(PAN) Interference and Compatibility Issues for Public Safety Personal Protective Equipment

Total Page:16

File Type:pdf, Size:1020Kb

(PAN) Interference and Compatibility Issues for Public Safety Personal Protective Equipment Research on Personal Area Network (PAN) Interference and Compatibility Issues for Public Safety Personal Protective Equipment Georgetown, South Carolina Fire Department Vigilant Guard Exercise 2015 DHS Research on PAN Networks RF Interference Final Report Document Number: 130200-RPT01 Contract Number: DHS-ST-14-065-FR01 5 August 2015 1 Research Staff Scott Ross, Senior Program Manager Robbie Guest, Senior Electrical Engineer Ed Irwin, Principal Biomedical Engineer Dan Murray, Technical Advisor Peter Bryant, Division Manager, Avionics Systems Behnam Kamali, Ph.D., P.E., Mercer University Professor, Department of Electrical & Computer Engineering Kristin Streilein, Biomedical Engineer Tracy Tillman, Senior Systems Engineer Patrick Hobbs, Technical Communications and Media Technician Deidra Boswell, Biomedical Engineer Tim Maloney, VP for Operations, Guardian Centers Vann Burkart, Program Manager, Guardian Centers Moin Rahman, Principal Scientist, High Velocity Human Factors (HVHF) Sciences DHS S&T Project Lead William Stout, Program Manager, U.S. Department of Homeland Security Science and Technology Directorate First Responders Group i ACKNOWLEDGEMENTS Mercer Engineering Research Center (MERC), a non-profit operating unit of Mercer University, performed this analysis for the Department of Homeland Security (DHS) First Responders Group (FRG) Science and Technology Directorate. MERC was supported in this research by Guardian Centers of Perry, Georgia, Mercer University School of Engineering, and High Velocity Human Factor (HVHF) Sciences. The MERC team extends its deep appreciation to the members of the first responder communities for their cooperation, information, and feedback; their contributions are the foundation of this report. We would like to especially thank the Georgetown South Carolina Fire Department (GTFD) and Emergency Management Agency (EMA) for allowing us to participate in Vigilant Guard 2015. We would also like to thank the Hartsfield-Jackson Atlanta International Airport Public Safety personnel for allowing us to participate in their major airport training event. Further, we would like to thank the Georgia National Guard and all of the Middle Georgia county and city first responders who supported us during training events at Guardian Centers. Finally, the MERC team offers its gratitude to all public safety personnel, whose dedication and commitment ensure the safety of our families, our communities and our nation. This report is a tribute to their service. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS ............................................................................................................ ii EXECUTIVE SUMMARY ........................................................................................................... xi INTRODUCTION .......................................................................................................................... 1 BACKGROUND ............................................................................................................................ 3 Communication Technology Issues .......................................................................................... 6 Types of Interference ................................................................................................................ 7 Description of Public Safety Spectral Allocation ................................................................... 10 VHF Low Band (25-50 MHz)........................................................................................... 10 VHF High Band (138-144 MHz / 148-174 MHz) ............................................................ 10 UHF Band (450-460 MHz) ............................................................................................... 11 UHF T-Band (470-512 MHz) ........................................................................................... 11 700 MHz Band .................................................................................................................. 12 Nationwide Broadband Network for Public Safety and the “FirstNet” ............................ 13 Narrow Band Channels for Public Safety Community ..................................................... 14 800MHz Band ................................................................................................................... 14 4.9 GHz C-Band Public Safety Spectrum ......................................................................... 16 ISM Bands ........................................................................................................................ 16 APCO-25........................................................................................................................... 18 Satellite Networks ............................................................................................................. 19 Advancing Towards LTE-Based Technologies: FirstNet ................................................. 20 Human Factors Issues ............................................................................................................. 21 Usability and Training Issues............................................................................................ 21 Sociotechnical Issues ........................................................................................................ 25 METHODOLOGY ....................................................................................................................... 30 Planned Exercise versus Real-world Scenarios ...................................................................... 30 Measuring Information Transmission and Loss in Human Communications ........................ 31 Research Questions and Definition of Variables .................................................................... 33 Experimental Design ............................................................................................................... 36 Radio Frequency Instrumentation Design ........................................................................ 36 iii System Component Descriptions ...................................................................................... 38 Testing Protocols .................................................................................................................... 51 RF Testing Protocol .......................................................................................................... 