Abstract: Floor control is a means to manage joint or exclusive access to shared resources in a synchronous groupware. Floor control in CSCW (Computer Supported Cooperative Work) is a metaphor for `assigning the floor to a speaker`, which is applicable to any kind of sharable resources within conferencing and cooperation environments. This study discusses an extension of a floor control protocol for internet synchronous groupware. We purpose how to extend RFC4376. Extension concerns two levels: Distribution and the organization of Floor control servers, for the same cooperative session and separation betweenfloor control policy and floor control protocol. Floor control servers mediate the access to shared remote resources in a synchronous cooperative session. Floor control servers, for the same cooperative session, are distributed and organized in a logical tree. Also they are used for routing floor control messages and for storing the floor participant requests.