CN103188120B - The method for detecting packet loss of a kind of multicast service and device - Google Patents
The method for detecting packet loss of a kind of multicast service and device Download PDFInfo
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- CN103188120B CN103188120B CN201310119292.6A CN201310119292A CN103188120B CN 103188120 B CN103188120 B CN 103188120B CN 201310119292 A CN201310119292 A CN 201310119292A CN 103188120 B CN103188120 B CN 103188120B
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Abstract
The embodiment of the invention discloses method for detecting packet loss and the device of a kind of multicast service, the method includes: the first network element issues the first message to the second network element, carries multicast identifier, initial time and termination time in described first message；First network element adds up the first quantity of the designated multicast data message that the first network element local reception is arrived in described initial time to termination time；Described designated multicast data message refers to the multicast data message in the multicast group that described multicast identifier indicates；First network element issues the second message to the second network element, described second message carries the first quantity of described designated multicast data message, in order to the second network element according to described first quantity determine the second network element local reception to designated multicast data message whether there is packet loss.The embodiment of the present invention is capable of detecting when whether each network element occurs the packet loss of multicast data message.
Description
Technical field
The present invention relates to the communications field, particularly relate to method for detecting packet loss and the device of a kind of multicast service.
Background technology
Multicast service in Internet protocol (IP, Internet Protocol) network, it is achieved that multicast data message
Duplication from a node to multiple nodes.
Network element in network successively multicast data forwarding message, the most at last multicast data message send to user terminal (UE,
User Equipment).For example, with reference to the networking structure shown in Fig. 1, operator edge converging equipment (PE-AGG,
Provider Edge-Aggregation) by multicast data message send near user provider edge equipment (UPE,
User Provider Edge), then by UPE, described multicast data message is sent to Digital Subscriber Line Access Multiplexer
(DSLAM, Digital Subscriber Line Access Multiplexer), and then by DSLAM by multicast datagram
Literary composition sends to each UE.Wherein, PE-AGG is properly termed as the upstream network element of UPE and DSLAM, UPE and DSLAM
It is properly termed as the downstream network element of PE-AGG；UPE is properly termed as the upstream network element of DSLAM, and DSLAM is properly termed as
The downstream network element of UPE.
But, reason based on communication condition etc., upstream network element by multicast data packet forwarding to downstream network element, and then
During being forwarded to UE, it may occur that the packet loss of multicast data message.But, how it is not disclosed in prior art
Realize the detection of multicast data message packet loss in multicast service.
Summary of the invention
The embodiment of the present invention provides method for detecting packet loss and the device of a kind of multicast service, it is possible to detect each network element
Whether there is the packet loss of multicast data message.
First aspect, the embodiment of the present invention provides the method for detecting packet loss of a kind of multicast service, including:
First network element issues the first message to the second network element, described first message carries multicast identifier, initial time and
The termination time, described first network element is the upstream network element of the second network element；
Described first network element adds up what described first network element local reception was arrived in described initial time to described termination time
First quantity of designated multicast data message；Described designated multicast data message refers to the multicast that described multicast identifier indicates
Multicast data message in group；
Described first network element issues the second message to described second network element, carries described first quantity in described second message.
In conjunction with above-mentioned first aspect, in the first possible implementation of first aspect, the first network element sends the first message
The most also include:
First network element issues local time parameter to the second network element.
Second aspect, the embodiment of the present invention provides the method for detecting packet loss of a kind of multicast service, including:
Second network element receives the first message that the first network element is issued, described first message carries multicast identifier, initial time
Between and terminate the time, described first network element is the upstream network element of the second network element；
Described second network element adds up what described second network element local reception was arrived in described initial time to described termination time
Second quantity of designated multicast data message；Described designated multicast data message refers to the multicast that described multicast identifier indicates
Multicast data message in group；
Described second network element receives the second message that described first network element is issued, and carries described designated groups in described second message
First quantity of multicast data message；
Described second network element determines what described second network element local reception was arrived according to described first quantity and described second quantity
Whether described designated multicast data message there is packet loss.
In conjunction with above-mentioned second aspect, in the first possible implementation of second aspect, described second network element is according to described
First quantity and described second quantity determine local reception to described designated multicast data message whether occur packet loss to include:
Calculate described first quantity and the difference of described second quantity, determine that whether described difference is not less than difference threshold；
If described difference is not less than difference threshold, determine the described designated multicast data that described second network element local reception is arrived
Message generation packet loss；
If described difference is less than difference threshold, determine the described designated multicast datagram that described second network element local reception is arrived
There is not packet loss in literary composition.
