System and method for achieving greater than 10 Gbit/s transmission rates for twisted pair physical layer devices
View Patent ↗A system and method for achieving greater than 10 Gbit/s transmission rates for twisted pair physical layer devices. An architecture is provided that enables transmission at the next standardized transmission rate over structured cabling.
1. A physical layer device for the transmission of data over a twisted pair copper cable, comprising:
a media access control layer interface that supports a first data transmission rate of 40 Gbit/s;
a first forward error correction coder that supports the generation of forward error correction code blocks for transmission at said first data transmission rate over said twisted pair copper cable;
a second forward error correction coder that supports the generation of forward error correction code blocks for transmission at a second data transmission rate of 10 Gbit/s over said twisted pair copper cable;
a medium interface that supports transmission over said twisted pair copper cable; and
an autonegotiation sub layer that is configured to facilitate a selection of a negotiated transmission rate from a set of transmission rates that includes said first data transmission rate, said second data transmission rate, and a third data transmission rate between said first data transmission rate and said second data transmission rate for a short reach mode of communication having a cable length limit that does not approach 100 meters, wherein said selection of said third data transmission rate is based on an analysis of discovered communication characteristics that enables identification of a type of twisted pair copper cable and a length of said twisted pair copper cable that is less than said cable length limit.
2. The physical layer device of claim 1 , wherein said media access control layer interface is defined by IEEE 802.3ba.
3. The physical layer device of claim 1 , wherein said forward error correction coder is a low density parity check coder.
4. The physical layer device of claim 1 , wherein said second forward error correction coder is a 10GBASE-T forward error correction coder.
5. The physical layer device of claim 1 , wherein said discovered communication characteristics are determined through testing of said twisted pair copper cable by said physical layer device.
6. The physical layer device of claim 1 , wherein said selection of said negotiated transmission rate uses unformatted next page messages.
7. The physical layer device of claim 1 , wherein said selection of said negotiated transmission rate uses physical signaling.
8. The physical layer device of claim 1 , wherein said selection of said negotiated transmission rate uses Layer 2 messaging.
9. A variable-rate physical layer device for the transmission of data over a twisted pair copper cable, comprising:
a media access control layer interface that supports a first data transmission rate of 40 Gbit/s;
a first forward error correction coder that supports the generation of forward error correction code blocks for transmission at said first data transmission rate over said twisted pair copper cable;
a second forward error correction coder that supports the generation of forward error correction code blocks for transmission at a second data transmission rate of 10 Gbit/s over said twisted pair copper cable;
a medium interface that supports transmission over said twisted pair copper cable; and
an autonegotiation sub layer that is configured to facilitate a selection of a negotiated transmission rate from a set of transmission rates that includes said first data transmission rate, said second data transmission rate, and a third data transmission rate between said first data transmission rate and said second data transmission rate, wherein said selection of said third data transmission rate is based on an analysis of discovered communication characteristics that enables identification of a type and/or length of twisted pair copper cable that is not suitable for transmission at said first data transmission rate.
10. The physical layer device of claim 9 , wherein said media access control layer interface is defined by IEEE 802.3ba.
11. The physical layer device of claim 9 , wherein said forward error correction coder is a low density parity check coder.
12. The physical layer device of claim 9 , wherein said second forward error correction coder is a 10GBASE-T forward error correction coder.
13. The physical layer device of claim 9 , wherein said selection of said negotiated transmission rate uses unformatted next page messages.
14. The physical layer device of claim 9 , wherein said selection of said negotiated transmission rate uses physical signaling.
15. The physical layer device of claim 9 , wherein said selection of said negotiated transmission rate uses Layer 2 messaging.