CN105827650A - Media stream forwarding method and device - Google Patents
Media stream forwarding method and device Download PDFInfo
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- CN105827650A CN105827650A CN201610345964.9A CN201610345964A CN105827650A CN 105827650 A CN105827650 A CN 105827650A CN 201610345964 A CN201610345964 A CN 201610345964A CN 105827650 A CN105827650 A CN 105827650A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/765—Media network packet handling intermediate
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Abstract
The application discloses a media stream forwarding method and device. The method comprises the following steps: determining a slave access box for forwarding media streams and sending a virtual channel establishing request to an equipment agent when a master access box judges that an access capability of the master access box cannot meet a bandwidth demand of a monitoring service request; and sending a media stream establishing message which takes a virtual IP (Internet Protocol) address as a source address to the slave access box after instructing the slave access box and the equipment agent to establish a virtual tunnel which corresponds to a network segment virtual address pool and acquire a virtual address which corresponds to the virtual tunnel. Through adoption of the media stream forwarding method and device, media streams of mass social monitoring resources can be forwarded normally under the situation of lowering the networking structure adjustment complexity.
Description
Technical field
The application relates to communication technical field, particularly to a kind of forwarding media stream method.The application also relates to a kind of forwarding media stream device.
Background technology
In recent years, along with computer, network and image procossing, the developing rapidly of transmission technology, Video Supervision Technique there has also been significant progress.Constantly advance along with what the whole province's video monitoring system was built and go deep into, the construction scale of video monitoring photographic head and coverage expanding day, wherein, total monitoring camera quantity 92.5% is accounted for by society's unit (Party and government offices, enterprises and institutions, sociogroup and other social organizatioies and individual citizens) video monitoring photographic head of investment construction voluntarily, while greatly having ensured unit safe, effectively compensate for common monitoring point inadequate resource, the monitoring problems such as blind spot is more.But, although society unit build video monitoring system quantity many, but form dissipate, not architectonical, do not network, separate, there is the problems such as video monitoring resource-sharing difficulty, repeated construction to a certain extent.
As it is shown in figure 1, be that in prior art, society's monitoring resource accesses schematic diagram, in order to play the effectiveness of video monitoring system to greatest extent, whole society's monitoring resource-sharing shares and becomes the target currently urgently realized.In the networking structure schematic diagram of the existing video monitoring system shown in Fig. 2, social resources access box and general headquarters that main use is special set up monitoring tunnel, are realized the access of social resources by tunnel.Proxy for equipment therein accesses for third party device, the generally equipment such as equipment access server or SIP (SessionInitiationProtocol, session initiation protocol) gateway.In current networking structure, one resource accesses program request and the forwarding that box needs the overall society being responsible for a region to monitor resource, therefore, in the case of society's monitoring resource of magnanimity, the resource of limited capacity accesses box cannot support fairly large access capability, and if again existing society monitoring resource being carried out structural adjustment and divides, also will expend substantial amounts of manpower and materials.
As can be seen here, how on the premise of not structure to existing video monitoring system carries out complexity adjustment, it is ensured that the Media Stream of society's monitoring resource of magnanimity can normally be forwarded, and becomes the technical problem that those skilled in the art are urgently to be resolved hurrily.
Summary of the invention
The application provides a kind of forwarding media stream method, in order to the problem solving cannot simply and reliably carry out forwarding by the Media Stream of society's monitoring resource of magnanimity in prior art.The method is applied to include in the video monitoring system that proxy for equipment, society monitor resource and multiple access box, and comprises a main access box in multiple access box, and the method includes:
When described main access box receives the monitoring business request coming from described proxy for equipment, described main access box judges whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked,
If the access capability of described main access box self cannot meet described bandwidth demand, described main access case daughter root according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual network Protocol IP address corresponding with described network segment virtual address pond；
Described main access box notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel；
Described main access box sets up message to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
Preferably, receive the monitoring business request coming from described proxy for equipment at described main access box before, also include:
Described main access box is after described proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between described proxy for equipment, and it is obtained from the virtual address in described virtual channel according to described initial network segment virtual address pond, the virtual address of main access box maps to the physical address of described society monitoring resource, and resource is corresponding is configured in described proxy for equipment with described society monitoring.
Preferably, also include:
Described main access box receives other and accesses the competence set information that box reports when registration, and described described from accessing competence set more fresh information and the forwarding-table item that box reports from accessing reception after the described Media Stream received is sent by box by described virtual channel to described proxy for equipment；
When described main access case daughter root determines described from accessing way that box tunnel forwards for time empty according to described from accessing the competence set more fresh information that reports of box, described main access box is described to arrange intervalometer from accessing box；Described intervalometer for indicate described main access box timing expire and described from access box do not receive remove when Media Stream sets up message described from the virtual channel accessed between box and described proxy for equipment；
Wherein, described access capability be described access box media business ability and built vertical Media Stream shared by the difference of bandwidth；Described main access box has the forwarding-table item of the corresponding relation of real ip address and the described initial virtual IP address comprising described main access box；Described from accessing the forwarding-table item box with the corresponding relation comprising the described real ip address from access box and described virtual ip address.
Preferably, after described main access box receives the competence set information reported when other access box in registration, also include:
Described main access box accesses at described other and selects in box and specify standby access box；
Described main access box synchronizes all virtual ip address of described proxy for equipment, each competence set accessing box and forwarding-table item according to the default cycle to described standby access box.