In conjunction with above-mentioned second aspect, and/or the first possible implementation of second aspect, may at second aspect the second
Implementation in, before the second network element receives the first message, also include:
Described second network element receives the time parameter that described first network element is issued, and carries out clock school according to described time parameter
Accurate.
In conjunction with above-mentioned second aspect, and/or the first possible implementation of second aspect, and/or second aspect the second
Possible implementation, in the third possible implementation of second aspect, the second network element determines the institute that local reception is arrived
After stating designated multicast data message generation packet loss, also include:
Multicast identifier described in described second reported by network elements and the Bridge Address of described second network element.
The third aspect, the embodiment of the present invention provides the packet loss detection device of a kind of multicast service, including:
First transmitting element, for issuing the first message to the second network element, described first message carries multicast identifier,
Initial time and the time of termination；
First statistic unit, for described first transmitting element send described first message in carry described initial time
Between to the first quantity adding up the designated multicast data message that described first network element local reception is arrived in the described termination time；Institute
State designated multicast data message and refer to the multicast data message in the multicast group that described multicast identifier indicates；By described first
Quantity is sent to described first transmitting element；
Described first transmitting element is additionally operable to: issues the second message to described second network element, carries institute in described second message
Stating the first quantity, described first network element is the upstream network element of the second network element.
In conjunction with the above-mentioned third aspect, in the first possible implementation of the third aspect, described first transmitting element is also used
In: before sending the first message, issue local time parameter to described second network element.
Fourth aspect, the embodiment of the present invention provide a kind of multicast service packet loss detection device, including receive unit, second
Statistic unit and determine unit, wherein:
Described reception unit, for receiving the first message that the first network element is issued, carries multicast group mark in described first message
Knowledge, initial time and termination time, described multicast identifier, described initial time and described termination time are sent to institute
State the second statistic unit；
Described second statistic unit, for adding up the second network element local reception in described initial time to described termination time
Second quantity of the designated multicast data message arrived；Described designated multicast data message refers to what described multicast identifier indicated
Multicast data message in multicast group；It is sent to described second quantity described determine unit；
Described reception unit is additionally operable to: receives the second message that described first network element is issued, carries institute in described second message
State the first quantity of designated multicast data message, be sent to described first quantity described determine unit；
Described determine unit, for determining described second network element local reception according to described first quantity and described second quantity
To described designated multicast data message whether occur packet loss, described first network element to be the upstream network element of the second network element.
In conjunction with above-mentioned fourth aspect, in the first possible implementation of fourth aspect, determine unit specifically for:
Calculate described first quantity and the difference of described second quantity, it is judged that whether described difference is not less than difference threshold；
If described difference is not less than difference threshold, determine the described designated multicast data that described second network element local reception is arrived
Message generation packet loss；
If described difference is less than difference threshold, determine the described designated multicast datagram that described second network element local reception is arrived
There is not packet loss in literary composition.
In conjunction with above-mentioned fourth aspect, and/or the first possible implementation of fourth aspect, may at fourth aspect the second
Implementation in, described device also includes alignment unit, wherein
Described reception unit is additionally operable to: before receiving described first message, receives the time parameter that described first network element is issued,
Described time parameter is sent to described alignment unit；
Described alignment unit, for carrying out clock alignment according to described time parameter.
In conjunction with above-mentioned fourth aspect, and/or the first possible implementation of fourth aspect, and/or fourth aspect the second
Possible implementation, in the third possible implementation of fourth aspect, also includes:
Report unit, for reporting described multicast identifier and the Bridge Address of described second network element.
In the present embodiment, the first network element issues the first message to the second network element, described first message carries multicast identifier,
Initial time and the time of termination；First network element is added up the first network element local reception in described initial time to termination time and is arrived
The first quantity of designated multicast data message；Described designated multicast data message refers to the group that described multicast identifier indicates
Broadcast the multicast data message in group；First network element issues the second message to the second network element, carries described in described second message
First quantity of designated multicast data message, in order to the second network element determines the second network element local reception according to described first quantity
To designated multicast data message whether there is packet loss.It is achieved thereby that whether network element be there is multicast data message packet loss
Detection.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, will make required in embodiment below
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is prior art networking structure exemplary plot；
Fig. 2 is the method for detecting packet loss first embodiment schematic diagram of multicast service of the present invention；
Fig. 3 is method for detecting packet loss the second embodiment schematic diagram of multicast service of the present invention；
Fig. 4 is method for detecting packet loss the 3rd embodiment schematic diagram of multicast service of the present invention；
Fig. 5 is the packet loss detection device first embodiment schematic diagram of multicast service of the present invention；
Fig. 6 is packet loss detection device the second embodiment schematic diagram of multicast service of the present invention；
Fig. 7 is the structural representation of network element of the present invention；
Fig. 8 is another structural representation of network element of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Description, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Base
Embodiment in the present invention, it is all that those of ordinary skill in the art are obtained under not paying creative work premise
Other embodiments, broadly fall into the scope of protection of the invention.
