CN1536819A - Method for implementing dual home in next network - Google Patents
Method for implementing dual home in next network Download PDFInfo
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- CN1536819A CN1536819A CNA031098592A CN03109859A CN1536819A CN 1536819 A CN1536819 A CN 1536819A CN A031098592 A CNA031098592 A CN A031098592A CN 03109859 A CN03109859 A CN 03109859A CN 1536819 A CN1536819 A CN 1536819A
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Abstract
The invention discloses a method for realizing double-ascription in the next generation network. The method includes following steps: a) sets the two soft exchanges which manage network device with different range as the double-ascription in the next generation network, the relative data of all the access device charged by the two soft exchanges are set in the double-ascription soft exchanges at the same time, and creates the master-slave relation between the double-ascription soft exchanges and all the access device; b) in the process of network running, judges that if the two soft exchanges need to be switched, if need, then the soft exchange which is running normally currently turns over all the access devices in managing range of the double-ascription soft exchanges, otherwise, returns to step b. By using the invention, it can realize double-ascription, at the same time; it upgrades the calamity emergency processing ability.
Description
Technical field
The present invention relates to the administrative skill of next generation network (NGN), be meant dual-homed implementation method in a kind of NGN network especially.
Background technology
Along with the user is more and more higher to the requirement of network security reliability and network throughput, operator must just introduce enough capacity and various diversity means in network when planned network at the beginning, so that provide sufficiently high service ability to the user, reduce the influence that fault causes as far as possible, improve priority restores ability, dual access capability and multiple routing ability of network or the like, with normally providing of guaranteeing to serve, make the user very high satisfaction be arranged to the service that is provided.But then,, not only can cause the increase of networking cost and maintenance management cost if adopt the mode of active and standby usefulness for core control or treatment facility, even also can be owing to caused the bigger wasting of resources with equipment idle.
Therefore, under the taking all factors into consideration of several respects factors such as device integration, cost, disaster tolerance ability and internet security, introduced dual-homed notion, its role is to prevent network large tracts of land paralysis machine or in the mechanism that communication occurs promptly to provide when the burst fire-disaster accident takes place, the rapid recovery capability of devices communicating when being provided at extreme abnormal conditions and taking place.Such as: include the Restoration Mechanism of emergency communication, 80%～90% communication recovery ability can be provided.Described here is dual-homed, actually be meant a kind of special terminal connection method, make each need switching control center to provide the terminal of service to link to each other with two switching control centers simultaneously, be that same terminal belongs to two switching control centers, one is main, one is can provide service by in affiliated two switching control centers any one from, this terminal, and dual-homed processing disaster tolerance ability that provides and dual-homed networking and realization have great relation.
Dual-homed notion originates from Optical synchronization digital series (SDH) technology, once used in public switch telephone network (PSTN) field, owing on consensus standard, do not support dual-homed realization, therefore, dual-homed in PSTN is to solve by the redundance unit network's mode, and specific practice is: in each grade tandem exchange of PSTN, utilize redundance unit to arrange a plurality of office directions, realize dual-homedly on office direction, when there was disaster tolerance in one of them office point, other office direction can be selected by system.
NGN is an emerging communication network, and its network construction characteristic is: structure, control and the transfer of data with layering is separated, can provides value-added service, the Internet protocol (IP) of portion's operation within it.And, increased support in the consensus standard of NGN to dual-homed function.But, dual-homed use in the NGN field does not at present also have ripe solution, if directly the PSTN scheme is introduced, because the dual-homed scheme among the PSTN is based on equipment redundancy thought, and the Trunk Media Gateway among the NGN separates with soft switch, has following shortcoming if plan a plurality of tandem exchanges:
1) under jumbo situation, the TMG and the soft switch of a plurality of redundancies are set, can cause bigger device resource waste, and the emphasis network cost.
2) realize when having only a soft switch to break down, can causing dual-homed among the NGN this soft switch subordinate's normal TMG to use, thereby can't give full play to the advantage of NGN with the dual-homed scheme under the PSTN.
Summary of the invention
In view of this, main purpose of the present invention is the implementation method that provides dual-homed among a kind of NGN, make NGN realize dual-homed in, improve the disaster tolerance emergency capability of system.
