CN109862582B - Centralized optimal AP (access point) rapid association method - Google Patents
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- CN109862582B CN109862582B CN201910152551.2A CN201910152551A CN109862582B CN 109862582 B CN109862582 B CN 109862582B CN 201910152551 A CN201910152551 A CN 201910152551A CN 109862582 B CN109862582 B CN 109862582B
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Abstract
The invention relates to the technical field of wireless network communication, in particular to a centralized optimal AP (access point) quick association method, which comprises the following steps: a detection step, wherein a client sends a detection request to obtain a detection response; the association step, the client selects the optimal AP association according to the detection response; the detection step specifically comprises: s100: a client sends a detection request; s200: the AP receives the detection request, generates a detection response and sends the detection response to the intermediate server; s300: the intermediate server receives the detection response of the AP and replies the detection response to the client. S300 specifically comprises: s301: the intermediate server receives a detection response of the AP; s302: the intermediate server sorts the detection responses of all the APs according to the content of the detection responses; s303: and the intermediate server sends the detection responses of all the APs to the client according to the sequencing order. The centralized optimal AP rapid association method can solve the problems of low association speed, low efficiency and high power consumption of the client in the prior art.
Description
Technical Field
The invention relates to the technical field of wireless network communication, in particular to a centralized optimal AP (access point) quick association method.
Background
Wireless Local Area Networks (WLANs) provide a Wireless connection service for Local Area Networks, can provide high-speed Wireless data access, and have been widely used in various places such as cities, enterprises, buildings, and homes. Compared with the traditional wired Access mode, the wireless local area network enables users of the network to be more free, thoroughly gets rid of the constraint of cable and port positions, enables the terminal to have the advantages of being convenient to carry, easy to move and the like, avoids or reduces complicated network wiring, and can establish the local area network covering the whole building or area only by arranging one or more AP (Access Point) devices.
A typical connection procedure for a WLAN-based client to an AP includes the following steps:
(1) the client sends a Probe request to the AP;
(2) the AP returns a Probe response (Probe response) to the client;
(3) the client sends an authentication request (authentication request);
(4) the AP returns an authentication response (authentication response) to the client;
(5) sending an association request (Associte request) by the client;
(6) the AP returns an association response (association response) to the client.
After receiving the association response, the client can associate with the corresponding AP to establish network connection.
With the application of the internet of things, in order to improve user access amount and network quality of each user, a scene that multiple APs jointly cover the same area is more and more common, and each client often needs to select an optimal AP from the multiple APs to connect in order to ensure that the client can have the best network quality, because a channel is usually asymmetric, the selection of the optimal AP is a bidirectional selection process, the client needs to poll the multiple APs to negotiate to determine a final associated AP, and this way often only can select a local optimal AP, but not a global optimal AP, and this situation can consume a long time, which affects networking association efficiency. While increasing the power consumption of the client, especially for some battery powered clients, this reduces the standby time of the machine.
Disclosure of Invention
The invention aims to provide a centralized optimal AP (access point) rapid association method, which can solve the problems of low association speed, low efficiency and high power consumption of a client in the prior art.
In order to solve the technical problem, the present application provides the following technical solutions:
a centralized optimal AP quick association method comprises the following steps:
a detection step, wherein a client sends a detection request to obtain a detection response;
the association step, the client selects the optimal AP for association according to the acquired detection response;
wherein, the detection step specifically includes:
s100: a client sends a detection request;
s200: the AP receives the detection request, generates a detection response and sends the detection response to the intermediate server;
s300: the intermediate server receives the detection response of the AP and replies the detection response to the client.
In the technical scheme of the invention, the intermediate server is arranged, after the AP receives the detection request, the AP does not directly respond to the client for the detection response, but sends the detection response to the intermediate server, and the intermediate server uniformly forwards the detection response to the client, so that the client can be prevented from polling each AP for many times, the detection time required by the client for associating the network can be reduced, the network association efficiency is improved, the client communication times are reduced, and the client networking power consumption is reduced.
