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WO1998002992A1 - Systeme emulateur de protocole de signalisation de securite - Google Patents

Systeme emulateur de protocole de signalisation de securite Download PDF

Info

Publication number
WO1998002992A1
WO1998002992A1 PCT/SE1997/001008 SE9701008W WO9802992A1 WO 1998002992 A1 WO1998002992 A1 WO 1998002992A1 SE 9701008 W SE9701008 W SE 9701008W WO 9802992 A1 WO9802992 A1 WO 9802992A1
Authority
WO
WIPO (PCT)
Prior art keywords
protocol
signalling
frame
snmp
network
Prior art date
Application number
PCT/SE1997/001008
Other languages
English (en)
Inventor
Kim Laraqui
Original Assignee
Telia Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telia Ab filed Critical Telia Ab
Publication of WO1998002992A1 publication Critical patent/WO1998002992A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/28—Restricting access to network management systems or functions, e.g. using authorisation function to access network configuration
    • 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
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling
    • 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
    • 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
    • H04L2012/5619—Network Node Interface, e.g. tandem connections, transit switching
    • 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
    • H04L2012/5629—Admission control
    • H04L2012/563—Signalling, e.g. protocols, reference model

Definitions

  • the invention relates to a secure signalling protocol emulator system (SSPES) for an integrated services digital network (ISDN/BISDN), nn TSDN/BISDN including a S5PF. , nnri a method for secure signalling protocol emulation on a management protocol, such as SNMP.
  • SSPES secure signalling protocol emulator system
  • ISDN/BISDN integrated services digital network
  • nnri a method for secure signalling protocol emulation on a management protocol, such as SNMP.
  • the signalling protocol emulator on SNMP consists of a small layer between a Q931/Q2931 protocol, which is used for ISDN (Integrated Services Digital Network), or BISDN (Broadband ISDN) , user-to-network-interface signalling, and SNMP.
  • the signalling protocol emulator system (SPES) facilitates the deployment of a very economical protocol stack for exchange of signalling messages between users of ISDN/BISDN services and an operator providing such services. With SPES, the operator who provides the ISDN/BISDN service may implement a secure exchange of signalling information without deploying the standard and very complex signalling protocols that would otherwise be required.
  • a secure signalling protocol emulator system SSPES) can be deployed as a means to implement TINA connection management and a much more robust DAVIC/DSM-CC user-network configuration and session management.
  • SNMPv2 SNMP version 2 protocol data unit
  • PDU protocol data unit
  • an operator should give consideration to, and compare the merits of, the available protocol architectures.
  • the protocols required to be installed, by an operator, on local telephone exchanges and, by subscribers, on their CPEs (Customer Premises Equipments) should be compared against one another from a functional perspective.
  • ILMI Interim Local Management Interface
  • an operator could obtain distinct benefit from a solution in which signalling protocols can be deployed without adding to the already complex protocol configurations that yield from BISDN/ATM and from services such as Local Area Network (LAN) emulation, Video-On-Demand etc.
  • LAN Local Area Network
  • the systems solution which is the subject of the present invention will enable a smooth transition from pure signalling protocols to real- time object-oriented network management protocols, i.e. in line with TINA.
  • TINA departs frorr a totally uncorroborated approach for call management
  • SSPES secure signalling protocol emulator system
  • the present invention provides a secure signalling protocol emulator system for an integrated services digital network including a plurality of customer premises equipments for users of the network, a user network interface, a user-to-network-interface signalling protocol, and a network management protocol, characterised in that said system includes a protocol emulator overlaying said management protocol, said emulator being adapted to transform signalling frames generated by a customer premises equipment into management protocol operations.
  • the protocol emulator may be interposed between said signalling protocol and said management protocol.
  • the management protocol may be SNMP and the signalling protocol ma be a Q931/Q2931 protocol.
  • the protocol emulator may be adapted to transform UNI signalling frames, for example, UNI Q931/Q2931 signalling frames, into SNMP operations.
  • the protocol emulator may be adapted to transform IINI signalling frames into SNMP operations.
  • protocol emulator may be adapted to transtoim
  • the transformation yielding at least one table for each type of signalling message frame and at least one table for IEs.
  • the said at least one frame-table may be for a connect message, or an alert message, or any other message.
  • the said at least one IE-table and the said at least one frame-table may be related by means of internal indexes.
  • Each element of the said at least one IE-table may be indexed using an index number identical to a call reference value of a frame, frames relating to the same call being indexed by the same inder value.
