CN111314966B

CN111314966B - Wireless data transmission method and device, storage medium, AP and STA

Info

Publication number: CN111314966B
Application number: CN202010104878.5A
Authority: CN
Inventors: 赵育仁; 徐彦超; 余庆华
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2022-11-29
Anticipated expiration: 2040-02-20
Also published as: WO2021164628A1; CN111314966A

Abstract

A wireless data transmission method and device, storage medium, AP and STA are provided, the method comprises: receiving the control right of the TXOP from the STA, wherein the control right of the TXOP is handed over when the available total bandwidth of the STA is determined to be less than the reference total bandwidth after the TXOP is obtained by the STA through the TXOP competition; and determining a sender, wherein the sender adopts the TXOP to transmit data. The scheme of the invention can determine a more appropriate sender by the judgment of the AP, thereby effectively improving the data transmission efficiency of the system.

Description

Wireless data transmission method and device, storage medium, AP (access point) and STA (station)

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a wireless data transmission method and apparatus, a storage medium, an AP, and an STA.

Background

In the conventional Institute of Electrical and Electronics Engineers (ieee) 802.11 (Institute of Electrical and Electronics Engineers 802.11, ieee 802.11), a system with only a single link is defined, for example, a Wireless Local Area Network (WLAN) protocol. As technology evolves, a new type of multilink system is being discussed in 802.11 be.

In the wireless data Transmission technology, transmission Opportunity (TXOP) contention is an important content of wireless channel access, and is composed of an initial time and a maximum duration (TXOP limit). Specifically, the TXOP may be obtained through contention or allocation, and the station that obtains the TXOP may continuously use the channel to transmit multiple data frames within the TXOP limit time without re-contending the channel.

However, in the prior art, a Station (STA) that can only obtain control right determines whether to perform data transmission, and can only release TXOP without performing data transmission, which results in low data transmission efficiency of the system.

In a single link system, because the bandwidths used by the sending end and the receiving end are different, there are various bandwidth combinations, and therefore, in order to meet the requirement of the smaller bandwidth party, the smaller bandwidth is often adopted to transmit data, which results in lower transmission efficiency. For example, primary20, primary40, primary80, or other bandwidths may be employed, respectively. When the status of the Primary20 MHz channel (e.g., channel 1) is idle and the status of the other non-Primary channels is busy, only "Primary20" can be used, and the available bandwidth is 20MHz. When the status of the Primary40 MHz channel (e.g., channels 1, 2) is idle and the status of the remaining non-Primary channels is busy, "Primary40" can only be used, with the available bandwidth being 40MHz. When the status of the Primary80 MHz channels (e.g., channels 1, 2, 3, and 4) is idle and the status of the remaining non-Primary channels is busy, only "Primary80" can be used, and the available bandwidth is 80MHz.

This problem is more serious in the case of a synchronous multilink system, and a problem of low transmission efficiency is more likely to occur. In particular, in a synchronous multilink system, since there may be one or more secondary links, and the primary/secondary links may each use a variety of bandwidths, the determined channel bandwidth may be further reduced due to a plurality of conditions.

Therefore, a single-link or multi-link device supporting a larger total bandwidth can only use a smaller total bandwidth for transmission under the condition that the secondary channel has interference; alternatively, when full bandwidth transmission is required, the interference may make it more difficult to achieve full bandwidth transmission than a device that supports only narrow bandwidth.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a wireless data transmission method and device, a storage medium, an AP (access point), and an STA (station), which can determine a more appropriate sender through the cooperation of the STA and the AP and the judgment of the AP, so that the data transmission efficiency of a system can be effectively improved.

In order to solve the above technical problem, an embodiment of the present invention provides a wireless data transmission method, which is applicable to an access point, and includes the following steps: receiving a control right of TXOP from an STA, wherein the control right of TXOP is handed over when the STA determines that the available total bandwidth of the STA is less than the reference total bandwidth after the STA obtains the TXOP through TXOP competition; and determining a sender, wherein the sender adopts the TXOP to carry out data transmission.

Optionally, the wireless data transmission method further includes: if the STA already has a saved record of the TXOP, recording the number of times of handover of the STA plus 1; and if the STA does not have the storage record of the TXOP, recording the handover times of the STA as 1.

