Ying-Dar Lin
Far EasTone Telecommunications Company
Mobile IP, GSM, GPRS, Roaming, Vertical Handoff, Location Tracking
Mobile IP allows terminal stations to move only within the coverage of Internet,
beyond which such access service cannot be provided. On the other hand, GSM GPRS
may have wider coverage for mobile service. Sources within GSM GPRS are able to
keep track of and access destinations within GPRS as well as Internet. But it is
not true for the opposite direction. Sources within Internet cannot access
destinations that roam into GSM GPRS. That is, present GPRS and Internet cannot
provide bi-directional location tracking.
To overcome problems described above, this project aims to extend mobile IP coverage into GPRS by designing the bi-directional interoperation of mobile IP and GSM GPRS. Work flows and protocols of (1) roaming, (2) vertical handoff, (3) location tracking, (4) sending / receiving data between these two systems will be designed. The gateway integrating these two environments will be designed and prototyped. While several enhancements of the basic protocol will be engineered, a simulation model will be established to analyze the performance and workload of these protocol entities.