CN102457350B - Data transmission method and system - Google Patents
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- CN102457350B CN102457350B CN201010520378.6A CN201010520378A CN102457350B CN 102457350 B CN102457350 B CN 102457350B CN 201010520378 A CN201010520378 A CN 201010520378A CN 102457350 B CN102457350 B CN 102457350B
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Abstract
The invention discloses a data transmission method and system. The method comprises the following steps of: determining, by an access point, a multi-user multiple input multiple output (MU-MIMO) group of data to be received; acquiring transmission opportunity of transmitting data to the group; and changing the MU-MIMO group of the data to be received to transmit data to the changed group if a site which does not meet receiving conditions exists in the group in the process of acquiring the transmission opportunity. In the invention, data of other sites is transmitted as supplement when the data cannot be transmitted to a part of MU-MIMO sites expected initially; or when a part of users finish transmission in advance in a frame sequence exchange, new data is transferred to improve the throughput and enhance the system performance.
Description
Technical field
The present invention relates to WLAN (wireless local area network), particularly relate to a kind of data transmission method and system.
Background technology
MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) system is the technology utilizing many transmit antennas and Duo Gen reception antenna to carry out wireless transmission, a technology received much attention in the research of Long Term Evolution (Long Term Evolution is called for short LTE) is become because it effectively improves channel capacity.
In the cellular system, MIMO (MU-MIMO) technology utilizing space multiplexing technique to realize multi-user transmission greatly can improve the spectrum efficiency of system, the mode that all data of multiple user or partial data adopt identical frequency to divide with sky simultaneously sends, in the cellular system according to scheduling and controlling channel, base station can send MU-MIMO data to fixed MU-MIMO pairing terminal, and retransmits the data of makeing mistakes.
At present, IEEE802.11 series standard only supports single user space multiplexing technique (SU-MIMO).IEEE 802.11ac supports MU-MIMO transmission as the improvement version of 802.11 agreements, WLAN (WLAN (wireless local area network)) system and cellular system maximum be not both wlan system adopt based on competition CSMA/CA agreement, its up-downgoing conversion does not have fixing transfer point, medium right to occupation is preengage by RTS (request sends) and CTS (clear to send) in process of transmitting, also there is the access way of other expansions in wlan system, such as HCCA (Hybrid mode channel access) and EDCA (distributed channel access of enhancing).
But due to data send sudden, can not ensure that, in a burst transfer or frame sequence exchange, the transmission time of all MU-MIMO websites is identical, if in configuration reservation process, because reasons such as collisions, data can not be sent to the initial part MU-MIMO website expected, and can not to send other station datas as a supplement, or in a frame sequence exchange, certain customers' transmission in advance is complete, and new data can not be transmitted, then throughput reduces, and systematic function declines.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of data transmission method and system, solves the problem that in data transmission procedure, throughput reduces.
For solving the problems of the technologies described above, a kind of data transmission method of the present invention, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain the send opportunity sending data to this grouping, in the process obtaining send opportunity, if there is the website not meeting condition of acceptance in this grouping, then change the MU-MIMO grouping that will receive data, the grouping after changing sends data.
Further, access point change to receive data MU-MIMO grouping comprise:
Access point select to receive data MU-MIMO grouping beyond grouping as change after grouping, wherein, comprise in selected grouping in the MU-MIMO grouping that will receive data and meet the website of condition of acceptance and newly-increased website, and there are the data sending to newly-increased website in access point.
Further, the website not meeting condition of acceptance is that after access point sends transmission frame to the website in the MU-MIMO grouping that will receive data in the process obtaining send opportunity, this access point does not receive the website of the response frame that it sends.
Further, access point determines that the MU-MIMO grouping that will receive data comprises:
Access point determines primary user, selects to comprise the maximum grouping of primary user as the MU-MIMO grouping receiving data from the MU-MIMO grouping configured.
Further, access point comprise primary user maximum be grouped into multiple time, select to comprise from the plurality of grouping dispatching priority the highest from the grouping of user as the MU-MIMO grouping receiving data.
Further, access point, in the process obtaining send opportunity, does not meet the website of condition of acceptance if existed in this grouping, and meets in the website of condition of acceptance and comprise one or more primary user, then change the MU-MIMO grouping that will receive data.
Further, access point comprises to the grouping transmission data after change:
Access point obtains the data of website in the grouping after sending to change, obtains current MU-MIMIO data to be sent, adopts the group mark of the grouping after changing, sends current data to be sent.