For achieving the above object, technical scheme of the present invention is achieved in that
Dual-homed implementation method in a kind of next generation network, this method may further comprise the steps:
A., the soft switch that two management different range network access equipments are set in next generation network is dual-homed soft switch, the related data of all access devices in two soft switch range of managements is arranged in this dual-homed soft switch simultaneously, and sets up principal and subordinate's attaching relation between this dual-homed soft switch and all access devices;
B. in network operation process, whether two soft switch of real-time judge need to switch, and if desired, then take over all access devices in the dual-homed soft switch range of management by the normal soft switch of current operation, otherwise, return step b.
Step b is described to be judged as real-time detection and whether to receive two webmaster orders that soft switch is switched of indication, if receive, then two soft switch need be switched; Otherwise two soft switch do not need to switch, and continue to detect.
The data backup passage of backup the other side data is set between described two soft switch.
The heartbeat line that detects the other side's current state is set between described two soft switch, then step b is described is judged as by the real-time current state that detects two soft switch of heartbeat line, whether judgement side's soft switch in the predefined time receives the heartbeat signal of the opposing party's soft switch, if receive, then two soft switch do not need to switch, and continue to detect; Otherwise, judge again whether the signaling transmission passage between the opposing party's soft switch and its subordinate's access device interrupts, if transmitting passage, signaling do not interrupt, then do not need to switch soft switch, continue detection; Interrupt if signaling transmits passage, then soft switch need be switched.
So, when detecting soft switch and need switch, step b further comprises: all access devices of the source soft switch subordinate that switch are initiated heavily registration to the purpose soft switch that will switch to; Described purpose soft switch simultaneously changes the state of self into acceptance, and accepts the heavily registration of described all access devices of source soft switch subordinate.
This method further comprises: the switching mode that each soft switch is set is steady job mode or automatic working method.Then this method further comprises: detect need between two soft switch to switch after, judge that the switching mode of soft switch is fixed form or automated manner, if fixed form is not then switched; If automated manner then carries out the switching of soft switch.
The switching mode that each access device is set is steady job mode or automatic working method.Then this method further comprises: after detecting current access device and its main ownership soft switch communication disruption, judge that the switching mode of access device is fixed form or automated manner, if fixed form does not then deal with; If automated manner is then initiated the heavily registration to another soft switch.
Access device is after heavily registering, and this method further comprises: directly remove self current all-calls, and discharge whole resources.Perhaps, in the predefined time, keep earlier all TDM and connect, whether issue according to the soft switch of current ownership then and take message and determine whether to remove that TDM connects and corresponding calling.If preestablishing the message that takies of not receiving in the time that current ownership soft switch issues, then after overtime, access device is removed self current all-calls, and discharges whole resources.
This method further comprises: after the soft switch recovery of breaking down, switching soft switch preceding serves as that main whole switching the back by this recovery soft switch of access device that belongs to soft switch manages with this recovery soft switch.
This method further comprises: with switching equipment that two soft switch connect in the communication route of corresponding different soft switch is set respectively.
This method further comprises: the network management center in the network is linked to each other with two soft switch simultaneously, and network management center issues the identical configuration order that contains different parameters to two soft switch respectively.
Dual-homed implementation method among the NGN provided by the present invention has following advantage and characteristics:
1) the present invention is provided with two soft switch in NGN, the subordinate's that draws oneself up respectively when normal gateway device, but when fault, manage and control all gateways by a soft switch; Simultaneously, the lower floor of soft switch insert and the upper strata control appliance in the corresponding dual-homed data of configuration, being supported in two switchings between the Softswitch, thus dual-homed realization among the assurance NGN.
2) because the present invention has only soft switch to be provided with two in NGN, other access and control appliance all are by communicating by letter between configuration data and physical connection support and two soft switch, switching and coordination, therefore, under the situation that does not increase networking cost and networking complexity substantially, realized dual-homed among the NGN.
3) because the present invention has realized dual-homed among the NGN, so, not only can improve the system disaster tolerance emergency capability among the NGN, can also give full play to the network advantage of NGN.
4) dual-homed implementation provided by the present invention simple, flexibly, be easy to realize.
