CN105704679A - Method for quickly connecting AP and SD with confirming function under uncorrelated WIFI environment - Google Patents

Abstract

The invention discloses a method for fast connection between an AP and an SD with a confirmation function in an unrelated WIFI environment, comprising: the AP extracts its own device information; encrypts the extracted device information into a data stream; the AP encrypts the data The stream is embedded in at least one broadcast frame in the form of embedded data; then all broadcast frames with embedded data are broadcast periodically in order; SD is started through the confirmation function as required, and the SD periodically switches the working channel to capture the broadcast frame; then analyze the broadcast frame, extract its embedded data flow information, and obtain the AP device information; finally, the SD sends a link authentication request according to the obtained AP device information; the AP associates with the SD to complete the fast connection. The present invention utilizes the self-device information actively broadcasted and encrypted by the AP to detect the SD to establish a connection to the AP, which is convenient and quick, and enables or disables the SD when needed through the confirmation function, reducing the probability of the SD mistakenly forming a network in the process of intelligent networking.

Description

A method for quick connection between AP and SD with confirmation function in unassociated WIFI environment

technical field

The invention relates to the technical field of wireless communication, in particular to a method for fast connection between an AP and an SD with a confirmation function in an unrelated WIFI environment.

Background technique

With the continuous rise of the Internet and the increasingly prominent mobile demand, the demand for wireless interconnection is also becoming stronger. Among the existing wireless communication technologies, the bluetooth communication technology has a small coverage area, and the infrared communication technology is greatly affected by the environment, and the effect of penetrating walls is not ideal. Due to its wide application, WIFI communication technology is gradually accepted by enterprises and families. In the traditional standard-based IEEE802.11, the wireless network specification is defined: one wireless point is used as the AP (AccessPoint) mode, and other wireless points are used as the STA (STAtion) mode. After the STA is associated with the AP, the STA can communicate with the AP. For communication, the communication between STA and STA also relies on AP for relay, similar to the mode of mobile communication base station and mobile phone. Before the authentication and association is performed and the association is successful, data communication between STA and AP, STA and STA cannot be performed. In normal network communication, STA and AP provide authentication, deauthentication, data encryption, and data transmission services. This design scheme has high security. Under normal circumstances, the process of establishing a connection between STA and AP is shown in Figure 1. , that is to artificially control the STA to scan the surrounding APs in an active or passive manner to obtain the information of the surrounding APs, and then the STA manually or automatically enters the key to perform link authentication and establish an association with the AP.

But for some special smart devices, such as some smart devices SD (SmartDevice) without input devices, serial ports, and touch screens, if they want to communicate with APs, the existing technical solutions are helpless. On the other hand, when users use absolutely safe and reliable SD devices to connect to APs, they hope to obtain a faster and more efficient connection solution than the existing technical solutions, but there is no reasonable, fast and efficient solution in the current market. Moreover, in the networking application of smart home, there may usually be many SDs, which will lead to some false networking situations, but this is not what the designer wants to see, so this is also a problem that needs to be solved.

Contents of the invention

In order to overcome the above-mentioned problems in the prior art, the present invention provides a method for quick connection between AP and SD with confirmation function in an unrelated WIFI environment with novel concept, ingenious design, high security and reliability.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A method for fast connection between an AP and an SD with a confirmation function in an unassociated WIFI environment, comprising the following steps:

(S1) The AP extracts its own device information including at least the service set identifier SSID and the key Key;

(S2) The AP encrypts the extracted device information into a data stream including length information, data body and CRC check information;

(S3) The AP embeds the encrypted data stream into at least one broadcast frame in the form of embedded data;

(S4) The AP periodically broadcasts all broadcast frames with embedded data on the current channel in order;

(S5) The user starts the SD quick connection through the confirmation function;

(S6) Configure the SD to monitor mode for a set period of time. In this mode, the SD periodically switches working channels to capture broadcast frames in the current channel; if a broadcast frame is captured within the set time, then Proceed to the next step, otherwise close said SD;

(S7) The SD parses the captured broadcast frame, extracts its embedded data flow information, and obtains the device information of the AP;

(S8) The SD sends a link authentication request to the AP according to the obtained AP device information;

(S9) After receiving the directed link authentication request, the AP associates with the SD to complete the quick connection.

