CN101583150A - Method and device for detecting abnormity of wireless terminal through wireless access point - Google Patents
Method and device for detecting abnormity of wireless terminal through wireless access point Download PDFInfo
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- CN101583150A CN101583150A CNA2009101500263A CN200910150026A CN101583150A CN 101583150 A CN101583150 A CN 101583150A CN A2009101500263 A CNA2009101500263 A CN A2009101500263A CN 200910150026 A CN200910150026 A CN 200910150026A CN 101583150 A CN101583150 A CN 101583150A
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Abstract
The invention discloses a method and a device for detecting the abnormity of a wireless terminal through a wireless access point. The method includes the following steps: the wireless access point detects the failure rate of unicast messages sent to the wireless terminal in business process at real time and determines the wireless terminal as an abnormal user if the failure rate of unicast messages sent to the wireless terminal is detected to continuously exceed the predetermined upper limit in a period of time. The invention can not only accurately detect the abnormal situations, for example, caused by the reason that the wireless terminal exceeds the coverage range of wireless network, and the like, but also shorten detection time and take necessary steps in time. Therefore, the method and the device can avoid the blockage of a wireless channel caused by an abnormity, reduce the influence on other wireless users to the minimum degree and avoid faulty operation simultaneously.
Description
Technical field
The present invention relates to WLAN (wireless local area network) provides service simultaneously and reduces interactional method between the subscriber equipment for the multi-user, relates in particular to the method and the device of the detecting abnormity of wireless terminal through wireless access point in the WLAN (wireless local area network).
Background technology
A plurality of wireless terminals and same WAP (wireless access point) (AP in the WLAN (wireless local area network), Access Point) forms a finite element network, and WAP (wireless access point) can be segmented a plurality of virtual radio access points (VAP, VirtualAccess Point), and different VAP can carry different business.If the wireless terminal that one of them VAP hangs down occurs unusual, such as the abnormity of wireless terminal off-line (because of abnormal power-down etc.), perhaps wireless terminal has exceeded the wireless network coverage, or the like.Because WAP (wireless access point) can't normally detect this unusual of wireless terminal, makes WAP (wireless access point) continue this wireless user's of transmission service message.Because the retransmission features of wireless network, the unicast message of this wireless terminal can be retransmitted by WAP (wireless access point) and send, and can cause whole wireless bandwidth seriously to be blocked at last, thereby influence other wireless users' business.
In the network of WLAN (wireless local area network), for example have a wireless access point AP as Fig. 1, (STA Station), inserts on the Internet for wired mouthful by the AP side to hang with a plurality of wireless terminals under this AP.The different radio user can move different business, as getting online without being tethered to a cable, and wireless IPTV program request/multicast (being video request program) business, the Wi-Fi phone is by file transfer protocol (FTP) (FTP, File Transmission Protocol) downloading service etc.Under normal circumstances, the different radio user shares wireless bandwidth, and miscellaneous service is normally operation all.When certain wireless terminal occurs unusual, as the abnormal power-down off-line, perhaps itself since the position move and exceeded wireless network effective coverage range etc., if WAP (wireless access point) can not fast detecting arrive this abnormal conditions, then can retransmit this wireless user's service message, finally cause wireless bandwidth to be blocked for a long time.
Generally, WAP (wireless access point) adopts natural aging mechanism to carry out the detection of abnormity of wireless terminal, whether main thought is to detect wireless terminal to have message to send to this WAP (wireless access point) in a period of time, if there is not message transmissions, it is unusual to think that then this wireless terminal occurs.The shortcoming of this method is that the ageing time that needs is grown (usually about 5 minutes), otherwise can cause misoperation.
Chinese patent
CN200610159659Disclosed a kind of method for quick of Wireless LAN IP multicast transmission anomaly, solved the quick judgement of wireless user to a certain extent because of the abnormal power-down off-line, thinking that the unicast message that mails to this wireless terminal in the case all sends failure, is basis for estimation with continuous transmission failure message number therefore.Though this method shortens the detection time (in 5 seconds) of abnormity of wireless terminal greatly, but, still there is defective in this method under following two kinds of situations: the one, work as the edge that the wireless terminal that is in association status (promptly online) is in the wireless network coverage, packet sends still certain success rate, if the number (promptly whole) with continuous failure message is added up, then possibly can't detect the unusual of this wireless terminal, and the non-constant of the user experience of this wireless terminal user, and greatly influenced other wireless users, therefore the abnormality detection of this wireless terminal must have been come out handle.The 2nd, because surrounding environment tends to occur the strong interference of burst, can cause whole failures of wireless transmission at short notice, if judge with the number of continuous bust this message merely, misoperation can appear.
