Frequency Band Switching Method and Terminal

Abstract

A switching method is applied to a terminal that supports WiFi communication on at least two frequency bands. When the terminal and a first Access Point (AP) transmit information by using a first frequency band, a request for establishing a connection between the terminal and a second AP by using a second frequency band is sent to the second AP. When a success message that is fed back by the second AP according to the connection request is received, the terminal establishes a connection with the second AP by using the second frequency band, and then sends, to the first AP, an instruction of breaking a connection between the terminal and the first AP.

What is claimed is: 
     
         1 . A frequency band switching method for a terminal supporting WiFi communication on at least two frequency bands, the method comprising:
 sending a connection request to a second Access Point (AP) while the terminal is connected with a first AP by using a first frequency band; and   in response to determining that a success message fed back by the second AP according to the connection request is received, establishing, by the terminal, the connection with the second AP by using a second frequency band, and then sending a disconnection instruction to the first AP to break a connection between the terminal and the first AP.   
     
     
         2 . The method according to  claim 1 , wherein the terminal is still connected with the first AP by using the first frequency band when the terminal established a connection with the second AP by using the second frequency band. 
     
     
         3 . The method according to  claim 1 , wherein the terminal is only connected with the second AP by using the second frequency band after the terminal breaks the connection between the terminal and the first AP. 
     
     
         4 . The method according to  claim 1 , before sending the connection request, the method further comprising:
 detecting a value of a channel quality parameter group of the first frequency band, wherein the channel quality parameter group of the first frequency band comprises at least one channel quality parameter, the at least one channel quality parameter indicating a channel quality of the first frequency band.   
     
     
         5 . The method according to  claim 4 , wherein the channel quality parameter group comprises a received signal strength indicator (RSSI), a physical layer working rate (RATE), and a packet error rate (PER). 
     
     
         6 . The method according to  claim 1 , wherein the first frequency band comprises 5 GHz, and wherein the second frequency band comprises 2.4 GHz. 
     
     
         7 . A frequency band switching terminal supporting WiFi communication on at least two frequency bands, the terminal comprising:
 at least one processor; and   a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the terminal to perform operations comprising:
 sending a connection request to a second Access Point (AP) while the terminal is connected with a first AP by using a first frequency band; and 
 in response to determining that a success message fed back by the second AP according to the connection request is received, establishing, by the terminal, the connection with the second AP by using a second frequency band, and then sending a disconnection instruction to the first AP to break a connection between the terminal and the first AP. 
   
     
     
         8 . The frequency band switching terminal according to  claim 7 , wherein the terminal is still connected with the first AP by using the first frequency band when the terminal established a connection with the second AP by using the second frequency band. 
     
     
         9 . The frequency band switching terminal according to  claim 7 , wherein the terminal is only connected with the second AP by using the second frequency band after the terminal breaks the connection between the terminal and the first AP. 
     
     
         10 . The frequency band switching terminal according to  claim 7 , before sending the connection request, the operations further comprising:
 detecting a value of a channel quality parameter group of the first frequency band, wherein the channel quality parameter group of the first frequency band comprises at least one channel quality parameter, the at least one channel quality parameter indicating a channel quality of the first frequency band.   
     
     
         11 . The frequency band switching terminal according to  claim 10 , wherein the channel quality parameter group comprises a received signal strength indicator (RSSI), a physical layer working rate (RATE), and a packet error rate (PER). 
     
     
         12 . The frequency band switching terminal according to  claim 7 , wherein the first frequency band comprises 5 GHz, and the second frequency band comprises 2.4 GHz. 
     
     
         13 . A frequency band switching system, comprising:
 a first Access Point (AP) adapted for providing an access signal of a first frequency band;   a second AP adapted for providing an access signal of a second frequency band;   a terminal adapted for sending a connection request to the second AP while the terminal is connected with the first AP by using the first frequency band, and in response to determining that a success message fed back by the second AP according to the connection request is received, establishing, by the terminal, the connection with the second AP by using the second frequency band, and then sending a disconnection instruction to the first AP to break a connection between the terminal and the first AP.   
     
     
         14 . The frequency band switching system according to  claim 13 , wherein the terminal is still connected with the first AP by using the first frequency band when the terminal established a connection with the second AP by using the second frequency band. 
     
     
         15 . The frequency band switching system according to  claim 13 , wherein the terminal is only connected with the second AP by using the second frequency band after the terminal breaks the connection between the terminal and the first AP. 
     
     
         16 . The frequency band switching system according to  claim 13 , wherein before the terminal sends the connection request, the terminal detects a value of a channel quality parameter group of the first frequency band, and wherein the channel quality parameter group of the first frequency band comprises at least one channel quality parameter, the at least one channel quality parameter indicating a channel quality of the first frequency band. 
     
     
         17 . The frequency band switching system according to  claim 16 , wherein the channel quality parameter group comprises a received signal strength indicator (RSSI), a physical layer working rate (RATE), and a packet error rate (PER). 
     
     
         18 . The frequency band switching system according to  claim 13 , wherein the first frequency band comprises 5 GHz, and the second frequency band comprises 2.4 GHz.