CN101442667B - Interworking system for operation class video monitoring system - Google Patents
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Abstract
The invention discloses a carrier-class network video monitoring system and a carrier-class network video monitoring method. The system comprises a plurality of domains, wherein each domain comprises a peripheral unit (PU), a client unit (CU) and a central service platform, and the peripheral unit (PU), the client unit (CU) and the central service platform have access to an IP bearer network respectively. The method is characterized in that the domains are interconnected through the IP bearer network to realize the intercommunication of two layers, namely signaling and media; and the domains adopt a flat networking mode to be interconnected.
Description
Technical field
The present invention relates generally to video monitoring system, and relate in particular to a kind of interoperability methods for networked video moniotring and controlling system in operation level.
Background technology
At present, many IT Enterprises progressively enter the security protection service field, and have therefore improved the scientific and technological level of security protection service field.Along with the progress of technology, the significant progress that the safety monitoring technology also obtains.Up to now, be used for the safety monitoring service Video Supervision Technique development experience simulation epoch, digital Age, long-range epoch.
Now, network is day by day universal, and the digitlization process of Video Supervision Technique also begun and obtained certain development, and therefore, many people begin to consider the two is combined, so that the service that more has advantage to be provided.For example, China Telecom has released networked video moniotring and controlling system in operation level.
The video monitoring system of prior art as shown in Figure 1.Fig. 1 shows the video monitoring system of individual domain, and this system comprises such as lower unit:
-front end unit (PU) is used for realization to the functions such as collection, buffer memory, coding, storage and transmission of audio/video information, warning information etc., and can come the control command of automatic network.Front end unit (PU) comprises following equipment without limitation: video camera, The Cloud Terrace, video server, warning input-output equipment etc.
-client unit (CU) is used to the client to present the service that system provides, and for example, can be used for browsing and controlling the system of far-end video.Client unit can display of video content and audio plays content, for example, can be used for decoding, play and control real-time or historical audio frequency and/or video content.Client unit can also realize management function, and for example, it can be used for realize user management, service fulfillment and chain of command, realization system maintenance, realize receiving a crime report and the function such as video wall.
-center service platform, at the networked video moniotring and controlling system in operation level of prior art, center service platform turns Dispatching Unit (VTDU) by center management server (CMS), authentication/authentication/charging (AAA) server, video and network video recording unit (NRU) forms.
Wherein, center management server is the core cell of center service platform, can realize to front end unit and client unit access, signaling forward process and to management of system and information thereof etc.
Video turns Dispatching Unit can realize audio frequency and video request, reception, forwarding, distribution.Wherein, can dispose described video by multi-stage cascade or distributed mode and turn Dispatching Unit.
Network video recording unit can be realized video storage, retrieval and support video playback.Can dispose described network video recording unit by distributed mode.
The defective of described prior art is, this video monitoring system is the video monitoring system of individual domain, do not realize between each territory interconnecting.Therefore, each service platform can not be realized the cross-platform scheduling of video resource just as information island one by one.For transprovincially, the user that strides districts and cities uses, this system is extremely inconvenience.
Be to be on July 12nd, 2006, application people to disclose a kind of network video monitor and control system in for Shanghai Telecommunications Technological Research Institute, the Chinese patent invention ZL 200410016852.6 (documents 1) of denomination of invention for " network video monitor and control system " March 10, Granted publication day in 2004 in the applying date, this patent all is incorporated herein by reference at this.In documents 1 disclosed network video monitor and control system, by the IP bearer network center service platform, front terminal system and client unit subsystem are linked to each other.
In the applying date be on November 15th, 2005, openly day is that on April 19th, 2006, application people disclose a kind of networked video moniotring and controlling system in operation level for Shanghai Telecommunications Technological Research Institute, denomination of invention in the Chinese patent application 200510110364.6 (documents 2) of " networked video moniotring and controlling system in operation level ", and this patent application all is incorporated herein by reference at this.In documents 1 disclosed network video monitor and control system, by the IP bearer network center service platform, front terminal system and client unit subsystem are linked to each other.In addition, in documents 2, also disclose the mode by classification, set up video surveillance network with tree structure.
