CN101753985B

CN101753985B - Video monitoring system, and medium flow transmitting control device and method in the video monitoring system

Info

Publication number: CN101753985B
Application number: CN200810227558A
Authority: CN
Inventors: 高春东; 邓中翰; 俞青
Original assignee: Vimicro Corp
Current assignee: Mid Star Technology Ltd By Share Ltd; Vimicro Corp
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2012-10-03
Anticipated expiration: 2028-11-27
Also published as: CN101753985A

Abstract

The present invention discloses a video monitoring system, and medium flow transmitting control device and method in the video monitoring system. In the present invention, control layer equipment is connected with a plurality of bearing layer equipment. Therefore, when the condition of any bearing layer equipment changes into abnormal, the control layer equipment can be used for detecting according to the conditions of a plurality of bearing layer equipment, and is used for selecting the bearing layer equipment in a normal condition in the plurality of bearing layer equipment to realize the colony control tactics of medium flow transmission. Another bearing layer equipment in a normal condition is randomly selected to ensure that the medium flow transmission between the front-end equipment and a CE can not be cut, and thus, the reliability of the medium flow transmission can be improved.

Description

Medium flow transmitting control device and method in video monitoring system and this system

Technical field

The present invention relates to control technology, medium flow transmitting control device and method in particularly a kind of video monitoring system and this system.

Background technology

The video monitoring system of existing IP based network; Mainly comprise video monitoring video camera, digital video frequency server (Digital Video Server; DVS), digital video recorder (Digital VideoRecorder; Headend equipment such as DVR) also comprises the IP transmission network that is used to realize video transmission, is used to the client that realizes the network video monitoring platform of equipment unified management and central store and be used for video data is presented at personal computer (PC) or TV.

Yet the headend equipment in the video monitoring system of above-mentioned existing IP based network and the all-IPization that is unrealized, especially this system is the equipment that DVS, DVR etc. do not connect through IP network, thereby has following problem:

1, equipment such as DVS, DVR then need link to each other with analog video camera through analog cable, and difficult wiring and cost of equipment maintenance are high;

2, video definition standard line-by-line inversion (the Phase Alternating Line of analog video camera; PAL) or national television system committee (National Television System Committee; NTSC) be the standard of the seventies in last century six; The high definition of its regulation is merely (720 * 576), has hindered the development of video monitoring to HD video;

3, equipment such as DVS, DVR need be connected in the video system based on the port of self, and the port of equipment such as DVR, DVS is numerous, makes configuration of devices comparatively complicated, and very difficult discovery automatically and the automatic configuration feature realized;

4, equipment such as DVS, DVR uses hardware integrated circuit board standard, and the function difference of each manufacturer's customization is big, needs to formulate different access waies to the equipment of different vendor;

5, equipment such as DVS, DVR does not have the smart machine access interface, has hindered the development of video monitoring to intelligent video.

Visible by the problems referred to above; The video monitoring system and the all-IPization that is unrealized of existing IP based network, and then the difficulty that makes networking connect up versatility big, system configuration is relatively poor and realization is comparatively complicated, also hindered video monitoring to HD video and intelligentized development simultaneously.

And; The video monitoring system and the all-IPization that is unrealized of existing IP based network; Also make unintelligible, the disunity of system architecture; And the communication protocol in the system is chaotic, lack of standardization, can't realize that especially the multistage multiple domain of a plurality of video monitoring systems interconnects, thereby can't unitize management and infinite cascade expansion.

Summary of the invention

In view of this, the invention provides medium flow transmitting control device and method in a kind of video monitoring system and this system, can realize the video monitoring of all-IPization and improve the reliability of media flow transmission.

A kind of video monitoring system provided by the invention, this system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and bearing layer equipment, the headend equipment that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

Said access layer equipment accesses to said CE and said headend equipment in the said system based on the control of said key-course equipment;

Said bearing layer equipment is realized the media flow transmission between said headend equipment and the said CE based on the control of said key-course equipment;

Wherein, said bearing layer equipment is a plurality of, and a plurality of said bearing layer equipment links to each other with a said key-course equipment through said IP network; Said headend equipment links to each other through said IP network with a plurality of said bearing layer equipments with said CE simultaneously;

In the said key-course equipment, dispose the cluster control strategy that is used for selecting the said bearing layer equipment realization media flow transmission of normal condition from a plurality of said bearing layer equipments; And; Said key-course equipment also is used to detect the state of a plurality of said bearing layer equipments; And according to the state and the said cluster control strategy of detected a plurality of said bearing layer equipments, the normal said bearing layer equipment of selection mode is realized the media flow transmission between said headend equipment and the said CE.

Said state comprises running status;

Said key-course equipment is to a plurality of said bearing layer equipment transmit status query requests; In the predetermined period after the transmit status query requests, do not receive the correct status poll response of running status of this bearing layer equipment of expression of said bearing layer equipment feedback, confirm that the state of this bearing layer equipment is unusual by normally becoming.

Said state further comprises load condition;

When the load capacity that said key-course equipment further carries is higher than the normal preset first threshold value of expression load, confirm that the state of this bearing layer equipment is unusual by normally becoming in said status poll response;

Perhaps, said key-course equipment further is higher than the load overload notification that initiatively reports when the expression load is preset second threshold value normally according to said bearing layer equipment in load capacity, confirms that the state of this bearing layer equipment is unusual by normally becoming.

Said state further comprises Link State;

The link failure that said key-course equipment further reports according to said bearing layer equipment is notified or by the link failure notice that said headend equipment under the Media Stream of this bearing layer equipment carrying or said CE report, is confirmed that the state of this bearing layer equipment is unusual by normally becoming.

Medium flow transmitting control device in a kind of video monitoring system provided by the invention, said video monitoring system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and a plurality of bearing layer equipments, the headend equipment that links to each other through said IP network with the said bearing layer equipment of said access layer equipment and each respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

Said access layer equipment accesses to said CE and said headend equipment in the said system based on the control of said key-course equipment; Said bearing layer equipment is realized the media flow transmission between said headend equipment and the said CE based on the control of said key-course equipment;

This device is arranged in the said key-course equipment, and comprises:

The policy configurations module wherein disposes the cluster control strategy that is used for selecting from a plurality of said bearing layer equipments the said bearing layer equipment realization media flow transmission of normal condition;

State detection module is used to detect the state of a plurality of said bearing layer equipments;

Policy enforcement module is used for state and said cluster control strategy according to detected a plurality of said bearing layer equipments, and the normal said bearing layer equipment of selection mode is to realize the media flow transmission between said headend equipment and the said CE.

