US5506989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arbitration system limiting high priority successive grants
Assignee: International Business Machines Corp
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Filing: 1990-01-31
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Granted: 1996-04-09
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Expires: 2010-01-31
Abstract
Abstract Priority levels and bump values are assigned to requestors for access to a system resource. When access requests are received, arbitration of the requests is made in accordance with the assigned priorities, bump values, and the received access requests. If a high priority level access request is granted, then the same request will be held off for a successive number of requests as set by the bump values. In cases where the access is required for more than one request/grant cycle, the priority level access can be retained as long as required.
Inventors
- 👤 Gerald D. Boldt
- 👤 Stephen D. Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:59
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/36; G06F13/362; G06F13/364
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
An access priority arbitration system comprising, in combination: means for assigning priority access levels; means for setting bump values; means for receiving a plurality of access requests; means responsive to assigned priority access levels, access requests, and bump values for arbitrating the access request; and means for controlling a mode of operation so that arbitration can be performed faster when a large number of access requests are anticipated.
Claim 2
Dependent Claim
68 words
An access priority arbitration system comprising, in combination: means for assigning priority access levels; means for setting bump values; means for receiving a plurality of access requests; means responsive to assigned priority access levels, access requests, and bump values for arbitrating the access request; and means for controlling a mode of operation so that arbitration can be performed faster when a large number of access requests are anticipated.
Claim 3
Dependent Claim
102 words
The combination comprising: a plurality of request lines for supplying request signals indicative of requests for access to resources; first means for assigning priority levels to each of said plurality of request lines; second means for assigning a bump value to each of said plurality of request lines; output means responsive to said first and second means and said request signals for supplying access grant signals to one of said plurality of request lines; mode means for setting a mode of operation; and means responsive to said mode means for causing said output to supply access grant signals at a different rate.
Claim 4
Dependent Claim
102 words
The combination comprising: a plurality of request lines for supplying request signals indicative of requests for access to resources; first means for assigning priority levels to each of said plurality of request lines; second means for assigning a bump value to each of said plurality of request lines; output means responsive to said first and second means and said request signals for supplying access grant signals to one of said plurality of request lines; mode means for setting a mode of operation; and means responsive to said mode means for causing said output to supply access grant signals at a different rate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-09 | 1999-10-09 | 2000-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-09 | 2003-10-09 | 2004-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-09 | 2007-10-09 | 2008-04-09 | $7700.00 | Window Closed / Lapsed |