Preferably, also include:
When described main access box receives the Media Stream cancellation message that described proxy for equipment is sent by described initial virtual IP address, described main access box determines cancels Media Stream to be cancelled corresponding to message with described Media Stream, and according to the forwarding-table item of described main access box determine described in Media Stream to be cancelled whether by the forwarding of described main access box；
If Media Stream to be cancelled described in is forwarded by described main access box, and described main access case daughter root sends described Media Stream according to the forwarding-table item of described main access box to society's monitoring resource that described Media Stream to be cancelled is corresponding and cancels message；
If Media Stream to be cancelled described in is forwarded from access box by described, described main access box forwards described Media Stream cancellation message to described from access box, sends described Media Stream cancellation message from the forwarding-table item accessing box to the social resource that monitors that described Media Stream to be cancelled is corresponding according to described from access case daughter root so that described.
Correspondingly, the application also proposed a kind of forwarding media stream device, and this device is applied to include in the video monitoring system that proxy for equipment, society monitor resource and multiple access box, including with lower module as main access box:
Judge module, when receiving the monitoring business request coming from described proxy for equipment, it is judged that whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked,
Processing module, when the access capability that described judge module determines described equipment cannot meet described bandwidth demand, according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual network Protocol IP address corresponding with described network segment virtual address pond；
Notification module, notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel；
Sending module, message is set up to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
Preferably, also include:
Initialization module, after described proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between described proxy for equipment, and it is obtained from the virtual address in described virtual channel according to described initial network segment virtual address pond, the virtual address of main access box maps to the physical address of described society monitoring resource, and resource is corresponding is configured in described proxy for equipment with described society monitoring.
Preferably, also include:
Receiver module, receive other and access the competence set information that box reports when registration, and described described from accessing competence set more fresh information and the forwarding-table item that box reports from accessing reception after the described Media Stream received is sent by box by described virtual channel to described proxy for equipment；
Remove module, determining described from accessing way that box tunnel forwards for being described to arrange intervalometer from accessing box time empty according to described from accessing the competence set more fresh information that reports of box；Described intervalometer for indicate described main access box timing expire and described from access box do not receive remove when Media Stream sets up message described from the virtual channel accessed between box and described proxy for equipment；
Wherein, described access capability be described access box media business ability and built vertical Media Stream shared by the difference of bandwidth；Described main access box has the forwarding-table item of the corresponding relation of real ip address and the described initial virtual IP address comprising described main access box；Described from accessing the forwarding-table item box with the corresponding relation comprising the described real ip address from access box and described virtual ip address.
Preferably, also include:
Select module, access at described other and box selects and specifies standby access box；
Synchronization module, synchronizes all virtual ip address of described proxy for equipment, each competence set accessing box and forwarding-table item according to the default cycle to described standby access box.
Preferably, also include:
Cancel module, when receiving described proxy for equipment and cancelling message by the Media Stream that described initial virtual IP address sends, determine and cancel Media Stream to be cancelled corresponding to message with described Media Stream, and according to the forwarding-table item of described main access box determine described in Media Stream to be cancelled whether by the forwarding of described main access box；
If Media Stream to be cancelled described in is forwarded by described main access box, and described cancellation module sends described Media Stream according to the forwarding-table item of described main access box to society's monitoring resource that described Media Stream to be cancelled is corresponding and cancels message；
If Media Stream to be cancelled described in is forwarded from access box by described, described cancellation module forwards described Media Stream cancellation message to described from access box, sends described Media Stream cancellation message from the forwarding-table item accessing box to the social resource that monitors that described Media Stream to be cancelled is corresponding according to described from access case daughter root so that described.
As can be seen here, by applying the technical scheme of the application, when main access box judges the bandwidth demand that the access capability of self cannot meet monitoring business request, determine for forwarding media stream from access box and to proxy for equipment send tunnel set up request, and in notice after accessing the box virtual channel corresponding with network segment virtual address pond with proxy for equipment foundation and obtaining the virtual address corresponding with virtual channel, set up message to the Media Stream sent with virtual ip address as source address from access box.Thus in the case of reducing networking structure adjustment complexity, it is possible to ensure normally to forward the Media Stream of society's monitoring resource of magnanimity.
Accompanying drawing explanation
Fig. 1 is that in prior art, society's monitoring resource accesses schematic diagram；
Fig. 2 is the networking structure schematic diagram of existing video monitoring system；
Fig. 3 is the schematic flow sheet of a kind of forwarding media stream method that the application proposes；
Fig. 4 is the networking structure schematic diagram of a kind of video monitoring system that the application specific embodiment proposes；
Fig. 5 is to carry out the schematic diagram that stacking forwards in the application specific embodiment；
Fig. 6 is the structural representation of a kind of forwarding media stream device that the application proposes.
Detailed description of the invention
Because the problem in background technology, present applicant proposes a kind of forwarding media stream method, the method is by being stacked multiple existing access boxes, the physical medium flow point making society's monitoring resource spreads out on different access boxes, the most multiple access case subclass are to proxy for equipment perception only one of which box seemingly, thus on the premise of existing video monitoring system networking significantly not being changed, it is ensured that the continuity of forwarding media stream and reliability.
