WO2001082647A1 - System zur übertragung von information - Google Patents
System zur übertragung von information Download PDFInfo
- Publication number
- WO2001082647A1 WO2001082647A1 PCT/AT2001/000085 AT0100085W WO0182647A1 WO 2001082647 A1 WO2001082647 A1 WO 2001082647A1 AT 0100085 W AT0100085 W AT 0100085W WO 0182647 A1 WO0182647 A1 WO 0182647A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- subscriber
- data
- network
- unit
- atm
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5614—User Network Interface
- H04L2012/5615—Network termination, e.g. NT1, NT2, PBX
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5638—Services, e.g. multimedia, GOS, QOS
- H04L2012/5671—Support of voice
Definitions
- the invention relates to a system for the transmission of information between one with a data cell transmission network, e.g. an ATM network, related data cell multiplex unit and at least one subscriber network termination unit to which one or more subscriber data terminals are connected via terminal interfaces, the subscriber network termination units and the data cell multiplex unit via a plurality of digital transmission lines are connected, and wherein for the transmission of voice information an office part connected to the ATM network of a switching center of a telephone network and at least one subscriber-side local part with at least one part number interface for analog or digital voice terminals are provided.
- a data cell transmission network e.g. an ATM network, related data cell multiplex unit and at least one subscriber network termination unit to which one or more subscriber data terminals are connected via terminal interfaces, the subscriber network termination units and the data cell multiplex unit via a plurality of digital transmission lines are connected
- voice information an office part connected to the ATM network of a switching center of a telephone network and at least one subscriber-side local part with at least one part number
- broadband subscribers are connected to a data transmission network via existing copper two-wire transmission lines (local loop, copper access network) and transmission systems based on an xDSL transmission method, e.g. HDSL (High Speed Digital Subscriber Line), VDSL (Very High Speed Digital Subscriber Line), ADSL (Asymmetrie Digital Subscriber Line) or the like.
- a broadband network termination unit with a suitable interface for example ATM, Ethernet, USB or the like, is provided on the subscriber side, via which the subscriber can send or receive data.
- a DSLAM Digital Subscriber Line Access Multiplexer
- a regional data network backbone network
- voice narrowband services such as POTS (Piain Old Telephone System) and ISDN (Integrated Services Digital Network)
- the voice signal can be transmitted analogously via the, as is the case with ADSL transmission, for example Transfer two-wire line and be separated from the broadband signals, which are located above the speech frequency spectrum, by means of appropriate high / low-pass filters.
- the voice signal is decoupled directly at the DSLAM multiplex unit, the individual voice channels being connected directly to a POTS or ISDN switching center.
- ISDN the number of voice channels for each subscriber is limited to a maximum of two digital channels for each transmission line, although the transmission bandwidth enabled a significantly higher number of channels.
- Another essential restriction is the mandatory local match between the switching center and the DSLAM multiplex unit, since otherwise the signals sent by the subscribers via the digital transmission lines cannot be transmitted to a public telephone network.
- Providers of private data transmission services are therefore limited in their options in that they are always dependent on the presence of a public exchange in their area for the provision of telephone services.
- the object of the invention is therefore to provide a transmission system of the type mentioned at the outset, with the aid of which the speech signals can be integrated into the broadband data transmission and a joint transmission of speech signals and data.
- Another task is to equip existing data cell transmission networks with additional voice transmission channels.
- the at least one subscriber-side local part is in each case connected between a subscriber-side interface of the at least one subscriber network termination unit and the terminal interface of one of the subscriber data terminals, and in that the local part is a unit for input and Hiding data lines in or out of the data cell stream transmitted between the subnet mer network termination entry and the subscriber data terminal device.
- the local part is a unit for input and Hiding data lines in or out of the data cell stream transmitted between the subnet mer network termination entry and the subscriber data terminal device.
- Existing network termination units can be kept unchanged and can be supplemented with a voice transmission system by means of the local part which is simply connected between the network termination unit and the subscriber data terminal, so that existing transmission systems can be retrofitted with relatively little effort.
- the voice information can be transmitted in the data cell network and can be broken down into individual voice channels again at a suitable point where a corresponding office part is formed, which can reach a receiving telephone subscriber of a telephone network via a switching center, for example.
- the data cell multiplex unit can be arranged locally independently of a telephone exchange.
- the data cells for the transmission of the speech information are formed by AAL2 cells.
