CN1315097A - Method for controlling the provision of at least one additional transmission channel as access to a packet switching network - Google Patents

Method for controlling the provision of at least one additional transmission channel as access to a packet switching network Download PDF

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Publication number
CN1315097A
CN1315097A CN99810191A CN99810191A CN1315097A CN 1315097 A CN1315097 A CN 1315097A CN 99810191 A CN99810191 A CN 99810191A CN 99810191 A CN99810191 A CN 99810191A CN 1315097 A CN1315097 A CN 1315097A
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CN
China
Prior art keywords
packet
access node
transmission channel
additional
business information
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Granted
Application number
CN99810191A
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Chinese (zh)
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CN1114299C (en
Inventor
C·普雷霍菲尔
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Siemens AG
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Siemens AG
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Publication of CN1315097A publication Critical patent/CN1315097A/en
Application granted granted Critical
Publication of CN1114299C publication Critical patent/CN1114299C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H04L47/724—Admission control; Resource allocation using reservation actions during connection setup at intermediate nodes, e.g. resource reservation protocol [RSVP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
    • H04L47/762—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions triggered by the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/803—Application aware
    • 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
    • H04Q11/0435—Details
    • H04Q11/0457—Connection protocols

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

The invention relates to an access node (POP) to the packet switching network (PN). Said access node is connected to a digital telephone switching system (VST) of a line switching network (LN) and distinguishes the data packets, said data packets being separately characterized by traffic information, from the entering data packets. According to the traffic information, the node brings about the provision of at least one additional transmission channel in order to provide a connection with at least one existing transmission channel to a common transmission link between the access node and at least one subscriber terminal device (TLN) and/or private branch exchange.

