CN102404082A - Method for sending initial frame, replying response frame and making channel appointment, device thereof and system thereof - Google Patents

Method for sending initial frame, replying response frame and making channel appointment, device thereof and system thereof Download PDF

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Publication number
CN102404082A
CN102404082A CN2010102805825A CN201010280582A CN102404082A CN 102404082 A CN102404082 A CN 102404082A CN 2010102805825 A CN2010102805825 A CN 2010102805825A CN 201010280582 A CN201010280582 A CN 201010280582A CN 102404082 A CN102404082 A CN 102404082A
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website
response frame
frame
answer
sequence
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CN102404082B (en
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田开波
李峰
姜静
孙波
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ZTE Corp
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ZTE Corp
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Priority to CN201010280582.5A priority Critical patent/CN102404082B/en
Priority to PCT/CN2011/076920 priority patent/WO2012031501A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems

Abstract

The invention discloses a method for sending an initial frame, replying a response frame and making a channel appointment, a device thereof and a system thereof, which are applied to multi users-multi input multi output (MU-MIMO) transmission. The method comprises that an access point is used for sending the initial frame, wherein the initial frame carries response frame indication information, and the response frame indication information is used for indicating stations for replying the response frame in MU-MIMO groups. By means of the method, the problem that each station in the MU-MIMO transmission cannot ensure whether replying the response frame is resolved. The access point can confirm whether the channel appointment is successful through response frame replied by the stations, and furthermore transmission efficiency of data is improved.

Description

Initial frame transmission, response frame answer, channel booking method, Apparatus and system
Technical field
The present invention relates to the communications field,, be used for multi-user's multiple-input and multiple-output MU-MIMO transmission in particular to a kind of initial frame transmission, response frame answer, channel booking method, Apparatus and system.
Background technology
(Wireless Local Area Networks is that the employing wireless communication technology is interconnected with computer equipment WLAN) to WLAN, and formation can the mutual communication and the network system that realizes resource-sharing.The characteristics of WLAN essence are not re-use telecommunication cable computer and network is coupled together, but connect through wireless mode, thereby make structure and terminal mobile more flexible of network.IEEE802.11 is one of mainstream technology of present WLAN, and this agreement is mainly stipulated physical layer (PHY) and media interviews control (MediaAccess Control, MAC) layer standard.
Along with the development of mobile communication technology and people raising to the wireless network demand; Physical layer specification constantly develops towards the increasingly high direction of speed; Successively experienced 802.11 to 802.11b and arrived 802.11a/g again, 802.11n then arrives the development course of 802.11ac at last.The actual physical technology also develops into OFDM (Orthogonal Frequency Division Multiplex from direct sequence spread spectrum skill; OFDM) technology; And in IEEE802.11n, introduced multi-antenna technology, in IEEE802.11ac, introduced big bandwidth and multi-user's multiple-input and multiple-output (MU-MIMO) technology.
In 802.11 present systems, before carrying out big transmission of data blocks, pass through RTS (Request To Send; Request is sent)/CTS (Clear To Send; The permission transmission) mechanism is carried out channel booking, to prevent that the multiple source website from simultaneously to purpose website transmission data, causing point of destination point data collision to occur receiving; Cause loss of data, the multiple source website under this scene is hidden website each other.The MAC Address of the TA territory indication emission website under this mechanism in the mac frame head of RTS frame; The MAC Address of RA territory indication receiving station; Reply CTS after the point of destination point is received RTS, the RA territory comprises the MAC Address of the website that sends the RTS frame in the mac frame head of CTS frame, after the website of transmission RTS frame is received the CTS that comprises MAC Address own; Think that promptly receiving-transmitting chain sets up successfully, carry out transfer of data subsequently.In addition; In the mac frame head of RTS frame and CTS frame, all comprise a Duration (duration) territory; It is said that be used to refer to the time of the defeated busy channel of registration; After the website of not participating in receiving and dispatching receives RTS frame or CTS frame, can not seize channel in the time period according to the indication of Duration territory, thereby avoid interference transceiver station.Adopt RTS/CTS mechanism can confirm that link is unimpeded between the transceiver station, and solve the hidden terminal problem around the website to a certain extent.
After in the 802.11ac system, introducing MU-MIMO; Source Site and channel of a plurality of purpose website functions; And based on present RTS/CTS mechanism, the mac frame head of RTS frame only comprises the MAC Address of a purpose website, can't carry the MAC Address of other websites; If the hiding website of Source Site is arranged around these websites, so just can't solve the reception data collision problem that these hiding websites cause.
Can know by foregoing; When a plurality of websites of access point under a MU-MIMO divides into groups in the system of employing MU-MIMO transmit big data block simultaneously; Need carry out channel booking, and the mac frame head of RTS frame only comprises the MAC Address of a purpose website, a plurality of websites under this MU-MIMO divides into groups are because of determining whether to need to reply the CTS frame; Cause the channel booking failure, and then influenced the efficiency of transmission of data.
Summary of the invention
Main purpose of the present invention is to provide a kind of initial frame transmission, response frame answer, channel booking method, Apparatus and system, is used for MU-MIMO transmission, to solve the problem that the website of above-mentioned MU-MIMO in dividing into groups can't determine whether to reply response frame.
According to an aspect of the present invention; A kind of initial frame sending method is provided; Be used for the MU-MIMO transmission, this method comprises: access point sends initial frame, wherein; Initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame.
According to another aspect of the present invention; A kind of response frame answering method is provided; Be used for the MU-MIMO transmission, this method comprises: the website during MU-MIMO divides into groups receives the initial frame from access point, wherein; Initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame; Website is replied indication information according to response frame and is determined whether to reply said response frame; If this website is replied said response frame, make above-mentioned access point confirm with this website between channel booking successfully.
The present invention also provides a kind of channel booking method; Be used for the MU-MIMO transmission, this method comprises: access point sends initial frame, wherein; Initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame; After website during MU-MIMO divides into groups receives initial frame, reply indication information according to response frame and determine whether to reply response frame; If website is replied response frame; After access point receives the response frame that website replys, confirm and website between the channel booking success.
According to a further aspect in the invention; A kind of access point is provided; Comprise: the initial frame sending module is used to send initial frame, wherein; Initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating multi-user's multiple-input and multiple-output MU-MIMO to divide into groups to reply the website of response frame.
According to another aspect of the invention; A kind of website is provided; Comprise: receiver module is used to receive the initial frame from access point, wherein; Initial frame carries response frame and replys indication information, and response frame is replied the website that multi-user's multiple-input and multiple-output MU-MIMO that indication information is used for indicating this website place divides into groups to reply response frame; Response frame is replied module, is used for replying indication information according to above-mentioned response frame and determines whether to reply said response frame; If reply this response frame.
In accordance with a further aspect of the present invention, a kind of channel booking system is provided, has comprised: above-mentioned access point and website.Be that access point comprises: the initial frame sending module, be used to send initial frame, wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating multi-user's multiple-input and multiple-output MU-MIMO to divide into groups to reply the website of response frame; The channel booking determination module, be used to receive the response frame that website replys after, confirm and website between the channel booking success; Website comprises: receiver module is used to receive the initial frame from access point; Response frame is replied module, is used for replying indication information according to response frame and determines whether to reply response frame; If reply response frame.
