EP1464188A1 - Partage de code de point s maphore dans des centraux t l phoniques - Google Patents

Partage de code de point s maphore dans des centraux t l phoniques

Info

Publication number
EP1464188A1
EP1464188A1 EP02806015A EP02806015A EP1464188A1 EP 1464188 A1 EP1464188 A1 EP 1464188A1 EP 02806015 A EP02806015 A EP 02806015A EP 02806015 A EP02806015 A EP 02806015A EP 1464188 A1 EP1464188 A1 EP 1464188A1
Authority
EP
European Patent Office
Prior art keywords
network
vst
internal logical
internal
network node
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02806015A
Other languages
German (de)
English (en)
Inventor
Manfred Angermayr
Walter Held
Helmut Richter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Siemens AG
Nokia Siemens Networks GmbH and Co KG
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 Siemens AG, Nokia Siemens Networks GmbH and Co KG filed Critical Siemens AG
Publication of EP1464188A1 publication Critical patent/EP1464188A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling

Definitions

  • the present invention relates to a network node or a switching center and a method for adding switching centers in a communication network which have the same signaling point code as other switching centers in the communication network.
  • Telecommunications networks consist of a large number of switching centers (nodes), which in turn can form individual networks with the subscribers connected to them.
  • information or signaling is transmitted between the switching centers in parallel with the actual user data, essentially between devices from which signaling originates or ends (signaling end point, SEP) and devices which serve to connect signaling end points ( Signaling transfer points, STP and signaling lines).
  • Each signaling point such as A switching center (node) is clearly identified in the network by a signaling point code (SPC).
  • SPC signaling point code
  • the exchanges forward incoming messages on the basis of routing tables in which all possible destination signaling points and the signaling paths to be used are entered. It is clear here that a change in a signaling point code (SPC) of a switching center must be communicated to all relevant switching centers in the network.
  • the object on which the invention is based is to specify a switching center or a method for adding switching centers in a communication network, with which changes in relevant switching centers, which are necessary due to the addition or removal of switching centers in the network, can be avoided.
  • Two internal logical networks are thus set up in one switching center and a signaling connection is established from the second internal logical network to another switching center of the telecommunications network, via which all signaling of the other switching center takes place. It is possible here that both switching centers can have the same signaling point code, since only one switching center can be recognized on the network side. If switching centers are added or removed, network changes are no longer necessary. Participants and other connections (trunks) can be switched between the two exchanges without having to change the signaling environment.
  • the method can be applied both to a new switching center to be added as well as to an existing (old) switching center.
  • the second internal network is used exclusively to connect the original or the new exchange.
  • the inventive switching center is connected to the signaling network via the first internal network.
  • the switching center coupled to the second internal network can communicate with the signaling network by means of a logical communication connection between the first and second internal networks.
  • a signaling point code different from the exchange can be assigned to the second internal logical network, since this is only visible from the exchange coupled to the second internal logical network. If the method is applied to a switching center to be added, a signaling point code which is already known to the other (old) switching center can be assigned to the second internal logical network. This reduces the expenses in the old exchange.
  • calls to the "outside" arriving at the switching center coupled to the second internal logical network can be forwarded.
  • the switching center coupled to the second internal logical network sent route set test messages are answered with the routing information from the first internal logical network.
  • overload messages arriving from the network at the first internal logical network are also sent to the switching center coupled to the second internal logical network. Since both switching centers in the network can only be recognized as one switching center, the switching center congestion test messages sent in response to the overload message are blocked by the switching center coupled to the second internal logical network.
  • further internal logic networks analogous to the first and second internal logic networks can be formed in pairs in the exchange, each internal logic network being able to be assigned to a pair by means of a table or a mathematical algorithm.
  • a third internal logical network is set up in addition to the second internal logical network, from which a second signaling connection to the other switching center exists analogously to the second internal logical network. Messages sent from the telecommunications network to the other switching center and arriving in the first internal logical network are assigned to the second internal logical network or the third internal logical network for forwarding by means of a mathematical algorithm.
  • 5 shows a further example of the assignment of the connections to increase the signaling bandwidth in the switching center according to the invention and 6a to 6d an example of adding the exchange according to the invention.
  • the present invention is described using the example of the signaling system 7 (Signaling System No 7, SS7), which modalities and information content of the signaling between network nodes (switching centers) agreed and is increasingly used in telecommunications networks.
  • SS7 Signaling System No 7, SS7
  • the basis of the architecture of the signaling system 7 is the message transfer part (MTP). It establishes a connection between two neighboring signaling points and ensures fail-safe transmission of the control information between them.
  • MTP message transfer part
  • Various user parts are set up on the message transmission part, which establish virtual “end-to-end” connections between the originating switching center and the target switching center.
  • each signaling point is uniquely identified by a 14 bit (ITU-T) or 24 bit (ANSI) long signaling point code.
  • Each message contains both the signaling point code of the originating point code (OPC) and the destination signaling point (Destination Point Code, DPC).
  • OPC originating point code
  • DPC Destination Point Code