Description

Control provides the method for at least one additional transmission channel conduct to the access of a packet network
The present invention relates to a kind ofly provides at least one additional transmitted channel as the method to the access of a packet network according to claim 1 control.
From following disclosed network condition, for example in Siemens Company's disclosed client's brochure " EWSD is to the Internet " in 1997, title number: A50001-N2-P65-2-7600, the 7th page of this network condition that goes up explanation.
The user of a traditional circuit switched telephone network obtains the channel of a packet network, this user wants to use for example service of the Internet of a packet network, can realize this requirement by following method: directly or indirectly for example people's computer or a telephone plant are connected to an access node that is connected with digital telephone exchange system to the user one by one by a subscriber terminal equipment that is connected with private branch exchange, this switching node access package switching network, user class helps a browser then, set up a connection to a destination node of packet network, a for example service provider's computer, and the service of asking such computer.
Institute's requested service, for example video request program, the voice service on the IP or video conference circuit need high and a guaranteed transmission bandwidth and a little delay.
About the Internet, under the notion of " integrated service " and " segmentation service ", two value-added services are discussed at present, when transmission belonged to the data of this service, it guaranteed requested transmission bandwidth and little delay.
First annex " integrated service " is based upon for example RSVP (RSVP of an IP signaling agreement; " RFC file ", RFC2205, by R.Braden, L.Zhang, S.Berson, S.Herzog, S.Jamin book, in September, 1997, the professional power of internet engine is in the Internet net network address: http://info.internet.isi.edu:80/innotes/rfc/fi-les/rfc2205.txt goes up openly the document) the basis on.Have the packet of unique signaling capability by exchange, set up the source node of the Internet and/or the connection between the destination node, and at first be identified for asking between the source and destination node transmission bandwidth of the application data of service.By such packet, can remove this connection once more with unique signaling capability.If after a definite time delay, between the source and target node, transmission is not responsible for keeping the packet with unique signaling capability of connection, and that replaces so can finish this connection.
Second annex " service of difference " (" internet draft "-document, by K.Nichols and S.Blake book, in February, 1998, the professional power of internet engine is at interconnected network address: disclose the document http://www.ietf.org/internent-draft/draft-nichols-dsopdef-OO.tx t on) advise that a kind of method, this method can quicken from the data packet transmission of source node to a destination node.For belonging to a packet that requires the high-transmission bandwidth service, the certain bits of so-called TOS byte is set respectively in the head part of this packet.According to position set in the TOS byte, the such packet of preferred process in intermediate node, and be transferred to destination node from source node by this intermediate node packet, therefore, at first almost do not having to have realized the nearest centre or the acceleration relaying of destination node under the situation about postponing.
About circuit switched (phone) network, at present on the span line between an access node and the subscriber terminal equipment, can use different possible methods, improve transmission bandwidth, in analog subscriber connects, transmission bandwidth moment is 56 kbps to the maximum, is not having under the situation of channel group, and the isdn user is connected to 64 kbps.
For such service, the feasible way that realizes the high-transmission bandwidth is so-called MultiLink PPP agreement (" a RFC file ", RFC 1990, by K.Sklower, B.Lloyd, G.McGregor, D.Carr and T.Coradetti book, in August, 1996, Internet EngineeringTask Force is at interconnected network address: http://www.internet.isi.edu:80/in-notes/rfc/files/rfc1990.txt goes up openly the document), this MultiLink PPP protocol specification is to controlling an expansion to the ppp protocol of communicating by letter between the access node of the Internet and the subscriber terminal equipment.Precondition is: from such access node, (for example connect substantially: 2B channel 64 kbps and 1 data channel, 16 bps or an ISDN master in multiplexing the connection by several transmission channels at an ISDN, 30 B channels and 1 D-channel 64 kbps) several are connected can be established to a subscriber terminal equipment, provide the method for an additional transmitted channel by the common transmission section of the transmission channel that had to one, set up between subscriber terminal equipment and the access node one have the transmission bandwidth that improved (for example in an ISDN connects substantially 128 kbps and/or in a multiplexing connection of ISDN master about 2 megabit per seconds) connection.
Yet in this method, the user provides with decision only or discharges such transmission channel.Therefore this suggestion is static.In addition, owing to provide at least one additional transmission channel whether not rely on essential additional transmitted channel that is used to improve transmission bandwidth to the user, therefore danger is higher,
Use so-called " always open/dynamic ISDN " technology (AO/DI) to realize that control provides and discharge other annexes of additional transmission channel (technology memorandum for example: " always opening/dynamic ISDN ", by the A.Kuzma book, open in October, 1997, publisher: ISDN affiliated company, 2694 Bischop drive, group 105, San Ramon, CA 94583).This method suggestion: using under the MultiLink PPP terms of agreement, when ISDN, several B channels are connected in combination.By a D channel, provide an arrowband to continue virtual connections, for example use the transmission bandwidth of 9.6 kbps to insert the Internet, when needed, can expand the transmission bandwidth (for example in an ISDN connects substantially, 128 kbps) of above-mentioned virtual connections by the method for connecting the B channel.
The AO/DI technology is used other so-called BAP/BACP agreement (" RFC file ", RFC number 2125, by C, Richards and K.Smith book, in March, 1997, the professional power of internet engine is at interconnected network address: http://info.internet.isi.edu:80/in-notes/rfc/files/rfc2125.txt goes up openly the document) so that can and insert between the access node of the Internet, about providing and discharging such transmission channel and communicate by letter at a subscriber terminal equipment.For example isdn user needs a B channel be used for phone, and this B channel has been asked the data of serving shared by belonging to.At this moment, depending on user control provides and discharges such transmission channel.
This unique basic shortcoming of controlling that depends on user action has been described in the above.
In addition,, depend on specific service parameter, provide or discharge transmission channel by means of the AO/DI technology.Therefore for example when in access node, when on the data that will transmit, existing high volume of services, so for example can provide additional transmission channel.On the contrary, in access node, when the volume of services that enters is low, discharge transmission channel once more.
Because in a packet network, the Internet for example, there is not the transmits data packets of connection, just separate transmission belongs to the data of a connection, and do not need the queuing assurance and do not need confirmation of receipt, so volume of services comes and go very much in such access node, therefore be difficult to estimate volume of services.When danger at this moment is that volume of services is very little in access node, is not intended to be released to one once more the additional transmission channel that provides and so lost data packets are provided.For example when the additional transmission channel that provides occur to be not intended to is provided, connect in (voice on IP) at the internet voice between two users so, two users can not converse in several seconds just.
Therefore the AO/DI technology will cause uncontrolled coupling transmission bandwidth, and this transmission bandwidth is by providing or discharging additional transmission channel, can be used to transmit belong to the user and ask the data of serving.
In addition, not only for price reasons, the lasting existence of connection of receiving access node by the D channel also is disadvantageous.This connection causes therefore when having improved signaling service inlet, chunk data may occurring and blocking for the low available transmission bandwidth of signaling service.
Present task of the present invention is: the following arrangement of the method for illustrated mode in claim 1 preamble: as far as possible dynamically and controllably and equally as much as possible provide the additional transmitted channel with good cost performance control.
Solve this task by feature in the explanation of claim 1 declaratives.
Based on principle of the present invention is that access node is judged such packet that uses a business information sign respectively from the packet that all enter.At this moment, for that packet that uses business information to indicate respectively, the transmission bandwidth that has improved is essential, and this business information belongs to user institute requested service.According to business information, access node is at access node and subscriber terminal equipment that at least one is such and/or the span line between the private branch exchange, for a connection that has a transmission channel that has existed at least provides at least one additional transmission channel.