Said state comprises running status;

Said state detection module is to a plurality of said bearing layer equipment transmit status query requests; In the predetermined period after the transmit status query requests, do not receive the correct status poll response of running status of this bearing layer equipment of expression of said bearing layer equipment feedback, confirm that the state of this bearing layer equipment is unusual by normally becoming.

Said state further comprises load condition;

When the load capacity that said state detection module further carries is higher than the normal preset first threshold value of expression load, confirm that the state of this bearing layer equipment is unusual by normally becoming in said status poll response;

Perhaps, said state detection module further is higher than the load overload notification that initiatively reports when the expression load is preset second threshold value normally according to said bearing layer equipment in load capacity, confirms that the state of this bearing layer equipment is unusual by normally becoming.

Said state further comprises Link State;

The link failure that said state detection module further reports according to said bearing layer equipment is notified or by the link failure notice that said headend equipment under the Media Stream of this bearing layer equipment carrying or said CE report, is confirmed that the state of this bearing layer equipment is unusual by normally becoming.

Media flow transmission control method in a kind of video monitoring system provided by the invention, said video monitoring system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and a plurality of bearing layer equipments, the headend equipment that links to each other through said IP network with the said bearing layer equipment of said access layer equipment and each respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

And dispose the cluster control strategy that is used for selecting from a plurality of said bearing layer equipments the said bearing layer equipment realization media flow transmission of normal condition in the said key-course equipment, this method comprises:

The state of a plurality of said bearing layer equipments of said key-course Equipment Inspection;

Said key-course equipment is according to the state and the said cluster control strategy of detected a plurality of said bearing layer equipments, and the normal said bearing layer equipment of selection mode is to realize the media flow transmission between said headend equipment and the said CE.

Said state comprises running status;

The state of a plurality of said bearing layer equipments of said detection comprises: to a plurality of said bearing layer equipment transmit status query requests; In the predetermined period after the transmit status query requests, do not receive the correct status poll response of running status of this bearing layer equipment of expression of said bearing layer equipment feedback, confirm that the state of this bearing layer equipment is unusual by normally becoming.

Said state further comprises load condition;

The state of a plurality of said bearing layer equipments of said detection further comprises: when the load capacity of in said status poll response, carrying is higher than the normal predetermined threshold value of expression load, confirm that the state of this bearing layer equipment is unusual by normally becoming; Perhaps, be higher than the load overload notification that initiatively reports when the expression load is preset second threshold value normally in load capacity, confirm that the state of this bearing layer equipment is unusual by normally becoming according to said bearing layer equipment.

Said state further comprises Link State;

The state of a plurality of said bearing layer equipments of said detection further comprises: the link failure according to said bearing layer equipment reports is notified or is notified by the link failure that said headend equipment under the Media Stream of this bearing layer equipment carrying or said CE report, and confirms that the state of this bearing layer equipment is unusual by normally becoming.

Visible by technique scheme; Not only realized the video monitoring of all-IPization in the present invention; And a key-course equipment connects a plurality of bearing layer equipments; Thereby become when unusual when the state of any bearing layer equipment; Can be by key-course equipment according to the state-detection of a plurality of bearing layer equipments and be used for selecting the said bearing layer equipment of normal conditions to realize the cluster control strategy of media flow transmission from a plurality of said bearing layer equipments, the optional normal bearing layer equipment of another state guarantees to realize that the media flow transmission between headend equipment and the CE can not interrupt, thereby can improve the reliability of media flow transmission.

Description of drawings

Fig. 1 is the video monitoring system logical layer structure sketch map of IP based network among the present invention;

Fig. 2 is the system architecture sketch map of the video monitoring system of IP based network among the present invention;

Fig. 3 is the system interface sketch map of the video monitoring system of IP based network among the present invention;

Fig. 4 is the single domain networking structure sketch map of the video monitoring system of IP based network among the present invention;

Fig. 5 is a kind of schematic flow sheet of exchange method in the video monitoring system of IP based network among the present invention;

Fig. 6 is the another kind of schematic flow sheet of exchange method in the video monitoring system of IP based network among the present invention;

Fig. 7 is for comprising a kind of exemplary block diagram of the video monitoring system of a plurality of headend equipments in the embodiment of the invention;

Fig. 8 is for comprising the another kind of exemplary block diagram of the video monitoring system of a plurality of headend equipments in the embodiment of the invention;

Fig. 9 is the exemplary block diagram of medium flow transmitting control device in the embodiment of the invention;

Figure 10 is the exemplary process diagram of media flow transmission control method in the embodiment of the invention.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.

Fig. 1 is the video monitoring system logical layer structure sketch map of IP based network among the present invention.As shown in Figure 1, in invention, in the video monitoring system of IP based network, can comprise 4 logical layers: Access Layer 101, bearing bed 102, key-course 103 and operation layer 104.

1) Access Layer 101 is supported IP agreement, TCP (Transmission Control Protocol; Transmission control protocol), UDP (User Datagram Protocol; UDP) and SIP (SessionInitiation Protocol; Session initiation protocol) etc. transmission control protocol is used for the access of the various end points of video monitoring.Wherein, end points can specifically comprise subscriber endpoints, Media Stream end points and alarm end points, and the alarm end points is optional and inessential.

2) bearing bed 102, are used for carrying the Media Stream of video monitoring, comprise the forwarding distribution of Media Stream, the bottom transmission of Media Stream; Alternatively, bearing bed 102 can also be further used for the storage of Media Stream.

For the forwarding distribution of the Media Stream of bearing bed 102, can transmit distribution function by the medium that logically mark off in the bearing bed 102 and realize.Functions such as medium transmit that distribution function can be used for the duplicating of Media Stream, transmits, distributes, broadcasting, multicast and route.

Bottom transmission for the Media Stream of bearing bed 102 can be realized by the bottom transport function that logically marks off in the bearing bed 102.The bottom transport function can be used for controlling the transmission of signaling and notice signaling.Wherein, control signaling and notice signaling all can be the signaling of Session Initiation Protocol, and can use socket (Socket) connection and content among the TCP to carry extend markup language (eXtensibleMarkup Language, XML) message semantic definition of form.Wherein, notice signaling is an optional signaling and nonessential.

Certainly, the bottom transport function also is used to realize the transmission of Media Stream.Specifically; Transmission to Media Stream; The media stream formats that each logical layer equipment in can the employing system is supported; And select to use H.264, dynamic image expert group (Moving Pictures Experts Group, MPEG-4), (Audio and Video Coding Standard, AVS) etc. agreement encapsulates Media Stream digital audio/video encoding and decoding technique standard.

