WO2004107774A1 - Methode de distribution de trafic de reseau dans un systeme de communication mobile - Google Patents

Methode de distribution de trafic de reseau dans un systeme de communication mobile Download PDF

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Publication number
WO2004107774A1
WO2004107774A1 PCT/KR2004/001310 KR2004001310W WO2004107774A1 WO 2004107774 A1 WO2004107774 A1 WO 2004107774A1 KR 2004001310 W KR2004001310 W KR 2004001310W WO 2004107774 A1 WO2004107774 A1 WO 2004107774A1
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WO
WIPO (PCT)
Prior art keywords
signaling
links
routes
link
switching center
Prior art date
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Ceased
Application number
PCT/KR2004/001310
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English (en)
Inventor
Hyun Young Shin
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.)
UTStarcom Korea Ltd
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UTStarcom Korea Ltd
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Filing date
Publication date
Application filed by UTStarcom Korea Ltd filed Critical UTStarcom Korea Ltd
Publication of WO2004107774A1 publication Critical patent/WO2004107774A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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 method of managing a network when the state of a No. 7 network changes in a mobile communication switching center. More particularly, the present invention, which is related to a method of managing a network when the state of a No. 7 network changes in a mobile communication switching center, enables the network to be stabilized by adjusting network traffic between signaling links according to changes in the network state when signaling links are switched and restored, or when a control-rerouting operation changes.
  • each signaling route to a specific signaling point has 16/N (N is the number of the signaling routes) Signaling Link Selection (SLS) bits. This is irrespective of the number of signaling links within a signaling link set of a signaling route. Since a network is designed based on the network traffic in a stable state and the network traffic varies widely by each of the signaling links during the time of a change in the network state (e.g., when a signaling link switching/restoration or a control-rerouting occurs), it is hard to design a network in consideration of the above.
  • N is the number of the signaling routes
  • SLS Signaling Link Selection
  • the traffic assigned to the corresponding link set should be transferred using the single restored signaling link.
  • the traffic assigned to a link set should be transferred using a small number of signaling links. If the signaling links cannot sustain such traffic, then additional signaling link switching or congestion may occur at the time the network state changes (e.g., a signaling link switching/restoration or a control-rerouting in the No. 7 protocol). Accordingly, the present invention is directed to resolving the above problems associated with the prior art.
  • the object of the present invention is to provide a method for managing a network, which prevents congestion by ensuring that the network traffic does not vary greatly between each of the signaling links by adjusting SLS bits assigned to each signaling routes.
  • the SLS bits are assigned according to the number of signaling links in each link set at the time of control- rerouting, thereby minimizing message loss.
  • another object of the present invention is to provide a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center, which improves stability during network state changes. Stability is improved by mitigating load differences between signaling links by adjusting SLS bits between signaling routes according to the number of signaling links in each of the link sets. Stability can be also improved by distributing the SLS bits in each of the link sets during signaling link switching or restoration.
  • a method of distributing traffic uniformly at the time of control-rerouting in a mobile communication switching center including a Message Transfer Part 3 (MTP3) message processing block comprises the steps of: at the MTP3 message processing block within the switching center, receiving a signal with information that the state of a first signaling link within a link set has changed to available; at the MTP3 message processing block within the switching center, selecting a signaling route from the link set; at the MTP3 message processing block within the switching center, calculating the number of signaling links within the link set, wherein said link set comprises signaling routes; at the MTP3 message processing block within the switching center, determining whether or not signaling links within each of the signaling routes are well-distributed; if the signal links within each of the signaling routes are not well-distributed, at the MTP3 message processing block within the switching center, assigning to each of the signaling routes Signaling Link Selection (SLS) bits in accordance with the number of signaling links
  • SLS Signaling Link Selection
  • a method of distributing traffic uniformly at the time of signaling link switching or restoration in a mobile communication switching center including a Message Transfer Part 3 (MTP3) message processing block comprises the steps of: at the MTP3 message processing block within the switching center, receiving a signal with information that the state of a first signaling link within a link set has been switched or restored; at the MTP3 message processing block within the switching center, selecting a signaling route from the link set; at the MTP3 message processing block within the switching center, calculating the number of signaling links within the link set, wherein said link set comprises signaling routes; at the MTP3 message processing block within the switching center, determining whether or not signaling links within each of the signaling routes are well-distributed; if the signal links within each of the signaling routes are not well-distributed, at the MTP3 message processing block within the switching center, assigning to each of the signaling routes Signaling Link Selection (SLS) bits in accordance with the number
  • SLS Signaling Link Selection
  • Fig. 1 is a schematic diagram that illustrates a load state of signaling routes and signaling links between STPs in a normal state according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center.
  • Fig. 2 is a schematic diagram that illustrates a load distribution across signaling routes when a link set changes to unavailable or available according to a conventional method for managing a network.
  • Fig. 3 is a schematic diagram that illustrates load differences across signaling links within a link set in the case of a load distribution in Fig. 2.