Further, the device information of the AP also includes bandwidth information BANDWIDTH, authentication mode information AUTHENTICATION, encryption and decryption mode information ENCRYPTION, channel information CHANNEL and optional information OPTION.

Specifically, the device information of the AP is encrypted and stored in the data body of the data stream.

In order to ensure data security, in the step (S3), when the data stream is embedded into a plurality of broadcast frames to form a set of broadcast frames to be sent, the format, order and embedding method of these broadcast frames are agreed upon;

Correspondingly, in the step (S7), the SD extracts the corresponding data flow information from the whole group of captured broadcast frames according to the agreement. The specific agreed manner can be implemented by using the existing encoding method, which will not be repeated in the present invention.

To facilitate identification, when the data stream is embedded into multiple broadcast frames, three consecutive broadcast identification frames with fixed length differences are inserted after a certain number of consecutive broadcast frames.

Correspondingly, in the step (S6), after the SD captures the broadcast frames in the current channel, it also verifies the captured multiple continuous broadcast frames, and judges whether there are broadcast identification frames in these continuous broadcast frames, and if so, Then the SD stays on the current channel to receive the complete set of broadcast frames, otherwise the SD switches the working channel to an adjacent channel after a set time. The verification method is to check whether the length difference of any three consecutive broadcast frames in these consecutive broadcast frames conforms to the fixed difference set between the broadcast identification frames.

Further, in order to ensure the accuracy of the content received by the SD, after the SD parses the captured broadcast frame in the step (S7), it judges whether a group of broadcast frames are received completely by verifying the length information in the extracted data stream information, If it is incomplete, the received broadcast frame is discarded and received again.

And, when the group of broadcast frames is completely received, it is judged whether the content of the group of broadcast frames is complete by verifying the CRC check information in the extracted data stream information, and if not complete, discarding the received broadcast frames, And receive it again, if it is complete, go to the next step.

Further, in order to reduce consumption, in the step (S9), after the AP is associated with the SD, the AP stops broadcasting the broadcast frame. When there are multiple SDs that need to be connected quickly, the AP stops broadcasting only after all SDs are associated with the AP.

Correspondingly, after the SD is associated with the AP, the SD is switched to the WIFI transmission mode, and after being disconnected from the AP, the SD is closed. In this way, it avoids unnecessary consumption caused by SD monitoring channel broadcast all the time, and also ensures the stability of the connection.

Compared with the prior art, the present invention has the following beneficial effects:

The invention is cleverly conceived. It utilizes the self-device information actively broadcasted and encrypted by the AP to be detected by the SD and establishes a connection with the AP based on this information. A smart device without an input device associates with the AP, and through the confirmation function, the SD can be turned on or off when needed. On the one hand, it can save energy consumption of the SD, and more importantly, it can reduce the probability of wrong networking of the SD in the process of intelligent networking. , novel and unique, has broad application prospects, and is suitable for popularization and application.

The present invention aims to simplify the process of establishing a connection between SD and AP in the prior art, especially the scanning process and link authentication process: in the prior art, the SD first scans the SSID of the AP and then performs manual or automatic input corresponding After the verification is successful, the two establish a connection; the present invention encrypts and encapsulates the device information of the AP and embeds it in the broadcast frame by processing the AP, and then broadcasts it, and receives the broadcast to the SD under controllable conditions. The key information about the AP can be extracted after the frame, and the key information can be directly associated with the AP, which simplifies the SD access process, shortens the access time, and improves the access efficiency. Among them, the SD device does not need to know the key value of the AP, nor does it need to input the key value of the AP, which is convenient and reliable.

Description of drawings

Fig. 1 is a schematic flow chart of establishing a connection between an AP and an SD in the prior art.

Fig. 2 is a schematic flow chart of the present invention.

Fig. 3 is a schematic diagram of the structure of the data stream and the composition of device information in the present invention.

