CN102833720A - Roaming system selecting access points through wireless access control device and method thereof - Google Patents
Roaming system selecting access points through wireless access control device and method thereof Download PDFInfo
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- CN102833720A CN102833720A CN2011101579183A CN201110157918A CN102833720A CN 102833720 A CN102833720 A CN 102833720A CN 2011101579183 A CN2011101579183 A CN 2011101579183A CN 201110157918 A CN201110157918 A CN 201110157918A CN 102833720 A CN102833720 A CN 102833720A
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Abstract
The invention discloses a roaming system selecting access points through a wireless access control device and a method thereof. Through a technological means that after access points of a mobile device are detected, the signal strength between each access point of the mobile device and the mobile device is transferred to a wireless access control device, and then the wireless access control device instructs the mobile device to select an online access point according to the signal strength between each access point and the mobile device, the network online quality and data transmission efficiency of the mobile device can be considered concurrently, and the technical efficacy of high-speed roaming can be achieved.
Description
Technical field
A kind of roaming system and method thereof are meant a kind of roaming system and method thereof of being selected access point by wireless access control apparatus especially.
Background technology
Roaming (roaming) is meant that (station is STA) in (the institute's generation behavior when Access Point, wireless signal covering scope AP) will switch to the wireless signal covering scope of second access point of first access point when mobile device.
In present roaming technology; Mainly be to utilize the WiFi technology in same channel and in certain particular distance; Different access point can listen to characteristic each other, lets access point can detect the intersection area that mobile device has moved to the wireless signal covering scope of two access points.Wherein, Judge that the practice of confluce that mobile device has moved to the wireless signal covering scope of two access points normally judged by mobile device voluntarily; So the package that mobile device must carry out is to a certain degree collected, so; Mobile device can be selected the best access point of on line quality when confirming on-line state.
Therefore; If will judge on mobile device whether mobile device has moved to the confluce of the wireless signal covering scope of two access points; Then mobile device certainly will want the frequency range (bandwith) of sacrificial section collect and access point between the communication package, this will lower the data transmission efficiency of mobile device.
In sum, can know that prior art has existed mobile device can't take into account the problem of network on-line quality and data transmission efficiency since the midium or long term always, therefore be necessary to propose improved technological means, solve this problem.
Summary of the invention
Because prior art exists mobile device can't take into account the problem of network on-line quality and data transmission efficiency, spy of the present invention provides a kind of roaming system and method thereof by wireless access control apparatus selection access point, wherein:
Roaming system by wireless access control apparatus selection access point provided by the present invention comprises at least: and mobile device (station, STA); (Access Point AP), provides mobile device online to first access point, in order to pass on (forward) first target device that mobile device transmitted registration (Target Station Register) message; Second access point after being used to detect mobile device, transmits target device inquiry (Target Station Query) message, and in order to the signal strength signal intensity between transmission and mobile device; Wireless access control apparatus (Wireless Access Controller; WAC); After being used to receive the target device query messages that second access point transmitted; Transmit monitoring access point registration (Monitor AP Register) message to mobile device through first access point, it is online that the mobile device and second access point are set up, and in order to after judging that signal strength signal intensity meets predefined roaming rule; Transmit roaming and order, make mobile device roam to second access point according to the roaming order to mobile device.
Loaming method by wireless access control apparatus selection access point provided by the present invention, its step comprises at least: mobile device is online to first access point; Mobile device transmits the first target device registration message to wireless access control apparatus through first access point; Second access point transmits the target device query messages to wireless access control apparatus after detecting mobile device, make wireless access control apparatus pass through first access point and transmit monitoring access point registration message to mobile device; The mobile device and second access point are set up online; Signal strength signal intensity between second access point transmission mobile device and second access point is to wireless access control apparatus; After wireless access control apparatus judges that signal strength signal intensity meets predefined roaming rule, transmit roaming and order to mobile device; Mobile device roams to second access point according to the roaming order.