Description of drawings
Fig. 1 is the composition structural representation of double attaching system among the present invention;
Fig. 2 is for realizing the networking plan schematic diagram of data sync among the present invention;
Fig. 3 implements illustration for the networking of NGN among the present invention;
Fig. 4 is for realizing the heartbeat figure of state-detection among the present invention;
Fig. 5 realizes an embodiment networking plan schematic diagram of interoffice intercommunication for the present invention;
Fig. 6 realizes another embodiment networking plan schematic diagram of interoffice intercommunication for the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Because NGN supports dual-homed realization, the present invention realizes that dual-homed core concept is: at first, the soft switch that two management zoness of different are set in NGN is dual-homed soft switch, and the related data of all access devices in two soft switch range of managements all is set in these two soft switch, with two soft switch in season respectively with two soft switch range of managements in all access devices of lower floor set up the annexation of principal and subordinate's ownership.Because two soft switch range of management differences, so for each access device, the soft switch under it is current is the soft switch of main ownership, another soft switch is from the ownership soft switch.Then, normally move at network, in the communication process, detect the current state of two soft switch in real time, need to judge whether to switch, if desired, then finish soft switch, promptly manage all access devices by a soft switch that is in normal condition; If do not need, then continue current normal running, and continue to detect the state of two soft switch.
Fig. 1 is the composition structural representation of double attaching system among the present invention, referring to shown in Figure 1, two soft switch SS1, SS2 are set in dual-homed NGN system, similar entity and the function unanimity that provides are provided in these two soft switch, otherwise, will be inconsistent and do not support dual-homed function, each soft switch to cover and control certain zone respectively owing to function, as: metropolitan area 1 and metropolitan area 2, the scope non-overlapping copies that metropolitan area 1 and metropolitan area 2 cover.At this moment, SS1 is the main ownership soft switch of metropolitan area 1, for metropolitan area 2 from the ownership soft switch; Equally, SS2 is the main ownership soft switch of metropolitan area 2, for metropolitan area 1 from the ownership soft switch.Between two soft switch, have the inclination wire jumper (Heartbeat), carry out the maintenance and the negotiation of state by the heartbeat line; Also has the data backup passage between two soft switch, to realize the non real-time automatic data backup or to come Backup Data by maintenance command.These two soft switch link to each other with the network management center on soft switch upper strata simultaneously, receive the independent instruction of network management center respectively, and the state and the working condition of soft switch detected and controlled in network management center in real time.
Each access device in soft switch lower floor as the Tandem Gateway among Fig. 1 (TG), IAD (AG), integrated/Integrated Access Device etc., all is respectively arranged with relatively independent control access signaling transmission passage and links to each other with two soft switch.The passage that the control access signaling transmits during for operate as normal as: the solid line between metropolitan area 1 and metropolitan area 2 and SS1, the SS2, dotted line are the current soft switch alternate channel that the control access signaling transmits when maybe needing to switch that breaks down.In other words be exactly, for each access device, all link to each other simultaneously with two soft switch, respectively as the main ownership soft switch of oneself with from the ownership soft switch, promptly at dual-homed soft switch and access device, must there be two kinds of incidence relations: main ownership or from ownership, and irrelevant with concrete physical location.Be specially the soft switch of main ownership still from the ownership soft switch, can when initial start, the mode by competition determine, such as: by heartbeat line competition principal and subordinate ownership, or by the third party, as network management center arbitration principal and subordinate ownership, also can be described as through third party's heartbeat of transferring and determine that the principal and subordinate belongs to.
In order to guarantee that the principal and subordinate belongs to data synchronization in the soft switch, not only belong to the unanimity of keeping data between the soft switch by the data backup passage the principal and subordinate, and when configuration data being set by network management center, as shown in Figure 2, network management center can be issued to the principal and subordinate synchronously with same configuration order and belong to soft switch, and just the principal and subordinate belongs to the parameter difference of soft switch.After the principal and subordinate belongs to soft switch and receives orders, independently generate and set the configuration data of self.
