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Special Topics in Computer Engineering Supervised by Dr . Walid Abu-Sufah Jordan University

Special Topics in Computer Engineering Supervised by Dr . Walid Abu-Sufah Jordan University Department of Computer Engineering. Mazin M. Alzaidi Jordan University Department of Computer Engineering 0040711.

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Special Topics in Computer Engineering Supervised by Dr . Walid Abu-Sufah Jordan University

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  1. Special Topics in Computer Engineering Supervised by Dr . Walid Abu-Sufah Jordan University Department of Computer Engineering

  2. Mazin M. Alzaidi Jordan University Department of Computer Engineering 0040711 Interworking of Packet Switched Networks (Wireless local Area Networks) and Circuit Switched cellular Networks

  3. [1] 3GPP, “Group Services and System Aspects; 3GPP Systems to Wireless Local Area Network (WLAN) Interworking; System Description (Release 7),” TS 23.234. v.7.4.0, May 2003. • [2] Ahmavaara, K., Haverinen, H., and Pichna, R. (2003)`Interworking architecture between 3GPP and WLAN systems', IEEE Commun. Mag., Vol. 41, No. 11, pp.74{81. • [3] Song, W., Zhuang, W., and Saleh, A. (2005) `Interworking of 3G cellular networks and wireless LANs', International Journal of Wireless and Mobile Computing (IJWMC), Vol. x, no. x, pp.xxx{xxx. REFERENCES

  4. 3G WLAN PACKET SWITCHING CIRCUIT SWITCHING Evolution of 3G GPRS 3G Core network 3G/WLAN INTERWORKING OUTLINE

  5. Circuit switching. Wide area coverage. Low data Rate. High security. High QoS. High reliability. 3g

  6. Packet switching. High data rate. Low security. Low QoS. Low reliability. Low area coverage. WLAN

  7. TCP/IP SEGMENT PACKET FRAME 0 , 1

  8. Connectionless oriented service(IP networks). A network technology that breaks up a message into packets. Each packet contains a header. Packets may be fragmented. They can arrive out of order. The destination reassembles the message . packet switching

  9. User 2 User 3 User 1 link packets User 4 User 5 Figure 1: Packet Switching.

  10. User 2 User 3 User 1 link packets User 4 User 5 Figure 1: Packet Switching.

  11. A networking technology that provides a temporary, but dedicated connection between two stations. Establishes a dedicated circuit (or channel) before the users may communicate. Transfer of data. The circuit is terminated when the connection is closed. Circuit switching

  12. User 2 User 3 User 1 link circuit User 4 User 5 Figure 2:Circuit switching.

  13. User 2 User 3 User 1 link circuit User 4 User 5 Figure 2:Circuit switching.

  14. Evolution of 3g • The technology used going from GSM towards 3G is General Packet Radio Service (GPRS).

  15. GPRS • Two new network elements integrated into the GSM architecture : 1)GGSN(gateway GPRS support node ): internetworking unit between GPRS and packet data network(IP multimedia, MMS ,Internet). 2)SGSN(serving GPRS support node): supports the mobile station (location, billing, security).

  16. 3G Core network c PS Domain To Packet Network SGSN GGSN AuC HLR To Access Network CS Domain MSC/VLR GMSC To Circuit Network

  17. Mobile Switching Centre (MSC) :telephone exchange. • Home Location Registration(HLR) :a database for subscribers. • Visitor Location Register(VLR) :temporary database of the subscribers. • Authentication Centre(AuC) :is a function to authenticate each SIM card that connects to the GSM network. • Gateway MSC(GMSC) :gateway for handling incoming calls. 3g Core network

  18. Why INTERWORKING ?

  19. WhyINTERWORKING ?

  20. Why Interworking ?

  21. Ubiquitous connectivity. High-rate data services. What do mobile users get in hotspots ?

  22. The heterogeneous technologies employed in 3G cellular networks and WLANs bring many challenges to the interworking. mobility management. security Support . quality of service (QoS). CHALLENGES FOR 3G/WLAN INTERWORKING

  23. 1) Requires common billing and customer care. 2) 3G subscriber roaming to the WLAN is authenticated and charged by its 3G home network. 3)The 3G packet-switched services are also open to users attached to WLAN. 4,5)Improve the third scenario with higher requirements for services continuity. 6) Allows the access to the 3G circuit-switched services via WLANs. Interworking scenarios

  24. Figure 3: Non Roaming WLAN Inter-working Model

  25. UE: user equipment. • HLR/HSS: entity containing authentication and subscription data. • WAG (WLAN Access Gateway): is a gateway via which the data to/from the WLAN Access Network shall be routed. • PDG(Packet Data Gateway): 3GPP PS services are accessed via PDG. • Authentication Authorization Accounting server(AAA): Authentication identifies the user. Authorization determine which services a valid user may access. Accounting keeps track of time for billing .