Optionally, the determining the sender includes: inquiring one or more STAs with TXOP (transmission opportunity) for saving records in a sequential or parallel mode to determine whether each STA with TXOP for saving records needs to adopt the TXOP for data transmission, wherein the handover times of the STAs with TXOP for saving records are more than or equal to 1; receiving feedback information from the one or more logged STAs having TXOPs; determining the sender according to the feedback information; and if the sender is one of the STAs, handing over the control right of the TXOP to the sender, and subtracting 1 from the number of times of handing over of the STA receiving the control right.

Optionally, querying one or more STAs with TXOP that save records in a sequential or parallel manner includes: and sending a trigger frame to the one or more STAs with TXOP (save record), and triggering uplink OFDMA transmission so as to enable the one or more STAs with TXOP to adopt the uplink OFDMA transmission feedback information.

Optionally, determining the sender according to the feedback information includes: and if the feedback information indicates that two or more STAs which need to adopt the TXOP for data transmission exist, determining the sender as one of the STAs according to a preset priority.

Optionally, the wireless data transmission method further includes: and sending a trigger frame to the one or more STAs with the TXOP (record saving) to trigger uplink OFDMA transmission, so that the one or more STAs with the TXOP and the record saving adopt the uplink OFDMA transmission TXOP to carry out data transmission.

Optionally, determining the sender according to the feedback information includes: and if the feedback information indicates that no STA needing to adopt the TXOP for data transmission does not exist and the access point has data to be transmitted which can adopt the TXOP transmission, determining that the sender is the access point and adopting the TXOP for data transmission.

Optionally, determining the sender according to the feedback information includes: and if the feedback information indicates that no STA needing to adopt the TXOP for data transmission does not exist and the access point does not have data to be transmitted which can adopt the TXOP transmission, determining to release the TXOP.

Optionally, the determining the sender includes: and determining the sender as the access point, and performing data transmission by adopting the TXOP.

To solve the above technical problem, an embodiment of the present invention provides a wireless data transmission method, which is applicable to an STA, and includes the following steps: after obtaining the TXOP through the TXOP competition, determining that the available total bandwidth of the STA is smaller than the reference total bandwidth; and handing over the control right of the TXOP to an access point so that the access point determines a sender, and the sender adopts the TXOP to carry out data transmission.

Optionally, the wireless data transmission method further includes: receiving inquiry of the access point in a sequential or parallel mode, wherein the inquiry is used for determining whether each STA with TXOP (transmission opportunity) for saving records needs to adopt the TXOP for data transmission, and the handover times of the STA with TXOP for saving records are more than or equal to 1; sending feedback information to the access point so that the access point determines the sender according to the feedback information; and if the sender is the STA, receiving the control right of the TXOP, and subtracting 1 from the handover frequency of the STA.

Optionally, receiving the query by the access point in a sequential or parallel manner includes: receiving a trigger frame from the access point, the trigger frame for triggering an uplink OFDMA transmission; and transmitting feedback information by adopting the uplink OFDMA transmission method.

Optionally, the wireless data transmission method further includes: receiving a trigger frame from the access point, the trigger frame for triggering an uplink OFDMA transmission; and transmitting data by adopting the uplink OFDMA transmission TXOP.

To solve the foregoing technical problem, an embodiment of the present invention provides a wireless data transmission device, which is suitable for an access point, and includes: a control right receiving module, adapted to receive the control right of TXOP from STA, the control right of TXOP is forwarded when the STA determines that the available total bandwidth of STA itself is less than the reference total bandwidth after obtaining TXOP through TXOP competition; and the sender determining module is suitable for determining a sender, and the sender adopts the TXOP to transmit data.

To solve the above technical problem, an embodiment of the present invention provides a wireless data transmission device, adapted to an STA, including: a TXOP obtaining module, which is suitable for determining that the available total bandwidth of the STA is less than the reference total bandwidth after the TXOP is obtained through the TXOP competition; and the control right handover module is suitable for handing over the control right of the TXOP to an access point so as to ensure that the access point determines a sender, and the sender adopts the TXOP to carry out data transmission.

In order to solve the above technical problem, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and the computer instructions execute the steps of the above wireless data transmission method when running.

In order to solve the above technical problem, an embodiment of the present invention provides an AP, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the above wireless data transmission method when executing the computer instructions.

In order to solve the above technical problem, an embodiment of the present invention provides an STA, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the above wireless data transmission method when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, the sender can be determined by the AP by setting the forwarding of the TXOP control right when the available total bandwidth of the STA is smaller than the reference total bandwidth, and the AP is a creator of a wireless network and has the position of a central node of the network, so that the control right of the TXOP can be allocated to the sender with needs.

