CN102845022A - Transmission quality detection method, apparatus and transmission system thereof - Google Patents

Transmission quality detection method, apparatus and transmission system thereof Download PDF

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Publication number
CN102845022A
CN102845022A CN2011800002849A CN201180000284A CN102845022A CN 102845022 A CN102845022 A CN 102845022A CN 2011800002849 A CN2011800002849 A CN 2011800002849A CN 201180000284 A CN201180000284 A CN 201180000284A CN 102845022 A CN102845022 A CN 102845022A
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passback
transmission link
transmission
time
message
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CN102845022B (en
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段立
王兆峰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/43—Assembling or disassembling of packets, e.g. segmentation and reassembly [SAR]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a transmission quality detection method, an apparatus and a transmission system thereof. The transmission quality detection method includes the following steps: on a transmission link, receiving a first echo message which is transmitted by the opposite end and carries a first group of transmission quality parameters, wherein the first echo message is an echo reply or an echo request; obtaining the first group of transmission quality parameters and a second group of transmission quality parameters on the transmission link; according to the first group of transmission quality parameters and the second group of transmission quality parameters, computing to obtain transmission quality detection information corresponding to the transmission link. The technical solutions of the embodiments of the invention can obtain the transmission quality detection information of the multilink point-to-point link (MPlink) transmission link in the multiLink point to point (MLPPP), which makes up for the shortage of the transmission quality detection means of the MPlink transmission link in the prior art. With the technical solutions of the embodiments of the invention, the transmission quality detection information of the MPlink transmission link in the MLPPP can be obtained, thus the maintainability during the MLPPP transmission process and the transmission efficiency are improved.

Description

Transmission quality detection method, apparatus and transmission system thereof
Transmission quality detection method, device and Transmission system
Technical field
The present embodiments relate to communication technical field, more particularly to a kind of transmission quality detection method, device and Transmission system.Background technology
IP over E1/T1 technologies are provided based on traditional time division multiplexing（ Time Division Multiplexing;Hereinafter referred to as TDM) IP bearing technologies, generally using Multi-link Point to Point Protocol（ MultiLink Point to Point;Hereinafter referred to as MLPPP) improved by multi-channel bundling transmission in bandwidth and reliability.
Generally using a MLPPP group in MLPPP transmitting procedure（Group) realize the blunt text of talent from one end（Transmitting terminal can be referred to as）It is transferred to the other end（Receiving terminal can be referred to as）, the MLPPP Grou include a plurality of transmission link, and each bar transmission link can also be referred to as MPlink transmission links.MLPPP transmission basic procedure be：It is end-to-end to message progress burst sending, each burst is then sent to by receiving terminal by each MPlink transmission links in MLPPP Grou, then each burst recombinated in receiving terminal, message is generated.Due to the burst in MLPPP transmitting procedures and the presence of restructuring, the transmission quality of each bar MPlink transmission links of binding has a great impact to transmission performance in MLPPP Grou.The deterioration of the propagation delay time and Lost bag rates of such as individual other MPlink transmission links, all will cause the mortality of Packet reassembling significantly to be lifted.
In process of the present invention is realized, inventor has found that at least there are the following problems in the prior art：Lack the transmission quality detection means to MPlink transmission links in the prior art, cause maintainable poor in MLPPP transmitting procedures, efficiency of transmission is relatively low.The content of the invention
The embodiment of the present invention provides a kind of transmission quality detection method, equipment and system, existing to solve Have maintainable poor in MLPPP transmitting procedures in technology, there is provided the technical scheme that the transmission quality to MPlink transmission links is detected for the relatively low defect of efficiency of transmission.
One aspect of the present invention provides a kind of transmission quality detection method, including：
The the first passback message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link, the first passback message is passback response or passback request；
Obtain first group of transport quality parameters and the second group of transport quality parameters on the transmission link；
According to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link.
Another aspect of the present invention provides a kind of transmission quality detection means, including：
Receiving module, for receiving the first passback message for carrying first group of transport quality parameters that opposite end is sent on transmission link, the first passback message is passback response or passback request；Acquisition module, for obtaining first group of transport quality parameters and second group of transport quality parameters on the transmission link；
Processing module, for according to first group of transport quality parameters and second group of transport quality parameters, calculating to get the corresponding transmission quality detection information of the transmission link.
Another aspect of the present invention provides a kind of Transmission system, including two relative ends；
Wherein one end, for receiving the first passback message for carrying first group of transport quality parameters that the other end is sent on transmission link, the first passback message is passback response or passback request；Obtain first group of transport quality parameters and the second group of transport quality parameters on the transmission link；According to first group of transport quality parameters and second group of transport quality parameters, calculating gets the corresponding transmission quality detection information of the transmission link.
Using the technical scheme of the embodiment of the present invention, the transmission quality detection information of MLPPP MPlink transmission links can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission is improved. Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 show the blunt literary structural representations of middle Echo 4.
The flow chart for the kind transmission quality detection method that Fig. 2 provides for one embodiment of the invention.
The flow chart for the kind transmission quality detection method that Fig. 3 provides for another embodiment of the present invention.
The flow chart for the transmission quality detection method that Fig. 4 provides for yet another embodiment of the invention.
The flow chart for the transmission quality detection method that Fig. 5 provides for further embodiment of this invention.
The flow chart for the transmission quality detection method that Fig. 6 provides for another embodiment of the present invention.
The structural representation for the transmission quality detection means that Fig. 7 provides for one embodiment of the invention.
