CN106850351A - The approximate delay statistics method and device of http business under a kind of asymmetric link environment - Google Patents
The approximate delay statistics method and device of http business under a kind of asymmetric link environment Download PDFInfo
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- CN106850351A CN106850351A CN201710072581.3A CN201710072581A CN106850351A CN 106850351 A CN106850351 A CN 106850351A CN 201710072581 A CN201710072581 A CN 201710072581A CN 106850351 A CN106850351 A CN 106850351A
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- 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
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
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- 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
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
- H04L43/0864—Round trip delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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Abstract
The invention discloses the approximate delay statistics method and device of http business under a kind of asymmetric link environment, solve at present due to routing policy, situation of the up-downgoing message by different link transmissions occurs, when computer room of different of the both links in outlet, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, bill record collection is had undesirable effect, partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely.Net outlet is particularly saved, asymmetric case becomes apparent.When in HTTP link message request direction message or response direction message, the caused technical problem that HTTP service delay indexs cannot be calculated according to above-mentioned algorithm.
Description
Technical field
The present invention relates to the approximate time delay of http business under field of computer technology, more particularly to a kind of asymmetric link environment
Statistical method and device.
Background technology
DPI (Deep Packet Inspection) equipment is entered by the flow and message content at the key point to network
Detection flows can be carried out filtering control, the business of link where completing by row detection and analysis according to the strategy of predefined
Become more meticulous identification, the analysis of service traffics flow direction, service traffics accounting statistics, the shaping of business accounting and application layer refusal service
Attack, filtered and abused the functions such as the control of P2P to virus, wooden horse.Unified DPI refers to a set of DPI equipment on link
Flow is acquired and is distributed to each third-party application with identification, and flow or analysis statisticaling data needed for meeting other systems
System server.The related application system of all kinds of traffic managements in network, flows control, the inspection of Web Cache, unlawful VoIP between such as netting
Survey, internet log retention etc., are mainly made up of DPI equipment and application server.Wherein, DPI equipment is responsible for data acquisition, flow
Analytic statistics, daily record synthesis, the further analyzing and processing of the main complete paired data of application server, rationalization and storage number
According to, and presented.Unified DPI incorporates the DPI equipment of multiple third-party application systems, and multiple systems are multiplexed with by DPI
DPI abilities are provided.
In computer room link deployment DPI equipment, the message to passing through is identified and generates ticket.Message in HTTP link
After being mirrored and being sent to data acquisition software, the timestamp that can be reached according to all kinds of messages in data acquisition software be calculated
Http business associated time delays indexs.For http business associated time delays fields and computational methods：First http response packet delay：
In first time HTTP request, the time delay of first descending ACK message after GET request message to GET messages；Last HTTP
The time delay of content bag：Time delay of the content bag of last burst to the ack bags of response get；Last ACK confirm bag when
Prolong：Penultimate ACK reports for work the time delay of GET.
Due to routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are in outlet
Different computer room when, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, talks with
Single collection has undesirable effect, and partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely.
Net outlet is particularly saved, asymmetric case becomes apparent.When in HTTP link message request direction message or response direction
Message, result in the technical problem that HTTP service delay indexs cannot be calculated according to above-mentioned algorithm.
The content of the invention
The approximate delay statistics method and device of http business under a kind of asymmetric link environment is the embodiment of the invention provides,
Solve at present due to routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are going out
Mouthful different computer room when, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, right
Bill record collection has undesirable effect, and partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely
Deng.Net outlet is particularly saved, asymmetric case becomes apparent.As in HTTP link message request direction message or responder
To message, the caused technical problem that HTTP service delay indexs cannot be calculated according to above-mentioned algorithm.
The approximate delay statistics method of http business under a kind of asymmetric link environment provided in an embodiment of the present invention, including：
S1：Direction type of message to being asked in HTTP link judges, if uplink message, then performs step S2,
If downlink message, then step S3 is performed；
S2：The judgement of delay packet is carried out, if first http response packet delay, then the after GET response messages is calculated
One uplink ACK if the time delay of last HTTP content bag, then calculates second request to the time delay of GET request message
Message is to first time delay of request message；
S3：Calculate second response bag to first time delay of response bag.
