CN104580263B - IP based network selects optimal path forwarding media stream method - Google Patents
IP based network selects optimal path forwarding media stream method Download PDFInfo
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- CN104580263B CN104580263B CN201510072896.9A CN201510072896A CN104580263B CN 104580263 B CN104580263 B CN 104580263B CN 201510072896 A CN201510072896 A CN 201510072896A CN 104580263 B CN104580263 B CN 104580263B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
- H04L45/124—Shortest path evaluation using a combination of metrics
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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
- H04L65/80—Responding to QoS
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to IP based networks to select optimal path forwarding media stream method, and using incoming end access service end, address allocation server distributes the IP address of several target transfer servers to using incoming end according to the public network IP of application incoming end；Apply later incoming end separately detect using between incoming end and target transfer server delay, packet loss is to obtain detectable signal；Detectable signal is sent to the routing server of server-side using incoming end；Delay and packet loss between each transfer server of server-side mutually detects simultaneously obtain detectable signal, and the detectable signal is sent to the routing server of server-side；Routing server is according to the detectable signal for carrying out self-application incoming end and from the detectable signal of transfer server, calculate the optimal forward-path between two application incoming ends, it can guarantee Media Stream transmission low latency on the internet, low packet loss ratio, low jitter, ensure communication quality, improves user experience.
Description
Technical field
The present invention relates to the methods that the communication technology more particularly to IP based network select optimal path forwarding media stream.
Background technology
The high speed development of mobile Internet has expedited the emergence of all kinds of applications based on mobile Internet, also produces very mostly band
There is the application of Media Stream communication function.This kind of application is mainly based upon internet ip network transmission mediums stream (audio stream, video
Stream) realize interpersonal communication.Media on internet communicate to ensure that real-time is generally used UDP (numbers of users
According to packet protocol) it is transmitted.Since the complexity of internet and mobile terminal application access network police switch variation, interconnecting
Transfers on network Media Stream be susceptible to delay, packet loss, shake situations such as, and delay, packet loss, shake be influence media communicate imitate
The key factor of fruit, it is therefore desirable to have a kind of mechanism method ensure low latency, low packet loss that Media Stream transmits on the internet,
Low jitter ensures communication quality, improves user experience.
Invention content
For problem of the prior art, the purpose of the present invention is to provide a kind of selection optimal path forwardings of IP based network
Media Stream method can guarantee Media Stream transmission low latency on the internet, low packet loss ratio, low jitter, ensure communication quality,
Improve user experience.
To achieve the above object, the present invention adopts the following technical scheme that：
IP based network selects optimal path forwarding media stream method, includes the following steps：
Step 1：First application incoming end and second is respectively connected to server-side using incoming end；
Step 2：The address allocation server of server-side is accessed according to the public network IP and the second application of the first application incoming end
The public network IP at end distributes several while suitable for the target transfer server of the first application incoming end and the second application incoming end
IP address to first application incoming end and second apply incoming end, server-side distribution several target transfer servers definition
For target transfer server set；
Step 3：After first application incoming end and the second application incoming end obtain the IP address from address allocation server,
It separately detects between the first application incoming end and target transfer server set and the second application incoming end takes with target transfer
Delay time, packet loss between device set of being engaged in is to obtain the first detectable signal；
Step 4：First is sent to the first detectable signal using incoming end using incoming end and second routing of server-side
Server；
Step 5：The target transfer server set of server-side mutually detect between delay time and packet loss obtain
To the second detectable signal, and second detectable signal is sent to the routing server of server-side；
Step 6：Routing server calculates one first application access according to the first detectable signal and the second detectable signal
Optimal forward-path between end and the second application incoming end.
