CN100466598C - Method for realizing data message transmission based on RTP - Google Patents

Method for realizing data message transmission based on RTP Download PDF

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Publication number
CN100466598C
CN100466598C CNB2004100865027A CN200410086502A CN100466598C CN 100466598 C CN100466598 C CN 100466598C CN B2004100865027 A CNB2004100865027 A CN B2004100865027A CN 200410086502 A CN200410086502 A CN 200410086502A CN 100466598 C CN100466598 C CN 100466598C
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China
Prior art keywords
data message
rtp
port
transmission protocol
communications equipment
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Expired - Fee Related
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CNB2004100865027A
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Chinese (zh)
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CN1764153A (en
Inventor
马云
郭�东
陈诚
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/906—Fiber data distribution interface, FDDI
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching
    • Y10S370/903—Osi compliant network
    • Y10S370/907—Synchronous optical network, SONET

Abstract

The invention provides a realization method for data message transmission based on RTP, which comprises: the communication device determines random value according to received data message to determine transmission port for message; then, it sends the data message. This invention uses every port evenly, special makes good use of broadband resource of the logic ports, ensures the order transmission for RTP data message, and cuts network resource.

Description

A kind of implementation method of transmitting based on the data message of RTP
Technical field
The present invention relates to the network communications technology field, be specifically related to a kind of implementation method of transmitting based on the data message of RTP.
Background technology
In network communication system, the ethernet port of Fast Ethernet port that can be by 10/100M between two data communication apparatus and the GE port of 1000M carries out data communication.
When using a plurality of FE/GE ports to carry out communication between two data communication apparatus simultaneously, can become a logic port that bandwidth is bigger to a plurality of FE/GE Port BindingBundlings, as shown in Figure 1, with a plurality of FE/GE Port BindingBundlings between data communications equipment 1 and the data communications equipment 2 is a logic port, carries out communication by this logic port between data communications equipment 1 and the data communications equipment 2.
When using a logic port to carry out communication, can effectively save the IP address resource only for this IP address of logic port configuration and MAC Address; When one or more FE/GE port in being tied to logic port breaks down, can use other FE/GE port communication, not need independent FE/GE backup port; And an independent FE/GE port its bandwidth utilization rate in the normal communication process generally can not surpass 95%, and a plurality of Port BindingBundlings are when being a logic port, logic port its bandwidth utilization rate in the normal communication process is no more than the 95% just passable of total bandwidth, has effectively improved bandwidth utilization.
Logic port after the binding is deferred to the IEEE802.3ad agreement, stipulates in the agreement, and same session message is required the assurance order, and promptly same session message can only send on the same physical port in logic port.When the session message being transmitted by logic port, can identify a session by the port numbers of the MAC Address in the IP message, IP address, IP message, calculate a physical port according to these signs then, the message of all these sessions all passes through this physical port and sends.
When two witched-capacity network equipment carry out communication as the media gateway of two NGN (next generation network), the initiation point of session and destination node all are these two gateways, because the IP message between these two gateways has only a spot of MAC Address, the IP address, and the port numbers limited amount of IP message, allocation rule is fixed, so, use MAC Address, IP address or port numbers identify session, a large amount of IP messages can only be sent on certain several fixing physical port, make the physical port in the logic port use inhomogeneous, thereby bandwidth resources can not be made full use of, reduced the utilization rate of bandwidth, cause the bandwidth resources waste, do not reach the purpose that the binding Ethernet interface is saved bandwidth.
Summary of the invention
The objective of the invention is to, a kind of implementation method of transmitting based on the data message of RTP is provided, the port of determining according to the random value of data message loaded information correspondence transmits the data message, and the port of data communications equipment is evenly used, and has saved network bandwidth resources.
For achieving the above object, a kind of implementation method of transmitting based on the data message of RTP provided by the invention comprises:
A, data communications equipment are determined random value according to what receive based on loaded information in the data message of realtime transmission protocol RTP;
B, according to the port of described random value specified data message transmissions;
C, according to the described data message of described definite port transmission.
Described data communications equipment is: based on the data communications equipment of Ethernet interface.
Described data message transmit port comprises: the physical port in the logic port.
Describedly comprise: the timestamp information of RTP layer based on loaded information in the data message of RTP.
Described step a further comprises:
Data communications equipment obtains the timestamp information based on the RTP layer of the data message of RTP carrying of its reception;
The packaging time length of RTP data message is determined the random value of described timestamp information correspondence according to described data communications equipment.
Described random value is: random time stabs initial value or timestamp information is the remainder of divisor with described packaging time length.
Described step b is specially:
Hash operation value specified data message transmissions port according to described random value.
Described step b is specially:
Determine the Hash operation value of described random value;
Determine that described Hash operation value is the remainder of divisor with the port number of described data communications equipment;
Transmit port according to described remainder specified data message.
Described method also comprises:
Described data communications equipment transmits successively according to the data message based on RTP that its port order will receive.
Described method also comprises:
Described data communications equipment transmits successively according to the data message based on RTCP Real-time Transport Control Protocol that its port order will receive.
Description by technique scheme can obviously be learnt, the present invention utilizes in the RTP data message loaded information to determine random value, physical port by random value specified data message transmissions, the random value of the timestamp information correspondence in utilizing RTP layer information, as according to timestamp initial value or timestamp information with as described in packaging time length be that the remainder of divisor comes the physical port of specified data message transmissions, each physical port in the data communications equipment is evenly used, when especially the logic port that uses a plurality of physical port bindings to become at data communications equipment carries out transfer of data, each physical port in the logic port is evenly used, network bandwidth resources is fully used; Because timestamp initial value or above-mentioned remainder that the timestamp numerical value of each RTP data message of same speech business is corresponding identical, the present invention can be transmitted the RTP data message in the same speech business simply and easily by same physical port, effectively guaranteed the orderly transmission of RTP data message; The present invention directly evenly takes turns flow transmission with the RTP data message on a plurality of physical ports can make the RTP data message obtain basic transmission in order; The present invention can directly evenly take turns flow transmission with non-RTP data message on a plurality of physical ports; Thereby the utilization rate of the network bandwidth, the purpose of conserve network bandwidth resource have been realized improving by technical scheme provided by the invention.