Therefore existing WLAN (wireless local area network) detects the unusual method of wireless user and demands urgently improving.
Summary of the invention
Technical problem to be solved by this invention provides a kind of WLAN (wireless local area network) and detects unusual method and the device of wireless user, can detect the unusual of the wireless terminal that is in the wireless network coverage edge real-time and accurately, so that in time it is handled.
In order to solve the problems of the technologies described above, the invention provides a kind of method of detecting abnormity of wireless terminal through wireless access point, comprising:
WAP (wireless access point) detects the mortality of the unicast message that mails to wireless terminal in the business procedure in real time, exceed preset upper limit continuously if in a period of time, monitor the mortality of the unicast message that mails to this wireless terminal, then this wireless terminal is judged to be abnormal user.
Further, also comprise before in WAP (wireless access point) detects business procedure, mailing to the mortality of unicast message of wireless terminal:
WAP (wireless access point) receives the association request of wireless terminal, writes down the information of this wireless terminal, determines the number of retransmissions of unicast message according to the business of wireless terminal requests association, and according to the upper limit of the mortality of the predetermined unicast message of number of retransmissions of this unicast message.
Further, if the described mortality that monitors the unicast message that mails to this wireless terminal in a period of time exceeds preset upper limit continuously and is meant: in official hour, exceed preset upper limit if monitor the mortality of the unicast message that mails to this wireless terminal, then unusual number of times is added up, the unusual number of times of accumulative total reaches a threshold value continuously; Mail to the mortality of the unicast message of this wireless terminal, equal to mail to the percentage of failure sum and the ratio of the sum of the unicast message that mails to this wireless terminal of the unicast message of this wireless terminal.
Further, in official hour,, monitoring do not exceed preset upper limit, then the unusual number of times of zero clearing if mailing to the mortality of the unicast message of this wireless terminal.
Further, this method also comprises:
Stop continuing to send unicast message, and delete this wireless terminal to the wireless terminal that is judged as abnormal user.
Further, this method also comprises: send to the wireless terminal that is judged as abnormal user and remove related message.
In order to solve the problems of the technologies described above, the invention provides a kind of device that wireless access point device detects abnormity of wireless terminal that is used for, comprise that interconnective message sends mortality detection module and abnormal user monitoring modular; Wherein:
Message sends the mortality detection module, is used for detecting the mortality that business procedure mails to the unicast message of wireless terminal in real time, and exports to the abnormal user monitoring modular;
The abnormal user monitoring modular was used for exceeding the predetermined upper limit continuously if monitor the mortality of the unicast message that mails to wireless terminal in a period of time, then this wireless terminal was judged to be abnormal user.
Further, this device also comprises respectively with message and sends the wireless terminal relating module that the mortality detection module is connected with the abnormal user monitoring modular, wherein:
The wireless terminal relating module, be used to receive the association request of wireless terminal, and write down the information of this wireless terminal, determine the number of retransmissions of unicast message according to the business of wireless terminal requests association, and the number of retransmissions of the unicast message determined is exported to message send the mortality detection module;
Message sends the mortality detection module, also is used for the higher limit according to the mortality of the predetermined described unicast message that mails to wireless terminal of the number of retransmissions of the unicast message of input, and exports to the abnormal user monitoring modular; Mail to the mortality of the unicast message of this wireless terminal, equal to mail to the percentage of failure sum and the ratio of the sum of the unicast message that mails to this wireless terminal of the unicast message of this wireless terminal;
The abnormal user monitoring modular, in official hour, exceed preset upper limit if monitor the mortality of the unicast message that mails to this wireless terminal, then unusual number of times is added up, otherwise this unusual number of times of zero clearing, if the unusual number of times of accumulative total reaches a threshold value continuously, then this wireless terminal is judged to be abnormal user.
Further,
The abnormal user monitoring modular also is used for the information that is judged to the wireless terminal of abnormal user is exported to the wireless terminal relating module;
The wireless terminal relating module also is used for the information of the wireless terminal that is judged to abnormal user that returns according to the abnormal user monitoring modular, stops continuing to send unicast message to this wireless terminal, and deletes this wireless terminal.
Further,
The wireless terminal relating module also is used for removing related message to the wireless terminal transmission that is judged as abnormal user.
