Telecommunication Union (ITU) World Radiocommunications Conference (2015) • changes to Inmarsat services • an updated AMSA distress beacon registration form • changes to various ITU Recommendations • changes to the publications published by the ITU • developments in Man Overboard (MOB) devices • clarification of GMDSS radio log procedures • general editorial updating and improvements. Procedures outlined in the handbook are based on the ITU Radio Regulations, on radio procedures used by Australian Maritime Communications Stations and Satellite Earth Stations in the Inmarsat network. Careful observance of the procedures covered by this handbook is essential for the efficient exchange of communications in the marine radiocommunication service, particularly where safety of life at sea is concerned. Special attention should be given to those sections dealing with distress, urgency, and safety. Operators of radiocommunications equipment on vessels not equipped with GMDSS installations should refer to the Marine Radio Operators Handbook published by the Australian Maritime College, Launceston, Tasmania, Australia. No provision of this handbook or the ITU Radio Regulations prevents the use, by a ship in distress, of any means at its disposal to attract attention, make known its position and obtain help. -
A Survey of Resource Allocation Techniques for Cellular Network's
electronics Review A Survey of Resource Allocation Techniques for Cellular Network’s Operation in the Unlicensed Band Mohammedhusen Manekiya 1 , Abhinav Kumar 2 , Ashish Yadav 3 and Massimo Donelli 1,* 1 Department of Information Engineering and Computer Science, University of Trento, 38123 Trento, Italy; [email protected] 2 Department of Electrical Engineering, Indian Institute of Technology Hyderabad, Telangana 502285, India; [email protected] 3 Department of Electrical and Computer Engineering, Tandon School of Engineering, New York University, Brooklyn, NY 11201, USA; [email protected] * Correspondence: [email protected]; Tel.: +39-3297-00-4115 Received: 1 August 2020; Accepted: 27 August 2020; Published: 7 September 2020 Abstract: With an ever increasing demand for data, better and efficient spectrum operation has become crucial in cellular networks. In this paper, we present a detailed survey of various resource allocation schemes that have been considered for the cellular network’s operation in the unlicensed spectrum. The key channel access mechanisms for cellular network’s operation in the unlicensed bands are discussed. The various channel selection techniques are explored and their operation explained. The prime issue of fairness between cellular and Wi-Fi networks is discussed, along with suitable resource allocation techniques that help in achieving this fairness. We analyze the coverage, capacity, and impact of coordination in LTE-U systems. Furthermore, we study and discuss the impact and discussed the impact of various traffic type, environments, latency, handover, and scenarios on LTE-U’s performance. The new upcoming 5G New Radio and MulteFire is briefly described along with some of the critical aspects of LTE-U which require further research. -
HD Voice Annex C Minimum Requirements with GSM/UMTS/LTE
GSM Association Non-Confidential Minimum Technical Requirements for use of the HD Voice Logo with GSM/UMTS/LTE issued by GSMA Minimum Technical Requirements for use of the HD Voice Logo with GSM/UMTS/LTE issued by GSMA Version 1.1 22nd March 2013 Security Classification – NON CONFIDENTIAL GSMA MATERIAL Copyright Notice Copyright © 2013 GSM Association. Antitrust Notice The information contain herein is in full compliance with the GSM Association’s antitrust compliance policy. Version 1.1 Page 1 of 18 GSM Association Non-Confidential Minimum Technical Requirements for use of the HD Voice Logo with GSM/UMTS/LTE issued by GSMA Table of Contents INTRODUCTION ..................................................................................................................... 3 ANNEX C: MINIMUM REQUIREMENTS FOR MOBILE NETWORKS AND TERMINALS FOR THE USAGE OF THE ‘HD VOICE’ LOGO WITH GSM/UMTS/LTE............................................................................................................... 3 DOCUMENT MANAGEMENT ............................................................................................... 18 Document History .................................................................................................................. 18 Other Information ................................................................................................................... 18 Version 1.1 Page 2 of 18 GSM Association Non-Confidential Minimum Technical Requirements for use of the HD Voice Logo with GSM/UMTS/LTE issued by GSMA INTRODUCTION -
AT&T 3G Sunset
Product Change Notification AT&T 3G Sunset - Impacts on 4G Devices LTE Category 1, Category 3 and Select Category 4 Models Date: March 9, 2021 I. Product Change Notification Number (PCN) PCN 03092021-02 II. Overview The purpose of this PCN is to avoid service interruption for certain MultiTech 4G products impacted by the impending AT&T 3G network sunset. 4G/LTE Category 1, 3 and 4 devices in the U.S. may no longer attach to the AT&T network after their 3G network sunset, scheduled for late February 2022. Voice-capable cellular modules integrated into several MultiTech products are configured for voice-centric signaling by default. These devices are likely to arrive at a No Service condition after 3G sunset -- even for data-only applications. This is a result of the module requiring a voice signal to connect to networks configured to leverage a combined attach (3G and LTE) for LTE device registration. The MultiTech products detailed in this PCN will be impacted by the 3G sunset. A software configuration change in the cellular module in these products is required in order to avoid a No Service condition. The only exception is for products with cellular modules supporting the IMS service Voice over LTE (VoLTE) and an accompanying VoLTE subscription from your service provider. MultiTech will immediately implement a software configuration change in our manufacturing process to include the required AT command to set a new permanent module default for its User Equipment (“UE”) settings. Note: future module firmware updates may impact this setting. Current default: CEMODE=1 (Voice centric) New default: CEMODE=2 (Data centric) For devices already deployed in the field, you must implement the above mentioned software- configuration change in each device to ensure continued service following the 3G sunset. -
