Determining data transmit power based on estimated signal attenuation
A method and apparatus for transmitting data are provided. The method includes: when detecting that there is a wireless frame currently being transmitted on a working channel, the first sender estimates a signal attenuation between the first sender and a first receiver for the wireless frame currently being transmitted to obtain an estimation result, and determines a transmitting power of the first sender according to the estimation result; and the first sender sends a wireless frame to a second receiver with the determined transmitting power.
1. A method for transmitting data, comprising:
detecting, by a first sender, that there is a first wireless frame currently being transmitted on a working channel, wherein the first wireless frame currently being transmitted is from a second sender to a first receiver or is from the first receiver to the second sender;
determining, by the first sender, that a transmitting power of the first sender is less than or equal to a transmitting power corresponding to a sum of a preset threshold and a path loss; wherein the preset threshold is an acceptable interference power of the first receiver, the path loss is a difference value between a transmitting power of the first receiver and a received power of a wireless frame sent by the first receiver and received by the first sender; and
sending, by the first sender, a wireless frame to a second receiver with the determined transmitting power.
2. The method according to claim 1 , wherein before determining, by the first sender, that a transmitting power of the first sender is less than or equal to a transmitting power corresponding to a sum of a preset threshold and a path loss, the method further comprises:
determining, by the first sender, that the first wireless frame currently being transmitted is not transmitted between stations in a basic service set, BSS, in which the first sender is located.
3. The method according to claim 1 , wherein time for which the first sender sends the wireless frame to the second receiver with the determined transmitting power is less than or equal to duration time of the first wireless frame currently being transmitted.
4. The method according to claim 1 , wherein the first wireless frame sent by the first receiver carries the transmitting power of the first receiver and the preset threshold.
5. The method according to claim 1 , wherein the first wireless frame sent by the second sender carries the transmitting power of the first receiver.
6. The method according to claim 1 , wherein before the first sender sends the wireless frame to the second receiver with the determined transmitting power, the method further comprises:
sending, by the first sender, a request frame to the second receiver with the determined transmitting power; and
receiving a response frame from the second receiver.
7. An apparatus for transmitting data comprising a processor and memory storing instructions which, when being implemented by the processor, enable the processor to:
when detecting that there is a first wireless frame currently being transmitted on a working channel, determine that a transmitting power of the apparatus is less than or equal to a transmitting power corresponding to a sum of a preset threshold and a path loss; wherein the first wireless frame currently being transmitted is from a second sender to a first receiver or is from the first receiver to the second sender, the preset threshold is an acceptable interference power of the first receiver, the path loss is a difference value between a transmitting power of the first receiver and a received power of a wireless frame sent by the first receiver and received by the first sender; and
send a wireless frame to a second receiver with the determined transmitting power.
8. The apparatus according to claim 7 , wherein the processor is further configured to:
when detecting that there is the first wireless frame currently being transmitted on the working channel, determine whether the first wireless frame currently being transmitted is not transmitted between stations in a basic service set, BSS, in which the apparatus is located, if yes, determine that the transmitting power of the apparatus is less than or equal to the transmitting power corresponding to the sum of the preset threshold and the path loss.
9. The apparatus according to claim 7 , wherein the processor is further configured to:
send a request frame to the second receiver with the determined transmitting power, and receive a response frame from the second receiver, and transmit data to the second receiver during duration time of the first wireless frame currently being transmitted with the determined transmitting power.