  • Fig. 4 is a schematic diagram that illustrates a load distribution after a control-rerouting improvement is applied according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center in accordance with an embodiment of the present invention.
  • Fig. 5 is a schematic diagram that illustrates a state after loads are distributed in accordance with the number of signaling links after a control-rerouting improvement is applied in Fig. 4.
  • Fig. 6 is a flow chart that illustrates a control-rerouting in a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center in accordance with an embodiment of the present invention.
  • Fig. 7 is a schematic diagram that illustrates switching and restoring of signaling links within a link set according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center in accordance with an embodiment of the present invention.
  • Fig. 1 is a schematic diagram that illustrates a load state of signaling routes and signaling links between STPs in a normal state according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center.
  • Fig. 1 load distribution across signaling routes and signaling links is shown when the network is in a normal state and there is no change in a network state. It is assumed that each signaling link set has four signaling links. In the upper figure of Fig. 1, there are two signaling routes from a signaling point SP1 to a signaling point SP2, and eight SLS bits are assigned to each signaling routes. The lower figure of Fig 1 illustrates a load distribution across signaling links within a link set, which comprises signaling routes, and two SLS bits are assigned to each signaling link.
  • Fig. 2 is a schematic diagram that illustrates a load distribution across signaling routes when a link set changes to unavailable or available according to a conventional method for managing a network.
  • Fig. 3 is a schematic diagram that illustrates a load difference across signaling links within a link set when loads are distributed according to Fig. 2.
  • Fig. 2 illustrates that SLS bits are assigned to each signaling routes when a link set to an adjacent signaling point (STP1) is changed to unavailable and then changed back to available. Looking at the traffic between the signaling routes, the SLS bits pour into one signaling route when the link set is changed to unavailable. Then, the traffic is distributed equally to both signaling routes after the link set is changed back to available.
  • STP1 adjacent signaling point
  • Fig. 4 is a schematic diagram that illustrates a load distribution after a control-rerouting improvement is applied according to a method for managing a network when the state of a No.
  • Fig. 5 is a schematic diagram that illustrates a state after loads are distributed in accordance with the number of signaling links after a control-rerouting improvement is applied in Fig. 4.
  • Fig.5 signal links within a link set of a route, which is changed to available, are restored and unbalances between signal links are minimized by flexibly controlling SLS bits assigned to each signaling route whenever signaling links are restored.
  • Fig. 6 is a flow chart that illustrates a control-rerouting according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center in accordance with an embodiment of the present invention.
  • MTP3 message processing block 102 within switching center 100 receives a signal with information that the state of a first signaling link within a link set has changed to available (SI).
  • SI available
  • MTP3 message processing block 102 within switching center 100 selects a signaling route from the link set (S2).
  • S2 signaling route from the link set
  • MTP3 message processing block 102 within switching center 100 calculates the number of signaling links within the link set, wherein said link set comprises signaling routes (S3).
  • MTP3 message processing block 102 within switching center 100 determines whether or not signaling links within each of the signaling routes are well-distributed (S4).
  • MTP3 message processing block 102 within switching center 100 assigns to each of the signaling routes Signaling Link Selection (SLS) bits in accordance with the number of signaling links within each of the signaling routes (S5). MTP3 message processing block 102 within switching center 100 determines whether the step of distributing the SLS bits has been performed for all signaling routes within link sets (S6). If the step of distributing the SLS bits has not been performed for all signaling routes, the step of selecting a signaling route within a link set is performed (S7). If signaling links within each of the signaling routes are well-distributed,
  • SLS Signaling Link Selection
  • MTP3 message processing block 102 within switching center 100 assigns SLS bits of the normal state to each of the signaling routes. Otherwise, it continues a restart process for an adjacent signaling point or a corresponding signaling point (S8).
  • Fig. 7 is a schematic diagram that illustrates switching and restoring of signaling links within a link set according to a method for managing a network when the state of a No. 7 network changes in a mobile communication switching center in accordance with an embodiment of the present invention.
  • MTP3 message processing block 102 within switching center 100 receives a signal with information that the state of a first signaling link within a link set has been switched or restored (SI 1).
  • MTP3 message processing block 102 within switching center 100 selects a signaling route from the link set (S12).
  • MTP3 message processing block 102 within switching center 100 calculates the number of signaling links within the link set, wherein said link set comprises signaling routes (SI 3).
  • MTP3 message processing block 102 within switching center 100 determines whether or not signaling links within each of the signaling routes are well-distributed (SI 4).
  • MTP3 message processing block 102 within switching center 100 assigns to each of the signaling routes Signaling Link Selection (SLS) bits in accordance with the number of signaling links within each of the signaling routes (S 15). MTP3 message processing block 102 within switching center 100 determines whether the step of assigning the SLS bits has been performed for all signaling routes within link sets (SI 6). If the step of assigning the SLS bits has not been performed for all signaling routes, the step of selecting a signaling route within a link set is performed (S 17).
  • SI 6 Signaling Link Selection
  • MTP3 message processing block 102 within switching center 100 assigns SLS bits of the normal state to each of the signaling routes. Otherwise, it continues control- rerouting and a switching/restoring operation for signaling links in the remaining links sets (SI 8).