Further, the S300 specifically includes:
s301: the intermediate server receives a detection response of the AP;
s302: the intermediate server sorts the detection responses of all the APs according to the content of the detection responses;
s303: and the intermediate server sends the detection responses of all the APs to the client according to the sequencing order.
The intermediate server can sort the detection responses according to a preset strategy or method, and further can help the client to process and screen the AP in advance, and the processing of the client to the AP can be reduced.
Further, the associating step specifically includes:
s500: the client receives a detection response sent by the intermediate server;
s600: the client selects an optimal AP from the received detection responses to initiate an association request;
s700: and the AP receives the association request and replies association response to the client.
And the client acquires the information of all the APs according to the received detection responses, and selects the optimal AP to initiate association to realize associated networking.
Further, in S500, after receiving a probe response, if the client does not receive a subsequent probe response within a time period exceeding one frame interval, it is determined that the intermediate server has already sent the probe responses of all the APs. And judging whether the sending of the detection responses is finished or not according to the time interval between the detection responses.
Further, the detecting step further includes S400, in S400, the steps S100-S300 are repeatedly executed X times, and the value of X is determined by the client according to a preset decision policy. The method has the advantages that the method is repeatedly executed for many times, more APs can be obtained as far as possible, the client can receive enough AP detection response data, the client can determine the number of times of circular execution according to a preset strategy, and when the received AP detection response data can meet the requirement of the preset strategy, the client stops sending the detection request, so that network association is completed as soon as possible, time consumption is reduced, and energy consumption is reduced.
Further, in S400, the probe request sent by the client includes the number of received probe responses.
Further, in S600, the client acquires AP information in response to the received probe response of the AP, optimally sorts the APs according to a preset policy based on the AP information, and selects the first AP to be the optimal AP. The client optimally sorts the APs according to a preset strategy, so that the client can select the most appropriate AP.
Further, in S302, the intermediate server obtains AP information according to the content of the probe response, and performs optimal sorting according to a preset policy, and in S600, the client selects an AP corresponding to the first probe response sent by the intermediate server as an optimal AP. The optimal sequencing is carried out through the intermediate server, the client only needs to take the first detection response as the optimal AP, and the selection of the optimal AP is completed by the intermediate server, so that on one hand, the server can uniformly manage the whole network to ensure the network balance, on the other hand, the operation amount and the power consumption of the client can be reduced, and the speed and the efficiency of the client accessing the network are improved.
Further, the AP information includes one or more of AP load condition and signal-to-noise ratio.
The network load distribution can be kept balanced when the client is connected with the network through the AP load condition, the AP overload or no load is avoided, the data transmission quality of the network can be judged through the signal-to-noise ratio, and the quality of data communication between the client and the AP is ensured.
Further, the client does not receive data within a preset time from the beginning of the receiving time slot or the header of the received data packet does not conform to a preset rule, and then the client enters a sleep mode. And if the data is not received within the preset time, stopping the monitoring, and entering a dormant state to reduce the power consumption. Whether the current data is the data which the client wants to receive is judged through the packet header, if not, the receiving is immediately stopped, and the sleep mode is entered to skip the time slot, so that the effect of reducing the power consumption of the client can be achieved.
Drawings
Fig. 1 is a flowchart of an embodiment of a centralized optimal AP fast association method according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, a centralized optimal AP fast association method of this embodiment includes the following steps:
a detection step, wherein a client sends a detection request to obtain a detection response;
the association step, the client selects the optimal AP for association according to the acquired detection response;
wherein, the detection step specifically includes:
s100: a client sends a detection request;
s200: the AP receives the detection request, generates a detection response and sends the detection response to the intermediate server;
s300: the intermediate server receives the detection response of the AP and replies the detection response to the client;
s400: and repeatedly executing the steps S100-S300 for X times, wherein the value of X is determined by the client according to a preset decision strategy, and the detection request sent by the client comprises the number of the received detection responses.