Through the present invention; Adopt access point when sending initial frame, to carry response frame and reply indication information, make the purpose website determine whether to reply response frame, and then accomplish channel booking according to this information; Solved that access point does not provide the problem that whether need reply the response frame indication in the MU-MIMO transmission; And make MU-MIMO reply indication information answer response frame according to response frame, and accomplish channel booking, improved data transmission efficiency.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the channel booking method in the MU-MIMO transmission of the embodiment of the invention;
Fig. 2 is the structured flowchart according to the access point of the embodiment of the invention;
Fig. 3 is the structured flowchart according to the website of the embodiment of the invention;
Fig. 4 is the structured flowchart according to the channel booking system of the embodiment of the invention;
Fig. 5 is the structured flowchart according to the channel booking system in the MU-MIMO transmission of the embodiment of the invention 5;
Fig. 6 is the concrete structure block diagram according to the channel booking system in the MU-MIMO transmission of the embodiment of the invention 5.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
It is the transmission means of one-to-many or multi-to-multi that the embodiment of the invention is considered in the MU-MIMO transmission; Access point (AP; Access Point) to a plurality of purpose websites (STA, station) transmission is during data, for the data that guarantee to transmit can successfully be received by the purpose website; Before the transmission data; AP and purpose website are realized channel booking through initial frame and response frame, so that other equipment can not seized this channel during its this channel of reservation use, guarantee that the channel between this AP and purpose website is unimpeded.Based on this, the embodiment of the invention provides a kind of initial frame transmission, response frame answer, channel booking method, device and system, and wherein this device is access point and website, is used for the MU-MIMO transmission.
This initial frame sending method comprises: access point sends initial frame, and wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame.
Preferably, before access point sent initial frame, this method also comprises: access point notified the MU-MIMO grouping information to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping; Correspondingly, response frame reply indication information be according to this sequence of positions information indicate successively MU-MIMO divide into groups in each website whether reply the information of response frame.
Preferably, initial frame also carries primary website indication information, the for example MAC Address of website.When concrete the realization, response frame is replied indication information can be the data fluxion of each website.
After access point receives the response frame that website replys, confirm with this website between channel booking successfully.
Above-mentioned response frame answering method is used for the MU-MIMO transmission, and this method comprises:
1) website during MU-MIMO divides into groups receives the initial frame from access point, and wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame;
2) this website is replied indication information according to response frame and is determined whether to reply response frame; If website is replied response frame, make access point confirm and website between the channel booking success.Otherwise will not reply response frame.
Website during MU-MIMO divides into groups receives before the initial frame from access point; This method also comprises: the website during MU-MIMO divides into groups receives the MU-MIMO grouping information from access point; Wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping; Correspondingly, this website answer response frame comprises: this website is confirmed the answer order of response frame according to response frame answer indication information and sequence of positions information; Wherein, response frame reply indication information be according to sequence of positions information indicate successively MU-MIMO divide into groups in each website whether reply the information of response frame; Answer refers to the precedence of other website answer response frame in website and the MU-MIMO grouping in proper order; This website is replied response frame according to the order of confirming.
This website replys indication information according to response frame and sequence of positions information confirms that the answer of response frame comprises following multiple mode in proper order, can select for a post kind of a mode during realization.
Mode one: website is replied indication information according to response frame and is confirmed that each website all need be replied response frame in the MU-MIMO grouping; Website confirms that the answer of response frame is the corresponding order of sequence of positions information in proper order.
Mode two: website replys indication information according to response frame and sequence of positions information confirms whether self replys response frame; If website obtains new sequence of positions with the website deletion that need not reply response frame in the sequence of positions information, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order; If, do not reply response frame.
Mode three: when the initial frame that website receives also carried primary website indication information, website was replied indication information according to response frame and confirmed that with sequence of positions information the answer of response frame comprises in proper order: website judges according to primary website indication information whether self is primary website; If, reply indication information according to response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order; If not; Primary website in the sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in the order information of position, the sequence of positions that must make new advances, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order.
Mode four: when response frame answer indication information was the data fluxion of each website, website replys indication information according to response frame and sequence of positions information confirms that the answer of response frame comprises in proper order: website sorts according to each website in the big young pathbreaker MU-MIMO grouping of data fluxion; Website confirms that the answer of response frame is the order after the ordering in proper order.
When the data fluxion of a plurality of websites equated, website can be confirmed the ordering between a plurality of websites according to sequence of positions information.
The embodiment of the invention also provides a kind of channel booking method, is used for the MU-MIMO transmission, and this method comprises:
1) access point sends initial frame, and wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame;
2) after the website during MU-MIMO divides into groups receives initial frame, reply indication information according to response frame and determine whether to reply response frame; If website is replied response frame;
3) after this access point receives the response frame that website replys, confirm and website between the channel booking success.
Access point sends before the initial frame, and method also comprises: access point notifies the MU-MIMO grouping information to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping; Correspondingly, response frame reply indication information be according to sequence of positions information indicate successively MU-MIMO divide into groups in each website whether reply the information of response frame;
Above-mentioned website is replied response frame and comprised: website is confirmed the answer order of response frame according to response frame answer indication information and sequence of positions information; Wherein, answer refers to the precedence of other website answer response frame in website and the MU-MIMO grouping in proper order; Website is replied response frame according to the order of confirming.
Describe in the IEEE802.11 system, to be embodied as example below, wherein, the RTS frame in the initial frame using system, the CTS frame in the response frame using system, response frame is replied the data flow indication information in the multiplexing RTS frame of indication information.Those skilled in the art also can realize based on the implementation under this system in other systems.
Fig. 1 shows the flow chart according to the channel booking method in the MU-MIMO transmission of the embodiment of the invention, and this method may further comprise the steps:
Step S102, access point sends the RTS frame, and wherein, this RTS frame carries response frame and replys indication information.
Wherein, response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame, and the response frame indication information of present embodiment is multiplexing in the data flow indication information; The data flow indication information can be dosed the N at the RTS frame STSIn the territory;
Step S104 after the website during MU-MIMO divides into groups receives above-mentioned RTS frame, determines whether to reply the CTS frame according to above-mentioned data flow indication information;
Step S 106, and this website is replied the CTS frame after confirming to reply the CTS frame;
After this website is confirmed to reply the CTS frame, can confirm the answer order according to the data flow indication information.Wherein, answer refers to the precedence of other website answer CTS frame in this website and the MU-MIMO grouping in proper order;
Each website can confirm which the corresponding concrete MU-MIMO of this RTS frame is grouped into according to the combination of one or more indication informations in the group character information in the RTS frame, receiver address RA territory indication information and the data flow indication information territory etc.; Concrete implementation; Can realize with reference to correlation technique; For example: each MU-MIMO grouping has a packet number; Each MU-MIMO divides into groups and packet number is an one-to-one relationship, utilizes in the RTS frame group character packets of information number can confirm that the pairing MU-MIMO of RTS frame divides into groups.
After step S108, access point receive above-mentioned CTS frame, confirm with above-mentioned website between channel booking successfully.