Storage for the Media Stream of bearing bed 102 can be realized by the media store functional module that logically marks off in the bearing bed 102.The media store functional module can be used for reception, the storage of Media Stream; This media store functional module can insert storage area network network (Storage Area Network; IP-SAN), network attached storage (Network Attached Storage; NAS), direct-connected mode is stored (DirectAttached Storage, DAS) memory device such as IP such as grade; And; The media store functional module can also be further used for storage plan management, storage medium management and playing back videos service etc.; For example, formulate storage plan according to the characteristic of time, each logical layer equipment, alarm type etc., supply the media store functional module to carry out by the user.

3) key-course 103, be used for video monitoring system session control and audio frequency and video distribution management (Audioand Video Distribute Management, AVDM); Alternatively, key-course 103 can also be further used for the audio frequency and video storage administration (Audio and Video Storage Management, AVSM), end points management, rights management etc.

For the session control of key-course 103, can realize by the session control function module that logically marks off in the key-course 103.Session control function module can be used for interior all professional controls of video monitoring system of IP based network among the present invention.And; Operation layer 104 among the present invention can carry out professional foundation, uses and cancel operation through Session Initiation Protocol; Thereby the session control function module in the key-course 103 is inner can set up professional controll block, time controll block and the resources control block etc. that be used for controlling this business to this business, and safeguards professional controll block, time controll block and the resources control block of being set up etc.

For the AVDM and the AVSM of key-course 103, can realize by AVDM functional module that logically marks off in the key-course 103 and AVSM functional module respectively.The AVDM functional module is used to carry out media flow transmission control, the control of controlling signaling and notice signaling and load balancing policy control, the needed sound mixing function of voice video conference; The AVSM functional module is used for the control to the media store functional module of bearing bed 102.

End points management for key-course 103 can be realized by the end points management function module that logically marks off in the key-course 103.End points management function module can be used in the video monitoring system to IP based network among the present invention; The equipment of each end points such as the subscriber endpoints of all accesses, Media Stream end points and alarm end points is managed; Through to the facility information of the said equipment and the abstract storage that is recorded in the user profile of system; Through static configuration to the database in the system; Carry out each logical layer configuration of devices and attribute management through network management unit, make the video monitoring system of IP based network among the present invention have the ability of overall unified management and each logical layer equipment of planning.Wherein, the said equipment information can comprise information such as device identification, device attribute, and above-mentioned user profile then can comprise information such as ID, user property; Database in the aforesaid system can be shared by each logical layer usually and use, thereby does not combine a certain logical layer to describe in this article separately.

For the rights management of key-course 103, can realize by the rights management functional module that logically marks off in the key-course 103.The rights management functional module can be used for confirming the rights of using of user to the various resources in the video monitoring system of IP based network among the embodiment.

4) operation layer 104, are used for realizing basic business in the video monitoring system of IP based network of the present invention at least, as the professional intellectual analysis of formulating reference etc.

For the basic business in the operation layer 104, can realize by the basic business functional module that logically marks off in the operation layer 104.The basic business functional module can be used for providing the basic service of the video monitoring system of IP based network among the present invention, for example monitoring in real time, on-demand playback, cradle head control, storage plan, access control, batch configuration etc.The user can use basic service through the CE client in the Access Layer.

For the intellectual analysis in the operation layer 104, can realize by the intellectual analysis functional module that logically marks off in the operation layer 104.The intellectual analysis functional module can be used for providing the IN service of the video monitoring system of IP based network among the present invention, through combining of intellectual technology and upper layer application, satisfies the demand of user to system.For example: object tracking (Motion Tracking); Recognition of face (FacialDetection); Vehicle identification (Vehicle Identification); Illegal be detained (Object Persistence); Pyrotechnics detects (Fire Detection); People flow rate statistical (People Counting); People's group control (FlowControl); Human body behavioural analysis (Action Analyze); Magnitude of traffic flow control (Traffic Flow); Advanced video mobile detection (Advanced VMD); Article lost or displacement detecting (MovingDetection) etc.

Need to prove that each functional module in the operation layer 104 mainly is in order to make among the present invention the video monitoring system of IP based network video monitoring function can be provided with the mode of business, and other business functions can be provided further.Certainly; Directly under the control of key-course 103, obtain and distribution media stream if break away from professional through Access Layer 101 by bearing bed 102; Then also can realize video monitoring, thereby operation layer 104 is optional and nonessential for the video monitoring system of IP based network among the present invention.

The various functional modules of mentioning in the above-mentioned logical layer structure all can be realized through computer program by those skilled in the art, give unnecessary details no longer one by one at this.

Below, based on above-mentioned logical layer structure, the system architecture of the video monitoring system of IP based network in the embodiment of the invention is elaborated.

Fig. 2 is the system architecture sketch map of the video monitoring system of IP based network among the present invention in fact.As shown in Figure 2, in the present invention, the system architecture of the video monitoring system of IP based network comprises the access layer equipment of corresponding Access Layer 101, the bearing layer equipment of corresponding bearing bed 102, the key-course equipment of corresponding key-course 103.

1) access layer equipment of corresponding Access Layer 101 comprises: the client unit of respective user end points (Client Element; CE) 201, the headend equipment 202 of corresponding Media Stream end points or alarm end points and be used for CCF that CE 201, headend equipment 202 insert (Call Control Function, CCF) server 203.

Preferably, CCF server 203 can provide SIP gateway and safe access gateway.

Preferably; CE 201 can specifically be divided into client/server (Client/Serve; C/S) architecture mode and browser/server (Browser/Server; B/S) architecture mode is two kinds; And CE 201 can support that real-time video, on-demand playback, Real-time Alarm, alarm interlock, round cut plan, the group plan of cutting, crowd's plan of cutting, user's login, rights management, equipment control, batch configuration, the track that cruises, cradle head control, transparent channel, storage administration, storage plan, voice broadcast service, speech talkback, video recording download, management of video, group Role Management, equipment incorporate into, (Geographic Information System GIS) waits network video monitor and control system professional to GIS-Geographic Information System.

Preferably, headend equipment 202 can be that for example medium stream information such as IP Camera, IP The Cloud Terrace equipment provides equipment, is used for the collection and the output of video information, audio-frequency information, data message, intellectual analysis information and warning information; Alternatively; Headend equipment 202 can link to each other with smart machine 202 ' through for example electric connection mode such as analog line, embedding; Perhaps also can link to each other with smart machine 202 ' through IP network; This smart machine 202 ' also links to each other through IP network with CCF server 203 simultaneously, so that access in the video monitoring system through CCF server 203; Certainly, for the system that comprises optional alarm end points, headend equipment 202 can also be safety-security area equipment such as gate inhibition's equipment, infrared equipment, smoke sensing equipment, intelligent alarm analytical equipment for example.