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

Abstract

Dans l'état de la technique, un centre de commutation distribue un trafic de réseau en fonction du trafic de routes de signalisation comprenant une pluralité de liens de signalisation. Etant donné que la manière classique de distribution de trafic de réseau ne prend pas en compte l'état de liens de signalisation individuels dans une route de signalisation, et que le trafic de réseau occupe en fait des liens de signalisation, il s'avère qu'une route de signalisation peut connaître un fort trafic. Il peut en résulter une perte de message, au cas où la route de signalisation contient au moins un lien de signalisation défaillant. Toutefois, puisque le centre de commutation de l'invention distribue le trafic de réseau en fonction du nombre de liens de signalisation disponibles, on peut s'attendre à ce que le problème susmentionné soit éliminé.
PCT/KR2004/001310 2003-06-02 2004-06-02 Methode de distribution de trafic de reseau dans un systeme de communication mobile Ceased WO2004107774A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0035283 2003-06-02
KR1020030035283A KR20040103666A (ko) 2003-06-02 2003-06-02 이동통신 교환기에서의 ｎｏ.7 망 상태 변경시의 망관리방법

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WO2004107774A1 true WO2004107774A1 (fr) 2004-12-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009043384A1 (fr) * 2007-10-05 2009-04-09 Telefonaktiebolaget Lm Ericsson (Publ) Partage de charge dans des réseaux de signalisation ss7 ou sctp

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010028091A (ko) * 1999-09-17 2001-04-06 서평원 넘버 세븐 신호망에서 신호 트래픽 부하 분담 방법
KR20020000653A (ko) * 2000-06-27 2002-01-05 서평원 신호망의 효율적인 트래픽 관리방법
US6515985B2 (en) * 2000-02-08 2003-02-04 Airslide Systems Ltd. Convergence of telephone signaling, voice and data over a packet-switched network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010028091A (ko) * 1999-09-17 2001-04-06 서평원 넘버 세븐 신호망에서 신호 트래픽 부하 분담 방법
US6515985B2 (en) * 2000-02-08 2003-02-04 Airslide Systems Ltd. Convergence of telephone signaling, voice and data over a packet-switched network
KR20020000653A (ko) * 2000-06-27 2002-01-05 서평원 신호망의 효율적인 트래픽 관리방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009043384A1 (fr) * 2007-10-05 2009-04-09 Telefonaktiebolaget Lm Ericsson (Publ) Partage de charge dans des réseaux de signalisation ss7 ou sctp

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