CN101977148B - Data exchange method and system of node media servers of content delivery network - Google Patents
Data exchange method and system of node media servers of content delivery network Download PDFInfo
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Abstract
The invention discloses a data exchange method and system of the node media servers of a content delivery network (CDN). The method comprises the following steps: after starting, the media servers send the corresponding IP addresses and MAC addresses to an exchange controller and also inform the exchange controller when the IP addresses and/or MAC addresses are changed; the exchange controller establishes and updates the media forwarding table of the CDN node according to the received IP addresses and MAC addresses of the media servers, and also updates the media forwarding table in the media servers; when data exchange is performed between the media servers in the node, the MAC address of the target media server is obtained through the local media forwarding table and the IP Encapsulation of the data message is performed. By using the method and system of the invention, the problem that when data exchange is performed between the node media servers in the traditional CDN, data packet flooding may be caused, can be solved.
Description
Technical field
The present invention relates to the mutual field of media data, to particularly relate in CDN (Content Distribution Network, content distributing network) node media data exchange method and system between media server.
Background technology
Along with the fast development of the Internet and multimedia industry, various memory technology and storage system have also been obtained develop rapidly.These storage systems be the internet information of magnanimity and multimedia data information is provided convenience, fast and efficiently store and access services.
Media server is as a part for storage system, be widely used in IPTV (Internet Protocol Television, IPTV) the CDN business such as system on-demand server in, for storage and the reading of individual node (each node provide service for a region or a part of user) interior data.Along with the raising of user's request, need the data volume of storage also increasing in CDN service application, individual node will provide complete service to need the memory space of magnanimity.Simultaneously in the increasing situation of user, more media server is needed to provide service, each media server provides storage and media data to send service simultaneously, this will bring great difficulty to the management of the media server media data Internet, even cause whole node media services quality to reduce.
Summary of the invention
The object of this invention is to provide the method and system of data interaction between a kind of content delivery network node media server, when solving data interaction between the CDN node media server that exists in traditional technology, when utilizing ARP protocol stack to carry out message encapsulation, utilize broadcast addressing mode, the problems such as the recovery of MAC Address and heavy learning process and the packet that causes thereof flood may be caused.
In order to solve the problem, the invention provides the method for data interaction between a kind of content distributing network (CDN) node media server, this CDN node comprises two or more media servers and at least one exchange control unit, and the method comprises:
The IP address of respective place media server and MAC Address are sent to described exchange control unit after starting by described media server, and notify described exchange control unit when described IP address and/or MAC Address change;
Described exchange control unit creates according to the IP address of each media server received and MAC Address and upgrades the media forwarding table of this CDN node, and this media forwarding table is synchronized to described media server;
When sending message between described media server, source media server obtains the MAC Address of object media server according to this media forwarding table, after carrying out IP encapsulation, is sent to object media server through described exchange control unit to message.
Preferably, this media forwarding table is synchronized to described media server and is completed by one or more modes following by described exchange control unit:
The more fresh content of this media forwarding table or this media forwarding table, after upgrading local media forwarding table, is sent to described media server by least one in described exchange control unit, and described media server receives the rear media forwarding table upgrading this locality;
At least one this media forwarding table synchronous in exchange control unit described in described media server timing request, this media forwarding table is sent to described media server by the exchange control unit receiving request, and described media server upgrades local media forwarding table;
At least one this media forwarding table of timing multicast in described exchange control unit is to described media server, and described media server receives the rear media forwarding table upgrading this locality.
Preferably, the described exchange control unit of this CDN node has two or more, and described media server medium surface has two or more network interfaces, is connected respectively to different exchange control units;
The state information of respective medium surface all-network interface is also sent to described exchange control unit after starting by described media server, and when the state variation of network interface exchange control unit described in real-time informing, whether the link between the state representation of certain network interface this network interface and exchange control unit can be used;
The state information of each media server medium surface all-network interface is also comprised in this media forwarding table of described exchange control unit establishment and maintenance.
