Point-to-Multipoint Communication Protocol on Window-Based Network Presentation System (Special Issue on Educational System using Multimedia and Communication Technology)

概要

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In this paper, an efficient one-way point-to-multipoint communication protocol (PTMP) is proposed. The PTM protocol is helpful to distribute information to many work-stations simultaneously and correctly. The PTM protocol is designed for network channels with low error possibility. The PTM protocol utilizes broadcast for data distributing. Re-transmission request for lost packet is returned to the server, and acknowledgment for correctly received packets is not returned to the server. We have applied the protocol to the network presentation system. The network presentation system is intended to display same graphical images to multiple workstations simultaneously on an X window system. This presentation system is able to provide services for at least forty X servers simultaneously, the capacity is limited to X server performance, except for pixmap drawing. For the case of pixmap drawing, the system capacity is limited to the network bandwidth. To solve network bandwidth problem, we combined PTM protocol with the network presentation system. With PTM protocol, system performance is improved and the use of network bandwidth is lowered.
社団法人電子情報通信学会の論文
1997-02-25