  • the said at least one frame-table may be indexed by means of at least a call reference value, or by means of a call reference, a protocol discriminator, and an nid I _> IE-tables, which index may be used to index individual rows of said IE-tables that pertain to the message type of a particular call.
  • the said at least one frame-table may optionally include a further field to enable explicit commitment of a signalling message so that individual fields of the message can be written asynchronously.
  • a secure signalling protocol emulator system is provided for
  • ISDN/BISDN including a plurality of CPEs for users of the network, a user network interface, a Q931/Q2931 signalling protocol for user-to-network-interface signalling, and SNMP, characterised in that said system includes a protocol emulator overlaying SNMP, said emulator being interposed between said Q931/Q2931 signalling protocol and SNMP, and adapted to transform signalling frames generated by a CPE into SNMP operations.
  • the protocol emulator may be adapted to transform UNI Q931/Q2931 signalling frames, or NNI signalling frames, into SNMP operations. In the case of UNI
  • the transformation yields at least one frame- table for each type of signalling message frame and at least one IE-table for IEs, in which said at least one frame-table is for a connect message, or an alert message, in which said at least one IE-table and said at least one frame-table are related by means of internal indexes, in which each element of said at least one IE-table is indexed using an index number identical to a call reference value of a frame, frames relating to the same call being indexed by the same index value, and in which said at least one frame-table is indexed by means of at least a call reference, a protocol discriminator, and an index to IE-tables.
  • the invention further provides an integrated services digital network including a plurality of customer premises equipments for users of the network, a user network interface, a user-to-network-interface signalling protocol, a network management protocol, and a secure signalling protocol emulator system as claimed in any one of the preceding claims.
  • the network may be a broadband network.
  • the invention further provides, in an integrated services digital network including a plurality of customer premises equipments for users of the network, a user network interface, a user-to-network-interface signalling protocol, a network management protocol, a method for signalling protocol emulation on a management protocol using a secure signalling protocol emulator, characterised in that said method includes the step of transforming signalling frames, generated by a customer premises equipment, into management protocol operations using said protocol emulator.
  • the signal frame transformation step of the present invention may be effected by a protocol emulator interposed between said signalling protocol and said management protocol .
  • the management protocol may be SNMP, and the signalling protocol may be a Q931/Q2931 protocol.
  • the signal frame transformation step of the present invention may be used to transform UNI signalling frames, such as, UNI Q931/Q2931 signalling frames, into SNMP operations .
  • the signal frame transformation step of the present invention may be used to transform NNI signalling frames into SNMP operations.
  • the management protocol may be SNMP
  • the signal frame transformation may effect the transformation of UNI signalling into SNMP operations, said transformation yielding at least one table for each type of signalling message frame and at least one table for IEs.
  • the said at least one frame-table may be for a connect message, or an alert message, or any other message.
  • the said at least one IE-table and the said at least one frame-table may be related by means of internal indexes.
  • the method may include the steps of indexing each element of said at least one IE-table using an index number identical to a call reference value of a frame, and assigning the same index value to frames relating to the same call.
  • the method may include the step of indexing said at least one frame-table by means of at least a call reference value .
  • the method may include the step of indexing said at least one frame-table by means of a call reference, a protocol discriminator, and an index to IE-tables.
  • the index to IE-tables may be used to index individual rows of said IE-tables that pertain to the message type of a particular call.
  • the method may nclude the step of indexing said at least one frame-table to include a further field to enable explicit commitment of a signalling message so that individual fields of the message can be written asynchronously.
  • the method of the present invention may include the steps of:
  • a network SNMP sending, in response to said SNMP SetRequest, a confirmation, after which, a user signalling protocol emulator issues a commit request by setting a variable in a frame-table.
  • Figure 1 illustrates a secure signalling protocol emulator for SNMP (Simple Network Management Protocol), according to the present invention
  • Figure 2 illustrates mapping between ISDN/BISDN frames to SNMP SMI.
  • BISDN Broadband ISDN
  • IP Internet Protocol
  • MIB Management Information Base
  • MTP3 Message Transfer Part 3 of CCS
  • NICs Network Interface Cards
  • NNI Network Node Interface
  • OAM Operations, Administration and Maintenance
  • SSPES Secure Signalling Protocol Emulator System
  • TCS Telia City Service
  • TINA Telecommunication Information Network Architecture
  • T INA-C Telecommunication Information Network Architecture
  • the frame-tables being indexed by means of the call reference value and possibly other sub- indexes .