Possibly have a lot of websites in the real network, access point can be divided into a plurality of MU-MIMO with these websites according to the channel condition information of each website and divide into groups, and the website number during each MU-MIMO divides into groups is N, and N is a variable, can set as required.For not enough N grouping, can dose with virtual website.Website during access point divides into groups to each according to the position of N website sorts, and obtains the sequence of positions of each website under this grouping.
Preferably, above-mentioned access point sends before the RTS frame, and said method also comprises: access point notifies the MU-MIMO grouping information to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping; Correspondingly, above-mentioned response frame indication information be according to sequence of positions information indicate successively this MU-MIMO divide into groups in each website whether reply the information of response frame.This information can be used following two kinds of expression modes, and a kind of is to show with the data flow numerical table, when the website corresponding data flow is not 0; Explain that then this website need reply response frame; Be the CTS frame in the present embodiment, when the website corresponding data flow is 0, explain that then this website need not reply response frame; Another kind is with specific character representation; For example use " 0 " (or " N ") expression need not reply response frame; Need to reply response frame with " 1 " (or " Y ") expression, access point when the transmission initial frame, with this information to inform each website with site location order corresponding mode.
For example: current MU-MIMO has 4 websites in dividing into groups, and is respectively STA-1, STA-2, STA-3, STA-4; The sequence of positions of these 4 websites is: STA-3, STA-1, STA-2, STA-4; And STA-1, STA-2, STA-3, STA-4 corresponding data flow number are N1, N2, N3, N4; Then the data flow indication information can be N3, N1, N2, N4; The sequence of positions of all knowing each website under this grouping because of each website is STA-3, STA-1, STA-2, STA-4; So according to the corresponding relation of data flow indication information and sequence of positions, after each website is received the RTS frame, all can determine STA-1, STA-2, STA-3, STA-4 corresponding data flow number is N1, N2, N3, N4.
If it is one or more that access point require to be replied the website of CTS, then at the N of RTS frame STSThe data fluxion of this STA of this MU-MIMO transmission of relevant position indication in the territory is non-vanishing.
Preferably, the answer of the definite CTS frame among the step S 104 comprises in proper order: above-mentioned website is according to the data fluxion of each website in the MU-MIMO grouping and the answer order that above-mentioned sequence of positions is confirmed the CTS frame.Concrete definite mode can be following any mode:
Mode one: this website confirms that according to the data flow indication information data flow number average of each website in the MU-MIMO grouping is not 0; This website confirms that the answer of CTS frame is the corresponding order of above-mentioned sequence of positions in proper order.Be the forward website preference return CTS of relative position, reply CTS behind the website after relative position leans on.
Mode two: this website confirms according to data flow indication information and above-mentioned sequence of positions whether the data fluxion of self is 0; If do not reply CTS; If not, this website is 0 website deletion with data fluxion in the sequence of positions, obtains new sequence of positions, and this website confirms that the answer of CTS frame is the corresponding order of new sequence of positions in proper order.
Mode three: the RTS frame that access point sends also carries primary website indication information, and this indication information specifically can be the reception mac address information in the mac frame head of RTS frame; The answer order of confirming the CTS frame can adopt following mode:
This website judges it self whether is primary website (primarily STA refers to the STA that the reception mac address information in the mac frame head of RTS frame is identified) according to primary website indication information;
If, confirm that according to the data flow indication information data fluxion of self is not 0, confirm that then the answer of CTS frame is first answer in proper order; If not; Primary website in the sequence of positions is taken out first of placement; Other website is adjusted according to the relative position in above-mentioned sequence of positions, the sequence of positions that must make new advances, this website confirms that the answer of CTS frame is the corresponding order of new sequence of positions in proper order.
According to this mode, first replys CTS primary website, and all the other websites are still replied CTS according to the relative position in MU-MIMO divides into groups in proper order, i.e. the forward preference return CTS of relative position, the back answer CTS after relative position leans on.
Mode four: this website sorts according to each website in the big young pathbreaker MU-MIMO grouping of above-mentioned data fluxion; This website confirms that the answer of CTS frame is the order after the ordering in proper order.When the data fluxion of a plurality of websites equates, confirm the ordering between these a plurality of websites according to above-mentioned sequence of positions.
When adopting this mode four, each website can be according to N in the RTS frame STSThe ascending order of the data fluxion of each website that the territory is indicated or the order after the descending are replied CTS; Have between the website of identical data fluxion, can confirm the order between them according to they relative positions (being above-mentioned sequence of positions) in group.
Present embodiment carries response frame through access point and replys indication information when sending the RTS frame; Make the purpose website can clearly whether reply response frame; And then completion channel booking; Solve in the MU-MIMO transmission access point and can't indicate website whether to reply the problem of response frame, improved data transmission efficiency.
The method of the answer order of the above-mentioned four kinds of definite CTS frames that provide to present embodiment is that example is elaborated so that 1 AP and 7 STA to be arranged in the network below, and 7 STA are expressed as STA-1, STA-2, STA-3, STA-4, STA-5, STA-6, STA-7 respectively; Each MU-MIMO in the embodiment of the invention divides into groups to be made up of 4 STA, and the MU-MIMO of 4 STA of less than divides into groups also to be considered to be made up of 4 STA, and not enough part can be thought has virtual STA to exist; N STSThe data fluxion that puts in order and indicate each STA successively of STA in dividing into groups according to MU-MIMO in the territory.
AP is divided into a plurality of MU-MIMO groupings according to the channel condition information of each STA with above-mentioned 7 STA, and grouping information (being above-mentioned sequence of positions) is notified to corresponding STA.Be described under this network environment through following examples below, how STA confirms the answer order of CTS frame.
Embodiment 1
MU-MIMO in the present embodiment is grouped into: (STA-2, STA-1, STA-3, STA-4), and AP is sequence of positions: STA-2, STA-1, STA-3, STA-4 notify to the STA in this grouping.
Before above-mentioned MU-MIMO was divided into groups to send data, AP at first sent the RTS frame that divides into groups to above-mentioned MU-MIMO, and present embodiment is with this MU-MIMO transmission; STA-1 has N1 data flow; STA-2 has N2 data flow, and STA-3 has N3 data flow, and STA-4 is that example describes by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, nine integers for from 0 to 8.
Under foregoing, the RTS frame that AP sends carries the data flow indication information, for example the data flow indication information is dosed at its N STSIn the territory; Indication information is following: the STA that occupies first position in the group in the grouping is that the data fluxion of STA-2 is N2; The STA that occupies interior second position of group during indication is divided into groups is that the data fluxion of STA-1 is N1; The STA that occupies the 3rd position in the group during indication is divided into groups is that the data fluxion of STA-3 is N3, and the STA that occupies the 4th position in the group during indication is divided into groups is that the data fluxion of STA-4 is N4.
Suppose: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of RTS frame is designated the MAC Address of STA-1 simultaneously.
Each STA operates after receiving above-mentioned RTS frame as follows:
After STA-1 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilizing paid-in grouping information again (is the position order: STA-2, STA-1, STA-3; STA-4), know and lay oneself open to (STA-2, STA-1; STA-3, STA-4) second position in the grouping needs to reply the CTS frame; Because it occupies interior second position of group, and the data fluxion of STA that occupies first position in the group is not 0, thereby needs second to reply the CTS frame.