Preferably, before described source media server sends message, also comprise the step of carrying out Path selection: source media server is first according to the state of source media server in this media forwarding table and object media server medium surface all-network interface, select through the mulitpath of different exchange control unit between source media server to object media server, mode is as follows:
If there is no available path, then message wouldn't be sent;
If there is an available path, then use this path;
If there is two or more available path, then select wherein one.
Preferably, described in carry out in the step of Path selection, the also each path selected of record, when this selects have two or more path available, the policy selection evenly used by each paths is different from a paths in path last time.
Preferably, described CDN node also comprises media explorer, for managing the network interface resources of described media server;
Before obtaining service as the media server of service request terminal from described media server, first to described media explorer log on interface resource, described media explorer to distribute for this service request terminal according to load balancing principle can provide media server and the network interface information thereof of service, and upgrades current network interface resources; After service terminates, described media explorer reclaims the network interface resources distributed.
For solving the problem, present invention also offers the system of data interaction between content delivery network node media server, this CDN node comprises two or more media servers and at least one exchange control unit, this system comprises the information reporting device in described media server, synchronous receiving system and packet sending and receiving device, and apparatus for management of information, synchronized transmission device and the apparatus for forwarding message in described exchange control unit; Wherein:
Described information reporting device is used for, after described media server starts, the IP address of respective place media server and MAC Address are sent to described exchange control unit, and notifies described exchange control unit when described IP address and/or MAC Address change;
Described apparatus for management of information is used for described exchange control unit according to the IP address of each media server received and MAC Address, creates and upgrade the media forwarding table of this CDN node;
Described synchronized transmission device is used for this media forwarding table to be issued to described synchronous receiving system;
Described synchronous receiving system is used for creating on a media server and upgrading this media forwarding table;
Described packet sending and receiving device for receiving and dispatching message, and when sending message, obtaining the MAC Address of object media server, after carrying out the encapsulation of IP message, being sent to described apparatus for forwarding message to message according to this media forwarding table;
Described apparatus for forwarding message be used for will the message repeating that receive to object media server.
Preferably, also comprise the synchronization request device in described media server, issue described media forwarding table for synchronized transmission device described in timing request; And/or
Described in described synchronized transmission device timing multicast, media forwarding table is to described media server.
Preferably, the described exchange control unit of this CDN node two or more, described media server medium surface has two or more network interfaces, is connected respectively to different exchange control units;
Described information reporting device also for being also sent to described exchange control unit by the state information of respective medium surface all-network interface after media server starts, and when the state variation of network interface exchange control unit described in real-time informing, whether the link between the state representation of certain network interface this network interface and exchange control unit can be used;
Described apparatus for management of information also for also comprising the state information of each media server medium surface all-network interface in this media forwarding table of exchange control unit establishment and maintenance.
Preferably, described media server also comprises the device of Path selection, before sending message at packet transmission device, source media server is first according to the state of source media server in this media forwarding table and object media server medium surface all-network interface, select through the mulitpath of different exchange control unit between source media server to object media server, mode is as follows:
If there is no available path, then message wouldn't be sent;
If there is an available path, then use this path;
If there is two or more available path, then the policy selection evenly used by each paths is different from a paths in path last time.
Present invention employs the mechanism that a kind of media forwarding table encapsulates data message, be used for the addressing of alternative existing ARP protocol stack, internet message between media server can be reduced mutual, avoid the recovery of MAC Address and heavy learning process and the packet that causes floods, thus reach the object of memory reliability of improving service quality, ensure.When carrying out data interaction between media server, media forwarding table mechanism also can be adopted effectively to solve Path Selection, simultaneously in the process selecting network transmission path, also can efficient balance offered load, avoid causing internal network congested.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of the embodiment of the present invention;
Fig. 2 is the overview flow chart of data interactive method between embodiment of the present invention CDN node media server;
Fig. 3 is the signaling time-sequence schematic diagram of embodiment of the present invention media forwarding table creation method;
Fig. 4 is the signaling time-sequence schematic diagram of embodiment of the present invention media forwarding table updating method;
Fig. 5 is the flow chart of embodiment of the present invention media path system of selection;
Fig. 6 is the path schematic diagram of an example of Fig. 5 media path system of selection.