In documents 1 and 2, set up in a concentrated manner video surveillance network.This concentrated mode has following shortcoming.At first, the communication between the same area does not all need to transfer by Centroid, and this meeting is so that the load of Centroid is very large, and probably causes the congested of Centroid.Secondly, for logically belonging to not two terminals of same area, even they physically the distance very near and they between have direct network connection, the communication between them also needs to carry out the signaling transfer by Centroid, thereby causes the reduction of system effectiveness.In addition, if adopt the way that a certain user concentrated area is accessed a platform, this will make the user can't enjoy the premium properties that the carrier class business network brings.In large-scale application, when a certain platform can't satisfy, system need to be distributed in a plurality of platforms, thereby had lost the integrality of system, and United Dispatching is extremely difficult.
In sum, need to solve by effective technological means interconnect, the problem of multi-platform resource-sharing, to realize network platform.
Summary of the invention
In order to address the above problem, the present invention has designed the interoperability methods that is used for networked video moniotring and controlling system in operation level, is used for realizing that the flattening of a plurality of video monitoring platforms interconnects, accomplish the whole network resource United Dispatching, share.
According to a first aspect of the invention, provide a kind of for networked video moniotring and controlling system in operation level, this system comprises a plurality of territories, wherein, each territory comprises: front end unit, client unit and center service platform, and described front end unit, client unit and center service platform access respectively the IP bearer network, it is characterized in that, described a plurality of territory is interconnected by the IP bearer network, and described a plurality of territories adopt the flattening networking mode to be interconnected.
An embodiment according to a first aspect of the invention, described center service platform comprises that also center management server and video turn Dispatching Unit, wherein, between the center management server in each territory, carry out signaling communication, and front end unit, client unit and video in each territory turn and carry out media communication between the Dispatching Unit.
Another embodiment according to a first aspect of the invention, center management server storage platform static routing table, the platform static routing table is preserved the address of the center management server in each territory, wherein, between the center management server in each territory, message is carried out route according to the platform static routing table.
Another embodiment according to a first aspect of the invention, user expectation in the first territory is accessed before the front end unit in the second territory, by the center management server in described the first territory and the center management server in described the second territory described front end unit is incorporated into to this client.
Another embodiment according to a first aspect of the invention, described client unit comprises the media decodes plug-in unit of aiming field, is used for showing when aiming field front end unit to this client is incorporated in the user expectation access into the video content of this front end unit.
Another embodiment according to a first aspect of the invention, when the client in the strange land during by client unit access front end unit, the video in territory turned Dispatching Unit under Media Stream was without the client.
According to a second aspect of the invention, a kind of method for operation level Network Video Surveillance is provided, in networked video moniotring and controlling system in operation level, comprise a plurality of territories, wherein, each territory comprises: front end unit, client unit and center service platform, described front end unit, client unit and center service platform access respectively the IP bearer network, it is characterized in that, described method comprises:
By the IP bearer network described a plurality of territories are interconnected; And
Between described a plurality of territories, adopt flattening connected network communication pattern to communicate.
An embodiment according to a second aspect of the invention, described center service platform comprises that also center management server and video turn Dispatching Unit, and described method also comprises: carry out signaling communication between the center management server in each territory, and front end unit, client unit and video in each territory turn and carry out media communication between the Dispatching Unit.
Another embodiment according to a second aspect of the invention, described center management server storage platform static routing table, the platform static routing table is preserved the address of the center management server in each territory, wherein, described method also comprises: between the center management server in each territory message is carried out route according to the platform static routing table.
Another embodiment according to a second aspect of the invention, described method also comprises: the user expectation in the first territory is accessed before the front end unit in the second territory, by the center management server in described the first territory and the center management server in described the second territory described front end unit is incorporated into to this client.
Another embodiment according to a second aspect of the invention, described method also comprises: by the media decodes plug-in unit that is used for aiming field that comprises in the described client unit, show the video content of this front end unit when front end unit to this client is incorporated in the user expectation access into.
Another embodiment according to a second aspect of the invention, described method also comprises: when the client in the strange land during by client unit access front end unit, without the client under the video in territory turn Dispatching Unit and transmit Media Stream.
By using method of the present invention, can be so that realize the intercommunication of signaling, two aspects of media between a plurality of operation class video monitoring system, make the user of an operation class video monitoring platform can have the resource of a plurality of platforms and even the whole network, realize managing flexibly, having access to.Therefore, the invention provides operation class video monitoring system framework a kind of novelty, multiple domain.
In the present invention, by adopting the network configuration of flattening, can omit Centroid, thereby can not impact Internet Transmission owing to the load bottleneck of Centroid.Therefore, by adopting the network configuration of flattening, can utilize more fully the advantage of IP network.In addition, by adopting flattening interconnection mode of the present invention, can also neatly a plurality of territories be interconnected to realize intercommunication.