Alternatively, first uplink ACK after GET response messages is calculated to be specifically included to the time delay of GET request message：
Carry out approximate substitution using first uplink ACK message after GET response messages, and after calculating GET response messages
Time delay of first uplink ACK to GET request message.
Alternatively, second request message is calculated to be specifically included to the time delay of first request message：
Carry out approximate substitution using second request message and first request message, and calculate second request message to the
One time delay of request message.
Alternatively, S3 is specifically included：
Carry out approximate substitution using second response bag and first response bag, and calculate second response bag to first sound
The time delay that should be wrapped.
Alternatively, carry out approximate substitution using second response bag and first response bag, and calculate second response bag to arrive
The time delay of first response bag is specifically included：
When it is determined that the time delay of last ACK confirmation bags, then come approximate using second response bag and first response bag
Substitute, and calculate second response bag to first time delay of response bag.
The approximate delay statistics device of http business under a kind of asymmetric link environment provided in an embodiment of the present invention, including：
First judging unit, for judging the direction type of message asked in HTTP link, if uplink message,
The second judging unit is then triggered, if downlink message, then the 3rd time delay elements is triggered；
Second judging unit, the judgement for carrying out delay packet, if first http response packet delay, then trigger first
Time delay elements, if the time delay of last HTTP content bag, then trigger the second time delay elements；
First time delay elements, for calculating first uplink ACK after GET response messages to the time delay of GET request message；
Second time delay elements, for calculating second request message to first time delay of request message；
3rd time delay elements, for calculating second response bag to first time delay of response bag.
Alternatively, the first time delay elements, specifically for coming near using first uplink ACK message after GET response messages
Like replacement, and calculate first uplink ACK after GET response messages to the time delay of GET request message.
Alternatively, the second time delay elements, specifically for coming approximate using second request message and first request message
Substitute, and calculate second request message to first time delay of request message.
Alternatively, the 3rd time delay elements, specifically for carrying out approximate substitution using second response bag and first response bag,
And calculate second response bag to first time delay of response bag.
Alternatively, the 3rd time delay elements, specifically for when the time delay for determining last ACK confirmation bags, then using second
Individual response bag and first response bag carry out approximate substitution, and calculate second response bag to first time delay of response bag.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
The approximate delay statistics method and device of http business under a kind of asymmetric link environment provided in an embodiment of the present invention,
Wherein, the approximate delay statistics method of http business includes under asymmetric link environment：S1：To the direction report asked in HTTP link
Literary type is judged, if uplink message, then performs step S2, if uplink message, then performs step S3；S2：Carry out when
The judgement of Yan Bao, if first http response packet delay, then calculating first uplink ACK after GET response messages please to GET
The time delay of message is sought, if the time delay of last HTTP content bag, then second request message to first request report is calculated
The time delay of text；S3：Calculate second response bag to first time delay of response bag.In the present embodiment, by HTTP link
The direction type of message of request is judged, if uplink message, then carries out the judgement of delay packet, if first http response
Packet delay, then calculate first uplink ACK after GET response messages to the time delay of GET request message, if last HTTP
The time delay of content bag, then calculate second request message to first time delay of request message, if downlink message, then calculates the
Two response bags are solved at present due to routing policy to first time delay of response bag, it may appear that up-downgoing message is not by
With the situation of link transmission, when computer room of different of the both links in outlet, the message for reaching DPI equipment just occurs only
The situation of uplink message or only downlink message, has undesirable effect to bill record collection, and partial service information is not complete, time delay index
Cannot calculate, partial service cannot be recognized precisely.Net outlet is particularly saved, asymmetric case becomes apparent.Work as HTTP link
Interior message request direction message or response direction message, it is caused that HTTP service delays cannot be calculated according to above-mentioned algorithm
The technical problem of index.
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, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the approximate delay statistics method of http business under a kind of asymmetric link environment provided in an embodiment of the present invention
The schematic flow sheet of one embodiment；
Fig. 2 is the approximate delay statistics method of http business under a kind of asymmetric link environment provided in an embodiment of the present invention
The schematic flow sheet of another embodiment；
Fig. 3 is the approximate delay statistics device of http business under a kind of asymmetric link environment provided in an embodiment of the present invention
The structural representation of one embodiment.