  26. Figure 4: Roaming reference model - 3GPP PS based services provided via the 3GPP Home Network

  27. protocol procedure

  28. PSTN AAA AAA Internet WLAN AP WLAN AP WLAN AP IP multimedia MMS 3g/wlan interworking HA HSS(HLR) HSS/ HLR SGSN Operator‘s IP network D GPRS core network Gn Gc MSC/ VLR CS core network Gr SGSN GGSN Gn Gi lu-CS lu-PS lu-PS IWG IWG RNC RNC lur 802.11 WLAN-based IP network Access router IP backbone network lub UTRAN lub FA Distribution system Node B Node B

  29. PSTN AAA AAA Internet WLAN AP WLAN AP WLAN AP IP multimedia MMS 3g/wlan interworking HA HSS(HLR) HSS/ HLR SGSN Operator‘s IP network D GPRS core network Gn Gc MSC/ VLR CS core network Gr SGSN GGSN 3G Core network Gn Gi lu-CS lu-PS lu-PS IWG IWG RNC RNC lur 802.11 WLAN-based IP network Access router IP backbone network lub UTRAN lub FA Distribution system Node B Node B

  30. PSTN PSTN AAA AAA AAA AAA Internet Internet WLAN AP WLAN AP WLAN AP WLAN AP WLAN AP WLAN AP Cellular Network IP multimedia MMS HA HA HSS(HLR) HSS/ HLR HSS(HLR) HSS/ HLR SGSN SGSN Operator‘s IP network Operator‘s IP network D D GPRS core network GPRS core network Gn Gn Gc Gc MSC/ VLR MSC/ VLR CS core network CS core network Gr SGSN SGSN GGSN GGSN Gn Gn Gi Gi Circuit Switching lu-CS lu-CS lu-PS lu-PS IWG IWG IWG IWG RNC RNC RNC RNC lur lur 802.11 WLAN-based IP network 802.11 WLAN-based IP network Access router Access router IP backbone network IP backbone network lub lub UTRAN UTRAN lub lub FA FA Distribution system Distribution system Node B Node B Node B Node B

  31. PSTN AAA AAA AAA Internet WLAN AP WLAN AP WLAN AP IP multimedia MMS 3g/wlan interworking HA HSS(HLR) HSS/ HLR HSS(HLR) HSS/ HLR SGSN Operator‘s IP network D D GPRS core network Gn Gc MSC/ VLR MSC/ VLR CS core network CS core network Gr SGSN GGSN Gn Gi lu-CS lu-CS lu-PS lu-PS IWG IWG RNC RNC RNC RNC lur lur 802.11 WLAN-based IP network Access router IP backbone network lub UTRAN lub FA Distribution system Node B Node B

  32. PSTN AAA proxy AAA AAA Internet WLAN AP WLAN AP WLAN AP IP multimedia MMS Loose-coupling HA HSS/ HLR HSS/ HLR HSS(HLR) HSS(HLR) SGSN Operator‘s IP network D D GPRS core network Gn Gc MSC/ VLR MSC/ VLR CS core network CS core network Gr SGSN GGSN Gn Gi Packet Switching lu-CS lu-CS lu-PS lu-PS IWG IWG RNC RNC RNC RNC lur lur 802.11 WLAN-based IP network Access router IP backbone network lub UTRAN lub FA Distribution system Node B Node B

  33. PSTN AAA proxy AAA AAA Internet WLAN AP WLAN AP WLAN AP Tight-coupling IP multimedia MMS HA HSS/ HLR HSS(HLR) HSS(HLR) HSS/ HLR SGSN Operator‘s IP network D D GPRS core network Gn Gc MSC/ VLR MSC/ VLR CS core network CS core network Gr SGSN GGSN Gn Gi Packet Switching lu-CS lu-CS lu-PS lu-PS IWG IWG RNC RNC RNC RNC lur lur 802.11 WLAN-based IP network Access router IP backbone network lub UTRAN lub FA Distribution system Node B Node B

  34. Quiz!!!

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