Seeing Fig. 2, for the method for detecting packet loss first embodiment schematic diagram of multicast service of the present invention, the method includes:
201: the first network elements issue the first message to the second network element, carry multicast identifier, initiate in described first message
Time and the time of termination；
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
202: described first network element adds up described first network element local reception in described initial time to described termination time
First quantity of the designated multicast data message arrived；Described designated multicast data message refers to what described multicast identifier indicated
Multicast data message in multicast group；
203: described first network element issues the second message to described second network element, carries described appointment in described second message
First quantity of multicast data message, in order to the second network element determines described second network element local reception according to described first quantity
To designated multicast data message whether there is packet loss.
Wherein, the realization that described first network element issues the second message to described second network element refers to the first net described in 201
Unit issues the explanation of the first message to the second network element, does not repeats.
In the present embodiment, the first network element issues the first message to the second network element, described first message carries multicast identifier,
Initial time and the time of termination；First network element is added up the first network element local reception in described initial time to termination time and is arrived
The first quantity of designated multicast data message；Described designated multicast data message refers to the group that described multicast identifier indicates
Broadcast the multicast data message in group；First network element issues the second message to the second network element, carries described in described second message
First quantity of designated multicast data message, in order to the second network element determines the second network element local reception according to described first quantity
To designated multicast data message whether there is packet loss.It is achieved thereby that whether occur multicast data message to lose each network element
The detection of bag.
And, the first message that the first network element is issued includes multicast identifier, such that it is able to specify each the second network element pair
Multicast data message in a certain particular multicast group carries out packet loss detection.
Seeing Fig. 3, for method for detecting packet loss the second embodiment schematic diagram of multicast service of the present invention, the method includes:
301: the second network elements receive first network element issue the first message, described first message carries multicast identifier,
Initial time and the time of termination；
302: described second network element adds up what the second network element local reception was arrived in described initial time to described termination time
Second quantity of designated multicast data message；Described designated multicast data message refers to the multicast that described multicast identifier indicates
Multicast data message in group；
303: described second network element receives the second message that described first network element is issued, described second message carry described
First quantity of designated multicast data message；
304: described second network element determines described second network element local reception according to described first quantity and described second quantity
To described designated multicast data message whether there is packet loss.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
In the present embodiment, according to described first quantity and described second quantity, the second network element determines that the second network element local reception is arrived
Described designated multicast data message whether there is packet loss, it is achieved thereby that whether there is multicast number for each second network element
Detection according to message packet loss.
And, the first message that the first network element is issued includes multicast identifier, such that it is able to specify each the second network element pair
Multicast data message in a certain particular multicast group carries out packet loss detection.
Seeing Fig. 4, for method for detecting packet loss the 3rd embodiment schematic diagram of multicast service of the present invention, the method includes:
401: the first network elements issue local time parameter to the second network element；
402: each second network element receives the time parameter that described first network element is issued, when carrying out according to described time parameter
Clock is calibrated.
By clock alignment, so that the clock of the first network element and each the second network element synchronizes, thus ensure subsequent step
In 404 first network element and the second network element can according to described initial time and terminate that time synchronization implementation local reception arrives the
The statistics of one message.
Wherein, the issue of described time parameter and described clock alignment can based on NTP (NTP,
Network Time Protocol) realize.
403: the first network elements issue the first message to the second network element, carry multicast identifier, initiate in described first message
Time and the time of termination.
Optionally, described first message can also carry difference threshold, in order in 406, second network element can be according to this
Difference threshold carries out whether the second network element occurs the judgement of designated multicast data message packet loss.When described first message is not taken
When carrying described difference threshold, the described difference threshold in 406 can be preset in each second network element.
Wherein, described first message can pass through Internet Group Management Protocol (IGMP, Internet Group
Management Protocol) realization of Query message.Concrete, described IGMP Query message can be extended
Additional data (Additional Data) field, carries described multicast group mark in the Additional Data field of extension
Knowledge, initial time and termination time, or, carry described multicast identifier, initial time, termination time and described difference
Value threshold value.