As it is shown on figure 3, the schematic flow sheet of a kind of forwarding media stream method proposed for the application, the method is applied to include in the video monitoring system that proxy for equipment, society monitor resource and multiple access box.And the society's monitoring resource in this video monitoring system can contain device type miscellaneous; such as NVR (NetworkVideoRecorder; network hard disk video recorder) DVR (DigitalVideoRecorder; DVR) etc., the difference of society's monitoring resource type has no effect on the protection domain of the application.
It should be noted that at this, due to proxy for equipment to society monitoring resource service request signaling all be send main access box, selected suitably to access box from the ability scheduling accessing box with each according to the bandwidth in tunnel by main access case daughter root, therefore before application this method, need to determine that this society monitoring resource at least needs how many access boxes according to the performance required for the currently used specification accessing box and user in social resources environment, and the access box that disclosure satisfy that the quantity of this demand is linked in user network.Therefore the summation of the competence set of the multiple access boxes in this video monitoring system should be greater than the bandwidth demand of society's monitoring resource, and comprises a main access box.
Specifically, the method comprises the following steps:
S301, when described main access box receives the monitoring business request coming from described proxy for equipment, described main access box judges whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked, described competence set include media business ability and the access capability of described access box.
In order to multiple access box can also be able to adaptation with existing proxy for equipment and society's monitoring resource under normal circumstances and work, in the technical scheme of the application, the access box and the proxy for equipment that need forwarding media stream are set up virtual tunnel respectively and are connected, and obtain virtual address that proxy for equipment is its distribution.The virtual address of the most main access box is mapped to society's monitoring resource, and proxy for equipment initiates the virtual address that destination address is main access box of the signaling of program request to society's monitoring resource.Correspondingly, signaling, after the actual address that the destination address of signaling is converted to society's monitoring resource, is forwarded to society's monitoring resource by main access box, and proxy for equipment is different corresponding to the different virtual ip address accessing box.
In the preferred embodiment of the application, it is accomplished by proxy for equipment and accesses the initial configuration of box:
First, proxy for equipment creates and issues original net section virtual address pond, is self to arrange initial virtual IP (InternetProtocol, procotol) address according to initial network segment virtual address pond subsequently.
Secondly, main access box is after proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between proxy for equipment, and be obtained from the virtual address in described virtual channel according to initial network segment virtual address pond.It is the virtual IP address of each equipment configuration in video monitoring system owing to the application applies network segment virtual address pond, therefore as the forwarding media stream device between proxy for equipment and society's monitoring resource, the virtual address that IP address is main access box of the society's monitoring resource configured on proxy for equipment, proxy for equipment is sent to the message of society's monitoring resource and is all sent to main access box, thus proxy for equipment can be without also monitoring resource request Media Stream to society in the case of knowing the social real IP address monitoring resource.To this end, the virtual address of access box main in this step is mapped to the physical address of corresponding society monitoring resource by the technical scheme of the application, and resource is corresponding is configured in proxy for equipment with society monitoring.
nullAnd for the society's monitoring resource in technical scheme，It is directly by virtual ip address corresponding for media stream to proxy for equipment，But actually Media Stream is all to need to be forwarded by the carrying out of access box，Access box and the network segment corresponding to different Media Streams are the most different，Therefore after proxy for equipment and main access box are ready all in accordance with network segment virtual address pond，Main access box will send route to society's monitoring resource and add message，This route adds the real ip address corresponding relation carrying initial virtual IP address and main access box in message，So society's monitoring resource is resolving the initial route that can add the real ip address corresponding relation including initial virtual IP address with main access box after route adds message，The media stream real ip address to main access box of proxy for equipment corresponding to initial virtual IP address will be sent to，Achieve the forwarding media stream accessing box.
For the ease of being managed the forwarding media stream information between proxy for equipment and society's monitoring resource, each access box in the application preferred embodiment, after setting up virtual channel with proxy for equipment, all can arrange corresponding forwarding-table item.As main access box, after sending route interpolation message to society's monitoring resource, the forwarding-table item of the corresponding relation of real ip address and the initial virtual IP address comprising main access box self also can be generated.
Additionally, for the forwarding media stream device in video monitoring system, whether it can be in accordance with what its access capability determined by forwarding media stream, in the preferred embodiment of the application, using bandwidth as the criterion of access capability, the bandwidth in the tunnel that access capability is this access box of the most each access box and the difference of the current code stream accessed.Under other scene, technical staff can also determine the access capability of its correspondence according to the otherwise performance parameter of equipment, and these broadly fall into the protection domain of the application.
It should be noted that, main owing to having 1 between the multiple access boxes in the application, 1 hot standby, how from administrative mechanism, therefore after having elected main access box from multiple access boxes, other can report its respective competence set information when registering to main access box to main access box from accessing box；And main access box is in addition to receiving other and accessing competence set information that boxes registration reports and statistic record other access the competence set of boxes, also from access box, the Media Stream received will be received from accessing competence set more fresh information and the forwarding-table item that box reports by virtual channel after proxy for equipment transmission follow-up, be connected so that main access box suitably can set up tunnel from access box with proxy for equipment according to each from the access capability selection accessing box.