Furthermore, one or more STAs with TXOP (save record forward) times more than or equal to 1 are inquired in a sequential or parallel mode, and then the sender is determined according to the STA feedback information and the control right of the TXOP is forwarded to the sender, so that the STA which has data transmission needs and can meet the requirement of the total available bandwidth can be quickly determined, and the data transmission efficiency of the system is effectively improved.

Further, if the feedback information indicates that there is no STA that needs to use the TXOP for data transmission, and the AP itself has data to be transmitted that can use the TXOP for data transmission, the AP itself uses the TXOP for data transmission, thereby avoiding wasting the TXOP, and further effectively improving the data transmission efficiency of the system.

Further, if the feedback information indicates that there is no STA that needs to use the TXOP for data transmission and there is no data to be transmitted that can use the TXOP for transmission, the AP releases the TXOP by itself, so that the TXOP is released as soon as possible under the condition that it is determined that there is no appropriate sender, thereby avoiding affecting the use of the needed members of the system, that is, effectively improving the data transmission efficiency of the system.

Drawings

Fig. 1 is a flow chart of a method for wireless data transmission according to an embodiment of the present invention;

FIG. 2 is a flowchart of one embodiment of step S12 of FIG. 1;

FIG. 3 is a flowchart of one embodiment of step S23 of FIG. 2;

fig. 4 is a schematic structural diagram of a wireless data transmission device according to an embodiment of the present invention.

Detailed Description

As described above, in the single link system of the conventional wireless data transmission technology, in an interference environment, the available bandwidth of the transmitting end or the receiving end is often limited due to the existence of interference, and the available bandwidth between the transmitting end and the receiving end may also be different, so that there are various bandwidth combinations, and the transmission efficiency is low because the data is often transmitted with a smaller bandwidth in order to meet the requirement of the smaller bandwidth. For example, primary20, primary40, primary80, or other bandwidths may be employed, respectively. When the status of the Primary20 MHz channel (e.g., channel 1) is idle and the status of the other non-Primary channels is busy, only "Primary20" can be used, and the available bandwidth is 20MHz. When the status of the Primary40 MHz channel (e.g., channels 1, 2) is idle and the status of the remaining non-Primary channels is busy, "Primary40" can only be used, with the available bandwidth being 40MHz. When the status of the Primary80 MHz channels (e.g., channels 1, 2, 3, and 4) is idle and the status of the remaining non-Primary channels is busy, "Primary80" can only be used, with the available bandwidth being 80MHz.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a method and apparatus for enabling a STA to perform data transmission according to a currently available bandwidth when the STA obtains control right.

In the embodiment of the invention, the control right of TXOP is received from STA, and the control right of TXOP is forwarded when the STA determines that the available total bandwidth of the STA is less than the reference total bandwidth after obtaining the TXOP through TXOP competition; and determining a sender, wherein the sender adopts the TXOP to transmit data. By adopting the scheme, the control right of the TXOP is handed over when the available total bandwidth of the STA is smaller than the reference total bandwidth, the AP can determine the sender, and the AP is a creator of a wireless network and has the position of a central node of the network, so that the control right of the TXOP can be allocated to the sender with needs.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below.

Referring to fig. 1, fig. 1 is a flowchart of a wireless data transmission method according to an embodiment of the present invention. The wireless data transmission method may include steps S11 to S12:

step S11: receiving a control right of TXOP from an STA, wherein the control right of TXOP is handed over when the STA determines that the available total bandwidth of the STA is less than the reference total bandwidth after the STA obtains the TXOP through TXOP competition;

step S12: and determining a sender, wherein the sender adopts the TXOP to transmit data.

In step S11, the STA may obtain control right of the TXOP via TXOP contention, and the step may be implemented in a conventional manner.

Specifically, the step of obtaining the control right of the TXOP by the STA via the TXOP contention may include: randomly determining a reciprocal initial value from an initial backoff window (back off window); every countdown time interval (back off interval), when the state of the main 20MHz channel is idle, the original countdown initial value is reduced by one to obtain an updated countdown value; and when the updated reciprocal value is zero, determining that the STA can obtain the control right of the TXOP.

Then, when the STA determines that its available total bandwidth is smaller than the reference total bandwidth, the STA transfers the control right of TXOP to an Access Point (AP).

