CN100484110C - Method and apparatus for switching signaling link - Google Patents
Method and apparatus for switching signaling link Download PDFInfo
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- CN100484110C CN100484110C CNB2006100351925A CN200610035192A CN100484110C CN 100484110 C CN100484110 C CN 100484110C CN B2006100351925 A CNB2006100351925 A CN B2006100351925A CN 200610035192 A CN200610035192 A CN 200610035192A CN 100484110 C CN100484110 C CN 100484110C
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Abstract
The invention discloses a method of handle the switch of signaling Link in signaling network, to solve the problem that the signaling gateway can not automatically switch signaling link in existing signaling network. The said method comprises steps: detect whether the signaling link is on the switching condition; adjust priority of signaling link according to detecting results; switch the signaling link according to the adjustment. Meanwhile, the invention also discloses a signaling link switching equipment in signaling network, comprising: signaling transmission modules, priority adjusting module, link detecting modules and signaling interface.
Description
Technical field
The present invention relates to a kind of communication system, relate in particular to the signaling transfer network in a kind of communication system, more exactly, the present invention relates to the switching processing of signaling link in the signaling network.
Background technology
At present, Quan Qiu communication network mainly can be divided into the Circuit Switching Network and the packet switching network.Different nets will be by optimum orientation independence evolution separately, fusion development, however final trend is to realize two net unifications, promptly based on the packetizing net of IP, i.e. and next generation network (NGN, Next Generation Network).
The switching network of NGN mainly is based on the soft switch of IP grouping, PSTN (the Public Switched Telephone Network that makes the networking of original difference, public switched telephone network), data network and mobile network be able to real fusion, the user who inserts by various terminals can enjoy unified business.In the process of construction of next generation network, the problem that we must face is exactly how to realize and existing disparate networks, as PSTN, mobile network is seamless interconnects.What realize that the intercommunication of telecommunication service at first will solve is exactly signalling interworking, and SGW (SG Signaling Gateway) is exactly a signalling interworking equipment between two different communication networks.Can realize signalling interworking between the different communication networks by SGW.
The major function of the SGW in the switching network of future generation is that the edge for traditional Common Channel Signaling Network (mainly being the NO.7 signaling network) and IP network receives and sends signaling message Xin Lingdaili is provided, and signaling message is carried out relaying, translation or finalization process.Its essence is traditional common channel signalling protocol conversion is become to be carried on SIGTRAN (Signaling Transport on the IP, signaling is transmitted) agreement, wherein SIGTRAN is IETF (InternetEngineering Task Force, Internet task group) a working group, its task is to set up one to be enclosed within the agreement that transmits pstn signaling on the IP network.SGW is transferred or protocol conversion to call signaling in real time at the edge of No.7 signaling network and IP network, and therefore, SGW can provide diversified application in calling out control, intelligent network and mobile network.
Yet according to the regulation of SIGTRAN, only receiving the activation message that ASP (Application ServerProcess, application server process) side sends, SG could arrive activated state with the ASP state transition of oneself preserving; Only be in the ASP of activated state, SG just can send message to corresponding SIGTRAN link.Therefore in the SIGTRAN link group of the some narrow band links of service, using which SIGTRAN link transmitting signaling message, do not use which link transmitting signaling message, is by the activation message decision of ASP side.If the ASP side does not send deexcitation message, then share under the pattern at general applied load, SG can't abandon this link.
With reference to figure 2, illustrate the illustration that existing SGW is used, when ASP operates in MGC (MediaGateway Controller, Media Gateway Controller) on, SG1 is embedded in MG (Media Gateway, media gateway) under 31 the situation, if MG31 support MGC's is dual-homed, then for the IUA link, perhaps LAPV5/V5UA link, perhaps DPNSS/DUA link is when MGC34 breaks down, MG31 should switch to MGC35 according to agreement H.248 when H.248 protocol registration is to MGC35.Because these signaling links are logically bound with MG31, MG is by which MGC control, and which MGC their signaling message just should be handled by.General hand-off process flow process is the ASP32 of MGC34 deexcitation to the SIGTRAN signaling link correspondence of oneself, and then signaling retransmission unit 101 stops to MGC34 transmitting signaling message; MGC35 is activated to the ASP33 of the SIGTRAN signaling link correspondence of oneself, and then signaling retransmission unit 101 is to MGC35 transmitting signaling message.Like this signaling message of narrowband side just have a correct forwarding flow to.But MGC always can not work in coordination with and finish above-mentioned switching.When the MGC34 of a fault fails deexcitation to the ASP32 of own link correspondence, will cause signaling message to continue, and it can not be handled to its forwarding; The MGC35 that should handle these message but can't receive these message.At this time just need be at the SG lateral root according to the H.248 protocol registration situation of MG handoff links voluntarily.
