Method and device for managing access to the transmission medium of a multiservice distributed switching network
First Claim
1. A method of managing access to the transmission medium of a multiservice distributed switching network adapted to switch traffic in synchronous circuit-switched mode and in synchronous or asynchronous packet-switched mode, said network comprising a transmission medium time-shared between different stations, said method comprising the steps of:
- providing as said transmission medium a synchronous transmission medium over which information is transmitted in repetitive frames in turn structured in time slots in turn structured in time cells, said time cells being sized to contain a communication entity which can be either a circuit-switched cell or a segmented packet-switched cell;
assigning to each said station a nominal time slot for access to the transmission medium in packet-switched mode; and
performing transmission medium access arbitration in each time cell, and for all stations, and granting priority access to said transmission medium for circuit-switched cells available in said each time cell in any of said stations.
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Abstract
Method and device for managing access to the transmission medium of a multiservice distributed switching network adapted to switch traffic in synchronous circuit-switched mode and in synchronous or asynchronous packet-switched mode, the architecture of the network being based on a transmission medium time-shared between different stations characterized in that: (1) the transmission medium is synchronous and structured in frames in turn structured in time slots in turn structured in time cells, the latter being sized to contain a communication entity which can be either a circuit-switched cell or a segmented packet-switched cell, (2) an ideal time slot for access to the transmission medium in packet-switched mode is assigned to the respective stations communicating within the network, and (3) in each time cell and for all stations transmission medium access arbitration is applied to procure priority access to this medium for circuit-switched cells available at this time in any station.
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Citations
11 Claims
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1. A method of managing access to the transmission medium of a multiservice distributed switching network adapted to switch traffic in synchronous circuit-switched mode and in synchronous or asynchronous packet-switched mode, said network comprising a transmission medium time-shared between different stations, said method comprising the steps of:
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providing as said transmission medium a synchronous transmission medium over which information is transmitted in repetitive frames in turn structured in time slots in turn structured in time cells, said time cells being sized to contain a communication entity which can be either a circuit-switched cell or a segmented packet-switched cell; assigning to each said station a nominal time slot for access to the transmission medium in packet-switched mode; and performing transmission medium access arbitration in each time cell, and for all stations, and granting priority access to said transmission medium for circuit-switched cells available in said each time cell in any of said stations. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for managing access to a synchronous transmission medium time-shared between different stations of a multiservice distributed switching network adapted to switch traffic in synchronous circuit-switched mode and in synchronous or asynchronous packet-switched mode, said transmission medium comprising a synchronous transmission medium over which information is transmitted in repetitive frames in turn structured in time slots in turn structured in time cells, said time cells being sized to contain a communication entity which can be either a circuit-switched cell or a segmented packet-switched cell said device comprising means for assigning to each said station a nominal time slot for access to the transmission medium in packet-switched mode, and means for performing transmission medium access arbitration in each time cell, and for all stations, and for granting priority access to said transmission medium for circuit-switched cells available in said each time cell in any of said stations, said device being distributed between said different stations and comprising:
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a series of registers at each station dedicated to each type of traffic; detecting means at each station for detecting in said each time cell the state of said registers; and arbitration means at each station for determining the traffic and/or the station having the highest priority in said each time cell. - View Dependent Claims (8, 9, 10, 11)
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Specification