51 Human Factors Testing Protocol ...................................................................................... 57 Site Selection, Exercise Details and Site-specific Instrumentation Setup ........................ 59 RESEARCH RESULTS ............................................................................................................... 61 RF Analytical Framework....................................................................................................... 61 Wireless Device Typology ................................................................................................ 66 HF Analytical Framework ...................................................................................................... 66 The National Incident Management System Incident Complexity Scale ......................... 71 Expertise Categorization ................................................................................................... 71 Georgia National Guard Search and Extraction Exercise (GC-14) ........................................ 72 GC-14 RF Analysis ................................................................................................................. 77 GC-14 HF Analysis........................................................................................................... 83 Vigilant Guard 2015 (VG-15) ................................................................................................. 86 Scenario 1: South Carolina Helicopter Aquatic Rescue Team Operation ....................... 87 Scenario 2: Georgetown Fire Department Tornado Response ........................................ 89 Tornado Response Scenario Analysis ............................................................................... 90 Scenario 3: Georgetown Airport C2 and Medevac Operations ....................................... 97 Georgetown Airport Analysis ........................................................................................... 99 Hartsfield-Jackson Atlanta International Airport Mock Disaster Exercise .......................... 100 Airport Mock Disaster RF Analysis ............................................................................... 103 Guardian Centers Subway Explosion Response Exercise (GC-15) ...................................... 104 GC-15 Analysis ............................................................................................................... 105 Research Question Results .............................................................................................. 111 DISCUSSION ............................................................................................................................. 119 Technology Issues ................................................................................................................. 119 Human Issues ........................................................................................................................ 121 Implications for Future Technologies ..................................................................................
Recommended publications
  • Complete Document 042612
    Investigation into US Radio Spectrum Policy and Management An Interactive Qualifying Project Report Submitted to the Faculty of the WORCESTER POLYTECHNIC INSTITUTE In partial fulfillment of the requirements for the Degree of Bachelor of Science By Robert A. Over 4/26 /2012 Project Advisor – Professor David I. Spanagel Project Advisor – Professor Alexander M. Wyglinski This report represents work of WPI undergraduate students submitted to the faculty as evidence of a degree requirement. WPI routinely publishes these reports on its web site without editorial or peer review. For more information about the projects program at WPI, see http://www.wpi.edu/Academics/Projects . Table of Contents 1 Introduction .................................................................................................................................... 7 2 Background ................................................................................................................................... 11 2.1 Radio Spectrum Establishment ............................................................................................... 11 2.1.1 TV Broadcast Frequency Bands ....................................................................................... 12 2.1.2 Mobile Communications Frequency Bands ..................................................................... 15 2.2 Governance and Regulation ................................................................................................... 17 2.2.1 History of US Government Radio Regulation ..................................................................
    [Show full text]
  • Wireless Technologies and the SAFECOM Sor for Public Safety Communications
    Wireless Technologies and the SAFECOM SoR for Public Safety Communications Leonard E. Miller Wireless Communication Technologies Group Advanced Network Technologies Division Information Technology Laboratory National Institute of Standards and Technology Gaithersburg, Maryland 2005 Cover photo: Santa Clara County antenna farm, from http://www.sccfd.org/frequencies.html ii Wireless Technologies and the SAFECOM SoR for Public Safety Communications Preface The Problem: Lack of Capacity, Interoperability, and Functionality National assessments of public safety communications (PSC) that were made in the 1990s found that the nation’s public safety agencies faced several important problems in their use of radio communications1: • First, the radio frequencies allocated for Public Safety use have become highly congested in many, especially urban, areas…. • Second, the ability of officials from different Public Safety agencies to communicate with each other is limited…. Interoperability is hampered by the use of multiple frequency bands, incompatible radio equipment, and a lack of standardization in repeater spacing and transmission formats. • Finally, Public Safety agencies have not been able to implement advanced features to aid in their mission. A wide variety of technologies—both existing and under development —hold substantial promise to reduce danger to Public Safety personnel and to achieve greater efficiencies in the performance of their duties. Broadband data systems, for example, offer greater access to databases and information that can save lives and contribute to keeping criminals “off the street.” Video systems promise better surveillance capabilities, increased use of robotics in toxic and hazardous environments, and better monitoring and tracking of both personnel and equipment. The national assessments of PSC have had significant impact on legislation, regulation, and funding.
