US4814762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delta network control of a cross-point switch
Assignee: Cisco Technology Inc
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Filing: 1987-11-25
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Granted: 1989-03-21
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Expires: 2007-11-25
Abstract
Abstract A switching system comprising a cross-point switch and a Delta network. The two switches are connected in parallel with common port adaptors. When a port desires a specified time reservation to another port, it sends a request message for the specified time over the Delta network to the requested adaptor at which a reservation processor grants a connection for completion at a fixed time in the future. The reservation grant is then returned via the Delta network to the requesting adaptor which, at the fixed time, sets the cross-point connection on the cross-point switch line associated with the requesting adaptor.
Inventors
- 👤 Peter A. Franaszek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/64; H04Q3/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A method for transmitting data between source adaptors and destination adaptors via a cross-point array, comprising the steps of: transmitting data from at least one of said source adaptors to a corresponding designated destination adaptor over said cross-point array; transmitting a connection request from each of said source adaptors having a connection request over a Delta network, said Delta network having a guaranteed path for said connection request; resolving any contentions between connection requests in said Delta network such that each said connection request will reach the intended destination adaptor; wherein said step of resolving any contentions comprises combining connection requests from two different source adaptors for the same destination adaptor into a single message.
Claim 2
Independent Claim
115 words
A method for transmitting data between source adaptors and destination adaptors via a cross-point array, comprising the steps of: transmitting data from at least one of said source adaptors to a corresponding designated destination adaptor over said cross-point array; transmitting a connection request from each of said source adaptors having a connection request over a Delta network, said Delta network having a guaranteed path for said connection request; resolving any contentions between connection requests in said Delta network such that each said connection request will reach the intended destination adaptor; wherein said step of resolving any contentions comprises combining connection requests from two different source adaptors for the same destination adaptor into a single message.
Claim 3
Dependent Claim
113 words
The method for transmitting data of claim 1, wherein said step of combining connection requests comprises the steps of: receiving and storing at least two reservation requests, each of said reservation requests including an address of a destination adaptor, a requested time of service, and a control message; comparing the destination adaptor addresses of each of said reservation request; for at least some of said reservation requests having the same destination address, combining said reservation requests into a single reservation request including the control messages of the reservation requests being combined and a requested time of service equal to the sum of the times of service of the two reservation requests being combined.
Claim 4
Dependent Claim
23 words
The method for transmitting data of claim 2, further comprising the step of exempting an oldest reservation request from said step of combining.
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |