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17 20051010 william

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17 20051010 william

  1. 1. Challenges in the Migration to 4G Mobile Systems Suk Yu Hui and Kai Hau Yeung City university of Hong Kong Presenter: Shuai Peng (William@camus.snu.ac.kr)
  2. 2. Contents <ul><li>Introduction </li></ul><ul><li>Overview of the Challenges </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>Conclusion </li></ul>
  3. 3. Introduction <ul><li>2G – 2 nd Generation Mobile System </li></ul><ul><ul><li>GSM, IS-95, cdmaOne </li></ul></ul><ul><ul><li>Low-bit-rate data </li></ul></ul><ul><li>3G – 3 rd Generation Mobile System </li></ul><ul><ul><li>Higher-data-rate service </li></ul></ul><ul><ul><li>New technology </li></ul></ul><ul><ul><ul><li>GPRS </li></ul></ul></ul><ul><ul><ul><li>IMT-2000 </li></ul></ul></ul><ul><ul><ul><li>Bluetooth </li></ul></ul></ul><ul><ul><ul><li>WLAN </li></ul></ul></ul><ul><ul><ul><li>HiperLAN </li></ul></ul></ul><ul><ul><li>Independent systems, all have there own shortcomings </li></ul></ul><ul><ul><li>A single system is needed to replace all of them – 4G </li></ul></ul>
  4. 4. Introduction <ul><li>4G – 4 th Generation Mobile System </li></ul><ul><ul><li>Key Features from Users’ Point of View </li></ul></ul><ul><ul><ul><li>High usability: anytime, anywhere, and with any technology </li></ul></ul></ul><ul><ul><ul><li>Support for multimedia services at low transmission cost </li></ul></ul></ul><ul><ul><ul><li>Personalization </li></ul></ul></ul><ul><ul><ul><li>Integrated services </li></ul></ul></ul><ul><ul><li>All-IP based network – any system / any time / any where </li></ul></ul><ul><ul><li>Telecommunications services + data and multimedia services </li></ul></ul><ul><ul><li>Personalized service </li></ul></ul><ul><ul><li>Facilities for integrated services </li></ul></ul><ul><li>Challenge to Migrate to 4G </li></ul><ul><ul><li>Mobile station </li></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><li>Service </li></ul></ul>
  5. 5. Contents <ul><li>Introduction </li></ul><ul><li>Overview of the Challenges </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>Conclusion </li></ul>
  6. 6. Overview of the Challenges <ul><li>Mobile Station </li></ul><ul><ul><li>Multimode User Terminals </li></ul></ul><ul><ul><li>Wireless System Discovery </li></ul></ul><ul><ul><li>Wireless System Selection </li></ul></ul>
  7. 7. Overview of the Challenges <ul><li>System </li></ul><ul><ul><li>Terminal Mobility </li></ul></ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul><ul><ul><li>Security </li></ul></ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul>
  8. 8. Overview of the Challenges <ul><li>Service </li></ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul><ul><ul><li>Personal Mobility </li></ul></ul>
  9. 9. Contents <ul><li>Introduction </li></ul><ul><li>Overview of the Challenges </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>Conclusion </li></ul>
  10. 10. Research Challenges – Mobile Station <ul><li>Multimode User Terminals </li></ul><ul><ul><li>Needs: terminals can adapt themselves for different wireless networks </li></ul></ul><ul><ul><li>Ideal solution: adopt the software radio approach </li></ul></ul><ul><ul><li>Challenge – current technology is not completely feasibility </li></ul></ul><ul><ul><ul><li>One antenna and one LNA cannot serve the wide range of frequency bands </li></ul></ul></ul><ul><ul><ul><ul><li>Need multiple analog parts </li></ul></ul></ul></ul><ul><ul><ul><li>Existing ADCs are not fast enough </li></ul></ul></ul><ul><ul><ul><ul><li>The fastest current ADC is still 2 to 3 orders slower </li></ul></ul></ul></ul><ul><ul><ul><li>Needs more interface functions for real-time execution </li></ul></ul></ul><ul><ul><ul><ul><li>More functions cause high circuit complexity, high power consumption and dissipation </li></ul></ul></ul></ul>
  11. 11. Research Challenges – Mobile Station <ul><li>Wireless System Discovery </li></ul><ul><ul><li>GSM – periodically broadcast </li></ul></ul><ul><ul><li>4G – more complicated because of </li></ul></ul><ul><ul><li>difference in network and protocols </li></ul></ul><ul><li>Solution and Challenge </li></ul><ul><ul><li>Scanning by software radio </li></ul></ul><ul><ul><li>Load required software for network </li></ul></ul><ul><ul><li>OTA (Over The Air) </li></ul></ul><ul><ul><ul><li>Free users from download </li></ul></ul></ul><ul><ul><ul><li>Simplify network Management </li></ul></ul></ul><ul><ul><ul><li>Long downloading time </li></ul></ul></ul><ul><ul><ul><li>Slow downloading speed </li></ul></ul></ul>
  12. 12. Research Challenges – Mobile Station <ul><li>Wireless System Selection </li></ul><ul><ul><li>Needs </li></ul></ul><ul><ul><ul><li>Select the optima network for the service needed </li></ul></ul></ul><ul><ul><ul><li>Right network ensure QoS (Quality of Service) </li></ul></ul></ul><ul><ul><li>Challenge </li></ul></ul><ul><ul><ul><li>Network change from time to time – complicated to select </li></ul></ul></ul><ul><ul><ul><li>Adequate knowledge of networks is required to make the selection </li></ul></ul></ul><ul><ul><ul><ul><li>Precise understanding of supported service </li></ul></ul></ul></ul><ul><ul><ul><ul><li>System data rates </li></ul></ul></ul></ul><ul><ul><ul><ul><li>QoS requirements </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Communication costs </li></ul></ul></ul></ul><ul><ul><ul><ul><li>User preference </li></ul></ul></ul></ul>