Preferably, step 3 includes following sub-step：
Step 31：First application incoming end and the second application incoming end obtain the IP address from address allocation server；
Step 32：First application incoming end and the second application incoming end are continuously sent to target transfer server set respectively
Multiple UDP detection packets with serial number；
Step 33：Target transfer server set is received from the first application incoming end and second using incoming end
Response bag is sent to the first application incoming end and the second application incoming end immediately after UDP detection packets；
Step 34：According to formula D after first response bag of the application incoming end reception from target transfer server set11=
t11/ 2 calculate the one-way latency time between the first application incoming end and target transfer server set；Second applies incoming end
According to formula D after response bag of the reception from target transfer server set12=t12/ 2, which calculate second, applies incoming end and mesh
Mark the one-way latency time between transfer server set, wherein t11To apply incoming end to target transfer server from first
Set sends out detection packet and receives all time of the response bag from target transfer server set using incoming end to first,
t12It is come to send out to detect to wrap to second to receive using incoming end from the second application incoming end to target transfer server set
The response bag of target transfer server set all time, D11For the first application incoming end and target transfer server set it
Between the one-way latency time, D12For the one-way latency time between the second application incoming end and target transfer server set；And
And first applies incoming end according to formula：L1=(M1-N1)/M1It calculates between the first application incoming end and target transfer server
Packet loss, wherein L1For the packet loss between the first application incoming end and target transfer server, M1For target transfer service
The number for the response bag that device is sent to the first application incoming end, N1The number of the response bag received using incoming end for first；
Second application incoming end is according to formula：L2=(M2-N2)/M2It calculates between the second application incoming end and target transfer server
Packet loss, wherein L2For the packet loss between the second application incoming end and target transfer server, M2For target transfer server
The number of the response bag sent to the second application incoming end, N2The number of the response bag received using incoming end for second.
Preferably, step 5 includes following sub-step：
Step 51：Any one target transfer server of target transfer server set continuously takes to other target transfers
Business device sends multiple UDP detection packets with serial number；
Step 52：Other target transfer servers receive UDP detections packet later immediately to the target for sending UDP detection packets
Transfer server sends response bag；
Step 53：The target transfer server for sending UDP detection packets receives after response bag according to formula D2=t2/ 2 calculate
Go out its one-way latency time between other transfer servers, wherein D2To send the target transfer server of UDP detection packets
With the one-way latency time between other target transfer servers, t2Target transfer server to send UDP detection packets is sent out
The beginning to the time for receiving response bag is unwrapped in detection；Also, target transfer server is according to formula：L2=(M2-N2)/M2It calculates
Packet loss between target transfer server and other target transfer servers, wherein L2For target transfer server and other
Packet loss between target transfer server, M2The response bag sent to target transfer server for other target transfer servers
Number, N2The number of response bag is received for target transfer server；Target transfer server set will detect respectively
Packet loss and delay time are that the second detectable signal is sent to routing server.
Preferably, step 6 includes following sub-step：
Step 61：Routing server receives the first detectable signal and the second detectable signal；
Step 62：Any two target transfer service in target transfer server set is calculated according to formula V=D+ (L*L)
Network quality parameters between network quality parameters between device, the first application incoming end and target transfer server set or
Network quality parameters between second application incoming end and target transfer server set, wherein V is network quality parameters, and D is
One-way latency time, the second application incoming end and target transfer between first application incoming end and target transfer server set
In the one-way latency time or target transfer server set between server set any two target transfer server it
Between the one-way latency time, unit ms, L are that the packet loss between the first application incoming end and target transfer server set multiplies
With 100 gained value, second application incoming end and target transfer server set between packet loss be multiplied by 100 gained value or
Packet loss in person's target transfer server set between any two target transfer server is multiplied by the value of 100 gained；
Step 63：Path length modeling between using V as 2 points, and answered with finding out one first according to Djikstra algorithms
With the optimal forward-path between incoming end and the second application incoming end.
Preferably, it further includes later following steps to complete step 6：
Step 7：Routing server is distributed and is taken with the transfer of optimal forward-path according to calculated optimal forward-path
The transfer port of business device to the first application incoming end and second applies incoming end.