Further, main access box is being set up after tunnel is connected with proxy for equipment, in addition it is also necessary to the moment keeps with each from the synchronizing information accessing box.Therefore to avoid main access box to break down brought inconvenience, after the preferred embodiment of the application makes the competence set information that main access box reports when receiving other and accessing box in registration in advance, to select in other access box and specify standby access box, all virtual ip address, each competence set accessing box and the forwarding-table item acted on behalf of to standby access box synchronizer according still further to the default cycle.The most main access box and standby access box are in periodically keepalive state, transmit mutually the respective network information.When judging that main access box powered-off fault or network are obstructed when standby access box, standby access box will initiate adapter notice to other boxes, automatically become new main access box.
Further, when one in time accessing box no longer forwarding media stream, it is connected with the tunnel of proxy for equipment also will take certain device resource, therefore to avoid the waste of resource, when according to the competence set more fresh information reported from access box, main access case daughter root determines that this way forwarded from access box tunnel is for time empty, main access box is for arranging intervalometer from access box, if still not receiving if Media Stream sets up message when intervalometer timing expires from accessing box, main access box will be removed from the virtual channel accessed between box and described proxy for equipment, thus realize the release of resource.
S302, if the access capability of described main access box self cannot meet described bandwidth demand, described main access case daughter root according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual ip address corresponding with described network segment virtual address pond.
After being judged by S301, when the code stream that the agency's continuation program request of main access box discovering device is new exceeds the access capability of oneself, main access box needs to specify and carrys out, from access box, the Media Stream that forwarding unit acts on behalf of the access capability part beyond main access box of program request, and in subsequent steps the source IP of new program request signaling is revised as the virtual ip address from the corresponding proxy for equipment accessing box selected, so purpose IP of the Media Stream that society's monitoring resource sends is exactly the virtual ip address of proxy for equipment, accordingly, follow-up from access box receive this Media Stream time, can be the forwarding media stream received to proxy for equipment from accessing box, the source IP of the Media Stream being transmitted to proxy for equipment is revised as the virtual address of main access box.The most either society monitoring resource receive access box send Media Stream set up message, or when proxy for equipment receives the Media Stream accessing box forwarding, will be considered to be directly transmitted by main access box, thus on the premise of the most perceived, achieve multiple access box stacking forwarding capability.
S303, described main access box notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel.
Owing to Media Stream is indeed through from accessing what box carried out forwarding, therefore proxy for equipment needs to arrange new network segment virtual address pond for this from accessing box, the most main access box could notify set up virtual channel from access case subbase in this new network segment virtual address pond and obtain corresponding virtual address, the most main access box, from access box and society monitoring resource all can carry out corresponding IP address and the setting of route.As from accessing box, after obtaining the virtual address corresponding with virtual channel, self generation is comprised the forwarding-table item of the real ip address from access box and the corresponding relation of virtual ip address.
After main access box instruction proxy for equipment should issue new network segment virtual address pond, for society's monitoring resource, it is the equal of to be configured with a new virtual proxy for equipment, send to this new virtual proxy for equipment Media Stream all by from access box forward, therefore to enable from accessing box and society's monitoring resource adaptation, society's monitoring resource in video monitoring system is sent route and adds message by main access box after this step, corresponding society monitoring resource is after receiving route interpolation message, the route that message interpolation is new can be added by resolving route, this new route includes virtual ip address and the corresponding relation from the real ip address accessing box.
In addition; owing to main access box knows in current video monitoring system other from the access capability accessing box; therefore the Media Stream that can forward as required, each access capability from access box and practical situation select suitably from accessing box; should be to be necessarily required to meet the forwarding bandwidth of Media Stream require from the access capability accessing box; the concrete mode technical staff from accessing box that selects can be configured in conjunction with practical situation, and these broadly fall into the protection domain of the application.
S304, described main access box sets up message to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
By setting up message to from access box transmission Media Stream, main access box can indicate from accessing box to society's monitoring resource request Media Stream that monitoring business request is specified when the Media Stream bandwidth of program request is beyond the access capability of oneself, and sent to proxy for equipment by virtual channel by received Media Stream, thus realize the forwarding of Media Stream.It should be noted that at this, if from access box with the form of data message to proxy for equipment forward from Media Stream received by society's monitoring resource time, the source IP address of this data message is the virtual address in main access box virtual channel between this main access box and proxy for equipment, so proxy for equipment i.e. thinks that this Media Stream still comes from main access box, thus achieves the forwarding of Media Stream on the premise of not affecting proxy for equipment perception.On this basis, the scheme taking other technologies means to realize not carrying out proxy for equipment additional configuration and energy forwarding media stream belongs to the protection domain of the application.
Owing to the society's monitoring resource in video monitoring system all obtains depending on demand, when technical staff is no longer necessary to the Media Stream of certain society's monitoring resource, main access box can receive when being cancelled message by proxy for equipment by the Media Stream that initial virtual IP address sends, first main access box determines cancels, with Media Stream, the Media Stream to be cancelled that message is corresponding, and determine whether Media Stream to be cancelled is forwarded by described main access box according to the forwarding-table item of main access box, it is respectively processed according to situations below subsequently:
(1) Media Stream to be cancelled is forwarded by described main access box
In this case, main access box sends Media Stream cancellation message according only to the forwarding-table item of main access box to society's monitoring resource that Media Stream to be cancelled is corresponding.In the application specific embodiment, if live media stream to be cancelled is forwarded by main access box, the real ip address that main access box monitors resource by the real ip address of self to the society that live media stream to be cancelled is corresponding sends Media Stream cancellation message.
