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US 5,101,404 AGranted
Signalling apparatus for use in an ATM switching system
AssigneeHitachi, Ltd.
InventorsMasao Kunimoto, Jiro Kashio, Makoto Mori, Shinobu Gohara
Life of this patent
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Abstract
A subscriber line signalling apparatus for use in an asynchronous mode communication system includes a switching circuit having a plurality of input terminals and a plurality of output terminals. The switching circuit selectively communicates fixed length information packets to an adaptation processing unit. The adaptation processing unit reassembles the fixed length packets to signalling frames, and transmits them to a frame processor.
Claims20
A broadband communication system comprising:
- a plurality of interface means each for communicating cell data with a pair of transmission lines;
- an asynchronous transfer mode switching means having a plurality of pairs of input and output lines operatively connected to the interface means for communicating cell data therewith;
- and
- a subscriber line signalling apparatus connected with the switching means through one of said pairs of input and output lines;
- the switching means including means for communicating control data cells with the subscriber line signalling apparatus through said one pair of input and output lines;
- the subscriber line signalling apparatus including,
- an adaptation processing unit for performing at least one of reassembly and segmentation of cell data to frame data,
- a link access processing means for processing frame data, and
- means for communicating frame data between the link access processing means and an associated data processing element.
6 more elements
A broadband communication method comprising the steps of:
- communicating cell data with transmission lines to an asynchronous transfer mode switching means;
- communicating control data cells between the switching means and a subscriber line signalling apparatus through one of pairs of input and output lines of the switching means;
- performing at least one of reassembly and segmentation of cell data to frame data by the subscriber line signalling apparatus;
- processing frame data for communication to an associated data processing element by the subscriber line signalling apparatus;
- and
- communicating processed frame data between the subscriber line signalling apparatus and the associated data processing element.
3 more elements
A subscriber line signalling apparatus comprising:
- a switching circuit having a plurality of input terminals and a plurality of output terminals, the switching circuit including means for directing a series of fixed length information packets in input terminals thereof to a selected output terminal thereof;
- a signalling frame processor for communicating a signal frame to an associated data processing element;
- and
- an adaptation processing unit for receiving fixed length information packets from an output of the switching circuit, the adaptation processing unit including means for communicating the fixed length information packets to the signalling frame processor in a signal frame form.
1 more element
A broadband communication system comprising:
- interface means for communicating cell data with an input transmission line;
- an asynchronous transfer mode switching means operatively connected to the interface means for communicating cell data therewith;
- means for communicating cell data between the asynchronous transfer mode switching means and a subscriber line signalling apparatus;
- the subscriber line signalling apparatus including,
- an adaptation processing unit for performing assembly of cell data to frame data,
- a data link processing means for processing frame data, and
- means for communicating frame data between the link access processing means and an associated data processing element;
- means for communicating frame data from the associated data processing element to a trunk line signalling apparatus;
- the trunk line signalling apparatus including an adaptation processing unit for performing segmentation of frame data to assembled cell data;
- and
- means for communicating assembled cell data between the trunk line signal processing apparatus and the asynchronous transfer mode switching means.
8 more elements
Dependencies are inferred from the claim text.