| 摘要 |
PURPOSE: A method of conference roster exchange in a multipoint conference control module is provided so that an unnecessary processing time and data can be decreased by transmitting information from a new lower node to an upper node. CONSTITUTION: A conference roster correction notifying PDU is transmitted from a new lower node(1101), and the received PDU is decoded(1102). A state of a selector of the PDU is detected(1103). When the selector indicates 'refresh', the procedure of T.124 is performed(1104). The corrected conference roster is converted into the conference roster correction notifying PDU(1105). Thereafter, the new conference roster correction notifying PDU is coded again(1106). The coded PDU is transmitted to an upper node(1107). On the other hand, when the selector indicates 'update', the coded PDU from the lower node is separately stored(1108). The conference roster is corrected according to a kind of the selector of a node correction record of an update-list in the decoded PDU(1109). When the selector indicates 'add', it implies that a new node takes part in the conference. Thus, node information of the node correction record is added to the conference roster(1110). When the selector indicates 'replace', it implies that node information of the specific node number is replaced by the contents of the PDU(1111). When the selector indicates 'remove', node information corresponding to a node number of the node correction record is deleted(1112). When correction of the conference roster is finished, the coded PDU is transmitted to the upper node as it is(1113).
|