    [Show full text]
  • Glossary of Terminology
    Glossary of Broadband Terminology This glossary was compiled by Ray Elseth of Broadband Development 3 (http://www.bbd3.com) and Thomas Asp of Virchow Krause (http://virchowkrause.com), and is a supplement to “Broadband Access: The Local Government Role” by Thomas Asp, Harvey L. Reiter, Jerry Schulz, and Ronald L. Vaden (IQ Report 36, no. 2 [Washington, D.C.: ICMA, 2004]). 802.11 A family of specifications covering wireless connectivity between devices normally located within 100’ to 300’ of each other. Often referred to as Wireless Local Area Network (WLAN). Most common implementation is 802.11b (see Wi- Fi), but 802.11a and 802.11g are also in active use. 802.15 A family of specifications covering wireless connectivity between devices normally located within 10’ to 30’ of each other. Often referred to as Wireless Personal Area Network (WPAN). Implemented as “Bluetooth.” 802.16 A family of specifications covering wireless connectivity between devices normally located within 1 to 30 miles of each other. Often referred to as Wireless Metropolitan Area Network (WMAN). Access Point (AP) A hardware device that acts as a connectivity hub to permit users of a wireless device to connect to a wired local area network. Provides a bridge between Ethernet wired LANs (local area networks) and the wireless network. Access points are the connectivity point between Ethernet wired networks and devices equipped with a wireless LAN adapter card. Antenna The equipment that allows the transmission or reception of radio frequency energy. Asynchronous Digital A technology that allows high-speed data to be sent over a Subscriber Line single pair of existing copper telephone lines, with data rates (ADSL) for receiving data differing from data rates for sending data.
    [Show full text]
  • Improving Public Safety Communications in the 800 Mhz Band; Consolidating the 900 Mhz Industrial/Land Transportation and Business Pool Channels, WT Docket No
    Federal Communications Commission FCC 04-168 Before the Federal Communications Commission Washington, D.C. 20554 In the Matter of ) ) Improving Public Safety Communications in the ) 800 MHz Band ) WT Docket 02-55 ) Consolidating the 800 and 900 MHz ) Industrial/Land Transportation and Business Pool ) Channels ) ) ET Docket No. 00-258 Amendment of Part 2 of the Commission’s Rules ) to Allocate Spectrum Below 3 GHz for Mobile ) and Fixed Services to Support the Introduction of ) New Advanced Wireless Services, including Third ) RM-9498 Generation Wireless Systems ) ) Petition for Rule Making of the Wireless ) Information Networks Forum Concerning the ) RM-10024 Unlicensed Personal Communications Service ) ) Petition for Rule Making of UT Starcom, Inc., ) Concerning the Unlicensed Personal ) ET Docket No. 95-18 Communications Service ) ) Amendment of Section 2.106 of the Commission’s ) Rules to Allocate Spectrum at 2 GHz for use by ) the Mobile Satellite Service REPORT AND ORDER, FIFTH REPORT AND ORDER, FOURTH MEMORANDUM OPINION AND ORDER, AND ORDER Adopted: July 8, 2004 Released: August 6, 2004 By the Commission: Chairman Powell, Commissioners Abernathy, Copps, and Adelstein issuing separate statements. TABLE OF CONTENTS Heading Paragraph # I. INTRODUCTION.................................................................................................................................. 1 II. EXECUTIVE SUMMARY.................................................................................................................... 8 III. MAJOR FINDINGS
    [Show full text]
  • Before the Federal Communications Commission Washington, D.C
