Patent EP0519827A2 successfully refreshed from Google Patents.
EP0360338A2
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EP
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Local communication bus system comprising a set of interconnected devices, a control bus, and a set of signal interconnections, and a device and a switchbox for use in such system
Assignee: Koninklijke Philips NV
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Filing: 1989-09-15
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Granted: —
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Expires: 2009-09-15
Abstract
Abstract In a local communication bus sytem there exist terminal devices (22, 24) and switchbox devices (20). All devices are interconnected by a single-channel control bus (30), that is used for establishing and retiring pairwise signal interconnections between the devices. The switchbox (20) contains an interconnection table, specifying which plug of which other device is connected to each of its own plugs. No global control is necessary. Neither is a complete picture of all signal interconnections required in any one device.
Inventors
- 👤 Bernard Van Steenbrugge
- 👤 Henricus Franciscus Adrianus De Leeuw
- 👤 Mihalis Efthimios Mastroyiannis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 04:42
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20; H04B1/205
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
287 words
Local communication bus system comprising a serial control bus attached to a plurality of devices that furthermore are plug to plug pairwise interconnected by respective signal interconnections and include at least one plural-plug switchbox means, said system for establishing and specifying a signal path between a source device and a destination device comprising: - in each respective device, interconnection table means interrogatibly storing information indicating any other device pairwise interconnected to said respective device, and the plug pair so interconnecting that other device; - in said source device first message generating means for generating, in case said source device and destination device are not pairwise interconnected, on said control bus a messaged Connect control command directed to any first switchbox means pairwise connected to said source device and indicating said destination device and in conjunction therewith a messaged Select control command directed to said destination device for thereto signalling and specifying said establishing; - in the first switchbox means so directed at, interrogating means for interrogating its interconnection table means for identifying the plug connected to said destination device if any, and control means for in the negative case controlling said first switchbox means as secondary source device for producing a further Connect control command to any second switchbox means connected thereto, until after a first sequence of such Connect control commands the destination device is reached, thereby said path is identified as a second sequence of such pairwise interconnections, between associated plug pairs, starting from said source device and terminating in said destination device, whereby said destination device is activated by said Select control signal for effecting the intended signal transfer, said system comprising activating means for in an initializing state activating said interconnection table means.
Claim 2
Dependent Claim
287 words
Local communication bus system comprising a serial control bus attached to a plurality of devices that furthermore are plug to plug pairwise interconnected by respective signal interconnections and include at least one plural-plug switchbox means, said system for establishing and specifying a signal path between a source device and a destination device comprising: - in each respective device, interconnection table means interrogatibly storing information indicating any other device pairwise interconnected to said respective device, and the plug pair so interconnecting that other device; - in said source device first message generating means for generating, in case said source device and destination device are not pairwise interconnected, on said control bus a messaged Connect control command directed to any first switchbox means pairwise connected to said source device and indicating said destination device and in conjunction therewith a messaged Select control command directed to said destination device for thereto signalling and specifying said establishing; - in the first switchbox means so directed at, interrogating means for interrogating its interconnection table means for identifying the plug connected to said destination device if any, and control means for in the negative case controlling said first switchbox means as secondary source device for producing a further Connect control command to any second switchbox means connected thereto, until after a first sequence of such Connect control commands the destination device is reached, thereby said path is identified as a second sequence of such pairwise interconnections, between associated plug pairs, starting from said source device and terminating in said destination device, whereby said destination device is activated by said Select control signal for effecting the intended signal transfer, said system comprising activating means for in an initializing state activating said interconnection table means.
Claim 3
Dependent Claim
122 words
A local communication bus system as claimed in Claim 1, wherein said source device has second message generating means for generating on said control bus a messaged Disconnect control command to said first switchbox and indicating said destination device, and in conjunction therewith a messaged first Deselect control command for to said destination device signalling said signal path as disconnectable; and wherein the first switchbox means so directed at has repeat means for repeating said interrogating for identifying said plug for release, and in the negative case generating a further messaged Disconnect control command to said further switchbox means until said path is reidentified for releasing any device located within said path, thereby deactivating said destination device with respect to said path.
Claim 4
Dependent Claim
64 words
A system as claimed in Claim 1 or 2, wherein said first message generating means comprise first producing means for producing a Connect command specifying an intended signal path between a particular plug of a switchbox subdevice and a particular destination (sub)device, and second producing means for producing a Select command informing said destination (sub)device of an intended signal transfer, and specifying such transfer.
Claim 5
Dependent Claim
88 words
A system as claimed in Claim 2, wherein said second message generating means comprise third producing means for producing a Disconnect command specifying an abandonable signal path between a particular plug of a switchbox (sub)device and a particular destination (sub)device, fourth producing means for producing a Deselect-subdevice command informing the destination (sub)device of a terminatable signal transfer, and fifth producing means for producing a Deselect plug command informing a particular switchbox means of a terminatable signal transfer with respect to a particular plug of the latter switchbox means.
Claim 6
Independent Claim
20 words
A system as claimed in any of Claims 1 to 4, wherein said serial control bus is a single-channel bus.
Claim 7
Independent Claim
62 words
A device for use as a source device in a system as claimed in either of Claims 1 to 5, wherein said first message generating means has sixth producing means for after said Control command persistently producing a Connected Request signal to evoke either a positive or a negative answer from said destination (sub)device or any other (sub)device in said second sequence.
Claim 8
Independent Claim
53 words
A device for use in a system as claimed in any of Claims 1 to 5, comprising seventh producing means for producing a Connected-to-subdevice request signal for investigating an activity of a particular (sub)device and in an active situation thereof investigating to which plug on which other (sub)device the particular (sub)device was communicating.
Claim 9
Independent Claim
55 words
A device for use in a system as claimed in any of Claims 1 to 5, comprising eighth producing means for producing a Connected-to-switchbox request signal for investigating for a particular plug of a particular switchbox means to which other (sub)device and plug(s) on these other subdevices the particular plug has an active signal interconnection.
Claim 10
Dependent Claim
70 words
A device for use in a system as claimed in Claim 1 or 2, comprising a switchbox subdevice and at least two further subdevices, said further subdevices being pairwise connected to said switchbox subdevice by means of respective signal interconnections, said switchbox subdevice realizing any signal connection outside said device, said switchbox subdevice having interconnection table means containing a table indicating any subdevice and plug pair interconnected within said device.
Claim 11
Dependent Claim
33 words
Switchbox means for use in a system as claimed in Claim 1 or 2, wherein said switchbox means has at least three plugs for pairwise connection to at least as many other (sub)devices.
References Cited (Backward Citations)
No citation records indexed.
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