CN102404082B - Initial frame transmission, response frame reply, channel booking method, Apparatus and system - Google Patents

Initial frame transmission, response frame reply, channel booking method, Apparatus and system Download PDF

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Publication number
CN102404082B
CN102404082B CN201010280582.5A CN201010280582A CN102404082B CN 102404082 B CN102404082 B CN 102404082B CN 201010280582 A CN201010280582 A CN 201010280582A CN 102404082 B CN102404082 B CN 102404082B
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China
Prior art keywords
website
response frame
reply
information
sequence
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CN102404082A (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 the transmission of a kind of initial frame, response frame reply, channel booking method, Apparatus and system, in MU-MIMO transmission.Wherein, the method comprises: access point sends initial frame, and wherein, this initial frame carries response frame and replys indication information, and this response frame is replied indication information and is used to indicate the website of replying response frame in MU-MIMO grouping.According to the present invention, solve the problem that each website in MU-MIMO transmission cannot determine whether reply response frame, by the response frame of station replies, access point can determine that whether channel booking is successful, and then can improve the efficiency of transmission of data.

Description

Initial frame transmission, response frame reply, channel booking method, Apparatus and system
Technical field
The present invention relates to the communications field, in particular to a kind of initial frame transmission, response frame reply, channel booking method, Apparatus and system, in multi-user's multiple-input and multiple-output MU-MIMO transmission.
Background technology
WLAN (WirelessLocalAreaNetworks, WLAN) is that the employing wireless communication technology is interconnected by computer equipment, forms the network system that can communicate mutually and realize resource-sharing.The feature of WLAN (wireless local area network) essence does not re-use telecommunication cable to be coupled together by computer and network, but wirelessly connect, thus make the movement of the structure of network and terminal more flexible.IEEE802.11 is one of mainstream technology of current WLAN (wireless local area network), and this agreement mainly specifies that physical layer (PHY) and media interviews control (MediaAccessControl, MAC) layer specification.
Along with the development of mobile communication technology and people are to the raising of wireless network demand, physical layer specification is towards the more and more higher direction development of speed, successively experienced by 802.11 to 802.11b and arrive 802.11a/g again, then 802.11n, finally arrive the development course of 802.11ac.Actual physical technique also develops into OFDM (OrthogonalFrequencyDivisionMultiplex from direct sequence spread spectrum skill, OFDM) technology, and in IEEE802.11n, introduce multi-antenna technology, in IEEE802.11ac, introduce large bandwidth and multi-user's multiple-input and multiple-output (MU-MIMO) technology.
In 802.11 current systems, before carrying out long data block transmission, RTS (RequestToSend will be passed through, request sends)/CTS (ClearToSend, allowing to send) mechanism carries out channel booking, to prevent multiple Source Site simultaneously to object station transmission data, causes point of destination point to occur receiving data collision, cause loss of data, the multiple Source Sites under this scene hide website each other.Under this mechanism RTS frame mac frame head in the instruction of TA territory launch the MAC Address of website, the MAC Address of RA territory instruction receiving station, CTS is replied after point of destination point receives RTS, in the mac frame head of CTS frame, RA territory comprises the MAC Address of the website sending RTS frame, after the website sending RTS frame receives the CTS comprising MAC Address own, namely think that receiving-transmitting chain is successfully established, carry out transfer of data subsequently.In addition, Duration (duration) territory is all comprised in the mac frame head of RTS frame and CTS frame, be used to refer to the time of transfer of data busy channel, after the website not participating in receiving and dispatching receives RTS frame or CTS frame, can not channel be seized according in the time period of Duration territory instruction, thus avoid the interference to transceiver station.Adopt RTS/CTS mechanism can determine that between transceiver station, link is unimpeded, and solve the hidden terminal problem around website to a certain extent.
After introduce MU-MIMO in 802.11ac system, Source Site and multiple object website functions channel, and based on current RTS/CTS mechanism, the mac frame head of RTS frame only comprises the MAC Address of an object website, the MAC Address of other websites cannot be carried, if there is the hiding website of Source Site around these websites, the reception data collision problem that these hiding websites cause so just cannot be solved.
As shown in the above, when adopting the access point in the system of MU-MIMO to transmit long data block to the multiple websites under a MU-MIMO grouping simultaneously, need to carry out channel booking, and the mac frame head of RTS frame only comprises the MAC Address of an object website, multiple websites under this MU-MIMO divides into groups are because determining whether to need to reply CTS frame, cause channel booking failure, and then have impact on the efficiency of transmission of data.
Summary of the invention
Main purpose of the present invention is to provide the transmission of a kind of initial frame, response frame reply, channel booking method, Apparatus and system, in MU-MIMO transmission, cannot determine whether to reply the problem of response frame with the website solved in above-mentioned MU-MIMO grouping.
According to an aspect of the present invention, provide a kind of initial frame sending method, for in MU-MIMO transmission, the 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 to indicate the website of replying response frame in MU-MIMO grouping.
According to another aspect of the present invention, provide a kind of response frame answering method, for in MU-MIMO transmission, the method comprises: the website in MU-MIMO grouping 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 to indicate the website of replying response frame in MU-MIMO grouping; Website is replied indication information according to response frame and is determined whether to reply described response frame; If so, response frame described in this station replies, above-mentioned access point is determined and between this website channel booking success.
Present invention also offers a kind of channel booking method, for in MU-MIMO transmission, the 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 to indicate the website of replying response frame in MU-MIMO grouping; After website in MU-MIMO grouping receives initial frame, reply indication information according to response frame and determine whether to reply response frame; If so, station replies response frame; After access point receives the response frame of station replies, determine and between website channel booking success.
According to a further aspect in the invention, provide a kind of access point, comprise: initial frame sending module, for sending initial frame, wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used to indicate during multi-user's multiple-input and multiple-output MU-MIMO divides into groups the website of replying response frame.
According to another aspect of the invention, provide a kind of website, comprise: receiver module, for receiving 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 to indicate the website of replying response frame in multi-user's multiple-input and multiple-output MU-MIMO grouping at this website place; Response frame replys module, determines whether to reply described response frame for replying indication information according to above-mentioned response frame; If so, this response frame is replied.
In accordance with a further aspect of the present invention, provide a kind of channel booking system, comprising: above-mentioned access point and website.Namely access point comprises: initial frame sending module, and for sending initial frame, wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used to indicate during multi-user's multiple-input and multiple-output MU-MIMO divides into groups the website of replying response frame; Channel booking determination module, for receive station replies response frame after, determine and channel booking success between website; Website comprises: receiver module, for receiving the initial frame from access point; Response frame replys module, determines whether to reply response frame for replying indication information according to response frame; If so, response frame is replied.
