CN102638392B - Data transmission method, data transmission equipment and data transmission system - Google Patents
Data transmission method, data transmission equipment and data transmission system Download PDFInfo
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Abstract
The invention provides a data transmission method, data transmission equipment and a data transmission system. Transmitting-end equipment transmits M SCTP (stream control transmission protocol) reports to receiving-end equipment, each of the M SCTP reports carries the value of transmission times to lead the receiving-end equipment to obtain the total number M of the SCTP reports by computation according to the value of the transmission times carried in the received N SCTP reports, so that the problem of unnecessary repeated retransmission of lost data blocks due to incapability of accurately knowing transmission quality of a transmission network in the prior art can be avoided to a certain degree, and further, network bandwidth and performance expenditure are reduced, and network resources are saved.
Description
Technical field
The present invention relates to data transmission technology, particularly relate to data transmission method and equipment, system.
Background technology
SCTP (Stream Control Transmission Protocol is called for short SCTP) by setting up coupling, for providing reliable transmission between two SCTP endpoint between two SCTP endpoint.In order to solve the unreliable and problem of loss of data that exists of transmission, prior art have employed fast retransmission mechanism, for a data message, if the selection not receiving opposite end confirms (SelectiveAcknowledgment, be called for short SACK) response, then determine that opposite end does not receive this data message, this data message need be resend.
But, because the reason causing transmit leg to resend data message has a lot, such as: the data message mistake that the data message that the unreliability of Internet Transmission causes is lost, transmission link error code causes; And the reason causing recipient to receive the data message of repetition also has multiple, such as: the data message etc. that the data message that transmit leg resends, network copy produce, make above-mentioned fast retransmission mechanism of the prior art, accurately cannot know the transmission quality of transmission network, unnecessary Fast retransmission may be caused to be filled with unnecessary load to network, add the network bandwidth and performance cost, thus cause the waste of Internet resources.
Summary of the invention
The embodiment of the present invention provides data transmission method and equipment, system, by calculating the SCTP packet number that sending ending equipment sends in network, so that comparatively accurately know the transmission quality of transmission network.
Provide a kind of data transmission method on the one hand, comprising:
Sending ending equipment sends M SCTP packet to receiving device, all carry transfer times value in a described M SCTP packet, calculate the SCTP packet sum M of described sending ending equipment transmission to make described receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
N number of select corresponding to described N number of SCTP packet that described sending ending equipment receives the transmission of described receiving device confirms to respond, and described N number of selection confirms that response sends after receiving described N number of SCTP packet by described receiving device;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
Provide a kind of data transmission method on the other hand, comprising:
N number of SCTP packet that receiving device receiving end/sending end equipment sends, all carries transfer times value in described N number of SCTP packet;
Described receiving device sends N number of select corresponding with described N number of SCTP packet to described sending ending equipment and confirms to respond; And
Described receiving device calculates the SCTP packet sum M of described sending ending equipment transmission according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
Provide a kind of sending ending equipment on the other hand, comprising:
Transmitting element, for sending M SCTP packet to receiving device, all carry transfer times value in a described M SCTP packet, calculate the SCTP packet sum M of described sending ending equipment transmission to make described receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
Receiving element, N number of select corresponding to described N number of SCTP packet sent for receiving described receiving device confirms to respond, and described N number of selection confirms that response sends after receiving described N number of SCTP packet by described receiving device;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
Provide a kind of receiving device on the other hand, comprising:
Receiving element, for N number of SCTP packet that receiving end/sending end equipment sends, all carries transfer times value in described N number of SCTP packet;
Transmitting element, confirms to respond for sending N number of selection the corresponding with described N number of SCTP packet to described sending ending equipment;
Computing unit, for calculating the SCTP packet sum M that described sending ending equipment sends according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
Provide a kind of data transmission system on the other hand, comprise sending ending equipment and receiving device, transmission SCTP SCTP packet Network Based between described sending ending equipment and described receiving device, wherein:
Described sending ending equipment, for sending M SCTP packet to described receiving device, all carries transfer times value in a described M SCTP packet; And receive N number of select corresponding to described N number of SCTP packet sent after described receiving device receives N number of SCTP packet and confirm to respond;