Specific embodiment
The approximate delay statistics method and device of http business under a kind of asymmetric link environment is the embodiment of the invention provides,
Solve at present due to routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are going out
Mouthful different computer room when, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, right
Bill record collection has undesirable effect, and partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely
Deng.Net outlet is particularly saved, asymmetric case becomes apparent.As in HTTP link message request direction message or responder
To message, the caused technical problem that HTTP service delay indexs cannot be calculated according to above-mentioned algorithm.
To enable that goal of the invention of the invention, feature, advantage are more obvious and understandable, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described, it is clear that disclosed below to the technical scheme in the embodiment of the present invention
Embodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this area
All other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
Refer to Fig. 1, the approximate delay statistics of http business under a kind of asymmetric link environment provided in an embodiment of the present invention
One embodiment of method includes：
S1, the direction type of message to being asked in HTTP link judge, if uplink message, then perform step S2,
If downlink message, then step S3 is performed；
In the present embodiment, when http business carries out approximate delay statistics under needing to asymmetric link environment, need first
The direction type of message asked in HTTP link is judged, if uplink message, then step S2 be performed, if descending report
Text, then perform step S3.
S2, the judgement for carrying out delay packet, if first http response packet delay, then calculate the after GET response messages
One uplink ACK if the time delay of last HTTP content bag, then calculates second request to the time delay of GET request message
Message is to first time delay of request message；
When the direction type of message asked in HTTP link is uplink message, then need to carry out the judgement of delay packet, if
First http response packet delay, then calculate first uplink ACK after GET response messages to the time delay of GET request message, if
It is the time delay of last HTTP content bag, then calculates second request message to first time delay of request message.
S3, second response bag of calculating to first time delay of response bag.
When the direction type of message asked in HTTP link is downlink message, then second response bag to first sound is calculated
The time delay that should be wrapped.
In the present embodiment, judge by the direction type of message asked in HTTP link, if uplink message, then
The judgement of delay packet is carried out, if first http response packet delay, then first uplink ACK after GET response messages is calculated
To the time delay of GET request message, if the time delay of last HTTP content bag, then second request message is calculated to first
The time delay of request message, if downlink message, then calculates second response bag to first time delay of response bag, solves at present
Due to routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are in the different of outlet
During computer room, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, and bill record collection is made
Into harmful effect, partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely.Particularly save
Net outlet, asymmetric case becomes apparent.When in HTTP link message request direction message or response direction message, cause
The technical problem that HTTP service delay indexs cannot be calculated according to above-mentioned algorithm.
The above is the description carried out to the process of the approximate delay statistics method of http business under asymmetric link environment, below
Detailed process will be described in detail, Fig. 2 be referred to, under a kind of asymmetric link environment provided in an embodiment of the present invention
Another embodiment of the approximate delay statistics method of http business includes：
201st, the direction type of message asked in HTTP link is judged, if uplink message, then performs step
202, if downlink message, then perform step 205；
In the present embodiment, when http business carries out approximate delay statistics under needing to asymmetric link environment, need first
The direction type of message asked in HTTP link is judged, if uplink message, then step 202 be performed, if descending
Message, then perform step 205.
202nd, the judgement of delay packet is carried out, if first http response packet delay, then step 203 is performed, if finally
One time delay of HTTP content bags, then perform step 204；
When the direction type of message asked in HTTP link is uplink message, then need to carry out the judgement of delay packet, if
First http response packet delay, then calculate first uplink ACK after GET response messages to the time delay of GET request message, if
It is the time delay of last HTTP content bag, then calculates second request message to first time delay of request message.
203rd, carry out approximate substitution using first uplink ACK message after GET response messages, and calculate GET response messages
Time delay of first uplink ACK afterwards to GET request message；
When the judgement for carrying out delay packet is first http response packet delay, then first after GET response messages is used
Uplink ACK message carrys out approximate substitution, and calculates first uplink ACK after GET response messages to the time delay of GET request message.
204th, carry out approximate substitution using second request message and first request message, and calculate second request message
To first time delay of request message；
When the judgement for carrying out delay packet is the time delay of last HTTP content bag, then second request message and the are used
One request message carrys out approximate substitution, and calculates second request message to first time delay of request message.
205th, carry out approximate substitution using second response bag and first response bag, and calculate second response bag to first
The time delay of individual response bag.
