Transmission control method and apparatus for avoiding data collision
地域：
Guangdong
摘要
Transmission control methods and devices for avoiding data collision are provided. According to the methods, a first radio frame is generated by a first station. The first radio frame includes a physical layer preamble, a null instruction information domain and a data section. The null instruction information domain is used for triggering an access point in another basic service set. The basic service set receives the first radio frame to send a second radio frame. The second radio frame indicates a time for reserving a channel. According to the methods, the first radio frame is sent by the first station.
說明書
This application is based upon and claims priority to PCT Application No. PCT/CN2016/085902, filed Jun. 15, 2016, which is based upon and claims priority to Chinese Patent Application No. 201510443007.5, filed Jul. 24, 2015, the entire contents of which are incorporated herein by reference.
The present disclosure relates to, but not limited to, the wireless communication filed, and more particularly to transmission control methods and devices for avoiding data collision.
At present, data communications using Wireless Local Area Networks (WLANs) have become very common, and the demand for WLAN coverage across the world is increasing. The Institute of Electrical and Electronic Engineers (IEEE) industry standard 802.11 group has defined a series of standards such as 802.11a/b/g/n/ac to meet the increasing communication needs.
In an Orthogonal Frequency Division Multiplexing (OFDM) system, the basic structure of a radio frame is shown in
權(quán)利要求
What is claimed is:1. A transmission control method for avoiding data collision, comprising:generating, by a first station in a first basic service set, a first radio frame comprising a physical layer preamble, a null instruction information domain and a data section, wherein the null instruction information domain is used for triggering an access point, which is in a second basic service set other than the first basic service set and has received the first radio frame, to send a second radio frame indicating a first time for reserving a channel; and sending, by the first station, the first radio frame so that the access point which is in the second basic service set and has received the first radio frame sends the second radio frame after a particular time interval after starting of the null information instruction domain of the first radio frame to a second station associated with the access point in the second basic service set to indicate the second station not sending data through the reserved channel during the first time. 2. The method according to claim 1 , wherein the physical layer preamble in the first radio frame comprises at least one of information indicating whether the null instruction information domain is carried, a length of the null instruction information domain, and a starting position of the null instruction information domain. 3. The method according to claim 1 , wherein the null instruction information domain is discarded or ignored by a destination station of the first radio frame; wherein the destination station of the first radio frame resides in the first basic service set. 4. The method according to claim 1 , wherein the null instruction information domain is located between the physical layer preamble and the data section of the first radio frame, or between a signaling field and a short training sequence domain of the physical layer preamble of the first radio frame. 5. The method according to claim 1 , wherein the physical layer preamble of the first radio frame indicates duration of the first radio frame;wherein a stopping time of the first time indicated by the second radio frame for reserving the channel is the same with a stopping time of the first radio frame. 6. The method according to claim 1 , wherein the physical layer preamble in the first radio frame indicates a second time for reserving the channel;wherein a stopping time of the first time indicated by the second radio frame for reserving the channel is the same with a stopping time of the second time indicated by the first radio frame for reserving the channel. 7. The method according to claim 1 , wherein before the generation of the first radio frame by the first station, the method further comprises:detecting, by the first station, a signal strength of the second basic service set, and determining, by the first station, the signal strength of the second basic service set exceeds a preset threshold. 8. A transmission control method for avoiding data collision, comprising:receiving, by an access point in a second basic service set, a first radio frame generated and sent by a first station in a first basic service set; wherein the first radio frame comprises a physical layer preamble, a null instruction information domain and a data section, and the null instruction information domain is used for triggering the access point, which is in the second basic service set other than the first basic service set and has received the first radio frame, to send a second radio frame indicating a first time for reserving a channel; and sending, by the access point in the second basic service set, the second radio frame after a particular time interval after starting of the null information instruction domain of the first radio frame to a second station associated with the access point in the second basic service set to indicate the second station not sending data through the reserved channel during the first time. 9. The method according to claim 8 , wherein before sending, by the access point, the second radio frame after the particular time interval after starting of the null information instruction domain of the first radio frame to the second station, the method further comprises:detecting, by the access point, a signal strength of the received first radio frame, and determining, by the access point, the strength of the first radio frame exceeds a preset threshold. 10. The method according to claim 8 , wherein the second radio frame is a CTS-TO-SELF frame. 11. The method according to claim 8 , wherein the second radio frame is a physical layer frame. 12. The method according to claim 8 , wherein a stopping time of the first time indicated by the second radio frame for reserving the channel is the same with a stopping time of the first radio frame, or a stopping time of the first time indicated by the second radio frame for reserving the channel is the same with a stopping time of a second time indicated by the first radio frame for reserving the channel. 13. The method according to claim 8 , wherein receiving identification carried in the second radio frame is broadcast identification or identification of the access point. 14. A transmission control device for avoiding data collision, provided in a first station in a first basic service set, comprising:a processor; and a memory storing instructions executable by the processor; wherein the processor is configured to: generate a first radio frame comprising a physical layer preamble, a null instruction information domain and a data section, wherein the null instruction information domain is used for triggering an access point, which is in a second basic service set other than the first basic service set and has received the first radio frame, to send a second radio frame indicating a time for reserving a channel; and the transmission control device further comprises a wireless transmission chip configured to send the first radio frame so that the access point which is in the second basic service set and has received the first radio frame sends the second radio frame after a particular time interval after starting of the null information instruction domain of the first radio frame to a second station associated with the access point in the second basic service set to indicate the second station not sending data through the reserved channel during the time. 15. The device according to claim 14 , wherein the processor is further configured todetect a signal strength of the second basic service set; and determine the signal strength of the second basic service set exceeds a preset threshold. 16. A transmission control device for avoiding data collision, provided in an access point in a second basic service set, comprising:a processor; a memory storing instructions executable by the processor; and a wireless transmission chip configured to receive a first radio frame generated and sent by a first station in a first basic service set; wherein the first radio frame comprises a physical layer preamble, a null instruction information domain and a data section, and the null instruction information domain is used for triggering the access point, which is in the second basic service set other than the first basic service set and has received the first radio frame, to send a second radio frame indicating a time for reserving a channel; wherein the processor is configured to: instruct the wireless transmission chip to send the second radio frame after a particular time interval after starting of the null information instruction domain of the first radio frame to a second station associated with the access point in the second basic service set to indicate the second station not sending data through the reserved channel during the time. 17. The device according to claim 16 , wherein the processor is further configured todetect a signal strength of the received first radio frame; and determine the strength of the first radio frame exceeds a preset threshold.
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