| Popis: |
This paper presents a new loop structure and its associated protocol for a mini-micro computer communication network. The proposed structure consists of two loops, both of which are used for control and data transmission one in the clockwise direction and the other in the counter-clockwise direction. This topology has all the advantages of ring structures such as simplicity, cost modularity, space modularity, concurrent service and high reliability. In addition, it provides better line utilization and traffic regulation than previously proposed loops because a) it has a distributed control mechanism and b) it allows two stations to communicate for long periods of time without blocking completely communication between other stations. Furthermore, it allows limited communication in case that a break occurs in the line. The loop protocol is based on the SDLC frame format. This has made possible the use of the latest LSI technology that disasembles and reassembles the character of this frame. |