In addition, in the present invention, between the center management server in each territory, only carry out signaling communication, therefore, can reduce the load of center management server.
In addition, can also support client's roaming according to operation class video monitoring system of the present invention.In addition, when the client roams, can select optimum network path, thereby save network provider's network transmission resource.
Description of drawings
With reference to accompanying drawing, according to following detailed description, can more be expressly understood the present invention, wherein:
The structure chart of Fig. 1 networked video moniotring and controlling system in operation level individual domain;
Fig. 2 networked video moniotring and controlling system in operation level flattening connected network communication schematic diagram;
The flow chart that Fig. 3 cross-domain information according to the present invention is transmitted;
Fig. 4 is according to the flow chart that incorporates into for equipment of the present invention;
Fig. 5 is according to the flow chart of the process for starting real-time video of the present invention; And
Fig. 6 is according to the schematic diagram of media data roaming of the present invention.
The Concrete facts mode
For the sake of simplicity and for the purpose of clear, the unit in the accompanying drawing needn't proportionally be drawn, and in different accompanying drawings, same reference numbers represents identical unit.In addition, concisely and can be so that the present invention be not fuzzy aspect unnecessary for what describe, and omitted description and details about known steps and unit.
Those of ordinary skill in the art should be understood that the general description of front and following detailed description give an example to invention and illustrate, rather than in order to limit the invention.
Below by example technical scheme of the present invention is described.
Fig. 2 shows network topology structure figure according to an embodiment of the invention.Figure 2 illustrates three territories, is respectively territory A, B and C.Each territory comprises center service platform, front end unit and client unit, and wherein, center service platform comprises that center service manager, video turn Dispatching Unit and network video recording unit.Each territory is a basic operation platform.The video monitoring system of individual domain is commonly known in the art, for example, and such as the described single domain of earlier in respect of figures 1 system, and the single domain system described in documents 1 and 2, wherein, documents 1 and 2 all is incorporated herein by reference at this.
Adopt to carry out interconnected to each territory by the pattern of IP bearer network flattening connected network communication pattern according to the present invention.Below, with reference to Fig. 2 described flattening connected network communication pattern is described.
In flattening connected network communication pattern, each territory is in the each other status of equity in network, and the communication between each territory does not need to control through more senior control unit.
Communication between each territory is divided into signaling communication and media communication two parts.
Between the center management server (CMS) in each territory, carry out signaling communication.
Media communication comprises the transmission of media and the communication of media interviews control signal.Wherein, the video in each territory turns between the Dispatching Unit (VTDU), carries out described media communication between the front end unit (PU) in each territory and the client unit (CU).
Interconnected communication can be carried out with a plurality of territories in each territory.For realizing cross-domain access, between the CMS of each platform, use " platform static routing table " to realize the message route.For example, when business relations occured for platform A and platform B, the CMS of platform A need to register to the CMS of platform B, registered to the CMS of platform A with the CMS of rear platform B again.In the CMS of each platform, only comprise the route record that the platform of interconnect services is arranged with it.When the address of a platform changes, need in the platform static routing table of each other platform that business relations is arranged with it, upgrade the platform address of described variation.In addition, according to the present invention, can carry out standardization to message format and communication protocol between each territory.
As shown in Figure 2, according to flattening interconnected communication pattern of the present invention, signaling communication is transmitted between each center management server (CMS), and media communication turns between Dispatching Unit at front end unit, client unit and video and carries out.As shown in Figure 2, have reference point between each center management server (CMS), for example reference point M, N, O, the agreement at each reference point place is consistent.When a territory user wishes to access foreign lands' resource, the center management server in this territory (CMS) is searched at static routing table according to Target id in the instruction, finding the address of target's center's management server (CMS), and according to this address instruction is forwarded to purpose center management server (CMS).
Media communication can adopt host-host protocol and the decoding plug-in interface protocol of predesignating.For example, cross-domain media delivery can adopt the host-host protocol package of predesignating to transmit.After in aiming field transmission information being unpacked, utilize the decoding plug-in of predesignating to reduce video, the wherein said decoding plug-in of predesignating is according to the described decoding plug-in interface protocol design of predesignating.In one embodiment, can general plug-in unit be set in client unit, for example, this general plug-in unit can integrated coding/decoding method for all front end units.In another embodiment, can be the decoding plug-in interface of front end unit and client unit required standard in advance according to system of the present invention.Therefore, according to the present invention, can realize cross-domain media communication, and cross-domain video monitoring.