And; Above-mentioned CE 201 supports the Session Initiation Protocol expansion with headend equipment 202; Support RTP (Real-time Transport Protocol; RTP), (Real-timeTransport Control Protocol is RTCP) with real-time fluidisation agreement (Real-time StreamingProtocol, media flow transmission control protocol such as RTSP) for RTCP Real-time Transport Control Protocol.

2) bearing layer equipment of corresponding bearing bed 102 comprises: (Audio and VideoDistribute Function, AVDF) server 204 for the audio frequency and video distribution function.Medium in the foregoing bearing bed 102 are transmitted distribution function and are carried in the AVDF server 204.

3) the key-course equipment of corresponding key-course 103 comprises: (Service ManagerFunction, SMF) server 206 for service management function.Session control function module and AVDM functional module in the foregoing key-course 103 are carried in the SMF server 206.

In addition; For the basic business functional module in the foregoing optional operation layer 104, intellectual analysis functional module, interlock configuration feature module, then can carry jointly by all included access layer equipments of the video monitoring system of IP based network in the present embodiment, all bearing layer equipments, all key-course equipment.

Still referring to Fig. 2, in the present embodiment in the video monitoring system of IP based network:

CE201, headend equipment 202 link to each other through IP network with CCF server 203 respectively, access to through CCF server 203 in the video monitoring system of IP based network in the present embodiment;

CCF server 203 and SMF server 206 link to each other through IP network, based on the session control of SMF server 206, realize the access of CE 201, headend equipment 202;

CE 201, headend equipment 202 link to each other through IP network with AVDF server 204 respectively, through AVDF server 204 media streams;

AVDF server 204 and SMF server 206 link to each other through IP network, based on the session control of SMF server 206, realize the media flow transmission relevant treatment between headend equipment 202 and the CE 201.Specifically; AVDF server 204 be used for from the Media Stream between headend equipment and the CE receive, duplicate, transmit, distribution, route, multicast and broadcasting etc. transmit the distribution relevant treatment; Realize the video monitoring of the video monitoring session of CE 201 and headend equipment 202, promptly realize video monitoring this headend equipment 202 place scenes; AVDF server 204 is further used for controlling bottoms such as the transmission transmission relevant treatment of signaling and notice signaling.

SMF server 206 is used to realize above-mentioned session control.In the practical application, a SMF server 206 can connect a plurality of CCF servers 203 and carry out load balancing control; A plurality of CCF servers 203 can provide the access of any equipment that can connecting system of CE 201, headend equipment 202 or other of broad range; And CCF server 203 can further be supported network address translation (Network Address Translation, NAT) gateway in the wide area network as gateway.

Mentioned among this paper " linking to each other " through IP network; Can adopt the existing concrete mode that connects through IP network arbitrarily; For example; Each logical layer equipment can be connected same switching equipment in the IP network or be connected to the different switching equipment in the IP network, and alternate manner is given unnecessary details at this no longer one by one.

Alternatively; The video monitoring system of IP based network among the present invention; Its bearing layer equipment can further include audio frequency and video memory function (Audio and Video Storage Function; AVSF) server, this AVSF server link to each other through IP network with SMF server 206 and AVDF server 204 respectively, and the media store functional module in the foregoing bearing bed 102 is carried in the AVSF server; And key-course equipment can further include subscription authentication function (User AuthenticationFunction; UAF) server; This UAF server and SMF server 206 link to each other through IP network; For optional end points management function module and rights management functional module in the key-course 103 as previously mentioned, can carry jointly by SMF server 206 and UAF server.

Fig. 3 is the system interface sketch map of the video monitoring system of IP based network in the embodiment of the invention one.As shown in Figure 3, in the present embodiment in the video monitoring system framework of IP based network as shown in Figure 2:

Adopt Icc interface (Interface of CE and CCF) 301 between CE 201 and the CCF server 203, interface communication uses Session Initiation Protocol;

Adopt Icn interface (Interface of CCF andNE) 302a between headend equipment 202 and the CCF server 203, interface communication uses Session Initiation Protocol; Need to prove that " NE " among this paper in the related English full name of each english abbreviation only representes headend equipment 202 in this article;

The smart machine 202 ' that is electrically connected with headend equipment 202 adopts Ici interface (Interface of CCF and Intelligent Device) 302b then and between the CCF server 203, and interface communication uses Session Initiation Protocol;

Adopt Isc interface (Interface of SMFand CCF) 303 between CCF server 203 and the SMF server 206, interface communication uses Session Initiation Protocol;

Adopt Isd interface (Interface of SMFand AVDF) 304 between AVDF server 204 and the SMF server 206, interface communication uses the Socket agreement;

Adopt Idc interface (Interface of AVDF andCE) 308 between CE 201 and the AVDF server 204, interface communication uses RTP or RTCP or RTSP agreement;

Adopt Ind interface (Interface ofNE andAVDF) 309 between headend equipment 202 and the AVDF server 204, interface communication uses RTP or RTCP or RTSP agreement.

In addition, adopt Iss interface (Interface of SMF and AVSF) between optional AVSF server and the SMF server 206, interface communication uses the Socket agreement; Adopt Isu interface (Interface of SMF and UAF) between optional UAF server and the SMF server 206, interface communication uses Session Initiation Protocol.

Fig. 4 is the single domain networking structure sketch map of the video monitoring system of IP based network in the embodiment of the invention.As shown in Figure 4; In the present embodiment in the video monitoring system of IP based network; For the situation that only comprises a SMF server 206; Be referred to as the single domain networking structure, this system specifically comprises: CE201, headend equipment 202, CCF server 203, AVDF server 204, SMF server 206, not shown optional AVSF server and UAF server among Fig. 4.

