CN112118636A - Wireless data transmission method, access point and client - Google Patents
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Abstract
The embodiment of the invention provides a wireless data transmission method, an access point and a client, wherein the method comprises the following steps: acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list; and for each STA scheduling, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length. The wireless data transmission method, the access point and the client provided by the embodiment of the invention combine the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can transmit data at any time, the problem of node hiding is solved, and the data stream is transmitted in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
Description
Technical Field
The present invention relates to the field of wireless transmission technologies, and in particular, to a wireless data transmission method, an access point, and a client.
Background
In 802.11 wlan, the medium access control sublayer (MAC layer) protocol uses carrier sense multiple access with collision avoidance (CSMA/CA) protocol, and the client STA must first sense whether other nodes are transmitting data before transmitting data. If there are other nodes transmitting data, the STA retreats for a period of time and then tries to transmit data, thereby avoiding collision. However, when there are STAs in the 802.11 wlan far apart from each other or there is an obstacle blocking signal transmission in the middle of the STAs, the STAs will not listen to the other side's signal, and then the STAs are "hidden nodes", and when the STAs that are "hidden nodes" transmit data to an Access Point (AP) at the same time, collision occurs at the AP, resulting in data transmission failure and system performance degradation.
Fig. 1 is a schematic diagram of a plurality of STAs being hidden nodes with each other in the prior art, where the prior solution To fig. 1 mainly adopts an RTS/CTS solution, and specifically, the STA sends a request To send frame RTS (request To send) To the AP before sending a data frame. The transmission medium occupation time (duration) of a data frame to be transmitted is described in the RTS frame. The AP responds a Clear To Send (CTS) frame To the STA after receiving the RTS frame. The CTS frame is also accompanied by the duration of a data frame to be transmitted by the STA (this data is copied from the RTS frame to the CTS frame). The STA may send its data frame upon receiving the CTS frame. The STAs that receive the CTS and are not addressed to them will remain silent until the duration accompanied by the CTS is over.
However, the above prior art schemes have a problem that a plurality of STAs may simultaneously transmit an RTS frame and generate a collision on a channel for communication between an AP and the STAs, which may cause a decrease in system performance, and therefore a new wireless data transmission method is needed to solve the above problem.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a wireless data transmission method, an access point, and a client, which overcome the above problems or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a wireless data transmission method, including:
acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list;
and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
In a second aspect, an embodiment of the present invention further provides a wireless data transmission method, including:
detecting channel control information when an Access Point (AP) schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP has sent a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA;
and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
In a third aspect, an embodiment of the present invention provides an access point, including:
the system comprises an acquisition module, a scheduling module and a processing module, wherein the acquisition module is used for acquiring a current accessed client STA list and scheduling each STA in sequence according to the sequence of the STA list;
and the scheduling module is used for sending a Burst data stream to the scheduled STA for each STA scheduling, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that a non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
A fourth aspect of the present invention provides a client, including:
the detection module is used for detecting channel control information when the AP schedules the STA, and acquiring a destination address of the channel control information after confirming that the AP sends a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA;
and the silence module is used for setting a local NAV to be the size of the preset time length and keeping silence in the preset time length if the destination address of the channel control information is different from the local address.
Fifth aspect an embodiment of the present invention provides an electronic device, including:
a processor, a memory, a communication interface, and a bus; the processor, the memory and the communication interface complete mutual communication through the bus; the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the wireless data transmission method.
A sixth aspect of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions for causing a computer to execute the above wireless data transmission method.
The wireless data transmission method, the access point and the client provided by the embodiment of the invention combine the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can transmit data at any time, the problem of node hiding is solved, and the data stream is transmitted in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a plurality of STAs being hidden nodes with each other in the prior art;
fig. 2 is a flowchart illustrating a wireless data transmission method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating another wireless data transmission method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an access point according to an embodiment of the present invention;
FIG. 5 is a block diagram of an electronic device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a client according to an embodiment of the present invention;
fig. 7 is a block diagram of another electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic flow chart of a wireless data transmission method according to an embodiment of the present invention, as shown in fig. 2, including:
201. acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list;
202. and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
It should be noted that the execution subject of the embodiment of the present invention is an access point AP, and it can be understood that the embodiment of the present invention combines a polling technology and a virtual carrier sensing technology to solve the hidden node problem. The polling technique is that the AP selects a scheduled STA from a list of currently accessed STAs and transmits a scheduling frame to the STA, the scheduling frame carries a corresponding transmission window time allocated to the current STA, the STA transmits uplink data within the corresponding transmission window time after receiving the scheduling frame, and the AP does not schedule the STA or must stop transmitting data after the transmission window of the STA is used up. Virtual carrier sensing is a method of carrier sensing, which is a method of sensing a channel by monitoring channel control information of a channel, as opposed to physical carrier sensing, rather than actually detecting a physical channel. Virtual carrier sensing is provided by a Network Allocation Vector (NAV). The NAV itself is a timer used to set how much time the medium will take, in microseconds. The ue sets NAV according to the received control frame, and starts to count down the NAV, and when the NAV is not zero, it indicates that the medium is busy.