Fig. 3 is based on the networking diagram in the practical application of Fig. 1 thought, and have two soft switch in the network system of Fig. 3: soft switch 1 and soft switch 2, these two soft switch form dual-homed general layout.Under normal condition, each soft switch all draw oneself up AG, TG, Universal Media Gateway of metropolitan area etc., but when one of them soft switch produces fault or user and needs, another soft switch will be taken over AG, TG that this fault soft switch controls, UMG etc.Two soft switch can be positioned at different geographic areas physically, and in Beijing, another soft switch is in Shanghai such as: soft switch, so that the long-distance disaster ability of big capacity office to be provided.Each access device all has relatively independent control access signaling transmission passage to link respectively in two soft switch, and all dispose the data that are connected communication with two soft switch on each access device, in the system each inserts entity, own main ownership soft switch all arranged and from belonging to soft switch as AG, TG, UMG.Each equipment in the system can be linked in the unified Upper NM Station, as network management center, is managed by unified network management center.Among Fig. 3, the heavy line between soft switch 1 and the soft switch 2 is the heartbeat line, and fine line is a Bearer Channel, chain-dotted line be and network management center between transmission channel, thick dashed line is the signalling path of soft switch 1, fine dotted line is the signalling path of soft switch 2.
In networking, above-mentioned network configuration is presented as independently two offices, is not simple active and standby with relation between these two soft switch, but mutual-aid relation.Only therein under the situation of an inefficacy, another just bears the business of two offices simultaneously, at this moment, for inserting entity, be a kind of lead the ownership soft switch with from belonging to the conversion between the soft switch.From this networking mode as can be seen, under this dual-homed configuration, when natural calamity takes place, cause a soft switch to withdraw from service, then the media gateway that the soft switch of the service of withdrawing from is controlled is taken in another soft switch meeting, to guarantee professional not interrupting.
In course of normal operation, detect the current state that the principal and subordinate belongs to soft switch in real time, judge whether to carry out the principal and subordinate and belong to switching between the soft switch.Here, the subject of implementation of described soft switch state-detection is from ownership soft switch and medium access device, and detection mode is to belong to heartbeat line between the soft switch by the principal and subordinate, and the signaling between soft switch and the access device transmits passage.For the detection of implementing from the ownership soft switch, specifically be like this: if a side does not receive the opposing party's heartbeat signal at the appointed time, think that then another soft switch breaks down, so change the state of self into " acceptance ", expression can be accepted the heavily registration of access devices such as IAD, TG under the opposing party's soft switch control and AG.Whether overtime herein, proprietary protocol is generally adopted in the communication between the heartbeat line, and the value of fixed time can be pre-configured, and indication is set simultaneously when sends the heartbeat transmission timer of heartbeat signal and indication and receive heartbeat signal heartbeat timeout timer.
Give an example, referring to shown in Figure 4, SS1 uses the heartbeat line to communicate by letter with SS2, and after system start-up, SS1 starts the heartbeat transmission timer, and duration is set to 60S.Behind this timer expiry, SS1 sends heartbeat signal to SS2, starts the heartbeat timeout timer simultaneously, and duration need be less than the heartbeat transmission timer, such as: duration is set to 30S; If when receiving the heartbeat message of SS2 or heartbeat response message, then stop the heartbeat timeout timer of SS1; If do not receive any message of SS2 at the appointed time, then refresh the heartbeat timeout timer of SS1, reclocking behind heartbeat timer expiry five times, is then thought the SS2 machine of delaying.In like manner, the way of SS2 and design and SS1 are identical.
For the detection between medium access device and soft switch, specifically: access device is by monitoring (Audit) or the execution of other message and the state that soft switch is determined in response of Media Gateway Control Protocol/H248 agreement, the state of real-time tracking soft switch such as AG, TG, UMG, when its master's ownership soft switch generation disaster tolerance, the changed course state is that normal soft switch is heavily registered immediately.
For soft switch and access device, all provide fixing and automatic two kinds of working methods as TG, AG, UMG etc., wherein, fixedly be meant by artificial and give soft switch and access device transmitting order to lower levels by the webmaster maintenance centre, initiatively require to switch principal and subordinate's ownership; Automatically be meant then that system detects automatically, when detecting system disaster tolerance, carry out the principal and subordinate automatically by system and belong to switching, do not need manual command, but need provide the warning information of switching in network management center.The difference of this dual mode is: under fixed form, even system detects fault, also can not carry out the principal and subordinate and belong to switching, remove unartificial transmitting order to lower levels; Under automated manner, not only system is detecting under the fault, carries out the principal and subordinate automatically and belongs to switching, even as long as receiving the switching command that issues from network management center when not having fault to occur also can switch, general automated manner is a system default acquiescence mode.
