Method and system for automatic access to wi-fi network

Abstract

A method for automatically allowing access to a WI-FI network by a mobile device can be applied to a mobile device and a WI-FI access point (AP). The mobile device includes a first microphone, first wireless communicating unit, and first processing unit. The first microphone obtains ambient sound, and the first wireless communicating unit can transmit accessing request. The mobile device can receive a password-generating command from a found WI-FI AP. The WI-FI AP comprises second microphone, second wireless communicating unit, and second processing unit. The second microphone also obtains ambient sound. The second wireless communicating unit receives the accessing request and transmits the password-generating command. The second processing unit generates an AP password according to the ambient sound and can compare a device password received from the mobile device. The mobile device is allowed to access the WI-FI AP when the device password matches with the AP password.

What is claimed is: 
     
         1 . A mobile device connecting with a WI-FI access point, the mobile device comprising:
 a microphone, obtaining a first sound information;   a communicating unit, transmitting an accessing command, receiving a password-generating command, transmitting a first password and receiving a second password wherein the second password is generated from a second sound information by the WI-FI access point;   a processing unit, obtaining the first sound information from to the microphone, generating the first password from the first sound information according to the password-generating command, and comparing the first password with the second password, wherein the processing unit set the mobile device be permitted to access the WI-FI access point if the first password matches with the second password.   
     
     
         2 . The mobile device of  claim 1 , wherein the password-generating command comprises a parameter of start time and a parameter of sampling frequency, the processing unit obtains sampling time of the first sound information according to the parameter of start time. 
     
     
         3 . The mobile device of  claim 2 , wherein the processing unit obtains values of the first sound information on N sampling points according to the sampling time and the parameter of sampling frequency, a first 1 st  string is obtained by a value of 1 st  sampling point of the first sound information subtract a value of initial sampling point of the first sound information, a first N th  string is obtained by a value of N th  sampling point of the first sound information subtract a value of N−1 th  sampling point of the first sound information, N being a positive integer greater than 0, the first password is generated by making cyclic redundancy check (CRC) transformation with a string which strings by the first 1 st  string to the first N th  string. 
     
     
         4 . The mobile device of  claim 1 , wherein the mobile device is permitted to access a WI-FI access point in a period of time, the first password becomes invalid by the processing unit when the mobile device has accessed the WI-FI access point over the period of time, the mobile device transmits the accessing request to the WI-FI access point when the mobile device is disconnected by the WI-FI access point. 
     
     
         5 . A WI-FI access point, comprising:
 a communicating unit, receiving an accessing request, transmitting a password-generating command and receiving a first password wherein the first password is generated from a first sound information by a mobile device;   a microphone, obtaining a second sound information;   a processing unit, obtaining the accessing request and the first password according the communicating unit, obtaining the second sound information from the microphone, generating a second password from the second sound information according to the password-generating command, comparing the first password with the second password, wherein the processing unit set the mobile device be permitted to access the WI-FI access point if the first password matches with the second password.   
     
     
         6 . The WI-FI access point of  claim 5 , wherein the password-generating command comprises a parameter of start time and a parameter of sampling frequency, the processing unit obtains sampling time of the second sound information according to the parameter of start time. 
     
     
         7 . The WI-FI access point of  claim 6 , wherein the processing unit obtains values of the second sound information on N sampling points according to the sampling time and the parameter of sampling frequency, a second 1 st  string is obtained by a value of 1 st  sampling point of the second sound information subtract a value of initial sampling point of the second sound information, a second N th  string is obtained by a value of N th  sampling point of the second sound information subtract a value of N−1 th  sampling point of the second sound information, N being a positive integer greater than 0, the second password is generated by making cyclic redundancy check (CRC) transformation with a string which strings by the second 1 st  string to the second N th  string. 
     
     
         8 . The WI-FI access point of  claim 5 , wherein the WI-FI access point is permitted to access in a period of time, the first password becomes invalid by the processing unit when the mobile device has accessed the WI-FI access point over the period of time, the mobile device transmits the accessing request to the WI-FI access point when the mobile device is disconnected by the WI-FI access point. 
     
     
         9 . A method of automatically access to WI-FI network, the method comprising:
 transmitting an accessing request to a WI-FI access point by a mobile device;   receiving the accessing request by the WI-FI access point;   obtaining a first sound information of an ambience of the mobile device by a first microphone;   obtaining a second sound information of an ambience of the WI-FI access point by a second microphone;   generating a first password from the first sound information by the mobile device;   generating a second password from the second sound information by the WI-FI access point;   transmitting the first password to the WI-FI access point by the mobile device;   receiving the first password by the WI-FI access point;   comparing the first password and the second password; and   permitting the mobile device to access the WI-FI access point if the first password matches with the second password.   
     
     
         10 . The method of  claim 9 , wherein the mobile device is permitted to access the WI-FI access point in a period of time, the method further comprising:
 invalidating the first password when the mobile device has accessed the WI-FI access point longer than the period of time, and   transmitting, by the mobile device, the accessing request to the WI-FI access point when the mobile device is disconnected by the WI-FI access point.