Specifically, in step 201 of the embodiment of the present invention, based on the polling technique, the AP according to the embodiment of the present invention may also select a scheduled STA from the list of currently accessed STAs and send a scheduling frame to the scheduled STA, where it is to be noted that the selection of the scheduled STAs according to the embodiment of the present invention is performed sequentially according to the sequence of the STA list.
Further, in step 202, the embodiment of the present invention also sends a scheduling frame to the scheduled STA in the STA scheduling process, but the scheduling frame sent in the embodiment of the present invention is sent in a manner carried by the end of the Burst data stream, it can be understood that data is sent in a Burst mode, which may make the minimum interval between the data frame and the data frame in the 802.11 standard, and may effectively prevent other devices from sending data during the data sending period of the AP. Furthermore, the end of the Burst data stream provided in the embodiment of the present invention carries a transmission medium occupation time data scheduling frame with a preset duration. In all embodiments of the present invention, the transmission medium occupation time DATA scheduling frame with the preset duration refers to a NULL DATA scheduling frame with duration T, where T is the preset duration in the embodiments of the present invention. Combining with virtual carrier technology, when AP carries out data scheduling, STA can real-time detect channel state and obtain channel control information, when STA detects channel control information and judges whether destination address of the channel control information is self address, if the destination address of the channel control information is not self STA, STA can extract transmission medium occupation time (duration) field in control frame, if duration is greater than NAV residual time, duration is set into NAV timer. Thus, the NAV of the non-scheduled STA can be set to T, and silence is maintained during T time, while the NAV of the scheduled STA does not change, so that only the scheduled STA can transmit data during T time, and the non-scheduled STA cannot transmit, so as to solve the problem of hidden nodes. Preferably, T is set to 5ms, and 10ms can achieve a relatively good effect.
The wireless data transmission method provided by the embodiment of the invention combines the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can transmit data at any time, the problem of node hiding is solved, and the data stream is transmitted in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
On the basis of the above embodiment, the method further includes:
and if the downlink data belonging to the scheduled STA is not detected when the STA is scheduled, directly sending the transmission medium occupied time data scheduling frame with the preset time length to the scheduled STA.
As can be seen from the contents of the foregoing embodiments, in an embodiment of the present invention, the NULL DATA schedule frame whose duration is T is carried at the end of the Burst DATA stream for transmission, and the Burst DATA stream is a downlink DATA stream belonging to the scheduled STA and transmitted in a Burst mode. However, if downlink DATA belonging to the scheduled STA is not found on the AP, the embodiment of the present invention directly sends the NULL DATA scheduling frame whose duration is T to the scheduled STA, thereby ensuring that subsequent virtual carrier sensing can be successfully performed.
On the basis of the above embodiment, the method further includes:
and adjusting the preset duration according to the priority of the scheduled STA.
It is understood that different STAs may have different priority levels, and preferably, the embodiment of the present invention may correspond to each STA with different priority levels by adjusting the size of the preset duration T. For example: the duration T carried in the NULL DATA scheduling frame sent by the AP is the sending window of the STA, the time that the channel is monopolized by the STA can be adjusted by adjusting the size of the T value, a large T value can be allocated to the STA with high priority, and a small T value is allocated to the STA with low priority.
On the basis of the above embodiment, said sequentially scheduling each STA according to the order of the STA list includes:
based on a complete fairness algorithm, acquiring a target STA from the top of the STA list for scheduling;
after the target STA scheduling is completed, the target STA is removed from the top of the STA list and is inserted into the bottom of the STA list.
Preferably, when the STA scheduling is selected in sequence from the STA list, the embodiment of the present invention uses a full fairness algorithm, the AP selects an STA from the currently associated STA linked list, obtains an STA from the top of the STA linked list using the full fairness algorithm, and removes the STA from the top of the STA linked list and inserts the STA into the bottom of the STA list. The STA linked list is the STA list in the embodiment of the present invention.
Fig. 3 is a schematic flow chart of another wireless data transmission method according to an embodiment of the present invention, as shown in fig. 3, including:
301. detecting channel control information when an AP schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP sends a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA;
302. and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
It should be noted that the execution subject of the embodiment of the present invention is the client STA. It can be understood that, the embodiment of the present invention employs a virtual carrier monitoring technique at the client, and controls whether the STA transmits data or not by using the NAV value.