The structural representation for the transmission quality detection means that Fig. 8 provides for another embodiment of the present invention.The structural representation for the transmission quality detection means that Fig. 9 provides for yet another embodiment of the invention.The structural representation for the Transmission system that Figure 10 provides for one embodiment of the invention.Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, 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 a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Each MPLink transmission links in MLPPP Grou have to pass through LCP (Link Control Protocol when setting up;Hereinafter referred to as LCP) negotiations process, after only LCP consults successfully, the MPLink transmission links could add corresponding MLPPP Group. LCP is PPP (Point to Point;Hereinafter referred to as PPP) agreement provides a kind of LCP to configure the MPLink transmission links communicated with test data, and it can be used for consulting some configuration parameter options of ppp protocol；Handle different size of data frame；Detect MPLink transmission links loop, the mistake of some MPLink transmission links；Terminate a MPLink transmission link.After LCP consults successfully, the passback request that PPP two ends are periodically sent（Echo-request)/passback responds (Echo-Reply) message to carry out MPLink transmission link detection of connectivity.Echo-request messages and Echo-Reply messages can be referred to as the blunt texts of Echo.Fig. 1 show the structural representation of Echo messages.As shown in figure 1, Echo messages include：Type of message（Code), sequence number（Identifier), the length (Length) of message, evil spirit numeral（Magic-Number) and message content（Data ) .In Code fields, Echo-Request is generally represented using numeral 9;Numeral 10 represents Echo-Rep ly.Identifier fields are used for matching between Echo-request and Echo-Reply, often send out an Echo-request, Identifier field accumulations 1.Length fields are whole Echo just blunt literary length, comprising Code, Identifier, Length, Magic-Number and Data.Magic-Number fields are used to avoid loopback.Data fields can be indicated with self-defining, length by Length is unified（Except Data fields, the length of other fields is fixed).
By described above, it is recognised that Data fields can carry out it is self-defined.Therefore the embodiment of the present invention can carry some transport quality parameters information using Data fields, and the transmission quality of MPLink transmission links is detected so as to realize.The record of following embodiments is may be referred in detail.
The flow chart for the kind transmission quality detection method that Fig. 2 provides for one embodiment of the invention.The executive agent of the transmission quality detection method of the present embodiment is MLPPP one end, is properly termed as working as front end, deserves transmitting terminal or receiving terminal that front end can be MLPPP.As shown in Fig. 2 the transmission quality detection method of the present embodiment, can be as described below.
When the executive agent of the present embodiment is transmitting terminal, the opposite end in the present embodiment is receiving terminal.When the executive agent of the present embodiment is receiving terminal, the opposite end in the present embodiment is transmitting terminal.The transmitting terminal and receiving terminal of wherein the present embodiment can be respectively base station and base station controller.The transmitting terminal and receiving terminal of the present embodiment can also be respectively base station and router. 100th, the first Echo message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link；
For example, the first Echo message in the present embodiment is Echo reply or Echo request.
101st, the first group of transport quality parameters and second group of transport quality parameters on transmission link are obtained；For example, wherein first group transport quality parameters are obtained from the first Echo message.Second group of transport quality parameters is obtained from the executive agent MLPPP of the present embodiment one end,
102nd, according to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of transmission link.
The transmission quality detection method of the present embodiment, by using above-mentioned technical proposal, receives the first passback message for carrying first group of transport quality parameters that opposite end is sent, the first passback message is passback response or passback request on transmission link；Obtain first group of transport quality parameters and the second group of transport quality parameters on the transmission link；And according to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link.By using above-mentioned technical proposal, the transmission quality detection information of MLPPP MPlink transmission links can be got, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.
The flow chart for the kind transmission quality detection method that Fig. 3 provides for another embodiment of the present invention.The transmission quality detection method of the present embodiment is on the basis of above-mentioned embodiment illustrated in fig. 2, using 200,201 and 202 respectively to 100,101 and 102 specific refinements.As shown in figure 3, the transmission quality detection method of the present embodiment, can be as described below.
200th, the carrying first entrance time of opposite end transmission and the Echo Reply of second outlet time are received on transmission link.
The Echo Reply that wherein opposite end is sent are sent according to the Echo Request of first outlet time that carry for working as front end transmission received, and the first outlet time is the time that Echo Request are sent on transmission link；The first entrance time is the time that opposite end receives Echo Request, and the second outlet time is the time that opposite end sends Echo Reply. 201st, first outlet time and second entrance time are obtained；And first entrance time and second outlet time are obtained from Echo Reply.
Wherein the second entrance time is when front end receiver Echo Reply time.First outlet time and second entrance time can be specifically obtained in the present embodiment from when front end.
For example, the time i.e. first outlet time for sending Echo Request can be recorded when front end is sending Echo Request.The time i.e. second entrance time for receiving the Echo Reply can be also recorded when the Echo Reply of return are received.
202nd, the corresponding propagation delay time of transmission link is obtained according to first outlet time, first entrance time, second outlet time and second entrance time.
For example, transmission link in the present embodiment refers to MPLink transmission links, in the present embodiment, when front end can obtain the first entrance time and second outlet time of carrying in the Echo Reply received, then when front end is obtained from the first outlet time and second entrance time of oneself record, the corresponding propagation delay time of MPLink transmission links is then obtained according to first outlet time, first entrance time, second outlet time and second entrance time.
The transmission quality detection method executive agent of the present embodiment when front end can be MLPPP transmitting terminal, opposite end be MLPPP receiving terminal.
The transmission quality detection method of the present embodiment, by using above-mentioned technical proposal, can get the propagation delay time of MLPPP MPlink transmission links, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
It should be noted that on the basis of the technical scheme of above-described embodiment, before 200, when front end can send Echo Request to opposite end, while carrying the first outlet time in the Echo Request.For example, in Echo Request Data fields can be carried the first outlet time.When opposite end receives the Echo Request, the first outlet time can be got.The opposite end can be to when backfilling the first outlet time in the Echo Reply that front end is returned simultaneously.Now 201 obtain the first outlet time when front end, can not be and are obtained from the information of self record, and obtain the first outlet time in the Echo Reply that directly can be sent from opposite end.For example, the first outlet time, first entrance time and second outlet time can be carried in Echo Reply Data fields.
It should be noted that on the basis of above-described embodiment, wherein 202 obtain the corresponding propagation delay time of transmission link according to first outlet time, first entrance time, second outlet time and second entrance time, can specifically include following manner：
The corresponding unidirectional transmission time delay of MPLink transmission links can be expressed as：
(T3 -T0) - (T2- T1 ) .