Pass through the present invention, adopt access point to carry response frame when sending initial frame and reply indication information, object website is enable to determine whether to reply response frame according to this information, and then complete channel booking, solve access point in MU-MIMO transmission and the problem indicated the need of reply response frame is not provided, and enable MU-MIMO reply indication information reply response frame according to response frame, complete channel booking, improve data transmission efficiency.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation 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 present invention;
Fig. 2 is the structured flowchart of the access point according to the embodiment of the present invention;
Fig. 3 is the structured flowchart of the website according to the embodiment of the present invention;
Fig. 4 is the structured flowchart of the channel booking system according to the embodiment of the present invention;
Fig. 5 is the structured flowchart according to the channel booking system in the MU-MIMO transmission of the embodiment of the present 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 present invention 5.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The embodiment of the present invention considers the transmission means for one-to-many or multi-to-multi in MU-MIMO transmission, access point (AP, AccessPoint) to multiple object website (STA, when station) transmitting data, in order to ensure that the data transmitted can successfully be received by object website, before transmitting the data, AP and object website realize channel booking by initial frame and response frame, to make other equipment can not seize this channel during its reservation uses this channel, ensure that the channel between this AP and object website is unimpeded.Based on this, embodiments provide the transmission of a kind of initial frame, response frame reply, channel booking method, device and system, wherein this device is access point and website, in 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 to indicate the website of replying response frame in MU-MIMO grouping.
Preferably, before access point sends initial frame, the method also comprises: MU-MIMO grouping information is informed to each website by access point, and wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; Correspondingly, response frame replys indication information is the information that in indicating MU-MIMO to divide into groups successively according to this sequence of positions information, whether each website replys response frame.
Preferably, initial frame also carries primary website indication information, the MAC Address of such as website.When specific implementation, response frame replys the data fluxion that indication information can be each website.
After access point receives the response frame of station replies, determine and between this website channel booking success.
Above-mentioned response frame answering method, in MU-MIMO transmission, the method comprises:
1) website in MU-MIMO grouping 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 to indicate the website of replying response frame in MU-MIMO grouping;
2) this website is replied indication information according to response frame and is determined whether reply response frame; If so, station replies response frame, access point is determined and between website channel booking success.Otherwise will not response frame be replied.
Before website in MU-MIMO grouping receives the initial frame from access point, the method also comprises: the website in MU-MIMO grouping receives the MU-MIMO grouping information from access point, wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; Correspondingly, this station replies response frame comprises: this website replys the reply order of indication information and sequence of positions information determination response frame according to response frame; Wherein, response frame replys indication information is the information that in indicating MU-MIMO to divide into groups successively according to sequence of positions information, whether each website replys response frame; Reply sequentially refer to website and MU-MIMO divide into groups in the precedence of other station replies response frame; This website replys response frame according to the order determined.
The reply order that this website replys indication information and sequence of positions information determination response frame according to response frame comprises following various ways, can select for a post kind of a mode when realizing.
Mode one: website is replied indication information according to response frame and determined that in MU-MIMO grouping, each website all needs to reply response frame; The reply order of website determination response frame is order corresponding to sequence of positions information.
Mode two: website replys indication information according to response frame and sequence of positions information determines whether self replys response frame; If so, website will not need the website of replying response frame to delete in sequence of positions information, obtain new sequence of positions, and the reply of website determination response frame order is order corresponding to new sequence of positions; If not, response frame is not replied.
Mode three: when the initial frame that website receives also carries primary website indication information, the reply order that website replys indication information and sequence of positions information determination response frame according to response frame comprises: according to primary website indication information, website judges whether self is primary website; If so, reply indication information according to response frame and determine self to need to reply response frame, then determine that the reply order of response frame is first reply; If not, primary website in sequence of positions information is taken out placement first, adjusted according to the relative position in the order information of position by other website, the sequence of positions that must make new advances, the reply of website determination response frame order is order corresponding to new sequence of positions.
Mode four: when response frame reply indication information is the data fluxion of each website, the reply order that website replys indication information and sequence of positions information determination response frame according to response frame comprises: website sorts according to each website in the large young pathbreaker MU-MIMO grouping of data fluxion; The reply order of website determination response frame is the order after sequence.
When there being the data fluxion of multiple website equal, the sequence that website can be determined between multiple website according to sequence of positions information.
The embodiment of the present invention additionally provides a kind of channel booking method, and in MU-MIMO transmission, the 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 to indicate the website of replying response frame in MU-MIMO grouping;
2), after the website in MU-MIMO grouping receives initial frame, reply indication information according to response frame and determine whether to reply response frame; If so, station replies response frame;
3) after this access point receives the response frame of station replies, determine and between website channel booking success.
Before access point sends initial frame, method also comprises: MU-MIMO grouping information is informed to each website by access point, and wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; Correspondingly, response frame replys indication information is the information that in indicating MU-MIMO to divide into groups successively according to sequence of positions information, whether each website replys response frame;
Above-mentioned station replies response frame comprises: website replys the reply order of indication information and sequence of positions information determination response frame according to response frame; Wherein, reply sequentially refer to website and MU-MIMO divide into groups in the precedence of other station replies response frame; Website replys response frame according to the order determined.
Be described to be embodied as example in IEEE802.11 system below, wherein, the RTS frame in initial frame use system, the CTS frame in response frame use system, response frame replys the data flow indication information in the multiplexing RTS frame of indication information.Those skilled in the art, based on the implementation under this system, also can realize 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 present invention, and the method comprises the following steps:
Step S102, access point sends RTS frame, and wherein, this RTS frame carries response frame and replys indication information.
Wherein, response frame is replied indication information and is used to indicate the website of replying response frame in MU-MIMO grouping, and the response frame indication information of the present embodiment is multiplexing in data flow indication information; Data flow indication information can dose the N at RTS frame sTSin territory;
After website in step S104, MU-MIMO grouping receives above-mentioned RTS frame, determine whether to reply CTS frame according to above-mentioned data flow indication information;
Step S106, this website replys CTS frame after determining to reply CTS frame;
After this website determines to reply CTS frame, reply order can be determined according to data flow indication information.Wherein, reply sequentially refer to this website and MU-MIMO divide into groups in the precedence of other station replies CTS frame;
According to the combination of one or more indication informations in the group character information in RTS frame, receiver address RA territory indication information and data flow indication information territory etc., each website can determine which the concrete MU-MIMO that this RTS frame is corresponding is grouped into, specific implementation, can realize with reference to correlation technique, such as: each MU-MIMO grouping has a packet number, each MU-MIMO grouping is one-to-one relationship with packet number, and the MU-MIMO corresponding to RTS frame divides into groups to utilize the packet number of group character information in RTS frame to determine.