System and method for provided by the present invention as above; And the difference between the prior art is that the present invention is transmitted by the access point that detects mobile device and mobile device between signal strength signal intensity to wireless access control apparatus; Whether wireless access control apparatus meets predefined roaming rule notice mobile device according to the signal strength signal intensity between mobile device and each access point is selected online access point; Use solving the existing in prior technology problem, and can reach the technological effect of roaming at a high speed.
Description of drawings
Figure 1A and Figure 1B are the roaming sketch map that the present invention carried.
Fig. 2 A is a loaming method flow chart of being selected access point by wireless access control apparatus of the present invention.
Fig. 2 B is the addition method flow chart that first access point of the present invention transmits first signal strength signal intensity.
Fig. 2 C is the addition method flow chart that second access point of the present invention transmits secondary signal intensity.
Fig. 2 D is the detailed method flow chart that first access point of the present invention transmits first signal strength signal intensity.
Fig. 2 E is the additional flow chart of loaming method of being selected access point by wireless access control apparatus of the present invention.
[main element symbol description]
100 mobile devices
201 first access points
202 second access points
300 wireless access control apparatus
401 first signal covering scopes
402 secondary signal covering scopes.
Embodiment
Below will cooperate graphic and embodiment to specify the present invention's characteristic and execution mode; Content is enough to make any related art techniques person of haveing the knack of can make much of the applied technological means of technical solution problem of the present invention easily and implements according to this, realizes the attainable effect of the present invention by this.
The present invention be by with access point (Access Point; AP) wireless access control apparatus (the Wireless Access Controller that connects; WAC) judging mobile device (station; When STA) having better second access point of the on line quality of first access point more online on every side, notify mobile device to roam (roaming) to second access point by first access point than institute at present.
In the present invention; Before roaming, be called as " first access point " with mobile device 100 online access points; After roaming, then be called as " second access point " with mobile device 100 online access points, in addition, in the present invention; Also can represent all access points in the wireless network at mobile device place, and represent other not online instantly access point with mobile device with " other access point " with access point.
Following elder generation explains System Operation of the present invention with " Figure 1A " and " Figure 1B ".Shown in " Figure 1A " or " Figure 1B ", the present invention's system contains mobile device 100, first access point 201, second access point 202 and wireless access control apparatus 300.
In addition, mobile device 100 also can be set up online with indicated access point in the monitoring access point registration message after receiving monitoring access point registration (Monitor AP Register) message that wireless access control apparatus 300 transmitted.
No matter mobile device 100 hands over mode and the access point held online with four hands; Or the monitoring access point registration message and the access point that are transmitted according to wireless access control apparatus 300 are online; Before mobile device 100 and access point are online; The capital is transmitted and is linked up package, uses the transmission at the online line data that advances.In the embodiment of part, the 4th the MAC network address of linking up in the package can be as the roaming recognition data (roam domain) of mobile device 100, but the roaming recognition data that the present invention carried is not as limit.
Similar, mobile device 100 can transmit second target device registration message to the wireless access control apparatus 300 through second access point 202 after online with second access point 202.Wherein, the second target device registration message that mobile device 100 is transmitted can comprise the golden key of safety and the roaming identification code of mobile device 100, but the second target device registration message of the present invention is not as limit.
In fact; First access point 201 can be with the signal strength signal intensity between each mobile device that CF (particular time interval just) transmits and first access point 201 is online; That is to say; First access point 201 listens to the communication package that mobile device 100 and other access point transmit in special time (time interval) after, first access point 201 just can transmit and signal strength signal intensity to the wireless access control apparatus 300 of 100 of mobile devices, if sometime at interval in; First access point 201 does not listen to mobile device 100 and links up package with other access point transmission, and then first access point 201 will can not transmit and the signal strength signal intensity of 100 of mobile devices.
