DOCSLIB.ORG

Demystifying the Performance of Bluetooth Mesh: Experimental Evaluation and Optimization

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Demystifying the Performance of Bluetooth Mesh: Experimental Evaluation and Optimization Demystifying the Performance of Bluetooth Mesh: Experimental Evaluation and Optimization Adnan Aijaz, Aleksandar Stanoev, Dominic London, and Victor Marot Bristol Research and Innovation Laboratory, Toshiba Europe Ltd., Bristol, United Kingdom fi[email protected] Abstract—Mesh connectivity is attractive for Internet-of- Advertising bearer GATT bearer Model Layer Advertising bearer (not relayed) Things (IoT) applications from various perspectives. The recent Foundation Model Layer Friendship messaging Bluetooth mesh specification provides a full-stack mesh net- Access Layer working solution, potentially for thousands of nodes. Although Node Bluetooth mesh has been adopted for various IoT applications, its Upper Transport Layer Relay node performance aspects are not extensively investigated in literature. Lower Transport Layer This paper provides an experimental evaluation of Bluetooth Friend node Network Layer mesh (using Nordic nRF52840 devices) with an emphasis on those Bearer Layer Low power node aspects which are not well-investigated in literature. Such aspects BLE Core Specification include evaluation of unicast and group modes, performance under different traffic patterns, impact of message segmentation, Fig. 1. System architecture and protocol stack of Bluetooth mesh. and most importantly, latency performance for perfect reliability. The paper also investigates performance enhancement of Blue- Despite growing success of Bluetooth mesh in industry, tooth mesh based on different techniques including parametric academic studies on its performance aspects portray a mixed adjustments, extended advertisements (introduced in Bluetooth 5.0), power control, and customized relaying. Results provide picture. One simulation-based study [3] identifies scalability insights into system-level performance of Bluetooth mesh while as its main limitation. Another study following analytic ap- clarifying various important issues identified in recent studies. proach [4] claims configuration of wide range of parameters Index Terms—Bluetooth, BLE, flooding, IoT, mesh, multi-hop, as the main challenge. Yet another study [5], conducting power control, wireless networks. experimental evaluation, suggests that Bluetooth mesh is better suited to applications with sporadic traffic patterns. On the I. INTRODUCTION other hand, various aspects of Bluetooth mesh performance Mesh networking, which is a key enabler for Internet-of- remain unexplored. One example is the latency performance Things (IoT), is a promising solution for range extension of Bluetooth mesh as most existing studies are heavily focused and improved resilience. Bluetooth is a prominent short-range toward reliability. Bluetooth mesh stack offers a number of connectivity technology which has evolved tremendously over configuration options at different layers that provide the capa- the last decade. Bluetooth mesh (released in 2017) [1] is bility of perfect reliability. Hence, the latency associated with the latest addition to the IoT connectivity landscape. The perfect reliability requires deeper investigation, particularly Bluetooth mesh specification provides a full-stack mesh net- under different communication patterns. The role of Bluetooth working solution for IoT. Bluetooth mesh provides a simple 5.0 for Bluetooth mesh as well as performance enhancement and efficient wireless networking solution potentially provid- techniques are not well-investigated. This necessitates further 1 ing mesh connectivity to thousands of nodes without any experimental evaluation of Bluetooth mesh and performance coordination. In a concurrent development, the Bluetooth 5.0 insights. Investigating performance trade-offs for Bluetooth standard (released in 2016) [2] introduces various new features mesh is crucial to asses its suitability for new near-real-time arXiv:2106.04230v1 [cs.NI] 8 Jun 2021 for IoT including improved data transmission modes, enhance and non-real-time IoT applications. This is also important as frequency hopping, and new Physical (PHY) layers. Bluetooth-based proprietary industrial solutions (e.g., [6] and Bluetooth mesh has been adopted for various IoT appli- [7]) are not compatible with the Bluetooth mesh specification. cations including home/building automation, smart lighting, and industrial wireless sensor networks. In the smart lighting A. Related Work community, Bluetooth mesh is recognized as the killer of the lighting switch due to its distributed control capabilities. Yin et al. [8] conducted a comprehensive survey of Blue- Recently, Silvair2 has deployed one of the largest Bluetooth