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The survey-of_handoff_issues_in_wireless_ATM


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The survey-of_handoff_issues_in_wireless_ATM

  1. 1. The Survey of Handoff Issues in Wireless ATM(WATM) Networks
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  3. 3. Abstract This paper presents the literature survey of WATM and its hand off related issues.The paper reviews ATM fundamentals and its benefits. It deals with WATM features, requirements, protocol architectures and the global activities. The focus is made on the handoff related aspects of WATM : the handoff management operation, requirements, protocols, proposed solutions and open issues for research.
  4. 4. ATM <ul><li>ATM is a data transport technology that supports a single high-speed infrastructure for integrated broadband communication involving voice,video and data. </li></ul><ul><li>The important features of ATM technology include: short fixed-size packets or cells,virtual circuits, and integrated services. </li></ul>
  5. 5. ATM Provides <ul><li>Quality Of Service(QOS) ‏ </li></ul><ul><li>ATM gave rise to Wireless ATM(WATM) networks </li></ul><ul><li>It helps to bring multimedia to the desktop </li></ul><ul><li>WATM provides similar services to mobile computers and devices </li></ul><ul><li>A solution for next generation personal communication networks(PCN) ‏ </li></ul>
  6. 6. Benefits of ATM <ul><li>High Performance via Hardware switching. </li></ul><ul><li>Dynamic bandwidth for bursty traffic. </li></ul><ul><li>Class of service support for multimedia. </li></ul><ul><li>Scalability in speed and network size. </li></ul><ul><li>Common architecture for LAN, MAN and WAN. </li></ul><ul><li>Opportunity for simplification via Virtual Circuit(VC) architecture. </li></ul><ul><li>International standard compliance. </li></ul>
  7. 7. Benefits of ATM
  8. 8. Challenges that need to be resolved for WATM <ul><li>The allocation of appropriate radio frequency bands for broadband. </li></ul><ul><li>Requirements of new radio technology and access methods for highspeed operation. </li></ul><ul><li>Location management for tracking mobile terminals. </li></ul><ul><li>Dynamic reestablishment of virtual circuits to new access points. </li></ul><ul><li>End-to-end QoS provisioning. </li></ul>
  9. 9. WATM <ul><li>Wireless ATM is an emerging network technology that combines the multi-service, multimedia capabilities of ATM with user mobility and wireless access. </li></ul><ul><li>The need for the Wireless ATM arose due to the sophistication of end-user telecommunications services and applications. </li></ul>
  10. 10. WATM Network Architechture
  11. 11. <ul><li>It supports wireless access to telecommunication services with a high multimedia content. </li></ul><ul><li>It provides atleast limited terminal. </li></ul><ul><li>It is deployed well integrated into the ATM infrastructure used for fixed communication ,such that it will not affect fixed-only communication. </li></ul><ul><li>It is implemented in a way that allows sharing of key network resources, such as transmission links and switches. </li></ul>
  12. 12. WATM Characteristics <ul><li>Cellular Architecture </li></ul><ul><li>Resource Allocation </li></ul><ul><li>Mobility Management </li></ul>
  13. 13. Handoff in Wireless ATM Networks
  14. 14. <ul><li>Initiation: It involves handoff decision making,where in the need for handoff is identified by either MT or network agent. </li></ul><ul><li>New Connection generation: It involves the generation of new connections which comprises of finding new resources and performing additional routing operations. </li></ul><ul><li>Data flow control: It involves data delivery along new established path with the agreed QoS guarantees. </li></ul>
  15. 15. Hand off Types <ul><li>Backward Handoff: In this, the handoff is predicted in advance using radio hint and the execution of handover is initiated via current access point. </li></ul><ul><li>Forward handoff: In this, a MT moves abruptly to new access point and hand over is initiated after the mobile is associated with new access point. </li></ul><ul><li>Hard Hand off: In this, MT communicates with only one access point at anytime. They are characterized by break before make. The current resources are released before new resources are used. </li></ul><ul><li>Soft Hand off: In this, a mobile can communicate with more than one access points during hand off. They are characterized by make before break. Both current and new resources are used during handover. </li></ul>
