Patent ID: 6166727
Filing Date: 2000-12-26
Classification: H04L

Abstract:
A virtual three dimensional space sharing system operating in a wide-area network environment having both a wide-band/high-speed network provided with at least one user terminal device and a narrow-band/low-speed network provided with at least one user terminal device, for sharing a virtual three dimensional space including at least one type of media among the at least one user terminal device, the system comprising:a multicast message transmitting unit and a multicast message receiving unit for performing multicast communication with the wide-band/high-speed network;a unicast message transmitting unit and a unicast message receiving unit for performing unicast communication with the narrow-band/low-speed network;a multicast group managing unit, a unicast message generating unit and a multicast message generating unit, for coordinating the multicast communication and the unicast communication; anda message thinning/re-assembling unit for reducing the communication traffic in the narrow-band/low-speed network.