404: described first network element adds up the appointment that the first network element local reception is arrived in described initial time to termination time
First quantity of multicast data message；Described second network element adds up the second network element originally in described initial time to termination time
The second quantity of designated multicast data message of receiving；
405: the first network elements issue the second message to the second network element, carry described designated multicast data in described second message
First quantity of message.
Wherein, described second message can also be realized by IGMP Query message.Concrete, can extend described
The Additional Data field of IGMP Query message, carries described finger in the Additional Data field of extension
Determine the first quantity of multicast data message.
406: the second network elements receive the second message that the first network element is issued, according to described first quantity and described second quantity
Determine the second network element local reception to described designated multicast data message whether there is packet loss, when there is packet loss, perform
407；When there is not packet loss, currently processed flow process terminates.
Wherein, described second network element determines, according to described first quantity and described second quantity, the described appointment that local reception is arrived
Whether multicast data message occurs packet loss to include:
Second network element calculates described first quantity and the difference of described second quantity, it is judged that whether described difference is not less than difference
Threshold value；
If described difference is not less than difference threshold, the second network element determines the described designated multicast that the second network element local reception is arrived
Data message generation packet loss；
If described difference is less than difference threshold, the second network element determines the described designated multicast number that the second network element local reception is arrived
Packet loss is there is not according to message.
Multicast identifier described in 407: the second reported by network elements and the Bridge Address of self.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
Wherein, each network element has unique Bridge Address identifying this network element.
Alternatively, it is also possible to report described first quantity and the difference etc. of described second quantity, be not intended to here.
Wherein, described multicast identifier and the Bridge Address of self can be reported NM server etc. by described second network element
To the network element equipment whether packet loss is managed.
In the present embodiment, the first network element is issued to the second network element and is carried the of multicast identifier, initial time and the termination time
One message, thus the designated multicast data that the multicast identifier that simultaneously arrives local reception of the first network element and the second network element is corresponding
Message is added up, and by the first network element the first quantity of the designated multicast data message self added up is distributed to each
Two network elements, the second network element the second quantity obtained according to described first quantity and this geo-statistic judges whether self occurs
The packet loss of designated multicast data message, it is achieved thereby that the detection that the second network element is to designated multicast data message whether packet loss；
And, the first network element carries multicast identifier in the first message that the second network element is issued, such that it is able to by the first net
Unit specifies the multicast group carrying out packet loss detection；
It addition, during the second network element generation packet loss, described multicast identifier and the Bridge Address of self are reported network manager service
Device such that it is able to the most quickly orient network element and the multicast group that there occurs packet loss.
Seeing Fig. 5, for the packet loss detection device first embodiment structure chart of multicast service of the present invention, this device can be arranged
In described first network element, this device 500 includes the first transmitting element 510 and the first statistic unit 520, wherein:
Described first transmitting element 510, for issuing the first message to the second network element, carries multicast in described first message
Group mark, initial time and termination time；
Described first statistic unit 520, for carrying in described first message that described first transmitting element 510 sends
Described initial time to the first number adding up the designated multicast data message that the first network element local reception is arrived in the termination time
Amount；Described designated multicast data message refers to the multicast data message in the multicast group that described multicast identifier indicates；By institute
The first quantity stating designated multicast data message is sent to described first transmitting element 510；
Described first transmitting element 510 is additionally operable to: issues the second message to described second network element, takes in described second message
The first quantity with described designated multicast data message, in order to described second network element determines the second net according to described first quantity
Unit local reception to designated multicast data message whether there is packet loss.
Alternatively, described first transmitting element 510 can be also used for: before sending the first message, issues to the second network element
Local time parameter, in order to the second network element carries out clock alignment based on described time parameter.
In the present embodiment, described first transmitting element 510 issues the first message, described first message to described second network element
In carry multicast identifier, initial time and termination time；First statistic unit 520 in described initial time to when terminating
First quantity of the designated multicast data message that the first network element local reception of interior statistics is arrived；Described designated multicast data message
Refer to the multicast data message in the multicast group that described multicast identifier indicates；First transmitting element 510 is sent out to the second network element
Cloth the second message, carries the first quantity of described designated multicast data message in described second message, in order to the second network element root
According to described first quantity determine the second network element local reception to designated multicast data message whether there is packet loss.Thus realize
Whether each first network element is occurred the detection of multicast data message packet loss.