When the direction type of message asked in HTTP link is downlink message, then second response bag and first sound are used
Should wrap and carry out approximate substitution, and calculate second response bag to first time delay of response bag.
It should be noted that when the time delay for determining last ACK confirmation bags, then using second response bag and first
Response bag carrys out approximate substitution, and calculates second response bag to first time delay of response bag.
It is described with a concrete application scene below, application examples includes：
Situation one：Only uplink message
First http response packet delay：First after GET request message descending ACK message cannot be obtained, is now made
Arrived come first uplink ACK after approximate substitution, i.e. GET response messages with first uplink ACK message after GET response messages
The time delay of GET request message.
The time delay of last HTTP content bag：The content bag of last burst and the ack of response get cannot be obtained
Bag, now carrys out the request message of approximate substitution, i.e., second to first using second request message and first request message
The time delay of request message.
Situation two：Only downlink message
Last ACK confirms the time delay of bag：Penultimate ACK and first GET request bag cannot be obtained, is now made
With second response bag and first response bag come the response bag of approximate substitution, i.e., second to first time delay of response bag.
In the present embodiment, judge by the direction type of message asked in HTTP link, if uplink message, then
The judgement of delay packet is carried out, if first http response packet delay, then first uplink ACK after GET response messages is calculated
To the time delay of GET request message, if the time delay of last HTTP content bag, then second request message is calculated to first
The time delay of request message, if downlink message, then calculates second response bag to first time delay of response bag, solves at present
Due to routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are in the different of outlet
During computer room, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, and bill record collection is made
Into harmful effect, partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely.
Refer to Fig. 3, the approximate delay statistics of http business under a kind of asymmetric link environment provided in an embodiment of the present invention
One embodiment of device includes：
First judging unit 301, for judging the direction type of message asked in HTTP link, if up report
Text, then trigger the second judging unit 302, if downlink message, then triggers the 3rd time delay elements；305
Second judging unit 302, the judgement for carrying out delay packet, if first http response packet delay, then trigger
First time delay elements 303, if the time delay of last HTTP content bag, then trigger the second time delay elements 304；
First time delay elements 303, for calculate first uplink ACK after GET response messages to GET request message when
Prolong, the first time delay elements 303, specifically for carrying out approximate substitution using first uplink ACK message after GET response messages, and
Calculate first uplink ACK after GET response messages to the time delay of GET request message；
Second time delay elements 304, for calculating second request message to first time delay of request message, the second time delay
Unit 304, specifically for carrying out approximate substitution using second request message and first request message, and calculates second request
Message is to first time delay of request message；
3rd time delay elements 305, for calculating second response bag to first time delay of response bag, the 3rd time delay elements
305, specifically for carrying out approximate substitution using second response bag and first response bag, and calculate second response bag to first
The time delay of individual response bag, the 3rd time delay elements 305, specifically for when determining that last ACK confirms the time delay of bag, then using the
Two response bags and first response bag carry out approximate substitution, and calculate second response bag to first time delay of response bag.
In the present embodiment, the direction type of message asked in HTTP link is judged by the first judging unit 301,
If uplink message, then the second judging unit 302 carries out the judgement of delay packet, if first http response packet delay, then
One time delay elements 303 calculate first uplink ACK after GET response messages to the time delay of GET request message, if last
The time delay of HTTP content bags, then the second time delay elements 304 calculate second request message to first time delay of request message, if
Be downlink message, then the 3rd time delay elements 305 calculate second response bag to first time delay of response bag, solve at present by
In routing policy, it may appear that the situation that up-downgoing message passes through different link transmissions, when both links are in the different machine of outlet
Fang Shi, the message for reaching DPI equipment just occurs only uplink message or the only situation of downlink message, and bill record collection is caused
Harmful effect, partial service information is not complete, time delay index cannot be calculated, partial service cannot be recognized precisely.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example multiple units or component
Can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer
Equipment (can be personal computer, the approximate delay statistics server of http business under asymmetric link environment, or the network equipment
Deng) perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium includes：USB flash disk, movement
Hard disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access
Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to preceding
Embodiment is stated to be described in detail the present invention, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of approximate delay statistics method of http business under asymmetric link environment, it is characterised in that including：
S1：Direction type of message to being asked in HTTP link judges, if uplink message, then performs step S2, if
Downlink message, then perform step S3；
S2：The judgement of delay packet is carried out, if first http response packet delay, then first after GET response messages is calculated
Uplink ACK if the time delay of last HTTP content bag, then calculates second request message to the time delay of GET request message
To first time delay of request message；
S3：Calculate second response bag to first time delay of response bag.
