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1. 发明申请

WO1992022969A1 DUAL BUS COMMUNICATION SYSTEM 审中-公开
标题翻译：双总线通信系统
公开(公告)号：WO1992022969A1
公开(公告)日：1992-12-23
申请号：PCT/GB1992000987
申请日：1992-06-01
申请人： HEWLETT PACKARD COMPANY , WATSON, Gregory, Charles, Adam
发明人： HEWLETT PACKARD COMPANY
IPC分类号： H04L12/40
CPC分类号： H04L12/407
摘要： A communications system has a plurality of stations (S1, S2...Sn) interconnected by a pair of uni-directional, oppositely-directed signal paths (A, B). For transmitting data down one path (A), frames are passed down the path (A) and each station (S1, S2...Sn) can write a packet of data to any frame which is empty. The stations (S1, S2...Sn) are arranged to operate in cycles in each of which a station can transmit up to a given number of packets. The stations (S1, S2...Sn) are operative to cause the frames to present a reset-request indication when all stations so far passed have completed packet writing in their current cycles. When a tail station (Sn) receives this indication, it knows all stations have finished their cycles and it transmits a reset signal on the other path (B) to initiate new station cycle. In order to increase the overall efficiency of the system in cases where only a single station wishes to transmit, each station is arranged to propagate a reset-request indication when starting a new cycle as well as upon cycle completion and to remember if any resets are received during the packet writing phase of its cycle.

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