Multichannel access method and apparatus

Abstract

Embodiments of the present application disclose a multichannel access method, including: obtaining a transmission opportunity TXOP of a first reserved channel; sensing a non-reserved channel other than the first reserved channel in a preset time segment in the TXOP, and if the non-reserved channel is in an idle state, using the non-reserved channel as a second reserved channel; and when an ending moment of the preset time segment is reached, sending a current data frame on the first reserved channel and the second reserved channel. Correspondingly, the embodiments of the present application further disclose a multichannel access apparatus. Channel utilization can be improved by implementing the embodiments of the present application.

1 . A multichannel access method comprising:
 obtaining, by a device, a transmission opportunity (TXOP) of a first reserved channel;   sensing, by the device, a non-reserved channel other than the first reserved channel in a preset time segment in the TXOP;   using, by the device, the non-reserved channel in an idle state as a second reserved channel; and   sending a current data frame on the first reserved channel and the second reserved channel.   
     
     
         2 . The method according to  claim 1 , wherein obtaining the TXOP of the first reserved channel comprises:
 triggering, by the device, a backoff procedure when the first reserved channel is sensed to be in the idle state, and, after the backoff procedure ends, determining, by the device, the TXOP of the first reserved channel; or   receiving, by the device, the TXOP of the first reserved channel from a peer device, wherein the TXOP of the first reserved channel is determined by the peer device.   
     
     
         3 . The method according to  claim 1 , wherein before sensing the non-reserved channel in the preset time segment in the TXOP, the method further comprises:
 calculating, by the device, a sending moment of the current data frame in the TXOP, and using the calculated sending moment as the ending moment of the preset time segment.   
     
     
         4 . The method according to  claim 3 , wherein calculating the sending moment of the current data frame in the TXOP comprises:
 determining, by the device, the sending moment of the current data frame according to a start moment of a previous data frame with respect to the current data frame, a duration of the previous data frame, and an interframe space between the previous and current data frames; or   determining, by the device, the sending moment of the current data frame according to an ending moment of the previous data frame, and the interframe space between the previous and current data frames.   
     
     
         5 . The method according to  claim 4 , further comprising:
 adjusting the interframe space between the current and previous data frames so that an adjusted interframe space is greater than or equal to the time length of the preset time segment.   
     
     
         6 . The method according to  claim 4 , further comprising:
 receiving an indication message sent by the peer device, wherein the indication message comprises a target time length; and   adjusting the interframe space between the current data frame and the previous data frame to the target time length according to the indication message, wherein the target time length is greater than or equal to a time length of the preset time segment.   
     
     
         7 . The method according to  claim 1 , wherein the time length of the preset time segment is equal to a point coordination function interframe space (PIFS), a distributed coordination function interframe space (DIFS), an arbitration interframe space (AIFS), or a short interframe space (SIFS). 
     
     
         8 . The method according to  claim 1 , wherein the current data frame is one frame carried by the first and second reserved channels at the same time; or
 the current data frame includes multiple frames separately carried by the first and second reserved channels.   
     
     
         9 . The method according to  claim 1 , including repeating the sensing a non-reserved channel in a preset time segment in a TXOP and using the non-reserved channel in an idle as a second reserved channel for sending a current data frame on second reserved channel and also on the first reserved channel. 
     
     
         10 . A multichannel access apparatus, comprising a processor and a transceiver, the processor and the communicate with each other through an internal connection; and:
 the processor is configured to obtain a transmission opportunity TXOP of a first reserved channel; and   sense a non-reserved channel other than the first reserved channel in a preset time segment in the TXOP, and using a non-reserved channel in an idle state as a second reserved channel; and   the transceiver is configured to send a current data frame on the first reserved channel and the second reserved channel.   
     
     
         11 . The apparatus according to  claim 10 , wherein the obtaining, by the processor, a transmission opportunity TXOP of a first reserved channel comprises:
 when it is sensed that the first reserved channel is in an idle state, triggering a backoff procedure, and after it is detected that the backoff procedure ends, determining the TXOP of the first reserved channel; or   receiving the TXOP, which is sent by a peer device, of the first reserved channel, wherein the TXOP of the first reserved channel is determined by the peer device.   
     
     
         12 . The apparatus according to  claim 10 , wherein the processor is further configured to:
 calculate a sending moment of the current data frame in the TXOP, and use the calculated sending moment as the ending moment of the preset time segment.   
     
     
         13 . The apparatus according to  claim 12 , wherein the calculating, by the processor, a sending moment of the current data frame in the TXOP comprises:
 determining the sending moment of the current data frame according to a start moment of a previous data frame of the current data frame, duration of the previous data frame, and an interframe space between the previous data frame and the current data frame; or   determining the sending moment of the current data frame according to an ending moment of a previous data frame of the current data frame, and an interframe space between the previous data frame and the current data frame.   
     
     
         14 . The apparatus according to  claim 13 , wherein the processor is further configured to:
 adjust the interframe space between the current data frame and the previous data frame, so that the adjusted interframe space is greater than or equal to the time length of the preset time segment.   
     
     
         15 . The apparatus according to  claim 13 , wherein the processor is further configured to:
 receive an indication message sent by the peer device, wherein the indication message comprises a target time length; and adjust the interframe space between the current data frame and the previous data frame to the target time length according to the indication message, wherein the target time length is greater than or equal to a time length of the preset time segment.   
     
     
         16 . The apparatus according to  claim 10 , wherein the time length of the preset time segment is equal to a point coordination function interframe space PIFS, a distributed coordination function interframe space DIFS, an arbitration interframe space AIFS, or a short interframe space SIFS. 
     
     
         17 . The apparatus according to  claim 10 , the current data frame is one frame carried by the first reserved channel and the second reserved channel at the same time; or
 the current data frame are multiple frames separately carried by the first reserved channel and the second reserved channel.   
     
     
         18 . The apparatus according to  claim 10 , wherein the processor is further configured to repeatedly sense a non-reserved channel in a preset time segment in the TXOP and use the non-reserved channel when in an idle state as a second reserved channel to send a current data frame on the second reserved channel and also on the first reserved channel.