In addition, first access point 201 also can be after receiving the monitoring access point registration message that wireless access control equipment 300 transmitted, and the monitoring access point registration message that will receive transfers to mobile device 100.
Pass the response message of target device query messages back at wireless access control apparatus 300 after; Second access point 202 can be obtained the roaming recognition data corresponding with the MAC Address of mobile device 100 in the response message by the target device query messages; And whether the roaming recognition data of judging roaming recognition data and mobile device 100 in the response message is identical, uses the identity that the roaming recognition data of roaming recognition data and mobile device 100 in response message is confirmed mobile device 100 when identical.
Similar with first access point 201, second access point 202 transmits secondary signal intensity to wireless access control apparatus 300 after can in particular time interval, listening to the second communication package that is transmitted between mobile device 100 and other access point.
Generally speaking; First access point 201 can with and online each mobile device of first access point 201 between signal strength signal intensity write signal intensity reward data in; And transmitting the signal strength signal intensity reward data to wireless access control apparatus 300 with CF; Second access point 202 also can use first access point 201 to transmit the mode of first signal strength signal intensity; After in the secondary signal intensity write signal intensity reward data, the signal strength signal intensity reward data is sent to wireless access control apparatus 300, but transmitting the mode of first signal strength signal intensity to wireless access control apparatus 300 or second access point, 202 transmission secondary signal intensity, first access point 201 do not exceed with above-mentioned.
What deserves to be mentioned is that first access point 201 and second access point 202 only provide different functions and give mobile device 100, both not differences on practice; That is to say; Mobile device 100 hands over the mode hold to be online to a certain access point with four hands after, or after mobile device 100 roams to another access point by this access point, as far as mobile device 100; This access point is first access point of the present invention; And if the another one mobile device roams to same access point by other access point, then for the mobile device of roaming, this access point is " second access point " of the present invention.
Wireless access control apparatus 300 is responsible for receiving the first target device registration message that mobile devices 100 transmit through 201 of first access points, by 201 of first access points 100 of that transmit and mobile devices first signal strength signal intensity, the second target device registration message that mobile device transmits through 202 of second access points, the target device query messages that is transmitted by second access point 202 and by 202 of second access points secondary signal intensity of 100 of that transmit and mobile devices.
Wireless access control apparatus 300 is responsible for after receiving the target device query messages that second access point 202 transmitted, transmitting response message to the second access point 202, and transmits monitoring access point registration messages to mobile device 100 through first access point 201.
It is regular that wireless access control apparatus 300 is responsible for also judging whether the secondary signal intensity of 100 of second access point 202 and mobile devices meets predefined roaming; If secondary signal intensity meets predefined roaming rule; Expression is as far as mobile device 100; The most suitable online access point is second access point 202; Therefore, wireless access control apparatus 300 can transmit roaming and order to mobile device 100, makes mobile device 100 roam to second access point 202 according to the roaming order by first access point 201.
Predefined roaming rule of the present invention has difference along with antenna difference that access point used; In the embodiment of part; The antenna that access point used is during as leaky cable (Leak Cable); The secondary signal intensity whether the roaming rule can transmit 100 of second access point 202 and mobile devices first for second access point 202 is to wireless access control apparatus 300, if then to meet roaming regular for secondary signal intensity; In the embodiment of part, the antenna that access point used is during as sensing type antenna (direction antenna), roam rule can for secondary signal intensity greater than the predetermined strength threshold value; And the part embodiment in, when the employed antenna of access point is omni-directional antenna (omni antenna), the roaming rule can for secondary signal intensity greater than first signal strength signal intensity.
