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Access Network Discovery and Selection in the Future Broadband Wireless Environment

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  • 1. Competence Center NGNI Fraunhofer FOKUS Access Network Discovery and Selection in the Future Broadband Wireless EnvironmentMarius Corici, Jens Fiedler,Thomas Magedanz, Dragos VingarzanFraunhofer FOKUSBerlin, Germany{Marius-Iulian.Corici, Jens.Fiedler,Thomas.Magedanz, Dragos.Vingarzan}@fokus.fraunhofer.de1
  • 2. Competence Center NGNI Fraunhofer FOKUS Outline Motivation - Access Network Discovery and Selection 3GPP Evolved Packet Core Beyond ANDSF – Subscription based ANDSF – Dynamic Discovery – Location Enabler – Femtocells Discovery and Selection Fraunhofer FOKUS OpenEPC realization – OpenEPC introduction – ANDSF Realization – OpenEPC ANDSF Evaluation Conclusions2
  • 3. Competence Center NGNI Fraunhofer FOKUS Access Network Discovery and Selection Motivation New access technologies are deployed/older accesses are maintained Dense wireless environments More Mobile Devices are now using IP services Mass mobile broadband communication For an optimized network usage network providers have to provide indications on the for access network discovery Common and selection Applications and Services GSM GSM EDGE EDGE WiFi WiFi UMTS UMTS CDMA CDMA IP – based LTE Core Network WiMax WiMax Wireline Wireline POTS/ POTS/ xDSL xDSL ISDN ISDN3
  • 4. Competence Center NGNI Fraunhofer FOKUS Future Service and Network Diversity requires Partnerships4
  • 5. Competence Center NGNI Fraunhofer FOKUS Multi Access Network Service Platforms: From IN to IMS to EPC IT Impact on Telecoms Telecom OMA PIOSE, PSA, Web Service APIs GSMA ONE API Intelligent Open APIs Network (IN) OSA/Parlay/JAIN Parlay X Open Service APIs Service Delivery Web 2.0 IN Services Platform (SOA based) based on SIBs Network Abstraction IMS IN Overlay IP Multimedia Evolved Packet Architecture System (IMS) Core (EPC) Bearer P Mobile oI P l-I Networks V IP Networks Al IP Networks PSTN IP NGN NGMN DSL Cable LTE WIMAX GSM UMTS WLAN WLAN5
  • 6. Competence Center NGNI Fraunhofer FOKUS Concept Reuse: From IMS for NGN to EPC for mobile all-IP networks IMS TISPAN PES NGMN Any Application Platform IPTV NGN ICS MMtel VCC IPTV VCC PoC RCS ic Co n ce pts PES RCS Internet B as Optional Other IMS Basi IMS Application c Co QoS, Charging, ncep ts Platforms Security PCC Evolved Fixed Cable Packet Core Any IP Network Mobile WLAN 4G 3GPP Release 6 2G GPRS 2G 3G LTE/WiMAX GPRS UMTSEPC can be seen as a more generalized „lightweight IMS“,Providng security, QoS, Charging, plus Mobility Managementfor any IP based protocol (HTTP, SIP, P2P, …) 3GPP Release 8 6
  • 7. Competence Center NGNI Fraunhofer FOKUSEvolved Packet Core (EPC) EPC is part of the 3GPP Evolved Packet System (EPS) The EPC is a multi-access core network based on the Internet Protocol (IP) one common packet core network for both – trusted networks including 3GPP Access (LTE-E-UTRAN, UMTS-UTRAN, GPRS-GERAN) Non 3GPP Access (WIMAX, CDMA2000/HRPD) – and untrusted networks including IMS Internet Non-3GPP Access (WLAN) EPC provides connection to IP service domains – IMS Evolved – Internet (or others, e.g. P2P etc.) Packet Core Important EPC functions include: 3GPP – NAS and security (AAA) Non 3GPP – mobility and connectivity management Access Access – policy QoS control and charging (PCC) e.g. LTE trusted trusted / untrusted7
  • 8. Competence Center NGNI Fraunhofer FOKUS 3GPP Evolved Packet Core Mobile Broadband Network Diversity Any Application Platform Voice & SMS Community Cloud RCS Services Computing IPTV M2M Telecom Communication Services Internet VehicularAccess Network Diversity- Access Network Flexibility- Security- QoS & Charging- Mobility Management Evolved- Application Function Flexibility Fixed Packet Core Any IP Network LTE/LTE-A WLAN WiMAX 2G 3G GPRS UMTSEPC provides a subscriber based smart IP pipeto the mobile devices including security, QoS, charging +Transparent Mobility Management 8