    BEFORE THE FEDERAL COMMUNICATIONS COMMISSION WASHINGTON, D.C. 20554 In the Matter of ) ) Request for Declaratory Ruling That the ) WT Docket No. 11-110 Commission’s Rules Authorize Greater ) Than 25 kHz Bandwidth Operations in ) the 800 MHz ESMR Band ) ) To: Chief, Wireless Telecommunications Bureau COMMENTS OF SOUTHERNLINC WIRELESS Southern Communications Services, Inc. d/b/a SouthernLINC Wireless (“SouthernLINC Wireless”) hereby submits its comments in support of the Petition for Declaratory Ruling filed on June 3, 2011, by Sprint Nextel Corporation (“Sprint Nextel”) to allow larger than 25 kHz bandwidth operations in the 800 MHz Enhanced Specialized Mobile Radio Service (“ESMR”) band.1 SouthernLINC Wireless urges the Commission to grant the Petition and declare that licensees in the ESMR band may deploy and operate technologies that require greater than 25 kHz bandwidth on the 800 MHz spectrum authorized by their Economic Area (“EA”) licenses. The requested declaratory ruling would be technology-neutral as it would provide licensees in the ESMR band with the ability to deploy and operate the mobile wireless technology of their choice, including 3G technologies such as CDMA and 4G technologies such as LTE. 1 / “Wireless Telecommunications Bureau Seeks Comment on Petition From Sprint Nextel to Allow Wideband Operations In 800 MHz Enhanced Specialized Mobile Radio Service Bands, WT Docket No. 11-110, Public Notice, DA 11-1152 (rel. June 30, 2011) (“Public Notice”). Significantly, the requested ruling would promote regulatory parity among CMRS providers and encourage the competitive deployment and greater availability of mobile broadband technologies and services for US consumers. SouthernLINC Wireless emphasizes, however, that the requested ruling must expressly apply to all EA-licensed ESMR frequencies, including those in the expanded ESMR band in the southeastern United States – i.e., the 813.5-824/858.5-869 MHz band.
    [Show full text]
  • Facilitating 5G in the 3.45-3.55 Ghz Band Report and Order and Further Notice of Proposed Rulemaking - WT Docket No
    September 9, 2020 FACT SHEET* Facilitating 5G in the 3.45-3.55 GHz Band Report and Order and Further Notice of Proposed Rulemaking - WT Docket No. 19-348 Background: The Commission has acted quickly in recent years to meet the growing demand for mid- band spectrum for 5G. Last month, the FCC concluded an auction of 70 megahertz of Priority Access Licenses in the 3.5 GHz band, and on December 8, the Commission will begin an auction of 280 megahertz of spectrum in the 3.7 GHz band in the adjacent C-band. In the MOBILE NOW Act, Congress directed the Commission to identify spectrum for new mobile and fixed wireless broadband use, and to work with the National Telecommunications and Information Administration to evaluate whether commercial wireless services and federal incumbents could share use of spectrum between 3.1 and 3.55 GHz. In December 2019, the Commission adopted a Notice of Proposed Rulemaking proposing to remove the non-federal allocations from the 3.3-3.55 GHz band and seeking comment on relocating incumbent non-federal operations out of the band, in order to prepare it for possible commercial use. Last month, the White House and the Department of Defense announced plans to allow for commercial 5G systems to operate in the 3.45-3.55 GHz band throughout almost all of the contiguous U.S. What the Order Would Do: • Eliminate the non-federal radiolocation service allocation in the 3.3-3.55 GHz band and the non- federal amateur allocation in the 3.3-3.5 GHz band but allow incumbent licensees to continue operating in the 3.45-3.55 GHz band until a future date; • Relocate non-federal radiolocation licensees to the 2.9-3.0 GHz band, allowing them to continue operating on a secondary basis to federal operations, consistent with current allocations; and • Allow amateur licensees to individually determine appropriate alternate spectrum from existing available spectrum allocations.