- the transmission of voice information by means of AAL2 cells enables a fast conversion of voice data into ATM cells and a low empty occupancy of data cell packets.
- the subscriber-side interface of the network termination unit can be formed by a 25.6 Mbit / s ATM interface. In this way, a relatively large number of narrowband channels can be implemented in addition to a high bandwidth for the broadband transmission of the subscriber data terminals.
- a variant of the invention can consist in that the terminal interface of the subscriber data terminal is formed by a 25.6 Mbit / s ATM interface, whereby a high bandwidth for the broadband transmission of the subscriber data terminals is achieved can.
- Fig.l is a block diagram of an embodiment of the transmission system according to the invention.
- FIG. 2 shows a block diagram of a further embodiment of the transmission system according to the invention.
- FIG. 1 shows, among other things, an ATM transmission network 106, in which the data streams used for information transmission are divided into cells, each of which is formed from a cell header or a user data field. Cells of this type are transmitted asynchronously and switched in packets. For the switching of the cells between successive transmission sections, the identifier contained in the cell header is evaluated, via which it can be determined which ATM connection is present and to which address the data packets are to be routed.
- the invention can also be used in other data cell transmission networks.
- the ATM transmission network 106 has a plurality of network junctions at which connections to other networks are established. There is a connection to a wide area public network 104, e.g. Internet, via an ATM interface 126, e.g. DS3, STM1, OC3 or the like, and a router 103.
- a wide area public network 104 e.g. Internet
- an ATM interface 126 e.g. DS3, STM1, OC3 or the like
- the ATM transmission network 106 is connected to a local exchange, a telephone network 102 via an exchange 105 '. Office part is to be understood quite generally as an interface between the ATM transmission network 106 and the switching center 101.
- Members of the ATM transmission network 106 can use various data transmission services which are available via different subscriber data terminals 71, 61, 72, 62.
- a computer 71, 72 and also a video receiving unit 61, 62 with television screens 51, 52, for example for video-on-demand applications are shown as data terminals for the purposes of illustration are connected to network termination units 10, 20 via corresponding terminal interfaces 31, 41 and 33, 43.
- the terminal interfaces 31, 41 can be designed, for example, as ATM, Ethernet and / or USB interfaces.
- the connection to the ATM network 106 takes place via an ATM interface 127 and a data cell multiplex unit (DSL AM) 107, to which the two subscriber network termination units 10, 20 are connected via digital transmission lines 15, 16.
- DSL AM data cell multiplex unit
- the number of subscriber network termination units and the digital transmission lines is in Ralimen of the invention and the number of subscriber-side interfaces provided on the network termination units are not subject to any restriction.
- the data traffic within the ATM network 106 or between the network participants can be organized in different ways, for example a PVC (Permanent Virtual Circuit) connection or an SVC (Switched Virtual Circuit) connection, so that data cells are either permanent and be transmitted regardless of the presence of information to be transmitted or only when required.
- An xDSL method for example ADSL, HDSL, VDSL or the like, in which the data traffic takes place bidirectionally, can be used as the method for the transmission between the partial network termination units 10, 20 and the data cell multiplex unit 107.
- the ATM data cell streams coming from the partial timer network termination units 10, 20 are concentrated in the data cell multiplex unit 107 and forwarded to the ATM transmission network 106 via the interface 127.
- the ATM data cell streams are divided between the network termination units 10, 20.
- the office part 105 'of the switching center 101 and local parts 1, 2 with subscriber interfaces for analog or digital voice terminals 11, 12, 13, 14, 21, 22 , 23, 24 are formed.
- the districts 1, 2 are each connected between the subscriber-side interfaces 32, 42 of the sub-network end termination units 10, 20 and the terminal interfaces 33, 43 of the subscriber data terminals 61, 62.
- Each district 1, 2 comprises a unit 93, 94 for fading data cells in and out of the data cell stream transmitted between the subscriber network termination unit 10, 20 and the subscriber data terminal 61, 62 (FIG. 3) ,
- Each district 1, 2 is assigned its own PVC or its own SVC, via which the voice information of several voice terminals 11, 12, 13, 14 and 21, 22, 23, 24 is transmitted.
- each voice terminal 11, 12, 13, 14, 21, 22, 23, 24 can be assigned its own PVC or SVC.
