CN107409431A

CN107409431A - A kind of data transfer control method and access point, website

Info

Publication number: CN107409431A
Application number: CN201580078265.6A
Authority: CN
Inventors: 马驰翔; 林英沛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-08-21
Filing date: 2015-08-21
Publication date: 2017-11-28
Anticipated expiration: 2035-08-21
Also published as: CN107409431B; WO2017031628A1

Abstract

Data transmission method disclosed in the present application,Access point is after the acknowledgement channel free time,Send the first control frame of control,First control frame includes the first Duration fields and carries the mark of Basic Service Set,Website is after the first control frame is received,If this website is in the Basic Service Set,This website replys the second control frame to access point,The mark of this base server is carried in second control frame,After access point receives the second control frame,Carry out data transmission with website,If website is not in this Basic Service Set and the data transfer in the Basic Service Set is interfered,Value of the website according to the first Duration fields,Update NAV,So,Interference can be evaded,Again because access point allows the website in this Basic Service Set to participate in communication,And generally there are multiple websites in a Basic Service Set,So,Within a period of time,Not only only have a website to carry out data transmission,So as to improve bandwidth availability ratio.

Description

A kind of data transfer control method and access point, website

Technical field

This application involves the communications field more particularly to a kind of data transfer control methods and access point, website.

Background technique

In IEEE 802.11g WLAN (Wireless Local Area Network, WLAN system in), frame is not closed on the interference of website by transmitting terminal and receiving end in order to protect data, as shown in Figure 1, transmitting terminal is before sending data frame, transmitting terminal sends request and sends (Request to Send, control) frame, receiving end is upon receiving the rts, reply allows to send (Clear to Send, control response) frame, duration Duration field is carried in RTS and CTS, for protection duration needed for informing the data transmission procedure between receiving end and transmitting terminal, the protection duration is not less than the occupied duration of data transmission procedure between receiving end and transmitting terminal, Value of other websites according to Duration field in addition to transmitting terminal and receiving end, respective network allocation vector (Network Allocation Vector is set, NAV), NAV keeps silent for website during transmitting terminal and receiving end carry out data transmission.

As it can be seen that above-mentioned interference Hedging mechanism only allows a STA to access AP and transmits data, therefore, evade interference by cost of bandwidth availability ratio in same amount of time.So how evade interference under the premise of improve bandwidth availability ratio, become current urgent problem to be solved.

Summary of the invention

This application provides a kind of data transfer control method and access points, website, it is therefore intended that solves the problems, such as how bandwidth availability ratio is improved under the premise of evading interference.

To achieve the goals above, this application provides following technical schemes:

The first aspect of the application provides a kind of data transfer control method, comprising:

Access point sends the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

If the mark for the basic service set that the second control frame of website feedback carries is identical as the mark of the basic service set that first control frame carries, carry out data transmission between described access point and the website.

The second aspect of the application provides another data transfer control method, comprising:

Website receives the first control frame that access point is sent, and first control frame includes the first Duration field and the mark for carrying basic service set；

If the website is in the basic service set, the website replys the second control frame to described access point, and second control frame carries the mark of the basic service set；

If the website is not in the basic service set and interferes to the data transmission in the basic service set, the website updates NAV depending at least on the value of the first Duration field.

The third aspect of the application provides another data transfer control method, comprising:

Website receives the first control frame that access point is sent, and first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set；

If the website is in the basic service set and the mark of the website carries in first control frame, the website replys the second control frame to described access point, and second control frame carries the mark of the basic service set；

If the website is in the basic service set but the mark of the website does not carry in first control frame, the website updates NAV depending at least on the value of the first Duration field.

The fourth aspect of the application provides a kind of access point, comprising:

First sending module; for after acknowledgement channel is idle; send the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

Data transmission module carries out data transmission between the website if the mark for the basic service set that the second control frame for website feedback carries is identical as the mark of the basic service set that first control frame carries.

The 5th aspect of the application provides a kind of website, comprising:

First receiving module, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and the mark for carrying basic service set；

First processing module replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.

The 6th aspect of the application provides another website, comprising:

Second receiving module, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set；

Second processing module replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website and the mark of the website carries in first control frame；If the website is in the basic service set but the mark of the website does not carry in first control frame, depending at least on the value of the first Duration field, NAV is updated.

Data transmission method disclosed in the present application, access point is after acknowledgement channel is idle, send the first control frame of control, it include the first Duration field and the mark for carrying basic service set in frame format of first control frame based on media access control MAC layer protocol, website is after receiving the first control frame, if this website is in the basic service set, this website replys the second control frame to access point, the mark of this base server is carried in second control frame, after access point receives the second control frame, carry out data transmission with website, if website is not in this basic service set and interferes to the data transmission in the basic service set, value of the website according to the first Duration field, update NAV；

Or, it include the first Duration field and the mark for carrying the mark of basic service set and the website in basic service set in frame format of first control frame based on media access control MAC layer protocol, website is after receiving the first control frame, if this website is in the basic service set and the mark of website carries in the first control frame, this website replys the second control frame to access point, the mark of this base server is carried in second control frame, if website is in the basic service set but its mark does not carry in first control frame, or it is not in basic service set and to basic service set Interior data transmission interferes, then website updates NAV depending at least on the value of the first Duration field.

Because NAV can make website keep silent in the data transmission procedure of access point and other websites in the basic service set, so, interference can be evaded, again because access point allows the website in this basic service set to participate in communication, and usually have multiple websites in a basic service set, so, whithin a period of time, not only only one website can carry out data transmission, so as to improve bandwidth availability ratio.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the description of the embodiments or prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is that the data of sending node and receiving node transmit schematic diagram in wlan system；

Fig. 2 is the communication scenes schematic diagram of WLAN；

Fig. 3 is a kind of flow chart of data transfer control method disclosed by the embodiments of the present invention；

Fig. 4 is the flow chart of another data transfer control method disclosed by the embodiments of the present invention；

Fig. 5 is the schematic diagram of frame structure of the first control frame of the first kind based on mac-layer protocol disclosed by the embodiments of the present invention；

Fig. 6 is the schematic diagram of the frame structure of the first control frame of the first kind disclosed by the embodiments of the present invention and the first control frame of Second Type based on physical layer protocol；

Fig. 7 is a kind of schematic diagram of frame structure of the second control frame disclosed by the embodiments of the present invention based on mac-layer protocol；

Fig. 8 is a kind of schematic diagram of frame structure of the second control frame shown in Fig. 7 based on physical layer protocol；

Fig. 9 is the flow chart of another data transfer control method disclosed in the embodiment of the present application；

Figure 10 is the schematic diagram of frame structure of the first control frame of Second Type based on mac-layer protocol disclosed in the embodiment of the present application；

The flow chart of another data transfer control method disclosed in Figure 11 the embodiment of the present application；

The schematic diagram of multiple transmissions disclosed in Figure 12 the embodiment of the present application；

Figure 13 is the schematic diagram of another frame structure of second control frame based on physical layer protocol shown in Fig. 7；

Figure 14 is the flow chart of another data transfer control method disclosed in the embodiment of the present application；

Figure 15 is the schematic diagram of another frame structure of second control frame based on mac-layer protocol disclosed in the embodiment of the present application；

Figure 16 is a kind of structural schematic diagram of access point disclosed in the embodiment of the present application；

Figure 17 is a kind of structural schematic diagram of website disclosed in the embodiment of the present application；

Figure 18 is the structural schematic diagram of another website disclosed in the embodiment of the present application.

Specific embodiment

The embodiment of the present application discloses a kind of data transfer control method and access point, website, access point described in the embodiment of the present application and website are compared with the prior art, it has been provided with new function, and access point described in the embodiment of the present application and website can be applied in existing wlan system, i.e., use with the hardware compatibility in existing wlan system.As shown in Figure 2, it include access point and multiple websites in the wlan system, in order to be distinguished with existing wlan device, in Fig. 2, (high-performance WLAN, High Efficiency WLAN) HEW-AP is access point disclosed in the embodiment of the present application, and HEW-STA is website disclosed in the embodiment of the present application, and Legacy (tradition)-STA is traditional website, website can be converted between HEW and Legacy mode.

Below in conjunction with the attached drawing in the embodiment of the present application, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall in the protection scope of this application.