Described receiving device, for receiving N number of SCTP packet that described sending ending equipment sends, all carries transfer times value in described N number of SCTP packet; And confirm to respond to described sending ending equipment transmission N number of selection the corresponding with described N number of SCTP packet; And the SCTP packet sum M of described sending ending equipment transmission is calculated according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
As shown from the above technical solution, the embodiment of the present invention sends M SCTP SCTP packet by sending ending equipment to receiving device, all carry transfer times value in a described M SCTP packet, calculate the SCTP packet sum M of described sending ending equipment transmission to make described receiving device according to the transfer times value of carrying in the N number of SCTP packet received; Due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively distinguish the factor affecting the transmission quality of transmission network, thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of SCTP present position in the signalling standard of Internet Engineering Task group (The Internet Engineering Task Force is called for short IETF);
The schematic flow sheet of the data transmission method that Fig. 2 provides for one embodiment of the invention;
The schematic flow sheet of the data transmission method that Fig. 3 provides for another embodiment of the present invention;
Fig. 4 is the field schematic diagram based on the data block of SCTP in the embodiment that Fig. 2 and Fig. 3 is corresponding;
The schematic flow sheet of the data transmission method that Fig. 5 provides for another embodiment of the present invention;
The structural representation of the sending ending equipment that Fig. 6 provides for another embodiment of the present invention;
The structural representation of the receiving device that Fig. 7 provides for another embodiment of the present invention;
The structural representation of the data transmission system that Fig. 8 provides for another embodiment of the present invention;
The structural representation of the data transmission system that Fig. 9 provides for another embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
To facilitate understanding of the present embodiment of the invention, first introduce during the embodiment of the present invention describes at this several key elements that can introduce.
SCTP (Stream Control Transmission Protocol, be called for short SCTP): SCTP is signalling (Signal Transport, SIGTRAN) one in agreement, its objective is that realization realizes reliable messaging in an ip network.
In the signalling standard of Internet Engineering Task group (The Internet Engineering Task Force is called for short IETF), SCTP present position, as shown in Figure 1.Wherein, MTP third level user adaptation layer (MTP level 3 User Adaptation Layer, M3UA)/MTP second level user adaptation layer (MTP level 2User Adaptation Layer, M2UA)/SCCP User Part adaptation layer (SCCP User Adaptation Layer, SUA)/ISDN User Part adaptation layer (ISDN UserAdaptation Layer, I UA)/V5 User Part adaptation layer (V5User Adaptation Layer, V5UA) refer to use Stream Control Transmission Protocol transmission data upper-layer protocol.
SCTP be based on IP on transport layer protocol, externally provide connection-oriented, based on bag, reliable message bag transmission service, ensure message in order, transmitting.
Stream Control Transmission Protocol is applied in communication network widely, at radio network controller (RadioNetwork Controller, RNC), Universal Media Gateway (Universal Media Gateway, UMG), mobile switching centre (Mobile Switching Center, MSC), service universal grouping wireless service (General Packet Radio Service, GPRS) support node (Serving GPRSSupporting Node, SGSN), attaching position register (Home Location Register, etc. HLR) application is all had in network element, be mainly used in carrier signaling message.
The schematic flow sheet of the data transmission method that Fig. 2 provides for one embodiment of the invention, as shown in Figure 2, the data transmission method of the present embodiment can comprise:
201, sending ending equipment sends M SCTP packet to receiving device, all carry transfer times value in an above-mentioned M SCTP packet, calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission to make above-mentioned receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
202, above-mentioned sending ending equipment receives N number of selects corresponding to above-mentioned N number of SCTP packet that above-mentioned receiving device sends and confirms to respond, and above-mentioned N number of selection confirmation sends after responding and receiving above-mentioned N number of SCTP packet by above-mentioned receiving device.
Wherein, in M the SCTP packet that above-mentioned sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in above-mentioned (M-N) individual SCTP packet, and in the SCTP packet of above-mentioned re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
In an Alternate embodiments of the present embodiment, which time transmission is described transfer times value be for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 1, represent that described SCTP packet is first time transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.
In another Alternate embodiments of the present embodiment, described transfer times value is which time retransmits for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 0, represent that described SCTP packet retransmits for the 0th time, i.e. the 1st transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.
Be understandable that: SCTP packet can also be referred to as the data block (SCTPdata chunk) based on SCTP.In an Alternate embodiments of the present embodiment, can utilize and carry transfer times value (Transmit count) based on the existing field in the data block (SCTP data chunk) of SCTP, such as: as shown in Figure 4, reservation (Reserved) field is utilized to carry transfer times value, or can also expand and carry transfer times value based on the newer field in the data block of SCTP, the present embodiment does not limit this.