System according to the present invention operates according to following flow process:
1. at first the front end unit of the desired access of client is incorporated into to this client, wherein, described front end unit can be in same territory with the client or can be in different territories;
2. after equipment incorporates into, the client can incorporate front end unit to it into by its client unit request access; And
3. set up the transmission of video passage by the scheduling of CMS at client's client unit and target device (for example, front end unit, VTRU or NRU etc.), thereby client unit can be accessed the video content of front end unit.
3-6 specifically describes each process of system according to the invention operation with reference to the accompanying drawings.
At first, how to describe in pass-along message between the same area not.Fig. 3 has specifically described how to carry out the process that cross-domain information is transmitted between different territories.
I. cross-domain information transmission
Fig. 3 shows the flow chart that cross-domain information is transmitted that carries out according to an embodiment of the invention.Client unit can obtain the ID of its target front end unit that will access in advance, that is, and and Target id.According to the present invention, the first six digits of Target id is the CMSID of target front end unit place CMS.Therefore, according to Target id, the CMS at target front end unit place can judge in the CMS system.Fig. 3 shows and carry out the flow process that cross-domain information is transmitted between two CMS in the same area not, and idiographic flow is as follows:
1. initiate CMS and receive the target access request from client unit;
2. initiate target front end unit that CMS judges that client unit asks whether under this territory;
3. if the target front end unit of asking is not under this territory, then obtain the CMSID of target CMS in the territory at target front end unit place by Target id, initiate CMS and in the platform static routing table, search target CMS address according to this CMSID, and the target CMS address of passing through to find sends to target CMS with request;
4. target CMS receives described request and it is processed;
5. target CMS is to initiating the CMS return results.
In each process below, therefore the message transmission between CMS and CMS, is not described in detail as described above with reference to Figure 3 below.
According to the present invention, can utilize in client unit before the video content of front end unit, need this front end unit is incorporated into to this client unit.
II. equipment incorporates into
If front end unit and client in same territory, then only need to write for the corresponding information that this front end unit is incorporated into to this client at database.
If front end unit and client unit in different territories, are then processed by flow performing shown in Figure 4, idiographic flow is as follows:
1. the territory CMS at place, telecom client end unit forward end unit sends request, and so that this front end unit is plan to the client who asks, wherein, described telecom client end unit is such as being system manager etc.;
2. the territory CMS at front end unit place judges whether this client is the client of foreign lands;
3. if this client is the client of foreign lands, whether then the territory CMS at front end unit place judges between the territory at the current field (territory at front end unit place) and client place has route to contact; If had the route contact between the two, then jumped to the 7th step;
4. if there is no contact between two territories, then fill in the address (CMS address) in the territory at client place among the territory CMS at place, forward end unit, and, the territory CMS at front end unit place registers to the territory CMS at client place, for example, the information of registering can comprise CMSID, the network address, actual location etc.;
5. the territory CMS at client place judges whether to allow the territory at front end unit place and this territory to set up route to contact;
6. if permit to set up contact, then the territory CMS at client place again the territory CMS at place, forward end unit register;
7. the territory CMS at front end unit place incorporates request into to the territory CMS transmitting apparatus at client place;
8. the territory CMS at client place incorporates the request information such as the Target id that extracts headend equipment, title into from equipment, and described information and client unit are stored in the database accordingly.
According to the present invention, a front end unit can be incorporated into to one or more clients, and in the latter case, a plurality of clients can share a front end unit.
After incorporating into front end unit to the user, this user can access the video content that front end unit provides.Below, with reference to Fig. 5 the process that real-time video is browsed that starts is described.
III. starting real-time video browses
After telecom client end (telecommunication administration personnel) incorporates into front end unit to the client, during territory the client logins it by its client under, can show the equipment that incorporates into to this client in client unit, for example, this client can come by clicking corresponding device identification the real-time video of request access front end unit.As shown in Figure 5, start the process that real-time video browses as follows.