Embodiment one

A kind of data transfer control method disclosed in the embodiment of the present application, description AP compete successfully and indicate the process that STA carries out data transmission, comprising the following steps:

Step 1: HEW-AP listens to channel；

HEW-AP listens to channel, and attempts to send the first control frame of Second Type (and being properly termed as MU-RTS) when the channel is idle.Each MU-RTS occupies the bandwidth of 20MHz.

Step 2: HEW-AP is successfully transmitted the first control frame of Second Type (and being properly termed as MU-RTS)；

Channel has been arrived in HEW-AP competition, is successfully transmitted MU-RTS.MU-RTS and traditional RTS frame in some differences of format and content, physical layer frame format as shown in fig. 6, the frame format in MAC is as shown in Figure 10, the assignment and meaning of various pieces are as described below:

Frame Control:, e.g. 0101 (value can be defined as other not used value) different on subtype value from traditional RTS；Or, e.g. 01 (in existing standard be used only 00, therefore can be written as other values in addition to 00 other than) different on protocol version from traditional RTS；And bit 8 is newly defined as BSS color to bit 15, to indicate the information of BSS.

Duration :+3 times of SIFS+CTS duration+data-triggered frame durations of duration of subsequent data transmission are set as；The traditional STA and HEW-STA being scheduled not in MU-RTS will update NAV according to this value, and the HEW-STA dispatched in MU-RTS then passes through the size that this value judges data transmission；

TA: being newly defined as 4 and receive the partial association mark (PAID) that uplinks send STA, and wherein PAID is 12 bits, and sequential (sequentially number be 1,2,3,4), 4 PAID totally 48 bit.

RA: being newly defined as 4 and receive the partial association mark (PAID) that uplinks send STA, and wherein PAID is 12 bits, and sequential (sequentially number be 5,6,7,8), 4 PAID totally 48 bit.

FCS: it is arranged with traditional RTS according to the same method.

The function of above-mentioned each field are as follows:

Frame Control:protocol version is used to that protocol version is arranged.Type value is used to be arranged the general type of frame.Subtype value is used to be arranged the concrete type of frame.BSS color is used to be arranged the identification information of BSS.

Duration: for required time span information to be protected is arranged.

TA: the MAC Address of sending node is set in the prior art, totally 48 bit.The partial association mark of 4 STA before being used to be arranged in this programme.

RA: the MAC Address of receiving node is set in the prior art, totally 48 bit.The partial association mark of 4 STA after being used to be arranged in this programme.

FCS: like the prior art, CRC check bit information, for verifying the frame correctness of MAC layer.

Step 3: HEW-STA indicates to send the second control frame according to PAID after receiving MU-RTS, or updates NAV；

HEW-STA receives the MU-RTS of HEW-AP transmission, determines whether it is this BSS according to the BSS color indicated in HEW-RTS, is determined the need for replying the second control frame according to the PAID wherein indicated.If it is determined that the second control frame is not replied, then updating NAV according to the duration in MU-RTS.

The format of second control frame can as shown in figure 13 (the second control frame shown in Figure 13 can also be known as MU-CTS), and allowing HEW-AP to know is the second control frame of which HEW-STA reply；HEW-AP can also not needed to allow as shown in Figure 8 (the second control frame shown in Fig. 8 can also be known as eCTS) come to distinguish be the second control frame which HEW-STA is replied.

All HEW-STA reply the second control frame of same format, i.e., perhaps all reply the second control frame as shown in fig. 13 that or all reply the second control frame as shown in Figure 8.

Frame structure of second control frame based on mac-layer protocol is as shown in Figure 7.

MU-CTS is made of the OFDM symbol newly increased with traditional CTS, and the OFDM symbol and traditional CTS newly increased is all the frame of independent PHY layer as shown in Figure 8.Its physical layer frame format as shown in figure 8, MAC frame format as shown in figure 9, the assignment and meaning of its various pieces are as described below:

Frame Control: it is different on subtype value from traditional CTS, it is 0100 (value can be defined as other not used values)；Or, e.g. 01 (in existing standard be used only 00, therefore can be written as other values in addition to 00 other than) different on protocol version from traditional RTS；And bit 8 is newly defined as BSS color to bit 15, to indicate the information of BSS.

Duration: the duration being set as in RTS subtracts SIFS and subtracts CTS duration again；The traditional STA and HEW-STA being scheduled not in MU-RTS will update NAV according to this value, and the HEW-STA dispatched in MU-RTS then passes through the size that this value judges data transmission；

RA: it is arranged to parameter that one is appointed in advance or numerical value or BSSID.

FCS: it is arranged with traditional CTS according to the same method.

TBD: it is arranged to the time span for being less than or equal to SIFS, for separating the OFDM symbol newly increased and traditional CTS.

The OFDM symbol newly increased: being segmented into N number of RU, and wherein N is more than or equal to 8, such as N can be equal to 9.It so distributes wherein 8 RU and corresponds to 8 PAID in MU-RTS in sequence, HEW-STA sends PAID STA ID in corresponding RU when replying MU-CTS, is MU-CTS which STA is replied so that HEW-AP knows.

Step 4: traditional STA receives any one in MU-RTS, MU-CTS/eCTS, according to Duration value therein, updates NAV；

In the present embodiment, STA updates the foundation of NAV are as follows:

1, STA first determines whether protocol version, type value and subtype value in frame control are values known to STA.If it is unknown value, then just reading duration field and updating NAV.

If 2, STA has found the value of above three field it is known that so reading RA, and judge whether the frame for being destined to oneself.If not oneself is sent to, then just reading duration field and updating NAV.

Step 5: HEW-AP receives MU-CTS, sends data-triggered frame, and adjust the resource allocation information in trigger frame；

HEW-AP receives eCTS, sends data-triggered frame.

Step 6: HEW-STA determines whether to send data according to the resource distribution instruction information in data-triggered frame after receiving data-triggered frame.

Embodiment two

Another data transfer control method disclosed in the embodiment of the present application, description AP compete the process that data are sent successfully and to STA, comprising the following steps:

Step 1: HEW-AP listens to channel；

HEW-AP listens to channel, and attempts to send MU-RTS when the channel is idle.Each MU-RTS occupies the bandwidth of 20MHz.

Step 2: HEW-AP is successfully transmitted MU-RTS；

Channel has been arrived in HEW-AP competition, is successfully transmitted MU-RTS.MU-RTS and traditional RTS in some differences of format and content, physical layer frame format as shown in fig. 6, MAC frame format As shown in Figure 10, the assignment of various pieces and meaning are as described below:

Duration: it is set as the duration of+2 times of SIFS+CTS durations of duration of subsequent data transmission；The traditional STA and HEW-STA being scheduled not in MU-RTS will update NAV according to this value, and the HEW-STA dispatched in MU-RTS then passes through the size that this value judges data transmission；

FCS: it is arranged with traditional RTS according to the same method.

Step 3: HEW-STA indicates to send MU-CTS/eCTS according to PAID after receiving MU-RTS, or updates NAV；

HEW-STA receives the MU-RTS of HEW-AP transmission, determines whether it is this BSS according to the BSS color indicated in HEW-RTS, is determined the need for replying MU-CTS/eCTS according to the PAID wherein indicated.If it is determined that MU-CTS/eCTS is not replied, then updating NAV according to the duration in MU-RTS.If it is determined that reply MU-CTS, replied according to following format, and allowing HEW-AP to know is the MU-CTS of which HEW-STA reply.

If it is determined that reply eCTS, replied according to the format of such as Fig. 7 and Fig. 8, does not need to allow HEW-AP to distinguish be eCTS which HEW-STA is replied.

All HEW-STA reply the CTS of same format, i.e., perhaps all reply MU-CTS or all reply eCTS.

MU-CTS is made of the OFDM symbol newly increased with traditional CTS, and the OFDM symbol and traditional CTS newly increased is all the frame of independent PHY layer as shown in figure 13.It is as shown in figure 13 in the frame format of physical layer, MAC frame format as shown in fig. 7, the assignment and meaning of its various pieces are as described below:

FCS: it is arranged with traditional CTS according to the same method.

The OFDM symbol newly increased: being segmented into N number of RU, and wherein N is more than or equal to 8, such as N can be equal to 9.It so distributing wherein 8 RU and corresponds to 8 PAID in MU-RTS in sequence, HEW-STA sends PAID STA ID in corresponding RU when replying MU-CTS, so as to It is MU-CTS which STA is replied that HEW-AP, which knows,.