Step S108, after access point receives above-mentioned CTS frame, determine and between above-mentioned website channel booking success.
May there is a lot of website in real network, these websites can be divided into multiple MU-MIMO according to the channel condition information of each website and divide into groups by access point, and the website number in each MU-MIMO grouping is N, N is variable, can set as required.For the grouping that deficiency is N number of, can dose with virtual site.Access point sorts to the website in each grouping according to the position of N number of website, the sequence of positions of each website under obtaining this grouping.
Preferably, before above-mentioned access point sends RTS frame, said method also comprises: MU-MIMO grouping information is informed to each website by access point, and wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; Correspondingly, above-mentioned response frame indication information is the information that in indicating this MU-MIMO to divide into groups successively according to sequence of positions information, whether each website replys response frame.This information can use following two kinds of representations, and one represents by data fluxion, when the data flow that website is corresponding is not 0, then illustrate that this website needs to reply response frame, namely the CTS frame in the present embodiment, when the data flow that website is corresponding is 0, then illustrates that this website does not need to reply response frame; Another kind uses specific character representation, such as represent with " 0 " (or " N ") and do not need to reply response frame, represent with " 1 " (or " Y ") and need to reply response frame, this information, when sending initial frame, is informed each website in the mode corresponding with site location order by access point.
Such as: have 4 websites in current MU-MIMO grouping, be 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 data fluxion corresponding to STA-1, STA-2, STA-3, STA-4 is N1, N2, N3, N4; Then data flow indication information can be: N3, N1, N2, N4; Because each website knows that the sequence of positions of each website is STA-3, STA-1, STA-2, STA-4 under this grouping; So according to the corresponding relation of data flow indication information and sequence of positions, after each website receives RTS frame, all can determine STA-1, the data fluxion that STA-2, STA-3, STA-4 are corresponding is N1, N2, N3, N4.
If access point requires that the website of replying CTS is one or more, then at the N of RTS frame sTSrelevant position in territory indicates the data fluxion of this STA of this MU-MIMO transmission non-vanishing.
Preferably, the reply order of the determination CTS frame in step S104 comprises: above-mentioned website determines the reply order of CTS frame according to the data fluxion of each website in MU-MIMO grouping and above-mentioned sequence of positions.Specifically determine that mode can be any one mode following:
Mode one: according to data flow indication information, this website determines that the data fluxion of each website in MU-MIMO grouping is not all 0; This website determines that the reply order of CTS frame is order corresponding to above-mentioned sequence of positions.Namely the website preference return CTS that relative position is forward, replys CTS after relative position website rearward.
Mode two: according to data flow indication information and above-mentioned sequence of positions, this website determines whether the data fluxion of self is 0; If so, CTS is not replied; If not, this website by data fluxion in sequence of positions be 0 website delete, obtain new sequence of positions, this website determines that the reply order of CTS frame is for order corresponding to new sequence of positions.
Mode three: the RTS frame that access point sends also carries primary website indication information, and this indication information is specifically as follows the reception mac address information in the mac frame head of RTS frame; Determine that the reply order of CTS frame can in the following way:
According to primary website indication information, this website judges whether self is primary website (primary STA refers to the STA that the reception mac address information in the mac frame head of RTS frame identifies);
If so, determine that according to data flow indication information the data fluxion of self is not 0, then determine that the reply order of CTS frame is first reply; If not, primary website in sequence of positions is taken out placement first, adjusted according to the relative position in above-mentioned sequence of positions by other website, the sequence of positions that must make new advances, this website determines that the reply order of CTS frame is for order corresponding to new sequence of positions.
According to which, primary website first replys CTS, and all the other websites still reply CTS, the preference return CTS that namely relative position is forward, relative position rear reply CTS rearward according to the relative position order in MU-MIMO grouping.
Mode four: this website sorts according to each website in the large young pathbreaker MU-MIMO grouping of above-mentioned data fluxion; This website determines that the reply order of CTS frame is the order after sequence.When there being the data fluxion of multiple website equal, determine the sequence between this multiple website according to above-mentioned sequence of positions.
When adopting which four, each website can according to N in RTS frame sTSorder after the ascending order of the data fluxion of each website indicated by territory or descending, replys CTS; Between the website with identical data fluxion, the order can determining between them according to their relative positions in group (i.e. above-mentioned sequence of positions).
The present embodiment carries response frame by access point and replys indication information when sending RTS frame, enable whether object website is clear and definite replys response frame, and then complete channel booking, solving access point in MU-MIMO transmission cannot indicate website whether to reply the problem of response frame, improves data transmission efficiency.
For the method for above-mentioned four kinds of reply orders determining CTS frame that the present embodiment provides, below there to be 1 AP and 7 STA to be described in detail in network, 7 STA are expressed as STA-1, STA-2, STA-3, STA-4, STA-5, STA-6, STA-7; Each MU-MIMO grouping in the embodiment of the present invention is made up of 4 STA, and be also considered to be made up of 4 STA less than the MU-MIMO grouping of 4 STA, not enough part can be thought has virtual STA to exist; N sTSterritory indicates the data fluxion of each STA successively according to the putting in order of STA in MU-MIMO grouping.
Above-mentioned 7 STA are divided into multiple MU-MIMO to divide into groups according to the channel condition information of each STA by AP, and grouping information (i.e. above-mentioned sequence of positions) is informed to corresponding STA.Under being described in this network environment below by following examples, how STA determines the reply 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 by sequence of positions: STA-2, STA-1, STA-3, STA-4 inform the STA in this grouping.
Before sending data to above-mentioned MU-MIMO grouping, first AP sends the RTS frame divided into groups for above-mentioned MU-MIMO, and the 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 is described by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, for from 0 to 8 nine integers.
Under foregoing, the RTS frame that AP sends carries data flow indication information, such as, dose data flow indication information at its N sTSin territory, indication information is as follows: the data fluxion occupying STA and STA-2 organizing interior first position in grouping is N2, the data fluxion occupying STA and STA-1 organizing interior second position in instruction grouping is N1, the data fluxion occupying STA and STA-3 of the 3rd position in group in instruction grouping is N3, and the data fluxion occupying STA and STA-4 of the 4th position in group in instruction grouping is N4.
Assuming that: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of simultaneously RTS frame is designated the MAC Address of STA-1.
Each STA proceeds as follows after receiving above-mentioned RTS frame:
After STA-1 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information (i.e. sequence of positions: 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 grouping, need to reply CTS frame, because it occupies interior second position of group, and the data fluxion occupying the STA organizing interior first position is not 0, thus needs second to reply CTS frame.