  • 9. Competence Center NGNI Fraunhofer FOKUSEPC Capabilities = Seamless IP Connectivity (= ABC) The EPC allows multiple access networks to be connected in a controlled way (secure, QoS, seamless) to either – the operator IP cloud (e.g. IMS or any intranet) – the internet or others Clouds Note that the EPC provides controlled IP connectivity, in regard to (SaaS) – User authentication and authorization – Quality of Service and related Charging – Mobility Management Internet E-UTRAN HTTP / ??? Packet UTRANIP Connectivity EPC GW EP C = EPC = IP Connec Packet tivity WiMAX GW SIP User Equipment IMS may be connected to several IP service WLAN domains in parallel9
  • 10. Competence Center NGNI Fraunhofer FOKUS IMS is the common control platform within the NGN for many Application Domains P/ISDN VOIP, Videoconf., Emulation IM, FMC, Presence IPTV Web 2.0 What about other IP Applications P/ISDN Emulation IMS IP Multimedia Streaming/IPTV Subsystem Subystem VoIP/SkypeConverged Subsystem supports all NGN (all-IP) Evolved Best Packet Core effort Reusable Transport Internet Support Systems PSTN10
  • 11. Competence Center NGNI Fraunhofer FOKUSANDSF Positioning within full EPC Architecture Operator ANDSF HSS IP Services MME (e.g. IMS) PCRF Internet GERAN Serving PDN SGSN GW GW UTRAN AAA eNB Access GW E-UTRAN WLAN ePDG Trusted 3GPP / non-3GPP Access WLAN Untusted non-3GPP Access11
  • 12. Competence Center NGNI Fraunhofer FOKUS 3GPP Evolved Packet Core in a Nutshell Access Network Discovery and Selection Function (ANDSF) Separated data and control planes Gateways – Enforce decisions on the data path – Maintain transparent the mobility Control entities – PCRF & MME – Policy based decisions – Authentication & Access Control – Resource reservation (QoS) HSS – the subscriber database ANDSF – the novel entity for access network discovery and selection – Provides indications to the mobile device Information is transferred as XML data – Application level communication to the mobile devices OMA Device Management over HTTP over TLS or other – No other connections to the network provider functions12
  • 13. Competence Center NGNI Fraunhofer FOKUS Beyond ANDSF Extensions and Further Development ANDSF is in an initial stage of standardization – Only the minimal interface to the mobile device is defined – Limited definition on how the ANDSF should work internally – No connection to other entities Relies only on its own information for the decisions – Limited dynamic operations Extensions proposed: – Subscription based ANDSF – Dynamic Access Network Discovery Information – ANDSF as Location Enabler – ANDSF for Femtocells Discovery and Selection13
  • 14. Competence Center NGNI Fraunhofer FOKUS Beyond ANDSF (II) Decisions based on Subscription Profiles Efficient processing oriented towards the users and their devices – Selection based on the access networks to which the user is allowed to connect to – Selection based on the device capabilities ANDSF is a OMA DM enabled component Reducing the information exchanged over the wireless link Reducing the required processing in the mobile device14
  • 15. Competence Center NGNI Fraunhofer FOKUS Beyond ANDSF (III) Dynamic Discovery Independence of operator provisioned accesses – Over-The-Top enabler for the Always Best Connected scenario – Access Failover immediate processing – No administrative operations requested Mobile Devices feed the Coverage Map with information on vicinity accesses The dynamic discovery information is transferred back to the mobile devices15
  • 16. Competence Center NGNI Fraunhofer FOKUS Beyond ANDSF (IV) ANSDF as Location Enabler Support from the Always-Best-Connected enabler towards the services – Mobile devices transfer to ANDSF location information ANDSF can provide this information to services – Single location mechanism – Communication of ANDS requirements towards the ANDSF – Independence from the network operators may be obtained16
