UMA allows mobile users to access cellular voice and data services over unlicensed wireless networks like WiFi. The UMA architecture includes an unlicensed wireless network, IP access network, and UMA Network Controller (UNC) that authenticates and authorizes mobile devices to access the core cellular network. The UNC facilitates seamless handovers between licensed cellular networks and unlicensed wireless networks, allowing subscribers to roam between the networks transparently while on calls or data sessions.

1. Unlicensed Mobile Access (UMA) Presented By KATHAN BHATT (07CE109) Guided By Mrs. PAYAL PATEL Gandhinagar Institute of Technology

2. CONTENTS What is UMA Overview Working UMA Architecture UMA Network Controller Security Advantages Disadvantages Conclusion Gandhinagar Institute of Technology

4. Subscribers are enabled to roam and handover between cellular networks and wireless networks

5. UMA Technology specification was published in September 2004

6. 3GPP approved the specification as “Generic Access”

7. The 3rd Generation Partnership Project, 3GPP is the collaboration agreement that brings together a number of telecommunications standards bodies.Gandhinagar Institute of Technology

9. Once connected the handset contacts the UMA network controller over the broadband IP access network to be authenticated and authorized toaccess GSM (Global System for Mobile communication) voice and GPRS(General Packet Radio Service) data services via the unlicensed wireless network.

10. If approved, the subscriber’s current location information stored in the core network is updated, and from that point on all mobile voice and data traffic is routed to the handset via the Unlicensed Mobile Access Network (UMAN) rather than the cellular radio access network (RAN).Gandhinagar Institute of Technology

12. HANDOVER: If a subscriber is on an active GSM voice call or GPRS data session when they come within range (or out of range) of an unlicensed wireless network, that voice call or data session can automatically handover between access networks with no discernable service interruption. Handovers are completely transparent to the subscriber. Gandhinagar Institute of Technology

13. Working of UMA Gandhinagar Institute of Technology

15. UMAN has 3 major entities

16. Unlicensed wireless network

17. IP access network

18. UMA Network controller (UNC)

19. UNC authorizes and authenticates the Mobile devices for accessing the Core NetworkGandhinagar Institute of Technology

20. UMA Network Controller Gandhinagar Institute of Technology

21. Parts of Network Controller IP The protocol which specifies the format of information 'packets' transported over the Internet, including how the packets are addressed for delivery. Media Gateway A Media gateway is a translation device or service that converts digital media streams between disparate telecommunications networks. AAA Authentication, Authorization and Accounting HLR/HSS Home Location Register/Home Subscriber Server Gandhinagar Institute of Technology

22. UMA and Baseline Security Although UMA creates new business opportunities for GSM service providers, the introduction of the UMA Network Controller (UNC) into the GSM/GPRS core also exposes the network to new security threats. GSM service providers need to consider the following security implications of adding the UNC into their network in order to protect their investment, brand image and new revenue generating services: • UMA high speed access opens traditional GSM/GPRS radio access network to a public IP world • UMA is vulnerable to many GSM/GPRS alike attacks • UNC is publicly reachable • Many existing known security concerns in WLAN, GSM/GPRS are part of the risks within UMA enabled services. Gandhinagar Institute of Technology

24. Maintain the same mobile device identification on unlicensed wireless networks and licensed cellular networks.

25. Better coverage area and relatively better quality and low cost service for the subscriber.

26. Better coverage area, better quality service, increase in revenue for the operator.Gandhinagar Institute of Technology

28. Increasingly, consumers are taking advantage of unlimited or otherwise high-volume data tariffs to make VoIP calls via Skype. While this is an advantage for subscribers, this is a disadvantage for mobile operators who increasingly are looking to UMA as a competitive response to Skype. Gandhinagar Institute of Technology

30. Still, it is not clear whether UMA will be a big hit or not. The operators need to have enough customers with UMA enabled handsets so that their investments to the network side would be profitable. In some countries, such as the United States, UMA is more attractive than in others, due to the worse existing cell coverage. Also, the pricing point is critical for the customers, so that they are willing to buy a UMA enabled mobile handset as well as have the additional radios switched on, sacrificing some standby time. We estimate that UMA in its current form will be properly in use, if it ever will, in around 2 years.Gandhinagar Institute of Technology

31. References www.clevister.com www.wikipedia.com www.google.com Gandhinagar Institute of Technology