After STA-2 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) first position in dividing into groups, STA-2 need reply the CTS frame, because it occupies first position in the group, thereby needs first to reply the CTS frame.
After STA-3 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 3rd position in the grouping is according to the inventive method; STA-3 need reply the CTS frame; Because it occupies the 3rd position in the group, and the data fluxion that occupies the STA of preceding two positions in the group is not 0, thereby needs the 3rd to reply the CTS frame.
After STA-4 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 4th position in the grouping is according to the inventive method; STA-4 need reply the CTS frame; Because it occupies the 4th position in the group, and the data fluxion of STA that occupies first three position in the group is not 0, thereby needs the 4th answer CTS frame.
Thereby in the present embodiment, finally reply the CTS frame STA and the order as follows:
That first replys the CTS frame is STA-2;
Second that reply the CTS frame is STA-1;
The 3rd that reply the CTS frame is STA-3;
The 4th that reply the CTS frame is STA-4.
After AP receives above-mentioned CTS frame, confirm the channel booking success, in this divides into groups, transmitting data during the channel booking.
After STA in the present embodiment received the RTS frame, the data fluxion of confirming each STA was not 0, then replied the CTS frame according to the sequence of positions in the grouping at its place, and then accomplished channel booking, had improved data transmission efficiency.
Embodiment 2
MU-MIMO in the present embodiment is grouped into: (STA-2, STA-1, STA-3, STA-4), and AP is sequence of positions: STA-2, STA-1, STA-3, STA-4 notify to the STA in this grouping.
Before above-mentioned MU-MIMO was divided into groups to send data, AP at first sent the RTS frame that divides into groups to above-mentioned MU-MIMO, and present embodiment is with this MU-MIMO transmission; STA-1 has N1 data flow; STA-2 has N2 data flow, and STA-3 has N3 data flow, and STA-4 is that example describes by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, nine integers for from 0 to 8.
Under foregoing, the RTS frame that AP sends carries the data flow indication information, for example the data flow indication information is dosed at its N STSIn the territory; Indication information is following: the STA that occupies first position in the group in the grouping is that data flow-number of STA-2 is N2; The STA that occupies interior second position of group during indication is divided into groups is that the data fluxion of STA-1 is N1; The STA that occupies the 3rd position in the group during indication is divided into groups is that the data fluxion of STA-3 is N3, and the STA that occupies the 4th position in the group during indication is divided into groups is that the data fluxion of STA-4 is N4.
Suppose: N1=0, N2=3, N3=2, N4=0, the reception MAC Address in the mac frame head of RTS frame is designated the MAC Address of STA-1 simultaneously.
Each STA operates after receiving the RTS frame as follows:
After STA-1 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 3; The data fluxion that occupies the STA of interior second position of group is 0; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 0; Utilize paid-in grouping information again, know and lay oneself open to (STA-1, STA-2, STA-3, STA-4) second position in dividing into groups is because of its data fluxion is 0, so do not reply the CTS frame.
After STA-2 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 3; The data fluxion that occupies the STA of interior second position of group is 0; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 0; Utilize paid-in grouping information again, know and lay oneself open to (STA-1, STA-2, STA-3, STA-4) first position in dividing into groups, STA-2 need reply CTS, owing to occupy first position in the group, so first answer of STA-2 CTS.
After STA-3 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 3; The data fluxion that occupies the STA of interior second position of group is 0; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 0; Utilize paid-in grouping information again, know to lay oneself open to (STA-1, STA-2; STA-3; STA-4) in the grouping, and itself occupy the 3rd position in the group, STA-3 need reply the CTS frame; In this MU-MIMO transmission, there are not data owing to occupy the STA-1 of second position, so second of STA-3 replys the CTS frame.
After STA-4 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 3; The data fluxion that occupies the STA of interior second position of group is 0; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 0; Utilize paid-in grouping information again, know and lay oneself open to (STA-1, STA-2, STA-3, STA-4) the 4th position in dividing into groups, because of its data fluxion is 0, STA-4 need not reply the CTS frame.
Thereby in this embodiment, finally reply the CTS frame STA and the order as follows:
That first replys the CTS frame is STA-2;
Second that reply the CTS frame is STA-3.
After AP receives above-mentioned CTS frame, confirm the channel booking success, in this divides into groups, transmitting data during the channel booking.
After STA in the present embodiment received the RTS frame, the data fluxion that defines STA was 0, then adjust the sequence of positions in the grouping at its place after, reply the CTS frame according to new sequence of positions, and then accomplish channel booking, improved data transmission efficiency.
Embodiment 3
MU-MIMO in the present embodiment is grouped into: (STA-2, STA-1, STA-3, STA-4), and AP is sequence of positions: STA-2, STA-1, STA-3, STA-4 notify to the STA in this grouping.
Before above-mentioned MU-MIMO was divided into groups to send data, AP at first sent the RTS frame that divides into groups to above-mentioned MU-MIMO, and present embodiment is with this MU-MIMO transmission; STA-1 has N1 data flow; STA-2 has N2 data flow, and STA-3 has N3 data flow, and STA-4 is that example describes by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, nine integers for from 0 to 8.
Under foregoing, the RTS frame that AP sends carries the data flow indication information, for example the data flow indication information is dosed at its N STSIn the territory; Indication information is following: the STA that occupies first position in the group in the grouping is that the data fluxion of STA-2 is N2; The STA that occupies interior second position of group during indication is divided into groups is that the data fluxion of STA-1 is N1; The STA that occupies the 3rd position in the group during indication is divided into groups is that the data fluxion of STA-3 is N3, and the STA that occupies the 4th position in the group during indication is divided into groups is that the data fluxion of STA-4 is N4.
Suppose: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of RTS frame is designated the MAC Address of STA-1 simultaneously, and the STA-1 of this MAC Address sign is primary website in the present embodiment.
Each STA operates after receiving the RTS frame as follows:
After STA-1 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; The mac address information of the receiver address indication in the mac frame head of parsing RTS frame, the STA of this mac address information sign is STA-1, promptly primary STA is STA-1; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) second position in the grouping needs to reply the CTS frame; Owing to itself be primary STA,, need first to reply the CTS frame though occupy interior second position of group.
After STA-2 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; The mac address information of the receiver address indication in the mac frame head of parsing RTS frame, the STA of this mac address information sign is STA-1, promptly primary STA is STA-1, utilizes paid-in grouping information again; Know and lay oneself open to (STA-2, STA-1, STA-3; STA-4) first position in the grouping, according to the inventive method, STA-2 need reply the CTS frame; Because the data fluxion of primary STA is not 0, need first to reply CTS, so STA-2 wants second to reply the CTS frame.
After STA-3 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; The mac address information of the receiver address indication in the mac frame head of parsing RTS frame, the STA of this mac address information sign is STA-1, promptly primary STA is STA-1; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 3rd position in the grouping is according to the inventive method; STA-3 need reply the CTS frame, because it occupies the 3rd position in the group, and the data fluxion that occupies the STA of preceding two positions in the group is not 0; Simultaneously primary STA also is in before itself, thereby needs the 3rd to reply the CTS frame.