  • a SSPES for ISDN/BISDN, includes a plurality of CPEs for ISDN/BISDN users, a user network interface, a user- to-network-interface signalling protocol, a network management protocol, and a protocol emulator overlaying the management protocol, which is adapted to transform signalling frames generated by a CPE into management protocol operations.
  • the signalling protocol emulator is, in practice, interposed between a signalling protocol, i.e. a Q931/Q2931 protocol, and said management protocol, i.e. SNMP.
  • the manner in which SNMP secure table manipulation is effected is also outlined .
  • the system is in two parts, namely, a user domain and an operator domain.
  • a Q931/Q2931 protocol entity is provided on each side of the ISDN/BISDN User Network Interface (UNI), i.e. the Q931/Q2931 protocol entity 1 is provided on the user side, and the Q931/Q2931 protocol entity 2 is provided on the operator side.
  • An NNI-signalling unit 3 is associated with the Q931/Q2931 protocol entity 2.
  • the SPES systems solution allows the protocol entity to either work as before, i.e. the SPES is totally transparent to Q931/Q2931, or directly against SNMP. It should be noted that the first alternative enables SPES to interwork with a traditional Q2931 solution, i.e. an operator, such as Telia, could use SPES on its side of the UNI and still inter- operate with an AT&T UNI.
  • a signalling message frame for example, a CONNECT Message Frame
  • a transport/network mechanism specifically designed for signalling for example, SSCOP (Service Specific Connection Orientated Protocol), or SCCP (Signalling Connection and Control Part)/MTP3 (Message Transfer Part 3 of Common Channel Signalling (CCS)).
  • SSCOP Service Specific Connection Orientated Protocol
  • SCCP Signalling Connection and Control Part
  • MTP3 Message Transfer Part 3 of Common Channel Signalling (CCS)
  • CCS Common Channel Signalling
  • a signalling message frame is sent, as illustrated in Figure 1, on the user side, from Q931/Q2931 protocol entity 1 to SPES 4 and, on the operator side, from Q931/Q2931 protocol entity 2 to SPES 5.
  • the SPESs 4 and 5 respectively convert respective signalling message frames into a SNMP table manipulation command for the SNMPs 6 and 7 which are respectively connected to UDP
  • IP Internet Protocol
  • a Q2931 signalling message frame 10 is connected to a SPES 11.
  • the index to IE-tables is used to index individual rows of IE-tables pertaining to the message type of a particular call.
  • a CONNECT Frame consists of, among other things, a Bearer Capability IE
  • an entry will be created in the IE-table. It is not material to the present invention whether there is one single IE-table, with a different structure according to the TLV-method of specifying entries in a SNMP-table, or one table per IE- type .
  • the method of the present invention includes the steps of making an entry in an IE- table; converting the CMF into a set of objective identifiers (Olds) and values; sending the entire set of Olds and values, in the form of a list, in an SNMP SetRequest; a networi: SNMP sending, in response to said SNMP SetRequest, a confirmation, after which, a user signalling protocol emulator issues a commit request by setting a variable in a frame-table.
  • CMF CONNECT Message Frame
  • Bearer Capability IE the method of the present invention includes the steps of making an entry in an IE- table; converting the CMF into a set of objective identifiers (Olds) and values; sending the entire set of Olds and values, in the form of a list, in an SNMP SetRequest; a networi: SNMP sending, in response to said SNMP SetRequest, a confirmation, after which, a user signalling protocol emulator issues a commit request
  • NNI exchanges will eventually lead to UNI signalling between a local exchange and the called CPE.
  • CPE UNI signalling
  • SSPES SSPES of the present invention
  • SSPES eliminates the need to use an entire protocol stack which has traditionally been regarded as absolutely necessary for signalling netwuil.s.
  • the present invention reuses network management protocols to implement the communication facilities for signalling message exchanges.
  • the SNMP-based solution is also new in its approach to offer an asynchronous object-oriented interface to UNI- signalling applications. For example, a Q2931 entity on one side of the UNI may issue incomplete signalling messages to the other side and later complement those messages with additional IE before committing the entire message to the peer SPES entity.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système émulateur de protocole de signalisation de sécurité pour un réseau numérique à service intégré comprenant plusieurs équipements dans les locaux de clients pour des utilisateurs du réseau, une interface utilisateur/réseau, un protocole de signalisation d'interface utilisateur-à-réseau et un protocole de gestion de réseau, ce système se caractérisant en ce que l'émulateur de protocole est superposée au protocole de gestion (p. ex. SNMP), l'émulateur étant adapté pour transformer les trames de signalisation (p. ex. trames de signalisation UNI) générées par un équipement se trouvant dans les locaux d'un client au cours d'opérations de protocole de gestion. L'émulateur de protocole est interposé de préférence entre le protocole de signalisation (p. ex. un protocole Q931/Q2931) et le protocole de gestion.
PCT/SE1997/001008 1996-07-15 1997-06-10 Systeme emulateur de protocole de signalisation de securite WO1998002992A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602774A SE515055C2 (sv) 1996-07-15 1996-07-15 Ett säkert signalprotokollemulatorsystem
SE9602774-3 1996-07-15