Be noted that: when access device is set to fixed form, allow the webmaster access device that gives an order, directly do switching as AG/TG/UMG, and accept the webmaster switching that soft switch initiates that gives an order, just system does not switch after detecting automatically and being out of order.Such as: AG/TG/UMG is set to fixed form, and when between AG/TG/UMG and the soft switch during link down, AG/TG/UMG can not switch to another soft switch; If AG/TG/UMG is set to automated manner, between AG/TG/UMG and the soft switch during link down, AG/TG/UMG just can initiate register requirement to another soft switch, can or can not accept to register the state that will see this soft switch this moment as for another soft switch.Table one be depicted as above-mentioned two kinds of working methods the scope of application, switch relevant informations such as condition.
| Working form | Applicable object | Switch condition | Default mode whether |
| Fixing | The soft switch access device | The webmaster order | Not |
| Automatically | The soft switch access device | 1, webmaster order 2, the system failure | Be |
Table one
From above-described two kinds of working methods as can be seen, switch that the condition of principal and subordinate ownership is actual two kinds: manual command and detection failure.Wherein, detection failure is for detecting heartbeat interruption and access device, or heartbeat interruption and perception soft switch fault.As long as two kinds of conditions have one to satisfy, and the permission of the working method of Set For Current, just can switch.After switching, access device can heavily be registered in the ownership soft switch after switching, if succeed in registration, thinks that then the soft switch of current use is the soft switch of main ownership.
The principal and subordinate belongs to switching between the soft switch, from initiating object, is divided into two kinds:
1) handoff procedure of main ownership soft switch initiation has only the order of switching that issues by network management center to realize there is not automated procedure.If corresponding access device all is set to fixed form, then corresponding access device is not accepted to be initiated to switch by soft switch.If corresponding access device is set to automated manner, when then belonging to soft switch initiation switching by webmaster command request master, main ownership soft switch notice is accepted corresponding access device to the heavily registration of initiating from the ownership soft switch from the ownership soft switch, corresponding access device is received after the instruction of main ownership soft switch initiation switching, is initiated self at once to the heavily registration from the ownership soft switch.
The switching that the soft switch of main ownership is initiated applies to the great upgrading of soft switch, resettlement etc. usually and has under the situation that the soft switch of the property expected paralyses fully, and can more former master be switched back in all communications belong to soft switch after main home device is recovered.The webmaster instruction of handoff procedure is initiated in the soft switch of master's ownership, may be to initiate to each access device of registering unification according to the situation of soft switch configuration, and also may be that initiate on individual instructions one rule ground.
2) handoff procedure of being initiated by access device according to the set working method of access device, is divided into again: full switching mode and part switching mode.
Wherein, full switching mode is meant access device, is set to automated manner as TG/AG/UMG, when TG/AG/UMG detects when interrupting with being connected of current main ownership soft switch, then is initiated to from the heavy registration process of ownership soft switch.Simultaneously, whether interrupt judging the main ownership soft switch machine of whether delaying from the ownership soft switch according to heartbeat, thereby whether decision accepts the registration of former main ownership soft switch subordinate access device,, then receive registration such as: the main ownership soft switch machine of having delayed; The machine if the soft switch of main ownership is not delayed then information errors may occur, does not accept the registration of access device under the soft switch of main ownership in this case from the ownership soft switch.This mode mainly applies to Softswitch and all paralyses, and paralysed machine or the fault that artificially can't predict.
The part switching mode is meant access device, is set to fixed form as TG/AG/UMG, in such cases, and can be by webmaster commands for controlling access device to registration, if accept the registration of access device, then handover success from belonging to soft switch from the ownership soft switch.Otherwise handoff failure.Here accept registration and be meant that satisfying two kinds allows a kind of of the condition of switching to get final product.This mode is mainly used in order to alleviate impacting from the bursts of traffic of ownership soft switch, step by step with access device, switches to from the ownership soft switch as AG or TG or UMG.
Equally, under the switching mode of being initiated by access device, after the soft switch of breaking down recovers, can pass through configuration order, will serve as the access device of main ownership soft switch with this recovery soft switch originally, all switches back by this recovery soft switch to manage.
The prerequisite that above handoff procedure is realized is: support is set to the performance data of heavily registering from the ownership soft switch in access device, that is to say, support is set in access device in advance belongs to the configuration data that soft switch is communicated by letter by H.248/MGCP waiting agreement and principal and subordinate, so, access device just can be after satisfying corresponding trigger condition, to initiating heavily registration from the ownership soft switch.