Fig. 5 is a kind of schematic flow sheet of exchange method in the video monitoring system of IP based network in the embodiment of the invention.As shown in Figure 5; In the video monitoring system of IP based network as shown in Figure 4, can carry out the mutual of media flow transmission control according to following flow process between CE 201, headend equipment 202, CCF server 203, AVDF server 204, the SMF server 206 in the present embodiment:

Step 501, CE 201 sends first request message that obtains Media Stream through IP network to CCF server 203, for example is called the message of " INVITE ", the Media Stream of the arbitrary headend equipment 202 of expression acquisition request;

Step 502, CCF server 203 are returned the session (Session) that for example is called first response message of " 100 " message and preserves this request correspondence according to first request message from CE 201 through IP network to CE 201;

Step 503; CCF server 203 is according to first request message from CE 201; The message etc. of sending for example " INVITE " by name through IP network to SMF server 206 is obtained second request message of Media Stream, is forwarded to SMF server 206 with the request with CE 201; Second request message described herein can be first request message of directly transmitting with the transparent transmission mode, also can be the request message that is generated separately by CCF server 203;

Step 504, SMF server 206 returns second response message through IP network to CCF server 203 according to second request message that obtains Media Stream from CCF server 203;

Step 505, SMF server 206 judge whether headend equipment 202 has been set up media flow transmission interface as shown in Figure 4 with AVDF server 204 and be connected 413; If, then direct execution in step 509, otherwise execution in step 506;

Step 506, SMF server 206 are sent the 5th request message of expression application ports such as " INVITE " message by name for example through IP network and forward end equipment 202, with 202 applications of forward end equipment can output media stream port;

Step 507, headend equipment 202 distributes corresponding port, returns the 5th response message that expression ports such as for example being called " 200OK " message has distributed through IP network and to SMF server 206;

Step 508; The 5th response message that the expression port that SMF server 206 is returned after the distribution corresponding port according to headend equipment 202 has distributed; Send the 3rd ACK that confirms that port has distributed through IP network and forward end equipment 202; After this, headend equipment 202 is promptly set up media flow transmission interface as shown in Figure 4 through IP network and AVDF server 204 and is connected 413;

Step 509, SMF server 206 returns the 3rd response message that the for example expression video capable monitor sessions such as message of " 200 OK " by name can be set up through IP network to CCF server 203;

Step 510, CCF server 203 are returned the 4th response message that the for example expression video capable monitor sessions such as message of " 200 OK " by name can be set up according to the 3rd response message from SMF server 206 to CE 201; Need to prove that the 4th response message described herein can be the 3rd response message of directly transmitting with the transparent transmission mode, also can be the response message that is generated separately by CCF server 203;

Step 511, CE 201 sends a ACK that expression confirm video monitoring session can set up through IP network to CCF server 203 according to the 4th response message from CCF server 203;

Step 512, CCF server 203 is confirmed the ACK that the video monitoring session can be set up according to the expression from CE 201, sends the 2nd ACK that expression confirms that the video monitoring session can be set up through IP network to SMF server 206; Need to prove that the 2nd ACK described herein can be an ACK who directly transmits with the transparent transmission mode, also can be the ACK that is generated separately by CCF server 203;

Step 513; SMF server 206 is confirmed the 2nd ACK that the video monitoring session can be set up according to the expression from CCF server 203; Through the request message of IP network to AVDF server 204 transmission open media flow ports, for example PortOpenNotify request message;

Step 514; AVDF server 204 bases are from the request message of the open media flow port of SMF server 206; Through its with corresponding headend equipment 202 between the media flow transmission interface of IP based network connect 413; Open this headend equipment 202 can output media stream port, and return the response message of opening of " Response " message by name for example through IP network and to SMF server 206;

Step 515; CE 201 AVDF server 204 opened corresponding headend equipment 202 can the port of output media stream after; Set up media flow transmission interface as shown in Figure 4 through IP network and AVDF server 204 and be connected 411; And through with AVDF server 204 between the media flow transmission interface of IP based network be connected 411, the media flow transmission interface of IP based network is connected 413 between AVDF server 204 and AVDF server 204 and the headend equipment 202, carries out the mutual of Media Stream based on video monitoring session and headend equipment 202.

So far, this flow process finishes.

In the above-mentioned flow process, step 502,504 is optional step, and step 503 can be carried out before step 502 or with step 502 simultaneously, and step 505 can be carried out before step 504 or with step 504 simultaneously; And be connected 413 situation through having set up the media flow transmission interface with AVDF server 204 for headend equipment 202, step 505～508 also are optional step.

Fig. 6 is the another kind of schematic flow sheet of exchange method in the video monitoring system of IP based network in the embodiment of the invention.As shown in Figure 6; Based on the video monitoring system of IP based network in the present embodiment and after flow process as shown in Figure 5; In the present embodiment in the video monitoring system of IP based network as shown in Figure 4; Between CE 201, headend equipment 202, CCF server 203, AVDF server 204, the SMF server 206, can also further realize the mutual of media flow transmission control according to following flow process:

Step 601, CE 201 passes through IP network and sends the 6th request message that the for example expression of " BYE " message by name stops the video monitoring session, the video monitoring session between request termination and the headend equipment 202 to CCF server 203;

Step 602; CCF server 203 is according to the 6th request message from CE 201; Through sending the 7th request message that expression stops the video monitoring session, be forwarded to SMF server 206 with request with the video monitoring session between CE 201 terminations and the headend equipment 202 to SMF server 206; Need to prove that the 7th request message described herein can be the 6th request message of directly transmitting with the transparent transmission mode, also can be the request message that CCF server 203 generates separately;

Step 603, SMF server 206 are sent the request message of closing Media Stream port, for example PortCloseNotify request message through IP network to AVDF server 204 according to the 7th request message from CCF server 203;

Step 604; AVDF server 204 bases are from the request message of the open media flow port of SMF server 206; Through its with corresponding headend equipment 202 between the media flow transmission interface of IP based network connect 413; Close the port that this headend equipment 202 can output media stream, and return the for example response closing message of " Response " message by name to SMF server 206 through IP network;

Step 605; SMF server 206 stops the media flow transmission interface 411 between CE 201 and the ASDF server 204 according to response closing message, and sends the 6th response message that expression video monitoring sessions such as for example being called " 200OK " message stops through IP network to CCF server 203;

Step 606; CCF server 203 is according to the 6th response message; Send the 7th response message that expression video monitoring sessions such as for example being called " 200OK " message stops through IP network to CE 201; CE201 after receiving the 7th response message, break off with AVDF server 204 between the media flow transmission interface of IP based network be connected 411, thereby stop the video monitoring session with headend equipment 202; Need showing of explanation, above-mentioned the 7th response message can be the 6th response message of directly transmitting with the transparent transmission mode, also can be the message that is generated separately by CCF server 203;

Step 607, whether SMF server 206 is judged the video monitoring session of current termination, be last video monitoring session of corresponding front end interface 202, if, then continue execution in step 608, otherwise process ends;

Step 608, SMF server 206 sends the 8th request message that " BYE " message etc. for example by name is cancelled port through IP network and forward end equipment, with forward end equipment 202 cancel can output media stream port;

Step 609; When front end equipment 202 cancelling corresponding port, and the expression ports such as " 200OK " message for example by name that returned the 8th response message of having cancelled after, headend equipment 202 has broken off and has passed through IP network and be connected 413 with media flow transmission interface between the AVDF server 204.