  13. 13. Contents <ul><li>Introduction </li></ul><ul><li>Overview of the Challenges </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>Conclusion </li></ul>
  14. 14. Research Challenges – System <ul><li>Terminal Mobility </li></ul><ul><ul><li>Allows user to roam across networks </li></ul></ul><ul><ul><li>Solutions and Challenges </li></ul></ul><ul><ul><ul><li>Location management </li></ul></ul></ul><ul><ul><ul><ul><li>Information about the roaming terminal </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Original and current located cells </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Authentication information </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>QoS capabilities </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Handoff management </li></ul></ul></ul><ul><ul><ul><ul><li>System load, handover latency, package losses </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Horizontal and Vertical handoff </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Rea-time multimedia service </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>No latency! </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><li>Correct handoff time </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Uncertain handoff times </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Hard to design good handoff </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>mechanisms </li></ul></ul></ul></ul></ul>
  15. 15. Research Challenges – System <ul><li>Network Infrastructure and QoS Support </li></ul><ul><ul><li>Background </li></ul></ul><ul><ul><ul><li>Non-IP-based system – Voice delivery </li></ul></ul></ul><ul><ul><ul><ul><li>GSM, CDMA2000, UMTS </li></ul></ul></ul></ul><ul><ul><ul><li>IP-based system – Data service </li></ul></ul></ul><ul><ul><ul><ul><li>802.11, WLAN, HiperLAN </li></ul></ul></ul></ul><ul><ul><li>For 4G – Integrating </li></ul></ul><ul><ul><ul><li>How to integrate? </li></ul></ul></ul><ul><ul><ul><li>How to ensure QoS? </li></ul></ul></ul><ul><ul><ul><ul><li>More and more systems are involved </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Hard to guarantee end-to-end QoS </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>From provider to user </li></ul></ul></ul></ul></ul>
  16. 16. Research Challenges – System <ul><li>Security and Privacy </li></ul><ul><ul><li>Background </li></ul></ul><ul><ul><ul><li>2G / 3G: different standards implemented for their unique feature </li></ul></ul></ul><ul><ul><ul><li>Existing security schemes are inadequate for 4G </li></ul></ul></ul><ul><ul><li>Challenge </li></ul></ul><ul><ul><ul><li>Key concern for 4G – Flexibility </li></ul></ul></ul><ul><ul><ul><li>Should be applied to different technologies and devices </li></ul></ul></ul><ul><ul><ul><ul><li>Varied capabilities </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Varied processing powers </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Varied security needs </li></ul></ul></ul></ul><ul><li>Fault Tolerance and Surivivability </li></ul><ul><ul><li>One network fails, many other networks afffected </li></ul></ul>
  17. 17. Contents <ul><li>Introduction </li></ul><ul><li>Overview of the Challenges </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>Conclusion </li></ul>
  18. 18. Research Challenges – Service <ul><li>Multi-operators and Billing System </li></ul><ul><ul><li>Background </li></ul></ul><ul><ul><ul><li>Today’s system – a flat rate based billing system </li></ul></ul></ul><ul><ul><ul><li>4G – more comprehensive billing and accounting system </li></ul></ul></ul><ul><ul><li>Challenge </li></ul></ul><ul><ul><ul><li>User subscribe to many services from many providers at same time </li></ul></ul></ul><ul><ul><ul><li>New business architecture, accounting process and data maintenance </li></ul></ul></ul><ul><ul><ul><li>Equalization on different charging schemes </li></ul></ul></ul><ul><ul><li>One Single Billing Method Covers All </li></ul></ul>
  19. 19. Research Challenges – Service <ul><li>Personal Mobility </li></ul>
  20. 20. Conclusion <ul><li>Introduction for 2G / 3G / 4G System </li></ul><ul><li>Research Challenges </li></ul><ul><ul><li>Mobile Station </li></ul></ul><ul><ul><ul><li>Multimode User Terminals </li></ul></ul></ul><ul><ul><ul><li>Wireless System Discovery </li></ul></ul></ul><ul><ul><ul><li>Wireless System Selection </li></ul></ul></ul><ul><ul><li>System </li></ul></ul><ul><ul><ul><li>Terminal Mobility </li></ul></ul></ul><ul><ul><ul><li>Network Infrastructure and QoS Support </li></ul></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Fault Tolerance and Survivability </li></ul></ul></ul><ul><ul><li>Service </li></ul></ul><ul><ul><ul><li>Multi-operators and Billing System </li></ul></ul></ul><ul><ul><ul><li>Personal Mobility </li></ul></ul></ul><ul><li>In My Point of View </li></ul><ul><ul><li>Listed Framework for 4G System, Challenges and Possible Solutions </li></ul></ul><ul><ul><li>Further Research Needed into Specified Domain </li></ul></ul>

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