2,
The corresponding transmitted in both directions time delay of the MPLink transmission links can be expressed as：（ T3 -TO ) -
( T2-T1 ) 。
Wherein TO is the first outlet time, and T1 is the first entrance time, and T2 is the second outlet time, and T3 is the second entrance time.
In practical application, MLPPP's can calculate the propagation delay time of each MPLink transmission link when front end according to above-mentioned formula, for each bar MPLink transmission links, the mode that selection calculates propagation delay time should be consistent, i.e. when selection calculates unidirectional transmission time delay, all MPLink transmission links all calculate its corresponding unidirectional transmission time delay.When selection calculates transmitted in both directions time delay, all MPLink transmission links all calculate its corresponding transmitted in both directions time delay.
It should be noted that on the basis of the technical scheme of above-described embodiment, after 102, can also include：
(1) when the difference of the corresponding propagation delay time of MPLink transmission links and reference transmission time delay exceeds the first predetermined threshold value, alarm is sent；
Above-mentioned（1) after, it can further include as follows（2 ) .
(2) when MPLink Group include at least two transmission links, send to carry in the 2nd Echo message, the 2nd Echo message to opposite end and forbid opposite end on the transmission link to be rejected Continuation sends the mark for burst of calling the score；MPLink transmission links are rejected from transmission link group with realizing.
For example, it is also possible to which opposite end sends the 2nd Echo message to when front end, MPLink transmission links are rejected from transmission link group with realizing.
Here MPLink Grou refer to the MPLink Group where MPLink transmission links.2nd Echo message is Echo request.
For example, a plurality of MPLink transmission links can be included in the MLPPP MPLink Grou worked as between front end and opposite end.Pass through the method for above-described embodiment, the propagation delay time for obtaining each MPLink transmission link can be calculated, so, a reference transmission time delay can be obtained, specifically the corresponding propagation delay time of all MPLink transmission links in MPLink Grou, which can be averaged, obtains reference transmission time delay.Because opposite end is after the message fragment that each bar MPLink transmission links are sent is received, it is necessary to carry out the restructuring of message.In order to ensure efficiency of transmission, need exist for considering the harmony of the propagation delay time of each bar MPLink transmission links in MPLink Grou.If the harmony of the propagation delay time of each bar MPLink transmission links is higher, it is easy to opposite end to recombinate the message fragment received on each bar MPLink transmission links.Therefore, for a certain bar MPLink transmission links, the corresponding propagation delay time of this MPLink transmission links can be compared with reference transmission time delay, when the difference of the corresponding propagation delay time of this MPLink transmission links and reference transmission time delay exceeds the first predetermined threshold value, it is considered that this MPLink transmission link propagation delay times are longer, the restructuring of subsequent packet is influenceed, now when front end can send alarm, so that staff makees to safeguard.For example when the MPLink Grou groups include at least two transmission links, now when the MPLink transmission links that front end can exceed the difference of propagation delay time and reference transmission time delay the first predetermined threshold value are rejected from MPLink Group.The process of implementing can be：Opposite end is forbidden to continue to send the mark for burst of calling the score on the transmission link to be rejected when front end sends to carry in the 2nd Echo message, the 2nd Echo message to opposite end；2nd Echo message be Echo request still, the LCP of MPLink transmission links consults still to can be at OPEN states again after rejecting, now in order to when between front end and opposite end MPLink transmission links carry out effective detection, when between front end and opposite end according to Certain speed sends a kind of blunt texts of test sample ^ for the data for not including any practical significance.The difference of the sample message and normal message fragment is：Head piece indicating bit B and cauda indicating bit E bit positions are 1, and length is fixed as 256Byte, payload filling random number.Therefore the propagation delay time for detecting the MPLink transmission links still can be interacted with Echo Reply by Echo Request.When the propagation delay time of the MPLink transmission links recovers normal, i.e. the difference of propagation delay time and MPLink Group reference transmission time delay is less than the first predetermined threshold value, the MPLink transmission links can be rejoined MPLink Group.Implementing to be：When carrying allows opposite end in the mark of the normal message fragment of MPLink transmission links transmission in the Echo request that front end is sent to opposite end.In practical application, the first predetermined threshold value can be set according to the actual requirements.
It should be noted that in practical application,（1) after occurring, can not directly it carry out（2 ).Can for example n times be used to this MPLink transmission links, all occurred when wherein M times（1) situation, sends alarm, now performs again（2 ) .M, N are positive integer, and M is less than N.M and N concrete numerical values can be chosen according to actual conditions.
In practical application, can also choose opposite end reconstructing failure rate whether exceed default 3rd threshold value as whether implement reject operation necessary condition.When the reconstructing failure rate of opposite end exceedes default three threshold value, when front end implements to reject operation；Otherwise do not implement to reject operation.
The flow chart for the transmission quality detection method that Fig. 4 provides for yet another embodiment of the invention.The transmission quality detection method of the present embodiment is on the basis of above-mentioned Fig. 2 illustrated embodiments, using 300,301 and 302 respectively to 100,101 and 102 specific refinements.As shown in figure 4, the transmission quality detection method of the present embodiment, can be as described below.
300th, the Echo Reply for carrying the first message fragment number that opposite end is sent are received on MPLink transmission links.
Wherein the first message fragment number was the message fragment number that opposite end is received on transmission link in the upper passback cycle.
301st, the second message fragment number is obtained；And the first message fragment number is obtained from Echo Reply. Wherein the second message fragment number is the message fragment number sent in the upper passback cycle on transmission link.
302nd, according to the first message fragment number and the second message fragment number, transmission link Dui Ying Lost bag rates are obtained.
