Compact PCI backplane and method of data transfer across the compact PCI backplane
View Patent ↗A method of directly transferring data across a CompactPCI™ backplane ( 170 ) via a fully meshed orthogonal network ( 370 ). The CompactPCI backplane ( 170 ) incorporates a different type connector at its P 4 location, in conjunction with a standard family of IEC 61074 connectors at its P 1, P 2, P 3, and P 5 locations, to provide high speed data transfer with additional shielding and noise control.
1. A Compact peripheral component interconnect (CompactPCI) backplane comprising:
a plurality of CompactPCI connectors;
a plurality of channels in each CompactPCI connector of a portion of said plurality of CompactPCI connectors;
wherein:
said pluralities of channels are interconnected to form an orthogonal network;
a plurality of first CompactPCI connectors;
a plurality of second CompactPCI connectors adjacent to said plurality of first CompactPCI connectors;
a plurality of third CompactPCI connectors adjacent to said plurality of CompactPCI connectors;
a plurality of fifth CompactPCI connectors adjacent to said plurality of CompactPCI connectors; and
N board receivers;
wherein:
said plurality of CompactPCI connectors are a plurality of fourth CompactPCI connectors;
N is an integer greater than two;
a first one of said N board receivers is comprised of a first one of said plurality of first CompactPCI connectors, a first one of said plurality of second CompactPCI connectors, a first one of said plurality of third CompactPCI connectors, a first one of said portion of said plurality of CompactPCI connectors, and a first one of said plurality of fifth CompactPCI connectors;
a second one of said N board receivers adjacent to said first one of said N board receivers is comprised of a second one of said plurality of first CompactPCI connectors, a second one of said plurality of second CompactPCI connectors, a second one of said plurality of third CompactPCI connectors, a second one of said portion of said plurality of CompactPCI connectors, and a second one of said plurality of fifth CompactPCI connectors; and
a third one of said N board receivers adjacent to said second one of said N board receivers is comprised of a third one of said plurality of first CompactPCI connectors, a third one of said plurality of second CompactPCI connectors, a third one of said plurality of third CompactPCI connectors, a third one of said portion of said plurality of CompactPCI connectors, and a third one of said plurality of fifth CompactPCI connectors.
2. The CompactPCI backplane of claim 1 wherein:
said pluralities of first, second, third, and fifth CompactPCI connectors are CompactPCI connectors in a first family; and
said portion of said plurality of CompactPCI connectors are comprised of N CompactPCI connectors in a second family different from said first family.
3. The CompactPCI backplane of claim 1 wherein:
said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors are comprised of N channels; and
said N channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors in said N board receivers form said orthogonal network.
4. The CompactPCI backplane of claim 1 wherein:
said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors are comprised of M channels;
M is an integer greater than N; and
said M channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors in said N board receivers form said orthogonal network.
5. The CompactPCI backplane of claim 1 comprising:
a pair of transmit lines in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors;
a pair of receive lines adjacent to said pair of transmit lines in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors;
ground lines adjacent to said transmit and receive lines in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors;
wherein:
said ground lines of a first one of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors and said ground lines of a second one of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors form an electrical shield around said pairs of transmit and receive lines in said first one of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors; and
said first and second ones of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors are adjacent to each other.
6. The CompactPCI backplane of claim 1 wherein said orthogonal network comprises:
a first one of said plurality of channels in said first one of said N board receivers is coupled to itself;
a first one of said plurality of channels in said second one of said N board receivers is coupled to a second one of said plurality of channels in said first one of said N board receivers; and
a first one of said plurality of channels in said third one of said N board receivers is coupled to a third one of said plurality of channels in said first one of said N board receivers.
7. The CompactPCI backplane of claim 1 comprising:
a transmit portion and a receive portion in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors.
8. The CompactPCI backplane of claim 2 comprising:
a CompactPCI board inserted into said first one of said N board receivers;
wherein:
said CompactPCI board has a first mating portion for said first one of said plurality of first CompactPCI connectors, a second mating portion for said first one of said plurality of second CompactPCI connectors, a third mating portion for said first one of said third CompactPCI connectors, and a mating portion of said first one of said plurality of fifth CompactPCI connectors; and
said CompactPCI board is devoid of a mating portion for said first one of said portion of said plurality of CompactPCI connectors.
9. The CompactPCI backplane of claim 2 comprising:
a CPU receiver to receive a central processing unit (CPU) board;
wherein:
said CPU receiver is adjacent to said first one of said N board receivers;
said CPU receiver is comprised of an (N+1)th one of said plurality of first CompactPCI connectors, an (N+1)th one of said plurality of second CompactPCI connectors, an (N+1)th one of said plurality of third CompactPCI connectors, an (N+1)th one of said plurality of CompactPCI connectors, and an (N+1)th one of said plurality of fifth CompactPCI connectors;
said (N+1)th one of said plurality of CompactPCI connectors is a CompactPCI connector of said first family; and
said (N+1)th one of said plurality of CompactPCI connectors is absent from said portion of said plurality of CompactPCI connectors.
10. The CompactPCI backplane of claim 5 comprising:
additional ground lines in each CompactPCI connector of said portion of said plurality of CompactPCI connectors forming a shield row adjacent to said first one of said plurality of channels in each CompactPCI connector of said portion of said plurality CompactPCI connectors to provide protection for said pairs of transmit and receive lines in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors from interference and noise for high density data transport; and
further ground lines in each CompactPCI connector of said portion of said plurality of CompactPCI connectors forming a shield row adjacent to an Nth one of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors to provide protection for said pairs of transmit and receive lines in each of said plurality of channels in each CompactPCI connector of said portion of said plurality of CompactPCI connectors from interference and noise for high density data transport.
11. The CompactPCI backplane of claim 6 wherein said orthogonal network comprises:
a second one of said plurality of channels in said second one of said N board receivers is coupled to itself; and
a second one of said plurality of channels in said third one of said N board receivers is coupled to a third one of said plurality of channels in said second one of said N board receivers.
12. The CompactPCI backplane of claim 7 wherein said orthogonal network comprises:
said transmit portion of a first one of said plurality of channels in said first one of said N board receivers is coupled to said receive portion of said first one of said plurality of channels in said first one of said N board receivers;
said transmit portion of a first one of said plurality of channels in said second one of said N board receivers is coupled to said receive portion of a second one of said plurality of channels in said first one of said N board receivers; and
said transmit portion of a first one of said plurality of channels in said third one of said N board receivers is coupled to said receive portion of a third one of said plurality of channels in said first one of said N board receivers.
13. The CompactPCI backplane of claim 11 wherein said orthogonal network comprises:
a third one of said plurality of channels in said third one of said N board receivers is coupled to itself.
14. The CompactPCI backplane of claim 12 wherein said orthogonal network comprises:
said transmit portion of a second one of said plurality of channels in said second one of said N board receivers is coupled to said receive portion of said second one of said plurality of channels in said second one of said N board receivers; and
said transmit portion of a second one of said plurality of channels in said third one of said N board receivers is coupled to said receive portion of a third one of said plurality of channels in said second one of said N board receivers.
15. The CompactPCI backplane of claim 14 wherein:
said transmit portion of a third one of said plurality of channels in said third one of said N board receivers is coupled to said receive portion of said third one of said plurality of channels in said third one of said N board receivers.