EP0678997A1
Expired / Lapsed
EP
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Improvements in or relating to ATM communication systems
Assignee: Roke Manor Research Ltd
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Filing: 1995-03-20
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Granted: —
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Expires: 2015-03-20
Abstract
Abstract An ATM communication system having DBA, comprising storage means for DBA traffic, which storage means includes dedicated storage means for ABR traffic, the system being such that ABR bandwidth requests are allocated after all other DBA bandwidth allocations have been satisfied, means being provided for interrupting an ABR transmission, before a bandwidth allocation within which the said ABR transmission is included has been fully used, for the transmission of other higher priority DBA traffic.
Inventors
- 👤 Andrew Timothy Hayter
- 👤 Simon Paul Davis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:28
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L12/5602; H04L2012/5629; H04L2012/563; H04L2012/5631; H04L2012/5632; H04L2012/5635; H04L2012/5638; H04L2012/5646; H04L2012/5651
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
An ATM communication system having DBA, comprising storage means for DBA traffic, which storage means includes dedicated storage means for ABR traffic, the system being such that ABR bandwidth requests are allocated after all other DBA bandwidth allocations have been satisfied, means being provided for interrupting an ABR transmission, before a bandwidth allocation within which the said ABR transmission is included has been fully used, for the transmission of other higher priority DBA traffic.
Claim 2
Dependent Claim
93 words
An ATM communication system as claimed in Claim 1, comprising a plurality of statistical multiplexer units (SMU's) on an 'input side' of the switch and a plurality of SMU's on an 'output side' of the switch, the 'input side' SMU's comprising a plurality of stores, one for each 'output side' SMU, in which ATM cells for transmission across the switch are stored, each store on the 'input side' of the switch being operatively associated with a server, the servers being controlled in accordance with a DBA protocol by 'input side' resource allocation means.
Claim 3
Dependent Claim
41 words
An ATM communication system as claimed in Claim 2, wherein the resource allocation means includes a RAM table for storing data appertaining to the bit rate or bandwidth allocated to ABR traffic for transmission to each of the 'output side' SMU's.
Claim 4
Dependent Claim
85 words
An ATM communication system as claimed in Claim 3, wherein each SMU on the 'output side' of the switch includes an ABR request store which forms a part of 'output side' resource allocation means, within which ABR request store, ABR bandwidth requests are stored, the 'output side' resource allocation means being arranged to provide acknowledgement signals indicative of resource availability, which acknowledgement signals are transmitted across the switch to the 'input side' resource allocation means so as appropriately to initiate data transmission across the switch.
Claim 5
Dependent Claim
54 words
An ATM communication system as claimed in Claim 4, wherein the acknowledgement signals are arranged to indicate in respect of each 'output side' SMU when ABR bandwidth has become available and also when allocated ABR bandwidth should be withdrawn for the time being, thereby to make available bandwidth for other higher priority DBA traffic.
References Cited (Backward Citations)
WO1986002510A1
Cited
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