So far, this flow process finishes.

In the above-mentioned flow process, step 605,606 is optional step, and step 607 can be carried out before step 605 or step 606, also can carry out simultaneously with step 605 or step 606; And, be connected also nonessentially with media flow transmission interface 413 between the AVDF server 204 owing to break off headend equipment 202, therefore, step 607～609 also are optional step.

It is thus clear that among the present invention in the video monitoring system of IP based network, the connection between CE, headend equipment and each the logical layer equipment all realizes through IP network, thereby realized the all-IPization of video monitoring system.

More than, be detailed description to the video monitoring system of IP based network among the present invention.

Though only show a CE 201 and a headend equipment 202 among Fig. 4, in the practical application, CE 201 and headend equipment 202 all can be for a plurality of, and be as shown in Figure 7.For this situation, if a SMF server 206 only connects an AVDF server 204 in system as shown in Figure 4, though then this video monitoring system can guarantee the realization of video monitoring can have following problem:

When AVDF server 204 self breaks down and causes running status unusual; Perhaps when AVDF server 204 causes load condition unusual owing to the headend equipment 202 of a greater number that connects, again or when the Link State between AVDF server 204 and headend equipment 202 or the CE 201 is unusual, the Media Stream of exporting with these AVDF server 204 continuous headend equipments 202 can't transfer to corresponding CE 201.

It is thus clear that; Only be connected with an AVDF server 204 owing to a SMF server in the video monitoring system as shown in Figure 4; Thereby can't when various abnormal state appears in AVDF server 204, guarantee effective transmission of Media Stream, thereby make that the reliability of media flow transmission is not high.

Thus, present embodiment also further provides a kind of and can improve the improvement video monitoring system of media flow transmission reliability and a kind of medium flow transmitting control device and method of video monitoring system based on video monitoring system as shown in Figure 4.

Fig. 8 is for comprising the another kind of exemplary block diagram of the video monitoring system of a plurality of headend equipments in the embodiment of the invention.As shown in Figure 8; The video monitoring system of present embodiment is the video monitoring system of IP based network, and this system comprises following each layer equipment and the server identical with existing video monitoring system at least: the CE 201 of Access Layer, headend equipment 202, CCF server 203; The AVDF server 204 of bearing bed; The SMF server 206 of key-course.

CE 201 can be for one or more with headend equipment 202, and each CE 201 and headend equipment 202 link to each other through IP network with CCF server 203 respectively, access in the present embodiment video monitoring system as shown in Figure 8 through CCF server 203.

CCF server 203 and SMF server 206 link to each other through IP network, are used under the control of SMF server 206, realizing the access of each CE 201 and each headend equipment 202.

Each CE 201 and headend equipment 202 link to each other through IP network with AVDF server 204 respectively, the media flow transmission that realizes between CE 201 and the headend equipment 202 through AVDF server 204.

AVDF server 204 and SMF server 206 link to each other through IP network, are used in the media flow transmission that realizes under the control of SMF server 206 between any CE 201 and any headend equipment 202.

Than video monitoring system as shown in Figure 7, in present embodiment video monitoring system as shown in Figure 8, there are a plurality of AVDF servers 204 to link to each other with a SMF server 206 through IP network, constitute a server pools (AVDF POOL); And each CE 201 and headend equipment 202 respectively with AVDF POOL in each AVDF server 204 link to each other through IP network; Be each CE 201 with each headend equipment 202 simultaneously with AVDF POOL in a plurality of AVDF servers 204 link to each other the network structure of formation multi-to-multi through IP network.

And; In the SMF server 206; Dispose the cluster control strategy, this cluster control strategy is used for SMF server 206 and can selects any one or more AVDF servers 204 of normal condition to realize media flow transmission from the AVDF POOL of a plurality of AVDF servers 204 formations.

Like this; SMF server 206 is except realizing existing capability; Also be used for detecting the state of a plurality of AVDF servers 204 of AVDF POOL; And according to the above-mentioned cluster control strategy of configuration in the state of detected a plurality of AVDF servers 204 and the SMF server 206, the normal one or more AVDF servers 204 of selection mode are realized the media flow transmission between any headend equipments 202 and any CE 201.Wherein, cluster control strategy as herein described can be set arbitrarily under this cardinal principle of " having only state normally just to select " according to actual needs, enumerates no longer one by one at this.

For example; For a CE 201 who newly accesses to system through CCF server 203; SMF server 206 can be according to the above-mentioned cluster control strategy of configuration in the state of detected a plurality of AVDF servers 204 and the SMF server 206, and an optional normal AVDF server 204 of state is realized the media flow transmission between this CE 201 and the corresponding arbitrary headend equipment 202.

Again for example; For one through a certain AVDF server 204 realize with corresponding arbitrary headend equipment 202 between the CE 201 of media flow transmission; After these AVDF server 204 states become unusually; SMF server 206 can be according to the above-mentioned cluster control strategy of configuration in the state of detected a plurality of AVDF servers 204 and the SMF server 206; The AVDF server 204 of the normal AVDF server 204 replacement abnormal states of optional another state is realized the media flow transmission between this CE 201 and this headend equipment 202.

In the present embodiment, referring to Fig. 9, SMF server 206 can comprise as medium flow transmitting control device:

The policy configurations module 261 that is used for the bearing cluster control strategy wherein disposes the cluster control strategy that is used for selecting from a plurality of AVDF servers 204 any one or more AVDF servers 204 realization media flow transmission of normal condition;

Be used to detect the state detection module 262 of a plurality of AVDF server 204 states, detect the state of a plurality of AVDF servers 204 among the AVDFPOOL;

Be used to select the policy enforcement module 263 of the AVDF server 204 of normal condition; According to the above-mentioned cluster control strategy of configuration in the state of detected a plurality of AVDF servers 204 and the SMF server 206, the normal one or more AVDF servers 204 of selection mode are realized the media flow transmission between any headend equipments 202 and any CE 201.

Further; For one through a certain AVDF server 204 realize with corresponding arbitrary headend equipment 202 between the CE 201 of media flow transmission; The switching of existing media flow transmission between different AVDF servers 204 possibly appear; So for the continuity of the media stream service after guaranteeing to switch; Can further comprise the business continuing module 264 that links to each other with policy enforcement module 263 in the SMF server 206, be used for also notifying by the modes such as AVDF server 204 after the policy enforcement module 263 selected switchings, realize the forwarding that continues of Media Stream through the point of interruption of recording medium stream before switching AVDF server 204.