1. client unit wherein, is carried the information such as front end unit ID, channel number to the real-time video of initiating CMS (the territory CMS at client place) request access front end unit in the access request;
2. initiate CMS and judge whether this client unit is in the situation of accessed.If the situation of accessed is then processed CU section route (that is, the situation of media data roaming) by the flow process of Fig. 6.In addition, initiating CMS needs also to judge that front end unit is whether in this territory: if in this territory, then directly form the media interviews route and need not to ask to foreign lands again by initiating CMS;
3. if front end unit is in foreign lands, then initiate the territory CMS (target CMS) that CMS sends to described access request at the front end unit place;
4. target CMS receives described access request, and by (for example carrying out alternately with front end unit, VTDU, determine access port), and form aiming field media interviews route, the destination equipment of this aiming field media interviews route is such as being front end unit, VTDU or NRU etc.Target CMS is that described aiming field media interviews route produces a Call_ID;
5. if the destination of described aiming field media interviews route is front end unit, then target CMS forward end unit sends described Call_ID;
6. target CMS each VTDU on the described aiming field media interviews route sends media interviews address, Call_ID, and wherein, described VTDU needs to initiate to ask and the media channel of foundation and destination address.
7. target CMS determines the client unit required reference address that conducts interviews, and for example, carries out the address of VTDU or the front end unit of interface in the aiming field with the territory at client place.Target CMS returns to initiation CMS with described reference address and Call_ID;
8. initiate CMS by determining alternately media interviews route in this territory (that is, initiating territory media interviews route) with the VTDU that initiates in the territory;
9. initiate CMS and send media interviews address, Call_ID to each VTDU that initiates on the territory media interviews route;
10. initiate CMS and return media interviews address, Call_ID to client unit;
11-13. between client unit and front end unit, via described each VTDU (each VTDU in aiming field and the initiation territory), ask to set up respectively media channel at each section, wherein, described request is carried Call_ID, PUID and gap marker thereof;
14. requested each equipment is verified Call_ID, afterwards, finishes respectively the foundation of media channel at each section, thereby forms a transmission of video passage.In addition, in one embodiment, described system can also comprise authentication/authentication/charging (AAA) server, for example, final stage media providing device before client unit (for example, can be VTDU or PU etc.) when sending video data, client unit can produce charge information in beginning, and charge information is offered described authentication/authentication/accounting server.
After forming the transmission of video passage, can video content be passed to client unit from front end unit.Client unit comprises the media decodes plug-in unit of aiming field, perhaps general media decodes plug-in unit.So, can show the video content that incorporates into to described client's front end unit in client.
Below, with reference to Fig. 6 the situation that media data is roamed is described.
IV. media data roaming
Can also support the media data roaming of client unit when the accessed platform according to system of the present invention, wherein, it is that it realizes that media data transmits that described client unit can be come by means of location VTDU.
For example, client unit is when its residing place access front end unit, and the edge C MS in this place can be it media route service is provided.Below, illustrate the exemplary embodiment that media data is roamed with reference to Fig. 6.
Fig. 6 shows the schematic diagram of media data roaming, and wherein, CUa is the client unit under the CMSa, and User1 is the user under the CUa, and wherein, if User1 wishes the front end unit PUa in districts and cities B access districts and cities A, then its client unit CUa still accesses CMSa.As shown in Figure 6, the process of User1 access PUa is as follows:
1.User1 send the request that PUa is conducted interviews by CUa.CMSa is chosen at the edge C MS (being CMSb) of access locations according to specified User1 access locations in the request in the example of Fig. 6;
2.CMSa described access request is sent to CMSb;
3.CMSb be that described access request is determined the route in this territory, and routing iinformation announced to its VTDU (in example shown in Figure 6, VTDUb).Then, CMSb sends back to CMSa with the media interviews address.For example, in example shown in Figure 6, described media interviews address is the address of VTDUb;
4.CMSa be that described access request is determined the route in this territory, and routing iinformation announced its VTDU (in example shown in Figure 6, VTDUa).CMSa also sends to CUa (User1) with the media interviews address of front end unit PUa; And
5. ask respectively to connect at each section.For example, in example shown in Figure 6, form the transmission of video passage via CUa, VTDUb, VTDUa and PUa.
Can realize method and system of the present invention by variety of way.For example, can by software, hardware, firmware with and combination in any realize method and system of the present invention.The order of top method steps only adopts for illustrative purpose, unless clear and definite explanation, the step of method of the present invention is not limited to top specifically described order.In addition, in certain embodiments, the present invention can also be presented as the program that records on recording medium, and it comprises for the machine readable instructions that realizes the method according to this invention.