  • 17. Competence Center NGNI Fraunhofer FOKUS Beyond ANDSF (V) Femtocell Discovery and Selection Femtocells are small area cells of a wide area technology (i.e. UMTS, LTE etc.) – Designed to extend the available throughput in specific areas – at home premises In initial stages femtocells will be deployed only at the user premises Discovery and selection of femto-accesses is similar to the WiFi discovery and selection Limited coverage Limited users – only the house-hold users Fast loss of signal ANDSF provides the means to integrate femto-accesses for network discovery and selection – Integration with the wide area network increases the overhead of processing The femtocells are not available for all the users! – For the ANDSF, the access network selection is similar to the inter-technology selections17
  • 18. Competence Center NGNI Fraunhofer FOKUS Fraunhofer FOKUS Realization - OpenEPC The research platform for Future Mobile Communication OpenEPC research toolkit includes the main functionality of the 3GPP Evolved Packet Core (Release 9): – High performance – Adaptable to different deployments – Extensible to specific reseach needs OpenEPC can be used for R&D in the fields of: – QoS, Mobility, Security, Mobile Applications OpenEPC Rel. 1 enables: – Subscription based procedures for: Always Best Connected scenario Resource Reservation – Mobility Support – Mobile device integration – Integration with specific applications More information: www.OpenEPC.net18
  • 19. Competence Center NGNI Fraunhofer FOKUS Fraunhofer FOKUS Realization – OpenEPC (II) OpenEPC ANDSF ANDSF contains the following functions: – Coverage Map – information on the access networks available – Subscriber Info – maintains information on the subscribers using the NDS service – Sh Interface – retrieves subscription profile from the HSS – S14 Server – retrieves requests from the mobile devices – Dynamic Policy Generator – a policy engine generating specific policies based on the triggers and on the information received from the other entities Mobile Device Extension: small application – ANDS Repository – maintains the information received from ANDSF – Device Interface Controller – connection to the device interfaces – S14 Client – interface of communication with the ANDSF – ANDS Logic – processing logic for the policies19
  • 20. Competence Center NGNI Fraunhofer FOKUS Fraunhofer FOKUS Realization – OpenEPC (III) OpenEPC ANDSF Evaluation Scenario Operators are able to balance subscribers between access networks The best access network is selected for the current requirements of the mobile devices1. New policies have to be pushed to the mobile device – ANDSF policy engine takes the decision based on: Subscriber information Location changed (received from the mobile device) Coverage Map changes Administrative (through the admin console)2. OMA DM Push mode communication3. Policy evaluation in the mobile device4. A handover is triggered The procedure is independent of the actual communication (such as a different application) no high time constraints are considered no influence on the seamless handovers 20
  • 21. Competence Center NGNI Fraunhofer FOKUS OpenEPC R&D Topics Goal is to cover the entire technology spectrum for communication for vertically integrated research in the area of future mobile seamless communication from mobile devices to applications Network Support for Future Mobile Applications Mobile Cloud Computing Remote management of smart home environment M2M communication / sensor network integration Ambient Aware Applications /Future Internet Network Enablers Mobility Management Resource Management & Security Harmonization of mobility layers Convergence for fixed and mobile QoS and AAA topics Scalability of Next Gen Mobile Networks Packet classification mechanisms Multi-access and IP flow mobility Evolution of PCC & QoS support for all-IP data services Traffic steering Aspects of Femtocell integration to EPC Optimized Access Network Discovery and Selection Mobile device support for mobility21
  • 22. Competence Center NGNI Fraunhofer FOKUS Related Testbed Future Seamless Communications (FUSECO) Playground State of the art testbed infrastructure as a cooperation of Berlin’s Next Generation Mobile Network expertise for – EPC from Fraunhofer FOKUS – LTE-Advanced at the Fraunhofer HHI – WLAN Networks at the Berlin Open Wireless Network from the Dt. Telekom Labs @ TU Berlin Enabling to prototype application support for – handover optimization across heterogeneous networks – support for Always Best Connected (ABC) – subscriber profile based service personalization – QoS provisioning and related charging – controlled access to IMS based services – controlled access to Internet/Mobile Clouds More information: www.fuseco-playground.org22