  • the switching center A-Vst can be the new switching center to be added, the Existing exchange B-Vst is adapted according to the invention, or exchange A-Vst already exists and exchange B-Vst is added.
  • two internal logical networks N1 and N2 are set up in the exchange B-Vst.
  • All the signaling routes of the switching center A-Vst to the nodes in the signaling network are assigned to the network NI.
  • a signaling path S1 is set up between the switching center A-Vst and the network N2 of the switching center B-Vst in order to continue to give the switching center A-Vst access to the signaling network.
  • the ISUP ISDN User Part
  • CIC Circuit Identification Code
  • FIG. 2a shows this using the example of a message 1 sent from the switching center A-Vst to the switching center C-Vst.
  • message 1 is transmitted using the MTP
  • Fig. 2b shows the process in the opposite direction. All ISUP messages 2 sent from the SS7 network with the target
  • the corresponding trunk group is known in this example since it has already been partially converted from the switching center A-Vst to the network N1 of the switching center B-Vst.
  • the trunks with the CIC values q have not yet been set up on the exchange B-Vst.
  • the exchange B-Vst then does not trigger an error message (Unequipped Circuit Identification Code, UCIC) as would be usual in such a case, but forwards the message 2 with the routing database from network 2 to the exchange A-Vst. That is, all the messages 2 arriving in the network N1 and addressed to the switching center B-Vst are simply forwarded to the network N2 if the messages 2 cannot be assigned.
  • UCIC Unequipped Circuit Identification Code
  • ISUP trunks between the exchanges A-Vst and B- Vst to set up, and to forward these incoming calls to the exchange A-Vst. This is referred to as “re-routing”.
  • the ISUP trunks are also used as connecting lines for calls between participants in the switching centers A-Vst and B-Vst. The signaling for this is carried out via the internal network N2, ie in the switching center B. -Vst these ISUP trunks are assigned their own point code 112.
  • SCCP Signaling Connection Control Part
  • a new switching center B-Vst can be tested with part of the load before the switchover takes place. Furthermore, it can be useful for reasons of cost to keep the old exchange A-Vst with the existing line cards. These two applications are shown in Fig. 3a and b. While in FIG. 3a, after a transition phase II, the old switching center A-Vst is replaced by the new switching center B-Vst in step III, as shown in FIG. 3b, the new switching center B-Vst is replaced with new or . Extended features of the existing exchange A-Vst added.
  • Fig. 4 shows a further embodiment of the switching center B-Vst according to the invention in a network section.
  • Twenty internal logical networks N1..N20 are set up in the switching center B-Vst, the networks N1..N20 being assigned to one another in pairs N1-N20, N2-N19, ...
  • This assignment can be represented, for example, in the form of a table T in the switching center B-Vst.
  • the operations during data transmission in each network pair N1-N20, N2-N19, ... are analogous to those described in FIGS. 1 and 2.
  • the messages arriving from a switching center (not shown) in the network N3 are forwarded to the network N18 without an error message by means of the table T if the addresses of the messages are not known to the network N2.
  • the message is sent from the network N18 to the switching center (not shown) coupled to the network N18.
  • reverse Messages arriving in the network N18 are forwarded to the network N3 using the table T.
  • an assignment takes place in the exchange B-Vst between the network N1 and the network N2 or N3 by means of a mathematical algorithm.
  • the messages arriving in the network Nl from the signaling connections S2 .. S3 and relating to the switching center A-Vst are forwarded to the network N2 or N3 by means of a mathematical algorithm.
  • the messages arrive from the network N2 and N3 via the signaling connection Sla or Slb to the switching center A-Vst.
  • the signaling bandwidth between the exchanges A-Vst and B-Vst can be increased.
  • FIG. 6a shows an example of the procedure for adding a new exchange B-Vst according to the invention.
  • the exchange B-Vst contains new features and is to be added to the exchange A-Vst.
  • the networks N1 and N2 are set up in the new switching center B-Vst.
  • the signaling connection S2 and the trunk group TGx exist between the switching centers C-Vst and A-Vst.
  • a signaling connection S1 is set up between the new switching center B-Vst and the switching center A-Vst (FIG. 6a) and the signaling connection S2 between the switching centers C-Vst and A-Vst from the switching center A-Vst to the new switching center B-Vst changed (Fig. 6b).
  • a part TGa, TGb of the trunk group TGx (unused or blocked trunks) is then redirected between the switching centers C-Vst and A-Vst to the new switching center B-Vst (FIG. 6c).
  • the method according to the invention can also be applied to already existing exchanges A-Vst.
  • two internal networks N1, N2 are set up in the switching center, all existing connections and subscribers being assigned to one network N1 and the coupling of a new switching center A-Vst using the other network N2.
  • connections and subscribers can then be converted from the network N1 of the existing switching center B-Vst to the new switching center A-Vst.
  • the term switching center generally means every signaling network node SNK (STP, SRP, SEP) in a telecommunications network.
  • SNK signaling network node
  • SRP station
  • SEP signaling network node
  • the cases are included in which there are no SS7-signaled trunks (e.g. ISUP).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un noeud de réseau, ainsi qu'un procédé pour l'ajout dans un réseau de communication d'un noeud de réseau ou d'un central téléphonique pouvant avoir le même code de point sémaphore qu'un autre central téléphonique dans le réseau de communication. Selon l'invention, on constitue deux réseaux logiques internes (N1, N2) dans un central téléphonique (B-Vst) du réseau de télécommunication et on établit une liaison sémaphore (S1) allant du deuxième réseau logique interne (N2) à un autre central téléphonique (A-Vst) du réseau de télécommunication. L'invention est caractérisée en ce que toutes les signalisations de l'autre central téléphonique (A-Vst) se font par l'intermédiaire de cette liaison sémaphore et en ce que les deux centraux téléphoniques (A-Vst, B-Vst) présentent le même code de point sémaphore SPCx.
EP02806015A 2002-01-09 2002-12-05 Partage de code de point s maphore dans des centraux t l phoniques Withdrawn EP1464188A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10253782 2002-01-09
DE10253782A DE10253782A1 (de) 2002-01-09 2002-01-09 Signalisierungspunktcode-Teilung in Vermittlungsstellen
PCT/DE2002/004468 WO2003058982A1 (fr) 2002-01-09 2002-12-05 Partage de code de point sémaphore dans des centraux téléphoniques