Although the above describes in detail specific embodiment of the present invention by example,, those of ordinary skill in the art should be appreciated that above-mentioned example only is illustrative and be not to be limitation of the present invention.Those of ordinary skill in the art should be understood that can make modification to above-described embodiment in the situation that do not break away from the spirit and scope of the present invention.Scope of the present invention is limited to the appended claims.
Claims (6)
1. interoperability methods that is used for networked video moniotring and controlling system in operation level, described networked video moniotring and controlling system in operation level comprises a plurality of territories, wherein, each territory comprises: front end unit, client unit and center service platform, described center service platform comprise that center management server and video turn Dispatching Unit; Described front end unit, client unit and center service platform access respectively the IP bearer network, by the IP bearer network described a plurality of territories are interconnected; And between described a plurality of territories, adopt flattening connected network communication pattern to communicate; It is characterized in that, described method comprises:
The center management server in described client unit territory under the client is initiated the request of the real-time video of access destination front end unit, and described target front end unit is incorporated in advance to described client unit client;
The center management server in territory judges whether described client unit is in the affiliated territory of client under the described client;
The center management server in territory judges whether described target front end unit is in the affiliated territory of described client under the described client;
If described client unit is in the affiliated territory of client, described target front end unit is in another territory in the affiliated territory of non-client, and the center management server in territory sends to described access request the center management server in described target front end unit territory of living under the described client;
The center management server in described target front end unit territory of living in receives described access request, and by with described target front end unit, described target front end unit territory of living in video turn Dispatching Unit and carry out alternately, form territory, strange land media interviews route;
Turning video in Dispatching Unit and the described target front end unit territory of living in via the video in territory under the described client between described client unit and the described target front end unit turns Dispatching Unit and sets up media transmission channel.
2. according to claim 1 method, it is characterized in that, described method also comprises: if described client unit is in another territory in the affiliated territory of non-client, and described target front end unit is in the affiliated territory of client, and the center management server in territory sends to described access request the edge center management server of described client unit place access locations under the described client;
Described edge center management server is that described access request is determined the route in the territory under described edge center management server, and routing iinformation announced to the video in the territory under the described edge center management server turn Dispatching Unit, the media interviews address is sent to the center management server in territory under the described client, described media interviews address is the address that the video in the territory turns Dispatching Unit under the described edge center management server;
The center management server in territory is that described access request is determined the route in the territory under described client under the described client, and routing iinformation announced to the video in the territory under the described client turn Dispatching Unit, the media interviews address of described target front end unit is sent to described client unit;
Turn under Dispatching Unit, the described client via the video in the territory under described client unit, the described edge center management server that the video in the territory turns Dispatching Unit and described target front end unit is set up media transmission channel.
3. method according to claim 1 is characterized in that, described method also comprises: initiate in the center management server in described client unit territory under the client before the request of real-time video of access destination front end unit,
The center management server in described target front end unit territory of living in judges whether this client unit is the client of foreign lands; If the client of foreign lands, whether then the center management server in described target front end unit territory of living in is judged between described target front end unit territory of living in and the affiliated territory of described client has route to contact;
If there is no contact between two territories, then fill in the address in territory under the client in the center management server in target front end unit territory of living in, and the center management server in described target front end unit territory of living in center management server in territory under the described client is registered;
The center management server in territory judges whether that allowing to set up route with described target front end unit territory of living in contacts under the described client;
If permit setting up contact, then the center management server in territory is registered to the center management server in described target front end unit territory of living in again under the described client;
The center management server in described target front end unit territory of living in center management server transmitting apparatus in territory under the described client incorporates request into; And
The center management server in territory incorporates the information of extracting described target front end unit the request into from described equipment under the described client, with realization described target front end unit is incorporated into to described client.
4. method according to claim 3, it is characterized in that, the center management server in the described target front end unit territory of living in log-on message that the center management server in territory is registered under the described client comprises ID, the network address, the actual location of the center management server in described target front end unit territory of living in.
5. method according to claim 3 is characterized in that, described method also comprises: the center management server in territory incorporates the id information that extracts described target front end unit the request into from described equipment under the described client; And described information and described client unit is stored in the database explicitly.
6. method according to claim 1 and 2 is characterized in that, the center management server in described target front end unit territory of living in turns Dispatching Unit to the video on the described strange land territory media interviews route and sends the media interviews address and call out ID.
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| Publication number | Priority date | Publication date | Assignee | Title |
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