And, the first message that described first transmitting element 510 is issued includes multicast identifier, such that it is able to specify each
Individual second network element carries out packet loss detection to the multicast data message in a certain particular multicast group.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
Seeing Fig. 6, for packet loss detection device the second example structure figure of multicast service of the present invention, this device can be arranged
In described second network element, this device 600 includes receiving unit the 610, second statistic unit 620 and determining unit 630,
Wherein:
Described reception unit 610, for receiving the first message that the first network element is issued, carries multicast in described first message
Group mark, initial time and termination time, described multicast identifier, initial time and termination time are sent to described the
Two statistic units 620；
Described second statistic unit 620, for adding up the second network element local reception in described initial time to termination time
Second quantity of the designated multicast data message arrived；Described designated multicast data message refers to what described multicast identifier indicated
Multicast data message in multicast group；It is sent to described second quantity described determine unit 630；
Described reception unit 610 is additionally operable to: receives the second message that the first network element is issued, carries institute in described second message
State the first quantity of designated multicast data message, be sent to described first quantity described determine unit 630；
Described determine unit 630, for determining the second network element local reception according to described first quantity and described second quantity
To described designated multicast data message whether there is packet loss.
Optionally it is determined that unit 630 specifically may be used for:
Calculate described first quantity and the difference of described second quantity, it is judged that whether described difference is not less than difference threshold；
If described difference is not less than difference threshold, determine the described designated multicast data message that the second network element local reception is arrived
There is packet loss；
If described difference less than difference threshold, determines that described designated multicast data message that the second network element local reception arrives is not
There is packet loss.
Alternatively, described reception unit 610 can be also used for: before receiving the first message, receives what the first network element was issued
Time parameter, is sent to alignment unit by described time parameter；
Accordingly, described device 600 can also include: alignment unit, for carrying out clock school according to described time parameter
Accurate.
Alternatively, described device 600 can also include: reports unit, is used for reporting described multicast identifier and described
The Bridge Address of two network elements.
In the present embodiment, determine according to described first quantity and described second quantity, unit 630 determines that second network element this locality connects
Whether the described designated multicast data message received there is packet loss, it is achieved thereby that whether there is multicast datagram for network element
The detection of literary composition packet loss.
And, the first message that the first network element is issued includes multicast identifier, such that it is able to specify each the second network element pair
Multicast data message in a certain particular multicast group carries out packet loss detection.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
See Fig. 7, the network element structural representation provided for the embodiment of the present invention, network element 700 includes: processor 710,
Memorizer 720, transceiver 730 and bus 740；
Processor 710, memorizer 720, transceiver 730 are connected with each other by bus 740；Bus 740 can be ISA
Bus, pci bus or eisa bus etc..Described bus can be divided into address bus, data/address bus, control bus etc..
For ease of representing, Fig. 7 only represents with a thick line, it is not intended that an only bus or a type of bus.
Memorizer 720, is used for depositing program.Specifically, program can include that program code, described program code include
Computer-managed instruction.Memorizer 720 may comprise high-speed RAM memorizer, it is also possible to also includes non-volatile memories
Device (non-volatile memory), for example, at least one disk memory.
Transceiver 730 is used for connecting other equipment, and communicates with other equipment.Concrete, transceiver 730 is used for:
Issue the first message to the second network element, described first message carries multicast identifier, initial time and termination time；To
Second network element issues the second message, carries the first quantity of described designated multicast data message in described second message, in order to
Second network element according to described first quantity determine the second network element local reception to designated multicast data message whether lose
Bag.
Described processor 710 performs described program code, for adding up the first network element in initial time to termination time originally
The first quantity of designated multicast data message of receiving；Described designated multicast data message refers to that multicast identifier indicates
Multicast group in multicast data message；
Alternatively, transceiver 730 can be also used for: issues local time parameter to the second network element, in order to the second network element
Clock alignment is carried out based on described time parameter.
In the present embodiment, transceiver 730 issues the first message to the second network element, carries multicast group mark in described first message
Knowledge, initial time and termination time；Described processor 710 adds up the first network element in described initial time to termination time
First quantity of the designated multicast data message that local reception is arrived；Described designated multicast data message refers to described multicast group mark
Know the multicast data message in the multicast group of instruction；Transceiver 730 issues the second message, described Secondary Report to the second network element
Literary composition carries the first quantity of described designated multicast data message, in order to the second network element determines second according to described first quantity
Network element local reception to designated multicast data message whether there is packet loss.It is achieved thereby that whether each first network element is sent out
The detection of raw multicast data message packet loss.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
Seeing Fig. 8, for another structural representation of embodiment of the present invention network element, described network element 800 includes: processor 810,
Memorizer 820 and transceiver 830；
Processor 810, memorizer 820, transceiver 830 are connected with each other by bus 840；Bus 840 can be ISA
Bus, pci bus or eisa bus etc..Described bus can be divided into address bus, data/address bus, control bus etc..