Fig. 4 is a schematic diagram of encapsulation of broadcast frames in the present invention.

detailed description

The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.

Example

As shown in Figure 2 to Figure 4, the method of fast connection between AP and SD with confirmation function in an unrelated WIFI environment is mainly to solve the problem of smart device SD with no serial port, no touch screen and no input device in the prior art. The problem of being unable to directly establish a connection with the AP, and speeding up the connection efficiency between the safe and reliable SD device and the AP, can adapt to various complex wireless network communication environments, including AD-Hoc networks, BSS networks, and ESS networks; and this method is Based on the 802.11 standard design, it can be extended and compatible with the 802.11 protocol family.

The realization of this method comprises the following steps:

(S1) The AP extracts its own device information including at least the service set identifier SSID and key Key; specifically, the AP device information also includes bandwidth information BANDWIDTH, authentication mode information AUTHENTICATION, encryption and decryption mode information ENCRYPTION, channel Information CHANNEL and optional information OPTION.

(S2) The AP encrypts the extracted device information into a data stream including length information, data body and CRC check information; specifically, the AP's device information is encrypted and stored in the data body.

(S3) The AP embeds the encrypted data stream into at least one broadcast frame in the form of embedded data; when embedding a broadcast frame, it is necessary to agree in advance on the size of the data stream and the position where the broadcast frame is embedded; When multiple broadcast frames constitute a group of broadcast frames, there is no special requirement on the overall size of the data stream, but in order to ensure data security, the format, order and embedding method of these broadcast frames need to be agreed. The specific agreed manner can be implemented by using the existing encoding method, which will not be repeated in the present invention.

To facilitate identification, when the data stream is embedded into multiple broadcast frames, three consecutive broadcast identification frames with fixed length differences are inserted after a certain number of consecutive broadcast frames.

(S4) The AP periodically broadcasts all broadcast frames with embedded data on the current channel in sequence.

(S5) The user starts the SD quick connection through the confirmation function;

(S6) Configure the SD to monitor mode for a set period of time. In this mode, the SD periodically switches working channels to capture broadcast frames in the current channel; if a broadcast frame is captured within the set time, then Proceed to the next step, otherwise close said SD. After the SD captures the broadcast frames in the current channel, it also verifies the captured continuous broadcast frames, and judges whether there are broadcast identification frames in these continuous broadcast frames. If so, the SD stays in the current channel to receive A complete set of broadcast frames, otherwise the SD switches the working channel to an adjacent channel after a set time. The verification method is to check whether the length difference of any three consecutive broadcast frames in these consecutive broadcast frames conforms to the fixed difference set between the broadcast identification frames.

(S7) The SD parses the captured broadcast frame, extracts its embedded data flow information, and obtains the device information of the AP; the SD extracts the corresponding data from the entire group of captured broadcast frames according to the agreement stream information.

In order to ensure the accuracy of the content received by the SD, after the SD parses the captured broadcast frames, it judges whether a group of broadcast frames are received completely by verifying the length information in the extracted data flow information, and discards the received broadcast frames if they are not complete. Received broadcast frames and receive them again.

And, when the group of broadcast frames is completely received, it is judged whether the content of the group of broadcast frames is complete by verifying the CRC check information in the extracted data stream information, and if not complete, discarding the received broadcast frames, And receive it again, if it is complete, go to the next step.

(S8) The SD sends a link authentication request to the AP according to the obtained AP device information.

(S9) After receiving the directed link authentication request, the AP associates with the SD to complete the quick connection. In order to reduce consumption, after the AP associates with the SD, the AP stops broadcasting the broadcast frame. When there are multiple SDs that need to be connected quickly, the AP stops broadcasting only after all SDs are associated with the AP. Correspondingly, after the SD is associated with the AP, the SD is switched to the WIFI transmission mode, and after being disconnected from the AP, the SD is closed. In this way, it avoids unnecessary consumption caused by SD monitoring channel broadcast all the time, and also ensures the stability of the connection.