After STA-2 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know first position laid oneself open in (STA-2, STA-1, STA-3, STA-4) grouping, STA-2 needs to reply CTS frame, because it occupies interior first position of group, thus needs first to reply CTS frame.
After STA-3 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) grouping in the 3rd position, according to the inventive method, STA-3 needs to reply CTS frame, because it occupies the 3rd position in group, and the data fluxion occupying the STA of the first two position in group is not 0, thus needs the 3rd to reply CTS frame.
After STA-4 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) grouping in the 4th position, according to the inventive method, STA-4 needs to reply CTS frame, because it occupies the 4th position in group, and the data fluxion occupying the STA of first three position in group is not 0, thus needs the 4th to reply CTS frame.
Thus in the present embodiment, STA and the order thereof of finally replying CTS frame are as follows:
First that reply CTS frame is STA-2;
Second that reply CTS frame is STA-1;
3rd that reply CTS frame is STA-3;
4th that reply CTS frame is STA-4.
After AP receives above-mentioned CTS frame, determine channel booking success, during channel booking, in this grouping, transmit data.
After STA in the present embodiment receives RTS frame, determine that the data fluxion of each STA is not 0, then reply CTS frame according to the sequence of positions in the grouping at its place, and then complete channel booking, improve 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 by sequence of positions: STA-2, STA-1, STA-3, STA-4 inform the STA in this grouping.
Before sending data to above-mentioned MU-MIMO grouping, first AP sends the RTS frame divided into groups for above-mentioned MU-MIMO, and the 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 is described by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, for from 0 to 8 nine integers.
Under foregoing, the RTS frame that AP sends carries data flow indication information, such as, dose data flow indication information at its N sTSin territory, indication information is as follows: the data flow-number occupying STA and STA-2 organizing interior first position in grouping is N2, the data fluxion occupying STA and STA-1 organizing interior second position in instruction grouping is N1, the data fluxion occupying STA and STA-3 of the 3rd position in group in instruction grouping is N3, and the data fluxion occupying STA and STA-4 of the 4th position in group in instruction grouping is N4.
Assuming that: N1=0, N2=3, N3=2, N4=0, the reception MAC Address in the mac frame head of simultaneously RTS frame is designated the MAC Address of STA-1.
Each STA proceeds as follows after receiving RTS frame:
After STA-1 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 3, the data fluxion occupying the STA organizing interior second position is 0, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 0; Recycle paid-in grouping information, know second position laid oneself open in (STA-1, STA-2, STA-3, STA-4) grouping, because its data fluxion is 0, so do not reply CTS frame.
After STA-2 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 3, the data fluxion occupying the STA organizing interior second position is 0, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 0; Recycle paid-in grouping information, know first position laid oneself open in (STA-1, STA-2, STA-3, STA-4) grouping, STA-2 needs to reply CTS, and owing to occupying interior first position of group, therefore STA-2 first replys CTS.
After STA-3 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 3, the data fluxion occupying the STA organizing interior second position is 0, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 0; Recycle paid-in grouping information, know and lay oneself open to (STA-1, STA-2, STA-3, STA-4) in grouping, and itself occupy the 3rd position in group, STA-3 needs to reply CTS frame, because the STA-1 occupying second position does not have data in this MU-MIMO transmission, therefore STA-3 second replys CTS frame.
After STA-4 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 3, the data fluxion occupying the STA organizing interior second position is 0, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 0; Recycle paid-in grouping information, know the 4th position laid oneself open in (STA-1, STA-2, STA-3, STA-4) grouping, because its data fluxion is that 0, STA-4 does not need to reply CTS frame.
Thus in this embodiment, STA and the order thereof of finally replying CTS frame are as follows:
First that reply CTS frame is STA-2;
Second that reply CTS frame is STA-3.
After AP receives above-mentioned CTS frame, determine channel booking success, during channel booking, in this grouping, transmit data.
After STA in the present embodiment receives RTS frame, the data fluxion defining STA is 0, then, after adjusting the sequence of positions in the grouping at its place, reply CTS frame, and then complete channel booking, improve data transmission efficiency according to new sequence of positions.
Embodiment 3
MU-MIMO in the present embodiment is grouped into: (STA-2, STA-1, STA-3, STA-4), and AP is by sequence of positions: STA-2, STA-1, STA-3, STA-4 inform the STA in this grouping.
Before sending data to above-mentioned MU-MIMO grouping, first AP sends the RTS frame divided into groups for above-mentioned MU-MIMO, and the 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 is described by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, for from 0 to 8 nine integers.
Under foregoing, the RTS frame that AP sends carries data flow indication information, such as, dose data flow indication information at its N sTSin territory, indication information is as follows: the data fluxion occupying STA and STA-2 organizing interior first position in grouping is N2, the data fluxion occupying STA and STA-1 organizing interior second position in instruction grouping is N1, the data fluxion occupying STA and STA-3 of the 3rd position in group in instruction grouping is N3, and the data fluxion occupying STA and STA-4 of the 4th position in group in instruction grouping is N4.
Assuming that: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of simultaneously RTS frame is designated the MAC Address of STA-1, and the STA-1 of this MAC Address mark is primary website in the present embodiment.
Each STA proceeds as follows after receiving RTS frame:
After STA-1 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Resolve the mac address information of the receiver address instruction in the mac frame head of RTS frame, the STA of this mac address information mark is STA-1, and namely primary STA is STA-1, recycles paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) second position in grouping, need to reply CTS frame, owing to itself being primary STA, although occupy interior second position of group, first is needed to reply CTS frame.
After STA-2 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Resolve the mac address information of the receiver address instruction in the mac frame head of RTS frame, the STA of this mac address information mark is STA-1, and namely primary STA is STA-1, recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) first position in grouping, according to the inventive method, STA-2 needs to reply CTS frame, and the data fluxion due to primary STA is not 0, need first to reply CTS, therefore STA-2 want second to reply CTS frame.
After STA-3 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Resolve the mac address information of the receiver address instruction in the mac frame head of RTS frame, the STA of this mac address information mark is STA-1, namely primary STA is STA-1, recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) the 3rd position in grouping, according to the inventive method, STA-3 needs to reply CTS frame, because it occupies the 3rd position in group, and the data fluxion occupying the STA of the first two position in group is not 0, before primary STA is also in itself simultaneously, the 3rd is thus needed to reply CTS frame.
After STA-4 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Resolve the mac address information of the receiver address instruction in the mac frame head of RTS frame, the STA of this mac address information mark is STA-1, namely primary STA is STA-1, recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) the 4th position in grouping, STA-4 needs to reply CTS frame, and because it occupies the 4th position in group, and the data fluxion occupying the STA of first three position in group is not 0, before primary STA is also in itself simultaneously, the 4th is thus needed to reply CTS frame.