Description of drawings
Fig. 1 is a FE/GE interface binding schematic diagram;
Fig. 2 is a RTP layer form schematic diagram;
Fig. 3 is data message transfer process figure of the present invention.
Embodiment
Core of the present invention is: data communications equipment is determined random value according to what receive based on loaded information in the data message of realtime transmission protocol RTP, according to the port of described random value specified data message transmissions, according to the described data message of described definite port transmission.
Based on core concept of the present invention technical scheme provided by the invention is further described below.
Data communications equipment in the Ethernet is in the transmission of the logic port by by a plurality of FE/GE Port BindingBundlings being during based on the speech business of RTP, can determine physical port in the logic port of data message of this speech business of transmission according to the RTP layer information of carrying in the data message.
With the timestamp information in the RTP layer information of data message carrying is example, and the physical port process of determining to be tied to the data message transmission in the logic port is described.
For speech business, as shown in table 1 based on the form of RTP data message:
Table 1
The MAC layer The IP layer The UDP layer The RTP layer The voice bearer data
Wherein, the length of MAC layer information is that the length of 14 bytes, IP layer information is that the length of 20 bytes, UDP layer information is 8 bytes, and the form of RTP layer information as shown in Figure 2.
In Fig. 2, begin to be timestamp (Timestamp) field that from the 5th byte of RTP layer information the length of timestamp field is 4 bytes.
Data communications equipment of the present invention is after receiving the RTP data message, directly skip MAC layer information, IP layer information, the UDP layer information of carrying in the data message, begin to read the timestamp information of 32bit from the 5th byte of RTP layer information, promptly begin to read the timestamp information of 32bit from the 47th byte of RTP data message.Then, determine random value, as timestamp initial value or the random value definite according to the packaging time length of timestamp information, RTP data message according to the packaging time length of the timestamp information that reads, voice conversation.
Timestamp information in first RTP data message of voice conversation produces at random, be called the timestamp initial value, the timestamp numerical value in the RTP data message such as follow-up second, the 3rd of same voice conversation clocklike increases on the basis of timestamp initial value successively according to the sampled point of the packaging time length that session requires.
Generally speaking, the sampled point of voice conversation be a second packaging time length of 8000 sampled points, voice conversation be the multiple of 5ms, as 5ms G.711, G.711 10ms, G.711 20ms, G.729 20ms, 30ms etc. G.723.Like this, 5ms corresponding sampling points number is 40, both every 5ms, and the time stamp data in the follow-up RTP data message of same voice conversation should increase by 40 on the basis of its time corresponding stamp initial value.The timestamp initial value that produces at random as first RTP data message of session is 100, the packaging time length of voice conversation is 10ms, timestamp in second RTP data message of so same session is that 180, the 3rd timestamps in the RTP data message are 260, and the rest may be inferred for the timestamp numerical value in the follow-up RTP data message of same session.
Because the timestamp initial value produces at random, so come the physical port of specified data message transmissions according to the timestamp initial value, each physical port that is tied in the logic port is used uniformly, thereby improved utilization of network bandwidth.
It is identical stabbing initial value for its time corresponding of RTP data message of same voice conversation, therefore, the RTP data message of same voice conversation is determined physical port according to its timestamp initial value, can make the RTP data message of same voice conversation effectively guarantee the orderly transmission of the RTP data message of same voice conversation from same physical port transmission.
Setting-up time stamp information is that the packaging time length of S, voice conversation is 5ms, then the method for the random value of determining according to the packaging time length of timestamp information, RTP data message can for: S is the remainder of divisor with 40.
Equally, because the timestamp initial value produces at random, the remainder that utilizes timestamp information, packaging time length to determine also is at random, and the corresponding identical remainder of the timestamp information of the RTP data message of same voice conversation, so, determine the transmit port of RTP data message each physical port that is tied in the logic port to be used uniformly according to this remainder, improve utilization of network bandwidth, effectively guaranteed the orderly transmission of the RTP data message of same voice conversation.
The method of determining to be tied to the physical port of data message transmission in the logic port according to random value can realize by hash function, the physical port number that is tied to a logic port in the setting data communication apparatus is N, hash function is H (), the timestamp value of carrying in the RTP data message is S, the packaging time length of voice conversation is 5ms, be example with above-mentioned remming, the physical port P that transmits this RTP data message is:
P＝H(S％40)％N；
Wherein: the 40th, the remainder, H (S%40) that 5ms corresponding sampling points number, S%40 obtain this RTP data message correspondence is for being that parameter is done Hash operation with this remainder, hash function can be chosen arbitrarily, and H (S%40) %N obtains transmitting the physical port of this RTP data message.
Because the packaging time length of voice conversation is the multiple of 5ms, be generally 20ms, just every 20ms just produces a RTP data message, so, data communications equipment is directly in proper order evenly taken turns flow transmission with its RTP data message that receives in order on a plurality of physical ports, the RTP data message that receives at receiving terminal also is orderly basically, receiving terminal is done suitable out of order adjustment to a small amount of unordered message that receives, can recover the order of RTP data message, utilize such transmission method that the network bandwidth is efficiently utilized.
For the non-RTP data message that transmits between the data communications equipment, as data message based on RTCP (RTCP Real-time Transport Control Protocol), can adopt the method for directly on a plurality of physical ports, evenly taking turns flow transmission that the RTCP message is carried out the data message transmission, efficiently be utilized to guarantee network bandwidth.
Further specify below in conjunction with 3 pairs of RTP data message transmission methods of the present invention of accompanying drawing.
In Fig. 3, step 300, the data communications equipment receiving data packets, this data message need be by being tied to a physical port transmission in the logic port.
To step 310, the data message that data communications equipment is distinguished its reception by VLAN (VLAN), VPN (Virtual Private Network), Qos technology such as (service quality) is the RTP data message, right and wrong RTP data message also, if the data message right and wrong RTP data message that data communications equipment receives, to step 311, this non-RTP data message is directly evenly taken turns flow transmission on a plurality of physical ports.
In step 310,,, begin to read the timestamp information of 32bit from the 47th byte of this RTP data message to step 320 if the data message that data communications equipment receives is the RTP data message.
To step 330, determine this timestamp information time corresponding stamp initial value or determine remainder according to timestamp information, packaging time length according to the packaging time length of voice conversation.
To step 340, the timestamp initial value or the remainder of above-mentioned acquisition are made Hash operation, and determine the physical port of this RTP data message of transmission.
To step 350, this RTP data message is transmitted by above-mentioned definite physical port.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wishes that appended claim comprises these distortion and variation.

