Patent US5920698A successfully refreshed from Google Patents.
US5920698A
Expired / Lapsed
US
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Automatic detection of a similar device at the other end of a wire in a computer network
Assignee: HTC Corp
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Filing: 1997-01-06
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Granted: 1999-07-06
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Expires: 2017-01-06
Abstract
Abstract Automatic detection by a port of the type of device connected by a cable to the port is accomplished by transmitting a control packet by the device, where the control packet has a nonstandard format. The port examines received packets for the nonstandard format. Upon detection of a packet having the nonstandard format, the port recognizes that the source device of the packet is of a predetermined type which transmits control packets of the nonstandard format. Further, by choosing the nonstandard format so that typical forwarding devices will not forward the nonstandard packet, the port is assured that the source device is attached to the port by a cable. That is, by choosing a nonstandard packet which is not forwarded by a bridge or router, the port is assured that the packet has not been forwarded from a remote part of the network.
Inventors
- 👤 Simoni Ben-Michael
- 👤 Shuki Perlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:43
CPC Classifications
H; H04; H04L; H04L49/00; H04L49/35; H04L49/351; H04L9/00; H04L9/40; H04L49/20; H04L49/201; H04L49/50; H04L49/505; H04L49/506; H04L69/00; H04L69/18
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
A repeater, comprising: a receiver for receiving a nonstandard control packet having a nonstandard introductory bit sequence pattern to render said control packet rejectable by a standard packet forwarding device; a determination mechanism, responsive to receipt of said transmitted nonstandard control packet, for determining that said transmitted nonstandard control packet came from a device capable of handling said nonstandard control packet; and, an initiator, responsive to receipt of said transmitted nonstandard control packet, for initiating a desired action, said desired action comprising one of the following actions: establishing credit based flow control between the repeater and the device capable of handling said non-standard control packet, and establishing full duplex communication between the repeater and the device capable of handling said non-standard control packet.
Claim 2
Dependent Claim
123 words
A repeater, comprising: a receiver for receiving a nonstandard control packet having a nonstandard introductory bit sequence pattern to render said control packet rejectable by a standard packet forwarding device; a determination mechanism, responsive to receipt of said transmitted nonstandard control packet, for determining that said transmitted nonstandard control packet came from a device capable of handling said nonstandard control packet; and, an initiator, responsive to receipt of said transmitted nonstandard control packet, for initiating a desired action, said desired action comprising one of the following actions: establishing credit based flow control between the repeater and the device capable of handling said non-standard control packet, and establishing full duplex communication between the repeater and the device capable of handling said non-standard control packet.
Claim 3
Dependent Claim
29 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: seven (7) bytes of the pattern 10101010 followed by one byte of the pattern 10101000.
Claim 4
Dependent Claim
29 words
The repeater as in claim 1, wherein a standard introductory bit sequence pattern comprises: seven (7) bytes of the pattern 10101010 followed by one byte of the pattern 10101011.
Claim 5
Dependent Claim
29 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: seven (7) bytes of the pattern 10101010 followed by one byte of the pattern 00101010.
Claim 6
Dependent Claim
29 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: seven (7) bytes of the pattern 10101010 followed by one byte of the pattern 10001010.
Claim 7
Dependent Claim
37 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: six (6) bytes of the pattern 10101010 followed by one byte of the pattern 10100010, followed by one byte of the pattern 10101000.
Claim 8
Dependent Claim
34 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: six (6) bytes of the pattern 10101010 followed by one byte of the pattern 10100010, followed by the pattern 10101000.
Claim 9
Dependent Claim
37 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: six (6) bytes of the pattern 10101010 and one byte of the pattern 10100010 in a predetermined order, followed by the pattern 10101011.
Claim 10
Dependent Claim
37 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: six (6) bytes of the pattern 10101010 and one byte of the pattern 10100010 in a predetermined order, followed by the pattern 10101000.
Claim 11
Dependent Claim
31 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: a predetermined number of bytes of the pattern 10101010 and no byte having the bit pattern 11.
Claim 12
Dependent Claim
40 words
The repeater as in claim 1, wherein said nonstandard introductory bit sequence pattern comprises: a predetermined number of bytes of the pattern 10101010, a predetermined number of bytes having a different bit pattern, and no byte having the pattern 11.
Claim 13
Dependent Claim
25 words
The repeater as in claim 1, wherein said desired action comprises: establishing full duplex communication between a first buffered repeater and a second buffered repeater.
Claim 14
Dependent Claim
25 words
The repeater in claim 1, wherein said desired action comprises: establishing credit based flow control between a first buffered repeater and a second buffered repeater.
Claim 15
Dependent Claim
56 words
The repeater as in claim 1, wherein said non-standard control packet has a minimum packet size so that, in event that a SFZ pattern occurs in a data field of said control packet, any such packet forwarded by a standard forwarding device becomes a runt packet, and said runt packet is rejected by a receiving apparatus.
Claim 16
Independent Claim
119 words
A method of operating a repeater, comprising: receiving a nonstandard control packet having a nonstandard introductory bit sequence pattern to render said control packet rejectable by a standard packet forwarding device; determining, in response to receipt of said transmitted nonstandard control packet, that said transmitted nonstandard control packet came from a device capable of handling said nonstandard control packet; and initiating a desired action in response to receipt of said transmitted nonstandard control packet, said desired action comprising one of the following actions: establishing credit based flow control between the repeater and the device capable of handling, said non-standard control packet, and establishing full duplex communication between the repeater and the device capable of handling said non-standard control packet.
Claim 17
Independent Claim
119 words
A method of operating a repeater, comprising: receiving a nonstandard control packet having a nonstandard introductory bit sequence pattern to render said control packet rejectable by a standard packet forwarding device; determining, in response to receipt of said transmitted nonstandard control packet, that said transmitted nonstandard control packet came from a device capable of handling said nonstandard control packet; and initiating a desired action in response to receipt of said transmitted nonstandard control packet, said desired action comprising one of the following actions: establishing credit based flow control between the repeater and the device capable of handling, said non-standard control packet, and establishing full duplex communication between the repeater and the device capable of handling said non-standard control packet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-07-05 | 2003-01-04 | 2003-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-05 | 2007-01-04 | 2007-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-05 | 2011-01-04 | 2011-07-06 | $7700.00 | Window Closed / Lapsed |