  16. 16. Handoff Requirements <ul><li>Handoff Latency </li></ul><ul><li>Scalability </li></ul><ul><li>Quality of Service (QoS)‏ </li></ul><ul><li>Signalling Traffic </li></ul><ul><li>Resource consumption efficiency </li></ul><ul><li>Data Integrity </li></ul><ul><li>Group Handover </li></ul><ul><li>Registration and Authentication </li></ul>
  17. 17. Handoff Protocols <ul><li>Full Connection Re-routing </li></ul><ul><li>Route Augmentation </li></ul><ul><li>Partial Connection Re-routing (Incremental Re-establishment) ‏ </li></ul><ul><li>Multicast Connection Rerouting </li></ul>
  18. 18. Comparison of handoff management approaches
  19. 19. Handoff management issues <ul><li>QoS </li></ul><ul><li>Re-routing connections </li></ul><ul><li>Point to multipoint </li></ul><ul><li>Mobile to Mobile handoff </li></ul><ul><li>Optimization </li></ul>
  20. 20. Conclusion <ul><li>Wireless ATM provides wireless extension to ATM based ISDN networks. This paper reviews the important aspects of wireless ATM and the handoff related issues. It reviews the basic concepts and benefits of ATM. </li></ul><ul><li>Then the important features of WATM, service models,protocol model, the key characteristics of WATM and the global activities on WATM are dealt. The paper focusses on the survey of Handoff techniques in WATM and related issues. The Handoff requirements, various strategies and open issues are discussed. </li></ul>
  21. 21. References <ul><li>[1] R.Handel,M.N.Huber,S.Schroder:ATM Networks-concepts, protocols and applications 7e. Pearson Education Ltd; India(2004) ‏ </li></ul><ul><li>[2] D.Raychaudhuri: Wireless ATM Networks-Architecture, System Design and Prototyping. IEEE PerSonal Communications.3(4),42-49(1996) ‏ </li></ul><ul><li>[3] B.Kraimeche:Wireless ATM-Current Standards and Issues. IEEE Wireless Communications and Networking Conference.1,56-60(1999) ‏ </li></ul><ul><li>[4] D.Raychaudhuri,N.D.Wilson:ATM-Based TransportArchitecture for Multiservices WirelessPerSonal Communication Networks. IEEE Journal On Selected Areas in Communications.12(8),1401-1414(1992) ‏ </li></ul><ul><li>[5] T.Nadeem,R.Miller:SurveyonWirelessandMobileATMNetworks. WirelessandATMNetworks.(2002) ‏ </li></ul><ul><li>[6] E.Ayanoglu,K.Y.Eng,M.J.Karol:WirelessATM-Limits,ChallengesandProposals.IEEE Personal Communications.3(4),18-34(1996) ‏ </li></ul>
  22. 22. Reference Contd… <ul><li>[7]Hakan Mitts: Architectures for wireless ATM. Helsinki University of Technology . (June1996).http://lib.tkk.?/HUTpubl/publications/mitts96.html. </li></ul><ul><li>[8] XinriCong:Wireless ATM-An Overview. Ohiostate .(Aug.1997) ‏ </li></ul><ul><li>˜jain/cis788-97/ftp/wire atm.pdf. </li></ul><ul><li>[9] D.Ray chaudhuri, N.Wilson: Multimedia Personal Communication Networks-System Design Issues. Proc. 3 rd WIWLAB Workshop on 3 rd Generation Wireless Information Networks.259-288(1992) ‏ </li></ul><ul><li>[10] Ayse Yasemin Sey dim:Wireless ATM (WATM) An Overview. Southern Methodist University, EE8304 Spring 2000, Section 799 . (2000)˜yasemin/watm.pdf. </li></ul><ul><li>[11]R.R.Bhatand K.Rauhala: Draft Baseline Text for Wireless ATM Capability Set1 Specification. BTD WATM-01, ATM Forum .(Dec.1998) ‏ </li></ul><ul><li>[12] L.Dellaverson: Reaching the New Frontier. The ATM Forum News Letter .4(3), (Oct.1996) . </li></ul>
  23. 23. Reference Contd… <ul><li>[13] Damian Gilmurray, AlanJones, Oliver Mason, John Naylon, John Porter: Wireless ATM Radio Access Layer Requirements. ATM Forum /96-1057/ WATM.(Aug.1996) ‏ </li></ul><ul><li>[14]C.Chrysostomou1,A.Pitsillides, F.Pavlidou: A Survey of Wireless ATM Handover Issues. Proc. Of the Int.Symposium of 3G Infrastructure and Services.2(3),34-39(2001) ‏ </li></ul><ul><li>[15] A.T.Campbell,K.Rauhala: Mobile ATM-State of the Art and Beyond. IEEE Networks.12(1),10-11 (1998) ‏ </li></ul><ul><li>[16] I.Akhyldiz: Mobility Management in Next generation Wireless System. Proceedings of the IEEE.87(8),1347-1384(1999) ‏ </li></ul><ul><li>[17] UpkarVarshney : Supporting Mobility with Wireless ATM. IEEE Computers Magazine.30(1),131-133(1997) ‏ </li></ul><ul><li>[18]A.Kaloxylos,G.Dravopoulos,H.Hansen: Mobility Management Extensions in the Wireless ATM Network Demonstrator. Proceedings of the ACTS-98 Summit, Rhodes,Greece.(1998) ‏ </li></ul>