Further, when access point sends current data to be sent, for the data sent to primary user in the grouping after changing, send in the mode of segmentation, in this grouping from the data that user sends, send in the mode of single bag; Or, for primary user in the grouping after change and the data from user's transmission, all send in the mode of segmentation.
Further, a kind of data transmission method, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain the send opportunity sending data to this grouping, in the process obtaining send opportunity, if there is the website not meeting condition of acceptance in this grouping, then this not being met stream information corresponding to the website of condition of acceptance is configured to invalid, and the website meeting condition of acceptance in this grouping sends data.
Further, access point to receive data MU-MIMO grouping in meet condition of acceptance website send data time, increase in the data issuing the website meeting condition of acceptance or reduce data flow, and correspondingly revising stream information, to represent the quantity of the data flow that website receives.
Further, a kind of data transmission method, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will send data, getting after the send opportunity of this grouping transmission data, be sent in the data of branch website in the middle part of this grouping, when data to another part website are not also sent, change grouping, wherein, comprise another part website in the grouping after change, the grouping after changing sends data.
Further, access point is sent sending to the data of branch website in the middle part of this grouping, when sending to the data of another part website not also to be sent, if comprise one or more primary user in another part website, then changes grouping.
Further, access point comprises to the grouping transmission data after change:
Access point obtains the data of website in the grouping after sending to change, obtains current MU-MIMIO data to be sent, adopts the group mark of the grouping after changing, sends current data to be sent.
Further, access point is the one or more data sectionals sent in the data of this website to the data that another part website is not also sent.
Further, a kind of data transmission system, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at send opportunity acquisition module, if determine to there is the website not meeting condition of acceptance in this grouping, then change the MU-MIMO grouping that will receive data;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, for sending data to the grouping after change.
Further, when grouping determination module changes the MU-MIMO grouping that will receive data, selection to receive data MU-MIMO grouping beyond grouping as change after grouping, wherein, comprise in selected grouping in the MU-MIMO grouping that will receive data and meet the website of condition of acceptance and newly-increased website, and there are the data sending to newly-increased website in access point.
Further, the website not meeting condition of acceptance is that after send opportunity acquisition module sends transmission frame to the website in the MU-MIMO grouping that will receive data in the process obtaining send opportunity, this send opportunity acquisition module does not receive the website of the response frame that it sends.
Further, when data transmission blocks sends data to the grouping after change, obtain the data of website in the grouping after sending to change, obtain current MU-MIMIO data to be sent, adopt the group mark of the grouping after changing, for the data sent to primary user in the grouping after change, send in the mode of segmentation, for in this grouping from the data that user sends, send in the mode of single bag; Or, for primary user in the grouping after change and the data from user's transmission, all send in the mode of segmentation.
Further, a kind of data transmission system, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at send opportunity acquisition module, if determining to exist in this grouping does not meet the website of condition of acceptance, then this is not met stream information corresponding to the website of condition of acceptance be configured to invalid;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, sends data for the website meeting condition of acceptance in this grouping.
Further, when data transmission blocks meets the website transmission data of condition of acceptance in grouping, increase in the data issuing the website meeting condition of acceptance or reduce data flow, and correspondingly revising stream information, to represent the quantity of the data flow that website receives.
Further, a kind of data transmission system, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will send data, the send opportunity sending data to this grouping is got at send opportunity acquisition module, data transmission blocks is determined to be sent in the data of branch website in the middle part of this grouping, when data to another part website are not also sent, change grouping, wherein, in the grouping after change, comprise another part website;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, for sending data to the grouping after change.
In sum, the present invention when data can not be sent to the initial part MU-MIMO website expected, to send other station datas as a supplement, or in a frame sequence exchange, when certain customers' transmission in advance is complete, transmit new data, to improve throughput, strengthen systematic function.
Accompanying drawing explanation
Fig. 1 is the flow chart of MU-MIMO data transmission method for uplink in present embodiment WLAN (wireless local area network);
Fig. 2 is the frame assumption diagram of MU-MIMO data transmission method for uplink in present embodiment WLAN (wireless local area network);
Fig. 3 is the frame assumption diagram of another kind of MU-MIMO data transmission method for uplink in present embodiment WLAN (wireless local area network);
Fig. 4 is the Organization Chart of MU-MIMO data Transmission system in present embodiment WLAN (wireless local area network).
