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