After STA-4 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; The mac address information of the receiver address indication in the mac frame head of parsing RTS frame, the STA of this mac address information sign is STA-1, promptly primary STA is STA-1; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 4th position in the grouping, STA-4 need reply the CTS frame; Because it occupies the 4th position in the group; And the data fluxion that occupies the STA of first three position in the group is not 0, and simultaneously primary STA also is in before itself, thereby needs the 4th to reply the CTS frame.
Thereby in this embodiment, finally reply the CTS frame STA and the order as follows:
That first replys the CTS frame is STA-1;
Second that reply the CTS frame is STA-2;
The 3rd that reply the CTS frame is STA-3;
The 4th that reply the CTS frame is STA-4.
After AP receives above-mentioned CTS frame, confirm the channel booking success, in this divides into groups, transmitting data during the channel booking.
After STA in the present embodiment receives the RTS frame; The data fluxion of confirming each STA is not 0, and has indicated primary website in this RTS frame, then adjusts the order of each website according to the sequence of positions of primary website in grouping; Obtain new sequence of positions; Reply the CTS frame according to new sequence of positions, and then accomplish channel booking, improved data transmission efficiency.
Data fluxion in the foregoing description also can replace with certain indicators, for example: will not be that 0 data fluxion replaces with " Y ", will replace with " N " for 0 data fluxion.Other step is constant.
Embodiment 4
MU-MIMO in the present embodiment is grouped into: (STA-2, STA-1, STA-3, STA-4), and AP is sequence of positions: STA-2, STA-1, STA-3, STA-4 notify to the STA in this grouping.
Before above-mentioned MU-MIMO was divided into groups to send data, AP at first sent the RTS frame that divides into groups to above-mentioned MU-MIMO, and present embodiment is with this MU-MIMO transmission; STA-1 has N1 data flow; STA-2 has N2 data flow, and STA-3 has N3 data flow, and STA-4 is that example describes by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, nine integers for from 0 to 8.
Under foregoing, the RTS frame that AP sends carries the data flow indication information, for example the data flow indication information is dosed at its N STSIn the territory; Indication information is following: the STA that occupies first position in the group in the grouping is that the data fluxion of STA-2 is N2; The STA that occupies interior second position of group during indication is divided into groups is that the data fluxion of STA-1 is N1; The STA that occupies the 3rd position in the group during indication is divided into groups is that the data fluxion of STA-3 is N3, and the STA that occupies the 4th position in the group during indication is divided into groups is that the data fluxion of STA-4 is N4.
Suppose: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of RTS frame is designated the MAC Address of STA-1 simultaneously.
Each STA operates after receiving the RTS frame as follows:
After STA-1 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) second position in dividing into groups needs to reply CTS, because one's own data fluxion N1=3, in group, at most, thereby needs first answer CTS frame.
After STA-2 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) first position in the grouping, STA-2 need reply the CTS frame; Because one's own data fluxion N2=1 is minimum in group, thereby need the 4th to reply the CTS frame.
After STA-3 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is: the data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3; The data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 3rd position in the grouping, STA-3 need reply the CTS frame; Because one's own data fluxion N3=2, many STA have 1 in the own data fluxion of group internal ratio, and the STA identical with own fluxion has 1; Own position in group is more forward than the position of the STA identical with own data fluxion in group, thereby needs second to reply the CTS frame.
After STA-4 receives the RTS frame, detect the N of RTS frame STSThe territory; The information that obtains is; The data fluxion that occupies the STA of first position in the group in the grouping under the MU-MIMO data that this time are about to transmit is 1; The data fluxion that occupies the STA of interior second position of group is 3, and the data fluxion that occupies the STA of the 3rd position in the group is 2, and the data fluxion that occupies the STA of the 4th position in the group is 2; Utilize paid-in grouping information again, know to lay oneself open to (STA-2, STA-1; STA-3, STA-4) the 4th position in the grouping, STA-4 need reply the CTS frame; Because one's own data fluxion N4=2 has 1 at the many STA of data fluxion of group internal ratio oneself, the STA identical with the data fluxion of oneself has 1; After own position in group is more leaned on than the position of the STA identical with own data fluxion in group, thereby need the 3rd to reply the CTS frame.
Thereby in the present embodiment, finally reply the CTS frame STA and the order as follows:
That first replys the CTS frame is STA-1;
Second that reply the CTS frame is STA-3;
The 3rd that reply the CTS frame is STA-4;
The 4th that reply the CTS frame is STA-2.
After AP receives above-mentioned CTS frame, confirm the channel booking success, in this divides into groups, transmitting data during the channel booking.
After STA in the present embodiment received the RTS frame, the data fluxion of confirming each STA was not 0, then confirmed to reply the order of CTS frame according to the size of its data flow in grouping, and then accomplished channel booking, had improved data transmission efficiency.
The embodiment of the invention also provides a kind of access point; This access point comprises: the initial frame sending module is used to send initial frame, wherein; Initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame.
As shown in Figure 2, this access point comprises:
Sequence of positions notification module 22 is used for the MU-MIMO grouping information is notified to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Initial frame sending module 24 comprises:
Order corresponding unit 242 is used for that response frame is replied indication information and indicates each website of MU-MIMO grouping whether to reply response frame successively according to the positional information order;
Transmitting element 244 is used to send initial frame, and the response frame that this initial frame carries in the said sequence corresponding unit 242 is replied indication information.
Preferably, this access point also comprises: the channel booking determination module, be used to receive the response frame that above-mentioned website replys after, confirm with this website between channel booking successfully.
The access point of present embodiment carries the initial frame that response frame is replied indication information through transmission; Solve the website that to indicate in the MU-MIMO grouping and whether replied the problem of response frame; For channel booking successfully provides guarantee, and then can improve the transmission speed of data.
The embodiment of the invention also provides a kind of website, and is as shown in Figure 3, and this website comprises:
Receiver module 32 is used to receive the initial frame from access point, and wherein, initial frame carries response frame and replys indication information, and response frame is replied the website that multi-user's multiple-input and multiple-output MU-MIMO that indication information is used for indicating the website place divides into groups to reply response frame;
Response frame is replied module 34, is used for replying indication information according to response frame and determines whether to reply response frame; If reply response frame.
This website also comprises: the sequence of positions receiver module, be used to receive the MU-MIMO grouping information that access point sends, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Response frame is replied module 34 and is comprised:
Confirm the unit, be used for replying indication information and confirm to reply response frame according to response frame;
The unit is confirmed in answer in proper order, be used for confirming that the unit is confirmed to reply response frame after, reply answer that indication information and sequence of positions information confirms response frame in proper order according to response frame; Wherein, answer refers to the precedence of other website answer response frame in website and the MU-MIMO grouping in proper order;
Reply the unit, be used for confirming the order answer response frame that the unit is definite in proper order according to answer.
Preferably, to confirm that in proper order the unit can comprise one of following in above-mentioned answer:
First confirms subelement, is used for replying indication information according to response frame and confirms that MU-MIMO each website that divides into groups all need reply response frame, and the answer of then confirming response frame be the order of sequence of positions information correspondence in proper order.