Embodiment
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
In present embodiment, AP (access point) can according to the channel condition information of STA (website), MU-MIMO pairing is carried out to the STA of the support MU-MIMO being associated to BSS (base station sub-system), MU-MIMO grouping is constructed with these pairings (or claiming subgroup), comprise one or more pairing in grouping, each grouping is assigned groupID (group mark).
When comprising a pairing in a packet, STA can know by groupID the grouping receiving MU-MIMO data to be transmitted, and the STA in this grouping can know the quantity of the data flow whether comprising this STA in data and the data flow comprised by stream information.
When comprising multiple pairing in a packet, because in grouping, each pairing does not comprise the STA of repetition, therefore, STA can know by the MAC Address of a STA in groupID and pairing the pairing receiving MU-MIMO data to be transmitted, STA in this pairing knows the quantity of the data flow whether comprising this STA in data and the data flow comprised by stream information, is used from the MAC Address identifying the pairing receiving MU-MIMO data to be transmitted is above called grouping MAC Address with groupID mono-.
Before sending MU-MIMO data to be transmitted to the grouping (be called for short and receive grouping) that will receive data, AP obtains the send opportunity (TXOP) sending these MU-MIMO data to be transmitted to reception grouping.AP according to the responsive state receiving STA in grouping in the process obtaining send opportunity, can determine the website not meeting condition of acceptance, changes and receive grouping, and the grouping after changing sends data.Access point is selected to receive the grouping beyond dividing into groups as the grouping after change, wherein, comprises in reception grouping and meets the website of condition of acceptance and newly-increased website, and should there are the data sending to newly-increased website in access point in selected grouping.Also can be there is the website not meeting condition of acceptance in a packet, and meet when comprising one or more primary user in the website of condition of acceptance, change and receive grouping.
Access point determines that receiving grouping comprises, determine primary user, select to comprise the maximum grouping of primary user as reception grouping from the MU-MIMO grouping configured, and comprise primary user maximum be grouped into multiple time, select to comprise from the plurality of grouping dispatching priority the highest from the grouping of user as reception grouping.
The step that AP obtains to the TXOP receiving grouping transmission MU-MIMO data to be transmitted comprises: AP sends RTS (request sends) frame, the groupID receiving grouping is carried in the physical frame expense that RTS frame is correlated with, and receiving CTS (clear to send) frame of STA response, AP correctly receives CTS frame and namely thinks and obtain TXOP.
The step that above-mentioned AP receives the CTS frame of STA response comprises: qualified STA responds CTS frame to AP, qualified STA refers to all or part of STA corresponding to MU-MIMO data to be transmitted, the address information of self is write the MAC Address of this CTS frame by the STA of response CTS frame, and AP receives this CTS frame.
Above-mentioned AP correctly receives CTS frame and namely thinks that obtaining TXOP refers to, the quantity of the actual correct CTS frame received of AP may be less than the quantity expecting the correct CTS frame received, according to the MAC Address in the correct CTS frame received, AP can confirm that itself and corresponding STA can carry out the transmission of MU-MIMO data, namely thinks and obtains TXOP.
AP does not correctly receive the website of the CTS frame of its response, can think that this website is the website not meeting condition of acceptance, but the CTS frame correctly not receiving its response can not as the sole cause not meeting condition of acceptance.
The step that AP obtains to the TXOP receiving grouping transmission MU-MIMO data to be transmitted can also be: AP sends Frame, the groupID receiving grouping is carried in the physical frame expense that Frame is correlated with, and receiving the ACK frame of STA response, namely the ACK frame that AP correctly receives response is thought and is obtained TXOP.
The step that above-mentioned AP receives the ACK frame of STA response comprises: the STA of correct receiving data frames responds ACK frame to AP, and the address information of self is write the MAC Address of this ACK frame by the STA of response ACK frame, and AP receives this ACK frame.
Namely the ACK frame that above-mentioned AP correctly receives response thinks that obtaining TXOP refers to, the quantity of the actual correct ACK frame received of AP may be less than the quantity expecting the correct ACK frame received, according to the MAC Address in the correct ACK frame received, AP can confirm that itself and corresponding STA can carry out the transmission of MU-MIMO data, namely thinks and obtains TXOP.
When above-mentioned AP sends RTS frame or Frame, the step of carrying groupID in relevant physical frame expense comprises: the MAC Address of AP write STA in the MAC Address of RTS frame or Frame, groupID is write in physical frame expense, and controlling value is write in the stream information field of STA relevant position, can determine to receive the pairing in grouping by MAC Address and groupID, STA in pairing can determine whether to respond RTS frame or Frame according to stream information, if the stream information that STA is corresponding is effectively, then respond; Otherwise, do not respond.