Publications (1)

Publication Number Publication Date
WO1998002992A1 true WO1998002992A1 (fr) 1998-01-22

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PCT/SE1997/001008 WO1998002992A1 (fr) 1996-07-15 1997-06-10 Systeme emulateur de protocole de signalisation de securite

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SE (1) SE515055C2 (fr)
WO (1) WO1998002992A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999041936A1 (fr) * 1998-02-13 1999-08-19 British Telecommunications Public Limited Company Procede et systeme de demande d'un circuit virtuel via un reseau de commutation par paquets

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062108A (en) * 1989-09-29 1991-10-29 At&T Bell Laboratories ISDN codeset conversion
EP0533407A2 (fr) * 1991-09-18 1993-03-24 International Business Machines Corporation Coordination d'une transaction hétérogène
WO1997018681A1 (fr) * 1995-11-16 1997-05-22 Nokia Telecommunications Oy Interfonctionnement de gestion de mobilite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5062108A (en) * 1989-09-29 1991-10-29 At&T Bell Laboratories ISDN codeset conversion
EP0533407A2 (fr) * 1991-09-18 1993-03-24 International Business Machines Corporation Coordination d'une transaction hétérogène
WO1997018681A1 (fr) * 1995-11-16 1997-05-22 Nokia Telecommunications Oy Interfonctionnement de gestion de mobilite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SIEMENS TELECOM REPORT INTERNATIONAL, November 1992, Vol. 15, MAX SEVCIK, "Adaptable TMN: A New Dimension in Practical Network Management", pages 34-38. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999041936A1 (fr) * 1998-02-13 1999-08-19 British Telecommunications Public Limited Company Procede et systeme de demande d'un circuit virtuel via un reseau de commutation par paquets

Also Published As

Publication number Publication date
SE515055C2 (sv) 2001-06-05
SE9602774D0 (sv) 1996-07-15
SE9602774L (sv) 1998-01-16

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