By last example as can be known, existing SG needs external equipment transmission activation or deexcitation message to decide the state of ASP, and go transmitting signaling message according to the ASP state of activation, cause when needs change signaling flow to the time, existence can't be abandoned former unavailable signaling link and be transformed into the problem of new available signaling link, the signaling link that can not automatically switch of the SGW in the promptly existing signaling network.
Summary of the invention
The object of the present invention is to provide a kind of method and relevant device of processing signaling link switchover in signaling network, to solve can not the automatically switch problem of signaling link of SGW in the existing signaling network.
An aspect of of the present present invention provides a kind of method of processing signaling link switchover in signaling network, comprises step: (a) survey signaling link and whether possess switching condition; (b) adjust the priority of signaling link according to result of detection; (c) according to adjusting hand off signaling link as a result.
Wherein, the switching condition in the described step (a) comprises signaling link failure, but has a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.Adjust signaling link priority in the described step (b) and comprise that the priority with former signaling link reduces, and increases the priority of new link connection.The hand off signaling link comprises and stopping to the low signaling link transmitting signaling message of priority in the described step (c), only to the highest signaling link transmitting signaling message of priority.
In the present invention, described signaling link is supported priority, and can specify the priority attribute of this signaling link by configuration.In the present invention, the priority of described signaling link can be this signaling link configuration when this signaling link of initialization.Wherein, described signaling link can be SIGTRAN (SignalingTransport, a signaling transmission) signaling link.
Method according to a kind of processing signaling link switchover in signaling network provided by the invention, all in the present invention signaling links all are in state of activation, no longer go transmitting signaling message according to the activation message of ASP side, all signaling links of the present invention all have priority attribute, have only the highest signaling link of priority just to be used for transmitting signaling message.Abandon signaling link when needs from one group and switch to another group during available signaling link, the priority of abandoning signaling link is reduced, increase the priority of described available signaling link, the available signaling link transmitting signaling message that priority is the highest like this, and can be not again to abandoning signaling link transmitting signaling message, thereby reach the purpose of automatic switchover.
Another aspect of the present invention provides a kind of equipment of processing signaling link switchover in signaling network, to solve can not the automatically switch problem of signaling link of SGW in the existing signaling network.
A kind of equipment of processing signaling link switchover in signaling network, described equipment comprises: signaling interface, be connected with at least one signaling link, be used for receiving or sending signaling message; The signaling retransmission unit couples with signaling interface, is used for transmitting signaling message;
Wherein, described equipment also comprises: the link detection unit, couple with the signaling retransmission unit, and be used to survey signaling link and whether possess switching condition; The priority adjustment unit couples with link detection unit and signaling retransmission unit, is used to adjust signaling link priority; Then described signaling retransmission unit also is used for according to the adjusted hand off signaling as a result of described priority adjustment unit link.
In the present invention, described priority adjustment unit adjustment signaling link priority comprises that the priority with former signaling link reduces, and increases the priority of new link connection.Described signaling retransmission unit also is used for according to the adjusted hand off signaling as a result of described priority adjustment unit link, comprises stopping to the low signaling link transmitting signaling message of priority, only to the highest signaling link transmitting signaling message of priority.The switching condition that described link detection unit is surveyed comprises signaling link failure, but has a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.
In the present invention, described signaling link is supported priority, and can specify the priority attribute of this signaling link by configuration.Described signaling link can be SIGTRAN (Signaling Transport, a signaling transmission) signaling link.