(2) Media Stream to be cancelled is by from accessing box forwarding
In this case, main access box needs to cancel message to from access box forwarding media stream, so could send Media Stream cancellation message according to monitoring resource from the forwarding-table item accessing box to the society that Media Stream to be cancelled is corresponding from access box.In the specific embodiment of the application, after receiving, from access box, the Media Stream cancellation message that main access box sends, inquire about self central forwarding-table item, and the real ip address monitoring resource to the society that live media stream to be cancelled is corresponding by the real ip address of self sends Media Stream cancellation message.
In order to the technological thought of the application is expanded on further, in conjunction with concrete application scenarios, the technical scheme of the application is illustrated.In this specific embodiment, it is as follows that proxy for equipment and social resources access the module included by box:
(1) proxy for equipment
1, VPN (VirtualPrivateNetwork, VPN (virtual private network)) tunnel Server (server)
Module: be used for and social resources access and set up vpn tunneling between box；
2, society's monitoring resource AM access module: be responsible for social resources and access the related service of box；
3, DHCP (DynamicHostConfigurationProtocol, DHCP) Server
Module: as DHCPServer be society monitoring resource access box distribution IP address, mask, gateway；
4, address pool module: the multiple tunnel address distribution being responsible on proxy for equipment and recovery.
(2) (society's monitoring resource) accesses box
1.VPN tunnel Client module: be used for setting up vpn tunneling between proxy for equipment；
2.DHCPClient module: obtain IP address, mask, gateway from proxy for equipment as DHCPClient；
3. packet sending and receiving control module: be responsible for normal routing forwarding and the message translation function of message.
The proxy for equipment that forms based on above-mentioned module and access box, the scheme of this specific embodiment is divided into below scheme:
(1) network configuration initializes:
Before performing the scheme of this specific embodiment, the performance needed according to the performance and user that access box in social resources environment is needed to calculate, obtaining this society monitoring resource needs how many access box and be linked in user network, the following address of the execution subsequently distribution during being somebody's turn to do and route learning process:
(1) first network segment virtual address pond: 1.1.1.0/24 of proxy for equipment address pool module creation, and the virtual ip address arranging self is, 1.1.1.1.Start DHCPServer module simultaneously, network segment 1.1.1.0/24 is externally issued.
(2) access box 1 by vpn tunneling Client module to proxy for equipment server vpn tunneling Server module, carry out VPN dialing, set up tunnel and be linked in society's monitoring resource network, and enable DHCPclient, obtain IP address from proxy for equipment.Accessing box 1 as shown in Figure 4 to set up tunnel with proxy for equipment and be connected, the address obtained is 1.1.1.2/32, and arrange its gateway is 1.1.1.1 simultaneously.
(3) accessing box 1 and this virtual address can be mapped to the physical interface address of NVR, such proxy for equipment can access NVR by accessing the virtual address accessing box.
(4), when adding social resources NVR on proxy for equipment, 1 IP address is configured, for 1.1.1.2.Proxy for equipment is controlled the mutual of signaling message with this IP with accessing box (as to NVR).
(5) access box 1 and send message to NVR, inform that NVR needs to arrange the route of down hop.In society's monitoring resource NVR (real ip address, such as 192.168.100.254)) after analytic message, add the route of proxy for equipment to, as follows:
Destination address mask down hop
1.1.1.1255.255.255.255 the real ip address (such as 192.168.100.2) of box 1 is accessed
The network configuration of video monitoring system in this specific embodiment is achieved, under the normal condition business code flow of NVR (capacity of equipment of the most main access box can access at present), it is possible to achieve the normal forwarding of Media Stream by said process.
(2) from accessing box capability reporting:
Assuming that NVR accesses the IPC of 8 road 2Mbps, the maximum effective bandwidth in the tunnel of the foundation of proxy for equipment and each access box is 8Mbps, and the most actually accessing box 1 from one is cannot all to access the IPC business code flow of 8 road 2Mbps NVR.Therefore to enable other stackings normally realizing Media Stream in the case of main access box scarce capacity from access box to forward, this specific embodiment is reported the access capability of self by other from access box to main access box.
As it is shown in figure 5, for carrying out the schematic diagram that stacking forwards in the application specific embodiment, it is Master that configuration accesses box 1, accessing box 2 other boxes such as grade is Slave, accesses the box 1 overall scheduling as box, is responsible for other access box.As other boxes of Slave to Master box, register and report the transfer capability of its current access, the message that Master box obtains, it is exemplified below:
(3) main access box forwarding media stream:
In the networking structure shown in Fig. 4, when proxy for equipment needs the Media Stream obtaining society's monitoring resource, use 1.1.1.1 to realize Master box as oneself receipts stream address i.e. to access box 1 and communicate, the forwarding-table item generated on Master box, the such as fact of 4 passages, corresponding forwarding-table item is as follows:
(4) main access box transfer capability deficiency configures
When proxy for equipment asks monitoring business (the live or playback) of the passage under social resources every time, request message will be sent to Master box.When proxy for equipment continues to Master box, during request channel 5 live, first Master box detects down the ability of self, finds the most 4 road 2Mbps code streams, and the ability of being currently accessed reaches the bandwidth limit of ability 8Mbps of current tunnel；Forward so Master box can not be re-used.Then, obtaining the competence set of other boxes and be currently accessed ability, the media business ability such as getting Slave box is 8Mbps, and the ability of being currently accessed is 8Mbps.
