Data transmission method, access point, and station
This application provides a data transmission method. When performing data transmission with a first station in a bandwidth power saving mode by using an operating channel of the first station, an access point performs data transmission with a second station by using an operating channel of the second station. Therefore, even if the operating channel of the first station includes a primary channel, the access point can still perform data transmission with the second station by using another channel. Further, for the access point, although the operating channel of the first station occupies only a part of available bandwidth resources of the access point, the access point can still perform data transmission with the second station by using a remaining channel.
1. An access point comprising a processor and a memory, wherein the memory stores program code, and the processor invokes the program code stored in the memory to execute the following operations:
sending signaling for indicating a first channel set available to a first station,
wherein the first channel set is used for the first station to receive and transmit data only on the first channel set, and
wherein a total bandwidth of the first channel set is less than a bandwidth of channels of the access point available to the first station; and
sending at the same time (i) a trigger frame to each of the first station and a second station for triggering the first and second stations to send data using first and second operating channels, respectively, or (ii) first and second physical layer protocol data units (PPDUs) by using the first and second operating channels, respectively,
wherein the first operating channel is among the first channel set and the second operating channel is among a second available channel set,
wherein the first and second operating channels do not overlap, and
wherein the second channel set includes the channels available to the first station that are not part of the first channel set.
2. The access point according to claim 1 , wherein the second available channel set does not include a primary channel.
3. The access point according to claim 1 , wherein the first operating channel comprises a primary channel for data transmissions of the access point.
4. The access point according to claim 1 , wherein, before sending the signaling for indicating the first channel set available to the first station operating in a power saving mode, the processor invokes the program code stored in the memory to execute:
receiving a request for enabling the power saving mode from the first station; and
sending a request response to the first station.
5. The access point according to claim 4 , wherein the request for enabling the power saving mode from the first station carries the first channel set.
6. A first station comprising a processor and a memory, wherein the memory stores program code, and the processor invokes the program code stored in the memory to execute the following operations:
receiving signaling for indicating a first channel set available to the first station,
wherein the first channel set is used for the first station to receive and transmit data only on the first channel set, and
wherein a total bandwidth of the first channel set is less than a bandwidth of channels of an access point available to the first station; and
receiving (i) a trigger frame for triggering the first station to send data using a first operating channel, or (ii) a first physical layer protocol data unit (PPDU) by using the first operating channel,
wherein the same trigger frame also triggers a second station to send data using a second operating channel, or a second PPDU is received at the same time as the first PPDU, by the second station, by using the second operating channel,
wherein the first operating channel is among the first channel set and the second operating channel is among a second available channel set,
wherein the first and second operating channels do not overlap, and
wherein the second channel set includes the channels available to the first station that are not part of the first channel set.
7. The first station according to claim 6 , wherein the second available channel set does not include a primary channel.
8. The first station according to claim 6 , wherein the first operating channel comprises a primary channel for data transmissions of the access point.
9. The first station according to claim 6 , wherein, before receiving the signaling for indicating the first channel set available to the first station operating in a power saving mode, the processor invokes the program code stored in the memory to execute:
sending a request to the access point; and
receiving a request response and a second signaling that are sent by the access point, wherein the second signaling instructs the first station to enable the power saving mode.
10. The first station according to claim 9 , wherein the request sent by the first station carries the first channel set.
11. A non-transitory, computer readable medium storing a program code that, when executed by a computer, executes instructions that provide the following operations:
receiving signaling for indicating a first channel set available to a first station,
wherein the first channel set is used for the first station to receive and transmit data only on the first channel set, and
wherein a total bandwidth of the first channel set is less than a bandwidth of channels of an access point available to the first station; and
receiving (i) a trigger frame for triggering the first station to send data using a first operating channel, or (ii) a first physical layer protocol data unit (PPDU) by using the first operating channel,
wherein the same trigger frame also triggers a second station to send data using a second operating channel, or a second PPDU is received at the same time as the first PPDU, by the second station, by using the second operating channel,
wherein the first operating channel is among the first channel set and the second operating channel is among a second available channel set,
wherein the first and second operating channels do not overlap, and
wherein the second channel set includes the channels available to the first station that are not part of the first channel set.
12. The non-transitory, computer readable medium according to claim 11 , wherein the second available channel set does not include a primary channel.
13. The non-transitory, computer readable medium according to claim 11 , wherein the first operating channel comprises a primary channel for data transmissions of the access point.