Visible, in the present embodiment, M SCTP packet is sent to receiving device by sending ending equipment, all transfer times value is carried in an above-mentioned M SCTP packet, make above-mentioned receiving device can calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission according to the transfer times value of carrying in the N number of SCTP packet received, due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively distinguish the factor affecting the transmission quality of transmission network, thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
The schematic flow sheet of the data transmission method that Fig. 3 provides for another embodiment of the present invention, as shown in Figure 3, the data transmission method of the present embodiment can comprise:
301, N number of SCTP packet of receiving device receiving end/sending end equipment transmission, all carries transfer times value in above-mentioned N number of SCTP packet;
302, above-mentioned receiving device confirms to respond to above-mentioned sending ending equipment transmission N number of selection the corresponding with above-mentioned N number of SCTP packet; And
303, above-mentioned receiving device calculates the SCTP packet sum M of above-mentioned sending ending equipment transmission according to the transfer times value of carrying in above-mentioned N number of SCTP packet.
Wherein, in M the SCTP packet that above-mentioned sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in above-mentioned (M-N) individual SCTP packet, and in the SCTP packet of above-mentioned re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
In an Alternate embodiments of the present embodiment, which time transmission is described transfer times value be for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 1, represent that described SCTP packet is first time transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, the transfer times value of carrying in step 303 can be specifically, above-mentioned receiving device adds up above-mentioned N number of SCTP packet, obtains the SCTP packet sum M that above-mentioned sending ending equipment sends;
In another Alternate embodiments of the present embodiment, described transfer times value is which time retransmits for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 0, represent that described SCTP packet retransmits for the 0th time, i.e. the 1st transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, after step 303 can be specifically, above-mentioned receiving device adds a process respectively to the transfer times value of carrying in above-mentioned N number of SCTP packet, again the transfer times value of carrying in the N number of SCTP packet after adding a process is added up, obtain the SCTP packet sum M that above-mentioned sending ending equipment sends.
Be understandable that: SCTP packet can also be referred to as the data block (SCTPdata chunk) based on SCTP.In an Alternate embodiments of the present embodiment, can utilize and carry transfer times value (Transmit count) based on the existing field in the data block (SCTP data chunk) of SCTP, such as: as shown in Figure 4, reservation (Reserved) field is utilized to carry transfer times value, or can also expand and carry transfer times value based on the newer field in the data block of SCTP, the present embodiment does not limit this.
In an Alternate embodiments of the present embodiment, above-mentioned receiving device can also be further used for: the check value calculating above-mentioned N number of SCTP packet, and calculates the error rate, and the above-mentioned error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that above-mentioned sending ending equipment sends.
In another Alternate embodiments of the present embodiment, above-mentioned receiving device can also be further used for: calculate packet loss, and above-mentioned packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that above-mentioned receiving device receives, M represent the SCTP packet sum that above-mentioned sending ending equipment sends.
Further, at least one parameter in the error rate that the present embodiment can also calculate according to receiving device further and packet loss, carries out corresponding network operation and maintenance, in order to effectively to promote the transmission quality of transmission network.
In another Alternate embodiments of the present embodiment, identical transfer times value is carried and identical transmission sequence number (Transmission Sequence Number when above-mentioned receiving device receives, during at least two SCTP packet TSN), then can determine that above-mentioned SCTP packet is copied by network node (as router).Such as: after receiving SCTP packet, the transfer times value comprised in this SCTP packet can be checked, for same data block (namely TSN is equal), if above-mentioned transfer times value is equal, then the anomaly occurring network node (as router) random reproduction data block is described.
Visible, in the present embodiment, by N number of SCTP packet that receiving device receiving end/sending end equipment sends, all transfer times value is carried in above-mentioned N number of SCTP packet, make above-mentioned receiving device can calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission according to the transfer times value of carrying in the N number of SCTP packet received, due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively to distinguish the factor affecting the transmission quality of transmission network and (such as effectively distinguish wrong bag, packet loss, router duplication bag etc. affects the factor of the transmission quality of transmission network), thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
The method provided for making the embodiment of the present invention clearly, below will with M=6, N=4 as an example, and wherein Transmit count represents transfer times value.