For ease of representing, Fig. 8 only represents with a thick line, it is not intended that an only bus or a type of bus.
Memorizer 820, is used for depositing program.Specifically, program can include that program code, described program code include
Computer-managed instruction.Memorizer 820 may comprise high-speed RAM memorizer, it is also possible to also includes non-volatile memories
Device (non-volatile memory), for example, at least one disk memory.
Described transceiver 830 is used for connecting other equipment, and communicates with other equipment.Concrete, transceiver 830
For: receive the first message that the first network element is issued, described first message carries multicast identifier, initial time and end
The only time；Receive the second message that the first network element is issued, described second message carries described designated multicast data message
First quantity；
Described processor 810 performs described program code, for adding up the second net in described initial time to termination time
Second quantity of the designated multicast data message that unit's local reception is arrived；Described designated multicast data message refers to described multicast group
Multicast data message in the multicast group of mark instruction；It is additionally operable to determine according to described first quantity and described second quantity
Two network element local receptions to described designated multicast data message whether there is packet loss.
Alternatively, described processor 810 can be realized by the following method described according to described first quantity and described second
Quantity determine local reception to described designated multicast data message whether there is packet loss: calculate described first quantity and described
The difference of the second quantity, it is judged that whether described difference is not less than difference threshold；If described difference is not less than difference threshold,
Determine the described designated multicast data message generation packet loss that local reception is arrived；If described difference is less than difference threshold, determine
Local reception to described designated multicast data message there is not packet loss.
Described transceiver 830 can be also used for: before receiving the first message, receives the time parameter that the first network element is issued；
Accordingly, described processor 810 can be also used for: carries out clock alignment according to described time parameter.
Described transceiver 830 can be also used for: described processor 810 determines the described designated multicast data that local reception is arrived
After message generation packet loss, report described multicast identifier and the Bridge Address of described second network element.
In the present embodiment, according to described first quantity and described second quantity, described processor 810 determines that the second network element is local
Whether the described designated multicast data message received there is packet loss, it is achieved thereby that whether there is multicast packet for network element
The detection of message packet loss.
And, the first message received includes multicast identifier, such that it is able to specify network element to a certain particular multicast group
In multicast data message carry out packet loss detection.
Here, described first network element can be the upstream network element of the second network element, and the second network element can be the downstream of the first network element
Network element.Described first network element is issued the first message to the second network element and is referred to: the first message is sent to the first jumping by the first network element
The second network element, then by first jump the second network element by first message send to second jump the second network element, by that analogy,
Until the first message is sent to the second network element of final jump, so that the first message diffuses to the first network element downstream
The process of all second network elements.
As a example by the networking structure shown in Fig. 1, described first network element can be PE-AGG, and described second network element can be
UPE and DSLAM；Or, described first network element can be UPE, and described second network element can be DSLAM.
When described first network element is PE-AGG, and described second network element is UPE and DSLAM, described first network element
Issue the first message to the second network element to refer to: the first message is sent to UPE by PE-AGG, then reported first by UPE
Literary composition sends to DSLAM, so that the first message diffuses to all UPEs' and DSLAM in PE-AGG downstream
Process.
Wherein, described multicast identifier is for unique mark one multicast group；Multicast identifier corresponding to different multicast group is not
With.
Those skilled in the art it can be understood that can add by software to the technology in the embodiment of the present invention required
The mode of general hardware platform realizes.Based on such understanding, the technical scheme in the embodiment of the present invention substantially or
Saying that the part contributing prior art can embody with the form of software product, this computer software product is permissible
It is stored in storage medium, such as ROM(Read Only Memory, read only memory)/RAM(Random Access
Memory, random access memory), magnetic disc, CD etc., including some instructions with so that a computer equipment is (permissible
It is personal computer, server, or the network equipment etc.) perform each embodiment of the present invention or some portion of embodiment
Method described in point.
Each embodiment in this specification all uses the mode gone forward one by one to describe, identical similar part between each embodiment
Seeing mutually, what each embodiment stressed is the difference with other embodiments.Especially for system
For embodiment, owing to it is substantially similar to embodiment of the method, so describe is fairly simple, relevant part sees method
The part of embodiment illustrates.