Step 4: traditional STA receives any one in MU-RTS, MU-CTS, according to Duration value therein, updates NAV；

Step 5: HEW-AP receives MU-CTS, and determines to which STA and send data；

HEW-AP receives eCTS, is ready for sending data frame.

Embodiment three

A kind of data transfer control method disclosed in the embodiment of the present application, description AP competes multiple 20MHz channels and succeeds and indicate the process that STA carries out data transmission, in the present embodiment, HEW-AP and HEW-STA are performed both by method described in embodiment one on each 20MHz channel.

Example IV

A kind of data transfer control method disclosed in the embodiment of the present application, description AP competes multiple 20MHz channels and succeeds and indicate the process that STA carries out data transmission, in the present embodiment, HEW-AP and HEW-STA are performed both by method described in embodiment two on each 20MHz channel.

Embodiment five

A kind of data transfer control method disclosed in the embodiment of the present application, description STA are competed successfully and are given AP OFDMA scheduling controlling power, and the process of data is sent by AP scheduling STA, comprising the following steps:

Step 1: HEW-STA listens to channel, and sends the first control frame of the first kind (being referred to as eRTS)；

HEW-STA listens to channel, and attempts to send eRTS when the channel is idle (here it is also possible that with tradition RTS, but which BSS needs to be distinguished with the MAC Address of the AP in RA in tradition RTS is).Wherein eRTS uses the format defined such as Fig. 5 and Fig. 6, and each RTS occupies the band of 20MHz It is wide.

Wherein:

If subtype protocol version is different from traditional RTS, bit 8 can be fully utilized to bit 15 in BSS color.If subtype protocol version is identical as traditional RTS, needs to be indicated that this is eRTS, such as bit 13 with 1 bit, indicate BSS color with other remaining 7 bits.

Duration :+2 times of SIFS+MU-RTS durations of duration of the subsequent data transmission of estimation are set as；Traditional STA and others HEW-STA will update NAV according to this value, and corresponding HEW-AP then passes through the size that this value judges data transmission；

The MAC Address of TA:HEW-STA.

The MAC Address of RA:HEW-AP.

FCS: it is arranged with traditional RTS according to the same method.

Step 2: HEW-AP is successfully transmitted the first control frame of Second Type (being referred to as MU-RTS)；

Channel has been arrived in HEW-AP competition, is successfully transmitted MU-RTS.MU-RTS and traditional RTS in some differences of format and content, physical layer frame format as shown in fig. 6, the frame format in MAC layer is as shown in Figure 10, the assignment and meaning of various pieces are as described below:

Frame Control:, e.g. 0101 (value different on subtype value from traditional RTS It can be defined as other not used values)；Or, e.g. 01 (in existing standard be used only 00, therefore can be written as other values in addition to 00 other than) different on protocol version from traditional RTS；And bit 8 is newly defined as BSS color to bit 15, to indicate the information of BSS.

FCS: it is arranged with traditional RTS according to the same method.

If it is determined that reply the second control frame, second control frame is as shown in Figure 7 in the frame format of MAC layer, can as shown in figure 13 (the second control frame can also be known as MU-CTS as shown in fig. 13 that) in the frame structure of physical layer, allowing HEW-AP to know is the MU-CTS of which HEW-STA reply；Alternatively, Second control frame can also not need to allow HEW-AP as shown in Figure 8 (as shown in Figure 8 the second control frame can also be known as eCTS) in the frame structure of physical layer come to distinguish be eCTS which HEW-STA is replied.

FCS: it is arranged with traditional CTS according to the same method.

Embodiment six

A kind of data transfer control method disclosed in the embodiment of the present application, description STA are competed successfully and are given AP OFDMA scheduling controlling power, and the process of data is sent from AP to STA, specifically includes the following steps:

Step 1: HEW-STA listens to channel, and sends eRTS；

HEW-STA listens to channel, and attempts to send eRTS when the channel is idle (here it is also possible that with tradition RTS, but which BSS needs to be distinguished with the MAC Address of the AP in RA in tradition RTS is).Wherein eRTS uses the mode defined such as Fig. 5 and Fig. 6, and each RTS occupies the bandwidth of 20MHz.

Frame Control:, e.g. 0101 (value can be defined as other not used value) different on subtype value from traditional RTS；Or, e.g. 01 (in existing standard be used only 00, therefore can be written as other values in addition to 00 other than) different on protocol version from traditional RTS； And bit 8 is newly defined as BSS color to bit 15, to indicate the information of BSS.

The MAC Address of TA:HEW-STA.

The MAC Address of RA:HEW-AP.

FCS: it is arranged with traditional RTS according to the same method.

Step 2: HEW-AP sends MU-RTS；

HEW-AP receives eRTS, then sending MU-RTS.MU-RTS and traditional RTS in some differences of format and content, physical layer frame format as shown in fig. 6, the frame format in MAC is as shown in Figure 10, the assignment and meaning of various pieces are as described below:

FCS: it is arranged with traditional RTS according to the same method.

HEW-STA receives the MU-RTS of HEW-AP transmission, determines whether it is this BSS according to the BSS color indicated in HEW-RTS, is determined the need for replying MU-CTS/eCTS according to the PAID wherein indicated.If it is determined that MU-CTS/eCTS is not replied, then updating NAV according to the duration in MU-RTS.If it is determined that reply MU-CTS, replied according to Figure 13 and format shown in Fig. 7, allowing HEW-AP to know is the MU-CTS of which HEW-STA reply.

FCS: it is arranged with traditional CTS according to the same method.

Step 5: HEW-AP receives HEW-CTS, and determines to which STA and send data.

Embodiment seven

The present embodiment describes STA and competes multiple 20MHz channel successes and dispatch the process that instruction STA carries out data transmission by AP.HEW-AP and HEW-STA executes embodiment on each 20MHz channel Five method.

Embodiment eight

The present embodiment describes STA and competes multiple 20MHz channel successes and dispatch the process for sending data to STA by AP.The method that HEW-AP and HEW-STA executes embodiment six on each 20MHz channel.

Embodiment nine

Step 1: HEW-AP listens to channel；

HEW-AP listens to channel, and attempts to send eRTS when the channel is idle.Each eRTS occupies the bandwidth of 20MHz.

Step 2: HEW-AP is successfully transmitted eRTS；

Channel has been arrived in HEW-AP competition, is successfully transmitted eRTS.ERTS and traditional RTS in some differences of format and content, physical layer frame format as shown in fig. 6, MAC frame format as shown in figure 5, the assignment and meaning of its various pieces are as described below:

Duration :+3 times of SIFS+MU-RTS duration+trigger frame durations of duration of the subsequent data transmission of estimation are set as；Traditional STA and others HEW-STA will update NAV according to this value, and corresponding HEW-AP then passes through the size that this value judges data transmission；

The MAC Address of TA:HEW-AP.

FCS: it is arranged with traditional RTS according to the same method.

Step 3: HEW-STA replys eCTS after receiving eRTS, or updates NAV；

HEW-STA receives the eRTS of HEW-AP transmission, determines whether this BSS according to the BSS color indicated in eRTS to determine the need for replying eCTS.If it is determined that eCTS is not replied, then updating NAV according to the duration in eRTS.

If it is determined that reply eCTS, replied according to the format of such as Fig. 8 and Fig. 7, does not need to allow HEW-AP to distinguish be eCTS which HEW-STA is replied.

All HEW-STA reply the CTS of same format, i.e., all reply eCTS.

ECTS physical layer frame format as shown in figure 8, MAC frame format as shown in fig. 7, the assignment and meaning of its various pieces are as described below:

Frame Control: it is different on subtype value from traditional CTS, it is 0100 (value can be defined as other not used values)；Or, e.g. 01 (in existing standard be used only 00, therefore can be written as other values in addition to 00 other than) different on protocol version from traditional RTS； And bit 8 is newly defined as BSS color to bit 15, to indicate the information of BSS.

If subtype protocol version is different from traditional RTS, bit 8 can be fully utilized to bit 15 in BSS color.If subtype protocol version is identical as traditional RTS, needs to be indicated that this is eCTS, such as bit 13 with 1 bit, indicate BSS color with other remaining 7 bits.