For example, the Lost bags rate detection of this inventive embodiments is to work as front end in MLPPP（It can be transmitting terminal）Carry out.It is by taking Echo Request and the Echo Reply in a passback cycle in MLPPP transmitting procedures as an example in the present embodiment.For example after front end sends n-th of Echo Request on MPLink transmission links, when front end starts to count the message fragment sent on n-th of passback cycle MPLink transmission link, when sending (n+1)th Echo Request, stop the counting of the burst number of calling the score in n-th of passback cycle, obtain the second message fragment number.Prepare the counting of the message fragment number in (n+1)th passback cycle of beginning.Now opposite end is sent to when front end can carry the blunt literary burst number of the ability sent when front end of n-th of passback periodic recording in (n+1)th Echo Request.Accordingly, in opposite end, after opposite end receives n-th of Echo Request, also begin to count the message fragment received on n-th of passback cycle MPLink transmission link, when opposite end receives (n+1)th Echo Request, stop the counting of the burst number of calling the score in n-th of passback cycle, obtain the first message fragment number.And the message fragment number received in n-th of passback cycle of record is carried be sent in (n+1)th Echo Reply and work as front end.
When front end side, the burst number that can be called the score according to the second of n-th of record passback cycle and the first message fragment number carried in the Echo Reply received obtain the MPLink transmission links to the Lost bag rates answered.
The transmission quality detection method executive agent of the present embodiment when front end can be MLPPP transmitting terminal, opposite end be MLPPP receiving terminal.
The transmission quality detection method of the present embodiment, by using above-mentioned technical proposal, can get MLPPP MPlink transmission link Lost bag rates, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, thus improve in MLPPP transmitting procedures can Maintainability, and improve efficiency of transmission.
It should be noted that when second carried in the transmission Echo Request of front end, just blunt burst number can be specifically carried in the Data fields in Echo Request in above-described embodiment.The one 4 blunt literary burst number carried in the Echo Reply that opposite end is sent can be specifically carried in the Data fields in Echo Reply.
It should be noted that on the basis of above-described embodiment, wherein 202 opposite ends are according to the first message fragment number and the second message fragment number, transmission link Dui Ying Lost bag rates are obtained, specifically can be in the following way：
The MPLink transmission link Dui Ying Lost bags rates can be expressed as：（ X 1 -X2 ) / X 1.
What wherein XI was represented is the second message fragment number, and what X2 was represented is the first message fragment number.It should be noted that on the basis of the technical scheme of above-described embodiment, after 202, can also include：
(a) when MPLink transmission link Dui Ying Lost bags rate exceeds the second predetermined threshold value, opposite end hair
P mouthfuls.
Above-mentioned（A) after, it can further include as follows（b ) .
(b) when MPLink Group include at least two transmission links, send to carry in the 3rd Echo message, the 3rd Echo message to opposite end and forbid opposite end to continue to send the mark for burst of calling the score on the transmission link to be rejected；MPLink transmission links are rejected from transmission link group with realizing.
For example, it is also possible to which opposite end sends the 3rd Echo message to when front end, MPLink transmission links are rejected from transmission link group with realizing.
Here MPLink Grou refer to the MPLink Group where MPLink transmission links.3rd Echo message is Echo request.
For example, a plurality of MPLink transmission links can be included in the MLPPP MPLink Grou worked as between front end and opposite end.By the method for above-described embodiment, the Lost bag rates for obtaining each MPLink transmission link can be calculated.Because opposite end is receiving each bar MPLink transmission links hair , it is necessary to carry out the restructuring of message after the message fragment sent.In order to ensure recombination efficiency, need exist for considering each bar MPLink transmission links Lost bag rates in MPLink Grou.Any bar MPLink transmission links Lost bags rates all directly affect restructuring of the opposite end to message in MPLink Grou.Therefore, for a certain bar MPLink transmission links, this MPLink transmission link Dui Ying Lost bags rates can be compared with the second predetermined threshold value, when this bar MPLink transmission link Dui Ying Lost bags rate exceeds the second predetermined threshold value, it is considered that the too high influence subsequent packet restructuring of this bar MPLink transmission link Lost bags rate, now when front end can send alarm, so that staff makees to safeguard.For example when the MPLink Grou groups include at least two transmission links, now when the MPLink transmission links that front end can exceed Lost bags rate the second predetermined threshold value are rejected from MPLink Grou.But, the LCP of MPLink transmission links consults still to can be at OPEN states again after rejecting, thus still can be interacted by Echo Request with Echo Reply detection the MPLink transmission link Lost bag rates.When the MPLink transmission link Lost bags rate, which recovers normal ,, Jis Lost bags rate less than the second predetermined threshold value, the MPLink transmission links can be rejoined MPLink Group.In practical application, the second predetermined threshold value can be set according to the actual requirements.
It should be noted that in practical application,（A) after occurring, can not directly it carry out（b ).Can for example n times be used to this MPLink transmission links, all occurred when wherein M times（A) situation, sends alarm, now performs again（b ) .M, N are positive integer, and M is less than N.M and N concrete numerical values can be chosen according to actual conditions.
The flow chart for the transmission quality detection method that Fig. 5 provides for further embodiment of this invention.The transmission quality detection method of the present embodiment is on the basis of above-mentioned Fig. 2 illustrated embodiments, using 400,401 and 402 respectively to 100,101 and 102 specific refinements.As shown in figure 5, the transmission quality detection method of the present embodiment, can be as described below.
400th, the Echo Request for carrying the first message fragment number that opposite end is sent are received on MPLink transmission links;
Wherein the first message fragment number is the message fragment number sent in the upper passback cycle on transmission link. 401st, the second message fragment number of record is obtained；And the first message fragment number is obtained from Echo Request；
Wherein the second message fragment number is the message fragment number received in the upper passback cycle on transmission link.
402nd, according to the first message fragment number and the second message fragment number, transmission link Dui Ying Lost bag rates are obtained.
The transmission quality detection method executive agent of the present embodiment when front end can be MLPPP receiving terminal, opposite end be MLPPP transmitting terminal.For example, the difference of the technical scheme of the present embodiment and above-mentioned Fig. 4 illustrated embodiments is：The present embodiment describes the technical scheme of the embodiment of the present invention in receiving terminal side, and the detailed record that may be referred to above-mentioned embodiment illustrated in fig. 4 is described in detail in remaining.