In the embodiment of the present invention, PE can be router or switch, and AGG can be router or switch,
Network element can be router or switch.
Invention described above embodiment, is not intended that limiting the scope of the present invention.Any the present invention's
Amendment, equivalent and the improvement etc. made within spirit and principle, should be included within the scope of the present invention.
Claims (18)
1. the method for detecting packet loss of a multicast service, it is characterised in that including:
First network element issues the first message to the second network element, described first message carries multicast identifier, initial time and
The termination time, described first network element is the upstream network element of the second network element；
Described first network element adds up what described first network element local reception was arrived in described initial time to described termination time
First quantity of designated multicast data message；Described designated multicast data message refers to the multicast that described multicast identifier indicates
Multicast data message in group；
Described first network element issues the second message to described second network element, carries described first number in described second message
Amount, so that described second network element is according to the first described quantity and in described initial time to described termination time
Second quantity of the described designated multicast data message that the described second network element local reception that interior statistics obtains is arrived, determines
Described second network element local reception to described designated multicast data message whether there is packet loss.
Method the most according to claim 1, it is characterised in that the first network element also includes before sending the first message:
First network element issues local time parameter to the second network element.
Method the most according to claim 1, it is characterised in that described first message and described second message are
Internet Group Management Protocol query message, described multicast identifier, initial time and the termination time that described first message carries
Being carried in the extended field of described first message, described first quantity that described second message carries is carried on described second
In the extended field of message.
4. the method for detecting packet loss of a multicast service, it is characterised in that including:
Second network element receives the first message that the first network element is issued, described first message carries multicast identifier, initial time
Between and terminate the time, described first network element is the upstream network element of the second network element；
Described second network element adds up what described second network element local reception was arrived in described initial time to described termination time
Second quantity of designated multicast data message；Described designated multicast data message refers to the multicast that described multicast identifier indicates
Multicast data message in group；
Described second network element receives the second message that described first network element is issued, and carries described designated groups in described second message
First quantity of multicast data message；Described first quantity refers to that described first network element is when described initial time to described termination
The interior quantity adding up the described designated multicast data message that described first network element local reception is arrived；Described second network element according to
Described first quantity and described second quantity determine described second network element local reception to described designated multicast data message be
No generation packet loss.
Method the most according to claim 4, it is characterised in that described second network element according to described first quantity and
Described second quantity determine local reception to described designated multicast data message whether occur packet loss to include:
Calculate described first quantity and the difference of described second quantity, determine that whether described difference is not less than difference threshold；
If described difference is not less than difference threshold, determine the described designated multicast data that described second network element local reception is arrived
Message generation packet loss；
If described difference is less than difference threshold, determine the described designated multicast datagram that described second network element local reception is arrived
There is not packet loss in literary composition.
Method the most according to claim 4, it is characterised in that before the second network element receives the first message, also wrap
Include:
Described second network element receives the time parameter that described first network element is issued, and carries out clock school according to described time parameter
Accurate.
Method the most according to claim 5, it is characterised in that before the second network element receives the first message, also wrap
Include:
Described second network element receives the time parameter that described first network element is issued, and carries out clock school according to described time parameter
Accurate.
8. according to the method described in any one of claim 4 to 7, it is characterised in that the second network element determines local reception
After the described designated multicast data message generation packet loss arrived, also include:
Multicast identifier described in described second reported by network elements and the Bridge Address of described second network element.
Method the most according to claim 4, it is characterised in that described first message and described second message are
Internet Group Management Protocol query message, described multicast identifier, initial time and the termination time that described first message carries
Carrying with the extended field of described first message, described first quantity that described second message carries is carried on described second
In the extended field of message.
10. the packet loss detection device of a multicast service, it is characterised in that including:
First transmitting element, for issuing the first message to the second network element, described first message carries multicast identifier,
Initial time and the time of termination；
First statistic unit, for described first transmitting element send described first message in carry described initial time
Between the first quantity of designated multicast data message of arriving to statistics the first network element local reception in the described termination time；Described finger
Determine multicast data message and refer to the multicast data message in the multicast group that described multicast identifier indicates；By described first quantity
It is sent to described first transmitting element；
Described first transmitting element is additionally operable to: issue the second message to described second network element, and described first network element is the second net
The upstream network element of unit, carries described first quantity in described second message, so that described second network element is according to described the
One quantity and in described initial time to adding up the institute that the described second network element local reception obtained is arrived in the described termination time
State the second quantity of designated multicast data message, determine the described designated multicast datagram that described second network element local reception is arrived
Whether literary composition there is packet loss.
