A computer network is configured to define and update a shared computer-generated environment. A serving computer divides a computer-generated environment into a plurality of cells. A plurality of user computer terminals have display devices, storage, processing capability and a connection to the network....http://www.google.fr/patents/US6801930?utm_source=gb-gplus-shareBrevet US6801930 - Method and apparatus for maintaining information about users sharing the cells partitioning a computer-generated environment
Method and apparatus for maintaining information about users sharing the ...