Compared with prior art, the beneficial effects of the present invention are：
From the aspect of application incoming end and the transfer server two of server-side, the network quality of the two is carried out comprehensive point
It analyses and considers, select optimal forward-path between one first application incoming end and the second application incoming end, can ensure media
Low latency, the low packet loss ratio transmitted on the internet are flowed, ensures communication quality.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the present invention is described further：
Referring to Fig. 1, the IP based network of the present embodiment selects optimal path forwarding media stream method, includes the following steps：
Step s1：First application incoming end and second is respectively connected to server-side using incoming end；
Step s2：The address allocation server of server-side is accessed according to the public network IP and the second application of the first application incoming end
The public network IP at end distributes several while suitable for the target transfer server of the first application incoming end and the second application incoming end
IP address to first application incoming end and second apply incoming end, server-side distribution several target transfer servers definition
For target transfer server set；Server-side is known that the first application incoming end and second using incoming end by public network IP
Operator, location, according to the two information, server-side dynamically distributes most 5 with operator's similarity priority principle
The IP address of the transfer server in corresponding same operator and area, area matching are selected with nearby principle, further preferably out
The IP address of several transfer servers builds up an IP list and is sent to the first application incoming end and second using incoming end；
Step s3：First application incoming end and the second application incoming end obtain in the IP lists from address allocation server
IP address；
Step s4：First application incoming end and the second application incoming end are according to IP address, to target transfer server set
Active probe is carried out, continuously sending multiple UDP with serial number to target transfer server set respectively detects packet；UDP is detected
The quantity of packet is preferably 10；
Step s5：Target transfer server set is received from the first application incoming end and second using incoming end
Response bag is sent to the first application incoming end and the second application incoming end immediately after UDP detection packets；
Step s6：First receives the response bag from target transfer server set using incoming end within the preset time
Afterwards according to formula D11=t11/ 2 calculate first application incoming end and target transfer server set between one-way latency when
Between；According to formula D after second response bag of the application incoming end reception from target transfer server set12=t12/ 2 calculate
The one-way latency time between second application incoming end and target transfer server set, wherein t11To be accessed from the first application
It holds to send out to detect to wrap to first to transfer server set and receives the response bag from transfer server set using incoming end
Time used, t12To send out detection packet to second using incoming end from the second application incoming end to target transfer server set
Receive all time of the response bag from target transfer server set, D11It is taken with target transfer for the first application incoming end
One-way latency time between device set of being engaged in, D12Unidirectionally prolonging between the second application incoming end and target transfer server set
The slow time；Also, the first application incoming end is according to formula：L1=(M1-N1)/M1Calculate the first application incoming end and target transfer
Packet loss between server, wherein L1For the packet loss between the first application incoming end and target transfer server, M1For mesh
Mark the number for the response bag that transfer server is sent to the first application incoming end, N1The response received using incoming end for first
The number of packet；Second application incoming end is according to formula：L2=(M2-N2)/M2Calculate the second application incoming end and target transfer service
Packet loss between device, wherein L2For the packet loss between the second application incoming end and target transfer server, M2For in target
Turn the number for the response bag that server is sent to the second application incoming end, N2The response bag received using incoming end for second
Number；For example, the first application incoming end default time for receiving response bag was 3 seconds, then whole response bags are received in 3 seconds,
Then illustrate non-packet loss, if the response bag that target transfer server is sent is 10, and is received in preset time using incoming end
The response arrived surrounds 9, then packet loss is 10%；
Step s7：First is sent to the first detectable signal using incoming end using incoming end and second routing of server-side
Server is preserved by routing server；
Step s8：Any one target transfer server of target transfer server set is continuously to other target transfer services
Device sends the UDP detection packets of multiple (such as 10) with serial number, and transfer server is deployed in server-side and reticulates structure, each mesh
Progress periodically detects mutually between marking transfer server；In fact, the transfer server of server-side used is periodically
It is detected each other, for example, server-side has tri- transfer servers of A, B, C, then A detects B, and A detects C, B pairs
A is detected, and B detects C, and C detects A, and C detects B, and the detection between transfer server can be with
It is carried out the first application incoming end, second using the detection between incoming end and transfer server is synchronous.
Step s9：Other target transfer servers receive UDP detections packet later immediately to the target for sending UDP detection packets
Transfer server sends response bag；
Step s10：The target transfer server for sending UDP detection packets receives after response bag according to formula D2=t2/ 2 meters
Calculate its one-way latency time between other transfer servers, wherein D2To send the target transfer service of UDP detection packets
One-way latency time between device and other target transfer servers, t2To send the target transfer server hair of UDP detection packets
Go out detection and unwraps the beginning to the time received used in response bag；Also, target transfer server is according to formula：L2=(M2-N2)/
M2Calculate the packet loss between target transfer server and other target transfer servers, wherein L2For target transfer server with
Packet loss between other target transfer servers, M2It is answered to what target transfer server was sent for other target transfer servers
Answer the number of packet, N2The number of response bag is received for target transfer server；Target transfer server set respectively will detection
To packet loss and delay time be the second detectable signal be sent to routing server；
Step s11：Routing server receives the first detectable signal and the second detectable signal；
Step s12：Routing server calculates any two in target transfer server set according to formula V=D+ (L*L)
Network quality parameters, the first application incoming end between target transfer server and the network between target transfer server set
Network quality parameters between mass parameter or the second application incoming end and target transfer server set, wherein V is network
Mass parameter, D are first using the one-way latency time between incoming end and target transfer server set, the second application access
Any two target in the one-way latency time or target transfer server set between end and target transfer server set
The one-way latency time between transfer server, unit ms, L be the first application incoming end and target transfer server set it
Between packet loss be multiplied by 100 gained value, second application incoming end and target transfer server set between packet loss be multiplied by
Packet loss in the value or target transfer server set of 100 gained between any two target transfer server is multiplied by 100
The value of gained, that is, if packet loss is 10%, L=10；
Step s13：Path length modeling between using network quality parameters V as 2 points, and with according to Djikstra algorithms
Find out the optimal forward-path between one first application incoming end and the second application incoming end；Djikstra algorithms solve be
Signal source shortest path problem.