In the process of above-mentioned acquisition send opportunity, RTS frame and Frame can be called transmission frame, CTS frame and ACK frame are called response frame, the website not meeting condition of acceptance can be defined as access point in the process obtaining send opportunity after the website transmission transmission frame received in grouping, and this access point does not receive the website of the response frame that it sends.
Above-mentioned AP changes reception and divides into groups, and send data to the reception grouping after change and refer to, with the groupID after change in the send opportunity of acquisition, send data to STA in MU-MIMO mode, transmission data can adopt following methods:
AP is in the step obtaining TXOP, AP is that part STA sends data acquisition TXOP in grouping, suppose to be contemplated to and send data acquisition TXOP to m STA, actual in the STA of m expection reception, AP is actual is that k STA wherein sends data acquisition TXOP, k < m, and AP there is no the website that the website sending the send opportunity of data to it can think not meet condition of acceptance, AP can again from other STA beyond this m STA, selection can be carried out i STA of MU-MIMO transmission with an above k STA and there are the data to be sent sending to this i STA in AP, wherein, k STA and i STA needs to belong to same MU-MIMO and divides into groups, the groupID that the groupID of this grouping is used from obtaining TXOP is different, AP sends MU-MIMO data with the groupID after change to k+i STA, k+i≤m, and, the data flow according to sending above-mentioned i STA is needed to reconfigure stream information (stream information is variable).
In addition, AP can not also change reception grouping, change the configuration of stream information, still data are sent to this reception grouping, AP is in the step obtaining TXOP, if AP sends data acquisition TXOP to the part STA in grouping, can send MU-MIMO data with constant groupID to this part STA, the stream information that cannot receive the STA of data corresponding is configured to invalid (stream information is variable).Because in the transmission of MU-MIMO data, the quantity of website reduces, therefore, interference between multi-site is also just corresponding to diminish, thus data flow can be increased in the data issuing each website, the stream information that the MU-MIMO data of transmission are corresponding also needs correspondingly to change, to indicate the quantity of the data flow that website receives, also can reduce data flow in the data issuing each website simultaneously.
Fig. 1 is the flow chart transmitting the method for data in the WLAN (wireless local area network) of a preferred embodiment according to the present embodiment, comprising:
Step 101: configuration MU-MIMO grouping, for each grouping distributes groupID;
AP obtains the channel condition information self arrived between each STA, according to MU-MIMO pairing algorithm, the STA meeting MU-MIMO pairing condition is matched, maximum M (as M≤4) individual STA can be comprised in each pairing, construct MU-MIMO grouping further according to pairing, each MU-MIMO grouping can comprise one or more pairing.
In the present embodiment, suppose to have three MU-MIMO groupings, as follows respectively:
Grouping 1 is { A, D, E, G};
Grouping 2 is { A, E, F, M};
Grouping 3 is { D, E, F, M};
The data to be sent of AP oriented website A, D, E, F, M and N, and not to the outgoing data of website G.
Step 102:AP determines these MU-MIMO data to be sent and STA (target STA) corresponding to MU-MIMO data to be sent, and target STA belongs to same MU-MIMO and divides into groups, and the groupID that this MU-MIMO divides into groups is initial groupID;
AP selects the data to be sent of website A and D as preferred service or user data by internal integration, selects the data to be sent of website E to select business or user data as secondary, forms initial MU-MIMO data to be sent.Website A and D is primary user, and website E is from user.Correspondingly, receive and be grouped into grouping 1, the groupID of grouping 1 is initial groupID.
Access point determines that primary user and the method from user comprise: for the data to be sent of each website that described access point manages, select the individual first-selected user data of the X meeting multi-user's multiple-input and multiple-output matching request successively according to the dispatching priority order from high to low of data and select user data Y time, all select family as primary user much higher time than other from user as primary user or using first-selected user and dispatching priority first-selected user, other times selected family as from user.
The dispatching priority of data considers comprehensive parameters one or more in following parameter: the precedence in the grade of service of data, data queue, the time delay grade of data.