Wherein, the equipment of described processing signaling link switchover also comprises: the public administration unit, couple with signaling retransmission unit and priority adjustment unit, and be used to dispose the priority attribute of specifying this signaling link; Common interface couples with the public administration unit, is used for receiving or sending control, configuration information.
Described signaling retransmission unit also is used for the SIGTRAN signaling that will be converted to based on Circuit-switched common channel signalling based on the IP packet switching, and then described signaling interface comprises common channel signalling interface and IP signaling interface.
According to the equipment of a kind of processing signaling link switchover in signaling network provided by the invention, this equipment can be by the priority attribute of public administration unit configure signaling link.Signaling retransmission unit in the described equipment no longer goes transmitting signaling message according to the active information of A SP side, but according to the priority attribute transmitting signaling message of signaling link, has only the highest signaling link of priority just to be used for transmitting signaling message.Abandon signaling link when needs from one group and switch to another group during available signaling link, the priority of the signaling link abandoned is reduced, increase the priority of described available signaling link, the available signaling link transmitting signaling message that priority is the highest like this, and can be not again to abandoning signaling link transmitting signaling message, thereby reach the purpose of automatic switchover.
Other aspects of the present invention and advantage will the mode with preferred embodiment be described with reference to the accompanying drawings in embodiment.
Description of drawings Fig. 1 is the position of SGW of the present invention in network;
The illustration that Fig. 2 uses for existing SGW;
Fig. 3 is the overall flow of the method for processing signaling link switchover of the present invention;
The structured flowchart of a kind of equipment that provides among the present invention is provided Fig. 4;
The another structured flowchart of a kind of equipment that provides among the present invention is provided Fig. 5;
The illustration that Fig. 6 uses for the present invention;
Fig. 7 is the handling process of an illustration of the present invention's application.
Embodiment
Further set forth technical scheme of the present invention below in conjunction with accompanying drawing.
With reference to figure 1, illustrate the position of SGW in network.SGW 1 generally is in the edge of circuit-switched network 2, or the edge of IP packet switching network, is the interface of circuit-switched network 2 and IP packet switching network 3, and therefore, SGW 1 is in the centre of circuit-switched network 2 and IP packet switching network 3.
With reference to figure 3, illustrate of the present invention a kind of in signaling network the overall flow of the method for processing signaling link switchover.
In step 301, survey signaling link and whether possess switching condition; Wherein, described switching condition comprises signaling link failure, but has a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.
In step 302, according to the priority of result of detection adjustment signaling link, comprise that the priority with former signaling link reduces, increase the priority of new link connection.
In step 303, according to adjusting hand off signaling link as a result, comprise stopping, only to the highest signaling link transmitting signaling message of priority to the low signaling link transmitting signaling message of priority.It can when initialization the initial priority attribute of described signaling link configuration.
Method according to a kind of processing signaling link switchover in signaling network provided by the invention, all in the present invention signaling links all are in state of activation, no longer the active information according to the ASP side goes transmitting signaling message, all signaling links of the present invention all have priority attribute, have only the highest signaling link of priority just to be used for transmitting signaling message.Abandon signaling link when needs from one group and switch to another group during available signaling link, the priority of abandoning signaling link is reduced, increase the priority of described available signaling link, the available signaling link transmitting signaling message that priority is the highest like this, and can be not again to abandoning signaling link transmitting signaling message, thereby reach the purpose of automatic switchover.
With reference to figure 4, illustrate the structure of a kind of equipment among the present invention.Described equipment 1 comprises: signaling interface 104 is used for receiving or sending signaling message; Signaling retransmission unit 101 couples with signaling interface 104, is used for transmitting signaling message;
Wherein, equipment 1 also comprises: link detection unit 103, couple with signaling retransmission unit 101, and be used to survey signaling link and whether possess switching condition; Priority adjustment unit 102 couples with link detection unit 103 and signaling retransmission unit 101, is used to adjust signaling link priority.