Embodiment
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The system architecture of first composition graphs 1 pair of embodiment of the present invention is described:
The system architecture of the embodiment of the present invention comprises following components:
Media server: for media data Storage and Processing unit in CDN node;
Exchange control unit: for media forwarding in CDN node;
Have two or more media servers and at least one exchange control unit in embodiment of the present invention system, these media servers are all connected with exchange control unit.When having two or more exchange control units, each media server is connected from different exchange control units by the network interface of different medium surfaces.There to be two exchange control units in Fig. 1, be expressed as the first exchange control unit and the second exchange control unit.
Based on above-mentioned framework, between the CDN node media server provided the embodiment of the present invention below in conjunction with Fig. 2, data interactive method is described, and the method comprises:
Step 10, media server start after the state information of respective address information and network interface is sent to exchange control unit, and when these change real-time informing exchange control unit;
Network address information comprises IP address and MAC Address, and the state of certain network interface is for representing whether the link between this network interface to exchange control unit can be used.
Step 20, exchange control unit creates according to the state information of the address information of each media server received and medium surface all-network interface and upgrades the media forwarding table of this CDN node, and this media forwarding table is synchronized to media server;
This media forwarding table is synchronized to that media server can be completed by one or more modes following by exchange control unit:
The more fresh content of this media forwarding table or this media forwarding table, after upgrading local media forwarding table, is sent to media server by least one of exchange control unit, and media server receives the rear media forwarding table upgrading this locality;
At least one this media forwarding table synchronous of media server timing request exchange control unit, this media forwarding table is sent to media server by the exchange control unit receiving request, and media server upgrades local media forwarding table;
At least one this media forwarding table of timing multicast in exchange control unit is to media server, and media server receives the rear media forwarding table upgrading this locality.
Step 30, when sending message between media server, source media server obtains the MAC Address of object media server according to this media forwarding table, complete the IP encapsulation of message, and carry out Path selection according to the state information of source, object media server medium surface all-network interface, be forwarded to object media server through corresponding exchange control unit.
Before source media server sends message, can according to the state of source media server in this media forwarding table and object media server medium surface all-network interface, select through the mulitpath of different exchange control unit between source media server to object media server: if there is no available path, then wouldn't send message; If there is an available path, then use this path; If there is two or more available path, then select wherein one.On selection strategy, can record each path selected, when this selects have two or more path available, the policy selection evenly used by each paths is different from a paths in path last time.
It should be noted that, the exchange control unit in CDN node can only have one, is generally two, also may have two or more.In another embodiment, the state information of the network interface of each media controller can not had in media forwarding table, after exchange control unit receives the message of source media server transmission, the Link State between object media server can be searched, select available path by message to object media server.
The following describes establishment and the renewal of media forwarding table, and the specific implementation of the method such as the encapsulation of message and Path selection.
Please refer to the signaling time-sequence of Fig. 3, there to be two exchange control units in CDN node in figure, the creation method of the present embodiment media forwarding table comprises:
After media server starts in step 100:CDN node, report the information such as IP address, MAC Address and network interface state to exchange control unit;
In the present embodiment, when having two or more media servers in CDN node, media server reports to two or more exchange control units.In another embodiment, media server also can only an exchange control unit such as main exchange control unit wherein report, and now, will carry out the synchronized update of media forwarding table between main exchange control unit and other exchange control unit for subsequent use in real time.