Claims (7)

1, a kind of implementation method of transmitting based on the data message of realtime transmission protocol RTP is characterized in that comprising:
A, data communications equipment are determined random value according to what receive based on loaded information in the data message of realtime transmission protocol RTP, and described information comprises: the timestamp information of realtime transmission protocol RTP layer;
B, according to the port of described random value specified data message transmissions, described data message transmit port comprises the physical port in the logic port;
C, transmit described data message according to described definite physical port.
2, a kind of implementation method of transmitting based on the data message of realtime transmission protocol RTP as claimed in claim 1 is characterized in that described data communications equipment is: based on the data communications equipment of Ethernet interface.
3, a kind of implementation method of transmitting based on the data message of realtime transmission protocol RTP as claimed in claim 1 is characterized in that described step a further comprises:
Data communications equipment obtains the timestamp information based on the realtime transmission protocol RTP layer of the data message of realtime transmission protocol RTP carrying of its reception;
The packaging time length of realtime transmission protocol RTP data message is determined the random value of described timestamp information correspondence according to described data communications equipment.
4, the implementation method of a kind of data message transmission based on realtime transmission protocol RTP as claimed in claim 1 is characterized in that described random value is: timestamp information is the remainder of divisor with described data communications equipment to the packaging time length of realtime transmission protocol RTP data message.
5, as claim 1 or 2 or 3 or 4 described a kind of implementation methods of transmitting based on the data message of realtime transmission protocol RTP, it is characterized in that described step b is specially:
Port according to the Hash operation value specified data message transmissions of described random value.
6, a kind of implementation method of transmitting based on the data message of realtime transmission protocol RTP as claimed in claim 5 is characterized in that described step b is specially:
Determine the Hash operation value of described random value;
Determine that described Hash operation value is the remainder of divisor with the physical port number of described data communications equipment;
Physical port according to described remainder specified data message transmissions.
7, a kind of implementation method of transmitting based on the data message of realtime transmission protocol RTP as claimed in claim 1 is characterized in that described method also comprises:
Described data communications equipment transmits successively according to the data message based on RTCP Real-time Transport Control Protocol that its physical port order will receive.
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CN111917656B (en) * 2017-07-27 2023-11-07 超聚变数字技术有限公司 Method and device for transmitting data
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