Step 103:AP selects the destination address field of the MAC Address write RTS frame of a STA, send the MAC Address that address field fills in AP, and the physical frame that structure is relevant, by the respective field of the stream information write physical frame expense of initial groupID and MU-MIMO data to be sent;
Particularly, can using the destination address field of the MAC Address of primary user as grouping MAC Address write RTS frame, by the destination address field of the MAC Address of website A write RTS frame in the present embodiment, and form physical frame for RTS frame increases physical overhead, initial groupID is write in physical frame expense, divide into groups for MU-MIMO simultaneously, controlling value is write in the stream information field of the STA relevant position in physical frame expense, make STA can determine to receive the pairing in the MU-MIMO grouping of data according to the groupID of RTS frame and receiver address, and then according to the assignment of stream information, all stream informations STA be set to corresponding to 0 (invalid) is the STA not needing to reply CTS frame, otherwise, need to reply CTS frame.
The STA returning CTS frame is expected in step 104:AP setting, and starts wait CTS timer;
AP setting X expects to return the STA of CTS frame, and these STA set according to the groupID of RTS frame, MAC Address and stream information, such as, can adopt following scheme:
Scheme 1: suppose to comprise pairing { A in MU-MIMO grouping 1, D, E, G}, the groupID of grouping 1 is { 000001}, groupID in RTS be 000001}, MAC Address is the MAC Address of website A, and stream information is { 001,001,001,000}, then the STA that setting three expectations return CTS frame is website A, D and E.
Scheme 2: { A, D, E, G}, the groupID of grouping 1 is that { 000001}, stream information is that { 001,001,001,000}, then the STA that setting three expectations return CTS frame is website A, D and E if MU-MIMO grouping 1 only comprises a pairing.
The STA of Y wherein can also be set to primary user by AP, and wherein two special cases are: 1) X=Y, and namely all expectations return the STA of CTS frame is all primary user; 2) Y is constant at 1, namely only has a primary user, and belonging to primary user's data of this transmission, business is main business.A and D is set as primary user in the present embodiment in initial MU-MIMO grouping.
AP starts wait_CTS timer, and timing time is X*SIFS+X*calcDur, and wherein SIFS is short interFrameGap, and calcDur is the time span that CTS sends.
Step 105: the STA returning CTS frame correctly receives RTS frame if expect, then send CTS frame to AP;
Correctly receive the STA of RTS, according to the groupID in the RTS received, MAC Address and stream information judge whether to meet the condition of replying CTS frame, if this STA belongs to the pairing in the MU-MIMO grouping of groupID and MAC Address instruction, the stream information of this STA relevant position is effective simultaneously, then this STA needs to reply CTS frame, the time point of replying CTS frame can be determined by the relative position of corresponding stream information in stream information field, such as: second the son field place of stream information son field in stream information field of website D, and the stream information son field of website A is effective, then first website A replys CTS frame, website D second replys CTS frame.
Before step 106:AP judges wait_CTS timer expired, whether receive the CTS frame of the STA transmission expecting to return CTS frame, if before wait_CTS timer expired, AP does not correctly receive the CTS frame that arbitrary primary user sends, then perform step 113; Otherwise, perform step 107;
Step 107: redefine the MU-MIMO data to be sent that this sends;
Particularly, redefine the MU-MIMO grouping receiving MU-MIMO data to be sent, obtain the data of the STA sent in this grouping, obtain the MU-MIMO data to be sent upgraded, adopt the groupID after changing, send the MU-MIMO data to be sent after upgrading in MU-MIMO mode to STA.
Such as, divide into groups in the present embodiment 1{A, D, E, G}, if AP proper reception of the CTS frame that website A and E replys, and do not receive the CTS frame of website D reply, then the outgoing data of the outgoing data of website E, F and M and website A can match by AP, namely this is to grouping 2{A, E, F, M} send MU-MIMO data.
Step 108:AP upgrades groupID and stream information, the groupID after renewal and stream information is write the respective field of physical layer overhead, and by the MAC Address of STA write corresponding data frame, AP sends MU-MIMO data to be sent to STA in MU-MIMO mode;
In the present embodiment, groupID is that { 000010}, stream information is that { 010,011,001,010}, instruction website A, E, F and M have 2 streams respectively, 3 streams, 1 stream and 2 data flow need to receive.Meanwhile, utilize MU-MIMO algorithm well known in the art, the outgoing data of A, E, F and M is sent, in the data of different website, carry the MAC Address of respective site, such as, in the data of website A, carry the MAC Address of website A.
AP can also start wait_ACK timer, and timing time is X*SIFS+X*ackDur, and wherein, SIFS is short interFrameGap, and calcDur is the time span that ACK sends, because have sent the data X=4 of four STA.