11. devices according to claim 10, it is characterised in that described first transmitting element is additionally operable to: send
Before first message, issue local time parameter to described second network element.
12. devices according to claim 10, it is characterised in that described first message and described second message are equal
For Internet Group Management Protocol query message, when described multicast identifier, initial time and termination that described first message carries
Between be carried in the extended field of described first message, described first quantity that described second message carries is carried on described
In the extended field of two messages.
The packet loss detection device of 13. 1 kinds of multicast services, it is characterised in that include receive unit, the second statistic unit and
Determine unit, wherein:
Described reception unit, for receiving the first message that the first network element is issued, carries multicast group mark in described first message
Knowledge, initial time and termination time, described multicast identifier, described initial time and described termination time are sent to institute
State the second statistic unit；
Described second statistic unit, for adding up the second network element local reception in described initial time to described termination time
Second quantity of the designated multicast data message arrived；Described designated multicast data message refers to what described multicast identifier indicated
Multicast data message in multicast group；It is sent to described second quantity described determine unit；
Described reception unit is additionally operable to: receives the second message that described first network element is issued, carries institute in described second message
State the first quantity of designated multicast data message, be sent to described first quantity described determine unit；Described first quantity
Refer to that described first network element adds up, in described initial time to described termination time, the institute that described first network element local reception is arrived
State the quantity of designated multicast data message；Described determine unit, for true according to described first quantity and described second quantity
Fixed described second network element local reception to described designated multicast data message whether occur packet loss, described first network element to be the
The upstream network element of two network elements.
14. devices according to claim 13, it is characterised in that determine unit specifically for:
Calculate described first quantity and the difference of described second quantity, it is judged that whether described difference is not less than difference threshold；
If described difference is not less than difference threshold, determine the described designated multicast data that described second network element local reception is arrived
Message generation packet loss；
If described difference is less than difference threshold, determine the described designated multicast datagram that described second network element local reception is arrived
There is not packet loss in literary composition.
15. devices according to claim 13, it is characterised in that described device also includes alignment unit, wherein
Described reception unit is additionally operable to: before receiving described first message, receives the time parameter that described first network element is issued,
Described time parameter is sent to described alignment unit；
Described alignment unit, for carrying out clock alignment according to described time parameter.
16. devices according to claim 14, it is characterised in that described device also includes alignment unit, wherein
Described reception unit is additionally operable to: before receiving described first message, receives the time parameter that described first network element is issued,
Described time parameter is sent to described alignment unit；
Described alignment unit, for carrying out clock alignment according to described time parameter.
17. according to the device described in any one of claim 13 to 16, it is characterised in that also include:
Report unit, for reporting described multicast identifier and the Bridge Address of described second network element.
18. devices according to claim 13, it is characterised in that described first message and described second message are equal
For Internet Group Management Protocol query message, when described multicast identifier, initial time and termination that described first message carries
Between be carried in the extended field of described first message, described first quantity that described second message carries is carried on described
In the extended field of two messages.
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| CN104579834B (en) * | 2014-12-31 | 2018-01-05 | 武汉中元华电科技股份有限公司 | A kind of method that forward-path is constructed in power system |
| CN105828218B (en) * | 2016-04-19 | 2019-06-11 | 华为技术有限公司 | A kind of method, apparatus and system detecting multicast data flow transmission quality |
| CN108075941B (en) * | 2016-11-17 | 2021-08-20 | 华为技术有限公司 | Method, sending device and system for detecting service flow performance |
| CN116208525A (en) * | 2018-06-06 | 2023-06-02 | 华为技术有限公司 | Method, equipment and system for detecting data message |
| CN112152898B (en) * | 2019-06-28 | 2021-07-20 | 华为技术有限公司 | Multicast tunnel detection method, device and system |
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| CN102035794A (en) * | 2009-09-29 | 2011-04-27 | 中兴通讯股份有限公司 | Method and system for transmitting and receiving synchronizing sequence of multimedia broadcast multicast service |
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| CN101616037A (en) * | 2009-07-27 | 2009-12-30 | 华为技术有限公司 | The detection method of packet loss, Apparatus and system in the network service |
| CN102035794A (en) * | 2009-09-29 | 2011-04-27 | 中兴通讯股份有限公司 | Method and system for transmitting and receiving synchronizing sequence of multimedia broadcast multicast service |
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