On practice; When antenna that access point used during as sensing type antenna or omni-directional antenna; Predefined roaming rule except above-mentioned secondary signal intensity greater than first signal strength signal intensity or greater than the intensity threshold value; Usually can also comprise secondary signal intensity and whether surpass the preset time threshold value greater than duration of first signal strength signal intensity or intensity threshold value; That is to say; Wireless access control apparatus 300 judge secondary signal intensity greater than first signal strength signal intensity or intensity threshold value after, need judge also whether secondary signal intensity surpasses the preset time threshold value greater than duration of first signal strength signal intensity or intensity threshold value, if secondary signal intensity also surpasses threshold value greater than duration of first signal strength signal intensity or intensity threshold value; Wireless access control apparatus 300 just can be judged secondary signal intensity and meet predefined roaming rule, and transmits roaming and order to mobile device 100.
Wireless access control apparatus 300 also is responsible for after receiving the second target device registration message that mobile device 100 transmitted, the on line state data of the mobile device 100 of original storages of deletion, and write down mobile device and be online to second access point 202.
Then explain orally operation system of the present invention and method with an embodiment, and please with reference to " Fig. 2 A " the main flow chart of selecting the loaming method of access point by wireless access control apparatus of the present invention.In the present embodiment; Suppose that mobile device 100 is mobile computer, but mobile device of the present invention 100 is as limit, all miscellaneous equipments of the communications protocol of IEEE 802.11 that can use can be called mobile device of the present invention; For example, mobile phone, PDA etc.
If the wireless network architecture in the present embodiment is shown in " Figure 1A "; Get into the first signal covering scope 401 (step 501) that first access point 201 is had at mobile device 100; And after not getting into 202 of second access points and gathering around the secondary signal covering scope 402 of usefulness, mobile device 100 can be online to first access point 201 (step 540).At this moment, mobile device 100 can hand over the mode and first access point 201 held online with four hands.
After mobile device 100 is online to first access point 201 (step 540); Mobile device 100 can transmit the first target device registration message and give first access point 201, uses through first access point 201 and passes on first target device registration message to the wireless access control apparatus 300 (step 550).
After mobile device 100 transmits first target device registration message to the wireless access control apparatus 300 (step 550) through first access point 201; First access point 201 can be at a certain time interval; Continue first signal strength signal intensity of 201 of the detecting mobile device 100 and first access points, and first signal strength signal intensity that will detect is sent to wireless access control apparatus 300 (step 580).Wherein, the time interval of first access point 201 detecting, first signal strength signal intensity, for example 50ms, 100ms etc., but the present invention is not as limit.
In order to lower the load of wireless access control apparatus 300; First access point 201 is before transmitting first signal strength signal intensity to wireless access control apparatus 300; Can shown in the flow process of " Fig. 2 B ", monitor mobile device 100 earlier and whether transmit communication package (step 561) with second access point 202.If first access point 201 does not listen to mobile device 100 and second access point 202 transmits the communication package; Represent that then mobile device 100 does not move in the secondary signal covering scope 402 that second access point 202 had; This moment, mobile device 100 had only first access point 201 can be online, so can not need roaming.Therefore, wireless access control apparatus 300 also need not handled the signal strength signal intensity between mobile device 100 and each access point, so first access point 201 can not transmit first signal strength signal intensity that detects.
And if mobile device 100 has moved to the common factor place (step 601) of the secondary signal covering scope 402 that the first signal covering scope 401 that first access point 201 had and second access point 202 had; Shown in " Figure 1B "; Then mobile device 100 can be because constantly in the reason of detecting other access point; And detect the existence of second access point 202, then, mobile device 100 can carry out the exchange of data and produce the communication package with second access point 202.So, first access point 201 at the package of monitoring 100 sending and receiving of mobile device just can listen to the communication package in mobile device 100 and 202 transmission of second access point.
Listen to behind the communication package of mobile device 100 and 202 transmission of second access point at first access point 201, first access point 201 can further judge the roaming recognition data that is recorded in the communication package that is listened to whether with the roaming recognition data identical (step 563) of mobile device 100.Because; The communication package that 201 of first access points listen to is the package of mobile device 100 and second access point, 202 swap datas; Therefore, can to judge the roaming recognition data of linking up in the package identical with the roaming recognition data of mobile device 100 for first access point 201.
