B3G technology research from the 20th century when performing standardized 3G technology began. In 2006, ITU - R formally named IMT - B3G technology called 3G technology on technology (IMT - 2000). According to the plan, the original IMT - the standardization has "on Sunday." ITU - R will in February 2008 to all countries, to send circulars and the standardization organization IMT - on the technical proposal solicitation. IMT - on the technology needed to achieve higher data rate and larger system capacity, target peak rate for: low-speed moving, hotspot coverage 1Gbit/s above scenarios; High-speed mobile, the wide-area 100Mbit/s covered more than scenarios.
International on the research on the IMT - have made a series of important progress. Japan NTTDoCoMo company already through 4 x 4 and 12 x 12 multi-antenna MIMO technology in verified under 100MHz bandwidth respectively 1Gbit/s (outdoor tests) and 5Gbit/s peak in hardware realization transmission rate, is a world leading position. The eu's second 6 framework research project WINNER since 2004, attracting Europe since the start of the main communication equipment business. The first stage (Phase Ⅰ) already in the end of 2005, various B3G key technologies used in the broad survey, formed systematic research conclusion; Will be completed by the end of 2007 the second stage (Phase Ⅱ) will complete the system design and performance evaluation, forming perfect technical solution; The third Phase began in 2008 will be conducted Ⅲ) Phase (demo system development and experiment. Meanwhile, the European Union support world BBS (the WWRF) wireless research B3G has become an international one of the main platform technical exchanges. In addition, Japan and South Korea also are respectively established NGMC BBS, mITF BBS and promote their B3G research.
Overall structure
With the rapid development of human society and the continuous progress, people more and more yearning use carry mobile anytime of each communication, so don't leave B3G communication system used in mobile cellular network, mobile communication research range should be expanded. Admittedly, mobile cellular network now free to people for the communication play the role of unprecedented, they continue to improve and develop is completely conform to social needs. But, except for mobile cellular nets, besides the wireless LAN WLAN, wireless intracity networks WMAN, wireless a domain nets WPAN, satellite communication network, digital radio network, stratosphere communications network, traditional cable connection nets, etc. These access network have distinguishing feature each, and best applicable environment, so B3G communication system should not be replaced by entirely different networks, and should have network through multiple access technology and standard fusion for the user to provide transparent and efficient services.
B3G expected future of mobile communication system will integrate the honeycomb, RLAN (Area), have a Local digital Radio, satellite and other access system, at the same time requirement for seamless interaction between these systems, and users can according to terminal performance, position and type of transmission mechanism provides enjoy variety of information. Different wireless access system will through the flexible core network interconnection, horizontal/vertical switch in mobility, service, safety and QoS aspects, after consultation service provide seamless by core network or access core network server provided. To realize such a seamless service, to develop highly adaptive, symmetry/unsymmetrical packet data transmission solutions.
No comments:
Post a Comment