The special advantage of the present invention is to provide a large amount of enough transmission channels by complete in check dynamic control.According to the present invention, depend on for the essential transmission bandwidth of ask service at least one additional transmitted channel is provided, this transmission bandwidth is included in the service business information.The action of user's one side is optional, and this user's control provides at least one additional transmission channel.In addition, one so the dynamic control by business information control minimize along with at least one danger that such additional transmitted channel occurs is provided, this danger makes sends requesting users and considers this service.
Other design of the present invention is described in the dependent claims.
A preferred formation of the present invention relates at least one additional like this transmission channel of release.After judging a packet that uses an isolation information sign respectively that enters, access node may cause such release.With the form of isolation information, the unique signaling that discharges at least one channel that adds like this prevents to be not intended to finish to provide at least one additional like this transmission channel.
The recommendation on improvement that the present invention replaces: if in a definite duration scope, in access node, do not enter and when judging the packet that uses business information sign respectively, access node will discharge already provided transmission channel that at least one adds so so.Therefore, use little realization expense that at least one the additional transmission channel that finishes to provide like this is provided.
The useful improvement according to the present invention comprises such business information in the bit pattern in the head of such packet.Therefore packet may be autotelic, so after such business information, can the quick check packet.
In this relation, other preferred design recommendations of the present invention: such bit pattern can transmit and will add the number that transmission channel is provided.Make in this way, obtain the number of the essential transmission channel that decision adds according to bit pattern for access node.
Replace other above-mentioned designs, can be by a such business information of data packet transmission with unique signaling capability.This has special advantage: because behind the same channel of empirical tests, before transmitting user data, can provide additional transmission channel in access node.
Preferred in addition improvement of the present invention is the danger that the additional transmission channel that provides can be provided with the packet of business information sign respectively.Make in this way, the user can not be calculated automatically along with the danger that provides such additional transmitted channel to bring.
Next with reference to the accompanying drawings, describe embodiments of the invention in detail.
Therefore, subscriber terminal equipment TLN for example telephone plant or one by one people's computer by a subscriber connection line and a circuit switching network normally public switched telephone network be connected.Such subscriber terminal equipment can be connected to a private branch exchange, and this private branch exchange has a connection to circuit switching network.In circuit switching network, provide a digital telephone exchange system VST at least, at least one access node POP that is connected to packet network PN is connected in this system.Such access node can be integrated in the digital telephone exchange system.In the scope of packet network PN, according to the thinking methods of transmitting apparatus, source and/or destination node show this node or directly or by the intermediate node that not have among the figure to illustrate are connected with access node.Such source and/or destination node be a computer of identification service provider for example.In order to set up a connection between subscriber terminal equipment and the access node, can consider that body provides several transmission channels.
The method according to this invention, can advise following situation:
User and subscriber terminal equipment are by the Data-phone switching system in the circuit switching network and pass through access node, construct one to for example for example connection of the service provider's of the Internet a computer of packet network of destination node UZ, ask a service that must guarantee the high-transmission bandwidth.Service provider's computer sends the packet with unique signaling capability to subscriber terminal equipment, mentions the reservation supply of RSVP when this packet comprises preferably according to beginning.According to the application program arrangement of user or user's use, subscriber terminal equipment oppositely sends the packet with unique signaling capability to service provider's computer, and this packet comprises for example business information of 80 kbps of a reservation form.If this packet enters access node, and access node judges this this packet, and access node is analyzed the business information of packet and packet further is sent to service provider's computer so.On public span line between access node and the subscriber terminal equipment, for the connection of the transmission channel that had provides at least one other transmission channel.The data that belong to the service of asking can be transmitted at least two transmission channels between subscriber terminal equipment and the access node now.Depend on the content of business information, under the situation that an ISDN connects substantially, can provide an additional B channel, and in a multiplexing connection of ISDN master, can provide up to 30 B channels.
Can at first impelling of replacing provides at least one additional transmission logical, and the form of a B channel for example is when the application data bag of asking to serve when data enters access node.
When the packet with unique signaling capability that is equipped with isolation information enters node and judged by this access node, access node causes discharging at least one additional like this transmission channel that provides so, above-mentioned informational function or send or the computer that provides from service sends from subscriber terminal equipment.
The content that discharges other possibilities of such additional transmitted channel is: if in a definite duration scope, access node causes such release so.
Replace said circumstances, it is also conceivable that following situation.
A user asks a service with high-transmission bandwidth in service provider's computer after, computer is along the application data bag that sends this service of data to the direction of user terminal, and these application data bags have the sign of representing with the form of the bit pattern of head part corresponding to the business information of request transmission bandwidth.Such bit pattern can preferably be arranged in TOS byte above-mentioned.The value of at this moment such bit pattern is corresponding to essential transmission bandwidth and/or the transmission channel that provides will be provided.After occurring in access node and judging the packet of sign like this, access node impels provides at least one other transmission channel.At this moment access node causes discharging so at least additional transmission channel that provides, and when in the scope of a definite duration, does not use the packet of such business information sign to enter access node and by its judgement.
The situation of describing above can not consider only to be used for this.More precisely, they can make up mutually.For example user thinks simultaneously several services of computer request from the service provider.For providing additional transmission channel, first requested service for example can realize by the packet that in first situation, illustrates with unique signaling capability.For other requested service, can provide an additional transmission channel according to the application data bag of in second kind of situation, mentioning, this application data bag is characterised in that the head part with a business information.Determine that how many additional transmitted channels are available, perhaps by analyze the business information have in unique signaling capability packet respectively and in the application data bag business information in the head part, perhaps by all business information available in access node of general analysis.
In addition, the method according to this invention and additive method are parallel preferably to carry out multi-protocols method above-mentioned or AO/DI technology, perhaps is similar to combining with them of above explanation.Especially, the method according to this invention is not got rid of the user and is taked to move and at least one is provided additional transmission channel or discharges at least one such transmission channel.For example this is suitable for: if when the user wants to use transmission channel to make a phone call, this channel for transmission belong to ask the data of service shared.
The following packet that may use business information to identify respectively may influence the danger that the additional transmitted channel is provided.Substitute the user of request service, the danger of the additional transmission channel that provides is provided, for example the service provider can be all or part of bells the cat for another.