Master initiates request to proxy for equipment, and the transfer capability that annunciator acts on behalf of current virtual passage is not enough, and request resettles a new tunnel.
When proxy for equipment receives this request, by address pool module, creating second network segment virtual address pond, 2.1.1.0/24, and the virtual ip address arranging self is, 2.1.1.1.Start DHCPServer module simultaneously, network segment 2.1.1.0/24 is externally issued.Proxy for equipment is informed the server info in newly-established tunnel and is informed that access box 2 is set up tunnel with proxy for equipment and is connected to Master, Master simultaneously, and the address obtained is 2.1.1.2.
Accessing box 1 and send message to NVR, inform that NVR needs to increase, the route arranging down hop increases 2.1.1.1.In society's monitoring resource NVR (real ip address, such as 192.168.100.254)) after analytic message, add the route of proxy for equipment to, specific as follows shown in:
Destination address mask down hop
1.1.1.1255.255.255.255 the real ip address (such as 192.168.100.2) of box 1 is accessed
2.1.1.1255.255.255.255 the real ip address (such as 192.168.100.3) of box 2 is accessed
Master, by the IP of actual 192.168.100.2, sends notice message to Box2, it is desirable to Box2 actively sets up the fact of the passage 5 of NVR1.Now, it is all 1.1.1.1 that the signaling of proxy for equipment to Master controls the source IP of message, if but actual Box2 cannot set up tunnel by this IP with proxy for equipment and be connected, and the bandwidth of this tunnel reality is the fullest.For proxy for equipment, Master requires that Box2 actively sets up the live signaling message of the passage 5 of NVR1, modify, and revising its source IP by 1.1.1.1 is 2.1.1.1, and i.e. allowing it become is to be that the virtual IP address in second tunnel of proxy for equipment sends seemingly.Now the corresponding forwarding-table item of Box1 (Master) is as follows:
(5) from accessing box forwarding media stream
After Box2 receives this message of Master, by the IP of actual 192.168.100.3, ask fact to NVR1 passage 5.Meanwhile, Box2 (Slave) reports Box1 (Master) message, updates its current competence set.On Master box, competence set now is as follows:
Box2 passes through the virtual channel 2.1.1.0/24 network segment, when proxy for equipment sends media stream service message, self is sent the source IP address of message, it is modified as the virtual IP address that the main tunnel of the i.e. Article 1 of 1.1.1.2, IP address of Master box is corresponding by 2.1.1.2, when so proxy for equipment receives this Business Stream message, it is believed that and sends from Master box stream, be that the IP address of data stream with other passages before is consistent legal.Now Box2 correspondence forwarding-table item is as follows:
The like, Master box can access multiple Slave box, carries out stacking management, it is achieved the forwarding of tunnel traffic.
(6) election of box is accessed
Election mechanism under the stacking management extremely of multiple boxes, mainly starts to be configured one Master box of appointment by user, and other box is Slave box.
Master box can select, from the Slave box of registration, the box that a resource is the most idle, as the spare cassette BM of Master, by forwarding-table item and the competence set of the Master all boxes of box periodic synchronous, and the IP of proxy for equipment.BM box and Master box, be in periodically keepalive state, is responsible for transmitting mutually the respective network information.When Master box powered-off fault or network are obstructed, BM box initiates adapter notice as Master box to other boxes, becomes new Master box.
(7) live business is cancelled
When proxy for equipment needs to cancel live business, proxy for equipment first passes through the empty IP2.1.1.1 in first tunnel, sends the passage needing to set up live NVR to Master box.
After Master box receives the message of service request, need the forwarding-table item that inquiry is local, if passage is 1,2,3,4 passages, be then that Master box is from forwarding with it.Master box to IP192.168.100.254 actual for social resources NVR by actual IP192.168.100.2, is sent and cancels live signaling
If passage is 5 passages, Master box is then to other Slave boxes such as box 2, sendaisle information, after self forwarding-table item inquired about by box 2, in like manner actual IP192.168.100.3, to IP192.168.100.254 actual for social resources NVR, sends and cancels live signaling, cancel fact.Update local forwarding-table item simultaneously, report Master box to update its transfer capability set.
After Master box obtains the information of other Slave boxes, check and judge the way that other box tunnels forward, if it is empty for forwarding way, certain digestion period is then set, e.g. 30 minutes, if in spending 30 minutes, new live service request is not had to need certain Slave box to carry out, then notice proxy for equipment removes this tunnel, discharges resource, alleviates load.
For reaching above technical purpose, the application also proposed a kind of forwarding media stream device, this device is applied to include in the video monitoring system that proxy for equipment, society monitor resource and multiple access box, as shown in Figure 6, including such as lower module as main access box:
Judge module 610, when receiving the monitoring business request coming from described proxy for equipment, it is judged that whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked,
Processing module 620, when the access capability that described judge module determines described equipment cannot meet described bandwidth demand, according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual network Protocol IP address corresponding with described network segment virtual address pond；
Notification module 630, notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel；
Sending module 640, message is set up to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
In concrete application scenarios, also include:
Initialization module, after described proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between described proxy for equipment, and it is obtained from the virtual address in described virtual channel according to described initial network segment virtual address pond, the virtual address of main access box maps to the physical address of described society monitoring resource, and resource is corresponding is configured in described proxy for equipment with described society monitoring.