Duration: the duration being set as in RTS subtracts SIFS and subtracts CTS duration again；Traditional STA and others HEW-STA will update NAV according to this value；

FCS: it is arranged with traditional CTS according to the same method.

Step 4: traditional STA receives any one in eRTS or eCTS, according to Duration value therein, updates NAV；

Step 5: HEW-AP receives eCTS, sends data-triggered frame.

Embodiment ten

A kind of data transfer control method disclosed in the embodiment of the present application, description AP compete the process that data are sent successfully and to STA, comprising the following steps:

Step 1: HEW-AP listens to channel；

Step 2: HEW-AP is successfully transmitted eRTS；

Step 3: HEW-STA indicates to send eCTS according to PAID after receiving eRTS, or updates NAV；

All HEW-STA reply the CTS of same format, i.e., all reply eCTS.

Step 5: HEW-AP receives eCTS, is ready for sending data frame.

In the present embodiment, the frame format of eRTS and eCTS be may refer to described in other embodiments, and which is not described herein again.

Embodiment 11

The process of multiple channels is realized in the way of similar embodiment seven.

Embodiment 12

The process of multiple channels is realized in the way of similar embodiment eight.

Embodiment 13

For the MAC layer format of the eCTS in above-mentioned all embodiments, there can be another implementation, as shown in figure 15.

It does not modify rear 8 bit of the part frame control herein, and BSS color information is placed on RA word Between section and FCS field.

Embodiment 14

In embodiment one, two, five and six, traditional STA receives any one in MU-RTS, MU-CTS/eCTS, according to Duration value therein, updates NAV.

The NAV for not including the HEW-STA of corresponding identity in MU-RTS updates any one regular that can choose in following rule:

1. updating NAV according to existing standard rule；

2. judged whether by BSS color be this BSS frame, then update NAV if it is this BSS, do not update NAV then if not this BSS；

3. judged whether by BSS color be this BSS frame, if not this BSS and meet preset condition and do not update NAV then, be not if it is this BSS or this BSS and be unsatisfactory for preset condition and then update NAV.

Wherein, preset condition can be less than CCA threshold value or the CCA threshold value of OBSS etc..

In embodiment nine and ten, traditional STA receives any one in eRTS, eCTS, according to Duration value therein, updates NAV.

The NAV of HEW-STA updates any one regular that can choose in following rule:

1. updating NAV according to existing standard rule；

3. judged whether by BSS color be this BSS frame, be not if it is this BSS or this BSS simultaneously And meet preset condition and do not update NAV then, if whether this BSS and updating NAV if being unsatisfactory for preset condition.

Embodiment 15

A kind of data transfer control method disclosed in the embodiment of the present application, as shown in Figure 3, comprising the following steps:

S301: access point sends the first control frame after acknowledgement channel is idle；

In the present embodiment, it include the first Duration field and the mark for carrying basic service set in frame format of first control frame based on media access control MAC layer protocol, specifically, the mark of basic service set can be Basic Service Set color, abbreviation BSS color, BSS color is used to inform that the website in this BSS to participate in data transmission.

The value of first Duration field is used to indicate to carry out data transmission required protection duration between the website in access point and this BSS, in general, this protection duration is not less than the time carried out data transmission between the website in access point and this BSS.

S302: after receiving above-mentioned first control frame, website judges whether in this BSS website, if so, S303 is executed, if not, executing S304；

S303: website replys the second control frame to access point；

In the present embodiment, for the second control frame based on above-mentioned BSS color is carried in the frame structure of mac-layer protocol, its object is to show that this website is the website that access point allows to participate in that data are transmitted to access point.

S304: if website is not in BSS and interferes to the data transmission in the basic service set, value of the website according to the first Duration field updates NAV.

Specifically, interfering to the data transmission in the basic service set can be with are as follows: the reception power of website is greater than clear channel assessment (CCA) (clear channel assessment, CCA) the CCA threshold value of threshold value or the basic service set of overlapping (overlapping Basic Service Set, OBSS).That is, although website is not in the BSS where the data transmission that will be carried out, because website meets above-mentioned condition, it is interfered so website can transmit data, in order to evade interference, so, even if website still will update the NAV of website not in above-mentioned BSS.

S305: if the second control frame of website feedback is carried out data transmission between access point and this website based on the BSS color is carried in the frame format of mac-layer protocol.

From above-mentioned steps it can be seen that, in the present embodiment, the first Duration field is carried in the first control frame, the STA for being not involved in data transmission updates NAV, in order to keep silent during other STA carry out data transmission, to avoid interfering the data frame in transmission.

Also, in the present embodiment, access point informs that the STA in a BSS participates in communication using frame structure as carrier, it include multiple STA in a usual BSS, so access point can carry out data transmission with multiple STA within the same period, to realize the purpose for improving bandwidth availability ratio.

Embodiment 16

Another data transfer control method disclosed in the embodiment of the present application, as shown in Figure 4, comprising the following steps:

S401:HEW-AP listens to channel；

After S402:HEW-AP listens to an idle channel, the first control frame of the first kind is sent in this idle channel (such as 20MHZ)；

In the present embodiment, frame format of the first control frame of the first kind based on mac-layer protocol is as shown in Figure 5, comprising:

Frame controls Frame Control field (occupying 16 bits), protocol version protocol version field (occupying 2 bits) is specifically included, for the version of agreement to be arranged；Type the type field (occupies 2 bits), for the general type of frame to be arranged；Subtype value field (occupies 4 bits), for the concrete type of frame to be arranged；BSS color field (occupies 8 bits), for the mark of BSS to be arranged.In order to be distinguished with traditional RTS frame, the numerical value being not used by can be set by the value of Subtype value field, such as 0101 (traditional RTS frame is 1011), or, the numerical value being not used by, such as 01 (traditional RTS frame is 00) are set by the value of protocol version field.If subtype protocol version is different from traditional RTS frame, bit 8 can be fully utilized to bit 15 in BSS color.

If subtype protocol version is identical as traditional RTS frame, so need to be indicated that this is the first control frame of the first kind with 1 bit, it can be from a bit in 8 bits of BSS color, such as bit 15, it is distinguished with traditional RTS frame, with other remaining 7 bits To indicate BSS color.

Further, it if indicated with bit 15, needs to be further added by a situation except the case where existing Comparison of standards spy 15 sets 1 to set 1, to indicate that first control frame of the first kind includes BSS color.In this case, illustrate that currently transmitted equipment is that have the equipment of herein described function (i.e. 11ax), rather than traditional equipment.

First Duration field (occupies 16 bits), in order to distinguish with the Duration field in the second control frame, is named as the first Duration field here.In the present embodiment, the value of the first Duration field are as follows:+2 times of short interFrameGap SIFS duration+the first control frame of first kind durations of duration of the subsequent data transmission of estimation.Legacy-STA and the HEW-STA for having neither part nor lot in data transmission (not being scheduled) will update NAV according to this value, and the HEW-STA for participating in data transmission will determine the size for the data transmitted according to this value.

Receiving end address RA field (occupies 48 bits), is set as a preset numerical value or parameter, such as can be BSSID.

Transmitting terminal address TA field (occupies 48 bits), is set as the MAC Address of HEW-AP.

Frame Check Sequence (Frame Check Sequence, FCS) (occupies 32 bits), carries out Cyclical Redundancy Check (Cyclic Redundancy Check, CRC) verification for the MAC Address to described access point.

The first control frame of the first kind is identical as traditional RTS frame based on the frame format of physical layer protocol, as shown in Figure 6, including traditional Short Training domain (Legacy Short Training Field, L-STF) field, traditional long training domain (Legacy Long Training Field, L-LTF) field, traditional signaling domain (Legacy Signal Field, L-SIG) field and data data field.

After S403:HEW-STA identifies the first control frame of the first kind according to Frame Control field, it is confirmed whether in the BSS in BSS color instruction, if so, S404 is executed, if not, executing S405；

S404:HEW-STA replys the second control frame to HEW-AP；

Frame structure of second control frame based on mac-layer protocol as shown in fig. 7, comprises:

Frame controls Frame Control field (occupying 16 bits), protocol version protocol version field (occupying 2 bits) is specifically included, for the version of agreement to be arranged；Type the type field (occupies 2 bits), for the general type of frame to be arranged；Subtype value field (occupies 4 bits), For the concrete type of frame to be arranged；BSS color field (occupies 8 bits), for the mark of BSS to be arranged.In order to be distinguished with traditional RTS frame, the numerical value being not used by can be set by the value of Subtype value field, such as 0101 (traditional RTS frame is 1100), or, the numerical value being not used by, such as 01 (traditional RTS frame is 00) are set by the value of protocol version field.If subtype protocol version is different from traditional RTS frame, bit 8 can be fully utilized to bit 15 in BSS color.