tooth mesh and Bluetooth 5.0. Rondon et al. [3] investigated mesh networks comprising more than 3500 nodes spread performance of Bluetooth mesh, in terms of reliability, scal- across 17 floors of an office building. ability and delay, through simulations on a grid topology. Hernandez-Solana et al. [4] adopted an analytic approach 1 Bluetooth mesh can support up to 32767 nodes in a network with a for investigating interaction of different Bluetooth mesh pa- maximum of 126 hops. 2https://silvair-media.s3.amazonaws.com/media/filer public/c8/cf/ rameters. Di Marco et al. [9] conducted simulations-based c8cfa7fb-278c-450b-89c6-6c5137ca4fc4/25 02 silvair emc casestudy.pdf evaluation of different data transfer modes of Bluetooth 5.0. advDelay Some studies have conducted experimental evaluation of advInterval advInterval advDelay Advertising Advertising Advertising ADV_EXT_IND_PDU Channel Bluetooth mesh. Leon and Nabi [5] evaluated packet deliv- Event Event Event 37 A ery performance under a convergecast traffic pattern where Ta ADV ADV ADV Channel Advertising PDU PDU PDU 38 all nodes periodically generate data packets for a common procedure Channel Channel Channel 37 38 39 destination. Baert et al. [10] investigated latency bounds with Channel 39 varying number of hops and relays. Jurgens¨ et al. [11] inves- scanInterval T Ts scanWindow scanWindow scanWindow Secondary AUX_ADV_IND tigated application of Bluetooth mesh for indoor localization Data channel Channel Channel Channel 37 38 39 Extended advertising through an experimental setup. Scanning procedure B. Contributions Fig. 2. Illustration of advertising and scanning procedures in Bluetooth mesh. Against this background and existing literature, this pa- PDUs. It also provides acknowledged/unacknowledged mes- per has two main objectives. The first is to conduct ex- sage delivery. The upper transport layer handles encryption, perimental evaluation of Bluetooth mesh with an emphasis decryption, and authentication functions. It also handles con- on performance aspects which are not well-investigated in trol messages which are exchanged between peer nodes. The literature. The second is to investigate potential enhance- access layer acts as an intermediary between the model layers ment/optimization techniques while providing insights into and upper transport layer by providing the upper transport system-level performance. Our experimental evaluation aims layer with a standard format. The foundation model layer to address the following important questions. implements models related to management of the Bluetooth 1) What type of communication/traffic patterns are effi- mesh network. The model layer defines models that provide a ciently supported by Bluetooth mesh? standardized operation for typical use-cases. Models can also 2) What is the latency performance of Bluetooth mesh for be custom-defined. There are three types of models: server perfect reliability, under different modes of operation? model, client model, and control model. 3) Can the performance of Bluetooth mesh be enhanced Fig. 1 also shows the architecture of Bluetooth mesh. The through simple techniques and parametric adjustments? term node is used for any device which is part of the Bluetooth 4) What kind of IoT applications can be supported by mesh network. A device becomes part of the mesh network Bluetooth mesh? through the provisioning process. All nodes in the mesh net- We conduct experimental evaluation of Bluetooth mesh work are capable of transmitting/receiving messages; however, based on a testbed of Nordic nRF528403 devices. The key some optional features provide additional capabilities. The relay nodes distinguishing aspects of our evaluation include different com- are able to retransmit received messages over the munication patterns, different modes of operation, varying advertising bearers. Based on relaying, a message can traverse low power node traffic loads, impact of message segmentation, and latency the whole multi-hop mesh network. A (LPN) performance for 100% reliability. In terms of performance is power-constrained and must use its energy resources as optimization of Bluetooth mesh, we investigate the role of efficiently as possible. LPNs operate in a mesh network with friend node advertising/scanning parameter adjustment, extended adver- significantly reduced duty cycle. A assists the tisements, dynamic power control techniques, and varying operation of LPNs in the mesh network by storing messages number of relays, from a system-level perspective. for these nodes and forwarding upon request. B. Managed Flooding II. OVERVIEW OF BLUETOOTH MESH TECHNOLOGY Bluetooth mesh utilizes a managed flooding approach for A. Protocol Stack and Architecture communication. The managed flooding mechanism is com- Fig. 1 shows the protocol stack of Bluetooth mesh technol- pletely asynchronous and provides a simple approach to ogy. Bluetooth mesh is built over the Bluetooth low energy propagate