Claims (7)

1, provide at least one additional transmitted channel as the method that is inserted to a packet network (PN), in circuit switching network (LN), information can be with the form of data and/or may be with the form of voice, between the private branch exchange of access node (POP) that one and packet network connect and at least one subscriber terminal equipment (TLN) and/or at least one connection subscriber terminal equipment, transmit, wherein such access node further transmits from the information of circuit switching network output along the form of the direction that enters at least one destination node of packet network (UZ) with packet, and be included in information from the packet that at least one source node (UZ) of packet network transmits like this, by such transmission channel, with with the form of circuit switched coupling, be transferred to so at least subscriber terminal equipment and/or private branch exchange, it is characterized in that, access node is judged the packet that uses business information to identify respectively from the packet that enters, and according to business information, at access node and subscriber terminal equipment that at least one is such and/or the public span line between the private branch exchange, for at least having the connection of a transmission channel, at least one additional transmission channel is provided.
According to the method for claim 1, it is characterized in that 2, after judging the packet that a use isolation information that enters identifies respectively, so at least additional transmission channel that provides can be provided access node.
3, according to the method for claim 1, it is characterized in that if in a definite duration scope, the packet that does not use business information to identify respectively enters access node, and judge that at least one additional like this transmission channel that provides is provided access node so.
According to any method in the above claim, it is characterized in that 4, such business information is included in the bit pattern of head part of such packet.
According to the method for claim 4, it is characterized in that 5, the number with the additional transmission channel that provides is provided such bit pattern.
6, according to any method in the claim 1 to 3, it is characterized in that, by the such business information of the data packet transmission with unique signaling capability.
According to any method in the above claim, it is characterized in that 7, a packet that uses business information to identify respectively can reduce the danger that the additional transmitted channel is provided.
CN99810191A 1998-08-27 1999-08-26 Method for controlling the provision of at least one additional transmission channel as access to a packet switching network Expired - Fee Related CN1114299C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19839020.3 1998-08-27
DE19839020 1998-08-27

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CN1315097A true CN1315097A (en) 2001-09-26
CN1114299C CN1114299C (en) 2003-07-09

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EP (1) EP1108311A2 (en)
CN (1) CN1114299C (en)
AR (1) AR025267A1 (en)
BR (1) BR9913283A (en)
WO (1) WO2000013369A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122422A1 (en) 2001-05-09 2002-11-21 Siemens Ag Method for adjusting bandwidth in a connection between two communications terminals in a data network allocates a transmission channel to the connection for transmitting data.
CA2461420A1 (en) * 2001-09-25 2003-04-03 Siemens Aktiengesellschaft Method for controlling features in packet-oriented communication systems

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AU4649296A (en) * 1994-12-29 1996-07-24 Jones International, Ltd. Method and system for two-way data transmission with secondary one-way circuit

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WO2000013369A3 (en) 2000-06-22
AR025267A1 (en) 2002-11-20
WO2000013369A2 (en) 2000-03-09
CN1114299C (en) 2003-07-09
EP1108311A2 (en) 2001-06-20
BR9913283A (en) 2001-05-15

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