The transmission quality detection method of the present embodiment, by using above-mentioned technical proposal, can get MLPPP MPlink transmission link Lost bag rates, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
It should be noted that opposite end sends first carried in Echo Request and called the score in the Data fields that piece number can be specifically carried in Echo Request in above-described embodiment.
302 when front end is according to the first message fragment number and the second message fragment number on the basis of above-described embodiment, the mode for obtaining transmission link Dui Ying Lost bag rates is identical with the technical scheme that above-mentioned embodiment illustrated in fig. 2 is follow-up, the record of above-mentioned associated description is may be referred in detail, will not be repeated here.
And after 302 in above-described embodiment, can also include：
(a) when MPLink transmission links exceed the second predetermined threshold value to the Lost bags rate answered, when front end sends alarm.
Above-mentioned（A) after, it can further include as follows（b ) .
(b) when MPLink Grou include at least two transmission links, opposite end is forbidden in the transmission to be rejected when front end sends to carry in the 4th Echo message, the 4th Echo message to opposite end Continuation sends the mark for burst of calling the score on link；MPLink transmission links are rejected from transmission link group with realizing.For example, it is also possible to which opposite end sends the 4th Echo message to when front end, MPLink transmission links are rejected from transmission link group with realizing.
Correlation explains in detail the related record that may be referred to above-described embodiment, will not be repeated here.
The flow chart for the transmission quality detection method that Fig. 6 provides for another embodiment of the present invention.The application scenarios of the present embodiment include a plurality of MPLink transmission links in MPLink Grou, and the technical scheme of the present embodiment is that a plurality of MPLink transmission links in MPLink Grou are detected.As shown in fig. 6, the transmission quality detection method of the present embodiment, can be as described below.
The application scenarios of the present embodiment are that receiving terminal or transmitting terminal are detected to each bar MPLink transmission links in MPLink Grou respectively.If receiving terminal is measured, and by transmitting terminal perform it is following operate, measurement result can be sent to receiving terminal by transmitting terminal；Vice versa.The technical scheme of the present embodiment is described in detail by taking receiving terminal as an example below.
500th, receiving terminal measures the propagation delay time of the N articles MPLink transmission link in MPLink Grou He Lost bag rates；Perform 501;
Such as detection method may be referred to the record of above-mentioned related Fig. 2-embodiment illustrated in fig. 5, will not be repeated here.For example the step can also receiving terminal measurement, measurement result is then informed into transmitting terminal.
501st, receiving terminal judges whether the Lost bags rate of the N articles MPLink transmission link exceeds the second predetermined threshold value, when being, performs 504, otherwise performs 502;
502nd, receiving terminal judges whether the propagation delay time of the N articles MPLink transmission link and the difference of reference transmission time delay exceed the first predetermined threshold value；When being, 504 are performed, 503 are otherwise performed;For example the step can be measured in transmitting terminal, and measurement result then is informed into receiving terminal.
503rd, whether the reconstructing failure rate that receiving terminal judges the message fragment received when being, performs 504, otherwise performs 505 more than the 3rd preset value;
504th, receiving terminal judges whether include the MPLink transmission links of more than two in the MPLink Group, if when, 506 are performed, 505 are otherwise performed;
505th, receiving terminal normal work, terminates. 506th, receiving terminal sends the Echo request for carrying and requiring the mark that transmitting terminal stops at the N articles MPLink transmission links 4 blunt literary burst of transmission to transmitting terminal;Perform 507;
507th, transmitting terminal stops at the N articles MPLink transmission link and sends message fragment；Perform
508;
508th, receiving terminal continues to measure the N articles MPLink transmission link, until propagation delay time and Lost bags rate recover normal, the Echo request for carrying and requiring the mark that transmitting terminal continuation sends message fragment in the N articles MPLink transmission link are sent to transmitting terminal
This 508 bundlees the N articles MPLink transmission link into MPLink Group to realize again.Continue in measurement process, transmitting terminal sends sample message to realize the measurement to the N articles MPLink transmission link to receiving terminal, above-mentioned related record is may be referred in detail, will not be repeated here, will not be repeated here.
The transmission quality detection method of the present embodiment, by using above-mentioned technical proposal, can get
MLPPP MPlink transmission link Lost bags rates and propagation delay time, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, foregoing program can be stored in a computer read/write memory medium, the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
The structural representation for the transmission quality detection means that Fig. 7 provides for one embodiment of the invention.The transmission quality detection means of the present embodiment is specifically as follows MLPPP one end, is properly termed as working as front end.Deserve transmitting terminal or receiving terminal that front end can be MLPPP.The transmitting terminal and receiving terminal of the present embodiment can be respectively base station and base station controller.The transmitting terminal and receiving terminal of the present embodiment can also be distinguished For base station and router.As shown in fig. 7, the transmission quality detection means of the present embodiment, can specifically include：Receiving module 10, acquisition module 11 and processing module 12.
Wherein receiving module 10 is used to receive the first Echo message for carrying first group of transport quality parameters that opposite end is sent on transmission link, and the first Echo message is Echo reply or Echo request.Acquisition module 11 is connected with receiving module 10, and acquisition module 11 is used to obtain second group of transport quality parameters, and obtains first group of transport quality parameters on transmission link according to receiving module 10.Processing module 12 is connected with acquisition module 11, and processing module 12 is used for the first group of transport quality parameters and second group of transport quality parameters obtained according to acquisition module 11, and calculating gets the corresponding transmission quality detection information of transmission link.
The transmission quality detection means of the present embodiment, realizes that the record of related embodiment is stated in transmission quality detection by using above-mentioned module, will not be repeated here.
The transmission quality detection means of the present embodiment, can realize by using above-mentioned module and get
The transmission quality detection information of MLPPP MPlink transmission links, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the embodiment of the present invention, the transmission quality detection information of MLPPP MPlink transmission links can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission is improved.