- the voice terminals 11, 12, 13, 14, 21, 22, 23, 24 are preferably designed as digital terminals, but can also be designed as analog terminals if suitably implemented.
- a prerequisite for the use of the invention in an ATM network according to FIG. 1, 2 is the presence of an ATM interface, for example a 25.6 MBit / interface, in the subscriber network termination unit 10, 20 and in the subscriber -Data terminal 61, 62.
- Different connections for example AAL1, AAL2, or the like, can be assigned to each connection within the ATM network, in each case several cells being combined and transmitted to form a packet.
- the AAL2 standard is preferably used for the transmission of the voice information within the ATM network 106.
- each subscriber interface circuit can be formed by a SLIC (Subscriber Line Interface Circuit) unit and the number The SLIC units depend on the number of participants to be connected to the district 1, 2.
- a common CODEC device 73 e.g. according to G.711, as well as a common unit for compressing the speech signals, e.g.
- G.72x or to suppress the speech speech pauses 72 connect to the SLIC units 81, 82, 83, 84, so that the speech terminals 11, 12, 13, 14, 21, 22, 23, 24 incoming analog voice signals are converted into compressed and pulse-coded PCM signals, combined into a data stream by means of a time-division multiplex method and fed to an AAL unit 71.
- the coding / decoding process is eliminated.
- the data stream coming from an AAL unit 71 is decompressed, decoded and distributed to the individual subscriber interface circuits 81, 82, 83, 84.
- the PCM signal originating from the speech terminals 11, 12, 13, 14, 21, 22, 23, 24 is converted into ATM data cells and in the data fade-in and fade-out unit 93, 94 in shows the ATM data cell stream coming from a data terminal 61 or 62.
- the data cell stream thus combined passes via a TC (transmission convergence) layer 92, which is responsible for the packet-wise arrangement of the data cells, and a 25 Mbit / s ATM interface unit 91 in the direction of the network termination unit 10.
- Spracli channels present in cells are transmitted together with the broadband channels (PVC permanent virtual circuit) of the data terminals 61, 62 via the transmission line 15 to the multiplex unit 107.
- the ATM data cells After merging with the data line stream of the other transmission line 16, the ATM data cells enter the ATM network 106 and are switched there according to their addresses. Those data cells which contain voice signal data from the voice terminals 11, 12, 13, 14, 21, 22, 23, 24 are, on account of their addressing, to the office part 105 '(FIG. 1) or 105 (FIG. 2) mediated and processed there accordingly.
- the ATM data streams coming from the office parts 105 ', 105 are conveyed via the ATM network 106 to a specific voice subscriber, for example with the voice terminal 11, by the corresponding voice information from the telephone network 102 in ATM cells is housed with a specific address, via which this information is transmitted via the ATM network 106 to the appropriate network termination unit 10, from where the transmission to the local part 1 and to the speech terminal 11 is continued, the suitable part in the local part 1 Assignment to the addressed subscriber is made.
- the ATM data cell stream passes through the ATM Interface 91 and the TC layer 92 to the fade-in and fade-out unit 93, 94, in which the ATM cell data used for the transmission of the voice information are faded out of the ATM data line stream and sent to the AAL unit 71, in which the voice information is sent out is extracted from the data cells and converted into a PCM data stream which, after appropriate processing, is divided as a speech signal into the subscriber interfaces 81, 82, 83, 84, which in themselves represent narrowband interfaces.
- the maximum number of partial timer interfaces for each district depends on the bandwidth available in addition to the broadband application of the subscriber. For four voice channels, each with 64 kbit / s, only about 1% of the total bandwidth of an ATM 25.6 Mbit / s interface is required. If the bandwidth of the voice connections is to be reduced even further, appropriate compression algorithms can be used, as shown in Fig. Call pause suppression can be used.
- the district 1, 2 is preferably equipped with two to eight subscriber interfaces, but any number of subnumber interfaces can be provided.
- 5 shows the office part 105 of the embodiment according to FIG. 2, which is connected via a 2 Mbit / s interface 125 (FIG. 1), e.g. ITU standards G.703 and G.804, is coupled to the ATM network 106.
- the ATM data cells coming from the ATM network 106 are converted back into individual voice channels in the office section 105.
- the ATM data cell stream is divided into individual PVC / S VCs after passing through a TC-layer functional unit 193 or, in the opposite direction, several PVCs and / or SVCs are combined to form a total stream.