Step s14：Routing server distributes the transfer with optimal forward-path according to calculated optimal forward-path
The transfer port of server to the first application incoming end and second applies incoming end.
In the present embodiment, the first application incoming end and second is using the active probe mode to target transfer server set
It is to obtain packet loss and delay time by sending detection packet as detection mode between each transfer server.
The present embodiment is considered at the first application incoming end, the second application incoming end and two aspect of server-side, and the first application is accessed
Network status between end, the second application incoming end and transfer server and the Network status between transfer server carry out
Comprehensive analysis is selected the optimal forwarding media stream path between one first application incoming end and the second application incoming end, is ensured
Media flow transmission.
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make various other
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (5)
1. IP based network selects optimal path forwarding media stream method, which is characterized in that include the following steps：
Step 1：First application incoming end and second is respectively connected to server-side using incoming end；
Step 2：The address allocation server of server-side is according to the public network IP and second of the first application incoming end using incoming end
Public network IP distributes several while suitable for the IP of the first application incoming end and the target transfer server of the second application incoming end
Incoming end, several target transfer servers of server-side distribution is applied to be defined as mesh to the first application incoming end and second in address
Mark transfer server set；
Step 3：After first application incoming end and the second application incoming end obtain the IP address from address allocation server, respectively
Between the first application incoming end of detection and target transfer server set and second using incoming end and target transfer server
Delay time and packet loss between set is to obtain the first detectable signal；
Step 4：First is sent to the first detectable signal using incoming end using incoming end and second the routing service of server-side
Device；
Step 5：The target transfer server set of server-side mutually detect between delay time and packet loss obtain
Two detectable signals, and second detectable signal is sent to the routing server of server-side；
Step 6：Routing server according to the first detectable signal and the second detectable signal, calculate one first application incoming end with
Optimal forward-path between second application incoming end.
2. IP based network as described in claim 1 selects optimal path forwarding media stream method, which is characterized in that step 3
Including following sub-step：
Step 31：First application incoming end and the second application incoming end obtain the IP address from address allocation server；
Step 32：First application incoming end and the second application incoming end continuously send to target transfer server set multiple respectively
UDP detection packets with serial number；
Step 33：Target transfer server set receives the UDP from the first application incoming end and the second application incoming end and visits
It surveys after packet and response bag is sent to the first application incoming end and the second application incoming end immediately；
Step 34：According to formula D after first response bag of the application incoming end reception from target transfer server set11=t11/2
Calculate the one-way latency time between the first application incoming end and target transfer server set；Second application incoming end receives
According to formula D after response bag from target transfer server set12=t12/ 2 calculate in the second application incoming end and target
Turn the one-way latency time between server set, wherein t11To apply incoming end to target transfer server set from first
Sending out to detect to wrap to first applies incoming end to receive the time used in the response bag from target transfer server set, t12For
Detection packet is sent out from the second application incoming end to target transfer server set to receive from target using incoming end to second
The response bag of transfer server set all time, D11Between the first application incoming end and target transfer server set
One-way latency time, D12For the one-way latency time between the second application incoming end and target transfer server set；Also, the
One application incoming end is according to formula：L1=(M1-N1)/M1Calculate losing between the first application incoming end and target transfer server
Packet rate, wherein L1For the packet loss between the first application incoming end and target transfer server, M1For target transfer server to
The number for the response bag that first application incoming end is sent, N1The number of the response bag received using incoming end for first；Second
Using incoming end according to formula：L2=(M2-N2)/M2Calculate the packet loss between the second application incoming end and target transfer server
Rate, wherein L2For the packet loss between the second application incoming end and target transfer server, M2It is target transfer server to
The number for the response bag that two application incoming ends are sent, N2The number of the response bag received using incoming end for second.