Second confirms subelement, is used for confirming according to response frame answer indication information and sequence of positions information whether self replys response frame; If the website deletion with not replying response frame in the sequence of positions information obtains new sequence of positions, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order; If, do not reply response frame.
If the initial frame that receiver module 32 receives also carries primary website indication information; Above-mentioned answer confirms that in proper order unit further comprises:
The 3rd confirms subelement, is used for judging according to primary website indication information whether self is primary website; If, reply indication information according to response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order; If not; Primary website in the sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in the order information of position, the sequence of positions that must make new advances, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order.
If the response frame in the initial frame that receiver module 32 receives is replied the data fluxion that indication information is each website during MU-MIMO divides into groups; Above-mentioned answer confirms that in proper order unit further comprises:
The 4th confirms subelement, is used for each website that the big young pathbreaker MU-MIMO according to the data fluxion divides into groups and sorts, and confirms that the answer of response frame is the order after the ordering in proper order.
Preferably, the 4th confirms that subelement comprises: the ordering subelement is used for when the data fluxion of a plurality of websites equates, confirming the ordering between a plurality of websites according to sequence of positions information.
The website of present embodiment is replied response frame through the indication of replying in the indication information according to response frame, has accomplished channel booking with access point, has solved the problem that can't determine whether to reply response frame in the MU-MIMO transmission.And then improved the speed of transmission data.
As shown in Figure 4, the embodiment of the invention also provides a kind of channel booking system, is used for the MU-MIMO transmission, and this system comprises: access point 20 and website 30.
This access point 20 can adopt the mode in the foregoing description to realize with website 30, for example:
Access point 20 comprises: the initial frame sending module, be used to send initial frame, and wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used for indicating multi-user's multiple-input and multiple-output MU-MIMO to divide into groups to reply the website of response frame; The channel booking determination module, be used to receive the response frame that website replys after, confirm and website between the channel booking success;
Website 30 comprises: receiver module is used to receive the initial frame from access point 20; Response frame is replied module, is used for replying indication information according to response frame and determines whether to reply response frame; If reply response frame.
Preferably, access point 20 also comprises: the sequence of positions notification module, be used for the MU-MIMO grouping information is notified to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
The initial frame sending module comprises: the order corresponding unit is used for that response frame is replied indication information and indicates each website of MU-MIMO grouping whether to reply response frame successively according to sequence of positions information.
Website 30 also comprises: the sequence of positions receiver module is used to receive the MU-MIMO grouping information that access point sends;
Response frame is replied module and is comprised: confirm the unit, be used for replying indication information according to response frame and confirm to reply response frame; The unit is confirmed in answer in proper order, be used for confirming that the unit is confirmed to reply response frame after, reply answer that indication information and sequence of positions information confirms response frame in proper order according to response frame; Wherein, answer refers to the precedence of other website answer response frame in website and the MU-MIMO grouping in proper order; Reply the unit, be used for confirming the order answer response frame that the unit is definite in proper order according to answer;
Answer confirms that in proper order the unit comprises:
First confirms subelement, is used for replying indication information according to response frame and confirms that MU-MIMO each website that divides into groups all need reply response frame, and the answer of then confirming response frame be the order of sequence of positions information correspondence in proper order.
Answer confirms that in proper order the unit comprises:
Second confirms subelement, is used for confirming according to response frame answer indication information and sequence of positions information whether self replys response frame; If the website deletion with not replying response frame in the sequence of positions information obtains new sequence of positions, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order; If, do not reply response frame.
When the initial frame that sends when the initial frame sending module also carries primary website indication information; Answer confirms that in proper order the unit comprises:
The 3rd confirms subelement, is used for judging according to primary website indication information whether self is primary website; If, reply indication information according to response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order; If not; Primary website in the sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in the order information of position, the sequence of positions that must make new advances, website confirms that the answer of response frame is the corresponding order of new sequence of positions in proper order.
When the answer of the response frame in the initial frame that the initial frame sending module sends indication information is the data fluxion of each website during MU-MIMO divides into groups; Answer confirms that in proper order the unit comprises:
The 4th confirms subelement, is used for each website that the big young pathbreaker MU-MIMO according to the data fluxion divides into groups and sorts, and confirms that the answer of response frame is the order after the ordering in proper order.
The 4th confirms that subelement comprises: the ordering subelement is used for when the data fluxion of a plurality of websites equates, confirming the ordering between a plurality of websites according to sequence of positions information.
Describe in the IEEE802.11 system, to be embodied as example below, wherein, the RTS frame in the initial frame using system, the CTS frame in the response frame using system, response frame is replied the data flow indication information in the multiplexing RTS frame of indication information.Those skilled in the art also can realize based on the implementation under this system in other systems.
Embodiment 5
Fig. 5 shows the structured flowchart according to the channel booking system in the MU-MIMO transmission of the embodiment of the invention; This system comprises: access point 20 and a plurality of websites that link to each other with access point 20; A plurality of websites in the present embodiment are website 30, website 32 and website 34, and these three websites belong to same MU-MIMO grouping; Have identical functions, present embodiment is that example describes with website 30 only.
Access point 20 is used to send the RTS frame, and after receiving the CTS frame that the website 30 of MU-MIMO in dividing into groups reply, confirm with this website between channel booking successfully; Wherein, the RTS frame carries the data flow indication information;
Website 30, be used to receive the RTS frame after, determine whether to reply the CTS frame according to the data flow indication information, if reply the CTS frame; After confirming to reply the CTS frame, can also confirm the answer order according to the data flow indication information.Wherein, answer refers to the precedence of other website answer CTS frame in website 30 and the MU-MIMO grouping in proper order.
Present embodiment carries the data flow indication information through access point 20 when sending the RTS frame; Make website 30 can confirm the answer order of CTS according to this information; And then the completion channel booking, solved the problem of channel booking failure in the MU-MIMO transmission, improved data transmission efficiency.
As shown in Figure 6, access point 20 comprises: location information notification module 202, be used for the MU-MIMO grouping information is notified to each website, and wherein, grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping; Data flow indication information in the RTS frame that access point sends is the data fluxion of indicating each website in the MU-MIMO grouping according to this sequence of positions information successively.
Website 30 comprises: answer order determination module 302 is used for according to the data fluxion of each website of MU-MIMO grouping and the answer order that sequence of positions information is confirmed the CTS frame.
When the answer order of CTS frame is confirmed in website 30 concrete realizations, can be accomplished in several ways, for example:
Mode one: website 30 comprises: the first data fluxion determination module is used for confirming that according to the data flow indication information data flow number average of each website of MU-MIMO grouping is not 0; First answer order determination module is used for confirming that the answer of CTS frame is the corresponding order of above-mentioned sequence of positions information in proper order.
Mode two: website 30 comprises: the second data fluxion determination module is used for confirming according to data flow indication information and above-mentioned sequence of positions information whether the data fluxion of self is 0; Second answer order determination module is if be used for result that the second data fluxion determination module confirms for being not reply CTS; If for not, be 0 website deletion with data fluxion in the above-mentioned sequence of positions information, obtain new sequence of positions, confirm that the answer of CTS frame is the corresponding order of new sequence of positions in proper order.