As shown in Figure 5, sending ending equipment sends 4 SCTP packet to receiving device, i.e. Data 1 (Transmit count=1), Data 2 (Transmit count=1), Data 3 (Transmitcount=1) and Data 4 (Transmit count=1).When receiving device receives SCTP packet, SACK response will be responded, as the Data 1 (Transmit count=1) in Fig. 5 and Data 2 (Transmit count=1) to sending ending equipment; Because the transmission of IP network is unreliable, SCTP packet may be lost in a network, now, on transmitting terminal, equipment does not receive the corresponding SACK response that receiving device is responded within the time preset, then to resend these SCTP packet, until receive the corresponding SACK response of receiving device response, as the Data 3 (Transmit count=1) in Fig. 5 and Data 4 (Transmit count=1).
Then, sending ending equipment needs to resend 2 SCTP packet to receiving device, the Transmit count of above-mentioned 2 SCTP packet resend increases by 1, i.e. Data 3 (Transmitcount=2) and Data 4 (Transmit count=2).When receiving device receives SCTP packet, SACK response will be responded, as the Data 3 (Transmit count=2) in Fig. 5 and Data 4 (Transmit count=2) to sending ending equipment.
So far, receiving device can according to 4 SCTP packet received, i.e. Data 1 (Transmitcount=1) and Data 2 (Transmit count=1), and Data 3 (Transmit count=2) and Data 4 (Transmit count=2), in Transmit count, the SCTP packet calculating sending ending equipment transmission adds up to 6, the i.e. first Data 1 (Transmit count=1) sent, Data 2 (Transmit count=1), Data 3 (Transmit count=1) and Data 4 (Transmitcount=1), the Data 3 (Transmit count=2) resend and Data 4 (Transmitcount=2).
It should be noted that: for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
The structural representation of the sending ending equipment that Fig. 6 provides for another embodiment of the present invention, as shown in Figure 6, the sending ending equipment of the present embodiment can comprise transmitting element 61 and receiving element 62.
Wherein, transmitting element 61 is for sending M SCTP packet to receiving device, all carry transfer times value in an above-mentioned M SCTP packet, calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission to make above-mentioned receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
Receiving element 62 confirms to respond for N number of selection the corresponding to above-mentioned N number of SCTP packet receiving the transmission of above-mentioned receiving device, and above-mentioned N number of selection confirms that response sends after receiving above-mentioned N number of SCTP packet by above-mentioned receiving device.
Wherein, wherein, in M the SCTP packet that above-mentioned sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in above-mentioned (M-N) individual SCTP packet, and in the SCTP packet of above-mentioned re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
In an Alternate embodiments of the present embodiment, which time transmission is described transfer times value be for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 1, represent that described SCTP packet is first time transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.
In another Alternate embodiments of the present embodiment, described transfer times value is which time retransmits for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 0, represent that described SCTP packet retransmits for the 0th time, i.e. the 1st transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.
Be understandable that: SCTP packet can also be referred to as the data block (SCTPdata chunk) based on SCTP, describe in detail see the related content in embodiment corresponding to Fig. 2, can repeat no more herein.
In the present embodiment, sending ending equipment sends M SCTP packet by transmitting element to receiving device, all transfer times value is carried in an above-mentioned M SCTP packet, make above-mentioned receiving device can calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission according to the transfer times value of carrying in the N number of SCTP packet received, due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively distinguish the factor affecting the transmission quality of transmission network, thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
The structural representation of the receiving device that Fig. 7 provides for another embodiment of the present invention, as shown in Figure 7, the receiving device of the present embodiment can comprise receiving element 71, transmitting element 72 and computing unit 73.
Wherein, N number of SCTP packet that receiving element 71 sends for receiving end/sending end equipment, all carries transfer times value in above-mentioned N number of SCTP packet;
Transmitting element 72 confirms to respond for sending N number of selection the corresponding with above-mentioned N number of SCTP packet to above-mentioned sending ending equipment;
The SCTP packet sum M that computing unit 73 sends for calculating above-mentioned sending ending equipment according to the transfer times value of carrying in above-mentioned N number of SCTP packet.