The structural representation for the transmission quality detection means that Fig. 8 provides for another embodiment of the present invention.As shown in figure 8, on the basis of above-mentioned embodiment illustrated in fig. 7, the receiving module of receiving module 10 in the present embodiment, specifically for receiving the carrying first entrance time of opposite end transmission and the Echo reply of second outlet time on transmission link;The Echo reply that opposite end is sent are sent according to the Echo request for carrying the first outlet time received, and the first outlet time is the time that Echo request are sent on transmission link；The first entrance time is the time that opposite end receives Echo request, and the second outlet time is the time that opposite end sends Echo reply.Acquisition module 11 is specifically for obtaining first outlet time and second entrance time；The second entrance time is the time for receiving Echo reply；And first entrance time and second outlet time are obtained in the Echo reply received from receiving module 10.Place Manage module 13 and obtain the corresponding propagation delay time of transmission link specifically for the first outlet time obtained according to acquisition module 11, first entrance time, second outlet time and second entrance time.
Alternatively, the acquisition module 11 of the present embodiment is specifically for when also carrying the first outlet time in the Echo reply that receiving module 10 is received, obtaining the first outlet time in the Echo reply received from receiving module 10；And obtain the second entrance time of record.
Alternatively, the processing module 12 of the present embodiment is specifically for obtaining the corresponding propagation delay time of transmission link in passing through equation below；The corresponding propagation delay time of transmission link=(T3_TQ)_(T2_T1 ) ;
2
Or the corresponding propagation delay time of transmission link=(T3-T0)-(T2-T1)；
Wherein TO is the first outlet time, and T1 is the first entrance time, and T2 is the second outlet time,
T3 is the second entrance time..
Alternatively, the transmission quality detection means of the present embodiment can also include：First alarm module 13.First alarm module 13 is connected with processing module 12, when the difference that the first alarm module 13 is used for the corresponding propagation delay time of the transmission link and reference transmission time delay obtained when the processing of processing module 12 exceeds the first predetermined threshold value, sends alarm.
Alternatively, the transmission quality detection means of the present embodiment can also include：First sending module 14.First sending module 14 is connected with the first alarm module 13, by the triggering of the first alarm module 13.First sending module 14 is used in the triggering by the first alarm module 13, and when transmission link group includes at least two transmission links, sending to carry in the 2nd Echo message, the 2nd Echo message to opposite end forbids opposite end to continue to send the mark for burst of calling the score on the transmission link that the first alarm module 13 is alerted；2nd Echo message is Echo request.
The transmission quality detection means of the present embodiment, realizes that the record of related embodiment is stated in transmission quality detection by using above-mentioned module, will not be repeated here.
The transmission quality detection means of the present embodiment, can realize by using above-mentioned module and get The propagation delay time of MLPPP MPlink transmission links, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
The structural representation for the transmission quality detection means that Fig. 9 provides for yet another embodiment of the invention.As shown in figure 9, on the basis of above-mentioned embodiment illustrated in fig. 7, the receiving module of receiving module 10 in the present embodiment, specifically for receiving the Echo reply for carrying the first message fragment number that opposite end is sent on transmission link;First message fragment number was the message fragment number that opposite end is received on transmission link in the upper Echo cycles.Acquisition module 11 is the message fragment number sent in the upper Echo cycles on transmission link specifically for obtaining the second message fragment number, the second message fragment number；And obtain the first message fragment number in the Echo reply received from receiving module 10.Processing module 12 obtains transmission link Dui Ying Lost bag rates specifically for the first message fragment number and the second message fragment number that are obtained according to acquisition module 11.
Alternatively, in the present embodiment processing module 12 specifically for pass through equation below obtain transmission link Dui Ying Lost bag rates；
Transmission link Dui Ying Lost bags rate=(X1-X2)/XI;Wherein XI is the second message fragment number；X2 is the first message fragment number.
Alternatively, the second alarm module 15 is also included in the transmission quality detection means of the present embodiment.Second alarm module 15 is connected with processing module 12, and the second alarm module 15 is used to, when the transmission link Dui Ying Lost bags rate that the processing of processing module 12 is obtained exceeds the second predetermined threshold value, send alarm.
Alternatively, the second sending module 16 is also included in the transmission quality detection means of the present embodiment.Second sending module 16 is connected with the second alarm module 15, by the triggering of the second alarm module 15.Second sending module 16 is used in the triggering by the second alarm module 15, and when transmission link group includes at least two transmission links, sending to carry in the 3rd Echo message, the 3rd Echo message to opposite end forbids opposite end to continue to send the mark for burst of calling the score on the transmission link that the second alarm module 15 is alerted；3rd Echo message is Echo request. The transmission quality detection means of the present embodiment, realizes that the record of related embodiment is stated in transmission quality detection by using above-mentioned module, will not be repeated here.
The transmission quality detection means of the present embodiment, the MPlink transmission link Lost bag rates for getting MLPPP can be realized by using above-mentioned module, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
Alternatively, on the basis of above-mentioned embodiment illustrated in fig. 7, receiving module 10 in above-described embodiment is specifically for the Echo request of carrying the first message fragment number that reception opposite end is sent on transmission link, and the first message fragment number is the message fragment number sent in the upper Echo cycles on transmission link.Acquisition module 11 is the message fragment number received in the upper Echo cycles on transmission link specifically for obtaining the second message fragment number recorded, the second message fragment number；And obtain the first message fragment number in the Echo request received from receiving module 10.Processing module 12 obtains transmission link Dui Ying Lost bag rates specifically for the first message fragment number and the second message fragment number that are obtained according to acquisition module 11.
Alternatively, alarm module and sending module are also included in the transmission quality detection means of the present embodiment.Alarm module may be referred to above-mentioned Fig. 8 or the first alarm module 13 and the second alarm module 15 of embodiment illustrated in fig. 9.Sending module may be referred to above-mentioned Fig. 8 or the first sending module 14 and the second sending module 16 of embodiment illustrated in fig. 9.The realization mechanism of alarm module and sending module is identical with above-mentioned Fig. 8 or embodiment illustrated in fig. 9 realization mechanism, and the record of above-described embodiment is may be referred in detail, be will not be repeated here.