The present invention sends the statistics and the calculating of unicast message mortality to its wireless terminal of hanging down by WAP (wireless access point), mortality is exceeded the wireless terminal that the predetermined upper limit and its number of times reach predetermined threshold be considered as abnormal user, all messages that will mail to this wireless terminal user thus all abandon, and remove related message to this wireless terminal transmission, so both can detect exactly and to have comprised wireless terminal owing to exceeded the abnormal conditions that wireless network coverage etc. causes, and shortened detection time and can in time take measures necessary, therefore can avoid blocking because of the wireless channel that causes unusually, to drop to minimum level to other wireless users' influence, also can avoid misoperation simultaneously.The present invention is more flexible in operation compared with prior art, can carry out each parameter regulation at different applied environments, to reach the purpose that quick and precisely detects unusual wireless terminal.
Description of drawings
Fig. 1 is the network system architecture schematic diagram of WLAN (wireless local area network);
Fig. 2 is an embodiment of the invention method flow diagram;
Fig. 3 detects the flow chart that mails to wireless terminal list packet voice mortality in the embodiment of the invention method;
Fig. 4 is a flow chart of judging abnormity of wireless terminal in the embodiment of the invention method according to testing result;
Fig. 5 is the structured flowchart of the device of the detection abnormity of wireless terminal of the invention process in wireless access point device.
Embodiment
The method of detecting abnormity of wireless terminal through wireless access point provided by the invention and device, its inventive concept is, drawback at existing abnormity of wireless terminal detection method, WAP (wireless access point) is sent the mortality of unicast message as the basic parameter that detects abnormity of wireless terminal to wireless terminal, the wireless terminal that on this basis the mortality continuous several times is exceeded the predetermined upper limit is judged as abnormal user, all messages that will mail to this wireless terminal in view of the above all abandon, and remove related message to this wireless terminal transmission.The multiple abnormal terminals that can be in association with comprising like this but be in the wireless network coverage edge detects accurately and rapidly, can avoid and/or retrieve simultaneously the misoperation that the interference because of the surrounding environment burst causes.
At length set forth out technical scheme of the present invention below in conjunction with accompanying drawing and preferred embodiment.The embodiment that below exemplifies only is used for description and interpretation the present invention, and does not constitute the restriction to technical scheme of the present invention.
As shown in Figure 2, be the method flow of the WLAN (wireless local area network) detection abnormity of wireless terminal of the embodiment of the invention, implement by WAP (wireless access point), comprise the steps:
210: detect the mortality that mails to the unicast message of wireless terminal in the business procedure;
This mortality=(sum that the failure sum that unicast message sends/unicast message sends) * 100%
220: the mortality that the unicast message of wireless terminal is mail in continuous monitoring in a period of time exceeds the unusual number of times of the predetermined upper limit, and the wireless terminal that unusual number of times exceeds predetermined threshold continuously is judged to be abnormal user;
Need to be scheduled to according to wireless traffic in advance the upper limit of mortality.For example for the high business of some reliability requirements, its number of retransmissions can be provided with higher, and thus, its mortality upper limit then will be scheduled to lowly.Vice versa.
230: stop the transmission of continuation, and delete this wireless terminal to this abnormal user message;
240: go related message, process ends to this wireless terminal transmission.
For preventing misoperation, WAP (wireless access point) sends to this abnormal terminals and removes related message.If it is this wireless terminal can normally receive this and remove related message, can be again related and proceed its wireless traffic.
The present invention is very flexible in operation, can carry out the adjusting of each parameter at different applied environments, such as the mortality upper limit, unusual number of times etc., to reach the purpose that quick and precisely detects unusual wireless user, correctly handle this wireless user's data interaction on this basis, thereby drop to the influence to other wireless users minimum.
As shown in Figure 3, be the method flow that step 210 detects the mortality of the unicast message that mails to wireless terminal in the business procedure among Fig. 2, comprise the steps:
2101,2102: when wireless terminal requests is related, receives related and write down the relevant information of this terminal;
2103: determine the message number of retransmissions according to business, and preset the message transmission mortality upper limit in view of the above;
WAP (wireless access point) is determined the message number of retransmissions according to the business of wireless terminal requests association, and presets the message transmission mortality upper limit according to the message number of retransmissions of determining; Simultaneously can also preset unusual frequency threshold value, perhaps use the unusual frequency threshold value of an acquiescence.