In the process of realize switching, in order to guarantee to call out and the seamlessly transitting of link circuit resource, to carry out smoothing processing to the all-calls in the access device, this smoothing processing comprises following dual mode:
First kind of mode, access device is removed this access device from one's body all-calls after heavy registration, discharge whole resources;
After the second way, access device switched in the new soft switch, all Time Division Multiplexing connected and all keeps, and was all TDM circuit resource settings and starts a timer T1; If in the T1 timer, current ownership soft switch has issued the message that takies this circuit, then access device is removed original connection, return successively and take failure, service disconnection (OUT OF SERVICE) and professional in use (INSERVICE) three message, this TDM circuit that resets after these three message is received in soft switch, thereby with call tear down, and and the opposite end circuit state be consistent; If in the T1 timer, current ownership soft switch does not issue the message that takies this circuit, then access device can be behind the T1 timer expiry, with current all remaining original connection complete removals, and the TDM circuit for every current dismounting reports OUTOF SERVICE and IN SERVICE message successively, the corresponding TDM circuit that resets after these two message is received in soft switch, dismantling call, and and opposite end office's circuit state be consistent.If in the T1 timer, do not receive any message that takies that current ownership soft switch issues, then behind the T1 timer expiry, remove the all-calls of self by access device, and discharge whole resources.
Above-mentioned dual mode can be provided with for the user by switch and select.In the second way, for the resource of ATM/IP carrying, the access device setting also starts a timer T1, and in T1, the message that issues from current ownership soft switch is directly returned failure and got final product; After T1 is overtime, directly discharge by user's plane signaling for the calling that does not have to discharge.
In actual applications,, in opposite end office, also to dispose the data of corresponding dual-homed soft switch resource for finishing the intercommunication of opposite end office and dual-homed soft switch, such as: dispose respectively that first, second sub-route is corresponding respectively to belong to the interoffice intercommunication of soft switch with the principal and subordinate.
To belong to the soft switch intercommunication be example with having principal and subordinate in the dual-homed exchange network with certain FXO, as shown in Figure 5, SS1 and SS2 are that the principal and subordinate in the dual-homed switching network belongs to exchange, SS0 is the exchange outside the dual-homed switching network, SS1 and SS2 link to each other with AG2 with access device AG1 respectively simultaneously, that is: SS1 be AG1 the soft switch of main ownership, AG2 from belonging to soft switch; SS2 be AG2 the soft switch of main ownership, AG1 from the ownership soft switch.
In SS0, dispose two routes respectively through SS1 or SS2 arrival AG1 or AG2, just as shown in FIG., link 501 arrives the second sub-route of AG1 for the first sub-route of SS0 through main ownership soft switch SS1 arrival AG1, link 502 through the ownership soft switch SS2 that associates for SS0; Link 503 arrives the second sub-route of AG2 for the first sub-route of SS0 through main ownership soft switch SS2 arrival AG2, link 504 through the ownership soft switch SS1 that associates for SS0.
When SS1 breaks down and can't communicate by letter with SS0, and during the user under the SS0 calling AG1, such as: when user C passes through SS0 calling party A, user A belongs to AG1, and then belong to SS1, SS0 routing by the time find that the first sub-route of SS1 correspondence is unavailable, then further select the second sub-route of SS2 correspondence, finish calling with AG1 by SS2.
Is example by signaling network management (SG) with the PSTN intercommunication to have dual-homed network, and as shown in Figure 6, SS1 and SS2 are that the principal and subordinate in the dual-homed switching network belongs to exchange, SS1 and SS2 difference corresponding different signalling point DSP1, DSP2.In PSTN exchange, to two routes that arrive AG1 from switch (Switch) be set respectively at SS1 and SS2, that is: through the first sub-route of DSP1 and the second sub-route of process DSP2, solid line among the figure between PSTN exchange and the SG is the first sub-route, and dotted line is the second sub-route.
When SS1 was unavailable, SG can notify the Switch among the PSTN; If the calling to AG1 is arranged this moment, such as: user A calling party B, so, in the trunk line selection process, Switch among the PSTN finds that the resource of the first sub-route is unavailable, then can select the second sub-route automatically, be accomplished to the calling of AG1, and then realize the calling between user A and the user B by SS2.