Step 109: the STA of correct receiving data frames sends ACK frame;
Step 110:AP judges, before wait_ACK timer expired, whether to receive ACK frame, before wait_ACK timer expired, if arbitrary primary user does not reply ACK frame, then performs step 113, otherwise, perform step 111;
Step 111:AP to judge before TXOP terminates whether also have follow-up data to send, if main or have subsequent segment to need to send from user, then performs step 107;
In the scheme adopting segment transmissions, following two seed scheme can be adopted:
Scheme one: allow the data of primary user to transmit with segmented mode, sends from the data of user in the mode of single bag, such as, in fig. 2, the data of website A transmit twice in the mode of segmentation, and the data of website E send twice in the mode of single bag, and the data of twice transmission are separate.Once the ACK of primary user for each segmentation correctly can not be received in segment transmissions, then perform step 112.
Scheme two: primary user with all allow transmit with segmented mode from the data of user, as long as STA has subsequent segment transmit in a packet, and corresponding ACK receives correctly, then execution step 107.
Step 112: terminate this and send.
Step 113: stop this and send.
Another embodiment of present embodiment is as follows: after AP gets and sends the send opportunity of data to the reception grouping determined, in the process sending MU-MIMO data, if send to the data of branch website in the middle part of this grouping to be sent, when sending to the data of another part website not also to be sent, AP can change grouping and send data, need to comprise the website that data also do not receive in grouping after change, i.e. above-mentioned another part website, AP sends data to the grouping after changing.Above-mentioned part website can be called the website finished receiving, and another part website can be called the website that reception does not complete.
Particularly, be sent sending to the data of branch website, grouping middle part, when sending to the data of another part website not also to be sent, AP can again from other groupings beyond this grouping, the website that selection can not complete with above reception carries out the website of MU-MIMO transmission and there are the data to be sent sending to selected website in AP, wherein, the website that selected website and reception do not complete needs to belong to same MU-MIMO and divides into groups, the groupID of this grouping is different from the groupID of former grouping, AP with the groupID after changing to selected website and the website transmission MU-MIMO data that do not finish receiving, and, the data flow according to sending above-mentioned selected website is needed to reconfigure stream information (stream information is variable).When access point sends data to the grouping after change, obtain the data of website in the grouping after sending to change, obtain current MU-MIMIO data to be sent, adopt the group of the grouping after changing to identify, send current data to be sent.Also can be sending to the data receiving branch website, grouping middle part to be sent, sending to the data of another part website not also to be sent, and when comprising one or more primary user in another part website, change and receive grouping.Access point can be the one or more data sectionals sending to the data of this website to the data that another part website is not also sent.
Except obtaining except send opportunity by transmission frame and response frame, time in the resident centralized control entity of AP, AP can also obtain send opportunity according to central controlled scheduling, as shown in Figure 3, AP obtains send opportunity by transmission frame and response frame, but obtains send opportunity according to central controlled scheduling.
A kind of data transmission system of Fig. 4 to be present embodiment be present embodiment, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at send opportunity acquisition module, if determine to there is the website not meeting condition of acceptance in this grouping, then change the MU-MIMO grouping that will receive data;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, for sending data to the grouping after change.
When grouping determination module changes the MU-MIMO grouping that will receive data, selection to receive data MU-MIMO grouping beyond grouping as change after grouping, wherein, comprise in selected grouping in the MU-MIMO grouping that will receive data and meet the website of condition of acceptance and newly-increased website, and there are the data sending to newly-increased website in access point.
The above-mentioned website not meeting condition of acceptance is that after send opportunity acquisition module sends transmission frame to the website in the MU-MIMO grouping that will receive data in the process obtaining send opportunity, this send opportunity acquisition module does not receive the website of the response frame that it sends.
When data transmission blocks sends data to the grouping after change, obtain the data of website in the grouping after sending to change, obtain current MU-MIMIO data to be sent, adopt the group mark of the grouping after changing, for the data sent to primary user in the grouping after change, send in the mode of segmentation, in this grouping from the data that user sends, send in the mode of single bag; Or, for primary user in the grouping after change and the data from user's transmission, all send in the mode of segmentation.
The another kind of data transmission system of present embodiment, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at send opportunity acquisition module, if determining to exist in this grouping does not meet the website of condition of acceptance, then this is not met stream information corresponding to the website of condition of acceptance be configured to invalid;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, sends data for the website meeting condition of acceptance in this grouping.
When data transmission blocks meets the website transmission data of condition of acceptance in grouping, increase in the data issuing the website meeting condition of acceptance or reduce data flow, and correspondingly revising stream information, to represent the quantity of the data flow that website receives.