Thus in this embodiment, STA and the order thereof of finally replying CTS frame are as follows:
First that reply CTS frame is STA-1;
Second that reply CTS frame is STA-2;
3rd that reply CTS frame is STA-3;
4th that reply CTS frame is STA-4.
After AP receives above-mentioned CTS frame, determine channel booking success, during channel booking, in this grouping, transmit data.
After STA in the present embodiment receives RTS frame, determine that the data fluxion of each STA is not 0, and specify primary website in this RTS frame, the order of each website is then adjusted according to primary website sequence of positions in a packet, obtain new sequence of positions, reply CTS frame according to new sequence of positions, and then complete channel booking, improve data transmission efficiency.
Data fluxion in above-described embodiment also can replace with certain indicators, such as: the data fluxion not being 0 replaced with " Y ", the data fluxion for 0 is replaced with " N ".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 by sequence of positions: STA-2, STA-1, STA-3, STA-4 inform the STA in this grouping.
Before sending data to above-mentioned MU-MIMO grouping, first AP sends the RTS frame divided into groups for above-mentioned MU-MIMO, and the 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 is described by N4 data flow; Wherein the span of N1, N2, N3, N4 is identical, for from 0 to 8 nine integers.
Under foregoing, the RTS frame that AP sends carries data flow indication information, such as, dose data flow indication information at its N sTSin territory, indication information is as follows: the data fluxion occupying STA and STA-2 organizing interior first position in grouping is N2, the data fluxion occupying STA and STA-1 organizing interior second position in instruction grouping is N1, the data fluxion occupying STA and STA-3 of the 3rd position in group in instruction grouping is N3, and the data fluxion occupying STA and STA-4 of the 4th position in group in instruction grouping is N4.
Assuming that: N1=3, N2=1, N3=2, N4=2, the reception MAC Address in the mac frame head of simultaneously RTS frame is designated the MAC Address of STA-1.
Each STA proceeds as follows after receiving RTS frame:
After STA-1 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) grouping in second position, need reply CTS, due to one's own data fluxion N1=3, in group at most, first is thus needed to reply CTS frame.
After STA-2 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) first position in grouping, STA-2 needs to reply CTS frame, due to one's own data fluxion N2=1, minimum in group, thus need the 4th to reply CTS frame.
After STA-3 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is: the data fluxion occupying the STA organizing interior first position be this time about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) the 3rd position in grouping, STA-3 needs to reply CTS frame, due to one's own data fluxion N3=2, the STA many in group internal ratio oneself data fluxion has 1, and the STA identical with oneself fluxion has 1, oneself position in group is more forward than the STA position group in identical with oneself data fluxion, thus needs second to reply CTS frame.
After STA-4 receives RTS frame, detect the N of RTS frame sTSterritory, the information obtained is, this time the data fluxion occupying the STA organizing interior first position be about in the grouping belonging to MU-MIMO data of transmission is 1, the data fluxion occupying the STA organizing interior second position is 3, the data fluxion occupying the STA of the 3rd position in group is 2, and the data fluxion occupying the STA of the 4th position in group is 2; Recycle paid-in grouping information, know and lay oneself open to (STA-2, STA-1, STA-3, STA-4) the 4th position in grouping, STA-4 needs to reply CTS frame, due to one's own data fluxion N4=2, the STA many in the data fluxion of group internal ratio oneself has 1, and the STA identical with the data fluxion of oneself has 1, oneself position in group more rearward, thus needs the 3rd to reply CTS frame than the position of the STA identical with oneself data fluxion in group.
Thus in the present embodiment, STA and the order thereof of finally replying CTS frame are as follows:
First that reply CTS frame is STA-1;
Second that reply CTS frame is STA-3;
3rd that reply CTS frame is STA-4;
4th that reply CTS frame is STA-2.
After AP receives above-mentioned CTS frame, determine channel booking success, during channel booking, in this grouping, transmit data.
After STA in the present embodiment receives RTS frame, determine that the data fluxion of each STA is not 0, then determine the order of replying CTS frame according to its data flow size in a packet, and then complete channel booking, improve data transmission efficiency.
The embodiment of the present invention additionally provides a kind of access point, this access point comprises: initial frame sending module, for sending initial frame, wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used to indicate the website of replying response frame in MU-MIMO grouping.
As shown in Figure 2, this access point comprises:
Sequence of positions notification module 22, for MU-MIMO grouping information is informed to each website, wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Initial frame sending module 24 comprises:
Order corresponding unit 242, indicates each website in MU-MIMO grouping whether to reply response frame for response frame being replied indication information according to positional information order successively;
Transmitting element 244, for sending initial frame, the response frame that this initial frame carries in said sequence corresponding unit 242 replys indication information.
Preferably, this access point also comprises: channel booking determination module, for receive above-mentioned station replies response frame after, determine and channel booking success between this website.
The access point of the present embodiment carries by sending the initial frame that response frame replys indication information, whether the website solved during MU-MIMO cannot be indicated to divide into groups replys the problem of response frame, for channel booking successfully provides guarantee, and then the transmission speed of data can be improved.
The embodiment of the present invention additionally provides a kind of website, and as shown in Figure 3, this website comprises:
Receiver module 32, for receiving 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 to indicate the website of replying response frame in multi-user's multiple-input and multiple-output MU-MIMO grouping at website place;
Response frame replys module 34, determines whether to reply response frame for replying indication information according to response frame; If so, response frame is replied.
This website also comprises: sequence of positions receiver module, and for receiving the MU-MIMO grouping information that access point sends, wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Response frame is replied module 34 and is comprised:
Determining unit, determines to reply response frame for replying indication information according to response frame;
Reply order determination unit, after determining to reply response frame for determining unit, reply the reply order of indication information and sequence of positions information determination response frame according to response frame; Wherein, reply sequentially refer to website and MU-MIMO divide into groups in the precedence of other station replies response frame;
Reply unit, reply response frame for the order determined according to reply order determination unit.
Preferably, above-mentioned reply order determination unit can comprise one of following:
First determines subelement, determines that in MU-MIMO grouping, each website all needs to reply response frame, then determine that the reply order of response frame is order corresponding to sequence of positions information for replying indication information according to response frame.
Second determines subelement, for determining whether self replys response frame according to response frame reply indication information and sequence of positions information; If so, the website of replying response frame will do not needed to delete, obtain new sequence of positions in sequence of positions information, the reply of website determination response frame order is order corresponding to new sequence of positions; If not, response frame is not replied.