Then, first access point 201 can be detected first signal strength signal intensity of 100 of first access point 201 and mobile devices, and first signal strength signal intensity that will detect is sent to wireless access control apparatus 300 (step 580).In the present embodiment; In supposing that first access point 201 can the first signal strength signal intensity write signal intensity reward data with 100 of first access point 201 and mobile devices; The signal strength signal intensity reward data that will record first signal strength signal intensity again is sent to wireless access control apparatus 300, but the mode that first access point 201 transmits first signal strength signal intensity is not as limit.
In addition, on practice, first signal strength signal intensity that first access point 201 can continue 100 of transmission first access point 201 and mobile devices at a certain time interval is sent to wireless access control apparatus 300.Wherein, first access point 201 transmits the time interval of first signal strength signal intensity to wireless access control apparatus 300, for example 50ms, 100ms etc., but the time interval of the present invention is not as limit.
And after moving to the common factor place (step 601) of the secondary signal covering scope 402 that the first signal covering scope 401 that first access point 201 had and second access point 202 had at mobile device 100; When second access point 202 just can have package to transmit between the mobile device 100 and first access point 201; Detect the existence of mobile device 100; Then; Second access point 202 can be according to the MAC position of obtaining mobile device 100 in mobile device 100 and 201 packages that transmitted of first access point, and transmits target device query messages to the wireless access control apparatus 300 (step 620) of the MAC Address that comprises mobile device 100.
Wireless access control apparatus 300 is after receiving the target device query messages that second access point 202 transmitted; Can transmit monitoring access point registration message to the first access point 201; First access point 201 can transfer to mobile device 100 (step 630) with the monitoring access point registration message that receives after receiving the monitoring access point registration message that wireless access control apparatus 300 transmitted.
Equally after wireless access control apparatus 300 receives the target device query messages; Wireless access control apparatus 300 can be according to the MAC Address of mobile device 100; Search the roaming recognition data of mobile device 100; Afterwards, transmit the response message of the roaming recognition data that comprises mobile device 100 and give second access point 202, make second access point 202 be able to confirm the identity of mobile device 100 through the roaming recognition data in the received response message.
After second access point 202 is confirmed the identity of mobile device 100; Second access point 202 can be at a certain time interval; Continue the secondary signal intensity of 202 of the detecting mobile device 100 and second access points, and the secondary signal intensity that detects is sent to wireless access control apparatus 300 (step 680).Wherein, the time interval of second access point 202 detecting secondary signal intensity, for example 50ms, 100ms etc., but the present invention is not as limit.
But; Same; In order to lower the load of wireless access control apparatus 300; Second access point 202 is transmitting secondary signal intensity to wireless access control apparatus 300, can shown in the flow process of " Fig. 2 C ", monitor mobile device 100 earlier and whether transmit online package (step 662) with first access point 201.
Because the characteristic of WiFi; When mobile device 100 moves to the common factor place of the secondary signal covering scope 402 that the first signal covering scope 401 that first access point 201 had and second access point 202 had; Second access point 202 can listen at mobile device 100 and 201 online packages that transmitted of first access point; Therefore, second access point 202 can judge the roaming recognition data that write down in the online package that is listened to whether with the roaming recognition data identical (step 663) of mobile device 100.Because; The online package that 202 of second access points listen to is that the mobile device 100 and first access point 201 are confirmed the package that maintenance is online; Therefore, the roaming recognition data that can judge in the online package of second access point 202 is identical with the roaming recognition data of mobile device 100.
Then, second access point 202 can be detected the secondary signal intensity of 100 of second access point 202 and mobile devices, and the secondary signal intensity that detects is sent to wireless access control apparatus 300 (step 680).Wherein, Second access point 202 can be shown in the flow process of " Fig. 2 D "; Use the mode similar with first access point 201; With in the secondary signal intensity write signal intensity reward data of 100 of second access point 202 and mobile devices (step 681), the signal strength signal intensity reward data that will record secondary signal intensity again is sent to wireless access control apparatus 300 (step 685), but the mode that second access point 202 transmits the secondary signal intensity is not as limit.