Step 110: exchange control unit creates media forwarding table, records the IP address of all media servers in node, MAC Address and network interface state information;
Step 120: if media server does not have local media to transmit, sends media forwarding table synchronization request at least one exchange control unit;
In the present embodiment, when having two or more exchange control units in CDN node, a media server exchange control unit is wherein as main exchange control unit media forwarding table synchronization request, and the first exchange control unit in Fig. 3 works in main-use mode, as main exchange control unit.In another embodiment, media server also can send media forwarding table synchronization request to two or more exchange control units.
Step 130: exchange control unit receives the request that media server sends, sends the syn ack of media forwarding table to media server, carries local media forwarding table;
Step 140: the media forwarding table that exchange control unit sends by media server saves as local media and transmits.
Please refer to the signaling time-sequence of Fig. 4, there to be two exchange control units in CDN node in figure, the update method of media forwarding table comprises:
Step 200: in node media server IP address, MAC Address and network interface state is one or more change after, report change information to exchange control unit;
If there are two or more exchange control units, media server is reported to two or more exchange control units, and in Fig. 4, simultaneously media server is reported to exchange control unit on two.But in another embodiment, one of them exchange control unit also can be reported to as main exchange control unit, then carry out real-time synchronized update by between each exchange control unit.
Step 210: exchange control unit receives this lastest imformation, upgrades media forwarding table;
Step 220, at least one in exchange control unit, by more fresh content multicast in node of this media forwarding table or this media forwarding table, is sent to media server;
In Fig. 4, the first exchange control unit as main exchange control unit carries out multicast, but also can be that two exchange control units all carry out multicast.
Step 230, media server upgrades local media forwarding table;
Step 240: media server timing sends media forwarding table synchronization request at least one in exchange control unit;
In Fig. 4, media server sends media forwarding table update request to the first exchange control unit as main exchange control unit, starts timer simultaneously.
Step 250: the exchange control unit receiving request returns the syn ack of media forwarding table to media server, carries current media forwarding table or the more fresh content of this media forwarding table;
Step 260: media server upgrades local media forwarding table;
Step 270: at least one timing multicast media of exchange control unit transmit or the more fresh content of this media forwarding table to the media server in node;
In Fig. 4, the first exchange control unit as main exchange control unit carries out timing multicast, restarts timer after each multicast.
Step 280: media server upgrades local media and transmits.
It should be noted that, above-mentioned steps 220-230, step 240 is to 260, and step 270 forms a kind of method of synchronization respectively to 280, and these methods of synchronization can be used alone and also can use simultaneously, and do not have the restriction of sequencing each other.
Below in conjunction with Fig. 5 and Fig. 6, the method that media path is selected is described in detail:
Generally there are at least two network interfaces in media server internal media face, and this sentences two for example, is connected respectively to different exchange control units.The spendable path of such media server generally just has two, definition two, Media network interfaces state information field end represents the using state of two paths, four kinds of numerical value 00,01,10,11 can be had, " 0 " represents that one of them network interface is unavailable to the link of exchange control unit, and " 1 " represents available.
As shown in Figure 5, the flow process of Path selection comprises:
Step 310: media server transmits two X in Media network interfaces state information field end of middle acquisition source media server from local media;
Step 320: two Y in Media network interfaces state information field end transmitting middle acquisition object media server from local media;
Step 330: the arithmetic "AND" value of getting low dibit X and Y of Media network interfaces state information field in two entries, obtains Z=X & Y;
Step 340: if Z equals Binary Zero 0, then represent inner two media paths all faults, can send message;
Step 350: if Z equals Binary Zero 1 or binary one 0, then represent and only have an internal media Path Connection normally, uses available media path to send media message.
Step 360: if Z equals binary one 1, represents that between this media server to other media server, two media paths are all normal, therefrom can select an internal media path.
Can select arbitrarily during selection.Preferably, consider load sharing design, the path at every turn selected is recorded in a global information field; Selecting paths and when having two or more path to select next time, then select another media path outside recorded information, accomplish two media path load sharings.Have more paths time can rotation use.