Specifically, in step 301, the embodiment of the present invention employs a virtual carrier monitoring technique to monitor the state of the channel scheduled by the AP and the STA, where the monitored information is channel control information in the embodiment of the present invention, and the STA detects the channel control information, detects and determines whether the AP is scheduled, and after it is determined that the AP has sent a Burst data stream to the scheduled STA, acquires a scheduled destination address, that is, a destination address of the channel control information in the embodiment of the present invention, and finally compares the destination address with a local address.
Further, in step 302, if it is detected that the destination address of the channel control information is not the address of the local STA, the STA extracts the duration field in the control frame, and sets the duration to the NAV timer if the duration is greater than the NAV remaining time. The NAV of the non-scheduled STAs is thus set to T, and silence, i.e., no data can be transmitted, is maintained for the next T time.
The wireless data transmission method provided by the embodiment of the invention combines the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can transmit data at any time, the problem of node hiding is solved, and the data stream is transmitted in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
On the basis of the above embodiment, the method further includes:
and if the destination address of the channel control information is the same as the local address, keeping the local NAV unchanged, and sending uplink data to the AP within the preset time length.
As can be seen from the above description of the embodiments, for non-scheduled STAs, the NAV is set to T, so that silence is maintained for the next T time, while for scheduled STAs, the NAV will remain unchanged, and when the NAV is reduced to 0, the scheduled STAs can transmit data.
The embodiment of the invention essentially comprises the following steps when in wireless data transmission:
step S1, the AP selects an STA from the currently associated STA linked list, may use a full fairness algorithm, obtains an STA from the head of the STA linked list, and removes the STA from the head of the STA linked list.
Step S2, the data linked list of the STA acquired in step S1 is determined, and if the data linked list of the STA contains data, the process proceeds to step S3, and if the data linked list of the STA is empty, the process proceeds to step S4 directly.
Step S3, the AP sends data to the scheduled STA in Burst mode, where the data frame is the minimum interval in the 802.11 standard in Burst mode, so as to effectively prevent other devices from sending data during the period when the AP sends data.
Step S4, the AP sends a null data scheduling frame with duration T, the destination address being the STA acquired in step S1, so that the NAV of all devices within the AP coverage (except the STA selected in step S1) is set to T, and the silence of T time is maintained; since the destination address of the schedule frame is the STA selected in step S1, the NAV of the STA remains unchanged, and continues to count down, and when the NAV of the STA is counted down to 0, the STA will transmit the data in its data queue according to the 802.11 protocol. I.e. the channel is exclusive to this STA for the next T time.
Step S5, the AP waits for T time since the transmission of the scheduling frame in step S4 is completed, the channel in this T time is exclusive to the STA selected in step S1, the uplink data of the STA is transmitted to the AP in this time, and after the T time elapses, the STA acquired in step S1 is inserted to the end of the STA linked list, and step S1 is re-entered to start scheduling of the next STA.
Because the uplink data of the STA is transmitted in the channel exclusive period after the STA is scheduled, the problem of 'hidden nodes' is avoided.
Fig. 4 is a schematic structural diagram of an access point according to an embodiment of the present invention, as shown in fig. 4, including: an obtaining module 401 and a scheduling module 402, wherein:
the obtaining module 401 is configured to obtain a currently accessed client STA list, and sequentially schedule each STA according to an order of the STA list;
the scheduling module 402 is configured to send a Burst data stream to a scheduled STA for each scheduling of the STA, where a terminal of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset duration, and the Burst data stream is a downlink data stream that is sent in a Burst mode and belongs to the scheduled STA, so that a non-scheduled STA sets a local network allocation vector NAV to the preset duration and keeps silent within the preset duration.
Specifically, how to use the obtaining module 401 and the scheduling module 402 to execute the technical solution of the embodiment of the wireless data transmission method shown in fig. 2 is similar, and the implementation principle and the technical effect are not described herein again.
The access point provided by the embodiment of the invention combines the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can send data at any time, the problem of node hiding is solved, and the data stream is sent in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
On the basis of the above embodiment, the access point further includes:
and the direct sending module is used for directly sending the transmission medium occupied time data scheduling frame with the preset duration to the scheduled STA if the downlink data belonging to the scheduled STA is not detected during the scheduling of the STA.
On the basis of the above embodiment, the access point further includes:
and the adjusting module is used for adjusting the size of the preset duration according to the priority of the scheduled STA.
On the basis of the foregoing embodiment, the obtaining module is specifically configured to:
based on a complete fairness algorithm, acquiring a target STA from the top of the STA list for scheduling;
and after the target STA is scheduled, removing the target STA from the top of the STA list, and inserting the target STA into the tail of the STA list.