In addition, second access point 202 can be sent to wireless access control apparatus 300 with the secondary signal intensity that interbody spacer (just with identical frequency) in identical with first access point 201 continues to transmit 100 of second access point 202 and mobile devices.
First signal strength signal intensity that continues to detect at first access point 201 is sent to wireless access control apparatus 300 (step 580); And after second access point 202 continues the secondary signal intensity that detects is sent to wireless access control apparatus 300 (step 680); Wireless access control apparatus 300 can judge whether secondary signal intensity meets predefined roaming rule (step 710), uses and selects the access point best as far as mobile device 100.Wherein, It is identical with the time interval that first access point, 201/ second access point 202 transmits first signal strength signal intensity/secondary signal intensity that wireless access control apparatus 300 judges whether secondary signal intensity meets the common meeting of the regular time interval of predefined roaming; But the present invention is not as limit; Wherein, predefined roaming rule and the institute cloth antenna system of building is relevant.
In the present embodiment; When mobile device 100 and antenna that access point used during as leaky cable; The roaming rule can be defined as the secondary signal intensity whether second access point 202 transmit 100 of second access point 202 and mobile devices first and arrive wireless access control apparatus 300; At this moment; If wireless access control apparatus 300 is judged the secondary signal intensity that receives 100 of second access point 202 that second access point 202 transmitted and mobile devices first; Then wireless access control apparatus 300 can judge that secondary signal intensity meets the roaming rule, and if second access point 202 had before transmitted secondary signal intensity to wireless access control apparatus 300, then wireless access control apparatus 300 can judge that secondary signal intensity does not meet the roaming rule.
If mobile device 100 and antenna that access point used are during as sensing type antenna; The roaming rule of present embodiment can be defined as secondary signal intensity greater than the predetermined strength threshold value; That is to say; If after wireless access control apparatus 300 judged that secondary signal intensity that second access point 202 transmitted is greater than the predetermined strength threshold value, wireless access control apparatus 300 can judge that the secondary signal intensity meet the roaming rule.In addition; Roaming rule can also comprise secondary signal intensity and surpass the preset time threshold value greater than duration of predetermined strength threshold value; In the case; Wireless access control apparatus 300 judge secondary signal intensity that second access point 202 transmitted greater than the predetermined strength threshold value after; Also need judge secondary signal intensity and also surpass the preset time threshold value greater than duration of predetermined strength threshold value, so, wireless access control apparatus 300 can judge that just secondary signal intensity meets the roaming rule.
And when mobile device 100 and antenna that access point uses during as the omni-directional antenna; The roaming rule of present embodiment can be defined as secondary signal intensity greater than first signal strength signal intensity; Even; Definition during with sensing type antenna is similar, and roaming rule can also comprise secondary signal intensity and surpass scheduled time threshold value greater than duration of first signal strength signal intensity.So; Wireless access control apparatus 300 is except first signal strength signal intensity that the secondary signal intensity judging second access point 202 and transmitted is transmitted greater than first access point 201; Also need judge secondary signal intensity and also surpass scheduled time threshold value greater than duration of first signal strength signal intensity; So; Wireless access control apparatus 300 can judge that just secondary signal intensity meets roaming rule, otherwise that wireless access control apparatus 300 can not think that second access point 202 is more suitable for mobile device 100 than first access point 201 is online.
After wireless access control apparatus 300 judged that secondary signal intensity meets predefined roaming rule, wireless access control apparatus 300 will transmit roaming through first access point 201 and/or second access point 202 and order to mobile device 100 (step 720).
Transmit roaming at wireless access control apparatus 300 through access point and order to mobile device 100 (step 720), mobile device 100 can roam into second access point 202 (step 730) by first access point 201 according to the roaming order that wireless access control apparatus 300 is transmitted.