The third data transmission system of present embodiment, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will send data, the send opportunity sending data to this grouping is got at send opportunity acquisition module, data transmission blocks is determined to be sent in the data of branch website in the middle part of this grouping, when data to another part website are not also sent, change grouping, wherein, in the grouping after change, comprise another part website;
Send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Data transmission blocks, for sending data to the grouping after change.
Grouping determination module sends to the data of branch website in the middle part of this grouping to be sent in data transmission blocks, when sending to the data of another part website not also to be sent, and if when comprising one or more primary user in another part website, change grouping.
Data transmission blocks sends data to the grouping after change and comprises: access point obtains the data of website in the grouping after sending to change, obtains current MU-MIMIO data to be sent, adopts the group of the grouping after changing to identify, sends current data to be sent.
Data transmission blocks is the one or more data sectionals sent in the data of this website to the data that another part website is not also sent.
Although be described in detail the method for counting of MU-MIMO data re-transmission in a kind of WLAN (wireless local area network) of the present invention by some exemplary embodiments above, but these embodiments above are not exhaustive, and those skilled in the art can realize variations and modifications within the spirit and scope of the present invention.Therefore, the present invention is not limited to these embodiments, and scope of the present invention is only as the criterion by claims.
Claims (19)
1. a data transmission method, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain the send opportunity sending data to this grouping, in the process obtaining send opportunity, if there is the website not meeting condition of acceptance in this grouping, will receive the MU-MIMO grouping of data described in then changing, the grouping after changing sends data;
Wherein, the MU-MIMO grouping that will receive data described in described access point change comprises:
Described access point select the described MU-MIMO that will receive data divide into groups beyond grouping as the grouping after described change, wherein, comprise described will reception in the MU-MIMO grouping of data in selected grouping and meet the website of condition of acceptance and newly-increased website, and there are the data sending to described newly-increased website in described access point.
2. the method for claim 1, it is characterized in that: described in do not meet condition of acceptance website be that after described access point sends transmission frame to the described website that will receive in the MU-MIMO grouping of data in the process obtaining send opportunity, this access point does not receive the website of the response frame that it sends.
3. the method for claim 1, is characterized in that, described access point determines that the MU-MIMO grouping that will receive data comprises:
Described access point determines primary user, selects to comprise the maximum grouping of primary user and divide into groups as the MU-MIMO of described reception data from the MU-MIMO grouping configured.
4. method as claimed in claim 3, it is characterized in that: described access point the described primary user of comprising maximum be grouped into multiple time, from the plurality of grouping, select to comprise the highest the dividing into groups from MU-MIMO as described reception data of the grouping of user of dispatching priority.
5. method as claimed in claim 3, it is characterized in that: described access point is in the process obtaining send opportunity, if there is the website not meeting condition of acceptance in this grouping, and meet in the website of condition of acceptance and comprise one or more primary user, then change the described MU-MIMO that will receive data and divide into groups.
6. method as claimed in claim 5, is characterized in that, described access point sends data to the grouping after change and comprises:
Described access point obtains the data of website in the grouping after sending to described change, obtains current MU-MIMIO data to be sent, adopts the group of the grouping after described change to identify, send described current data to be sent.
7. method as claimed in claim 6, it is characterized in that, when described access point sends described current data to be sent, for the data sent to primary user in the grouping after described change, send in the mode of segmentation, for in this grouping from the data that user sends, send in the mode of single bag; Or, for primary user in the grouping after described change and the data from user's transmission, all send in the mode of segmentation.
8. a data transmission method, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain the send opportunity sending data to this grouping, in the process obtaining send opportunity, if there is the website not meeting condition of acceptance in this grouping, then this not being met stream information corresponding to the website of condition of acceptance is configured to invalid, and the website meeting condition of acceptance in this grouping sends data.
9. method as claimed in claim 8, it is characterized in that, when the website that described access point meets condition of acceptance in the described MU-MIMO grouping that will receive data sends data, increase in the data of website meeting condition of acceptance described in issuing or reduce data flow, and correspondingly revise stream information, to represent the quantity of the data flow that website receives.
10. a data transmission method, comprising:
Access point determines multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will send data, getting after the send opportunity of this grouping transmission data, be sent in the data of branch website in the middle part of this grouping, when data to another part website are not also sent, change described grouping, wherein, comprise described another part website in the grouping after change, the grouping after changing sends data.
11. methods as claimed in claim 10, it is characterized in that: described access point is sent sending to the data of branch website in the middle part of this grouping, when sending to the data of another part website not also to be sent, if comprise one or more primary user in described another part website, then change described grouping.