During based on system architecture shown in Fig. 1, please refer to Fig. 6, two paths by the first exchange control unit or the second exchange control unit between source media server and object media server, can be had.Wherein, every paths comprises two sections of links, one section is the link between source media server and the first exchange control unit or the second exchange control unit, one section is the link between object media server and the first exchange control unit or the second exchange control unit, the state of the network interface be connected with the first exchange control unit according to source media server can know that whether the link between source media server and the first exchange control unit is normal, and other several sections of links are similar.Therefore to the state of the network interface of each exchange control unit, just can know whether source media server can be used to each paths of object media server by source, object media server in inquiry media forwarding table.For example, source media server is normal to the network interface state of the first exchange control unit, and object media server normal to the network interface state of the first exchange control unit time, then can use through the path of the first exchange control unit between source media server and object media server.
Below the flow process of data message encapsulation is elaborated:
Step one: source media server transmits acquisition target MAC (Media Access Control) address according to local media;
In the embodiment of the present invention, media server can obtain the MAC Address of object media server from media forwarding table according to the IP address of object media server.Can be completed this by the bottom layer driving module of media server to operate.
Step 2: the IP encapsulation of the complete paired data message of source media server;
Message header field can comprise IP packet number, UDP source port, UDP destination interface, source IP address, object IP address, source MAC and target MAC (Media Access Control) address information etc.
Step 3: described message is sent to object media server through exchange control unit after completing the IP encapsulation of message by source media server;
In prior art, data message encapsulation is carried out by IP stack, wherein target MAC (Media Access Control) address is realized by ARP protocol stack, the present invention can by being encapsulated in the bottom layer driving module of media server, from media forwarding table, obtain the information such as object MAC carry out data message encapsulation, avoid broadcast when ARP protocol stack carries out addressing and may produce network resources waste, the phenomenons such as network congestion.
Also comprise the method for media server network interface resource scheduling in embodiment of the present invention method, a media explorer be connected be set in CDN node, be described in detail as follows with each media server:
Step one: as the media server of service request terminal, to media explorer log on interface resource;
Step 2: media explorer can provide media server and the network interface information thereof of service according to load balancing principle for distributing as the media server of service request terminal, and upgrades current network interface resources;
Step 3: after service terminates, described media explorer reclaims the media server and network interface resources thereof that distribute.
Correspondingly, the embodiment of the present invention additionally provides the system of data interaction between CDN node media server.
Wherein, comprise the information reporting device in media server, synchronous receiving system and synchronization request device for the device created and upgrade media forwarding table, and apparatus for management of information in exchange control unit and synchronized transmission device
Described information reporting device is used for, after described media server starts, the IP address of respective place media server and MAC Address are sent to described exchange control unit, and notifies described exchange control unit when described IP address and/or MAC Address change; Network interface state information is sent to described exchange control unit after also starting for described media server by described information reporting device, and notifies described exchange control unit when described network interface state information changes;
Described apparatus for management of information is used for described exchange control unit and creates according to the IP address of each media server received and MAC Address and upgrade the media forwarding table of this CDN node; Described apparatus for management of information also creates for exchange control unit and also comprises the state information of each media server medium surface all-network interface in this media forwarding table of safeguarding;
Described synchronized transmission device is used for this media forwarding table to be issued to described synchronous receiving system;
Synchronization request device in described media server, issues described media forwarding table for synchronized transmission device described in timing request; And/or media forwarding table described in described synchronized transmission device timing multicast is to described media server;
The device wherein received and dispatched for data message comprises the packet sending and receiving device in media server, and the apparatus for forwarding message in exchange control unit:
Described packet sending and receiving device, for receiving and dispatching message, and when sending message, carrying out the encapsulation of IP message according to the network information in this media forwarding table, being sent to described apparatus for forwarding message;
Described apparatus for forwarding message be used for will the message repeating that receive to object media server.
