The opportunity and challenge of communication and navigation fusion technology in intelligent medical service
of Posts &Telecommunications
Deng zhongliang, is a professor of Beijing University of Posts and Telecommunications. He has been on long-term scientific research and engineering practice on navigation and location services. He develops the indoor navigation system of China “Xihe plan”, and proposes multi-scale wireless network positioning navigation theory and method to promote wide area indoor and outdoor location services. He have finished 26 major national and key projects, He won China National Science and Technology Progress Award in the first place two times. There are 219 papers published. He also got the honors of China's top ten scientific and technological innovation figures and Guanghua Engineering Science and Technology Award.
There are 80% human-living time for indoor activities, such as public safety, emergency rescue, children nursing, IOT (Internet of Things) and national defense, which have a great demand on high-accuracy LBS (Location Based Services). Navigations seamless around indoor and outdoor, have been a national long-term development plan for navigations in China. However, satellites can’t provide with indoor positioning and navigations, because there is no signals coverage around or inside buildings. It takes great cost to build a specialized system only for indoor positioning and navigations. Wi-Fi and Bluetooth can achieve a relatively high accuracy, but limited coverages would be hard to wide-area applications and managements. Traditional mobile communications and broadcasting networks have a great advance for wide coverages and low cost, but complex buildings structures bring signals with multiple interferences, non-rectilinear propagations and serious multipath effects. Therefore, the accuracy for indoor positioning by using 2G / 3G / 4G networks are still more than 100 meters, which seriously degrade high-accuracy LBS developments. This report analyses and reviews the present researches worldwide, and technologies challenges for high-accuracy LBS. Moreover, we focus on series of key technologies for positioning seamless around indoor and outdoor with sub-meter accuracy, which are based on mobile communications networks. The theories and frameworks with navigations enhanced in common communications bands are proposed. We also introduce the great progresses of LBS big-data services and industrial applications in China “XiHe” plan. At last, fusing mobile communications networks, broadcasting networks, wireless networks and satellite networks, have achieved high accuracy and wide coverage. The involutions provide with a low cost, quick construction scheme for China LBS.