In the concrete application process of network, also relate to call charging, at this moment, the principal and subordinate belongs to soft switch and is connected to the charging center separately.When access device be switched to from the ownership soft switch after, the ticket of generation can be sent to the charging center equally.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (16)
1, dual-homed implementation method in a kind of next generation network (NGN) is characterized in that this method may further comprise the steps:
A., the soft switch that two management different range network access equipments are set in next generation network is dual-homed soft switch, the related data of all access devices in two soft switch range of managements is arranged in this dual-homed soft switch simultaneously, and sets up principal and subordinate's attaching relation between this dual-homed soft switch and all access devices;
B. in network operation process, whether two soft switch of real-time judge need to switch, and if desired, then take over all access devices in the dual-homed soft switch range of management by the normal soft switch of current operation, otherwise, return step b.
2, method according to claim 1 is characterized in that: the heartbeat line that detects the other side's current state is set between described two soft switch.
3, method according to claim 1 is characterized in that: the data backup passage that backup the other side data are set between described two soft switch.
4, method according to claim 1 is characterized in that: step b is described to be judged as real-time detection and whether to receive two webmaster orders that soft switch is switched of indication, if receive, then two soft switch need be switched; Otherwise two soft switch do not need to switch, and continue to detect.
5, method according to claim 2, it is characterized in that: the described current state that detects two soft switch by the heartbeat line in real time that is judged as of step b, whether judgement side's soft switch in the predefined time receives the heartbeat signal of the opposing party's soft switch, if receive, then two soft switch do not need to switch, and continue to detect; Otherwise, judge again whether the signaling transmission passage between the opposing party's soft switch and its subordinate's access device interrupts, if transmitting passage, signaling do not interrupt, then do not need to switch soft switch, continue detection; Interrupt if signaling transmits passage, then soft switch need be switched.
6, according to claim 4 or 5 described methods, it is characterized in that: when detecting soft switch and need switch, step b further comprises: all access devices of the source soft switch subordinate that switch are initiated heavily registration to the purpose soft switch that will switch to; Described purpose soft switch simultaneously changes the state of self into acceptance, and accepts the heavily registration of described all access devices of source soft switch subordinate.
7, method according to claim 1 is characterized in that this method further comprises: the switching mode that each soft switch is set is steady job mode or automatic working method.
8, method according to claim 7 is characterized in that this method further comprises: determine need between two soft switch to switch after, judge that the switching mode of soft switch is fixed form or automated manner, if fixed form is not then switched; If automated manner then carries out the switching of soft switch.
9, method according to claim 1 is characterized in that this method further comprises: the switching mode that each access device is set is steady job mode or automatic working method.
10, method according to claim 9, it is characterized in that this method further comprises: after determining current access device and its main ownership soft switch communication disruption, the switching mode of judging access device is fixed form or automated manner, if fixed form does not then deal with; If automated manner is then initiated the heavily registration to another soft switch.
11, according to claim 6 or 10 described methods, it is characterized in that this method further comprises: access device is removed self current all-calls, and is discharged whole resources after heavily registering.
12, according to claim 6 or 10 described methods, it is characterized in that this method further comprises: after access device is heavily registered, in the predefined time, keep earlier all Time Division Multiplexing and connect, whether issue according to the soft switch of current ownership then and take message and determine whether to remove that TDM connects and corresponding calling.
13, method according to claim 12, it is characterized in that this method further comprises: preestablishing the message that takies of not receiving in the time that current ownership soft switch issues, then after overtime, access device is removed self current all-calls, and discharges whole resources.
14, method according to claim 1, it is characterized in that this method further comprises: after the soft switch recovery of breaking down, switching soft switch preceding serves as that main whole switching the back by this recovery soft switch of access device that belongs to soft switch manages with this recovery soft switch.
15, method according to claim 1 is characterized in that this method further comprises: with switching equipment that two soft switch connect in the communication route of corresponding different soft switch is set respectively.
16, method according to claim 1 is characterized in that this method further comprises: the network management center in the network is linked to each other with two soft switch simultaneously, and network management center issues the identical configuration order that contains different parameters to two soft switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109859 CN1536819B (en) | 2003-04-11 | 2003-04-11 | Method for implementing dual location in next network |
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