evoluzione delle reti mesh con collegamenti eterogenei ad alta velocità
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Intervento di Antonio Capone, Politecnico di MilanoTRANSCRIPT
Politecnico di MilanoAdvanced Network Technologies Laboratory
Evoluzione delle Reti Mesh con Collegamenti Eterogenei ad Alta Velocità
Antonio Capone
Roma, 2 Dicembre 2008
Politecnico di MilanoAdvanced Network Technologies Laboratory
The Evolution toward heterogeneous high speed mesh networking
Antonio Capone
Roma, 2 Dicembre 2008
Antonio Capone 3http://antlab.elet.polimi.it
Ad hoc Networks: myth and reality
Mobile Ad hoc Network (MANET)
sourcedestinationrelay
relay
Huge research effort (~330.000 scientific papers published – source Google Scholar)
Only few real applications
Antonio Capone 4http://antlab.elet.polimi.it
“Sons” of ad hoc networks
Wireless SensorNetworks (WSN)
AD HOC
Wireless MeshNetworks (WMN)
Vehicular Area Networks(VANET)
Antonio Capone 5http://antlab.elet.polimi.it
The Evolution PathToward WMNs
The problem: In many applications creating a wired infrastructure for wireless access networks, like traditional WLAN WiFi, is not possible or too expensive
Ethernet
Solution:Replacing wired infrastructure with wireless links
Antonio Capone 6http://antlab.elet.polimi.it
The Evolution Path Toward WMNs (contd)
First possible solution: Wireless Distribution SystemManual configuration of wireless linksCan be used only with small size networks
Antonio Capone 7http://antlab.elet.polimi.it
The Evolution Path Toward WMNs (contd)
Wireless networks of point-to-point linksUse of point-to-point links based on traditional technologies (e.g. SDH) or low cost ones (WiFi, Hiperlan)Solution adopted by several WISPs and system integratorsTwo possible architectures:
Non-meshed topologiesMeshed topologies with IP based routing (e.g. OSPF)
Weaknesses:Very low flexibilityComplex configuration like with WANNo support for nomadic users
Antonio Capone 8http://antlab.elet.polimi.it
InternetInternet
The “true” Wireless MeshNetworks
Mesh routers (MRs) manage routing automatically based on ad hoc network technologiesDevices are flexible and self-configuringAll or a subset of MRsact as access points (Wi-Fi hot spot)Some devices are the gateways to the Internet
meshgateway
meshrouter
meshclient
Access LinkBackhaulGateway Link
Antonio Capone 9http://antlab.elet.polimi.it
Advantages of WMNs
Not only wireless access but also wireless infrastructureThe only viable solution in most of the application scenariosProbably the best in all cases under the cost/flexibility perspective
WMNs deployment
Ease up time-to-deploymentReduced CAPEX/OPEX
Antonio Capone 10http://antlab.elet.polimi.it
Applications
Large range of application scenarios where creating a wired infrastructure is not possible or cost effective
Municipal wireless networksTemporary networksIndustrial networksRetrofitsSurveillanceEnvironmental monitoringTraffic control
Antonio Capone 11http://antlab.elet.polimi.it
Evolution of WMN beyondWiFi MESH
The concept of mesh networking is not dependent on the communication technology adoptedIt is just based on the idea of creating a flexible and easy to use network that is able to self-configure and dynamically adapt to operation conditions
Antonio Capone 12http://antlab.elet.polimi.it
From traditional IP to mesh networking
The traditional IP technology is today the only one widely adopted in all portions of the network (core and access)Also IP is independent from the communication technologyBut the basic networking paradigm has been unchanged for 30 yearsA huge research effort is ongoing to design the new networking technologies for the Internet of the future
GENI
Internet of the Future
Antonio Capone 13http://antlab.elet.polimi.it
What is the Future Internet?
Courtesy of Dr. Arian ZwegersEuropean Commission
Antonio Capone 14http://antlab.elet.polimi.it
All wireless technologies are going ‘mesh’
Pervasive broadband applications require high capacity wireless networksSmall cells (100-200 m) with high transmission rate (100Mb/s-1Gb/s)The only viable option for creating this type of access networks is meshWiMax mesh mode has been recently standardized (802.16j)LTE relay mode is being considered by standardization committees
Antonio Capone 15http://antlab.elet.polimi.it
Mesh networking as a new paradigm for access networks
Are we really sure that single technology mesh networks are the solution?Also in mesh networks we have an access part and a backboneThe best technology for the access depends on several issues (terminal availability, frequency assignment policies, etc.)While for the backbone we can use all the communication technologies that allow us to provide high capacity links to the huge number of small access cells
Antonio Capone 16http://antlab.elet.polimi.it
Mesh networking as a new paradigm for access networks
Tradition IP networking is not really an option here due to the complexity of network deployment and configuration
Mesh networking is the new paradigm for pervasive, high speed, heterogeneous access network
Mesh networking is the new paradigm for pervasive, high speed, heterogeneous access network
It’s the only approach that can today overcome the obstacles that prevent the creation of large high capacity access networks that exploits the best transmission technologies availableMobility support to nomadic/mobile users as a distinguishing feature
Antonio Capone 17http://antlab.elet.polimi.it
New generation mesh devices
New mesh devices will be able to be equipped with a large number of different interfaces and will be able to dynamically adapt to the application scenario
Point-to-point wireless links
WiMax
LTE
Sensor networks
BPLC
Overlay virtual links
Ethernet
PON...
WiFi, Hiperlan, ... Access technology
(Today WiFi, tomorrow ??)
Antonio Capone 18http://antlab.elet.polimi.it
Experimental Projects in the Academic Labs
MIT RoofnetFirst experimental projectLow cost HWSoftware open-source
Other projectsGeorgiaTech BWN-MeshRice UniversityRutgers Winlab ORBITSUNY Stonybrook HyacinthMobiMESH PoliMI
Several academic projects have contributed to the commercial exploitation of the technology
Antonio Capone 19http://antlab.elet.polimi.it
MobiMESH Project
Started by ANTLab, Politecnico di Milano in 2004Initial goal:
Create an experimental platform for testing innovative solutions for routing, mobility management, network configuration and management
Soon coupled with the goal of:Designing advanced mesh networking solutions and products for the marketThanks to the interest and support of VoiSmart
MobiMESH firstprototype
Antonio Capone 20http://antlab.elet.polimi.it
MobiMESH Project
MobiMESH is now a complete and innovative Wireless Mesh platformWe continue to work on new services and network architecturesThe evolution toward the new generation of mesh networking devices is already a reality in our labs
Antonio Capone 21http://antlab.elet.polimi.it
MobiMESHToday MobiMESH is also a spin-off company of Politecnico di Milano
Partner industriale e commerciale
MESH technology made in Italy
Thanks!
Questions?
Thanks!
Questions?