Then please continue with reference to " Fig. 2 E ", after mobile device 100 roamed into second access point 202, mobile device 100 can transmit second target device registration message to the wireless access control apparatus 300 (step 750) through second access point 202.
After wireless access control apparatus 300 receives the second target device registration message that mobile device 100 transmitted; Wireless access control apparatus 300 can be deleted the on line state data (step 792) of mobile device; And the record mobile device has been online to second access point 202 (step 796), so just accomplishes all roam procedure.
In the above-described embodiments; When second access point 202 does not listen to mobile device 100 and the online package of first access point, 201 transmission; Represent that then mobile device 100 has moved to outside the first signal covering scope 401 that first access point 201 had; 100 remaining second access points 202 of mobile device this moment can be online, so can not need roaming.Therefore, wireless access control apparatus 300 also need not handled the signal strength signal intensity between mobile device 100 and each access point, so second access point 202 can not transmit first signal strength signal intensity that detects.
In sum; But the difference between knowledge capital invention and the prior art is to have by the signal strength signal intensity between access point transmission that detects mobile device and mobile device to wireless access control apparatus; Whether wireless access control apparatus meets the technological means that predefined roaming rule notice mobile device is selected online access point according to the signal strength signal intensity between mobile device and each access point; Can solve the existing mobile device of prior art by this technological means and can't take into account the problem of network on-line quality and data transmission efficiency, and then reach the technological effect of roaming at a high speed.
Moreover; The present invention's loaming method by wireless access control apparatus selection access point; Can be implemented in the combination of hardware, software or hardware and software, the dispersing mode of also can be in computer system realizing or intersperse among with different assemblies the computer system of several interconnected with centralized system is realized.
Though execution mode provided by the present invention as above, described content is not in order to direct qualification scope of patent protection of the present invention.Have common knowledge the knowledgeable in the technical field under any the present invention, under the prerequisite that does not break away from spirit provided by the present invention and scope, in form reaching of enforcement of the present invention done a little change retouching on the details, all belong to scope of patent protection of the present invention.Scope of patent protection of the present invention, still must with appending claims the person of being defined be as the criterion.
Claims (10)
1. select the loaming method of access point by wireless access control apparatus for one kind, this loaming method comprises the following step at least:
One mobile device is online to one first access point;
This mobile device transmits one first target device registration message to a wireless access control apparatus through this first access point;
One second access point transmits a target device query messages to this wireless access control apparatus after detecting this mobile device, make this wireless access control apparatus transmit a monitoring access point registration message to this mobile device through this first access point;
This mobile device and this second access point are set up online;
Signal strength signal intensity between this second access point this mobile device of transmission and this second access point is to this wireless access control apparatus;
After this wireless access control apparatus judges that this signal strength signal intensity meets predefined roaming rule, transmit a roaming order to this mobile device; And
This mobile device roams to this second access point according to this roaming order.
2. the loaming method of selecting access point by wireless access control apparatus as claimed in claim 1; Wherein this loaming method transmits this first target device registration message in this mobile device to the step of this wireless access control apparatus through this first access point; More comprise this first access point and listen to this mobile device and this second access point transmission one communication package; And after the roaming recognition data of judging roaming recognition data and this mobile device in this communication package is identical, transmit signal strength signal intensity between this mobile device and this first access point to this wireless access control apparatus with certain frequency.
3. the loaming method of selecting access point by wireless access control apparatus as claimed in claim 1; Wherein this loaming method in this second access point after the step that detects this mobile device; Comprise more that this second access point listens to this mobile device and this first access point transmits an online package; And after the roaming recognition data of judging roaming recognition data and this mobile device in this online package is identical, continue to transmit this signal strength signal intensity to this wireless access control apparatus.