In this embodiment, the decision policy preset by the client is as follows: if the received probe response of the AP already has parameters of the AP, such as signal strength, corresponding speed, signal-to-noise ratio, load rate, and the like, which can sufficiently meet the requirements of the client, the probe request is stopped from being sent, that is, the cycle of S100-S300 is stopped; or the number of the APs corresponding to the probe response of the AP received by the client has reached the preset value, the sending of the probe request is stopped. The client can know how many APs can hear the client through the probing responses sent back by the APs, and then the client can preset the number of the APs to be received. In other embodiments, other decision strategies may be adopted, and the preset value may also be a fixed value or a value calculated by other formulas.
The associating step specifically comprises:
s500: the client receives a detection response sent by the intermediate server;
s600: the client selects an optimal AP from the received detection responses to initiate an association request;
s700: and the AP receives the association request and replies association response to the client.
Wherein, S300 specifically includes:
s301: the intermediate server receives a detection response of the AP;
s302: the intermediate server sorts the detection responses of all the APs according to the content of the detection responses;
s303: and the intermediate server sends the detection responses of all the APs to the client according to the sequencing order.
In S500, after receiving a probe response, if the ue does not receive a subsequent probe response within a time period exceeding one frame interval, it is determined that the intermediate server has already sent the probe responses of all the APs. The method comprises the steps that the client does not receive data within a preset time from the beginning of a receiving time slot or the header of a received data packet does not accord with a preset rule, the client enters a sleep mode, specifically, after the client enters the receiving time slot, the client does not receive data within a time length 1/4 before the receiving time slot, the client judges that the time slot does not receive data basically, and then the client stops monitoring and enters the sleep mode; if the client receives the data packet, but judges that the current data packet is not the data packet which is not intended to be received according to the data packet header, the interception is stopped, and the client enters a sleep mode.
In S600 of this embodiment, the client obtains AP information from a received probe response of the AP, where the AP information includes AP load conditions, signal-to-noise ratio, and the like, optimally sorts the APs according to a preset policy based on the AP information, and selects the first AP to be the optimal AP. The preset strategy in this embodiment is an optimal signal-to-noise ratio strategy, that is, the ordering is performed according to the signal-to-noise ratio from high to low.
In another embodiment of the present invention, in S302, the intermediate server obtains AP information according to the content of the probe response, and performs optimal sorting according to a preset policy, and in S600, the client selects an AP corresponding to the first probe response sent by the intermediate server as an optimal AP. In the embodiment, the intermediate server performs optimal sequencing, the client only needs to take the first detection response as the optimal AP, and the selection of the optimal AP is completed by the intermediate server, so that on one hand, the server can uniformly manage the whole network to ensure network balance, on the other hand, the calculation amount and power consumption of the client can be reduced, and the speed and efficiency of accessing the client to the network are improved.
When the technical scheme of the embodiment is operated, the AP does not directly respond to the detection response to the client after receiving the detection request, but sends the detection response to the intermediate server, and the intermediate server uniformly forwards the detection response to the client, so that the client can be prevented from polling all the APs for many times, the detection time required by the client for associating the network can be reduced, the network association efficiency is improved, the client communication frequency is reduced, and the client networking power consumption is reduced. The detection step is repeatedly executed for many times, more APs can be obtained as far as possible, the client side can receive enough AP detection response data, the network load distribution can be kept balanced when the client side is connected with the network through the AP load condition, the AP overload or no-load is avoided, the data transmission quality of the network can be judged through the signal-to-noise ratio, and the quality of data communication between the client side and the APs is ensured. In addition, the intermediate server in this embodiment may sort the probe responses according to a preset policy or method, and may further help the client to perform processing and screening of the AP in advance, so that processing of the client to the AP may be reduced.