Specifically, the available total bandwidth is compared with a reference total bandwidth.

Wherein the Available Total Bandwidth (ATBW) is used to indicate an Available Total Bandwidth that can be used when the STA determines to transmit data using the TXOP. Specifically, if the wireless data transmission method is used for single-link data transmission, the available total bandwidth may be regarded as an available bandwidth of one link, for example, an available bandwidth of the single link; if the wireless data transmission method is used for multi-link data transmission, the available total bandwidth can be regarded as the sum of the available bandwidths of the plurality of links.

The Reference Total Bandwidth (RTBW) is used to indicate a value for comparison, so that the STA determines whether to use the TXOP to send data or to transfer control of the TXOP to the access point based on at least a comparison result of the available Total Bandwidth and the Reference Total Bandwidth. Specifically, the reference total bandwidth may be a preset static value, or may be a dynamic value determined according to historical data.

It is noted that the reference total bandwidth may be determined in different ways. In a specific embodiment, the reference total bandwidth may be regarded as a sum of reference bandwidths of one or more links; in another specific embodiment, the reference total bandwidth may be further regarded as an average value of the available total bandwidth within a preset historical time period.

In another embodiment of the present invention, the reference bandwidth of each link is not defined and the reference total bandwidth is directly set or obtained.

In the specific implementation of step S12, a suitable sender is determined, which may be another STA or the AP itself, and the sender may use the TXOP to perform data transmission.

Further, the wireless data transmission method may further include: and if the initial value of the number of times of handover of the STA is 0 and the control right of the TXOP is handed over by the STA to the access point, recording the number of times of handover of the STA plus 1.

In the embodiment of the present invention, it may be determined that the STA has already had a save record of the TXOP according to whether the parameter of the number of handovers is greater than or equal to 1. Furthermore, by setting the number of times of handover plus 1, after the control right of the TXOP is received by adopting the scheme of the present invention each time, the STA can be quickly determined to have the stored records of several TXOPs by reading the parameter of the number of times of handover.

Further, the appropriate sender is determined, and if the determined sender is another STA, the number of times of handover of the other STA is reduced by 1. In the embodiment of the present invention, it may be preferentially determined whether the STA whose number of times of handover is greater than or equal to 1 is an appropriate sender according to whether the parameter of the number of times of handover is greater than or equal to 1.

Referring to fig. 2, fig. 2 is a flowchart of an embodiment of step S12 in fig. 1. The step of determining the sender may include steps S21 to S24, and each step is described below.

In step S21, one or more STAs with TXOP and storing records are queried in sequence or in parallel to determine whether each STA with TXOP and storing records needs to use the TXOP for data transmission, where the number of handovers of the STA with TXOP and storing records is ≧ 1.

In other words, the STAs having the TXOP and storing the records are STAs whose number of times of handover is 1 or more.

It can be understood that, the querying of the plurality of STAs in a sequential manner may be sequentially querying each STA according to a preset priority, so as to have an opportunity to reduce the number of queries; by inquiring a plurality of STAs in a parallel mode, each STA can be inquired simultaneously, so that the inquiring efficiency is improved.

In step S22, feedback information is received from the one or more STAs with TXOP which save records.

Wherein, the STA with TXOP for saving record is the STA with the handover times more than or equal to 1.

In the specific implementation, by inquiring the STAs with TXOP and whose number of recorded handover times is greater than or equal to 1 and receiving feedback information, it can be determined whether each STA with TXOP and whose number of recorded handover times is greater than or equal to 1 needs to use the TXOP for data transmission, and further set the control right handover step of TXOP when it is determined that there is an STA that needs to use the TXOP for data transmission.

Further, querying one or more STAs with TXOP that save recording in a sequential or parallel manner includes: and sending a trigger frame to the one or more STAs with TXOP (save record), and triggering uplink OFDMA transmission so as to enable the one or more STAs with TXOP to adopt the uplink OFDMA transmission feedback information.

In the embodiment of the present invention, a trigger frame is sent to the one or more STAs with TXOP and used for saving records, so that the one or more STAs with TXOP and used for saving records transmit feedback information by using the uplink OFDMA, thereby effectively improving the efficiency of transmitting feedback information.

In step S23, the sender is determined according to the feedback information.

Referring to fig. 3, fig. 3 is a flowchart of an embodiment of step S23 in fig. 2. The step of determining the sender according to the feedback information may include step S31, or may include step S32, or may include step S33, and each step is explained below.