Load more

Recommended publications
  • DTC Offers Enhanced MANET Mesh Networking
    DOMO TACTICAL COMMUNICATIONS DTC Offers Enhanced MANET Mesh Networking Rob Garth, Product Director, Domo Tactical Communications (DTC) talks to Soldier Modernisation about MANET Mesh Networks and the technology behind them actical MANET Mesh networks have become MANET Mesh Networks are also seamlessly self-healing a key part of the battlefield communications - if a node is removed or a link is broken, for example due Tpicture, most notably in solving the “Dismounted to interference or the introduction of a large obstacle, then Situational Awareness” challenge - delivering media the Mesh will try and re-route via another path. For a dense and data rich applications as well as video to and from cluster of nodes, this can provide significant redundancy and the dismounted soldier. Mesh networks have many resilience. But Garth notes “This is not magic. The resilience advantages over traditional military communications achieved is dependant very much on network topology - if systems, not least in their ease of configuration, ease of for example nodes are arranged in a long line, with each link deployment and in-built resilience. operating at the extreme of its range, and the node in the But as Rob Garth, Product Director at Domo Tactical middle is taken out then connectivity between the two ends Communications (DTC) notes “Mesh networks are resilient of the line will be lost.” and very tolerant to poor deployment, however to get the But when it comes to resilience, not all Mesh networks most out of the Mesh it is important to understand a little are the same - some are reliant on a central “Master Node” about the technology so that the right equipment can be or “Mobility Controller” to disseminate routing and path chosen and sensible deployment decisions can be made.” quality information, which can lead to a single point of MANET Mesh networks share some key characteristics: failure.
    [Show full text]
  • Hybrid Wireless Mesh Network, Worldwide Satellite Communication, and PKI Technology for Small Satellite Network System
    Hybrid Wireless Mesh Network, Worldwide Satellite Communication, and PKI Technology for Small Satellite Network System A project present to The Faculty of the Department of Aerospace Engineering San Jose State University in partial fulfillment of the requirements for the degree Master of Science in Aerospace Engineering By Stephen S. Im May 2015 approved by Dr. Periklis Papadopoulos Faculty Advisor 1 ©2015 Stephen S. Im ALL RIGHTS RESERVED 2 An Abstract of Hybrid Wireless Mesh Network, Worldwide Satellite Communication, and PKI Technology for Small Satellite Network System by Stephen S. Im1 San Jose State University May 2015 Small satellites are getting the spotlight in the aerospace industry because this earth- orbiting technology is well-suited for use in military service, space mission research, weather prediction, wireless communication, scientific observation, and education demonstration. Small satellites have advantages of low cost of manufacturing, ease of mass production, low cost of launch system, ability to be launched in groups, and minimal financial failure. Until now, a number of the small satellites have been built and launched for various purposes. As network simplification, operation efficiency, communication accessibility, and high-end data security are the fundamental communication factors for small satellite operations, a standardized space network communication with strong data protection has become a significant technology. This is also highly beneficial for mass manufacture, compatible for cross-platform, and common error detection. And the ground-based network technologies which fulfill Internet-of-Things (IOT) concept, which consist of Wireless Mesh Network (WMN) and data security, are presented in this paper. 1 Graduate Student, San Jose State University, One Washington Square, San Jose, CA.
    [Show full text]
  • Etsi Tr 103 495 V1.1.1 (2017-02)
    ETSI TR 103 495 V1.1.1 (2017-02) TECHNICAL REPORT Network Technologies (NTECH); Automatic network engineering for the self-managing Future Internet (AFI); Autonomicity and Self-Management in Wireless Ad-hoc/Mesh Networks: Autonomicity-enabled Ad-hoc and Mesh Network Architectures 2 ETSI TR 103 495 V1.1.1 (2017-02) Reference DTR/NTECH-AFI-0018-GANA-MESH Keywords architecture, autonomic networking, self-management, wireless ad-hoc network, wireless mesh network 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 The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (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 https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI.