If subtype protocol version is identical as traditional RTS frame, needs to be indicated that this is the second control frame, such as bit 15 with 1 bit, indicate BSS color with other remaining 7 bits.

Further, it if indicating that this is the second control frame with bit 15, needs to be further added by a situation except the case where existing Comparison of standards spy 15 sets 1 to set 1, to indicate that second control frame includes BSS color.In this case, illustrate that currently transmitted equipment is that have the equipment of herein described function (i.e. 11ax), rather than traditional equipment.

2nd Duration field (occupies 16 bits).In the present embodiment, the value of the first Duration field are as follows:+2 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.

Legacy-STA and HEW-STA can update NAV according to the value of the 2nd Duration field, and HEW-AP then passes through the size that this value judges data transmission.

FCS field (occupies 32 bits), carries out CRC check for the MAC Address to described access point.

In the present embodiment, frame structure of second control frame based on physical layer protocol shown in Fig. 7 is as shown in Figure 8, comprising: L-STF field, L-LTF field, L-SIG field and data data field.

That is, in the present embodiment, all HEW-STA in this BSS reply identical second control frame, it is the second control frame which HEW-STA is replied without HEW-AP differentiation.

S405: if being not in this BSS and being interfered to the data transmission in this BSS, value of the HEW-STA according to the first Duration field in the first control frame of the first kind, or the value (identical both in the present embodiment) of second the second field in control frame, Lai Gengxin NAV；

S406 (is not drawn into) in figure: Legacy-STA can not identify the first control frame of the first kind, according to the value of the first Duration field or the value (the two is identical in the present embodiment) of the second field, Lai Gengxin NAV.

The above are the control processes of data transmission, after completing above procedure, HEW-STA in HEW-AP and this BSS can start data transmission, specifically, uplink can be with process are as follows: after HEW-AP receives the second control frame, sends data to HEW-STA, downlink transmission process can be with are as follows: HEW-AP is received after the second control frame, data-triggered frame is sent to HEW-STA, after HEW-STA receives data-triggered frame, determines whether to send data according to resource distribution instruction information therein.

It can be seen that from the process in the present embodiment, pass through the improvement to existing RTS frame and CTS frame structure, so that HEW-AP can control multiple HEW-STA and carry out data transmission with it, to promote resource utilization, also, Duration field is remained in the first kind the first control frame frame and the second control frame, is allowed and the website for being not involved in data transmission and noisy website is transmitted to data is updated NAV, to keep silent during data frame transfer, the interference to data frame is avoided.

Embodiment 17

Another data transfer control method disclosed in the embodiment of the present application, as shown in Figure 9, comprising the following steps:

S901:HEW-AP listens to channel；

After S902:HEW-AP listens to an idle channel, if the length for the buffer that the length of the buffer buffer of access point or website report is greater than preset threshold, by this idle channel, the first control frame of Second Type is sent；

In the present embodiment, frame structure of the first control frame of Second Type based on mac-layer protocol is as shown in Figure 10, comprising:

Frame controls Frame Control field (occupying 16 bits), and the structure and function of this field are same as shown in Figure 5, and which is not described herein again.

First Duration field (occupies 16 bits).It is different from Fig. 5 to be, in the present embodiment, the value of the first Duration field are as follows:+3 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.Legacy-STA (is not adjusted with data transmission is had neither part nor lot in Degree) HEW-STA NAV can be updated according to this value, the HEW-STA for participating in data transmission will determine the size of data transmitted according to this value.

Receiving end address RA field (occupies 48 bits), different from Fig. 5 to be, in the present embodiment, indicates the mark of the website of the first default integer in the BSS.

Transmitting terminal address TA field (occupies 48 bits), it is different from Fig. 5 to be, in the present embodiment, it indicates the mark of the website of the first default integer in the BSS, as shown in Figure 10, partial association mark (the Partial Association Identification of 4 STA is respectively included in RA and TA, PAID), it is limited to byte number shared by TA and RA, so, the first integer and the second integer are 4 (number of 8 marks successively can be 1-8).

The function of FCS field (occupying 32 bits) is identical as frame structure shown in fig. 5.

Frame format of the first control frame of Second Type based on physical layer protocol is as shown in Figure 6.

That is, being not only to be directed toward, but also indicate the mark for allowing to participate in the HEW-STA of data transmission with BSS color, more targetedly in the present embodiment.

After S903:HEW-STA identifies the first control frame of Second Type according to Frame Control field, it is confirmed whether in the BSS in BSS color instruction and whether PAID is included in the first control frame of Second Type, if so, executes S904, if not, executing S905 or S906；

S904:HEW-STA replys the second control frame to HEW-AP；

In the present embodiment, the frame structure of the second control frame be may refer to shown in Fig. 7 and Fig. 8, and which is not described herein again.

S905: if interfered not in this BSS and to the data transmission in this BSS, value of the HEW-STA according to the first Duration field in the first control frame of Second Type, and/or the value (different both in the present embodiment) of second the second field in control frame, Lai Gengxin NAV；

S906: if in this BSS, but its PAID is not carried in the first control frame of Second Type, value of the HEW-STA according to the first Duration field in the first control frame of Second Type, and/or the value (different both in the present embodiment) of second the second field in control frame, Lai Gengxin NAV；

S907 (is not drawn into) in figure: Legacy-STA can not identify the first control frame of Second Type, according to the value of the first Duration field and/or the value (difference both in the present embodiment) of the second field, Lai Gengxin NAV.

Specifically, in the value and the second control frame of the first Duration field in the first control frame In the case that the value of second field is different, NAV can be updated according to the Duration field value in the frame first received, then the Duration field value in the frame received according to after updates NAV.

In the present embodiment, although it is the second control frame which HEW-STA is replied that HEW-AP, which does not know, HEW-AP can carry out data transmission with the HEW-STA for having replied the second control frame, and the detailed process of data transmission may refer to above-described embodiment, and which is not described herein again.

Method described in the present embodiment, HEW-AP also specify specific HEW-STA other than specified BSS, thus more targetedly.

It should be noted that, because STA can be converted between HEW mode and Legacy mode, so, if HEW-AP specified STA is currently at Legacy mode, then it can not identify the first control frame of Second Type, to not reply the second control frame, HEW-AP can be communicated with the HEW-STA for replying the second control frame, and Legacy-STA keeps silent in this communication process.

Embodiment 18

Another data transfer control method disclosed in the embodiment of the present application, as shown in figure 11, comprising the following steps:

S1101:HEW-AP listens to channel；

S1102: if HEW-AP listens to multiple idle channels, HEW-AP sends the first control frame of Second Type on each idle channel；

As shown in figure 12, HEW-AP competition sends identical the first control frame of Second Type to the idle channel of multiple 20MHZ on each idle channel.

In the present embodiment, the frame structure of the first control frame of Second Type is as shown in Figure 10 and Fig. 6, and which is not described herein again.

After S1103:HEW-STA identifies the first control frame of Second Type according to Frame Control field, it is confirmed whether in the BSS in BSS color instruction and whether PAID is included in the first control frame of Second Type, if so, executes S1104, if not, executing S1105 or S1106；

S1104:HEW-STA replys the second control frame to HEW-AP, and similarly, HEW-STA can also send the second control frame by multiple idle channels；

In the present embodiment, frame structure of second control frame based on mac-layer protocol as shown in fig. 7, this In repeat no more.Unlike the embodiments above, frame structure of second control frame based on physical layer shown in Fig. 7 is as shown in figure 13, comprising:

Structure and OFDMA symbol shown in Figure 13, include a preset duration (To Be Defined, TBD) between the two, and TBD is less than or equal to SIFS duration.Wherein, it include N number of resource unit RU in OFDMA symbol, the mark of this website is carried in RU corresponding with current site, each RU corresponds to different websites, and N is that third presets integer, with the mark of website in the first control signal frame of Second Type described in Figure 10 correspondingly, third, which presets integer, can be equal to or more than the sum of the first default integer and the second default integer, such as N=9, in the case, as shown in figure 13, intermediate RU can not have to the free time.The sequence of site identity can be with the mode sequence consensus of the mark of website in the first control signal frame of Second Type described in Figure 10.