2104: when the unicast packet message that sends to this wireless terminal was arranged in the business procedure, the accumulative total message sent sum;
2105: whether the transmission of judging this message fails, and is execution in step 2106 then, carries out otherwise return step 2104;
WAP (wireless access point) judges whether the transmission of message fails, according to the acknowledgement frame of whether correctly receiving the other side (ACK, ACKnowledgement).If WAP (wireless access point) is not still received the other side's acknowledgement frame after number of retransmissions reaches the upper limit, think that then this message sends failure.
2106: the accumulative total unicast message sends the failure sum, and calculates the mortality that unicast message sends, and returns step 2104 and carries out.
That is to say that at the wireless terminal business procedure from start to finish, the mortality that WAP (wireless access point) all can send this terminal unicast message incessantly carries out detection of dynamic, until its service ending.In this process, the mortality that unicast message sends may fluctuate in real time, and WAP (wireless access point) is carried out the monitoring of abnormal conditions according to the mortality data that detect in real time in a period of time to this wireless terminal.
As shown in Figure 4, be the method flow of step 220 among Fig. 2, promptly WAP (wireless access point) comprises the steps: according to the idiographic flow of the unusual wireless terminal of the mortality data monitoring appearance that detects in real time
2201: timer regularly triggers;
WAP (wireless access point) can be provided with a timer for the related wireless terminal of each request, and presets the timing (for example presetting 1 second) of this timer.Whenever the timing of this timer then, can trigger automatically and entering this flow process.
2202: judging whether the mortality that the message that detects in real time sends surpasses the upper limit that presets, is execution in step 2203 then, otherwise execution in step 2206;
2203: the unusual number of times to this wireless terminal adds up;
2204: judging that whether unusual number of times surpasses threshold value, is execution in step 2205 then, otherwise process ends;
2205: this wireless terminal is labeled as abnormal user, process ends;
2206: to the unusual number of times zero clearing of this wireless terminal, process ends.
That is to say that WAP (wireless access point) (timing that promptly presets) at set intervals will judge whether to transfinite to the mortality that the message of real-time detection sends, as transfinite and to add up unusual number of times once; The mortality that sends when continuous several (for example 3 times) message all transfinites, and then this wireless terminal is judged to be abnormal user.Obviously, do the misoperation that to avoid the interference because of surrounding environment burst to cause like this.This shows that present embodiment approximately can just accurately, promptly detect unusual wireless terminal in 3 seconds.
As shown in Figure 5, be the structure of the device of the detection abnormity of wireless terminal of the invention process in wireless access point device, this device 500 comprises that the wireless terminal relating module 510, the message that connect successively send mortality detection module 520 and abnormal user monitoring modular 530; Wherein:
Wireless terminal relating module 510 is used to receive the association request of wireless terminal, and writes down the relevant information of this terminal, determines the message number of retransmissions according to business, and the message number of retransmissions of determining is exported to message transmission mortality detection module 520; The information of the wireless terminal that is judged as abnormal user that returns according to abnormal user monitoring modular 530 stops continuing to send unicast message to this wireless terminal, and deletes this wireless terminal, and sends to this wireless terminal and to remove related message.
Message sends mortality detection module 520, be used for sending the mortality upper limit and unusual frequency threshold value (also can Use Defaults) according to the predetermined message of the message number of retransmissions of input, in business procedure, detect the mortality that (by statistics and calculate) mails to the unicast message of wireless terminal in real time, and mortality, the predetermined message of the unicast message that detects sent the mortality upper limit and unusual frequency threshold value is exported to abnormal user monitoring modular 530.
Abnormal user monitoring modular 530, also be connected with wireless terminal relating module 510, be used for the mortality according to the unicast message of input, the predetermined message transmission mortality upper limit and unusual frequency threshold value, the mortality that the unicast packet message of wireless terminal is mail in continuous monitoring in a period of time exceeds the unusual number of times of the predetermined upper limit, and the wireless terminal that unusual number of times exceeds predetermined threshold continuously is judged to be abnormal user, and the information that will be judged to be the wireless terminal of abnormal user returns to wireless terminal relating module 510.
Above embodiment is verified on actual products, the abnormal conditions that abnormal power-down occurs or exceed wireless network coverage (also comprise and be in the wireless network coverage edge) at wireless terminal can detect quickly and accurately, and in time stop retransmitting message to abnormal user, drop to the influence to other wireless users minimum.Because the common time of bursty interference is all extremely short, the above embodiment of the present invention does not all deal with, thus the misoperation that can avoid bursty interference to cause, and by going related message further to avoid possible misoperation to the abnormal user transmission.
