completing the convergence puzzle: a survey and a roadmap ieee wireless communications ‧ june 2009...
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Completing the Completing the Convergence Puzzle:Convergence Puzzle:A Survey and A RoadmapA Survey and A Roadmap
IEEE Wireless Communications‧June 2009
DJAMAL-EDDINE MEDDOUR, USMAN JAVAID, AND NICOLAS BIHANNIC, ORANGE LABSTINKU RASHEED, CREATE-NET RESEARCH CENTERRAOUF BOUTABA, WATERLOO UNIVERSITY
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OutlineOutlineIntroductionConvergenceExisting SolutionsComparisonPossible TimeframeConclution
IntroductionIntroductionThis article surveys different
technologies which offer seamless handover and converged access to mobile voice, video, and data services
Home Network Home Network ConvergenceConvergenceThe user can access different
types of services from the same terminal
A service is available on more than one handsets
Diverse communication technologies are expected within the home network sphere
Home Network Home Network ConvergenceConvergenceMainly : Home Gateway
◦Local data exchange◦Interconnection to service platforms
SIP(Session Initiation Protocol) and IMS(IP Multimedia Subsystem)
Access Network Access Network ConvergenceConvergenceTransport layer
◦The reduction in operational expenditure(OPEX) cost Aggregate mobile access nodes into a
backhaul network shared with a fixed access network
The use of a shared infrastructure for heterogeneous access solutions
Service control layer◦Allows to the same service irrespective
of the access network infrastructure
Core Network Core Network ConvergenceConvergenceIMS
◦Mobile access network 3GPP (3G Partnership Program)
◦Fixed broadband access network TISPAN (Telecommunications and Internet
Converged Services and Protocols for Advanced Networks) of ETSI (European Telecommunications Standards Institute)
ITU (International Telecommunications Union) of NGN GSI (Next Generation Networks Global Standard Initiative)
Core Network Core Network ConvergenceConvergenceThe IMS is a core network
infrastructure to control user sessions for the following services:◦Conversational services : voice and
video◦Real-time data-oriented services :
instant messaging and presence◦Audio-visual services
Core Network Core Network ConvergenceConvergenceBenefits expected by the operator
deploying an IMS infrastructure◦To use a common functional
infrastructure for services control◦Allows the operator to better control
resources, especially significant in the mobile domain for packet switching services
◦Service triggering toward application servers in accordance with user service profiles
◦Solution for PSTN (public switched telephone network) renewal and expectations of OPEX/CAPEX (capital expenditure) reductions
Application Server Level Application Server Level ConvergenceConvergenceTo offer differentiated QoSConsider it as a standalone
convergence for Web players◦Allows the operator to set policy on
Qos an charge for services accordingly
Existing Solution Toward Existing Solution Toward Seamless ConvergenceSeamless ConvergenceWLAN (wireless local area network)
◦High data rates to mobile users◦Low network deployment cost
UMTS (Universal Mobile Telecommunications System)◦BSs in UMTS offer larger cells◦Provides nearly worldwide coverage
UMA (Unlicensed Mobile Access)I-WLAN (Interworking WLAN)MIH (media-independent handover)
UMAUMAAccess network levelCurrently endorsed by the 3GPP
under GAN (generic access network)
Offer call continuity from a GAN-capable terminal between local area network and the GSM infrastructure
UMAUMAGb interface : 3GPP definedPSTN (public switched telephone
network)
UMAUMARecent evolution : EGAN (enhanced
GAN)◦Spec. TR 43.902◦Gb Gn ◦Allow GANC (GAN controller) to
interconnect directly with GGSN (GPRS gateway service node)
◦Interface between GAN terminal and GANC : IPSec tunnel Strong security requirement piggyback
I-WLANI-WLAN3GPP standardBetween a WLAN access network
and the 3GPP core networkArchitecture (release 6)
◦WAG (wireless access gateway)◦PDG (packet data gateway)◦AAA server
I-WLANI-WLANWAG
◦Data from UE through fixed Ans are aggregated at the WAG
◦Route packets toward the home domainPDG
◦A gateway toward external PDNs (packet data networks)
AAA server◦Interacts with PDG to perform service-
level AAA functions
I-WLAN protocolsI-WLAN protocolsRemote IP layer
◦Route packets between UE and PDNTunneling layer
◦Tunneling header◦Encapsulate remote IP layer packets◦Decrypt the IP packets
Transport IP layer◦Transport remote IP layer packets
encapsulated into IPSec tunnel
I-WLAN Evolution I-WLAN Evolution SAE (System Architecture
Evolution)◦Support seamless mobility between
heterogeneous access networks◦Mobility is under study for I-WLAN in
release 8 and is based on MIP◦DSMIPv6
MIHMIHDefined : IEEE802.21 working
group◦Defines a framework to support
information exchange that facilitates mobility decisions
◦Support transparent service continuity
◦Considered both wired and wireless technologies
MIHMIHMIES 、 MICS 、 MIIS
ComparisonComparison
Possible TimeframePossible Timeframe
ConclusionConclusionMassive interest
◦WiFi High data rates at low cost Do not guarantee seamless coverage,
especially with high mobility
◦Bluetooth Supports low data rates (compared with
hotspot technologies) Saves in power
◦GSM/GPRS and UMTS Wide area coverage and support high mobility High cost