    [Show full text]
  • Zigbee Mesh Network Performance
    AN1138: Zigbee Mesh Network Performance This application note details methods for testing Zigbee mesh network performance. With an increasing number of mesh networks available in today’s wireless market, it is KEY POINTS important for designers to understand the different use cases among these networks and their expected performances. When selecting a network or device, designers need • Wireless test network in Silicon Labs to know the network’s performance and behavior characteristics, such as battery life, Research and Development (R&D) is network throughput and latency, and the impact of network size on scalability and relia- described. bility. • Wireless conditions and environments are evaluated. This application note demonstrates how the Zigbee mesh network differs in perform- ance and behavior from other mesh networks. Tests were conducted using Silicon • Mesh network performance including throughput, latency, and large network Labs’ Zigbee Mesh software stacks and the Wireless Gecko SoC platform capable of scalability is presented. running Zigbee Mesh and Proprietary protocols. The test environment was a commer- cial office building with active Wi-Fi and Zigbee networks in range. Wireless test clus- ters were deployed in hallways, meeting rooms, offices, and open areas. The method- ology for performing the benchmarking tests is defined so that others may run the same tests. These results are intended to provide guidance on design practices and principles as well as expected field performance results. Additional performance benchmarking information for other technologies is available at http://www.silabs.com/mesh-performance. silabs.com | Building a more connected world. Rev. 0.3 AN1138: Zigbee Mesh Network Performance Introduction and Background 1.
    [Show full text]
  • Wi-Fi® Mesh Networks: Discover New Wireless Paths
    Wi-Fi® mesh networks: Discover new wireless paths Victor Asovsky WiLink™ 8 System Engineer Yaniv Machani WiLink 8 Software Team Leader Texas Instruments Table of Contents Abstract ...................................................................................................1 Introduction .............................................................................................1 Mesh network use case .........................................................................2 General capabilities ...............................................................................2 Range extension use case .....................................................................3 AP offloading use case ..........................................................................3 Wi-Fi mesh key features ........................................................................4 Homogenous ........................................................................................4 Self-forming ...........................................................................................4 Dynamic path selection .........................................................................4 Self-healing ...........................................................................................5 Possible issues in mesh networking ......................................................6 WLAN mesh deployment considerations .............................................7 Number of hops ....................................................................................7
    [Show full text]
  • Investigation and Performance Optimization of Mesh Networking in Zigbee
    Periodicals of Engineering and Natural Sciences ISSN 2303-4521 Vol. 8, No. 2, June 2020, pp.790-801 Investigation and performance optimization of mesh networking in Zigbee Essa Ibrahim Essa1, Mshari A. Asker2, Fidan T. Sedeeq3 1Department of Networks, College of Computer Science and Information Technology, University of Kirkuk 2 Departement of Computer Science, College of Computer Science and Mathematics, Tikrit University 3 Department of Electrical Engineering, College of Engineering, University of Kirkuk ABSTRACT The aim of this research paper is to perform a detailed investigation and performance optimization of mesh networking in Zigbee. ZigBee applications are open and global wireless technology that are based on IEEE 802.15.4 standard, it is used for sense and control in many fields like, military, commercial, industrial and medical applications. Extending ZigBee lifetime is a high demand in many ZigBee networks industry and applications, and since the lifetime of ZigBee nodes depends mainly on batteries for their power, the desire for developing a scheme or methodology that support power management and saving battery lifetime is of a great requirement. In this research work, a power sensitive routing Algorithm is proposed Power Sensitive Ad hoc On-Demand (PS-AODV) to develop protocol scheme and methodology of existing on-demand routing protocols, by introducing an algorithm that manages ZigBee operations and construct the route from trusted active nodes. Furthermore, many aspects of routing protocol in ZigBee mesh networks have been researched to concentrate on route discovery, route maintenance, neighbouring table, and shortest paths. PS-AODV routing algorithm is used in two different ZigBee mesh networks, with two different coordinator locations, one used at the centre and the other one at the corner of the networks.