Claims (10)
1, a kind of method of detecting abnormity of wireless terminal through wireless access point comprises:
WAP (wireless access point) detects the mortality of the unicast message that mails to wireless terminal in the business procedure in real time, exceed preset upper limit continuously if in a period of time, monitor the mortality of the unicast message that mails to this wireless terminal, then this wireless terminal is judged to be abnormal user.
2, in accordance with the method for claim 1, it is characterized in that, also comprise before in WAP (wireless access point) detects business procedure, mailing to the mortality of unicast message of wireless terminal:
Described WAP (wireless access point) receives the association request of wireless terminal, write down the information of this wireless terminal, determine the number of retransmissions of unicast message according to the business of described wireless terminal requests association, and according to the upper limit of the mortality of the predetermined described unicast message of number of retransmissions of described unicast message.
3, in accordance with the method for claim 2, it is characterized in that, if the described mortality that monitors the unicast message that mails to this wireless terminal in a period of time exceeds preset upper limit continuously and is meant: in official hour, exceed described preset upper limit if monitor the mortality of the unicast message that mails to this wireless terminal, then unusual number of times is added up, the unusual number of times of accumulative total reaches a threshold value continuously; The described mortality that mails to the unicast message of this wireless terminal equals to mail to the percentage of failure sum and the ratio of the sum of the unicast message that mails to this wireless terminal of the unicast message of this wireless terminal.
4, in accordance with the method for claim 3, it is characterized in that, in official hour, do not exceed described preset upper limit, then the described unusual number of times of zero clearing if the mortality of the unicast message of this wireless terminal is mail in monitoring.
5, according to each described method of claim 1 to 4, it is characterized in that, also comprise:
The described wireless terminal that stops continuing to being judged as abnormal user sends unicast message, and deletes this wireless terminal.
6, in accordance with the method for claim 5, it is characterized in that, also comprise: send to the described wireless terminal that is judged as abnormal user and remove related message.
7, a kind of device that is used for wireless access point device detection abnormity of wireless terminal comprises that interconnective message sends mortality detection module and abnormal user monitoring modular; Wherein:
Described message sends the mortality detection module, is used for detecting the mortality that business procedure mails to the unicast message of wireless terminal in real time, and exports to the abnormal user monitoring modular;
Described abnormal user monitoring modular was used for exceeding the predetermined upper limit continuously if monitor the mortality of the unicast message that mails to wireless terminal in a period of time, then this wireless terminal was judged to be abnormal user.
8, according to the described device of claim 7, it is characterized in that, also comprise respectively sending the wireless terminal relating module that the mortality detection module is connected with described abnormal user monitoring modular with described message, wherein:
Described wireless terminal relating module, be used to receive the association request of wireless terminal, and write down the information of this wireless terminal, determine the number of retransmissions of unicast message according to the business of described wireless terminal requests association, and the number of retransmissions of the described unicast message that will determine is exported to described message and is sent the mortality detection module;
Described message sends the mortality detection module, also is used for the higher limit according to the mortality of the predetermined described unicast message that mails to wireless terminal of the number of retransmissions of the described unicast message of input, and exports to described abnormal user monitoring modular; The described mortality that mails to the unicast message of this wireless terminal equals to mail to the percentage of failure sum and the ratio of the sum of the unicast message that mails to this wireless terminal of the unicast message of this wireless terminal;
Described abnormal user monitoring modular, in official hour, exceed described preset upper limit if monitor the mortality of the unicast message that mails to this wireless terminal, then unusual number of times is added up, otherwise the described unusual number of times of zero clearing, if the unusual number of times of accumulative total reaches a threshold value continuously, then this wireless terminal is judged to be abnormal user.
9, according to the described device of claim 8, it is characterized in that,
Described abnormal user monitoring modular also is used for the information that is judged to the wireless terminal of abnormal user is exported to described wireless terminal relating module;
Described wireless terminal relating module also is used for the information of the wireless terminal that is judged to abnormal user that returns according to described abnormal user monitoring modular, stops continuing to send unicast message to this wireless terminal, and deletes this wireless terminal.
10, according to the described device of claim 9, it is characterized in that,
Described wireless terminal relating module also is used for removing related message to the described wireless terminal transmission that is judged as abnormal user.
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