GENERAL AVIATION ANTENNAS Clearly Better Performance—At Any Altitude
GENERAL AVIATION ANTENNAS Clearly better performance—at any altitude. RAMI antennas are known for their streamlined aesthetics, great value, and for what really matters when you're navigating at 24,000 feet: reliable performance. By maintaining our focus on antennas and keeping all of our design and manufacturing in house, the improvements will just keep on coming. COM VOR/LOC/GS Transponder/DME Transponder Marker Beacon GPS Antenna Diplexers/Splitter Base Station ELT Ground Vehicular Cable Assemblies COM AV‐10 Frequency: 118–137 MHz The AV‐10 is designed for high‐performance aircraft applications. It exhibits excellent electrical characteristics and incorporates an efficient aerodynamic 4‐bolt mounting base. The antenna essentially matches the styling of the communication antennas currently used on most singles and light twins. The antenna is designed to operate at speeds up to 350 mph and altitudes up to 50,000 ft. It has a drag force of 2.70 lb @ 250 mph. This antenna is a direct replacement for the CI 121. Antenna AV‐17 Frequency: 118–137 MHz The AV‐17 is designed specifically for mounting to the underside of an aircraft, providing an excellent radiation pattern for air‐to‐ground communications. It has a 4‐bolt mounting base and is low in profile. The antenna is designed to operate at speeds up to 350 mph and altitudes up to 50,000 ft. It has a drag force of 0.66 lb @ 250 mph. This antenna is a direct replacement for the CI 122. AV‐529 Frequency: 118–137 MHz The AV‐529 is designed for broadband communications (118‐137 MHz). -
LTE-Advanced
Table of Contents INTRODUCTION........................................................................................................ 5 EXPLODING DEMAND ............................................................................................... 8 Smartphones and Tablets ......................................................................................... 8 Application Innovation .............................................................................................. 9 Internet of Things .................................................................................................. 10 Video Streaming .................................................................................................... 10 Cloud Computing ................................................................................................... 11 5G Data Drivers ..................................................................................................... 11 Global Mobile Adoption ........................................................................................... 11 THE PATH TO 5G ..................................................................................................... 15 Expanding Use Cases ............................................................................................. 15 1G to 5G Evolution ................................................................................................. 17 5G Concepts and Architectures ................................................................................ 20 Information-Centric -
ETSI TS 123 101 V8.0.0 (2009-01) Technical Specification
ETSI TS 123 101 V8.0.0 (2009-01) Technical Specification Universal Mobile Telecommunications System (UMTS); LTE; General UMTS Architecture (3GPP TS 23.101 version 8.0.0 Release 8) 3GPP TS 23.101 version 8.0.0 Release 8 1 ETSI TS 123 101 V8.0.0 (2009-01) Reference RTS/TSGS-0223101v800 Keywords LTE, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. -
TRB Straight to Recording for All Airport Advisories at Non-Towered
TRANSPORTATION RESEARCH BOARD TRB Straight to Recording for All Airport Advisories at Non-Towered Airports ACRP is an Industry-Driven Program ✈ Managed by TRB and sponsored by the Federal Aviation Administration (FAA). ✈ Seeks out the latest issues facing the airport industry. ✈ Conducts research to find solutions. ✈ Publishes and disseminates research results through free publications and webinars. Opportunities to Get Involved! ✈ ACRP’s Champion program is designed to help early- to mid- career, young professionals grow and excel within the airport industry. ✈ Airport industry executives sponsor promising young professionals within their organizations to become ACRP Champions. ✈ Visit ACRP’s website to learn more. Additional ACRP Publications Available Report 32: Guidebook for Addressing Aircraft/Wildlife Hazards at General Aviation Airports Report 113: Guidebook on General Aviation Facility Planning Report 138: Preventive Maintenance at General Aviation Airports Legal Research Digest 23: A Guide for Compliance with Grant Agreement Obligations to Provide Reasonable Access to an AIP-Funded Public Use General Aviation Airport Synthesis 3: General Aviation Safety and Security Practices Today’s Speakers Dr. Daniel Prather, A.A.E., CAM DPrather Aviation Solutions, LLC Presenting Synthesis 75 Airport Advisories at Non-Towered Airports ACRP Synthesis 75: Airport Advisories at Non- Towered Airports C. Daniel Prather, Ph.D., A.A.E., CAM DPrather Aviation Solutions, LLC California Baptist University C. Daniel Prather, Ph.D., A.A.E., CAM Principal Investigator • Founder, DPrather Aviation Solutions, LLC • Current Founding Chair and Professor of Aviation Science, California Baptist University • Former Assistant Director of Operations, Tampa International Airport • Instrument-rated Private pilot ACRP Synthesis 75 Topic Panel Kerry L.