WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS

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WLAN-GPRS INTEGRATION FORNEXT-GENERATION MOBILE
DATA NETWORKS

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• 692430028

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Outline

• INTRODUCTION
• INTEGRATED WLAN AND CELLULAR DATA NETWORKS
• INTERWORKING ARCHITECTURES
• CURRENT STANDARDIZATION ACTIVITIES
• A TIGHT COUPLING ARCHITECTURE
• A LOOSELY COUPLED ARCHITECTURE
• CONCLUDING REMARKS

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1.INTRODUCTION

• More necessity and less luxury on the ability to
  communicate
• 2G -gt 2.5G (GPRS) -gt 3G
• Delay of 3G cellular networks?
• offerings with 3G-like services in efforts to
  generate new revenue stream in todays
  environment.

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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS

• ROAMING
• SESSION MOBILITY
• ENHANCED MOBILE APPLICATIONS

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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS

• Cellular data network provide
• low-speed data service
• over a large coverage area.
• WLAN provides
• high-speed data service
• over a geographically small area.

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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS
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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS

• ROAMING ownership/management problem
• Cellular owned WLAN
• operators are able to enhance their data service
  capabilities with high-speed data connectivity
• WISP owned WLAN
• The WISP may partake in revenue sharing with the
  cellular operator, based on the particular
  roaming agreements between the two parties.

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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS

• SESSION MOBILITY
• An evolutionary step from roaming in this
  integrated environment.
• Session is defined here as a flow of IP packets
  between the end user and an external entity
• EXFTP,HTTP

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2.INTEGRATED WLAN ANDCELLULAR DATA NETWORKS

• ENHANCED MOBILE APPLICATIONS
• The possibility of cellular customers being
  connected to two different access networks, a
  number of enhanced applications can be enabled.
• take advantage of the fact that the end user is
  always connected through a low-speed cellular
  network and sometimes connected through a
  high-speed WLAN.
• EX a mobile email application that schedules the
  delivery of large files when the mobile is
  connected to the WLAN network, and delivers only
  synopses of emails when the mobile is connected
  to the GPRS network.

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3.INTERWORKING ARCHITECTURES

• loose coupling and tight coupling

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4.CURRENT STANDARDIZATION ACTIVITIES

1. Common billing and customer care
2. 3GPP system-based access control and charging
3. Access to 3GPP GPRS-based services
4. Service continuity
5. Seamless services
6. Access to 3GPP

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5.A TIGHT COUPLING ARCHITECTURE

• Tight coupling architecture provides a novel
  solution for interworking between 802.11 WLANs
  and GPRS
• Seamless service continuation across WLAN and
  GPRS
• Reuse of GPRS AAA.
• Reuse of GPRS infrastructure
• Support of lawful interception for WLAN
  subscribers
• Increased security
• Common provisioning and customer care
• Access to core GPRS services

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5. A TIGHT COUPLING ARCHITECTURE
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6. A LOOSELY COUPLED ARCHITECTURE

• In tight coupling, the WLAN data traffic does not
  pass through the GPRS core network but goes
  directly to the operators IP network

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6. A LOOSELY COUPLED ARCHITECTURE
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6. A LOOSELY COUPLED ARCHITECTURE

• AUTHENTICATION
• An authentication similar to GPRS may occur
  within the WLAN network, depending on the
  particular implementation.
• Where the GPRS operator owns the WLAN
• the operator will reuse SIM-based authentication
  (within the WLAN environment.
• for a subscriber to access services provided by a
  GPRS operator over any WLAN access network,
  regardless of whether the WLAN is owned by a GPRS
  operator, (U)SIM-based authentication may be
  used.

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6. A LOOSELY COUPLED ARCHITECTURE

• ENCRYPTION
• A commonly believed weakness of the 802.11 WLAN
  standard is in its encryption technology.
• Wired Equivalent Privacy (WEP) has been shown to
  be a relatively inefficient encryption scheme, if
  used as is as the only form of encryption.
• With the use of EAP, WEP may be enhanced by the
  use of a unique session key for each user of the
  WLAN.

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6. A LOOSELY COUPLED ARCHITECTURE

• BILLING
• Integrated billing is achieved via the billing
  mediator function in the loosely coupled
  architecture of Fig.8
• SESSION MOBILITY
• Mobile IP (MIP) can be used to provide session
  mobility across GPRS and WLAN domains. The MIP
  framework consists of a MIP client (the MS), a
  foreign agent (FA), and a home agent(HA).

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CONCLUDING REMARKS
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CONCLUDING REMARKS
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CONCLUDING REMARKS