A proposal for gps-less location detection using a reference direction information sharing method with co-operation of mobile terminals

ABSTRACT

This paper describes a proposal for wireless communication system and mobile terminals, especially useful for location based service without using GPS receiver in the service area. The Global Positioning System (GPS) or gyroscope sensor (gyrocompass) terminals are known as a technology to provide location information. However, GPS may not provide enough accuracy in a building, an underground complex or downtown area among high buildings. In this proposed wireless communication system, mobile terminals can obtain reference direction information and share the reference direction information at same time. This is achieved by having mobile terminals sharing signals received from reference stations installed in the service area to other mobile terminals. The proposed wireless communication system can be expected to provide advanced service using location/direction information.

REFERENCES

• 1: P. K. Enge, R. M. Kalafus, and M. F. Ruane. Differential operation of the global positioning system. Communications Magazine, IEEE, 26(7):48--60, July 1988.
• 2: K. Kobayashi, K. C. Cheok, K. Watanabe, and F. Munekata. Accurate differential global positioning system via fuzzy logic kalman filter sensor fusion technique. Industrial Electronics, IEEE Transactions on, 45(3):510--518, June 1998.
• 3: B. W. Parkinson and S. W. Gilbert. Navstar: Global positioning system-ten years later. Proceedings of the IEEE, 71(10):1177--1186, Oct. 1983.

INDEX TERMS

Primary Classification:
  J. Computer Applications
  J.2 PHYSICAL SCIENCES AND ENGINEERING
      Subjects: Electronics

Additional Classification:
  B. Hardware
  B.8 Performance and Reliability
      B.8.m Miscellaneous

  C. Computer Systems Organization
  C.3 SPECIAL-PURPOSE AND APPLICATION-BASED SYSTEMS
      Subjects: Signal processing systems

General Terms:
Performance

Keywords:
ad-hoc network, cellular system, direction detection, directivity, gps-less, information sharing, location based service, mobile terminal, positioning, wireless communication system