2. the approximate delay statistics method of http business under asymmetric link environment according to claim 1, it is characterised in that
First uplink ACK after GET response messages is calculated to be specifically included to the time delay of GET request message：
Carry out approximate substitution using first uplink ACK message after GET response messages, and calculate after GET response messages first
Time delay of the individual uplink ACK to GET request message.
3. the approximate delay statistics method of http business under asymmetric link environment according to claim 2, it is characterised in that
Second request message is calculated to be specifically included to the time delay of first request message：
Carry out approximate substitution using second request message and first request message, and calculate second request message to first
The time delay of request message.
4. the approximate delay statistics method of http business under asymmetric link environment according to claim 3, it is characterised in that
S3 is specifically included：
Carry out approximate substitution using second response bag and first response bag, and calculate second response bag to first response bag
Time delay.
5. the approximate delay statistics method of http business under asymmetric link environment according to claim 4, it is characterised in that
Carry out approximate substitution using second response bag and first response bag, and calculate second response bag to first response bag when
Prolong and specifically include：
When it is determined that last ACK confirm bag time delay, then carry out approximate substitution using second response bag and first response bag,
And calculate second response bag to first time delay of response bag.
6. the approximate delay statistics device of http business under a kind of asymmetric link environment, it is characterised in that including：
First judging unit, for judging the direction type of message asked in HTTP link, if uplink message, then touches
The second judging unit is sent out, if downlink message, then the 3rd time delay elements is triggered；
Second judging unit, the judgement for carrying out delay packet, if first http response packet delay, then trigger the first time delay
Unit, if the time delay of last HTTP content bag, then trigger the second time delay elements；
First time delay elements, for calculating first uplink ACK after GET response messages to the time delay of GET request message；
Second time delay elements, for calculating second request message to first time delay of request message；
3rd time delay elements, for calculating second response bag to first time delay of response bag.
7. the approximate delay statistics device of http business under asymmetric link environment according to claim 6, it is characterised in that
First time delay elements, specifically for carrying out approximate substitution using first uplink ACK message after GET response messages, and calculate GET
The time delay of first uplink ACK after response message to GET request message.
8. the approximate delay statistics device of http business under asymmetric link environment according to claim 6, it is characterised in that
Second time delay elements, specifically for carrying out approximate substitution using second request message and first request message, and calculate second
Individual request message is to first time delay of request message.
9. the approximate delay statistics device of http business under asymmetric link environment according to claim 6, it is characterised in that
3rd time delay elements, specifically for carrying out approximate substitution using second response bag and first response bag, and calculate second sound
Should wrap to first time delay of response bag.
10. the approximate delay statistics device of http business, its feature under the asymmetric link environment according to claim 6 or 8
Be, the 3rd time delay elements, specifically for when determining that last ACK confirms the time delay of bag, then using second response bag and
First response bag carrys out approximate substitution, and calculates second response bag to first time delay of response bag.
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| CN108494774A (en) * | 2018-03-26 | 2018-09-04 | 广东工业大学 | A kind of anti-link control attack method for reinforcing anonymous communication system safety |
| CN111431942A (en) * | 2020-06-10 | 2020-07-17 | 杭州圆石网络安全技术有限公司 | CC attack detection method and device and network equipment |
| CN113542044A (en) * | 2020-04-15 | 2021-10-22 | 中国移动通信集团河北有限公司 | Network quality monitoring method and device and computing equipment |
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| CN113542044A (en) * | 2020-04-15 | 2021-10-22 | 中国移动通信集团河北有限公司 | Network quality monitoring method and device and computing equipment |
| CN111431942A (en) * | 2020-06-10 | 2020-07-17 | 杭州圆石网络安全技术有限公司 | CC attack detection method and device and network equipment |
| CN111431942B (en) * | 2020-06-10 | 2020-09-15 | 杭州圆石网络安全技术有限公司 | CC attack detection method and device and network equipment |
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