    [Show full text]
  • DOC-370264A1.Pdf
    February 24, 2021 FACT SHEET* Facilitating Shared Use in the 3.1-3.55 GHz Band Second Report and Order, Order on Reconsideration, and Order of Proposed Modification, WT Docket No. 19-348 Background The Beat China by Harnessing Important, National Airwaves for 5G Act of 2020, which was included in the Fiscal Year 2021 omnibus spending bill, requires the Commission to work with its Federal partners to bring all of the 3.45 GHz band spectrum to market for next-generation wireless use through a system of competitive bidding by December 31, 2021. Beginning the implementation of this Congressional mandate, this item reallocates 100 megahertz in the 3.45 GHz band for flexible use wireless services and adopt rules to implement the new 3.45 GHz Service, The framework adopted for the 3.45 GHz band will enable full-power commercial use and provide flexibility to future licensees in deploying their networks in this band, while also ensuring that federal incumbents are still protected where and when they require continued access to the band. What the Second Report and Order Would Do: • Make 100 megahertz of spectrum in the 3.45 GHz band available for flexible use wireless services throughout the contiguous United States; • Add a co-primary, non-federal fixed and mobile (except aeronautical mobile) allocation to the band; • Create a regime to coordinate non-federal and federal use of spectrum by adopting Cooperative Planning Areas and Periodic Use Areas and establishing coordination procedures; • Adopt a band plan and technical, licensing, and competitive
    [Show full text]
  • Emerging Technologies and Their Expected Impact on Non-Federal Spectrum Demand
    EMERGING TECHNOLOGIE S AND THEIR EXPECTED IMPACT ON NON-FEDERAL SPECTRUM DEMAND May 2019 EMERGING TECHNOLOGIES AND THEIR EXPECTED IMPACT ON NON-FEDERAL SPECTRUM DEMAND Mr. President: Wireless technology has the power to drive our economy, protect national security, and improve the lives of Americans in ways that are still being discovered. As a result of our Nation’s leadership in 4G, we increased GDP by $100 billion in 2016, created more jobs, lowered consumer costs, and ensured that the United States was the home to the entrepreneurial revolution of advanced wireless applications. 5G networks can move massive amounts of data at exponentially faster speeds than existing 4G LTE networks, and will ensure American job growth, improve national security, and ensure American technological leadership in the 21st century. However, as our nation continues to innovate and create devices that are more capable, the demand for spectrum increases as well. To reap the benefits of 5G and the networks of the future, the Nation must have a forward-looking strategic policy to make spectrum use more efficient and make more spectrum available. In your October 25, 2018 Presidential Memorandum, “Developing a Sustainable Spectrum Strategy for America’s Future,” you directed The White House Office of Science and Technology Policy to develop a report on emerging technologies and their expected impact on non-Federal spectrum demand. The attached report examines the foundation of 5G technologies and the critical importance of leveraging such technologies to expedite rollout of 5G networks, details the spectrum requirements of 5G and Wi- Fi, and reviews recent and ongoing activities across the government to meet the spectrum demand.
    [Show full text]
  • Supplemental Application Form a for Wireless Projects
    WIRELESS TELECOMMUNICATION FACILITIES PLANNING DIVISION SUPPLEMENTAL APPLICATION FORM A FOR WIRELESS PROJECTS The City of Monrovia recognizes that the provision of wireless telecommunications facilities (WF) are highly technical enterprises subject to various federal, state, and local regulations. This supplemental application must be submitted as part of an application for the approval of the installation or modification of a wireless telecommunications facility. This form assists the City to comply with its duties under Chapter 17.46 and other provisions of the Monrovia Municipal Code; the Telecommunications Act of 1996 (including 47 U.S.C. §§ 253, 332); the FCC Shot Clock Order (FCC 09-99 and FCC 14-153); Section 6409(a) of the Spectrum Act and FCC 14- 153; California Public Utilities Code Sections 7901 and 7901.1; the California Environmental Quality Act (“CEQA”); the provisions of California Government Code Sections 65850.6 and 65964; and other local, state, and federal laws, regulations, and court decisions. The City requires that the applicant provide this information to assist it in creating a written administrative record containing substantial evidence sufficient to permit the City’s informed consideration of your request, and to determine the duties, rights and obligations of the City and the applicant/owner of the proposed project. No application that requires submittal of a supplemental application shall be determined complete, or be considered for determination of completeness until all required responses to this supplemental application form are completed. Attachments must be numbered to correspond with the numbers in this application. Initial on line provided to indicate that required documentation is attached.