If the initial frame that receiver module 32 receives also carries primary website indication information; Above-mentioned reply order determination unit can also comprise:
3rd determines subelement, for judging according to primary website indication information whether self is primary website; If so, reply indication information according to response frame and determine self to need to reply response frame, then determine that the reply order of response frame is first reply; If not, primary website in sequence of positions information is taken out placement first, adjusted according to the relative position in the order information of position by other website, the sequence of positions that must make new advances, the reply of website determination response frame order is order corresponding to new sequence of positions.
If the response frame in the initial frame that receiver module 32 receives replys the data fluxion that indication information is each website in MU-MIMO grouping; Above-mentioned reply order determination unit can also comprise:
4th determines subelement, sorts for each website in dividing into groups according to the large young pathbreaker MU-MIMO of data fluxion, determines that the reply order of response frame is the order after sequence.
Preferably, the 4th determines that subelement comprises: sequence subelement, for when there being the data fluxion of multiple website equal, determines the sequence between multiple website according to sequence of positions information.
The website of the present embodiment, by replying the instruction reply response frame in indication information according to response frame, completes channel booking with access point, solves in MU-MIMO transmission the problem that cannot determine whether to reply response frame.And then improve the speed of transmission data.
As shown in Figure 4, the embodiment of the present invention additionally provides a kind of channel booking system, and in MU-MIMO transmission, this system comprises: access point 20 and website 30.
This access point 20 and website 30 can adopt the mode in above-described embodiment to realize, such as:
Access point 20 comprises: initial frame sending module, and for sending initial frame, wherein, initial frame carries response frame and replys indication information, and response frame is replied indication information and is used to indicate during multi-user's multiple-input and multiple-output MU-MIMO divides into groups the website of replying response frame; Channel booking determination module, for receive station replies response frame after, determine and channel booking success between website;
Website 30 comprises: receiver module, for receiving the initial frame from access point 20; Response frame replys module, determines whether to reply response frame for replying indication information according to response frame; If so, response frame is replied.
Preferably, access point 20 also comprises: sequence of positions notification module, and for MU-MIMO grouping information is informed to each website, wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Initial frame sending module comprises: order corresponding unit, indicates each website in MU-MIMO grouping whether to reply response frame for response frame being replied indication information successively according to sequence of positions information.
Website 30 also comprises: sequence of positions receiver module, for receiving the MU-MIMO grouping information that access point sends;
Response frame is replied module and is comprised: determining unit, determines to reply response frame for replying indication information according to response frame; Reply order determination unit, after determining to reply response frame for determining unit, reply the reply order of indication information and sequence of positions information determination response frame according to response frame; Wherein, reply sequentially refer to website and MU-MIMO divide into groups in the precedence of other station replies response frame; Reply unit, reply response frame for the order determined according to reply order determination unit;
Reply order determination unit comprises:
First determines subelement, determines that in MU-MIMO grouping, each website all needs to reply response frame, then determine that the reply order of response frame is order corresponding to sequence of positions information for replying indication information according to response frame.
Reply order determination unit comprises:
Second determines subelement, for determining whether self replys response frame according to response frame reply indication information and sequence of positions information; If so, the website of replying response frame will do not needed to delete, obtain new sequence of positions in sequence of positions information, the reply of website determination response frame order is order corresponding to new sequence of positions; If not, response frame is not replied.
When the initial frame that initial frame sending module sends also carries primary website indication information; Reply order determination unit comprises:
3rd determines subelement, for judging according to primary website indication information whether self is primary website; If so, reply indication information according to response frame and determine self to need to reply response frame, then determine that the reply order of response frame is first reply; If not, primary website in sequence of positions information is taken out placement first, adjusted according to the relative position in the order information of position by other website, the sequence of positions that must make new advances, the reply of website determination response frame order is order corresponding to new sequence of positions.
When the response frame reply indication information in the initial frame that initial frame sending module sends is the data fluxion of each website in MU-MIMO grouping; Reply order determination unit comprises:
4th determines subelement, sorts for each website in dividing into groups according to the large young pathbreaker MU-MIMO of data fluxion, determines that the reply order of response frame is the order after sequence.
4th determines that subelement comprises: sequence subelement, for when there being the data fluxion of multiple website equal, determines the sequence between multiple website according to sequence of positions information.
Be described to be embodied as example in IEEE802.11 system below, wherein, the RTS frame in initial frame use system, the CTS frame in response frame use system, response frame replys the data flow indication information in the multiplexing RTS frame of indication information.Those skilled in the art, based on the implementation under this system, also can realize 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 present invention, this system comprises: access point 20 and the multiple websites be connected with access point 20, multiple websites in the present embodiment are website 30, website 32 and website 34, and these three websites belong to same MU-MIMO divides into groups, have identical function, the present embodiment is only described for website 30.
Access point 20, for sending RTS frame, and receive MU-MIMO grouping in website 30 reply CTS frame after, determine and between this website channel booking success; Wherein, RTS frame carries data flow indication information;
Website 30, after receiving RTS frame, determines whether to reply CTS frame according to data flow indication information, if so, replys CTS frame; After determining to reply CTS frame, reply order can also be determined according to data flow indication information.Wherein, reply sequentially refer to website 30 and MU-MIMO divide into groups in the precedence of other station replies CTS frame.
The present embodiment carries data flow indication information by access point 20 when sending RTS frame, make website 30 can determine the reply order of CTS according to this information, and then complete channel booking, solve the problem of channel booking failure in MU-MIMO transmission, improve data transmission efficiency.
As shown in Figure 6, access point 20 comprises: location information notification module 202, and for MU-MIMO grouping information is informed to each website, wherein, grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; Data flow indication information in the RTS frame that access point sends is the data fluxion of each website in indicating MU-MIMO to divide into groups successively according to this sequence of positions information.
Website 30 comprises: reply order determination module 302, for determining the reply order of CTS frame according to the data fluxion of each website and sequence of positions information in MU-MIMO grouping.
When website 30 specific implementation determines the reply order of CTS frame, can be accomplished in several ways, such as:
Mode one: website 30 comprises: the first data fluxion determination module, for determining that according to data flow indication information the data fluxion of each website in MU-MIMO grouping is not all 0; First reply order determination module, for determining that the reply order of CTS frame is order corresponding to above-mentioned sequence of positions information.
Whether mode two: website 30 comprises: the second data fluxion determination module is 0 for the data fluxion determining self according to data flow indication information and above-mentioned sequence of positions information; Second reply order determination module, the result determined for the second data fluxion determination module if YES, does not reply CTS; If NO, be that the website of 0 is deleted by data fluxion in above-mentioned sequence of positions information, obtain new sequence of positions, determine that the reply order of CTS frame is for order corresponding to new sequence of positions.
