Connection margin value of the terminal in a hierarchical conference

In the endpoint mixing scheme, the call control and media data between the terminal nodes are exchanged via the neighboring terminal nodes with hierarchical structure. In this paper, we show the formal method to calculate the maximum allowable number of neighboring terminal nodes in the hierarchical conference. This is derived by considering the computing resources and remaining power. We also define the connection margin value from the maximum allowable number of neighboring terminal nodes, and this value can be used efficiently in the environment to organize hierarchical conference.