In step S31, if the feedback information indicates that there are two or more STAs which need to use the TXOP for data transmission, the sender is determined to be one of the STAs according to a preset priority.

In the embodiment of the invention, one or more STAs with TXOP (transmission opportunity) and saved record forwarding times more than or equal to 1 are inquired in a sequential or parallel mode, and then the sender is determined according to the feedback information of the STAs and the control right of the TXOP is forwarded to the sender, so that the STAs which have data transmission needs and can meet the requirements of the currently available total bandwidth can be quickly determined, and the data transmission efficiency of the system is effectively improved.

In step S32, if the feedback information indicates that there is no STA that needs to perform data transmission using the TXOP and the access point itself has data to be transmitted that can be transmitted using the TXOP, it is determined that the sender is the access point itself and performs data transmission using the TXOP.

In the embodiment of the present invention, if the feedback information indicates that there is no STA that needs to use the TXOP for data transmission, and the AP itself has data to be transmitted that can use the TXOP for data transmission, the AP itself uses the TXOP for data transmission, so as to avoid wasting the TXOP, and further effectively improve the data transmission efficiency of the system.

Further, the wireless data transmission method may further include: and sending a trigger frame to the one or more STAs with the TXOP and storing records, and triggering an uplink Orthogonal Frequency Division Multiple Access (OFDMA) transmission, so that the one or more STAs with the TXOP and storing records perform data transmission by using the uplink OFDMA transmission TXOP.

Wherein the one or more STAs with TXOP and storing records are STAs with handover times greater than or equal to 1.

Specifically, the step of directing the STA to perform data transmission may be performed by setting the AP to send the trigger frame and perform uplink transmission OFDMA, and the scheme of the embodiment of the present invention may be implemented according to the existing trigger frame and the existing uplink transmission OFDMA, which is beneficial to improving the applicability and improving the efficiency of data transmission.

In step S33, if the feedback information indicates that there is no STA that needs to perform data transmission using the TXOP and the access point itself has no data to be transmitted that can be transmitted using the TXOP, it is determined to release the TXOP.

In the embodiment of the present invention, if the feedback information indicates that there is no STA that needs to use the TXOP for data transmission and there is no data to be transmitted that can be transmitted using the TXOP, the AP releases the TXOP by itself, so that the TXOP is released as soon as possible under the condition that it is determined that there is no appropriate sender, thereby avoiding affecting the use of the needed members of the system, that is, effectively improving the data transmission efficiency of the system.

It should be noted that, the wireless data transmission method may further include: and sending a trigger frame to the one or more STAs with TXOP (save record), and carrying out uplink transmission of OFDMA (orthogonal frequency division multiple access) so as to enable the one or more STAs with TXOP (save record) to adopt the TXOP for data transmission. The STA or STAs with TXOP and storing record may be an STA that feeds back data transmission without using the TXOP, but the AP guides the STA to use the TXOP according to its own judgment, which is helpful to improve applicability and improve efficiency of data transmission.

In step S24, if the sender is one of the STAs, the control right of the TXOP is handed over to the sender.

Specifically, in step S23, if it is determined that the sender is one of the STAs, the control right of the TXOP is handed over to the STA; if the sender is determined to be the sender, the method may be performed in step S32 or step S33, which is not limited herein.

With reference to fig. 1 again, in another specific implementation manner of step S12, the AP may also directly determine that the sender is the access point itself, and perform data transmission by using the TXOP.

Specifically, once the AP receives the control right of the TXOP from the STA, the AP directly determines that the sender is itself, and uses the TXOP to perform data transmission, and compared with the prior art in which only the STA that obtains the control right determines whether to perform data transmission, and the AP has no opportunity to perform judgment and transmission at all.

In the embodiment of the invention, the sender can be determined by the AP by setting the forwarding of the TXOP control right when the self available total bandwidth of the STA is less than the reference total bandwidth, and the AP is a creator of a wireless network and has the position of a central node of the network, so that the control right of the TXOP can be allocated to the sender with need.

It should be noted that, the embodiment of the present invention also discloses a wireless data transmission method, which is applicable to an STA, and includes the following steps: after obtaining the TXOP through the TXOP competition, determining that the available total bandwidth of the STA is smaller than the reference total bandwidth; and handing over the control right of the TXOP to an access point so as to enable the access point to determine a sender, wherein the sender adopts the TXOP to carry out data transmission.