Wherein, in M the SCTP packet that above-mentioned sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in above-mentioned (M-N) individual SCTP packet, and in the SCTP packet of above-mentioned re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
In an Alternate embodiments of the present embodiment, which time transmission is described transfer times value be for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 1, represent that described SCTP packet is first time transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, computing unit 73, specifically for the transfer times value of carrying in cumulative above-mentioned N number of SCTP packet, obtains the SCTP packet sum M that above-mentioned sending ending equipment sends;
In another Alternate embodiments of the present embodiment, described transfer times value is which time retransmits for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 0, represent that described SCTP packet retransmits for the 0th time, i.e. the 1st transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, computing unit 73 is specifically for after adding a process respectively to the transfer times value of carrying in above-mentioned N number of SCTP packet, again the transfer times value of carrying in the N number of SCTP packet after adding a process is added up, obtain the SCTP packet sum M that above-mentioned sending ending equipment sends.
Be understandable that: SCTP packet can also be referred to as the data block (SCTPdata chunk) based on SCTP, describe in detail see the related content in embodiment corresponding to Fig. 3, can repeat no more herein.
In an Alternate embodiments of the present embodiment, computing unit 73 can also be further used for the check value calculating above-mentioned N number of SCTP packet, and calculates the error rate, and the above-mentioned error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that above-mentioned sending ending equipment sends.
In another Alternate embodiments of the present embodiment, computing unit 73 can also be further used for calculating packet loss, and above-mentioned packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that above-mentioned receiving device receives, M represent the SCTP packet sum that above-mentioned sending ending equipment sends.
Further, can further include in the present embodiment: O&M unit (not shown) is used at least one parameter in the error rate that calculates according to computing unit 73 and packet loss, carry out corresponding network operation and maintenance, in order to effectively to promote the transmission quality of transmission network.
In another Alternate embodiments of the present embodiment, identical transfer times value is carried and identical transmission sequence number (Transmission Sequence Number when receiving element 71 receives, be called for short TSN) at least two SCTP packet time, computing unit 73 can determine that above-mentioned SCTP packet is copied by network node (as router).Such as: after receiving element 71 receives SCTP packet, computing unit 73 can check the transfer times value comprised in this SCTP packet, for same data block (namely TSN is equal), if above-mentioned transfer times value is equal, then the anomaly occurring network node random reproduction data block is described.
In the present embodiment, N number of SCTP packet that receiving device is sent by receiving element receiving end/sending end equipment, all transfer times value is carried in above-mentioned N number of SCTP packet, the transfer times value of carrying in N number of SCTP packet that computing unit can be received according to receiving element calculates the SCTP packet sum M that above-mentioned sending ending equipment sends, due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively distinguish the factor affecting the transmission quality of transmission network, thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
The structural representation of the data transmission system that Fig. 8 provides for another embodiment of the present invention, as shown in Figure 8, the data transmission system of the present embodiment can comprise sending ending equipment 81 and receiving device 82, transmission SCTP packet Network Based between above-mentioned sending ending equipment 81 and above-mentioned receiving device 82.Wherein,
Above-mentioned sending ending equipment 81, for sending M SCTP packet to above-mentioned receiving device 82, all carries transfer times value in an above-mentioned M SCTP packet; And receive N number of select corresponding to above-mentioned N number of SCTP packet sent after above-mentioned receiving device 82 receives N number of SCTP packet and confirm to respond;
Above-mentioned receiving device 82, for receiving N number of SCTP packet that above-mentioned sending ending equipment 81 sends, all carries transfer times value in above-mentioned N number of SCTP packet; And confirm to respond to above-mentioned sending ending equipment 81 transmission N number of selection the corresponding with above-mentioned N number of SCTP packet; And the SCTP packet sum M of above-mentioned sending ending equipment 81 transmission is calculated according to the transfer times value of carrying in above-mentioned N number of SCTP packet.