- AAL2 unit 171 which is available per PVC or SVC
- the ATM data line streams are processed to PCM streams and in a compression unit 172, these are compressed or decompressed.
- a timeslot assignment unit 173 the assignment of the digital voice data channels to timeslots of a 2 Mbit / s interface takes place, a central control unit 197 controlling the assignment of the timeslots and the function of the AAL2 unit 171.
- the central control unit 197 takes over the conversion of the signaling information from AAL2 to V5.1 and, in the opposite direction, the conversion of the V5.1 signaling information into signaling specific for AAL2.
- the serial digital voice data channels are connected to the ISDN switching center 101 of the telephone network 102 via the 2 Mbit / s interface 121, which corresponds, for example, to the ITU standard G.703 / G.704. This corresponds to a capacity of up to 30 narrowband interfaces, which can be transmitted via a single physical interface.
- V5.1 in accordance with ETSI ETS 300 324-1 is used as the signaling protocol, which is why there is no concentration in the office section 105.
- a complex bus architecture for forwarding the data via backplane wiring is not required.
- an additional part of the office is made available. Since each office part can work independently, there is a high level of system redundancy.
- the provision of analog a / b interfaces via the switching center 101 ' is shown in FIG. 1, the office part 105' being shown in detail in FIG.
- An additional CODEC unit 174 ensures the conversion of the digital speech channels into analog channels, which are connected to individual line cards of the POTS switching center 10 of the telephone network 102 via SLIC units 181, 182, 183, 184.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU43932/01A AU4393201A (en) | 2000-04-19 | 2001-03-22 | System for transmitting information |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT6962000A AT408594B (de) | 2000-04-19 | 2000-04-19 | System zur übertragung von information |
ATA696/2000 | 2000-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001082647A1 true WO2001082647A1 (de) | 2001-11-01 |
Family
ID=3679283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2001/000085 WO2001082647A1 (de) | 2000-04-19 | 2001-03-22 | System zur übertragung von information |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT408594B (de) |
AU (1) | AU4393201A (de) |
WO (1) | WO2001082647A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113098667A (zh) * | 2021-03-30 | 2021-07-09 | 联芸科技(杭州)有限公司 | 数据传输方法、***、计算机设备和介质 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998024228A2 (en) * | 1996-11-27 | 1998-06-04 | Alcatel Usa Sourcing, L.P. | Optical network unit for communicating telephony and video information |
EP0915634A2 (de) * | 1997-11-06 | 1999-05-12 | Lucent Technologies Inc. | Rufzulassungssteuerung in einem Sprachpaketsystem |
WO1999030242A1 (en) * | 1997-12-05 | 1999-06-17 | Telcordia Technologies, Inc. | Xdsl-based internet access router |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3081822B2 (ja) * | 1997-11-14 | 2000-08-28 | 日本電信電話株式会社 | Atm交換装置 |
JP3019057B2 (ja) * | 1998-03-27 | 2000-03-13 | 日本電気株式会社 | Atmセル転送制御方法及び転送制御方式 |
-
2000
- 2000-04-19 AT AT6962000A patent/AT408594B/de not_active IP Right Cessation
-
2001
- 2001-03-22 AU AU43932/01A patent/AU4393201A/en not_active Abandoned
- 2001-03-22 WO PCT/AT2001/000085 patent/WO2001082647A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998024228A2 (en) * | 1996-11-27 | 1998-06-04 | Alcatel Usa Sourcing, L.P. | Optical network unit for communicating telephony and video information |
EP0915634A2 (de) * | 1997-11-06 | 1999-05-12 | Lucent Technologies Inc. | Rufzulassungssteuerung in einem Sprachpaketsystem |
WO1999030242A1 (en) * | 1997-12-05 | 1999-06-17 | Telcordia Technologies, Inc. | Xdsl-based internet access router |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113098667A (zh) * | 2021-03-30 | 2021-07-09 | 联芸科技(杭州)有限公司 | 数据传输方法、***、计算机设备和介质 |
CN113098667B (zh) * | 2021-03-30 | 2023-06-23 | 联芸科技(杭州)股份有限公司 | 数据传输方法、***、计算机设备和介质 |
Also Published As
Publication number | Publication date |
---|---|
AU4393201A (en) | 2001-11-07 |
AT408594B (de) | 2002-01-25 |
ATA6962000A (de) | 2001-05-15 |
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