Further, the wireless data transmission method further includes: receiving inquiry of the access point in a sequential or parallel mode, wherein the inquiry is used for determining whether each STA with TXOP (time-of-flight) for saving records needs to adopt the TXOP for data transmission, and the handover times of the STA with TXOP for saving records are more than or equal to 1; sending feedback information to the access point so that the access point determines the sender according to the feedback information; and if the sender is the STA, receiving the control right of the TXOP, and subtracting 1 from the handover frequency of the STA.

Further, receiving the query by the access point in a sequential or parallel manner comprises: receiving a trigger frame from the access point, the trigger frame for triggering an uplink OFDMA transmission; and transmitting feedback information by adopting the uplink OFDMA transmission method.

Further, the wireless data transmission method further includes: receiving a trigger frame from the access point, the trigger frame for triggering an uplink OFDMA transmission; and transmitting data by adopting the uplink OFDMA transmission TXOP.

For more details, please refer to the related description related to the wireless data transmission method shown in fig. 1 to fig. 3, which is not repeated herein.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a wireless data transmission device according to an embodiment of the present invention. The wireless data transmission apparatus may include:

a control right receiving module 41, adapted to receive the control right of TXOP from STA, where the control right of TXOP is handed over when STA determines that its own available total bandwidth is smaller than the reference total bandwidth after obtaining TXOP through TXOP contention;

and a sender determining module 42, adapted to determine a sender, which uses the TXOP to perform data transmission.

For the principle, specific implementation and beneficial effects of the wireless data transmission apparatus, please refer to the foregoing description and the related description about the wireless data transmission method shown in fig. 1 to fig. 4, which are not repeated herein.

In the embodiment of the present invention, a wireless data transmission device is further disclosed, which is suitable for an STA, and includes: a TXOP obtaining module, which is suitable for determining that the available total bandwidth of the access point is less than the reference total bandwidth after obtaining the TXOP through the TXOP competition; and the control right handover module is suitable for handing over the control right of the TXOP to an access point so as to ensure that the access point determines a sender, and the sender adopts the TXOP to carry out data transmission.

It should be noted that the technical solution of the present invention can be applied to a 5G (5 Generation) communication system, can also be applied to a 4G, 3G communication system, and can also be applied to various future new communication systems, such as 6G, 7G, etc.

The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the steps of the wireless data transmission method are executed when the computer instructions are executed. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.

Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM), SDRAM (SDRAM), synchlink DRAM (SLDRAM), and DRRAM (direct RAM).

The embodiment of the present invention further provides an AP, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the wireless data transmission method when executing the computer instructions.

The embodiment of the present invention further provides an STA, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the wireless data transmission method when executing the computer instructions.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for wireless data transmission, adapted for use in an access point, comprising the steps of: receiving a control right of TXOP from an STA, wherein the control right of TXOP is handed over when the STA determines that the available total bandwidth of the STA is less than the reference total bandwidth after the STA obtains the TXOP through TXOP competition; determining a sender, wherein the sender adopts the TXOP to perform data transmission;

wherein the determining the sender comprises:

inquiring one or more STAs with TXOP (transmission opportunity) for saving records in a sequential or parallel mode to determine whether each STA with TXOP for saving records needs to adopt the TXOP for data transmission, wherein the handover times of the STAs with TXOP for saving records are more than or equal to 1;

receiving feedback information from the one or more logged STAs having TXOPs;

determining the sender according to the feedback information;

and if the sender is one of the STAs, handing over the control right of the TXOP to the sender, and subtracting 1 from the number of times of handing over of the STA receiving the control right.

2. The method for wireless data transmission according to claim 1, further comprising:

if the STA already has a saved record of the TXOP, recording the number of times of the handover of the STA plus 1; and if the STA does not have the storage record of the TXOP, recording the handover times of the STA as 1.

3. The method of claim 1, wherein querying one or more STAs with saved records of TXOPs in a sequential or parallel manner comprises:

and sending a trigger frame to the one or more STAs with TXOP (save record), and triggering uplink OFDMA transmission so as to enable the one or more STAs with TXOP to adopt the uplink OFDMA transmission feedback information.

4. The method of claim 1, wherein determining the sender according to the feedback information comprises:

and if the feedback information indicates that two or more STAs which need to adopt the TXOP for data transmission exist, determining the sender as one of the STAs according to a preset priority.