In the present invention, described priority adjustment unit 102 adjustment signaling link priority comprise that the priority with former signaling link reduces, and increases the priority of new link connection.Described signaling retransmission unit 101 also is used for according to the adjusted hand off signaling as a result of described priority adjustment unit link, comprises stopping to the low signaling link transmitting signaling message of priority, only to the highest signaling link transmitting signaling message of priority.The switching condition of the single 103 yuan of detections of described link detection comprises signaling link failure, but has a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.
In the present invention, described signaling link is supported priority, and can specify the priority attribute of this signaling link by configuration.Described signaling link can be SIGTRAN (Signaling Transport, signaling is transmitted an agreement) signaling link.Described signaling retransmission unit also is used for the SIGTRAN signaling that will be converted to based on Circuit-switched common channel signalling based on the IP packet switching, and then described signaling interface 104 comprises common channel signalling interface and IP signaling interface.
Wherein, with reference to figure 5, equipment 1 also comprises: public administration unit 105, couple with signaling retransmission unit 101 and priority adjustment unit 102, and be used to dispose the priority attribute of specifying this signaling link; Common interface 106 couples with public administration unit 105, is used for receiving or sending control, configuration information.
According to the equipment of a kind of processing signaling link switchover in signaling network provided by the invention, this equipment can be by the priority attribute of public administration unit configure signaling link.Signaling retransmission unit in the described equipment no longer goes transmitting signaling message according to the active information of ASP side, but according to the priority attribute transmitting signaling message of signaling link, has only the highest signaling link of priority just to be used for transmitting signaling message.Abandon signaling link when needs from one group and switch to another group during available signaling link, the priority of the signaling link abandoned is reduced, increase the priority of described available signaling link, the available signaling link transmitting signaling message that priority is the highest like this, and can be not again to abandoning signaling link transmitting signaling message, thereby reach the purpose of automatic switchover.
Be a preferred embodiment of the present invention below.
With reference to figure 6, illustrate the illustration that the present invention uses.SGW 1 couples two kinds of different systems between circuit-switched network and IP packet network.The signaling of transmission all is the NO.7 signaling among SSP in the circuit-switched network (ServiceSwitching Point, Service Switching Point) 24 and the SCP (Service Control Point, service control point) 25, couples with SG1 by common channel signalling interface 1041; The signaling of transmitting among MGC34 in the IP packet switching network and the MGC35 is the SIGTRAN signaling, couples by IP signaling interface and SG1.The effect of SG1 is that the NO.7 signaling in the Circuit Switching Network is converted to the SIGTRAN signaling, so that telecommunication service seamless interconnecting in two kinds of heterogeneous networks.
SG1 is embedded in the MG, belongs to MGC34 and MGC35, before starting SG1, can be configured it by public administration unit 105, comprise configuration SIGTRAN signaling link priority attribute, and dispose one group of SIGTRAN signaling link and belong to MGC34 that another group belongs to MGC35.
When MGC34 breaks down, but MGC35 is still available, and MG is by H.248 protocol registration is to MGC35, and SG1 processing signaling link switchover at this moment comprises:
In step 701, the signaling link situations are surveyed in unit, link detection unit 103, when detecting MGC34 when unavailable, just enter step 702.
In step 702, link detection unit 101 judges whether to possess switching condition, if possess, then enters step 703, otherwise, forward step 701 to; Illustrate that to MGC35 MGC35 is available signalling point, satisfies switching condition by protocol registration H.248 when detecting the unavailable and MG of MGC34.
In step 703, priority adjustment unit 102 reduces the priority that belongs to the SIGTRAN signaling link of MGC34 according to result of detection, is increased to the priority that belongs to the SIGTRAN signaling link of MGC35 the highest.
In step 704, after the signaling retransmission unit is handled according to priority adjustment unit 102 the priority attribute of SIGTRAN signaling link, transmitting signaling message.Comprise stopping to the low MGC34 transmitting signaling message of priority, to priority the highest belong to MGC35 transmitting signaling message.
According to the present invention compared with prior art, signaling retransmission unit in the technical scheme of a kind of processing signaling link switchover in signaling network provided by the invention no longer goes transmitting signaling message according to the active information of ASP side, but, have only the highest signaling link of priority just to be used for transmitting signaling message according to the priority attribute transmitting signaling message of signaling link.Abandon signaling link when needs from one group and switch to another group during available signaling link, the priority of the signaling link abandoned is reduced, increase the priority of described available signaling link, the available signaling link transmitting signaling message that priority is the highest like this, and can be not again to abandoning signaling link transmitting signaling message, thereby reach the purpose of automatic switchover.