An embodiment of the present invention provides an electronic device, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein:
fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention, and referring to fig. 5, the electronic device includes: a processor (processor)501, a communication Interface (Communications Interface)502, a memory (memory)503, and a bus 504, wherein the processor 501, the communication Interface 502, and the memory 503 are configured to communicate with each other via the bus 504. The processor 501 may call logic instructions in the memory 503 to perform the following method: acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list; and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list; and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list; and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
Fig. 6 is a schematic structural diagram of a client according to an embodiment of the present invention, as shown in fig. 6, including: a detection module 601 and a silence module 602, wherein:
the detection module 601 is configured to detect channel control information when an AP schedules an STA, and acquire a destination address of the channel control information after confirming that the AP has sent a Burst data stream to a scheduled STA, where a tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset duration, and the Burst data stream is a downlink data stream that is sent in a Burst mode and belongs to the scheduled STA;
the silence module 602 is configured to set a local NAV to the preset duration if the destination address of the channel control information is different from the local address, and keep silent within the preset duration.
Specifically, how to use the detection module 601 and the silence module 602 to execute the technical solution of the wireless data transmission method embodiment shown in fig. 3 is similar, and the implementation principle and the technical effect thereof are not described herein again.
The client provided by the embodiment of the invention combines the characteristics of polling and virtual carrier monitoring NAV, so that only the AP and the scheduled STA can send data at any time, the problem of node hiding is solved, and the data stream is sent in a Burst mode, thereby ensuring that a channel is not preempted by other equipment.
On the basis of the above embodiment, the client further includes:
and the sending module is used for keeping a local NAV unchanged if the destination address of the channel control information is the same as the local address, and sending uplink data to the AP within the preset time length.
An embodiment of the present invention provides an electronic device, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein:
fig. 7 is a block diagram of a structure of another electronic device according to an embodiment of the present invention, and referring to fig. 7, the electronic device includes: a processor (processor)701, a communication Interface (Communications Interface)702, a memory (memory)703 and a bus 704, wherein the processor 701, the communication Interface 702 and the memory 703 complete communication with each other through the bus 704. The processor 701 may call logic instructions in the memory 703 to perform the following method: detecting channel control information when an Access Point (AP) schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP has sent a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA; and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: detecting channel control information when an Access Point (AP) schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP has sent a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA; and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: detecting channel control information when an Access Point (AP) schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP has sent a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA; and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to each embodiment or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of wireless data transmission, comprising:
acquiring a current accessed client STA list, and scheduling each STA in sequence according to the sequence of the STA list;
and for each scheduling of the STA, sending a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that the non-scheduled STA can set a local network allocation vector NAV to be the size of the preset time length and keep silence in the preset time length.
2. The method of claim 1, further comprising:
and if the downlink data belonging to the scheduled STA is not detected when the STA is scheduled, directly sending the transmission medium occupied time data scheduling frame with the preset time length to the scheduled STA.
3. The method of claim 1, further comprising:
and adjusting the preset duration according to the priority of the scheduled STA.
4. The method of claim 1, wherein the scheduling each STA in turn according to the order of the STA list comprises:
based on a complete fairness algorithm, acquiring a target STA from the top of the STA list for scheduling;
after the target STA scheduling is completed, the target STA is removed from the top of the STA list and is inserted into the bottom of the STA list.
5. A method of wireless data transmission, comprising:
detecting channel control information when an Access Point (AP) schedules an STA, and acquiring a destination address of the channel control information after confirming that the AP has sent a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA;
and if the destination address of the channel control information is different from the local address, setting the local NAV to be the size of the preset time length, and keeping silence in the preset time length.
6. The method of claim 5, further comprising:
and if the destination address of the channel control information is the same as the local address, keeping the local NAV unchanged, and sending uplink data to the AP within the preset time length.
7. An access point, comprising:
the system comprises an acquisition module, a scheduling module and a processing module, wherein the acquisition module is used for acquiring a current accessed client STA list and scheduling each STA in sequence according to the sequence of the STA list;
and the scheduling module is used for sending a Burst data stream to the scheduled STA for each time of STA scheduling, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, a Network Allocation Vector (NAV) of the non-scheduled STA is set to be the size of the preset time length, and the silence is kept in the preset time length.
8. A client, comprising:
the detection module is used for detecting channel control information when the AP schedules the STA, and acquiring a destination address of the channel control information after confirming that the AP sends a Burst data stream to the scheduled STA, wherein the tail end of the Burst data stream carries a transmission medium occupation time data scheduling frame with a preset time length, and the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA;
and the silence module is used for setting a local NAV to be the size of the preset time length and keeping silence in the preset time length if the destination address of the channel control information is different from the local address.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the wireless data transmission method according to any of claims 1 to 6 are implemented when the processor executes the program.
10. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the wireless data transmission method according to any one of claims 1 to 6.
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