4. the loaming method of selecting access point by wireless access control apparatus as claimed in claim 1; Wherein the step of this signal strength signal intensity to this wireless access control apparatus between this second access point this mobile device of transmission and this second access point is that this second access point writes in this signal strength signal intensity to one signal strength signal intensity reward data, and transmits this signal strength signal intensity reward data to this wireless access control apparatus with a CF.
5. the loaming method of selecting access point by wireless access control apparatus as claimed in claim 1; Wherein this loaming method is after this mobile device roams to this second access point according to this roaming order; More comprise this mobile device and transmit one second target device registration message to this wireless access control apparatus through this second access point; This wireless access control apparatus is after receiving this second target device registration message; Delete the on line state data of this mobile device, and write down the step that this mobile device has been online to this second access point.
6. select the roaming system of access point by wireless access control apparatus for one kind, this roaming system comprises at least:
One mobile device;
One first access point provides this mobile device online, in order to pass on the one first target device registration message that this mobile device transmitted;
One second access point, be used to detect this mobile device after, transmit a target device query messages, and in order to transmit and this mobile device between a signal strength signal intensity; And
One wireless access control apparatus; After being used to receive this target device query messages that this second access point transmitted; Transmit a monitoring access point registration message to this mobile device through this first access point, it is online that this mobile device and this second access point are set up, and in order to after judging that this signal strength signal intensity meets predefined roaming rule; Transmit a roaming order to this mobile device, make this mobile device roam to this second access point according to this roaming order.
7. as claimed in claim 6ly select the roaming system of access point by wireless access control apparatus, wherein should predefined roaming rule for this signal strength signal intensity greater than signal strength signal intensity that this first access point transmitted and this signal strength signal intensity greater than the duration of the signal strength signal intensity that this first access point transmitted satisfy scheduled time threshold value, this signal strength signal intensity be this second access point transmit first and this mobile device between signal strength signal intensity or this signal strength signal intensity greater than the predetermined strength threshold value.
8. the roaming system of selecting access point by wireless access control apparatus as claimed in claim 6; Wherein this first access point more is used to listen to this mobile device and this second access point transmission one communication package; And after the roaming recognition data of judging roaming recognition data and this mobile device in this communication package is identical, transmit signal strength signal intensity between this mobile device and this first access point to this wireless access control apparatus with certain frequency.
9. the roaming system of selecting access point by wireless access control apparatus as claimed in claim 6; Wherein this second access point more is used to listen to this mobile device and this first access point transmits an online package; And after the roaming recognition data of judging roaming recognition data and this mobile device in this online package is identical, continue to transmit this signal strength signal intensity to this wireless access control apparatus.
10. the roaming system of selecting access point by wireless access control apparatus as claimed in claim 6; After wherein this mobile device more is used to roam to this second access point; Pass on one second target device registration message to this wireless access control apparatus through this second access point; This wireless access control apparatus is deleted the on line state data of this mobile device after more being used to receive this second target device registration message, and writes down this mobile device and be online to this second access point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110157918.3A CN102833720B (en) | 2011-06-13 | 2011-06-13 | Roaming system and the method thereof of access point is selected by wireless access control apparatus |
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| CN201110157918.3A CN102833720B (en) | 2011-06-13 | 2011-06-13 | Roaming system and the method thereof of access point is selected by wireless access control apparatus |
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| CN102833720A true CN102833720A (en) | 2012-12-19 |
| CN102833720B CN102833720B (en) | 2016-08-03 |
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| WO2019223679A1 (en) * | 2018-05-21 | 2019-11-28 | 中兴通讯股份有限公司 | Roaming method, access point, and access point collaborative work controller |
| CN111693834A (en) * | 2020-06-18 | 2020-09-22 | 国网福建省电力有限公司福州供电公司 | Lightweight carrying type partial discharge detection device and detection method |
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| CN112040470B (en) * | 2020-09-14 | 2023-08-08 | 普联技术有限公司 | Roaming evaluation method, network management equipment and access point equipment |
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