Wherein, in M the SCTP packet that above-mentioned sending ending equipment 81 sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in above-mentioned (M-N) individual SCTP packet, and in the SCTP packet of above-mentioned re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
In an Alternate embodiments of the present embodiment, which time transmission is described transfer times value be for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 1, represent that described SCTP packet is first time transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, N number of SCTP packet that above-mentioned receiving device 82 sends specifically for receiving above-mentioned sending ending equipment 81, all carries transfer times value in above-mentioned N number of SCTP packet; And confirm to respond to above-mentioned sending ending equipment 81 transmission N number of selection the corresponding with above-mentioned N number of SCTP packet; And the transfer times value of carrying in cumulative above-mentioned N number of SCTP packet, obtain the SCTP packet sum M that above-mentioned sending ending equipment sends;
In another Alternate embodiments of the present embodiment, described transfer times value is which time retransmits for marking described SCTP packet, the initial value of above-mentioned transfer times value can be set to 0, represent that described SCTP packet retransmits for the 0th time, i.e. the 1st transmission, sending ending equipment resends a SCTP packet at every turn, and the transfer times value of this SCTP packet then increases by 1.Accordingly, N number of SCTP packet that above-mentioned receiving device 82 sends specifically for receiving above-mentioned sending ending equipment 81, all carries transfer times value in above-mentioned N number of SCTP packet; And confirm to respond to above-mentioned sending ending equipment 81 transmission N number of selection the corresponding with above-mentioned N number of SCTP packet; And after a process is added respectively to the transfer times value of carrying in above-mentioned N number of SCTP packet, then the transfer times value of carrying in the N number of SCTP packet after adding a process is added up, obtain the SCTP packet sum M that above-mentioned sending ending equipment sends.
Be understandable that: SCTP packet can also be referred to as the data block (SCTPdata chunk) based on SCTP, describe in detail see the related content in embodiment corresponding to Fig. 3 and Fig. 4, can repeat no more herein.
In an Alternate embodiments of the present embodiment, receiving device 82 can also be further used for the check value calculating above-mentioned N number of SCTP packet, and calculates the error rate, and the above-mentioned error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that above-mentioned sending ending equipment 81 sends.
In another Alternate embodiments of the present embodiment, receiving device 82 can also be further used for calculating packet loss, and above-mentioned packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that above-mentioned receiving device 82 receives, M represent the SCTP packet sum that above-mentioned sending ending equipment 81 sends.
Further, the present embodiment can further include Network Management Equipment (not shown in the figures anticipate out), for according at least one parameter in the error rate and packet loss, carry out corresponding network operation and maintenance, in order to effectively to promote the transmission quality of transmission network.
In another Alternate embodiments of the present embodiment, as shown in Figure 9, the data transmission system that the present embodiment provides can further include network node 91 (as router), for copy and to receiving device 82 send sending ending equipment 81 send SCTP packet; Correspondingly, receiving device 82 can also further when receive carry identical transfer times value and at least two SCTP packet of identical TSN time, determine that above-mentioned SCTP packet is copied by above-mentioned network node 91.
In the present embodiment, M SCTP packet is sent to receiving device by sending ending equipment, all transfer times value is carried in an above-mentioned M SCTP packet, make above-mentioned receiving device can calculate the SCTP packet sum M of above-mentioned sending ending equipment transmission according to the transfer times value of carrying in the N number of SCTP packet received, due to the message number that receiving terminal accurate count sending ending equipment sends, be convenient to effectively distinguish the factor affecting the transmission quality of transmission network, thus be convenient to the transmission quality comparatively accurately knowing transmission network, and then the problem can avoiding due to the data block of the transmission quality and the unnecessary repeatedly retransmission of lost caused that accurately cannot know transmission network in prior art, thus reduce the network bandwidth and performance cost, save Internet resources.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of equipment and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, equipment and method, can realize by another way.Such as, apparatus embodiments described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, be called for short ROM), random access memory (Random Access Memory, be called for short RAM), magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a data transmission method, is characterized in that, comprising:
Sending ending equipment sends M SCTP SCTP packet to receiving device, all carry transfer times value in a described M SCTP packet, calculate the SCTP packet sum M of described sending ending equipment transmission to make described receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
N number of select corresponding to described N number of SCTP packet that described sending ending equipment receives the transmission of described receiving device confirms to respond, and described N number of selection confirms that response sends after receiving described N number of SCTP packet by described receiving device;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
2. method according to claim 1, is characterized in that, carries described transfer times value in the reserved field of described SCTP packet.
3. a data transmission method, is characterized in that, comprising:
N number of SCTP SCTP packet that receiving device receiving end/sending end equipment sends, all carries transfer times value in described N number of SCTP packet;
Described receiving device sends N number of select corresponding with described N number of SCTP packet to described sending ending equipment and confirms to respond; And
Described receiving device calculates the SCTP packet sum M of described sending ending equipment transmission according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
4. method according to claim 3, is characterized in that, described method also comprises:
Described receiving device calculates the check value of described N number of SCTP packet, and calculates the error rate, and the described error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that described sending ending equipment sends.