The transmission quality detection means of the present embodiment, realizes that the record of related embodiment is stated in transmission quality detection by using above-mentioned module, will not be repeated here.
The transmission quality detection means of the present embodiment, acquisition can be realized by using above-mentioned technical proposal To MLPPP MPlink transmission link Lost bag rates, it compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the present embodiment, MLPPP MPlink transmission link Lost bag rates can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission are improved.
The structural representation for the Transmission system that Figure 10 provides for one embodiment of the invention.As shown in Figure 10, the Transmission system of the present embodiment, including two opposite ends；Example one end 20 and the other end 30.
Wherein one end 20 is used to receive the first Echo reply or the first Echo request that carry first group of transport quality parameters that the other end 30 is sent on transmission link;Obtain the first group of transport quality parameters and second group of transport quality parameters on transmission link；According to first group of transport quality parameters and second group of transport quality parameters, calculating gets the corresponding transmission quality detection information of transmission link.
One end 20 of the present embodiment can be MLPPP transmitting terminal or receiving terminal.Accordingly, the other end 30 can be MLPPP receiving terminal or transmitting terminal.Transmitting terminal and receiving terminal in the present embodiment can be respectively base station and base station controller.The transmitting terminal and receiving terminal of the present embodiment can also be respectively base station and router.
One end 20 of the present embodiment can be any described transmission quality detection means in above-mentioned Fig. 7-embodiment illustrated in fig. 9, and the record of above-described embodiment is may be referred in detail, be will not be repeated here.
The Transmission system of the present embodiment, by using above-mentioned technical proposal, can get the transmission quality detection information of MLPPP MPlink transmission links, compensate for lacking the transmission quality detection means to MPlink transmission links in the prior art.Using the technical scheme of the embodiment of the present invention, the transmission quality detection information of MLPPP MPlink transmission links can be got, so as to improve the maintainability in MLPPP transmitting procedures, and efficiency of transmission is improved.
Device embodiment described above is only schematical, the unit wherein illustrated as separating component can be or may not be physically separate, the part shown as unit can be or may not be physical location, a place can be located at, or can also be distributed at least two NEs.Some or all of module therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.Those of ordinary skill in the art are not paying the situation of performing creative labour Under, you can to understand and implement.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (26)

  1. Claim
    1st, a kind of transmission quality detection method, it is characterised in that including：
    The the first passback message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link, the first passback message is passback response or passback request；
    Obtain first group of transport quality parameters and the second group of transport quality parameters on the transmission link；
    According to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link.
    2nd, the transmission quality detection method according to claim 1, it is characterised in that described that the first passback message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link, is specifically included：The passback response of carrying first entrance time and second outlet time that opposite end is sent are received on transmission link；The passback response that the opposite end is sent is sent according to the passback request for carrying the first outlet time received, and the first outlet time is the time that the passback request is sent on the transmission link；The first entrance time is the time that the opposite end receives the passback request, and the second outlet time is the time that the opposite end sends the passback response；
    First group of transport quality parameters and the second group of transport quality parameters on the transmission link are obtained, are specifically included：Obtain the first outlet time and second entrance time；The time that the second entrance time responds for the reception passback；And obtain the first entrance time and the second outlet time from the passback response；
    According to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link, specifically include：The corresponding propagation delay time of the transmission link is obtained according to the first outlet time, the first entrance time, the second outlet time and the second entrance time.
    3rd, method according to claim 2, it is characterised in that when also carrying the first outlet time in the passback response, obtain the first outlet time, specifically include：The first outlet time is obtained from the passback response. 4th, the method according to claim 3, it is characterised in that the first outlet time, the first entrance time and the second outlet time are specifically carried in the data field of the passback response.
    5th, method according to claim 2, it is characterized in that, the corresponding propagation delay time of the transmission link is obtained according to the first outlet time, the first entrance time, the second outlet time and the second entrance time, specifically included：The corresponding propagation delay time of the transmission link is calculated according to equation below：The corresponding propagation delay time of the transmission link=(T3_TQ)_(T2_T1)；
    2
    Or the corresponding propagation delay time=(T3-T0)-(T2-T1) of the transmission link；Wherein TO is the first outlet time, and T1 is the first entrance time, and T2 is the second outlet time, and T3 is the second entrance time.
    6th, according to any described methods of claim 2-5, it is characterised in that also include：When the difference of the corresponding propagation delay time of the transmission link and reference transmission time delay exceeds the first predetermined threshold value, alarm is sent.
    7th, method according to claim 6, it is characterised in that the reference transmission time delay is the average value of the corresponding propagation delay time of all transmission links in transmission link group where the transmission link.
    8th, method according to claim 7, it is characterised in that when the transmission link group includes at least two transmission links, in addition to：
    Sending second to the opposite end and return to carry in message, the second passback message forbids the opposite end to continue to send the mark for burst of calling the score on the transmission link；The second passback message is asked for passback.
    9th, according to the method described in claim 1, it is characterised in that including：
    It is described that the first passback message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link, specifically include：Receive that the opposite end sends on the transmission link carries the The passback response of one message fragment number；The first message fragment number was the message fragment number that the opposite end is received on the transmission link in the upper passback cycle；
    First group of transport quality parameters and the second group of transport quality parameters on the transmission link are obtained, are specifically included：The second message fragment number is obtained, the second message fragment number is the message fragment number sent in the upper passback cycle on transmission link；And obtain the first message fragment number from the passback response；
    According to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link, specifically include：According to the first message fragment number and the second message fragment number, the transmission link Dui Ying Lost bag rates are obtained.
    10th, method according to claim 9, it is characterised in that the second message fragment number is specifically carried in the data field of the passback response.
    11st, method according to claim 9, it is characterised in that according to the first message fragment number and the second message fragment number, obtains the transmission link Dui Ying Lost bag rates, specifically includes：Transmission link Dui Ying Lost bags rate=(the X1-X2)/XI;Wherein XI is the second message fragment number；X2 is the first message fragment number.
    12nd, according to any described methods of claim 9-11, it is characterised in that also include：When the transmission link Dui Ying Lost bags rate exceeds the second predetermined threshold value, alarm is sent.