In concrete application scenarios, also include:
Receiver module, receive other and access the competence set information that box reports when registration, and described described from accessing competence set more fresh information and the forwarding-table item that box reports from accessing reception after the described Media Stream received is sent by box by described virtual channel to described proxy for equipment；
Remove module, determining described from accessing way that box tunnel forwards for being described to arrange intervalometer from accessing box time empty according to described from accessing the competence set more fresh information that reports of box；Described intervalometer for indicate described main access box timing expire and described from access box do not receive remove when Media Stream sets up message described from the virtual channel accessed between box and described proxy for equipment；
Wherein, described access capability be described access box media business ability and built vertical Media Stream shared by the difference of bandwidth；Described main access box has the forwarding-table item of the corresponding relation of real ip address and the described initial virtual IP address comprising described main access box；Described from accessing the forwarding-table item box with the corresponding relation comprising the described real ip address from access box and described virtual ip address.
In concrete application scenarios, also include:
Select module, access at described other and box selects and specifies standby access box；
Synchronization module, synchronizes all virtual ip address of described proxy for equipment, each competence set accessing box and forwarding-table item according to the default cycle to described standby access box.
In concrete application scenarios, also include:
Cancel module, when receiving described proxy for equipment and cancelling message by the Media Stream that described initial virtual IP address sends, determine and cancel Media Stream to be cancelled corresponding to message with described Media Stream, and according to the forwarding-table item of described main access box determine described in Media Stream to be cancelled whether by the forwarding of described main access box；
If Media Stream to be cancelled described in is forwarded by described main access box, and described cancellation module sends described Media Stream according to the forwarding-table item of described main access box to society's monitoring resource that described Media Stream to be cancelled is corresponding and cancels message；
If Media Stream to be cancelled described in is forwarded from access box by described, described cancellation module forwards described Media Stream cancellation message to described from access box, sends described Media Stream cancellation message from the forwarding-table item accessing box to the social resource that monitors that described Media Stream to be cancelled is corresponding according to described from access case daughter root so that described.
By applying the technical scheme of the application, when main access box judges the bandwidth demand that the access capability of self cannot meet monitoring business request, determine for forwarding media stream from access box and to proxy for equipment send tunnel set up request, and in notice after accessing the box virtual channel corresponding with network segment virtual address pond with proxy for equipment foundation and obtaining the virtual address corresponding with virtual channel, set up message to the Media Stream sent with virtual ip address as source address from access box.Thus in the case of reducing networking structure adjustment complexity, it is possible to ensure normally to forward the Media Stream of society's monitoring resource of magnanimity.
Through the above description of the embodiments, those skilled in the art is it can be understood that can realize by hardware to the application, it is also possible to the mode adding necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the application can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) performs the application, each implements the method described in scene.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram being preferable to carry out scene, module or flow process in accompanying drawing are not necessarily implemented necessary to the application.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can carry out being distributed in the device implementing scene according to implementing scene description, it is also possible to carry out respective change and be disposed other than in one or more devices of this enforcement scene.The module of above-mentioned enforcement scene can merge into a module, it is also possible to is further split into multiple submodule.
Above-mentioned the application sequence number, just to describing, does not represent the quality implementing scene.
The several scenes that are embodied as being only the application disclosed above, but, the application is not limited to this, and the changes that any person skilled in the art can think of all should fall into the protection domain of the application.
Claims (10)
1. a forwarding media stream method, it is characterised in that described method is applied to include, in the video monitoring system that proxy for equipment, society monitor resource and multiple access box, comprising a main access box in the plurality of access box, and the method includes:
When described main access box receives the monitoring business request coming from described proxy for equipment, described main access box judges whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked；
If the access capability of described main access box self cannot meet described bandwidth demand, described main access case daughter root according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual network Protocol IP address corresponding with described network segment virtual address pond；
Described main access box notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel；
Described main access box sets up message to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
2. the method for claim 1, it is characterised in that receive the monitoring business request coming from described proxy for equipment at described main access box before, also include:
Described main access box is after described proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between described proxy for equipment, and it is obtained from the virtual address in described virtual channel according to described initial network segment virtual address pond, the virtual address of main access box maps to the physical address of described society monitoring resource, and resource is corresponding is configured in described proxy for equipment with described society monitoring.
3. method as claimed in claim 2, it is characterised in that also include:
Described main access box receives other and accesses the competence set information that box reports when registration, and described described from accessing competence set more fresh information and the forwarding-table item that box reports from accessing reception after the described Media Stream received is sent by box by described virtual channel to described proxy for equipment；
When described main access case daughter root determines described from accessing way that box tunnel forwards for time empty according to described from accessing the competence set more fresh information that reports of box, described main access box is described to arrange intervalometer from accessing box；Described intervalometer for indicate described main access box timing expire and described from access box do not receive remove when Media Stream sets up message described from the virtual channel accessed between box and described proxy for equipment；
Wherein, described access capability be described access box media business ability and built vertical Media Stream shared by the difference of bandwidth；Described main access box has the forwarding-table item of the corresponding relation of real ip address and the described initial virtual IP address comprising described main access box；Described from accessing the forwarding-table item box with the corresponding relation comprising the described real ip address from access box and described virtual ip address.
