Method and device for channel information collection
A channel information and information collection technology, which is applied in the field of channel information collection methods and devices, can solve the problems such as the inability of channel information collectors to effectively obtain transmission opportunities, the inability of channel information collectors to obtain transmission opportunities, and the length of channel information feedback frames. Achieve the effect of improving the success rate, ensuring channel resources, and ensuring rational utilization
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Embodiment 1
[0048] This embodiment is a preferred embodiment of a method for collecting channel information using the embodiment of the present invention. In this embodiment, the channel information collection process mainly includes the following steps:
[0049] Assume that after the channel information collector accesses the access channel, it sends the NDPA carrying three STAs as the first frame of the transmission, and when the transmission is completed, it will obtain this transmission opportunity. After the NDP transmission is completed, it is determined that the transmission fails, and the channel information collector does not detect the signal within the preset time interval. If the specific time delay (such as PIFS) does not exceed the duration of the transmission opportunity, and within the PIFS time, the access channel has been in In the idle state, the channel information sender continues to send the polling frame carrying the next station that needs to feed back channel info...
Embodiment 2
[0051] In this embodiment, it is assumed that the channel information collector sends an NDPA carrying three STAs as the first frame after the channel information collector grants channel access, and obtains the current transmission opportunity after the sending is completed. After the NDP transmission is completed, the channel information collector does not detect the signal within the preset time interval, and determines that the transmission has failed. If the specific time delay (such as PIFS) does not exceed the duration of the transmission opportunity, and within the specific time delay, the channel If it is always in the idle state, the channel information collector will re-send the polling frame to the current feedback failure station, or re-compete for the channel. Retransmissions are no different than initial transmissions when polling other stations. If two consecutive transmissions fail (here the transmission error threshold is assumed to be 2), such as continuous ...
Embodiment 3
[0053] Assume that after the channel information collector allows the channel access, it sends the NDPA carrying one STA as the first frame of the transmission. After the transmission is completed, the transmission opportunity of this time is obtained. After the NDP transmission is completed, the channel information collector receives an error frame and determines that the transmission has failed. If the specific time delay (such as PIFS) does not exceed the duration of the transmission opportunity, and the access channel has been in an idle state during the specific time delay, Then the channel information collector resends NDPA+NDP, otherwise re-competes for the channel. If two consecutive transmissions fail (here, the threshold of transmission errors is assumed to be 2), the channel will be contended for again.
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