    [Show full text]
  • Device-To-Device Communications in LTE-Advanced Network Junyi Feng
    Device-to-Device Communications in LTE-Advanced Network Junyi Feng To cite this version: Junyi Feng. Device-to-Device Communications in LTE-Advanced Network. Networking and Internet Architecture [cs.NI]. Télécom Bretagne, Université de Bretagne-Sud, 2013. English. tel-00983507 HAL Id: tel-00983507 https://tel.archives-ouvertes.fr/tel-00983507 Submitted on 25 Apr 2014 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. N° d’ordre : 2013telb0296 Sous le sceau de l’Université européenne de Bretagne Télécom Bretagne En habilitation conjointe avec l’Université de Bretagne-Sud Ecole Doctorale – sicma Device-to-Device Communications in LTE-Advanced Network Thèse de Doctorat Mention : Sciences et Technologies de l’information et de la Communication Présentée par Junyi Feng Département : Signal et Communications Laboratoire : Labsticc Pôle: CACS Directeur de thèse : Samir Saoudi Soutenue le 19 décembre Jury : M. Charles Tatkeu, Chargé de recherche, HDR, IFSTTAR - Lille (Rapporteur) M. Jean-Pierre Cances, Professeur, ENSIL (Rapporteur) M. Jérôme LE Masson, Maître de Conférences, UBS (Examinateur) M. Ramesh Pyndiah, Professeur, Télécom Bretagne (Examinateur) M. Samir Saoudi, Professeur, Télécom Bretagne (Directeur de thèse) M. Thomas Derham, Docteur Ingénieur, Orange Labs Japan (Encadrant) Acknowledgements This PhD thesis is co-supervised by Doctor Thomas DERHAM fromOrangeLabs Tokyo and by Professor Samir SAOUDI from Telecom Bretagne.
    [Show full text]
  • Advantages and Limitations of Li- Fi Over Wi-Fi and Ibeacon Technologies By
    ISSN (Online) 2321 – 2004 IJIREEICE ISSN (Print) 2321 – 5526 International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering ISO 3297:2007 Certified Vol. 4, Issue 11, November 2016 Review Paper: Advantages and Limitations of Li- Fi over Wi-Fi and iBeacon Technologies By Deepika D Pai Asst. Professor, (Sel Grade), Department of Electronics and Communication Engineering. Vemana Institute of Technology Abstract: Li-Fi can be thought of as a light-based Wi-Fi. That is, it uses light instead of radio waves to transmit information. And instead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information. Light is inherently safe and can be used in places where radio frequency communication is often deemed problematic, such as in aircraft cabins or hospitals. So visible light communication not only has the potential to solve the problem of lack of spectrum space, but can also enable novel application. The visible light spectrum is unused; it's not regulated, and can be used for communication at very high speeds. This paper compares the Li-Fi technology with Wi-Fi and iBeacon technologies. Keywords: Li-fi, Wi-Fi, iBeacon, visible light communication, BLE communication I. INTRODUCTION In recent trends, wireless communication Wi-Fi is gaining government licence. This new Ethernet standard was tremendous importance. CISCO reported that the compatible with devices and technology working on radio compound annual growth rate (CAGR) of mobile data waves and came to be known as ―Wi-Fi‖ only in 1999. usage per month is around 80% which has led to the saturation of the network spectrum consequently bringing iBeacon: The technology was first introduced by Apple at down its efficiency.
    [Show full text]
  • Appendix C: Acronyms and Glossary of Terms
    Appendix C: Acronyms and Glossary of Terms Allocation: The designation of a band of frequencies mined by the amount of information in the signal for a specific radio service or services. Allocations being sent. More complex signals contain more in- are made internationally at World Radio Confer- formation, and hence require wider bandwidths. ences and are incorporated into the international The bandwidth required by a television channel is Table of Frequency Allocations. Domestic alloca- 600 times greater than that of an AM radio chan- tions are made by the Federal Communications nel. Commission (FCC) and the National Telecommu- BETRS: Basic Exchange Telecommunications Radio nications and Information Administration (NTIA). Service. BETRS is used as a wireless substitute to AMPS: Advanced Mobile Phone Service. AMPS is copper loops for providing basic telephone ser- the existing U.S. analog cellular telephone stan- vice. dard. Bps: Bits per second. The rate at which digital data are Analog: In analog radio communications, informa- transmitted over a communications path. Speeds tion is transmitted by continuously varying the are usually designated kbps (thousands of bits per phase, amplitude, or frequency of a radio carrier second), Mbps (millions of bits per second), and wave. Gbps (billions of bits per second). Assignment: The granting by a government of the BSS: Broadcasting-Satellite Service. An ITU-defined right to use a specific frequency (or group of fre- service that refers to the delivery of information or quencies) to a specific user or station. Each televi- programming directly from satellites to user re- sion station, for example, is assigned a small group ceivers.
    [Show full text]