12. methods as claimed in claim 11, is characterized in that, described access point sends data to the grouping after change and comprises:
Described access point obtains the data of website in the grouping after sending to described change, obtains current MU-MIMIO data to be sent, adopts the group of the grouping after described change to identify, send described current data to be sent.
13. methods as claimed in claim 10, is characterized in that, described access point is the one or more data sectionals sent in the data of this website to the data that described another part website is not also sent.
14. 1 kinds of data transmission systems, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Described grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at described send opportunity acquisition module, if determine to there is the website not meeting condition of acceptance in this grouping, then to receive the MU-MIMO grouping of data described in changing;
Described send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Described data transmission blocks, for sending data to the grouping after change;
Wherein, when will receive the MU-MIMO grouping of data described in described grouping determination module changes, select the described MU-MIMO that will receive data divide into groups beyond grouping as the grouping after described change, wherein, comprise described will reception in the MU-MIMO grouping of data in selected grouping and meet the website of condition of acceptance and newly-increased website, and there are the data sending to described newly-increased website in access point.
15. systems as claimed in claim 14, it is characterized in that: described in do not meet condition of acceptance website be that after described send opportunity acquisition module sends transmission frame to the described website that will receive in the MU-MIMO grouping of data in the process obtaining send opportunity, this send opportunity acquisition module does not receive the website of the response frame that it sends.
16. systems as claimed in claim 14, it is characterized in that, when described data transmission blocks sends data to the grouping after change, obtain the data of website in the grouping after sending to described change, obtain current MU-MIMIO data to be sent, adopt the group of the grouping after described change to identify, for the data sent to primary user in the grouping after described change, send in the mode of segmentation, in this grouping from the data that user sends, send in the mode of single bag; Or, for primary user in the grouping after described change and the data from user's transmission, all send in the mode of segmentation.
17. 1 kinds of data transmission systems, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Described grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will receive data, obtain in the process of send opportunity at described send opportunity acquisition module, if determining to exist in this grouping does not meet the website of condition of acceptance, then this is not met stream information corresponding to the website of condition of acceptance be configured to invalid;
Described send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Described data transmission blocks, sends data for the website meeting condition of acceptance in this grouping.
18. systems as claimed in claim 17, it is characterized in that, when described data transmission blocks meets the website transmission data of condition of acceptance in described grouping, increase in the data of website meeting condition of acceptance described in issuing or reduce data flow, and correspondingly revise stream information, to represent the quantity of the data flow that website receives.
19. 1 kinds of data transmission systems, comprising: grouping determination module, send opportunity acquisition module and data transmission blocks, wherein:
Described grouping determination module, for determining multi-user-multiple-input and multiple-output (MU-MIMO) grouping that will send data, the send opportunity sending data to this grouping is got at described send opportunity acquisition module, described data transmission blocks is determined to be sent in the data of branch website in the middle part of this grouping, when data to another part website are not also sent, change described grouping, wherein, in the grouping after change, comprise described another part website;
Described send opportunity acquisition module, for obtaining the send opportunity sending data to this grouping;
Described data transmission blocks, for sending data to the grouping after change.
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| US10285187B2 (en) * | 2015-05-05 | 2019-05-07 | Qualcomm Incorporated | Methods and apparatus for multiple user uplink |
| CN114364052A (en) | 2016-08-25 | 2022-04-15 | 华为技术有限公司 | Data communication method and device |
| AU2017390890B2 (en) * | 2017-01-06 | 2021-04-01 | Sony Corporation | Communication device and communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717900A (en) * | 2002-10-25 | 2006-01-04 | 高通股份有限公司 | MIMO WLAN system |
| CN101034923A (en) * | 2006-03-07 | 2007-09-12 | 松下电器产业株式会社 | Packet scheduling method and system for multi-antenna radio communication system |
| CN101385299A (en) * | 2006-02-09 | 2009-03-11 | 三星电子株式会社 | Method and system for scheduling users based on user-determined ranks in a mimo system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717900A (en) * | 2002-10-25 | 2006-01-04 | 高通股份有限公司 | MIMO WLAN system |
| CN101385299A (en) * | 2006-02-09 | 2009-03-11 | 三星电子株式会社 | Method and system for scheduling users based on user-determined ranks in a mimo system |
| CN101034923A (en) * | 2006-03-07 | 2007-09-12 | 松下电器产业株式会社 | Packet scheduling method and system for multi-antenna radio communication system |
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