With the convergence of IP based multimedia and communications, multipoint multimedia conferencing is becoming an important form of communication. There are two major problems that have plagued multimedia conferencing. The first is a form of control needed over the conference to maintain order and data integrity. The second is to optimise the bandwidth requirement as network bandwidth generally increase proportionally to the number of participants within the conference. Both the above problems place a serious limitation on the number of conference participants. The control criteria proposed...