S1105: if interfered not in this BSS and to the data transmission in this BSS, value of the HEW-STA according to the first Duration field in the first control frame of Second Type, and/or the value (different both in the present embodiment) of second the second field in control frame, Lai Gengxin NAV；

S1106: if in this BSS but its mark does not carry in the first control frame of Second Type, value of the HEW-STA according to the first Duration field in the first control frame of Second Type, and/or the value (different both in the present embodiment) of second the second field in control frame, Lai Gengxin NAV；

S1107 (is not drawn into) in figure: Legacy-STA can not identify the first control frame, according to the value of the first Duration field and/or the value (difference both in the present embodiment) of the second field, Lai Gengxin NAV.

In the present embodiment, HEW-STA informs mark in the second control frame of reply, so that it is the second control frame which HEW-STA is replied that HEW-AP, which is able to know that,.

Embodiment 19

Another data transfer control method disclosed in the embodiment of the present application, as shown in figure 14, comprising the following steps:

S1401:HEW-STA1 listens to channel；

S1402: if it find that idle (multiple) channel, HEW-STA sends the first control frame to HEW-AP by (multiple) channel；

In the present embodiment, the purpose that HEW-STA1 sends the first control frame is to inform HEW-AP In the presence of idle channel, the BSS color of this HEW-STA1 is carried in the first control frame, can be any one in the first control frame of the first control frame of the first kind and Second Type.

S1403:HEW-AP sends the first control frame of Second Type；

First control frame of Second Type is as shown in Figure 10, and BSS color therein is the BSS color carried in the first control frame received in previous step.It should be noted that the first control frame of Second Type can carry the PAID of HEW-STA1, this PAID can not also be carried, if not carrying this PAID, the control process that can be carried out data transmission by other data frames and HEW-STA1.

S1404: other HEW-STA (indicate) that the second control frame of reply, the second control frame may refer to shown in Fig. 7 and shown in Fig. 8 in the first control frame of Second Type；

S1405: the HEW-STA and Legacy-STA for not being designated to participate in data transmission update NAV.

In the present embodiment, HEW-STA and HEW-AP also can use multiple idle channel transmitting data frames.

In the present embodiment, HEW-AP is given by HEW-STA competitive channel and by the scheduling controlling power of data transmission, equally can improve bandwidth availability ratio under the premise of evading interference.

Embodiment 20

With above method embodiment correspondingly, the embodiment of the present application also discloses a kind of access point, as shown in figure 16, comprising:

First sending module 1601; for sending the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

Data transmission module 1602 carries out data transmission between the website if the mark for the basic service set that the second control frame for website feedback carries is identical as the mark of the basic service set that first control frame carries.

In the present embodiment, the specific frame structure of the first control frame be may refer to described in above method embodiment, and which is not described herein again.

Specifically, the specific implementation that the first sending module sends the first control frame can be with are as follows: true After recognizing channel idle, or in confirmation there are in the case where at least two idle channels, at least two idle channel of Xiang Suoshu sends the first control frame；Alternatively, sending first control frame if the length for the buffer that the length of the buffer buffer of described access point or the website report is greater than preset threshold.

The specific implementation of first sending module acknowledgement channel free time can be with are as follows: listens to idle channel；Alternatively, the first control frame that receiving station is sent, the mark of basic service set locating for the website is carried in first control frame.

Access point described in the present embodiment, the first control frame based on transmission enable to multiple websites within the same period while accessing, to improve bandwidth availability ratio.

Embodiment 21

The embodiment of the present application also discloses a kind of website, as shown in figure 17, comprising:

First receiving module 1701, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and the mark for carrying basic service set；

First processing module 1702 replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.

Optionally, can also include:

Second sending module 1703, for listening to idle channel before receiving the first control frame that access point is sent；First control frame is sent to described access point, the mark of basic service set locating for the website is carried in first control frame, first control frame is used to inform that described access point to have idle channel.

The frame structure of second control frame described in the present embodiment may refer to described in above method embodiment, and which is not described herein again.

Specifically, first processing module determines that the website can be with to the specific implementation that interferes of data transmission in the basic service set are as follows: determines the CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.

Specifically, first processing module replys the specific implementation of the second control frame to described access point It can be with are as follows: send the first control frame to described access point using at least two idle channels.

Website described in the present embodiment is realized under the premise of not interfering data to transmit in the case where receiving the mark for carrying BSS of access point transmission, feeding back the second control frame or updating NAV, improves the purpose of bandwidth availability ratio.

Embodiment 22

Another website disclosed in the embodiment of the present application, as shown in figure 18, comprising:

Second receiving module 1801, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set；

Second processing module 1802 replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website and the mark of the website carries in first control frame；If the website is in the basic service set but its mark does not carry in first control frame, depending at least on the value of the first Duration field, NAV is updated；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.

Third sending module 1803, for listening to idle channel before receiving the first control frame that access point is sent；First control frame is sent to described access point, the mark of basic service set locating for the website is carried in first control frame, first control frame is used to inform that described access point to have idle channel.

In the present embodiment, the frame structure of the second control frame be may refer to described in above method embodiment, and which is not described herein again.

Specifically, Second processing module determines that the website can be with to the specific implementation that interferes of data transmission in the basic service set are as follows: determines the CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.

Specifically, Second processing module can be with to the specific implementation that described access point replys the second control frame are as follows: sends the first control frame to described access point using at least two idle channels.

Website described in the present embodiment, in the mark for carrying BSS for receiving access point transmission Know and the mark of website that allows to carry out data transmission in the case where, feed back the second control frame or update NAV, realize under the premise of not interfering data to transmit, improve the purpose of bandwidth availability ratio.

Embodiment 23

Another access point disclosed in the embodiment of the present application, comprising:

Transmitter; for sending the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

Processor carries out data transmission between the website if the mark for the basic service set that the second control frame for website feedback carries is identical as the mark of the basic service set that first control frame carries.

Memory, in storage processor program and program operation process in the data that generate.

Wherein, transmitter, processor and memory can be communicated by bus.

The concrete function realization of access point described in the present embodiment may refer to above method embodiment, and which is not described herein again.

Embodiment 24

Another website disclosed in the embodiment of the present application, comprising:

Receiver, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and the mark for carrying basic service set；

Processor replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.

Wherein, receiver, processor and memory can be communicated by bus.

The concrete function realization of website described in the present embodiment may refer to above method embodiment, and which is not described herein again.

Embodiment 25

Receiver, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set；

Processor replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website and the mark of the website carries in first control frame；If the website is in the basic service set but its mark does not carry in first control frame, depending at least on the value of the first Duration field, NAV is updated；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.

Wherein, receiver, processor and memory can be communicated by bus.

If function described in the present embodiment method is realized in the form of SFU software functional unit and when sold or used as an independent product, can store in a storage medium readable by a compute device.Based on this understanding, the part of the part that contributes to existing technology of the embodiment of the present invention or the technical solution can be embodied in the form of software products, the software product is stored in a storage medium, it uses including some instructions so that a calculating equipment (can be personal computer, server, mobile computing device or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), the various media that can store program code such as magnetic or disk.

Each embodiment in this specification is described in a progressive manner, and the highlights of each of the examples are differences from other embodiments, same or similar part be may refer to each other between each embodiment.

The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or make With the present invention.Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will not be limited to the embodiments shown herein, and is to fit to the widest scope consistent with the principles and novel features disclosed herein.