Mode three: the RTS frame that access point 20 sends also carries primary website indication information, such as: the reception MAC Address mark in the mac frame head of RTS frame; Website 30 comprises: primary website judge module, for judging according to primary website indication information whether self is primary website; 3rd reply order determination module, for primary website judge module judged result if YES, determine that according to data flow indication information the data fluxion of self is not 0, then determine that the reply order of CTS frame is for first reply; If not, primary website in above-mentioned sequence of positions information is taken out placement first, other website is adjusted according to the relative position in above-mentioned sequence of positions information, the sequence of positions that must make new advances, determine that the reply order of CTS frame is for order corresponding to new sequence of positions.
Mode four: website 30 comprises: order module, sorts for each website in dividing into groups according to the large young pathbreaker MU-MIMO of data fluxion; 4th reply order determination module, for determining that the reply order of CTS frame is for the order after order module sequence.
Consider that the data fluxion of different website is likely equal, so in this manner, order module also comprises: sequencing unit, for when there being the data fluxion of multiple website equal, determines the sequence between multiple website according to above-mentioned sequence of positions information.
The access point of the embodiment of the present invention, by transmission RTS, just can make the multiple websites in a MU-MIMO grouping determine the reply order of CTS, complete channel booking operation, improve efficiency of transmission and the success rate of data according to this order.
From above description, can find out, present invention achieves following technique effect: above embodiment is by carrying out MU-MIMO grouping to multiple website, the order of each station replies CTS is determined in grouping, the channel booking of this grouping can be completed as early as possible, prevent the interference of hiding website, ensure that access point successfully transmits data.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (27)

1. an initial frame sending method, is characterized in that, in multi-user's multiple-input and multiple-output MU-MIMO transmission, comprising:
Access point sends initial frame, and wherein, described initial frame carries response frame and replys indication information;
Before described access point sends initial frame, described method also comprises: MU-MIMO grouping information is informed to each website by described access point, and wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
It is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame that described response frame replys indication information;
Wherein, described response frame replys the data fluxion that indication information is each website.
2. method according to claim 1, is characterized in that, described initial frame also carries primary website indication information.
3. the method according to any one of claim 1-2, is characterized in that, after described access point sends initial frame, described method also comprises:
After described access point receives the response frame of described station replies, determine and between described website channel booking success.
4. a response frame answering method, is characterized in that, in multi-user's multiple-input and multiple-output MU-MIMO transmission, comprising:
Website in MU-MIMO grouping receives the initial frame from access point, and wherein, described initial frame carries response frame and replys indication information;
Described website is replied indication information according to described response frame and is determined whether to reply described response frame; If so, response frame described in described station replies, described access point is determined and between described website channel booking success;
Before website in described MU-MIMO grouping receives the initial frame from access point, described method also comprises: the website in described MU-MIMO grouping receives the MU-MIMO grouping information from access point, wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Described in described station replies, response frame comprises: described website replys the reply order of indication information and described sequence of positions information determination response frame according to described response frame; Wherein, described response frame replys indication information is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame; Described reply sequentially refer to described website and described MU-MIMO divide into groups in the precedence of other station replies response frame; Described website replys described response frame according to the order determined;
Wherein, described response frame replys the data fluxion that indication information is each website.
5. method according to claim 4, is characterized in that, the reply order that described website replys indication information and described sequence of positions information determination response frame according to described response frame comprises:
Described website is replied indication information according to described response frame and is determined that in described MU-MIMO grouping, each website all needs to reply response frame;
The reply order of described website determination response frame is order corresponding to described sequence of positions information.
6. method according to claim 4, is characterized in that, the reply order that described website replys indication information and described sequence of positions information determination response frame according to described response frame comprises:
Described website replys indication information according to described response frame and described sequence of positions information determines whether self replys response frame;
If so, described website will not need the website of replying response frame to delete in described sequence of positions information, obtain new sequence of positions, and the reply of described website determination response frame order is order corresponding to described new sequence of positions;
If not, response frame is not replied.
7. method according to claim 4, is characterized in that, the initial frame that described website receives also carries primary website indication information;
The reply order that described website replys indication information and described sequence of positions information determination response frame according to described response frame comprises:
According to described primary website indication information, described website judges whether self is primary website;
If so, reply indication information according to described response frame and determine self to need to reply response frame, then determine that the reply order of response frame is first reply;
If not, primary website in described sequence of positions information is taken out placement first, other website is adjusted according to the relative position in described sequence of positions information, the sequence of positions that must make new advances, the reply order of described website determination response frame is order corresponding to described new sequence of positions.
8. method according to claim 4, it is characterized in that, the reply order that described website replys indication information and described sequence of positions information determination response frame according to described response frame comprises: described website according to described data fluxion large young pathbreaker described in each website in MU-MIMO grouping sort; The reply order of described website determination response frame is the order after described sequence.
9. method according to claim 8, is characterized in that, described website according to described data fluxion large young pathbreaker described in each website in MU-MIMO grouping carry out sequence and comprise:
When there being the data fluxion of multiple website equal, determine the sequence between described multiple website according to described sequence of positions information.
10. a channel booking method, is characterized in that, in multi-user's multiple-input and multiple-output MU-MIMO transmission, described method comprises:
Access point sends initial frame, and wherein, described initial frame carries response frame and replys indication information;
After website in described MU-MIMO grouping receives described initial frame, reply indication information according to described response frame and determine whether to reply described response frame; If so, response frame described in described station replies;
After described access point receives the response frame of described station replies, determine and between described website channel booking success;
Before described access point sends initial frame, described method also comprises: MU-MIMO grouping information is informed to each website by described access point, and wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
It is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame that described response frame replys indication information;
Described in described station replies, response frame comprises: described website replys the reply order of indication information and described sequence of positions information determination response frame according to described response frame; Wherein, described reply sequentially refer to described website and described MU-MIMO divide into groups in the precedence of other station replies response frame; Described website replys described response frame according to the order determined;
Wherein, described response frame replys the data fluxion that indication information is each website.
11. 1 kinds of access points, is characterized in that, comprising:
Initial frame sending module, for sending initial frame, wherein, described initial frame carries response frame and replys indication information;
Described access point is also for informing to each website by multi-user's multiple-input and multiple-output MU-MIMO grouping information, and wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping; It is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame that described response frame replys indication information;
Wherein, described response frame replys the data fluxion that indication information is each website.
12. access points according to claim 11, it is characterized in that, described access point also comprises: sequence of positions notification module, for MU-MIMO grouping information is informed to each website, wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Described initial frame sending module comprises:
Order corresponding unit, indicates each website in described MU-MIMO grouping whether to reply response frame for described response frame being replied indication information according to described sequence of positions information successively.