    13rd, method according to claim 12, it is characterised in that when the transmission link group includes at least two transmission links, in addition to：Sending the 3rd to the opposite end and return to carry in message, the 3rd passback message forbids the opposite end to continue to send the mark for burst of calling the score on the transmission link；The 3rd passback message is asked for passback.
    14th, according to the method described in claim 1, it is characterised by, it is described that the first passback message for carrying first group of transport quality parameters that opposite end is sent is received on transmission link, specifically include：The passback request for carrying the first message fragment number that the opposite end is sent is received on the transmission link, the first message fragment number is the message fragment number sent in the upper passback cycle on transmission link； First group of transport quality parameters and the second group of transport quality parameters on the transmission link are obtained, are specifically included：The second message fragment number of record is obtained, the second message fragment number is the message fragment number received in the upper passback cycle on the transmission link；And obtain the first message fragment number from the passback request；
    According to first group of transport quality parameters and second group of transport quality parameters, calculate and obtain the corresponding transmission quality detection information of the transmission link, specifically include：According to the first message fragment number and the second message fragment number, the transmission link Dui Ying Lost bag rates are obtained.
    15th, method according to claim 14, it is characterised in that the first message fragment number is specifically carried in the data field of the passback request.
    16th, a kind of transmission quality detection means, it is characterised in that including：
    Receiving module, for receiving the first passback message for carrying first group of transport quality parameters that opposite end is sent on transmission link, the first passback message is passback response or passback request；
    Acquisition module, for obtaining first group of transport quality parameters and second group of transport quality parameters on the transmission link；
    Processing module, for according to first group of transport quality parameters and second group of transport quality parameters, calculating to get the corresponding transmission quality detection information of the transmission link.
    17th, device according to claim 16, it is characterised in that：
    The receiving module, is responded specifically for the passback that carrying first entrance time and second outlet time that opposite end is sent are received on transmission link；The passback response that the opposite end is sent is sent according to the passback request for carrying the first outlet time received, and the first outlet time is the time that the passback request is sent on the transmission link；The first entrance time is the time that the opposite end receives the passback request, and the second outlet time is the time that the opposite end sends the passback response；
    The acquisition module, specifically for obtaining the first outlet time and second entrance time；The time that the second entrance time responds for the reception passback；And obtain the first entrance time and the second outlet time from the passback response； The processing module, specifically for obtaining the corresponding propagation delay time of the transmission link according to the first outlet time, the first entrance time, the second outlet time and the second entrance time.
    18th, device according to claim 17, it is characterised in that the acquisition module, specifically for when also carrying the first outlet time in the passback response, the first outlet time is obtained from the passback response；And obtain the second entrance time of record.
    19th, device according to claim 17, it is characterised in that the processing module, specifically for obtaining the corresponding propagation delay time of the transmission link by equation below；
    The corresponding propagation delay time of the transmission link=(T3_TQ)_(T2_T1)；
    2
    Or the corresponding propagation delay time=(T3-T0)-(T2-T1) of the transmission link；Wherein TO is the first outlet time, and T1 is the first entrance time, and T2 is the second outlet time, and T3 is the second entrance time.
    20th, according to any described devices of claim 17-19, it is characterised in that also include：First alarm module, for when the difference of the corresponding propagation delay time of the transmission link and reference transmission time delay exceeds the first predetermined threshold value, sending alarm.
    21st, device according to claim 20, it is characterised in that also include：
    First sending module, for when the transmission link group includes at least two transmission links, sending second to the opposite end and return to carry in message, the second passback message forbids the opposite end to continue to send the mark for burst of calling the score on the transmission link；The second passback message is asked for passback.
    22nd, device according to claim 16, it is characterised in that：
    The receiving module, the passback for carrying the first message fragment number sent specifically for receiving the opposite end on the transmission link is responded；The first message fragment number was the message fragment number that the opposite end is received on the transmission link in the upper passback cycle；
    The acquisition module, specifically for obtaining the second message fragment number, second message fragment Number is the message fragment number sent in the upper passback cycle on transmission link；And obtain the first message fragment number from the passback response；
    The processing module, specifically for according to the first message fragment number and the second message fragment number, obtaining the transmission link Dui Ying Lost bag rates.
    23rd, device according to claim 22, it is characterised in that the processing module, specifically for obtaining the transmission link Dui Ying Lost bag rates by equation below；
    Transmission link Dui Ying Lost bags rate=(the X1-X2)/XI;Wherein XI is the second message fragment number；X2 is the first message fragment number.
    24th, the device according to claim 22 or 23, it is characterised in that also include：Second alarm module, for when the transmission link Dui Ying Lost bags rate exceeds the second predetermined threshold value, sending alarm.
    25th, device according to claim 24, it is characterised in that also include：
    Second sending module, for when the transmission link group includes at least two transmission links, sending the 3rd to the opposite end and return to carry in message, the 3rd passback message forbids the opposite end to continue to send the mark for burst of calling the score on the transmission link；The 3rd passback message is asked for passback.
    26th, device according to claim 16, it is characterised in that：
    The receiving module, is asked specifically for the passback that carrying the first message fragment number that the opposite end is sent is received on the transmission link, and the first message fragment number is the message fragment number sent in the upper passback cycle on transmission link；
    The acquisition module, the second message fragment number specifically for obtaining record, the second message fragment number is the message fragment number received in the upper passback cycle on the transmission link；And obtain the first message fragment number from the passback request；
    The processing module, specifically for according to the first message fragment number and the second message fragment number, obtaining the transmission link Dui Ying Lost bag rates.
    27th, a kind of Transmission system, it is characterised in that including two relative ends； Wherein one end, for receiving the first passback message for carrying first group of transport quality parameters that the other end is sent on transmission link, the first passback message is passback response or passback request；Obtain first group of transport quality parameters and the second group of transport quality parameters on the transmission link；According to first group of transport quality parameters and second group of transport quality parameters, calculating gets the corresponding transmission quality detection information of the transmission link.
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