4. method as claimed in claim 3, it is characterised in that after described main access box receives the competence set information reported when other access box in registration, also include:
Described main access box accesses at described other and selects in box and specify standby access box；
Described main access box synchronizes all virtual ip address of described proxy for equipment, each competence set accessing box and forwarding-table item according to the default cycle to described standby access box.
5. the method as described in any one of claim 2-4, it is characterised in that also include:
When described main access box receives the Media Stream cancellation message that described proxy for equipment is sent by described initial virtual IP address, described main access box determines cancels Media Stream to be cancelled corresponding to message with described Media Stream, and according to the forwarding-table item of described main access box determine described in Media Stream to be cancelled whether by the forwarding of described main access box；
If Media Stream to be cancelled described in is forwarded by described main access box, and described main access case daughter root sends described Media Stream according to the forwarding-table item of described main access box to society's monitoring resource that described Media Stream to be cancelled is corresponding and cancels message；
If Media Stream to be cancelled described in is forwarded from access box by described, described main access box forwards described Media Stream cancellation message to described from access box, sends described Media Stream cancellation message from the forwarding-table item accessing box to the social resource that monitors that described Media Stream to be cancelled is corresponding according to described from access case daughter root so that described.
6. a forwarding media stream device, it is characterised in that described device is applied to include that in the video monitoring system that proxy for equipment, society monitor resource and multiple access box, this device includes as main access box:
Judge module, when receiving the monitoring business request coming from described proxy for equipment, it is judged that whether the access capability of self disclosure satisfy that the bandwidth demand that described monitoring business is asked,
Processing module, when the access capability that described judge module determines described equipment cannot meet described bandwidth demand, according to other access boxes competence sets determine for forwarding media stream from access box, and to described proxy for equipment send tunnel set up request；Described competence set includes media business ability and the access capability of described access box, described tunnel sets up request for making described proxy for equipment create and issue new network segment virtual address pond, and to make described proxy for equipment be self setting virtual network Protocol IP address corresponding with described network segment virtual address pond；
Notification module, notice is described from accessing the virtual channel that box is corresponding with described network segment virtual address pond with the foundation of described proxy for equipment, and obtains the virtual address corresponding with described virtual channel；
Sending module, message is set up to the described Media Stream sent with described virtual ip address as source address from access box, set up, according to described Media Stream, the social monitoring resource request Media Stream that message is specified to the request of described monitoring business from access case daughter root so that described, and the Media Stream received is sent to described proxy for equipment by described virtual channel.
7. device as claimed in claim 6, it is characterised in that also include:
Initialization module, after described proxy for equipment creates and issues original net section virtual address pond and is self to arrange initial virtual IP address according to described initial network segment virtual address pond, set up the virtual channel between described proxy for equipment, and it is obtained from the virtual address in described virtual channel according to described initial network segment virtual address pond, the virtual address of main access box maps to the physical address of described society monitoring resource, and resource is corresponding is configured in described proxy for equipment with described society monitoring.
8. device as claimed in claim 7, it is characterised in that also include:
Receiver module, receive other and access the competence set information that box reports when registration, and described described from accessing competence set more fresh information and the forwarding-table item that box reports from accessing reception after the described Media Stream received is sent by box by described virtual channel to described proxy for equipment；
Remove module, determining described from accessing way that box tunnel forwards for being described to arrange intervalometer from accessing box time empty according to described from accessing the competence set more fresh information that reports of box；Described intervalometer for indicate described main access box timing expire and described from access box do not receive remove when Media Stream sets up message described from the virtual channel accessed between box and described proxy for equipment；
Wherein, described access capability be described access box media business ability and built vertical Media Stream shared by the difference of bandwidth；Described main access box has the forwarding-table item of the corresponding relation of real ip address and the described initial virtual IP address comprising described main access box；Described from accessing the forwarding-table item box with the corresponding relation comprising the described real ip address from access box and described virtual ip address.
9. device as claimed in claim 8, it is characterised in that also include:
Select module, access at described other and box selects and specifies standby access box；
Synchronization module, synchronizes all virtual ip address of described proxy for equipment, each competence set accessing box and forwarding-table item according to the default cycle to described standby access box.
10. the device as described in any one of claim 6-9, it is characterised in that also include:
Cancel module, when receiving described proxy for equipment and cancelling message by the Media Stream that described initial virtual IP address sends, determine and cancel Media Stream to be cancelled corresponding to message with described Media Stream, and according to the forwarding-table item of described main access box determine described in Media Stream to be cancelled whether by the forwarding of described main access box；
If Media Stream to be cancelled described in is forwarded by described main access box, and described cancellation module sends described Media Stream according to the forwarding-table item of described main access box to society's monitoring resource that described Media Stream to be cancelled is corresponding and cancels message；
If Media Stream to be cancelled described in is forwarded from access box by described, described cancellation module forwards described Media Stream cancellation message to described from access box, sends described Media Stream cancellation message from the forwarding-table item accessing box to the social resource that monitors that described Media Stream to be cancelled is corresponding according to described from access case daughter root so that described.
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