  • 23. Competence Center NGNI Fraunhofer FOKUS Conclusions Access Network Discovery and Selection is an open research issue for future mass mobile broadband communication A set of extension concepts can be considered as to optimize the usage of the network – Subscriber information based decisions – Dynamic discovery – Location enabler for applications for ANDSF – Femto-access discovery and selection Fraunhofer FOKUS OpenEPC toolkit enables the research in the area of mass mobile broadband communication – Includes access network discovery and selection functionality OpenEPC ANDSF contains the 3GPP standard features + the Subscriber information based decisions – OpenEPC ANDSF is the foundation for further research in the area of access network discovery and selection OpenEPC ANDSF was evaluated through an Always Best Connected scenario – No implications on the active communication of the mobile devices was perceived23
  • 24. Competence Center NGNI Fraunhofer FOKUSComing up1st FOKUS FUSECO Forum Right after ICIN in Berlin „Business and Technical Challenges of Seamless Service Provision in Converging Next Generation Fixed and Mobile Networks" Follow up of famous FOKUS IMS Workshop Series Event date: October 14-15, 2010 – Day One: LTE and EPC Tutorials and FUSECO Playground Demos – Day Two: Interactive Workshop with Operator Talks and Vendor Panel More at: www.FUSECO-Forum.org24 Sponsorship Options are still available!
  • 25. Competence Center NGNI Fraunhofer FOKUSComing upIEEE Globecom FUSECO Workshop Follow up of Globecom 2009 NGMN/EPC Business Developing Forum Paper Submission due: July 2, 2010 Conference date: December 10, 2010 More at www.FUSECO-workshop.org25
  • 26. Competence Center NGNI Fraunhofer FOKUS Questions ??? www.OpenEPC.net www.FUSECO-Playground.org26
  • 27. Competence Center NGNI Fraunhofer FOKUS Recent Publications Corici M., Magedanz T., Vingarzan D., Weik P., „Enabling Ambient Aware Service Delivery in Heterogeneous Wireless Environments”, IEEE Globecom 2010 - Communications Software, Services and Multimedia Applications Symposium - Next Generation Services and Service Platforms, 6-10 Dec. 2010, Miami, USA, accepted for publication Corici M., Magedanz T., Vingarzan D., Pampu C., Zhou Q., „Access Network Reselection based on Momentary Resources in a Converged Wireless Environment”, IEEE Globecom 2010 - Next Generation Networking Symposium - IEEE Globecom 2010 - Next Generation Networking Symposium, 6-10 Dec. 2010, Miami, USA, accepted for publication Corici M., Magedanz T., Vingarzan D., Weik P., „Prototyping Mobile Broadband Applications with the Open Evolved Packet Core”, 2010 14th International Conference on Intelligence in Next Generation Networks (ICIN) - Weaving Applications into the Network Fabric, 11-14 Oct. 2010, Berlin, Germany, accepted for publication Corici M., Magedanz T., Vingarzan D., Pampu C., Zhou Q., "Proactive Vertical Handover Optimizations in the 3GPP Evolved Packet Core”, Second International ICST Conference on Mobile Networks and Management, 22-24 Sep. 2010, Santander, Spain, accepted for publication Corici M., Magedanz T., Vingarzan D., „ 3GPP Evolved Packet Core – the Next Generation Mobile Networks all-IP architecture”, World Telecommunications Congress 2010, Vienna, Austria, accepted for publication Corici M., Fiedler J., Magedanz T., Vingarzan D., „ Access Network Discovery and Selection in the Next Generation Mobile Networks Environment”, in Proceedings of Mobilware 2010, The Third International ICST Conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications, Chicago, USA. Corici M., Gouveia F., Magedanz T., Vingarzan D., “OpenEPC: A Technical Infrastructure for Early Prototyping of Next Generation Mobile Network Testbeds”, in Proceedings of TRIDENTCOM 2010, 6th International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, Berlin, Germany.27