    [Show full text]
  • Mesh Networks
    Mesh Networks Developed by Sebastian Büttrich, wire.less.dk 7 November 2005 ItrainOnline MMTK www.itrainonline.org 1 Sebastian Büttrich Session overview · Mesh topology · Motivations, expectations and limitations · Mesh routing protocols · Mesh hardware · Mesh oriented software · Mesh case stories · Issues in mesh networking 7 November 2005 ItrainOnline MMTK www.itrainonline.org 2 Sebastian Büttrich Mesh topology - definition · A mesh network is a network that employs one of two connection arrangements, full mesh topology or partial mesh topology. In the full mesh topology, each node is connected directly to each of the others. In the partial mesh topology, nodes are connected to only some, not all, of the other nodes." 7 November 2005 ItrainOnline MMTK www.itrainonline.org 3 Sebastian Büttrich Mesh topology - definition · Mesh, the simple way: 7 November 2005 ItrainOnline MMTK www.itrainonline.org 4 Sebastian Büttrich Mesh topology - definition: full & partial mesh Mesh topology ± what it is not (necessarily): dynamic · Nothing is necessarily dynamic in a mesh. However, in recent years, and in connection with wireless networks, the term "mesh" is often used as a synonym for "ad hoc" or "mobile" network. Obviously, combining the two characteristics of a mesh topology and ad hoc capabilities is a very attractive proposition. 7 November 2005 ItrainOnline MMTK www.itrainonline.org 6 Sebastian Büttrich Mesh topology ± a common understanding · Mesh network - a network that handles many-to-many connections and is capable of dynamically updating
    [Show full text]
  • Technical Paper TELECOMMUNICATION STANDARDIZATION SECTOR (12/2011) of ITU
    International Telecommunication Union ITU-T Technical paper TELECOMMUNICATION STANDARDIZATION SECTOR (12/2011) OF ITU SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Wireline broadband access networks and home networking Foreword Malcolm Johnson Director ITU Telecommunication Standardization Sector This new Technical paper gives a valuable overview of the technologies forming modern access networks, based primarily on ITU-T access network and home networking standards (“ITU-T Recommendations”). The Technical paper’s overall aim is to provide a non-expert reader with the background information necessary to an understanding of the context and content of these ITU-T Recommendations; offering practical guidance to administrations, operators and suppliers in planning and implementing the access networks of fundamental importance to our modern world. Access network technology is advancing rapidly with close to six hundred million subscribers possessing broadband connections to the Internet1. Many of them connect using ITU standardized technologies covering for example; digital subscriber line (DSL) technology, cable modems, or fibre to the home (FTTH). Fixed broadband services are delivered in a variety of ways: over direct optical fibre connections, traditional telephone networks, coaxial cable in community access television (CATV) networks, wireless networks, or even via electricity distribution grids. A broadband connection delivers data, voice and video at unprecedented speeds, with vectored VDSL2 (Recommendation ITU-T G.993.5) achieving aggregate bit-rates in the region of 250 Mb/s, and the “G.fast for FTTdp (Fibre-to-the-Distribution Point)” standardization project, to be completed by March 2014, will increase these rates to an extraordinary 1 Gb/s. The networks enabling such high-speed data exchange are considered critical to spurring economic growth and bridging the digital divide.
    [Show full text]
  • Leveraging Mesh Networking for Disaster Communication in Poor Regions of the World
    1 WiMesh: Leveraging Mesh Networking For Disaster Communication in Poor Regions of the World Usman Ashraf1, Amir Khwaja2, Junaid Qadir3, Stefano Avallone4, Chau Yuen5 Abstract—This paper discusses the design, implementation and perhaps at the forefront of this wireless revolution and have field trials of WiMesh - a resilient Wireless Mesh Network penetrated even remote areas around the world. However, (WMN) based disaster communication system purpose-built for there are still some scenarios where these technologies fail. underdeveloped and rural parts of the world. Mesh networking is a mature area, and the focus of this paper is not on proposing In particular, the cellular infrastructure as well as the existing novel models, protocols or other mesh solutions. Instead, the Public Switched Telephone Network (PSTN) may be destroyed paper focuses on the identification of important design con- during disasters and alternate means may need to be investi- siderations and justifications for several design trade offs in gated for disaster communication. Moreover, despite its deep the context of mesh networking for disaster communication in penetration, there are still sizable areas of population at remote developing countries with very limited resources. These trade- offs are discussed in the context of key desirable traits including locations where the low return on investment (ROI) along security, low cost, low power, size, availability, customization, with the difficulty of terrain have made deployment of cellular portability, ease of installation
    [Show full text]
  • Bluetooth Low Energy Mesh Networks: a Survey
    sensors Review Bluetooth Low Energy Mesh Networks: A Survey Seyed Mahdi Darroudi and Carles Gomez * Department of Network Engineering, Universitat Politècnica de Catalunya, Castelldefels 08860, Spain; [email protected] * Correspondence: [email protected]; Tel.: +34-93-413-7206 Received: 15 May 2017; Accepted: 20 June 2017; Published: 22 June 2017 Abstract: Bluetooth Low Energy (BLE) has gained significant momentum. However, the original design of BLE focused on star topology networking, which limits network coverage range and precludes end-to-end path diversity. In contrast, other competing technologies overcome such constraints by supporting the mesh network topology. For these reasons, academia, industry, and standards development organizations have been designing solutions to enable BLE mesh networks. Nevertheless, the literature lacks a consolidated view on this emerging area. This paper comprehensively surveys state of the art BLE mesh networking. We first provide a taxonomy of BLE mesh network solutions. We then review the solutions, describing the variety of approaches that leverage existing BLE functionality to enable BLE mesh networks. We identify crucial aspects of BLE mesh network solutions and discuss their advantages and drawbacks. Finally, we highlight currently open issues. Keywords: Bluetooth Low Energy; Bluetooth Smart; mesh networks; survey; Internet of Things; IoT; 6LoWPAN; 6Lo; Bluetooth Smart Mesh 1. Introduction Bluetooth Low Energy (BLE), also marketed as Bluetooth Smart, has emerged as a major low-power wireless technology [1]. Leveraging a design that can reuse classic Bluetooth circuitry to a large extent, BLE has gained a dominant position in smartphones. This allows low-energy communication between the latter and other devices such as sensors, actuators, wearables, etc.