Publications (1)

Publication Number Publication Date
EP1464188A1 true EP1464188A1 (fr) 2004-10-06

Family

ID=7715047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02806015A Withdrawn EP1464188A1 (fr) 2002-01-09 2002-12-05 Partage de code de point s maphore dans des centraux t l phoniques

Country Status (4)

Country Link
US (1) US20050163113A1 (fr)
EP (1) EP1464188A1 (fr)
DE (1) DE10253782A1 (fr)
WO (1) WO2003058982A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE502005002654D1 (de) * 2005-03-09 2008-03-13 Nokia Siemens Networks Gmbh Verfahren zum Vermitteln von SS7-Nachrichten, Netzwerkanordnung sowie Netzwerkelement
CA2642967A1 (fr) * 2006-03-16 2007-09-27 Sonus Networks, Inc. Utilisation d'un code de point unique pour representer plusieurs dispositifs de commutation
US8571043B2 (en) 2006-03-16 2013-10-29 Sonus Networks, Inc. Using a single point code to represent multiple switching devices
US7853004B2 (en) * 2006-03-16 2010-12-14 Sonus Networks, Inc. Active switch replacement using a single point code
CN108600565B (zh) * 2018-04-24 2021-04-20 深圳震有科技股份有限公司 多台pbx共享ss7信令点的网络系统、方法及交换机

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US5048081A (en) * 1989-12-28 1991-09-10 At&T Bell Laboratories Arrangement for routing packetized messages
FI98261C (fi) * 1994-05-24 1997-05-12 Nokia Telecommunications Oy Menetelmä kehäväylöityksen estämiseksi tietoliikenneverkossa
US5737404A (en) * 1996-04-04 1998-04-07 Motorola, Inc. Distributed signaling system seven call handling system
US5680437A (en) * 1996-06-04 1997-10-21 Motorola, Inc. Signaling system seven distributed call terminating processor
JP2853662B2 (ja) * 1996-06-18 1999-02-03 日本電気株式会社 移動ホスト対応ネットワーク
US6449278B2 (en) * 1996-10-29 2002-09-10 Nortel Networks Limited Exchange for communication network
US6314109B1 (en) * 1998-01-30 2001-11-06 Nortel Networks Limited Method and apparatus for adding or augmenting a network node
US6529499B1 (en) * 1998-09-22 2003-03-04 Lucent Technologies Inc. Method for providing quality of service for delay sensitive traffic over IP networks
AU2024300A (en) * 1998-12-01 2000-06-19 Thor Simon Improved signaling system for telecommunications
DE19901204C2 (de) * 1999-01-14 2001-02-01 Siemens Ag Verfahren zur Realisierung von Mehrfach-Punktcodes in einer Vermittlungsstelle
GB2349542B (en) * 1999-04-30 2003-10-15 Ericsson Telefon Ab L M Telecommunications network congestion
US6823061B2 (en) * 2001-12-20 2004-11-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and system using SS7 signaling control connection part (SCCP) in a distributed network having shared point codes

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Also Published As

Publication number Publication date
WO2003058982A1 (fr) 2003-07-17
DE10253782A1 (de) 2003-11-13
US20050163113A1 (en) 2005-07-28

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