The device wherein received and dispatched for data message comprises the packet sending and receiving device in media server, and the apparatus for forwarding message in exchange control unit:
Described packet sending and receiving device for receiving and dispatching message, and when sending message, obtaining the MAC Address of object media server, after carrying out the encapsulation of IP message, being sent to described apparatus for forwarding message to message according to this media forwarding table;
Described apparatus for forwarding message is used for the message received to be sent to object media server.
Two described network interfaces are had at least at media server medium surface, when being connected respectively to exchange control units different in this CDN node, this system can also comprise for the media path choice device in the media server of Path selection, before sending message at packet transmission device, first according to the network interface state of source media server and object media server in this media forwarding table, select the mulitpath between source media server to object media server, mode is as follows:
If there is no available path, then message wouldn't be sent;
If there is an available path, then use this path;
If there is two or more available path, then select wherein one.
Preferably, when described Path selection equipment carries out Path selection, the also each path selected of record, when this selects have two or more path available, the policy selection evenly used by each paths is different from a paths in path last time.
Wherein this system can also comprise media explorer, for managing the network interface resources of described media server;
After described media explorer receives the resource bid that the media server as service request terminal sends, according to load balancing principle for this service request terminal distributes media server and the network interface information thereof that can provide service, and upgrade current network interface resources; And after service terminates, reclaim the network interface resources distributed.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; the present invention also can have other numerous embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a method for data interaction between content distributing network CDN node media server, this CDN node comprises two or more media servers and at least one exchange control unit, and the method comprises:
The IP address of respective place media server and MAC Address are sent to described exchange control unit after starting by described media server, and notify described exchange control unit when described IP address and/or MAC Address change;
Described exchange control unit creates according to the IP address of each media server received and MAC Address and upgrades the media forwarding table of this CDN node, and this media forwarding table is synchronized to described media server;
When sending message between described media server, source media server obtains the MAC Address of object media server according to this media forwarding table, after carrying out IP encapsulation, is sent to object media server through described exchange control unit to message;
The described exchange control unit of this CDN node has two or more, and described media server medium surface has two or more network interfaces, is connected respectively to different exchange control units;
The state information of respective medium surface all-network interface is also sent to described exchange control unit after starting by described media server, and when the state variation of network interface exchange control unit described in real-time informing, whether the link between the state representation of certain network interface this network interface and exchange control unit can be used;
The state information of each media server medium surface all-network interface is also comprised in this media forwarding table of described exchange control unit establishment and maintenance.
2. the method for claim 1, is characterized in that, this media forwarding table is synchronized to described media server and is completed by one or more modes following by described exchange control unit:
The more fresh content of this media forwarding table or this media forwarding table, after upgrading local media forwarding table, is sent to described media server by least one in described exchange control unit, and described media server receives the rear media forwarding table upgrading this locality;
At least one this media forwarding table synchronous in exchange control unit described in described media server timing request, this media forwarding table is sent to described media server by the exchange control unit receiving request, and described media server upgrades local media forwarding table;
At least one this media forwarding table of timing multicast in described exchange control unit is to described media server, and described media server receives the rear media forwarding table upgrading this locality.
3. method as claimed in claim 1 or 2, is characterized in that:
Before described source media server sends message, also comprise the step of carrying out Path selection: source media server is first according to the state of source media server in this media forwarding table and object media server medium surface all-network interface, select through the mulitpath of different exchange control unit between source media server to object media server, mode is as follows:
If there is no available path, then message wouldn't be sent;
If there is an available path, then use this path;
If there is two or more available path, then select wherein one.
4. method as claimed in claim 3, is characterized in that:
Describedly carry out in the step of Path selection, also each path selected of record, when this selects have two or more path available, the policy selection evenly used by each paths is different from a paths in path last time.
5. the method for claim 1, is characterized in that:
Described CDN node also comprises media explorer, for managing the network interface resources of described media server;
Before obtaining service as the media server of service request terminal from described media server, first to described media explorer log on interface resource, described media explorer to distribute for this service request terminal according to load balancing principle can provide media server and the network interface information thereof of service, and upgrades current network interface resources; After service terminates, described media explorer reclaims the network interface resources distributed.