    [Show full text]
  • Consumer Networking Gains Wi-Fi Mesh Enterprise Technology Helps Fill the Gaps in Home Environments
    CONSUMER NETWORKING GAINS WI-FI MESH ENTERPRISE TECHNOLOGY HELPS FILL THE GAPS IN HOME ENVIRONMENTS EXECUTIVE SUMMARY Consumers traditionally deploy a single Wi-Fi router for the home and adapt their usage around the router. But, changing needs are rendering this strategy unworkable for many homes as the coverage area needs are increasing, the prevalence of mobile devices is changing the access patterns and a host of consumer Internet of Things (IoT) devices are now entering the home. Commercial Wi-Fi mesh technology has been available for years and can address these needs. Because of these changing needs, consumer networking companies are beginning to bring those technologies to the consumer market to bring a better Wi-Fi experience into the home. TODAY’S CUSTOMER NEEDS When Wi-Fi first made the jump from commercial environments into the home, most PCs were desktops; Wi-Fi was chiefly used to connect a few notebooks to the network for web surfing across a (lower performance) shared connection. Speed and coverage were not critical considerations for consumers as the shared broadband connection was typically slower than the 11Mb/s that 802.11b Wi-Fi delivered at the time. Wi-Fi access is now a staple for device connectivity, growing from linking one or two notebooks to no linking other compute devices including desktops, smartphones and tablets. Additionally, entertainment devices like smart TVs, DVD players and streaming devices (Apple TV, Roku, Sonos, etc.) are now connecting to the network to provide music and video around the house. With the rapid growth of home IoT devices, in the form of doorbells, alarms, thermostats, door locks, security systems, video cameras and more, Wi-Fi connectivity needs to reach to the far edges of the home, into places where wires could never allow.
    [Show full text]
  • ITU-T FG-DR&NRR Deliverable
    International Telecommunication Union ITU-T FG-DR&NRR TELECOMMUNICATION Version 1.0 STANDARDIZATION SECTOR (05/2014) OF ITU ITU-T Focus Group on Disaster Relief Systems, Network Resilience and Recovery Promising technologies and use cases – Part IV and V Focus Group Technical Report 2 3 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecom- munications on a worldwide basis. The procedures for establishment of focus groups are defined in Recommendation ITU-T A.7. The ITU-T Focus Group on Disaster Relief Systems, Network Resilience and Recovery (FG-DR&NRR) was established further to ITU-T TSAG agreement at its meeting in Geneva, 10-13 January 2012. ITU-T Study Group 2 is the parent group of FG-DR&NRR. This Focus Group was successfully concluded in June 2014. Deliverables of focus groups can take the form of technical reports, specifications, etc. and aim to provide material for consideration by the parent group or by other relevant groups in its standardization activities. Deliverables of focus groups are not ITU-T Recommendations. SERIES OF FG-DR&NRR TECHNICAL REPORTS Technical Report on Telecommunications and Disaster Mitigation Overview of Disaster Relief Systems, Network Resilience and Recovery Promising technologies and use cases – Part I, II and III Promising technologies and use cases – Part IV and V Gap Analysis of Disaster Relief Systems, Network Resilience and Recovery Terms and definitions for disaster relief systems, network resilience and recovery Requirements for Disaster Relief System Requirements for network resilience and recovery Requirements on the improvement of network resilience and recovery with mova- ble and deployable ICT resource units © ITU 2014 All rights reserved.
    [Show full text]