5. the method according to claim 3 or 4, is characterized in that, described method also comprises:
Described receiving device calculates packet loss, and described packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that described receiving device receives, M represent the SCTP packet sum that described sending ending equipment sends.
6. the method according to claim 3 or 4, is characterized in that, described method also comprises:
When described receiving device receive carry identical transfer times value and at least two SCTP packet of identical transmission sequence number TSN time, determine that described SCTP packet is copied by network node.
7. a sending ending equipment, is characterized in that, comprising:
Transmitting element, for sending M SCTP SCTP packet to receiving device, all carry transfer times value in a described M SCTP packet, calculate the SCTP packet sum M of described sending ending equipment transmission to make described receiving device according to the transfer times value of carrying in the N number of SCTP packet received;
Receiving element, N number of select corresponding to described N number of SCTP packet sent for receiving described receiving device confirms to respond, and described N number of selection confirms that response sends after receiving described N number of SCTP packet by described receiving device;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
8. a receiving device, is characterized in that, comprising:
Receiving element, for N number of SCTP SCTP packet that receiving end/sending end equipment sends, all carries transfer times value in described N number of SCTP packet;
Transmitting element, confirms to respond for sending N number of selection the corresponding with described N number of SCTP packet to described sending ending equipment;
Computing unit, for calculating the SCTP packet sum M that described sending ending equipment sends according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
9. receiving device according to claim 8, is characterized in that, described computing unit also for
Calculate the check value of described N number of SCTP packet, and calculate the error rate, the described error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that described sending ending equipment sends.
10. receiving device according to claim 8 or claim 9, is characterized in that, described computing unit also for
Calculate packet loss, described packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that described receiving device receives, M represent the SCTP packet sum that described sending ending equipment sends.
11. receiving devices according to claim 8 or claim 9, described computing unit also for
When described receiving element receive carry identical transfer times value and at least two SCTP packet of identical TSN time, determine that described SCTP packet is copied by network node.
12. 1 kinds of data transmission systems, is characterized in that, comprise sending ending equipment and receiving device, transmission SCTP SCTP packet Network Based between described sending ending equipment and described receiving device, wherein:
Described sending ending equipment, for sending M SCTP packet to described receiving device, all carries transfer times value in a described M SCTP packet; And receive N number of select corresponding to described N number of SCTP packet sent after described receiving device receives N number of SCTP packet and confirm to respond;
Described receiving device, for receiving N number of SCTP packet that described sending ending equipment sends, all carries transfer times value in described N number of SCTP packet; And confirm to respond to described sending ending equipment transmission N number of selection the corresponding with described N number of SCTP packet; And the SCTP packet sum M of described sending ending equipment transmission is calculated according to the transfer times value of carrying in described N number of SCTP packet;
Wherein, in M the SCTP packet that described sending ending equipment sends, (M-N) individual SCTP packet represents the SCTP packet of re-transmission, the transfer times value non-initial value of carrying in described (M-N) individual SCTP packet, and in the SCTP packet of described re-transmission, represent that the transfer times value of carrying in the SCTP packet of same message is increasing trend.
13. systems according to claim 12, is characterized in that, described receiving device also for:
Calculate the check value of described N number of SCTP packet, and calculate the error rate, the described error rate is the ratio of S and M; Wherein, S represents the SCTP packet number of check value mistake, and M represents the SCTP packet sum that described sending ending equipment sends.
14. systems according to claim 12 or 13, is characterized in that, described receiving device also for:
Calculate packet loss, described packet loss is 1-N/M; Wherein, N represents that the SCTP packet number that described receiving device receives, M represent the SCTP packet sum that described sending ending equipment sends.
15. systems according to claim 12 or 13, it is characterized in that, described system comprises network node further, for copying and sending to described receiving device the SCTP packet that described sending ending equipment sends;
Described receiving device also for: when receive carry identical transfer times value and at least two SCTP packet of identical TSN time, determine that described SCTP packet is copied by described network node.
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| CN105007238B (en) * | 2015-07-22 | 2018-04-24 | 中国船舶重工集团公司第七0九研究所 | The realization method and system of the cross-platform message-oriented middleware of lightweight |
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