2003-9 第二代移动通信系统向第三代移动通信系统 演进 Background Lucent NetworkCare Professional Services (Lucent NPS) is a provider of communications consulting, intelligent maintenance, and management solutions for next generation networks Seminar objectives Describe the current state of wireless data networking Provide insight into the future direction for wireless data networking Provide specific techniques to aid in planning and implementing wireless data networks Market Drivers  An Industry in Change Transformation to Seamless Services Cellular/PCS Wireless Evolution Emerging Challenges for the Operator Maintaining profit margins Existing wireless operators have to look beyond traditional voice services in order to maintain and grow margins  Wireless Applications Vertical Business Mobile Office Personal Finance Entertainment Information & Travel Shopping Friends & Family Route Planning 3G Wireless Terminal Third Generation (ITU) Requirements Wireless Technologies Map Unlicensed Technologies Using ISM Point-to-Point Fixed Wireless Example The UMTS Vision Air Interface Evolution to 3G Air Interface Evolution (Based on GSM Infrastructure) 2G vs. 3G Wireless Migration Packet Network Roadmap IP is Evolving to Meet the Need IP Extensions to Support Cellular Attributes Passive Connectivity Mobility Management Handoff Mechanisms Quality of Service Billing Mechanisms Ubiquitous Scalability Lucent NPS Wireless Data Networking Professional Services Plan Business Consulting Vendor/Technology Selection  Design Network Design and Engineering Application Development (Functional Specification) Implement Wireless Master Integrator (Wireless Apps, DCN, IN, NMC) Wireless CyberCarrier Services (ASP Hosting Platforms) Operate Network Provisioning and Expansion Planning Network Optimization Systems Audits and Performance Evaluation Technical Organization Build/Knowledge Transfer 3G From a  North American Perspective Stuart Jeffery VP of Networks ComMagine Inc 1072 Seena Ave Los Altos, CA 94024 E-mail  stu@seena.net  Office +1 max.book118.com Mobile +1 max.book118.com Trends in Wireless  Outline US wireless history US versus European Markets Technology evolution Emerging services 3G wireless Unlicensed Wireless User Terminal Path to global interworking  BC (Before Cellular) Single Channel Radio Telephone High power transmitter on a high spot Each user has own channel range of 50 miles Trunked Radio “Trunking efficiency” by sharing channels More spectrum efficient Cellular like Trunked radio, share the channels Low power= small coverage area Low power = frequency reuse More expensive infrastructure   History (USA Part 1) History (USA Part 2) History (USA Part 3) Europe consolidated on GSM Meanwhile in ... Japan Similar to Europe multitude of standards NTT in 1979 JTACS in 1988 PDC in 1993 Pacific Digital Cellular - Challenge GSM in ASIA Narrow band digital, similar to NA-TDMA Packet data mode, similar CDPD  Reality -  PDC is very big in Japan, but no traction elsewhere But I mode is extremely popular and low data rate DoCoMo - got it right and the rest of

3G系统演进.ppt