Above disclosed only is the preferred embodiments of the present invention, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of being done according to the present patent application claim still belongs to the scope that the present invention is contained.
Claims (15)
1, a kind of method of processing signaling link switchover in signaling network is characterized in that, comprises step:
(a) survey signaling link and whether possess switching condition;
(b) adjust the priority of signaling link according to result of detection;
(c) according to adjusting hand off signaling link as a result.
2, in accordance with the method for claim 1, it is characterized in that, adjust signaling link priority in the described step (b) and comprise that the priority with former signaling link reduces, and increases the priority of new link connection.
3, in accordance with the method for claim 1, it is characterized in that the hand off signaling link comprises and stopping to the low signaling link transmitting signaling message of priority in the described step (c), only to the highest signaling link transmitting signaling message of priority.
4, in accordance with the method for claim 1, it is characterized in that the switching condition in the described step (a) comprises signaling link failure, but have a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.
5, according to optional described method in the claim 1 to 4, it is characterized in that the preceding priority that also comprises the described signaling link of initial configuration of step (a).
6, in accordance with the method for claim 5, it is characterized in that described signaling link is that signaling is transmitted the SIGTRAN signaling link.
7, a kind of equipment of processing signaling link switchover in signaling network, described equipment comprises:
Signaling interface is connected with at least one signaling link, is used for receiving or sending signaling message;
The signaling retransmission unit couples with signaling interface, is used for transmitting signaling message;
It is characterized in that described equipment also comprises:
The link detection unit couples with the signaling retransmission unit, is used to survey signaling link and whether possesses switching condition;
The priority adjustment unit couples with link detection unit and signaling retransmission unit, is used to adjust signaling link priority;
Then described signaling retransmission unit also is used for according to the adjusted hand off signaling as a result of described priority adjustment unit link.
According to the described equipment of claim 7, it is characterized in that 8, described priority adjustment unit is adjusted signaling link priority and comprised that the priority with former signaling link reduces, and increases the priority of new link connection.
9, according to the described equipment of claim 7, it is characterized in that, described signaling retransmission unit also is used for according to the adjusted hand off signaling as a result of described priority adjustment unit link, comprise stopping, only to the highest signaling link transmitting signaling message of priority to the low signaling link transmitting signaling message of priority.
According to the described equipment of claim 7, it is characterized in that 10, the switching condition that described link detection unit is surveyed comprises signaling link failure, but has a signaling link to use at least in addition; Or destination signaling point breaks down, but has a signalling point to use at least in addition.
11, according to optional described equipment in the claim 7 to 10, it is characterized in that described signaling link is supported priority, and can specify the priority attribute of this signaling link by configuration.
According to the described equipment of claim 11, it is characterized in that 12, described equipment also comprises:
The public administration unit couples with signaling retransmission unit and priority adjustment unit, is used to dispose the priority attribute of specifying this signaling link;
Common interface couples with the public administration unit, is used for receiving or sending control, configuration information.
According to the described equipment of claim 11, it is characterized in that 13, described signaling link can be that signaling is transmitted the SIGTRAN signaling link.
According to claim 7 or 13 described equipment, it is characterized in that 14, described signaling retransmission unit also is used for the SIGTRAN signaling that will be converted to based on Circuit-switched common channel signalling based on the IP packet switching.
According to the described equipment of claim 14, it is characterized in that 15, described signaling interface comprises common channel signalling interface and IP signaling interface.
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| CNB2006100351925A CN100484110C (en) | 2006-04-25 | 2006-04-25 | Method and apparatus for switching signaling link |
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Non-Patent Citations (2)
| Title |
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| 浅谈SDH网络的保护倒换. 钱秀琴.电信技术，第2003年卷第09期. 2003 |
| 浅谈SDH网络的保护倒换. 钱秀琴.电信技术，第2003年卷第09期. 2003 * |
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