In practical applications, when a user purchases a smart device applying the present invention, such as a smart router AP and a smart light SD, since the smart light SD has no touch screen, no serial port, and no input device, it cannot directly connect to the AP through operation. At that time, the method of the present invention can be used to generate a broadcast frame and broadcast the data containing its own device information through the AP. The user activates the smart light through the confirmation function. When the smart light SD receives the corresponding broadcast frame, it can quickly complete the connection by associating the extracted AP device information with the AP, thereby realizing the control of the smart light.

The above-described embodiments are only preferred embodiments of the present invention, and are not limitations on the scope of protection of the present invention. However, all changes made by adopting the design principle of the present invention and performing non-creative work on this basis should belong to the protection scope of the present invention. within.

Claims (10)

1. an AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment, it is characterised in that comprise the steps:

(S1) described AP extracts the facility information including at least service set SSID and key Key of self；

(S2) facility information of extraction is encrypted as the data stream comprising length information, data subject and CRC check information by described AP；

(S3) the data stream of encryption is embedded at least one broadcast frame by described AP with the form of embedded data；

(S4) broadcast frame of all embedded data is periodically broadcasted in order by described AP at present channel；

(S5) user is by confirming that function on SD quickly connects；

(S6) it is configured to described SD monitor the one setting period of mode duration, SD periodically switch operating channel in this mode, catches the broadcast frame in present channel；If capturing broadcast frame within this setting time, then carry out next step, otherwise close described SD；

(S7) broadcast frame captured is resolved by described SD, extracts its embedded traffic flow information, it is thus achieved that the facility information of described AP；

(S8) described SD asks to described AP directive sending link authentication according to the AP facility information obtained；

(S9), after described AP receives the link authentication request of directive sending, it is associated with described SD, completes quick connection。

2. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 1, it is characterized in that, the facility information of described Ap also includes bandwidth information BANDWIDTH, authentication mode information AUTHENTICATION, encryption and decryption mode information ENCRYPTION, channel information CHANNEL and optional information OPTION。

3. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 2, it is characterised in that be stored in the data subject of described data stream after the facility information encryption of described AP。

4. a kind of according to any one of claims 1 to 3 AP and have the SD the confirming function method quickly connected under uncorrelated WIFI environment, it is characterized in that, in described step (S3), when described data stream be embedded into multiple broadcast frame constitute broadcast frame one group to be sent time, the form of these broadcast frames, order and embedded mode are arranged；

Correspondingly, in described step (S7), described SD extracts the traffic flow information of correspondence according to a preconcerted arrangement from the whole group of broadcast frame captured。

5. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 4, it is characterized in that, when described data stream is embedded into multiple broadcast frame, after the broadcast frame of continuous some, insert the broadcast identification frame that the difference of 3 length of continuous print is fixing。

6. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 5, it is characterized in that, in described step (S6), SD is after the broadcast frame captured in present channel, also the continuous multiple broadcast frames captured are verified, judge that whether there is broadcast in these continuous print broadcast frames identifies frame, if, then described SD rests on present channel and receives close set broadcast frame, and otherwise working channel is switched to adjacent channel by described SD after another setting time。

7. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 6, it is characterized in that, after in described step (S7), the broadcast frame caught is resolved by SD, by verifying that the length information in the traffic flow information extracted judges whether one group of broadcast frame receives completely, if it is imperfect, then abandon received broadcast frame, lay equal stress on newly received。

8. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 7, it is characterized in that, when described one group of broadcast frame completely receives, by verifying that the CRC check information in the traffic flow information extracted judges that whether the content of this group broadcast frame is complete, if it is imperfect, then abandon received broadcast frame, lay equal stress on newly received, if complete, perform next step。

9. a kind of according to any one of claim 5～8 AP and have the SD the confirming function method quickly connected under uncorrelated WIFI environment, it is characterised in that in described step (S9), after described AP and SD associates, the broadcast of AP termination broadcast frame。

10. a kind of AP and have the method that quickly connects of SD confirming function under uncorrelated WIFI environment according to claim 9, it is characterised in that after described SD and AP associates, described SD switches to WIFI transmission mode, and after disconnecting with AP, closedown SD。