Because after these AVDF server 204 states become unusually; SMF server 206 can be according to the above-mentioned cluster control strategy of configuration in the state of detected a plurality of AVDF servers 204 and the SMF server 206; The AVDF server 204 of the normal AVDF server 204 replacement abnormal states of optional another state is realized the media flow transmission between this CE 201 and this headend equipment 202.

Wherein, state detection module 262 can detect the state of a plurality of AVDF servers 204 through the mode of a plurality of AVDF server 204 transmit status query requests in AVDF POOL.

Specifically, further carry the state table of a plurality of AVDF server 204 states among the record AVDF POOL in the state detection module 262 alternatively, the state initial value of a plurality of AVDF servers 204 is normally in this state table.Certainly, among the AVDF POOL state of a plurality of AVDF servers 204 also can adopt other can realization information the existing variety of way of record represent, give unnecessary details no longer one by one at this.

In the practical application, about the state of AVDF server 204, can only consider its running status, so for the running status of AVDF server 204, corresponding operation comprises in the corresponding SMF server 206:

State detection module 262 is a plurality of AVDF servers 204 transmit status query requests in AVDF POOL periodically or in real time; In the predetermined period after the transmit status query requests; If do not receive the correct status poll response of running status of this AVDF server 204 of expression of any AVDF server 204 feedbacks; The running status of then confirming this AVDF server 204 is unusual by normally becoming; Promptly the state of this AVDF server 204 is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; If received the correct status poll response of running status of this AVDF server 204 of expression of any AVDF server 204 feedbacks, confirmed that then the running status of this AVDF server 204 still keeps normally, and state corresponding in the state table is not made an amendment.

In the practical application, about the state of AVDF server 204, can when considering its running status, further consider its load condition, so for the load condition of AVDF server 204, corresponding operation comprises in the corresponding SMF server 206:

State detection module 262 can be further in the load capacity of this AVDF server 204 that from the status poll response that is received from each AVDF server 204, carries; And when the entrained load capacity of status poll response of any AVDF server 204 that obtains is higher than the normal preset first threshold value of expression load; Though the running status of this AVDF server 204 is normal; But still the state of confirming this AVDF server 204 is unusual by normally becoming; Promptly the state of this AVDF server 204 is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; When the entrained load capacity of obtaining of any AVDF server 204 status polls response is higher than the normal predetermined threshold value of expression load; The state of confirming this AVDF server 204 still keeps normal; And because the running status of this AVDF server 204 is also normal, thereby confirm that the running status of this AVDF server 204 still keeps normally, and state corresponding in the state table is not made an amendment;

Perhaps; State detection module 262 can further be higher than the load overload notification that initiatively reports when the expression load is preset second threshold value normally according to any AVDF server 204 in the load capacity of this AVDF server 204; The state of confirming this bearing layer equipment is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; If do not receive the load overload notification that any AVDF server 204 reports; Think that then the load condition of this AVDF server 204 keeps normal; Can confirm according to the running status of this AVDF server 204 whether the state of this AVDF server 204 is unusual by normally becoming according to aforesaid way this moment so.

Wherein, For the above-mentioned entrained load capacity of status poll response by AVDF server 204; If the media flow transmission that AVDF server 204 is realized is accomplished by its inner software that carries, then bearing capacity can be distributed to the resource utilization of software for this AVDF server 204; If AVDF server 204 is the hardware integrated circuit board, then bearing capacity can be internal memory in the hardware integrated circuit board and cpu busy percentage.

In the practical application; State about AVDF server 204; Can also when considering its running status and/or load condition, further consider its Link State, so for the Link State of AVDF server 204, corresponding operation comprises in the corresponding SMF server 206:

The link failure that state detection module 262 can further initiatively report according to AVDF server 204 is notified or is notified through the link failure that CCF server 103 reports by headend equipment 202 or CE 201 under the Media Stream of these AVDF server 204 realization transmission; The state of confirming this AVDF server 204 is unusual by normally becoming; And no matter whether the running status and/or the load condition of this AVDF server 204 be normal; The state of all confirming this AVDF server 204 is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; If do not receive the link failure notice that any AVDF server 204 or headend equipment 202 or CE 201 report; Think that then the Link State of this AVDF server 204 keeps normal; This moment can be according to aforementioned manner so, and whether the state of confirming this AVDF server 204 according to the running status and/or the load condition of this AVDF server 204 is by normally becoming unusually.

Visible by such scheme; Video monitoring system in the present embodiment comprises a plurality of AVDF servers 204; Thereby when AVDF server 204 self breaks down and causes running status unusual; Perhaps when AVDF server 204 causes load condition unusual owing to the headend equipment 202 of a greater number that connects, again or when the Link State between AVDF server 204 and headend equipment 202 or the CE 201 is unusual; Can guarantee that the media flow transmission between headend equipment 202 and the CE 201 can not interrupt by the optional normal AVDF servers 204 of another state of SMF server 206, thereby can improve the reliability of media flow transmission.

Figure 10 is the exemplary process diagram of media flow transmission control method in the embodiment of the invention.Shown in figure 10; Based on video monitoring system as shown in Figure 8; Be a plurality of AVDF servers through IP network link to each other with a SMF server, each headend equipment links to each other through IP network with a plurality of AVDF servers with each CE simultaneously and the SMF server in dispose the cluster control strategy that is used for selecting the AVDF server realization media flow transmission of normal conditions from a plurality of AVDF servers, the media flow transmission control method comprises in the present embodiment:

Step 1001 detects the state of a plurality of AVDF servers.

Before this step, further be provided for writing down the state table of a plurality of AVDF server states among the AVDF POOL alternatively, the state initial value of a plurality of AVDF servers is normally in this state table.Certainly, among the AVDF POOL state of a plurality of AVDF servers also can adopt other can realization information the existing variety of way of record represent, give unnecessary details no longer one by one at this.

In this step, can only consider its running status, for the running status of AVDF server, corresponding concrete operations comprise in this step accordingly so:

A plurality of AVDF server transmit status query requests in AVDF POOL periodically or in real time; In the predetermined period after the transmit status query requests; If do not receive the correct status poll response of running status of this AVDF server of expression of any AVDF server feedback; The running status of then confirming this AVDF server is unusual by normally becoming; Promptly the state of this AVDF server is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; If received the correct status poll response of running status of this AVDF server of expression of any AVDF server feedback, confirmed that then the running status of this AVDF server still keeps normally, and state corresponding in the state table is not made an amendment.