6. the system of data interaction between a content distributing network CDN node media server, this CDN node comprises two or more media servers and at least one exchange control unit, this system comprises the information reporting device in described media server, synchronous receiving system and packet sending and receiving device, and apparatus for management of information, synchronized transmission device and the apparatus for forwarding message in described exchange control unit; Wherein:
Described information reporting device is used for, after described media server starts, the IP address of respective place media server and MAC Address are sent to described exchange control unit, and notifies described exchange control unit when described IP address and/or MAC Address change;
Described apparatus for management of information is used for described exchange control unit according to the IP address of each media server received and MAC Address, creates and upgrade the media forwarding table of this CDN node;
Described synchronized transmission device is used for this media forwarding table to be issued to described synchronous receiving system;
Described synchronous receiving system is used for creating on a media server and upgrading this media forwarding table;
Described packet sending and receiving device for receiving and dispatching message, and when sending message, obtaining the MAC Address of object media server, after carrying out the encapsulation of IP message, being sent to described apparatus for forwarding message to message according to this media forwarding table;
Described apparatus for forwarding message be used for will the message repeating that receive to object media server;
The described exchange control unit of this CDN node has two or more, and described media server medium surface has two or more network interfaces, is connected respectively to different exchange control units;
Described information reporting device also for being also sent to described exchange control unit by the state information of respective medium surface all-network interface after media server starts, and when the state variation of network interface exchange control unit described in real-time informing, whether the link between the state representation of certain network interface this network interface and exchange control unit can be used;
Described apparatus for management of information also for also comprising the state information of each media server medium surface all-network interface in this media forwarding table of exchange control unit establishment and maintenance.
7. system as claimed in claim 6, is characterized in that:
Also comprise the synchronization request device in described media server, issue described media forwarding table for synchronized transmission device described in timing request; And/or
Described in described synchronized transmission device timing multicast, media forwarding table is to described media server.
8. system as claimed in claims 6 or 7, is characterized in that;
Described media server also comprises path selection device, before sending message at packet transmission device, first according to the state of source media server in this media forwarding table and object media server medium surface all-network interface, select through the mulitpath of different exchange control unit between source media server to object media server, mode is as follows:
If there is no available path, then message wouldn't be sent;
If there is an available path, then use this path;
If there is two or more available path, then the policy selection evenly used by each paths is different from a paths in path last time.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005456A (en) * | 2006-12-30 | 2007-07-25 | 华为技术有限公司 | Medium stream repeat method and medium server |
| CN101026631A (en) * | 2006-12-28 | 2007-08-29 | 中兴通讯股份有限公司 | CDN structure based IPTV system media payment system |
| CN101582834A (en) * | 2008-05-16 | 2009-11-18 | 华为技术有限公司 | Updating method, equipment and system of forwarding table during service transmission of Ethernet |
| CN101741712A (en) * | 2008-11-18 | 2010-06-16 | 华为技术有限公司 | Device, system and method supporting base station data exchange |
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| EP1504370A4 (en) * | 2002-05-14 | 2008-05-21 | Akamai Tech Inc | Enterprise content delivery network having a central controller for coordinating a set of content servers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026631A (en) * | 2006-12-28 | 2007-08-29 | 中兴通讯股份有限公司 | CDN structure based IPTV system media payment system |
| CN101005456A (en) * | 2006-12-30 | 2007-07-25 | 华为技术有限公司 | Medium stream repeat method and medium server |
| CN101582834A (en) * | 2008-05-16 | 2009-11-18 | 华为技术有限公司 | Updating method, equipment and system of forwarding table during service transmission of Ethernet |
| CN101741712A (en) * | 2008-11-18 | 2010-06-16 | 华为技术有限公司 | Device, system and method supporting base station data exchange |
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