Mode three: the RTS frame that access point 20 sends also carries primary website indication information, for example: the reception MAC Address sign in the mac frame head of RTS frame; Website 30 comprises: primary website judge module is used for judging according to primary website indication information whether self is primary website; The 3rd answer order determination module if the judged result that is used for primary website judge module confirms that according to the data flow indication information data fluxion of self is not 0 for being, confirms that then the answer of CTS frame is first answer in proper order; If not; Primary website in the above-mentioned sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in above-mentioned sequence of positions information, and the sequence of positions that must make new advances confirms that the answer of CTS frame is the corresponding order of new sequence of positions in proper order.
Mode four: website 30 comprises: order module is used for each website that the big young pathbreaker MU-MIMO according to the data fluxion divides into groups and sorts; The 4th answer order determination module is used for confirming that the answer of CTS frame is the order after the order module ordering in proper order.
The data fluxion of considering different websites might equate, so under this mode, order module also comprises: sequencing unit is used for when the data fluxion of a plurality of websites equates, confirming the ordering between a plurality of websites according to above-mentioned sequence of positions information.
The access point of the embodiment of the invention just can make a plurality of websites in the MU-MIMO grouping confirm the answer order of CTS through sending a RTS, accomplishes the channel booking operation in proper order according to this, has improved the efficiency of transmission and the success rate of data.
From above description; Can find out; The present invention has realized following technique effect: above embodiment divides into groups through a plurality of websites being carried out MU-MIMO, in dividing into groups, confirms the order of each website answer CTS, can accomplish the channel booking of this grouping as early as possible; Prevented the interference of hiding website, guaranteed that access point successfully transmits data.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (31)

1. an initial frame sending method is characterized in that, is used for multi-user's multiple-input and multiple-output MU-MIMO transmission, comprising:
Access point sends initial frame, and wherein, said initial frame carries response frame and replys indication information, and said response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame.
2. method according to claim 1 is characterized in that,
Said access point sends before the initial frame, and said method also comprises: said access point notifies the MU-MIMO grouping information to each website, and wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said response frame reply indication information be according to said sequence of positions information indicate successively said MU-MIMO divide into groups in each website whether reply the information of response frame.
3. method according to claim 1 is characterized in that, said initial frame also carries primary website indication information.
4. method according to claim 1 is characterized in that, it is the data fluxion of each website that said response frame is replied indication information.
5. according to each described method of claim 1-4, it is characterized in that said access point sends after the initial frame, said method also comprises:
After said access point receives the response frame that said website replys, confirm with said website between channel booking successfully.
6. a response frame answering method is characterized in that, is used for multi-user's multiple-input and multiple-output MU-MIMO transmission, comprising:
Website during MU-MIMO divides into groups receives the initial frame from access point, and wherein, said initial frame carries response frame and replys indication information, and said response frame is replied indication information and is used for indicating said MU-MIMO to divide into groups to reply the website of response frame;
Said website is replied indication information according to said response frame and is determined whether to reply said response frame; If said website is replied said response frame, make said access point confirm with said website between channel booking successfully.
7. method according to claim 6 is characterized in that,
Website during said MU-MIMO divides into groups receives before the initial frame from access point; Said method also comprises: the website during said MU-MIMO divides into groups receives the MU-MIMO grouping information from access point; Wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said website is replied said response frame and comprised: said website is confirmed the answer order of response frame according to said response frame answer indication information and said sequence of positions information; Wherein, said response frame reply indication information be according to said sequence of positions information indicate successively said MU-MIMO divide into groups in each website whether reply the information of response frame;
Said answer refers to the precedence of other website answer response frame in said website and the said MU-MIMO grouping in proper order; Said website is replied said response frame according to the order of confirming.
8. method according to claim 7 is characterized in that, said website replys indication information according to said response frame and said sequence of positions information confirms that the answer of response frame comprises in proper order:
Said website is replied indication information according to said response frame and is confirmed that each website all need be replied response frame in the said MU-MIMO grouping;
Said website confirms that the answer of response frame is the corresponding order of said sequence of positions information in proper order.
9. method according to claim 7 is characterized in that, said website replys indication information according to said response frame and said sequence of positions information confirms that the answer of response frame comprises in proper order:
Said website replys indication information according to said response frame and said sequence of positions information confirms whether self replys response frame;
If said website obtains new sequence of positions with the website deletion that need not reply response frame in the said sequence of positions information, said website confirms that the answer of response frame is the said new corresponding order of sequence of positions in proper order;
If, do not reply response frame.
10. method according to claim 7 is characterized in that, the initial frame that said website receives also carries primary website indication information;
Said website replys indication information according to said response frame and said sequence of positions information confirms that the answer of response frame comprises in proper order:
Said website judges according to said primary website indication information whether self is primary website;
If, reply indication information according to said response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order;
If not; Primary website in the said sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in said sequence of positions information; The sequence of positions that must make new advances, said website confirm that the answer of response frame is the said new corresponding order of sequence of positions in proper order.
11. method according to claim 7 is characterized in that, it is the data fluxion of each website that said response frame is replied indication information;
Said website replys indication information according to said response frame and said sequence of positions information confirms that the answer of response frame comprises in proper order: each website during said website divides into groups according to the said MU-MIMO of the big young pathbreaker of said data fluxion sorts; Said website confirms that the answer of response frame is the order after the said ordering in proper order.
12. method according to claim 11 is characterized in that, each website during said website divides into groups according to the said MU-MIMO of the big young pathbreaker of said data fluxion sorts and comprises:
When the data fluxion of a plurality of websites equates, confirm the ordering between said a plurality of website according to said sequence of positions information.
13. a channel booking method is characterized in that, is used for multi-user's multiple-input and multiple-output MU-MIMO transmission, said method comprises:
Access point sends initial frame, and wherein, said initial frame carries response frame and replys indication information, and said response frame is replied indication information and is used for indicating MU-MIMO to divide into groups to reply the website of response frame;
After website during said MU-MIMO divides into groups receives said initial frame, reply indication information according to said response frame and determine whether to reply said response frame; If said website is replied said response frame;
After said access point receives the response frame that said website replys, confirm with said website between channel booking successfully.
14. method according to claim 13 is characterized in that,
Said access point sends before the initial frame, and said method also comprises: said access point notifies the MU-MIMO grouping information to each website, and wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said response frame reply indication information be according to said sequence of positions information indicate successively said MU-MIMO divide into groups in each website whether reply the information of response frame;
Said website is replied said response frame and comprised: said website is confirmed the answer order of response frame according to said response frame answer indication information and said sequence of positions information; Wherein, said answer refers to the precedence of other website answer response frame in said website and the said MU-MIMO grouping in proper order; Said website is replied said response frame according to the order of confirming.
15. an access point is characterized in that, comprising:
The initial frame sending module is used to send initial frame, and wherein, said initial frame carries response frame and replys indication information, and said response frame is replied indication information and is used for indicating multi-user's multiple-input and multiple-output MU-MIMO to divide into groups to reply the website of response frame.