5. The method of claim 4, further comprising:

and sending a trigger frame to the one or more STAs with the TXOP (record saving) to trigger uplink OFDMA transmission, so that the one or more STAs with the TXOP and the record saving adopt the uplink OFDMA transmission TXOP to carry out data transmission.

6. The method of claim 1, wherein determining the sender according to the feedback information comprises:

and if the feedback information indicates that no STA needing to adopt the TXOP for data transmission does not exist and the access point has data to be transmitted which can adopt the TXOP transmission, determining that the sender is the access point and adopting the TXOP for data transmission.

7. The method of claim 1, wherein determining the sender according to the feedback information comprises:

and if the feedback information indicates that no STA needing to adopt the TXOP for data transmission does not exist and the access point does not have data to be transmitted which can adopt the TXOP transmission, determining to release the TXOP.

8. The method of claim 1, wherein the determining the sender comprises:

and determining the sender as the access point and adopting the TXOP to carry out data transmission.

9. A wireless data transmission method suitable for an STA is characterized by comprising the following steps:

after obtaining the TXOP through the TXOP competition, determining that the available total bandwidth of the STA is smaller than the reference total bandwidth;

handing over the control right of the TXOP to an access point so that the access point determines a sender, and the sender adopts the TXOP to carry out data transmission;

wherein, the wireless data transmission method further comprises:

receiving inquiry of the access point in a sequential or parallel mode, wherein the inquiry is used for determining whether each STA with TXOP (transmission opportunity) for saving records needs to adopt the TXOP for data transmission, and the handover times of the STA with TXOP for saving records are more than or equal to 1;

sending feedback information to the access point so that the access point determines the sender according to the feedback information;

and if the sender is the STA, receiving the control right of the TXOP, and subtracting 1 from the handover frequency of the STA.

10. The method of claim 9, wherein receiving the query by the access point in a sequential or parallel manner comprises:

receiving a trigger frame from the access point, the trigger frame for triggering an uplink OFDMA transmission;

and transmitting feedback information by using the uplink OFDMA transmission method.

11. The method of claim 9, further comprising:

and transmitting data by adopting the uplink OFDMA transmission TXOP.

12. A wireless data transmission apparatus adapted for use with an access point, comprising:

a control right receiving module, adapted to receive the control right of TXOP from STA, the control right of TXOP is forwarded when the STA determines that the available total bandwidth of STA itself is less than the reference total bandwidth after obtaining TXOP through TXOP competition;

a sender determining module, adapted to determine a sender, where the sender uses the TXOP to perform data transmission;

wherein the sender determining module comprises:

the inquiry submodule is used for inquiring one or more STAs with TXOP (save record) in a sequential or parallel mode so as to determine whether each STA with TXOP and with TXOP needs to adopt the TXOP for data transmission, wherein the handover times of the STAs with TXOP and with record are more than or equal to 1;

a first receiving submodule, configured to receive feedback information from the one or more STAs with TXOP that save records;

the determining submodule is used for determining the sender according to the feedback information;

and the handover sub-module is used for handing over the control right of the TXOP to the sender when the sender is one of the STAs, and subtracting 1 from the handover times of the STA receiving the control right.

13. A wireless data transmission device, adapted for a STA, comprising:

a TXOP obtaining module, which is suitable for determining that the available total bandwidth of the STA is less than the reference total bandwidth after the TXOP competition is obtained;

a control right forwarding module adapted to forward the control right of the TXOP to an access point, so that the access point determines a sender, and the sender uses the TXOP to perform data transmission;

wherein the wireless data transmission device further comprises:

a second receiving submodule, configured to receive an inquiry performed by the access point in a sequential or parallel manner, where the inquiry is used to determine whether each STA having a TXOP and storing a record needs to perform data transmission using the TXOP, and a handover frequency of the STA having the TXOP and storing the record is greater than or equal to 1;

the sending submodule is used for sending feedback information to the access point so that the access point determines the sender according to the feedback information;

and the control right receiving submodule is used for receiving the control right of the TXOP when the sender is the STA per se, and the handover frequency of the STA is reduced by 1.

14. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the wireless data transmission method of any one of claims 1 to 8 or perform the steps of the wireless data transmission method of any one of claims 9 to 11.

15. An AP comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the method for wireless data transmission according to any one of claims 1 to 8.

16. A STA comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the wireless data transmission method of any one of claims 9 to 11.