13. access points according to claim 11 or 12, it is characterized in that, described access point also comprises: channel booking determination module, for receive described station replies response frame after, determine and channel booking success between described website.
14. 1 kinds of websites, is characterized in that, comprising:
Receiver module, for receiving the initial frame from access point, wherein, described initial frame carries response frame and replys indication information;
Described website is also for receiving the multi-user's multiple-input and multiple-output MU-MIMO grouping information from access point, and wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Reply described response frame to comprise: described website replys the reply order of indication information and described sequence of positions information determination response frame according to described response frame; Wherein, described response frame replys indication information is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame; Described reply sequentially refer to described website and described MU-MIMO divide into groups in the precedence of other station replies response frame; Described website replys described response frame according to the order determined;
Response frame replys module, determines whether to reply described response frame for replying indication information according to described response frame; If so, described response frame is replied;
Wherein, described response frame replys the data fluxion that indication information is each website.
15. websites according to claim 14, it is characterized in that, described website also comprises: sequence of positions receiver module, for receiving the MU-MIMO grouping information that described access point sends, wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Described response frame is replied module and is comprised:
Determining unit, determines to reply described response frame for replying indication information according to described response frame;
Reply order determination unit, after determining to reply described response frame for described determining unit, reply the reply order of indication information and described sequence of positions information determination response frame according to described response frame; Wherein, described reply sequentially refer to described website and described MU-MIMO divide into groups in the precedence of other station replies response frame;
Reply unit, reply described response frame for the order determined according to described reply order determination unit.
16. websites according to claim 15, is characterized in that, described reply order determination unit comprises:
First determines subelement, for reply according to described response frame indication information determine described MU-MIMO divide into groups in each website all need to reply response frame, and determine that the reply order of response frame is for order corresponding to described sequence of positions information.
17. websites according to claim 16, is characterized in that, described reply order determination unit comprises:
Second determines subelement, for determining whether self replys response frame according to described response frame reply indication information and described sequence of positions information; If so, the website of replying response frame will do not needed to delete, obtain new sequence of positions in described sequence of positions information, the reply of described website determination response frame order is order corresponding to described new sequence of positions; If not, response frame is not replied.
18. websites according to claim 15, is characterized in that, the initial frame that described receiver module receives also carries primary website indication information;
Described reply order determination unit comprises:
3rd determines subelement, for judging according to described primary website indication information whether self is primary website; If so, reply indication information according to described response frame and determine self to need to reply response frame, and determine that the reply order of response frame is first reply; If not, primary website in described sequence of positions information is taken out placement first, other website is adjusted according to the relative position in described sequence of positions information, the sequence of positions that must make new advances, the reply order of described website determination response frame is order corresponding to described new sequence of positions.
19. websites according to claim 15, is characterized in that, described reply order determination unit comprises:
4th determines subelement, sorts for each website in MU-MIMO grouping described in the large young pathbreaker according to described data fluxion, determines that the reply order of response frame is the order after described sequence.
20. websites according to claim 16, is characterized in that, the described 4th determines that subelement comprises:
Sequence subelement, for when there being the data fluxion of multiple website equal, determines the sequence between described multiple website according to described sequence of positions information.
21. 1 kinds of channel booking systems, is characterized in that, comprising: access point and website;
Described access point comprises: initial frame sending module, and for sending initial frame, wherein, described initial frame carries response frame and replys indication information; Channel booking determination module, for receive described station replies response frame after, determine and channel booking success between described website;
Described access point is also for informing to each website by multi-user's multiple-input and multiple-output MU-MIMO grouping information, and wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
It is the information that in indicating described MU-MIMO to divide into groups successively according to described sequence of positions information, whether each website replys response frame that described response frame replys indication information
Described website comprises: receiver module, for receiving the initial frame from described access point; Response frame replys module, determines whether to reply described response frame for replying indication information according to described response frame; If so, described response frame is replied;
Wherein, described response frame replys the data fluxion that indication information is each website.
22. systems according to claim 21, it is characterized in that, described access point also comprises: sequence of positions notification module, for MU-MIMO grouping information is informed to each website, wherein, described grouping information comprises the sequence of positions information of contained website in MU-MIMO grouping;
Described initial frame sending module comprises:
Order corresponding unit, indicates each website in described MU-MIMO grouping whether to reply response frame for described response frame being replied indication information according to described sequence of positions information successively;
Described website also comprises: sequence of positions receiver module, for receiving the MU-MIMO grouping information that described access point sends;
Described response frame is replied module and is comprised: determining unit, determines to reply described response frame for replying indication information according to described response frame; Reply order determination unit, after determining to reply described response frame for described determining unit, reply the reply order of indication information and described sequence of positions information determination response frame according to described response frame; Wherein, described reply sequentially refer to described website and described MU-MIMO divide into groups in the precedence of other station replies response frame; Reply unit, reply described response frame for the order determined according to described reply order determination unit.
23. systems according to claim 22, is characterized in that, described reply order determination unit comprises:
First determines subelement, for reply according to described response frame indication information determine described MU-MIMO divide into groups in each website all need to reply response frame, and determine that the reply order of response frame is for order corresponding to described sequence of positions information.
24. systems according to claim 22, is characterized in that, described reply order determination unit comprises:
Second determines subelement, for determining whether self replys response frame according to described response frame reply indication information and described sequence of positions information; If so, the website of replying response frame will do not needed to delete, obtain new sequence of positions in described sequence of positions information, the reply of described website determination response frame order is order corresponding to described new sequence of positions; If not, response frame is not replied.
25. systems according to claim 22, is characterized in that, the initial frame that described initial frame sending module sends also carries primary website indication information;
Described reply order determination unit comprises:
3rd determines subelement, for judging according to described primary website indication information whether self is primary website; If so, reply indication information according to described response frame and determine self to need to reply response frame, and determine that the reply order of response frame is first reply; If not, primary website in described sequence of positions information is taken out placement first, other website is adjusted according to the relative position in described sequence of positions information, the sequence of positions that must make new advances, the reply order of described website determination response frame is order corresponding to described new sequence of positions.
26. systems according to claim 22, is characterized in that, the response frame in the initial frame that described initial frame sending module sends replys the data fluxion that indication information is each website during described MU-MIMO divides into groups;
Described reply order determination unit comprises:
4th determines subelement, sorts for each website in MU-MIMO grouping described in the large young pathbreaker according to described data fluxion, determines that the reply order of response frame is the order after described sequence.
27. systems according to claim 26, is characterized in that, the described 4th determines that subelement comprises:
Sequence subelement, for when there being the data fluxion of multiple website equal, determines the sequence between described multiple website according to described 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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