3. IP based network as described in claim 1 selects optimal path forwarding media stream method, which is characterized in that step 5
Including following sub-step：
Step 51：Any one target transfer server of target transfer server set is continuously to other target transfer servers
Send multiple UDP detection packets with serial number；
Step 52：Other target transfer servers receive the target transfer to transmission UDP detection packets immediately after UDP detection packets
Server sends response bag；
Step 53：The target transfer server for sending UDP detection packets receives after response bag according to formula D2=t2/ 2 calculate it
The one-way latency time between other transfer servers, wherein D2To send the target transfer server and its that UDP detections are wrapped
One-way latency time between his target transfer server, t2Target transfer server to send UDP detection packets sends out detection
Unwrap the beginning to the time for receiving response bag；Also, target transfer server is according to formula：L2=(M2-N2)/M2Calculate target
Packet loss between transfer server and other target transfer servers, wherein L2For target transfer server and other targets
Packet loss between transfer server, M2For for the response bag that other target transfer servers are sent to target transfer server
Number, N2The number of response bag is received for target transfer server；The packet loss that target transfer server set will detect respectively
Rate and delay time are that the second detectable signal is sent to routing server.
4. IP based network as described in claim 1 selects optimal path forwarding media stream method, which is characterized in that step 6
Including following sub-step：
Step 61：Routing server receives the first detectable signal and the second detectable signal；
Step 62：According to formula V=D+ (L*L) calculate target transfer server set in any two target transfer server it
Between network quality parameters, first application incoming end and target transfer server set between network quality parameters or second
Using the network quality parameters between incoming end and target transfer server set, wherein V is network quality parameters, D first
Using the one-way latency time between incoming end and target transfer server set, the second application incoming end and target transfer service
In the one-way latency time or target transfer server set between device set between any two target transfer server
One-way latency time, unit ms, L are that the packet loss between the first application incoming end and target transfer server set is multiplied by
100 gained value, second application incoming end and target transfer server set between packet loss be multiplied by 100 gained value or
Packet loss in target transfer server set between any two target transfer server is multiplied by the value of 100 gained；
Step 63：Path length modeling between using V as 2 points, and connect with finding out one first application according to Djikstra algorithms
Enter the optimal forward-path between end and the second application incoming end.
5. IP based network as described in claim 1 selects optimal path forwarding media stream method, which is characterized in that complete step
Further include following steps after rapid 6：
Step 7：Routing server distributes the transfer server with optimal forward-path according to calculated optimal forward-path
Transfer port to first application incoming end and second apply incoming end.
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| CN106100993B (en) * | 2016-06-13 | 2019-05-14 | 北京容联易通信息技术有限公司 | A kind of optimal route distribution method of Streaming Media |
| CN106941527B (en) * | 2017-03-15 | 2021-02-02 | 网宿科技股份有限公司 | Data transmission transfer method and system |
| CN112565832B (en) * | 2021-01-05 | 2021-06-15 | 北京创世云科技股份有限公司 | Stream media publishing system and method |
| CN116518875B (en) * | 2023-05-15 | 2023-12-29 | 山东省煤田地质局物探测量队 | Automatic three-dimensional laser scanner for topographic mapping and operation method thereof |
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| CN101083628A (en) * | 2007-07-20 | 2007-12-05 | 中兴通讯股份有限公司 | Method for dynamic forwarding media source |
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| EP2529531A1 (en) * | 2010-01-27 | 2012-12-05 | Koninklijke KPN N.V. | Method, system and device for synchronization of media streams |
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| CN101001365A (en) * | 2007-01-19 | 2007-07-18 | 北京华纬讯电信技术有限公司 | Method for implementing media flow balance dispatching in vedio service |
| CN101083628A (en) * | 2007-07-20 | 2007-12-05 | 中兴通讯股份有限公司 | Method for dynamic forwarding media source |
| CN101242367A (en) * | 2008-03-07 | 2008-08-13 | 上海华平信息技术股份有限公司 | Method for selecting forward node end in media stream |
| EP2529531A1 (en) * | 2010-01-27 | 2012-12-05 | Koninklijke KPN N.V. | Method, system and device for synchronization of media streams |
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