16. access point according to claim 15; It is characterized in that said access point also comprises: the sequence of positions notification module is used for the MU-MIMO grouping information is notified to each website; Wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said initial frame sending module comprises:
The order corresponding unit is used for that said response frame is replied indication information and indicates said each website of MU-MIMO grouping whether to reply response frame successively according to said sequence of positions information.
17., it is characterized in that said access point also comprises according to claim 15 or 16 described access points: the channel booking determination module, be used to receive the response frame that said website replys after, confirm with said website between channel booking successfully.
18. a website is characterized in that, comprising:
Receiver module; Be used to receive initial frame from access point; Wherein, said initial frame carries response frame and replys indication information, and said response frame is replied the website that multi-user's multiple-input and multiple-output MU-MIMO that indication information is used for indicating said website place divides into groups to reply response frame;
Response frame is replied module, is used for replying indication information according to said response frame and determines whether to reply said response frame; If reply said response frame.
19. website according to claim 18 is characterized in that, said website also comprises:
The sequence of positions receiver module is used to receive the MU-MIMO grouping information that said access point sends, and wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said response frame is replied module and is comprised:
Confirm the unit, be used for replying indication information and confirm to reply said response frame according to said response frame;
The unit is confirmed in answer in proper order, after being used for said definite unit and confirming to reply said response frame, replys the answer order that indication information and said sequence of positions information are confirmed response frame according to said response frame; Wherein, said answer refers to the precedence of other website answer response frame in said website and the said MU-MIMO grouping in proper order;
Reply the unit, be used for replying said response frame according to the order that the definite in proper order unit of said answer is confirmed.
20. website according to claim 19 is characterized in that, said answer confirms that in proper order the unit comprises:
First confirms subelement, is used for replying indication information according to said response frame and confirms that said MU-MIMO each website that divides into groups all need reply response frame, and the answer of then confirming response frame be the order of said sequence of positions information correspondence in proper order.
21. website according to claim 19 is characterized in that, said answer confirms that in proper order the unit comprises:
Second confirms subelement, is used for confirming according to said response frame answer indication information and said sequence of positions information whether self replys response frame; If the website deletion with not replying response frame in the said sequence of positions information obtains new sequence of positions, said website confirms that the answer of response frame is the said new corresponding order of sequence of positions in proper order; If, do not reply response frame.
22. website according to claim 19 is characterized in that, the initial frame that said receiver module receives also carries primary website indication information;
Said answer confirms that in proper order the unit comprises:
The 3rd confirms subelement, is used for judging according to said primary website indication information whether self is primary website; If, reply indication information according to said response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order; If not; Primary website in the said sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in said sequence of positions information; The sequence of positions that must make new advances, said website confirm that the answer of response frame is the said new corresponding order of sequence of positions in proper order.
23. website according to claim 19 is characterized in that, the response frame in the initial frame that said receiver module receives is replied the data fluxion that indication information is each website during said MU-MIMO divides into groups;
Said answer confirms that in proper order the unit comprises:
The 4th confirms subelement, is used for sorting according to each website that the said MU-MIMO of the big young pathbreaker of said data fluxion divides into groups, and confirms that the answer of response frame is the order after the said ordering in proper order.
24. website according to claim 20 is characterized in that, the said the 4th confirms that subelement comprises:
The ordering subelement is used for when the data fluxion of a plurality of websites equates, confirming the ordering between said a plurality of website according to said sequence of positions information.
25. a channel booking system is characterized in that, comprising: access point and website;
Said access point comprises: the initial frame sending module; Be used to send initial frame; Wherein, said initial frame carries response frame and replys indication information, and said response frame is replied indication information and is used for indicating multi-user's multiple-input and multiple-output MU-MIMO to divide into groups to reply the website of response frame; The channel booking determination module, be used to receive the response frame that said website replys after, confirm with said website between channel booking successfully;
Said website comprises: receiver module is used to receive the initial frame from said access point; Response frame is replied module, is used for replying indication information according to said response frame and determines whether to reply said response frame; If reply said response frame.
26. system according to claim 25; It is characterized in that said access point also comprises: the sequence of positions notification module is used for the MU-MIMO grouping information is notified to each website; Wherein, said grouping information comprises the sequence of positions information of contained website in the MU-MIMO grouping;
Said initial frame sending module comprises:
The order corresponding unit is used for that said response frame is replied indication information and indicates said each website of MU-MIMO grouping whether to reply response frame successively according to said sequence of positions information;
Said website also comprises: the sequence of positions receiver module is used to receive the MU-MIMO grouping information that said access point sends;
Said response frame is replied module and is comprised: confirm the unit, be used for replying indication information according to said response frame and confirm to reply said response frame; The unit is confirmed in answer in proper order, after being used for said definite unit and confirming to reply said response frame, replys the answer order that indication information and said sequence of positions information are confirmed response frame according to said response frame; Wherein, said answer refers to the precedence of other website answer response frame in said website and the said MU-MIMO grouping in proper order; Reply the unit, be used for replying said response frame according to the order that the definite in proper order unit of said answer is confirmed.
27. system according to claim 26 is characterized in that, said answer confirms that in proper order the unit comprises:
First confirms subelement, is used for replying indication information according to said response frame and confirms that said MU-MIMO each website that divides into groups all need reply response frame, and the answer of then confirming response frame be the order of said sequence of positions information correspondence in proper order.
28. system according to claim 26 is characterized in that, said answer confirms that in proper order the unit comprises:
Second confirms subelement, is used for confirming according to said response frame answer indication information and said sequence of positions information whether self replys response frame; If the website deletion with not replying response frame in the said sequence of positions information obtains new sequence of positions, said website confirms that the answer of response frame is the said new corresponding order of sequence of positions in proper order; If, do not reply response frame.
29. system according to claim 26 is characterized in that, the initial frame that said initial frame sending module sends also carries primary website indication information;
Said answer confirms that in proper order the unit comprises:
The 3rd confirms subelement, is used for judging according to said primary website indication information whether self is primary website; If, reply indication information according to said response frame and confirm self needs answer response frame, confirm that then the answer of response frame is first answer in proper order; If not; Primary website in the said sequence of positions information is taken out first of placement; Other website is adjusted according to the relative position in said sequence of positions information; The sequence of positions that must make new advances, said website confirm that the answer of response frame is the said new corresponding order of sequence of positions in proper order.
30. system according to claim 26 is characterized in that, the response frame in the initial frame that said initial frame sending module sends is replied the data fluxion that indication information is each website during said MU-MIMO divides into groups;
Said answer confirms that in proper order the unit comprises:
The 4th confirms subelement, is used for sorting according to each website that the said MU-MIMO of the big young pathbreaker of said data fluxion divides into groups, and confirms that the answer of response frame is the order after the said ordering in proper order.
31. system according to claim 30 is characterized in that, the said the 4th confirms that subelement comprises:
The ordering subelement is used for when the data fluxion of a plurality of websites equates, confirming the ordering between said a plurality of website according to said sequence of positions information.
CN201010280582.5A 2010-09-10 2010-09-10 Initial frame transmission, response frame reply, channel booking method, Apparatus and system Expired - Fee Related CN102404082B (en)

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