Method and apparatus for interface dual modular redundancy
摘要
Controller triple modular redundancy is substantially achieved and reliability improved in a system having duplicate controllers that serve peripheral units. Both controllers detect suspected faults in itself and in the other controller. A peripheral unit that suspects a faulty active controller requests a switch of the active controller. A voting circuit processes votes from the controllers and the active controller switch signal from the peripheral units to select the active controller. The signaling paths between the controllers used to convey votes and active controller information are duplicated. The signals on these signaling paths convey information by using oscillating signals of different frequencies.
申请公布号
US6002970(A)
申请公布日期
1999.12.14
申请号
US19970950476
申请日期
1997.10.15
申请人
INTERNATIONAL BUSINESS MACHINES CORP.
发明人
ABDELNOUR, GEORGE MICHEL;BOND, ARTHUR LATIMER;DOWNES, ROBERT W.;POTTER, JR., KENNETH H.;YU, FREDERICK K.