EP0468802A2
Expired / Lapsed
EP
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Broadband switching networks
Assignee: Toshiba Corp
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Filing: 1991-07-26
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Granted: —
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Expires: 2011-07-26
Abstract
Abstract Broadband switching networks are disclosed, which has a plurality of broadband switch nodes and a broadband switch inter-node transmission line for connecting the plurality of broadband switch nodes, information being transmitted by cells, each of which comprises a header and an information field, wherein the broadband switch nodes comprises a broadband input and output port for inputting and outputting the cells to and from the broadband inter-node transmission line, and a switch for separating the cells being input through the broadband input and output port and for multiplexing the cells so as to output them, wherein data composed of the plurality of cells is transmitted and received through the broadband switch node by constant bit rate transmission, variable bit rate transmission, or a combination of the constant bit rate transmission and the variable bit rate transmission.
Inventors
- 👤 Hiroshi c/o Intellectual Prop. Div. Kobayashi
- 👤 Yoshiharu c/o Intellectual Prop. Div. Hidaka
- 👤 Kazuo c/o Intellectual Prop. Div. Aida
- 👤 Takashi c/o Intellectual Prop. Div. Ikeda
- 👤 Motomitsu c/o Intellectual Prop. Div. Yano
- 👤 Kouichirou c/o Intellectual Prop. Div. Kamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:46
CPC Classifications
H; H04; H04L; H04L49/00; H04L49/20; H04L49/205; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L12/5602; H04L49/201; H04L49/25; H04L49/253; H04L49/254; H04L49/50; H04L49/501; H04L49/503; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04Q11/0485; H04Q11/0492; H04L2012/5614; H04L2012/5616; H04L2012/5625; H04L2012/5627; H04L2012/5629; H04L2012/5631; H04L2012/5632; H04L2012/5638; H04L2012/5639; H04L2012/5646; H04L2012/5647; H04L2012/5649; H04L2012/5651; H04L2012/5678; H04L49/30; H04L49/55
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
133 words
A broadband switching network having a plurality of broadband switch nodes and a broadband switch inter-node transmission line for connecting said plurality of broadband switch nodes, information being transmitted by cells, each of which comprises a header and an information field, said broadband switch node comprising: a broadband input and output port for inputting and outputting said cells to and from said broadband inter-node transmission line; and switching means for demultiplexing said cells being input through said broadband input and output port and for multiplexing said cells so as to output them, wherein data composed of said plurality of cells is transmitted and received through said broadband switch node by constant bit rate transmission, variable bit rate transmission, and a combination of said constant bit rate transmission and said variable bit rate transmission.
Claim 2
Dependent Claim
50 words
The broadband switching network as set forth in claim 1, wherein said information is transmitted in the order of said constant bit rate transmission, said variable bit rate transmission, and said combination of constant bit rate transmission and variable bit rate transmission in accordance with the priority of said information.
Claim 3
Dependent Claim
75 words
The broadband switching network as set forth in claim 1, wherein said network is arranged to perform a cell transmission control in that a user requests said network to permit a desired transmission speed of said cells to be transmitted to said network through said broadband switch node, said network permitting said user to transmit said cells at the desired transmission speed, said user transmitting said cells at the permitted transmission speed to said network.
Claim 4
Dependent Claim
82 words
A terminal equipment used in a broadband switching network having a plurality of broadband switch nodes and a broadband switch inter-node transmission line connected therebetween, said broadband switching network being arranged to transmit cells each of which is composed of a header and a information field so as to transmit information, wherein said terminal equipment is arranged to selectively discard said cells when the transmission speed permitted by said broadband switching network does not accord with that requested by said terminal equipment.
Claim 5
Dependent Claim
74 words
A broadband switching network having a plurality of broadband switch nodes and a broadband switch inter-node transmission line for connecting said plurality of broadband switch nodes, information being transmitted by cells, each of which comprises a header and an information field, wherein information which could not be transmitted when a transmission speed permitted by said broadband switching network is less than a speed requested by said terminal equipment is transmitted in a next frame.
Claim 6
Dependent Claim
40 words
The broadband switching network as set forth in claim 3, wherein said cell transmission control is performed for said Variable bit rate transmission, said constant bit ratetransmission, and said combination of constant bit rate transmission and constant bit rate transmission.
Claim 7
Dependent Claim
52 words
The broadband switching network as set forth in claim 3, wherein said cell transmission control is arranged to transmit the number of cells which is less than that which can be transmitted per unit time through a virtual path routed between terminating broadband switch nodes of said plurality of broadband switch nodes.
Claim 8
Dependent Claim
41 words
The broadband switching network as set forth in claim 7, wherein the number of cells which can be transmitted per said unit time through said virtual path can be temporarily changed depending on the traffic intensity in said broadband switching network.
Claim 9
Dependent Claim
36 words
The broadband switching network as set forth in claim 7, wherein the transmission speed by said cell transmission control is defined by the number of cells transmitted in a frame interval which is said unit time.
Claim 10
Dependent Claim
39 words
The broadband switching network as set forth in claim 9, wherein said cell transmission control is characterized in that said user segments information into cells with a fixed length and reconstructs original information by decellization in said frame interval.
Claim 11
Dependent Claim
40 words
The broadband switching network as set forth in claim 9, wherein said cell transmission control is arranged to randomize cell transmission intervals or transmission timings and to notify said user of said transmission intervals randomized or said transmission timings randomized.
Claim 12
Dependent Claim
23 words
The broadband switching network as set forth in claim 4, wherein cell transmission intervals or transmission timings is randomized when transmiting the cells.
Claim 13
Dependent Claim
23 words
The broadband switching network as set forth in claim 5, wherein cell transmission intervals or transmission timings is randomized when transmiting the cells.
Claim 14
Dependent Claim
36 words
The broadband switching network as set forth in claim 11, wherein said cell transmission control is accomplished over a cell base subscriber line interface or a private brunch line interface which provides a multi-point connection service.
Claim 15
Dependent Claim
112 words
The broadband switching network as set forth in claim 7, wherein said virtual path comprises: a first band for accommodating the sum of a transmission speed of a transmission service in said constant bit rate transmission and a constant bit rate transmission speed of a transmission service which is a combination of said constant bit rate transmission and said variable bit rate transmission; and a second band for accommodating the sum of a transmission speed of a transmission service in said variable bit rate transmission and a variable bit rate transmission speed of a transmission service which is a combination of said constant bit rate transmission and said variable bit rate transmission.
Claim 16
Dependent Claim
35 words
The broadband switching network as set forth in claim 3, wherein said cells which enter said broadband switching network are equally processed regardless of said constant bit rate transmission or said variable bit rate transmission.
Claim 17
Dependent Claim
34 words
The broadband switching network as set forth in claim 9, wherein a variable bit rate communication using a hierarchical coding system is handled by said cell transmission control in accordance with a particular priority.
Claim 18
Dependent Claim
70 words
A broadband switching network characterized in that communication resources are registered on management tables so as to rapidly handle a resumption request or a repeated call set request for a call which has been interrupted or disconnected, said communication resources being erased out of said management tables in accordance with the traffic intensity in said network or a communication request of another call so as to release said communication resources.
Claim 19
Dependent Claim
67 words
The broadband switching network as set forth in claim 1, wherein a cell unit fee, a communication time unit fee, and a path holding time unit fee are defined so that said user properly uses a resource in said network, said terminal equipment being charged in accordance with the number of cells being actually transmitted therefrom, a communication time, a path holding time, and a communication distance.
References Cited (Backward Citations)
No citation records indexed.
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