The foregoing are merely exemplary embodiments of the present invention, and no attempt is made to show structural details of the invention in more detail than is necessary for the fundamental understanding of the art, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice with the teachings of the invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. A centralized optimal AP quick association method comprises the following steps:
a detection step, wherein a client sends a detection request to obtain a detection response;
the association step, the client selects the optimal AP for association according to the acquired detection response;
the method is characterized in that: the detection step specifically comprises:
s100: a client sends a detection request;
s200: the AP receives the detection request, generates a detection response and sends the detection response to the intermediate server;
s300: the intermediate server receives the detection response of the AP and replies the detection response to the client;
the S300 specifically includes:
s301: the intermediate server receives a detection response of the AP;
s302: the intermediate server sorts the detection responses of all the APs according to the content of the detection responses;
s303: and the intermediate server sends the detection responses of all the APs to the client according to the sequencing order.
2. The centralized fast association method for optimal APs as claimed in claim 1, wherein: the associating step specifically includes:
s500: the client receives a detection response sent by the intermediate server;
s600: the client selects an optimal AP from the received detection responses to initiate an association request;
s700: and the AP receives the association request and replies association response to the client.
3. The centralized fast association method for optimal APs as claimed in claim 2, wherein: in S500, after receiving a probe response, if the client does not receive a subsequent probe response within a time period exceeding one frame interval, it is determined that the intermediate server has already sent the probe responses of all the APs.
4. The centralized fast association method for optimal APs as claimed in claim 1, wherein: the detecting step further comprises S400, in S400, the steps S100-S300 are repeatedly executed for X times, and the value of X is determined by the client according to a preset decision strategy.
5. The centralized fast association method for optimal APs as claimed in claim 4, wherein: in S400, the probe request sent by the client includes the number of received probe responses.
6. The centralized fast association method for optimal APs as claimed in claim 2, wherein: in S600, the client acquires AP information in response to the received probe response of the AP, optimally sorts the APs according to the AP information and a preset policy, and selects the first AP to be the optimal AP.
7. The centralized fast association method for optimal APs as claimed in claim 2, wherein: in S302, the intermediate server obtains AP information according to the content of the probe response, and performs optimal sorting according to a preset policy, and in S600, the client selects an AP corresponding to the first probe response sent by the intermediate server as an optimal AP.
8. The centralized fast association method for optimal APs as claimed in claim 6 or 7, wherein: the AP information comprises one or more of AP load condition and signal-to-noise ratio.
9. The centralized fast association method for optimal APs as claimed in claim 1, wherein: and the client does not receive data within the preset time from the beginning of the receiving time slot or the header of the received data packet does not accord with the preset rule, and then the client enters a sleep mode.
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| CN101534540A (en) * | 2009-04-20 | 2009-09-16 | 杭州华三通信技术有限公司 | A response method and device of explore frames in the wireless local area network |
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| CN106358174A (en) * | 2016-09-23 | 2017-01-25 | 上海众人网络安全技术有限公司 | Wireless roaming hotspot access method, system and wireless terminal |
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| US8687543B2 (en) * | 2005-04-05 | 2014-04-01 | Cisco Technology, Inc. | Wireless connection selection and setup |
| US9730085B2 (en) * | 2014-06-30 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless probe devices |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101534540A (en) * | 2009-04-20 | 2009-09-16 | 杭州华三通信技术有限公司 | A response method and device of explore frames in the wireless local area network |
| CN104041098A (en) * | 2012-01-11 | 2014-09-10 | 交互数字专利控股公司 | Method and apparatus for accelerated link setup between STA and access point of IEEE802.11 network |
| CN106358174A (en) * | 2016-09-23 | 2017-01-25 | 上海众人网络安全技术有限公司 | Wireless roaming hotspot access method, system and wireless terminal |
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Effective date of registration: 20230419 Address after: 401120 14th Floor, 107 Daguzhong Road, Xiantao Street, Yubei District, Chongqing Patentee after: WU QI TECHNOLOGIES, Inc. Address before: 400000 14 / F, 107 dataguzhong Road, Xiantao street, Yubei District, Chongqing Patentee before: WU QI TECHNOLOGIES, Inc. Patentee before: SHANGHAI WU QI TECHNOLOGIES, Inc. |