In this step, can when considering the AVDF operation condition of server, further consider its load condition, for the load condition of AVDF server, corresponding concrete operations further comprise in this step accordingly so:

Load capacity at this AVDF server that from the status poll response that is received from each AVDF server, carries; And when the entrained load capacity of status poll response of any AVDF server that obtains is higher than the normal preset first threshold value of expression load; Though the running status of this AVDF server is normal; But still the state of confirming this AVDF server is unusual by normally becoming; Promptly the state of this AVDF server is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; When the entrained load capacity of obtaining of any AVDF server state inquiry response is higher than the normal predetermined threshold value of expression load; The state of confirming this AVDF server still keeps normal; And because the running status of this AVDF server is also normal, thereby confirm that the running status of this AVDF server still keeps normally, and state corresponding in the state table is not made an amendment;

Perhaps; Be higher than the load overload notification that initiatively reports when the expression load is preset second threshold value normally according to any AVDF server in the load capacity of this AVDF server; The state of confirming this bearing layer equipment is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; If do not receive the load overload notification that any AVDF server reports; Think that then the load condition of this AVDF server keeps normal; Can confirm according to the running status of this AVDF server whether the state of this AVDF server is unusual by normally becoming according to aforesaid way this moment so.

In this step, can also when considering its running status and/or load condition, further consider its Link State, for the Link State of AVDF server, corresponding concrete operations further comprise in this step accordingly so:

Link failure according to the AVDF server initiatively reports is notified or is notified through the link failure that the CCF server reports by headend equipment or CE under the Media Stream of this AVDF server realization transmission; The state of confirming this AVDF server is unusual by normally becoming; And no matter whether the running status and/or the load condition of this AVDF server be normal; The state of all confirming this AVDF server is unusual by normally becoming, and changes state corresponding in the state table into expression unusual value; Correspondingly; If do not receive the link failure notice that any AVDF server or headend equipment or CE report; Think that then the Link State of this AVDF server keeps normal; This moment can be according to aforementioned manner so, and whether the state of confirming this AVDF server according to the running status and/or the load condition of this AVDF server is by normally becoming unusually.

Step 1002, according to the state of detected a plurality of AVDF servers and the cluster control strategy of configuration, the normal AVDF server of selection mode is to realize the media flow transmission between headend equipment and the CE.

In this step; For a CE who newly accesses to system through the CCF server; The SMF server can be according to the cluster control strategy that disposes in the state of detected a plurality of AVDF servers and the SMF server; An optional normal AVDF server of state is realized the media flow transmission between this CE and the corresponding arbitrary headend equipment, and media flow transmission at this moment is a new media flow transmission business.

In this step; For one through a certain AVDF server realize with corresponding arbitrary headend equipment between the CE of media flow transmission; After this AVDF server state becomes unusually; The SMF server can be according to the above-mentioned cluster control strategy that disposes in the state of detected a plurality of AVDF servers and the SMF server, and the AVDF server of the normal AVDF server replacement of optional another state abnormal state is realized the media flow transmission between this CE and this headend equipment.That is to say; Relate to the switching of same media flow transmission between different AVDF servers in this case; So for the continuity of the media stream service after guaranteeing to switch; This step can further be flowed in the point of interruption before the switching AVDF server and the any-modes such as AVDF server after the notice switching, the forwarding that continues of realization Media Stream through recording medium by the SMF server.

So far, this flow process finishes.

Visible by above-mentioned flow process; A SMF server in the present embodiment connects a plurality of AVDF servers; Thereby when the AVDF server self breaks down and causes running status unusual; Perhaps when the AVDF server causes load condition unusual owing to the headend equipment of a greater number that connects, again or when the Link State between AVDF server and headend equipment or the CE is unusual; Can guarantee that the media flow transmission between headend equipment and the CE can not interrupt by the optional normal AVDF server of another state of SMF server, thereby can improve the reliability of media flow transmission.

Need to prove, only be to be that example describes with each layer equipment such as AVDF server, SMF servers in the present embodiment.In the practical application, to different video monitoring systems, those skilled in the art can know that certainly the equipment that has an identical function with each layer equipment such as AVDF server, SMF servers replaces, and enumerate no longer one by one at this.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims

1. video monitoring system; It is characterized in that this video monitoring system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and bearing layer equipment, the headend equipment that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

Said access layer equipment accesses to said CE and said headend equipment in the said video monitoring system based on the control of said key-course equipment;

2. video monitoring system as claimed in claim 1 is characterized in that said state comprises running status;

3. video monitoring system as claimed in claim 2 is characterized in that said state further comprises load condition;

4. like claim 2 or 3 described video monitoring systems, it is characterized in that said state further comprises Link State;

5. the medium flow transmitting control device in the video monitoring system; It is characterized in that said video monitoring system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and a plurality of bearing layer equipments, the headend equipment that links to each other through said IP network with the said bearing layer equipment of said access layer equipment and each respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

Said access layer equipment accesses to said CE and said headend equipment in the said video monitoring system based on the control of said key-course equipment; Said bearing layer equipment is realized the media flow transmission between said headend equipment and the said CE based on the control of said key-course equipment;

Medium flow transmitting control device in the said video monitoring system is arranged in the said key-course equipment, and comprises:

6. the medium flow transmitting control device in the video monitoring system as claimed in claim 5 is characterized in that said state comprises running status;

7. the medium flow transmitting control device in the video monitoring system as claimed in claim 6 is characterized in that said state further comprises load condition;

8. like the medium flow transmitting control device in claim 6 or the 7 described video monitoring systems, it is characterized in that said state further comprises Link State;

9. the media flow transmission control method in the video monitoring system; It is characterized in that said video monitoring system comprises: key-course equipment, the access layer equipment that links to each other through IP network with said key-course equipment and a plurality of bearing layer equipments, the headend equipment that links to each other through said IP network with the said bearing layer equipment of said access layer equipment and each respectively and the client unit CE that links to each other through said IP network with said access layer equipment and bearing layer equipment respectively;

And dispose the cluster control strategy that is used for selecting from a plurality of said bearing layer equipments the said bearing layer equipment realization media flow transmission of normal condition in the said key-course equipment, the media flow transmission control method in the said video monitoring system comprises:

10. the media flow transmission control method in the video monitoring system as claimed in claim 9 is characterized in that said state comprises running status;

11. the media flow transmission control method in the video monitoring system as claimed in claim 10 is characterized in that said state further comprises load condition;

12. the media flow transmission control method as in claim 10 or the 11 described video monitoring systems is characterized in that said state further comprises Link State;