Multiplex communications – Wide area network – Packet switching
Patent
1994-10-27
1996-03-26
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 61, 359117, 395250, H04J 1300
Patent
active
055027199
ABSTRACT:
A fiber optic switch interconnects ports (p1-pi) for connection with respective fiber optic channels so that a fiber optic network is realized. Channel modules provide the ports. Each channel module has a port intelligence mechanism for each port and a memory interface system for temporarily storing data passing to and from the ports. A switch module having a main distribution network, an intermix distribution network, and a control distribution network interconnects the memory interface systems and permits exchange of data among the ports and memory interface systems. A path allocation system controls the switch module and allocates the data paths therethrough. The path allocation system has a scheduler which maintains a destination queue (Q.sub.p1 -Q.sub.pi) for each of the ports. The destination queues are implemented with a double link list in a single memory configuration so that a separate queue structure in hardware is not necessary. Moreover, the scheduler is implemented with a digital signal processor (DSP) with on-chip memory so that the queues are implemented within the on-chip memory and can be accessed at high speed.
REFERENCES:
patent: 5136582 (1992-08-01), Firoozmand
patent: 5247626 (1993-09-01), Firoozmand
patent: 5313582 (1994-05-01), Hendel et al.
Book David
Grant Robert H.
Purohit Robin
Stoevhase Bent
Hewlett--Packard Company
Marcelo Melvin
Schuette Richard F.
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