Claims

A kind of data transfer control method characterized by comprising

Access point sends the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

If the mark for the basic service set that the second control frame of website feedback carries is identical as the mark of the basic service set that first control frame carries, carry out data transmission between described access point and the website.
The method according to claim 1, wherein first control frame includes: the first control frame of the first kind, first control frame of the first kind based on including: in the frame format of mac-layer protocol

First Duration field, the frame before the first Duration field control Frame Control field, the receiving end address RA field after the first Duration field, the transmitting terminal address TA field after the RA field, and the Frame Check Sequence FCS after the TA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, the RA field is for indicating predetermined value, the TA field is used to indicate that the MAC address of described access point, the FCS to be used to carry out CRC check to the MAC Address of described access point.
According to the method described in claim 2, it is characterized in that, the value of the first Duration field in the first control frame of the first kind are as follows:

+ 2 times of short interFrameGap SIFS durations of duration+the first control frame of first kind duration of the subsequent data transmission of estimation.
The method according to claim 1, wherein first control frame includes: the first control frame of Second Type, first control frame of Second Type based on including: in the frame format of mac-layer protocol

First Duration field, the frame before the first Duration field control Frame Control field, the receiving end address RA field after the first Duration field, the transmitting terminal address TA field after the RA field, and the Frame Check Sequence FCS after the TA field；

Wherein, it include protocol version protocol version field in the Frame Control field, type the type field after the protocol version field, the mark BSS color field of subtype Subtype value field after the type field and the basic service set after the Subtype value field, the RA field is used to indicate the mark of the website of the first default integer in the basic service set, the TA field is used to indicate the mark of the website of the second default integer in the basic service set, the FCS is used to carry out CRC check to the MAC Address of described access point.
According to the method described in claim 4, it is characterized in that, the value of the first Duration field in the first control frame of the Second Type are as follows:

+ 3 times of short interFrameGap SIFS durations of duration+second control frame duration+data-triggered frame duration of the subsequent data transmission of estimation.
Method according to any one of claims 1 to 5, which is characterized in that described access point sends the first control frame and includes:

Access point sends the first control frame after acknowledgement channel is idle；

Alternatively, access point confirmation there are in the case where at least two idle channels, at least two idle channel of Xiang Suoshu sends the first control frame.
According to the method described in claim 6, it is characterized in that, the method for described access point acknowledgement channel free time includes:

Described access point listens to idle channel；Alternatively, the first control frame that described access point receiving station is sent, the mark of basic service set locating for the website is carried in first control frame.
Method according to any one of claims 1 to 7, which is characterized in that the first control frame of the transmission includes:

If the length for the buffer that the length of the buffer buffer of described access point or the website report is greater than preset threshold, first control frame is sent.
A kind of data transfer control method characterized by comprising

Website receives the first control frame that access point is sent, and first control frame includes first Duration field and the mark for carrying basic service set；

If the website is in the basic service set, the website replys the second control frame to described access point, and second control frame carries the mark of the basic service set；

If the website is not in the basic service set and interferes to the data transmission in the basic service set, the website updates NAV depending at least on the value of the first Duration field.
According to the method described in claim 9, it is characterized in that, the mark that second control frame carries the basic service set includes:

Second control frame carries the mark of the basic service set based on the frame format of mac-layer protocol；

Second control frame is based in the frame format of mac-layer protocol further include:

2nd Duration field, the value of the 2nd Duration field are used to indicate described access point and participate in carrying out data transmission required protection duration between the website in the basic service set.
According to the method described in claim 10, it is characterized in that, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, the RA field after the 2nd Duration field, and the FCS field after the RA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, for indicating predetermined value, the FCS field is used to carry out CRC check to the MAC Address of described access point the RA field.
According to the method described in claim 10, it is characterized in that, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, after the 2nd Duration field, the RA field before BSS color field, and the FCS field after the BSS color field.
According to the described in any item methods of claim 9 to 12, which is characterized in that described second Frame structure of the control frame based on physical layer protocol include:

L-STF field, L-LTF field, L-SIG field and data data field.
According to the method for claim 13, which is characterized in that second control frame is based in the frame structure of physical layer protocol further include:

OFDMA symbol before the L-STF field includes N number of resource unit RU in the OFDMA symbol, and the mark of the website is carried in RU corresponding with the website, and each RU correspond to different websites, and N is the default integer of third；

Preset duration TBD between the OFDMA symbol and the L-STF field, the TBD are less than or equal to SIFS duration.
Method according to any one of claims 10 to 14, which is characterized in that the value of the 2nd Duration field are as follows:

+ 2 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.
According to the described in any item methods of claim 9 to 15, which is characterized in that the data transmission in the basic service set, which interferes, includes:

The CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.
According to the described in any item methods of claim 9 to 16, which is characterized in that the website replys the second control frame to described access point and includes:

The website sends the first control frame to described access point using at least two idle channels.
According to the described in any item methods of claim 9 to 17, which is characterized in that before the first control frame that the website receives that access point is sent, further includes:

The website listens to idle channel；

The website sends first control frame to described access point, and the mark of basic service set locating for the website is carried in first control frame, and first control frame is used to inform that described access point to have idle channel.
A kind of data transfer control method characterized by comprising

Website receives the first control frame that access point is sent, and first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set Know；

If the website is in the basic service set and the mark of the website carries in first control frame, the website replys the second control frame to described access point, and second control frame carries the mark of the basic service set；

If the website is in the basic service set but the mark of the website does not carry in first control frame, the website updates NAV depending at least on the value of the first Duration field.
According to the method for claim 19, which is characterized in that further include:

If the website is not in the basic service set and interferes to the data transmission in the basic service set, the website updates NAV depending at least on the value of the first Duration field.
Method described in 9 or 20 according to claim 1, which is characterized in that the mark that second control frame carries the basic service set includes:

Second control frame is based on the mark for carrying the basic service set in the frame format of mac-layer protocol；

Second control frame is based in the frame format of mac-layer protocol further include:

2nd Duration field, the value of the 2nd Duration field are used to indicate described access point and participate in carrying out data transmission required protection duration between the website in the basic service set.
According to the method for claim 21, which is characterized in that second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, the RA field after the 2nd Duration field, and the FCS field after the RA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, for indicating predetermined value, the FCS field is used to carry out CRC check to the MAC Address of described access point the RA field.
According to the method for claim 21, which is characterized in that second control frame is based on In the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, after the 2nd Duration field, the RA field before BSS color field, and the FCS field after the BSS color field.
9 to 23 described in any item methods according to claim 1, which is characterized in that the frame structure of second control frame based on physical layer protocol include:

L-STF field, L-LTF field, L-SIG field and data data field.
According to the method for claim 24, which is characterized in that second control frame is based in the frame structure of physical layer protocol further include:

OFDMA symbol before the L-STF field includes N number of resource unit RU in the OFDMA symbol, and the mark of the website is carried in RU corresponding with the website, and each RU correspond to different websites, and N is the default integer of third；

Preset duration TBD between the OFDMA symbol and the L-STF field, the TBD are less than or equal to SIFS duration.
According to the described in any item methods of claim 21 to 25, which is characterized in that the value of the 2nd Duration field are as follows:

+ 2 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.
9 to 26 described in any item methods according to claim 1, which is characterized in that the data transmission in the basic service set, which interferes, includes:

The CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.
9 to 27 described in any item methods according to claim 1, which is characterized in that the website replys the second control frame to described access point and includes:

The website sends the first control frame to described access point using at least two idle channels.
9 to 28 described in any item methods according to claim 1, which is characterized in that before the first control frame that the website receives that access point is sent, further includes:

The website listens to idle channel；

The website sends first control frame to described access point, carries in first control frame The mark of basic service set locating for the website, first control frame are used to inform that described access point to have idle channel.
A kind of access point characterized by comprising

First sending module; for sending the first control frame; first control frame includes the first Duration field and the mark for carrying basic service set, and the value of the first Duration field is used to indicate to carry out data transmission required protection duration between the website in described access point and the basic service set；

Data transmission module carries out data transmission between the website if the mark for the basic service set that the second control frame for website feedback carries is identical as the mark of the basic service set that first control frame carries.
Access point according to claim 30, which is characterized in that first sending module is for sending the first control frame, comprising:

First sending module is specifically used for, and sends the first control frame of the first kind, and first control frame of the first kind based on including: in the frame format of mac-layer protocol

First Duration field, the frame before the first Duration field control Frame Control field, the receiving end address RA field after the first Duration field, the transmitting terminal address TA field after the RA field, and the Frame Check Sequence FCS after the TA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, the RA field is for indicating predetermined value, the TA field is used to indicate that the MAC address of described access point, the FCS to be used to carry out CRC check to the MAC Address of described access point.
Access point according to claim 31, which is characterized in that first sending module is specifically used for transmission the first control frame of the first kind and includes:

First sending module is specifically used for, send the first control frame of the first kind, the value of the first Duration field in first control frame of the first kind are as follows:+2 times of short interFrameGap SIFS durations of duration+the first control frame of first kind duration of the subsequent data transmission of estimation.
Access point according to claim 30, which is characterized in that first sending module is for sending the first control frame, comprising:

First sending module is specifically used for, and sends the first control frame of Second Type, includes: in first control frame of Second Type

First Duration field, the frame before the first Duration field control Frame Control field, the receiving end address RA field after the first Duration field, the transmitting terminal address TA field after the RA field, and the Frame Check Sequence FCS after the TA field；

Wherein, it include protocol version protocol version field in the Frame Control field, type the type field after the protocol version field, the mark BSS color field of subtype Subtype value field after the type field and the basic service set after the Subtype value field, the RA field is used to indicate the mark of the website of the first default integer in the basic service set, the TA field is used to indicate the mark of the website of the second default integer in the basic service set, the FCS is used to carry out CRC check to the MAC Address of described access point.
Access point according to claim 33, which is characterized in that first sending module is specifically used for transmission the first control frame of Second Type and includes:

First sending module is specifically used for, send the first control frame of Second Type, the value of the first Duration field in first control frame of Second Type are as follows:+3 times of short interFrameGap SIFS durations of duration+second control frame duration+data-triggered frame duration of the subsequent data transmission of estimation.
According to the described in any item access points of claim 30 to 34, which is characterized in that first sending module is used to send the first control frame and includes:

First sending module is specifically used for, and after acknowledgement channel is idle, sends the first control frame；Alternatively, at least two idle channel of Xiang Suoshu sends the first control frame in confirmation there are in the case where at least two idle channels.
Access point according to claim 35, which is characterized in that first sending module includes: for the acknowledgement channel free time

First sending module is specifically used for, and listens to idle channel；Alternatively, the first control frame that receiving station is sent, the mark of basic service set locating for the website is carried in first control frame.
According to the described in any item access points of claim 30 to 36, which is characterized in that first sending module is used to send the first control frame and includes:

First sending module is specifically used for, if the length for the buffer that the length of the buffer buffer of described access point or the website report is greater than preset threshold, sends first control frame.
A kind of website characterized by comprising

First receiving module, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and the mark for carrying basic service set；

First processing module replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website；If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.
The website according to claim 38, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, and replys the second control frame to described access point, second control frame carries the mark of the basic service set based on the frame format of mac-layer protocol；

Second control frame is based in the frame format of mac-layer protocol further include:

2nd Duration field, the value of the 2nd Duration field are used to indicate described access point and participate in carrying out data transmission required protection duration between the website in the basic service set.
Website according to claim 39, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, the RA field after the 2nd Duration field, and the FCS field after the RA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, the RA field is for indicating predetermined value, institute It states FCS field and carries out CRC check for the MAC Address to described access point.
Website according to claim 39, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, after the 2nd Duration field, the RA field before BSS color field, and the FCS field after the BSS color field.
According to the described in any item websites of claim 38 to 41, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, and replys the second control frame to described access point, the frame structure of second control frame based on physical layer protocol includes:

L-STF field, L-LTF field, L-SIG field and data data field.
Website according to claim 42, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of physical layer protocol further include:

OFDMA symbol before the L-STF field includes N number of resource unit RU in the OFDMA symbol, and the mark of the website is carried in RU corresponding with the website, and each RU correspond to different websites, and N is the default integer of third；

Preset duration TBD between the OFDMA symbol and the L-STF field, the TBD are less than or equal to SIFS duration.
According to the described in any item websites of claim 39 to 43, which is characterized in that the first processing module, which is used to reply the second control frame to described access point, includes:

The first processing module is specifically used for, the second control frame is replied to described access point, second control frame is based in the frame format of mac-layer protocol further include: the 2nd Duration field, the value of the 2nd Duration field are as follows:+2 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.
According to the described in any item websites of claim 38 to 44, which is characterized in that described One processing module is used to determine that the website to interfere the data transmission in the basic service set

The first processing module is specifically used for, and determines the CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.
According to the described in any item websites of claim 38 to 45, which is characterized in that the first processing module replys the second control frame to described access point and includes:

The first processing module is specifically used for, and sends the first control frame to described access point using at least two idle channels.
According to the described in any item websites of claim 38 to 46, which is characterized in that further include:

Second sending module, for listening to idle channel before receiving the first control frame that access point is sent；First control frame is sent to described access point, the mark of basic service set locating for the website is carried in first control frame, first control frame is used to inform that described access point to have idle channel.
A kind of website characterized by comprising

Second receiving module, for receiving the first control frame of access point transmission, first control frame includes the first Duration field and carries the mark of basic service set and the mark of the website in the basic service set；

Second processing module replys the second control frame to described access point, second control frame carries the mark of the basic service set if be in the basic service set for the website and the mark of the website carries in first control frame；If the website is in the basic service set but the mark of the website does not carry in first control frame, depending at least on the value of the first Duration field, NAV is updated.
Website according to claim 48, which is characterized in that the Second processing module is also used to:

If the website is not in the basic service set and interferes to the data transmission in the basic service set, depending at least on the value of the first Duration field, NAV is updated.
The website according to claim 48 or 49, which is characterized in that the Second processing module, which is used to reply the second control frame to described access point, includes:

The Second processing module is specifically used for, and replys the second control frame to described access point, and described the Two control frames are based on the mark for carrying the basic service set in the frame format of mac-layer protocol；

Second control frame is based in the frame format of mac-layer protocol further include: the 2nd Duration field, the value of the 2nd Duration field are used to indicate described access point and participate in carrying out data transmission required protection duration between the website in the basic service set.
Website according to claim 50, which is characterized in that the Second processing module, which is used to reply the second control frame to described access point, includes:

The Second processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, the RA field after the 2nd Duration field, and the FCS field after the RA field；

Wherein, it include the mark BSS color field of protocol version protocol version field, the type the type field after the protocol version field, the subtype Subtype value field after the type field and the basic service set after the Subtype value field in the Frame Control field, for indicating predetermined value, the FCS field is used to carry out CRC check to the MAC Address of described access point the RA field.
Website according to claim 50, which is characterized in that the Second processing module, which is used to reply the second control frame to described access point, includes:

The Second processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of mac-layer protocol further include:

Frame before the 2nd Duration field controls Frame Control field, after the 2nd Duration field, the RA field before BSS color field, and the FCS field after the BSS color field.
According to the described in any item websites of claim 48 to 52, which is characterized in that the Second processing module, which is used to reply the second control frame to described access point, includes:

The Second processing module is specifically used for, and replys the second control frame to described access point, the frame structure of second control frame based on physical layer protocol includes:

L-STF field, L-LTF field, L-SIG field and data data field.
Website according to claim 53, which is characterized in that the Second processing module is used Include: in replying the second control frame to described access point

The Second processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame structure of physical layer protocol further include:

OFDMA symbol before the L-STF field includes N number of resource unit RU in the OFDMA symbol, and the mark of the website is carried in RU corresponding with the website, and each RU correspond to different websites, and N is the default integer of third；

Preset duration TBD between the OFDMA symbol and the L-STF field, the TBD are less than or equal to SIFS duration.
According to the described in any item websites of claim 50 to 54, which is characterized in that the Second processing module, which is used to reply the second control frame to described access point, includes:

The Second processing module is specifically used for, and replys the second control frame to described access point, second control frame is based in the frame format of mac-layer protocol further include: the 2nd Duration field, the value of the 2nd Duration field are as follows:

+ 2 times of short interFrameGap SIFS duration+data-triggered frame durations of duration of the subsequent data transmission of estimation.
According to the described in any item websites of claim 48 to 55, which is characterized in that the Second processing module is used to determine that the website to interfere the data transmission in the basic service set and includes:

The Second processing module is specifically used for, and determines the CCA threshold value for receiving power and being greater than the basic service set OBSS of clear channel assessment (CCA) CCA threshold value or overlapping of the website.
According to the described in any item websites of claim 48 to 56, which is characterized in that the Second processing module replys the second control frame to described access point and includes:

The Second processing module is specifically used for, and sends the first control frame to described access point using at least two idle channels.
According to the described in any item websites of claim 48 to 57, which is characterized in that further include:

Third sending module, for listening to idle channel before receiving the first control frame that access point is sent；First control frame is sent to described access point, the mark of basic service set locating for the website is carried in first control frame, first control frame is used to inform that described access point to have idle channel.