CN104852777B

CN104852777B - Multiple target convergence transmission method and relevant device and system

Info

Publication number: CN104852777B
Application number: CN201410052524.5A
Authority: CN
Inventors: 杜振国; 树贵明
Original assignee: Huawei Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2014-02-14
Filing date: 2014-02-14
Publication date: 2018-08-21
Anticipated expiration: 2034-02-14
Also published as: CN104852777A

Abstract

The invention discloses a kind of multiple target convergence transmission method and relevant device and systems, to solve the technical issues of existing aggregation transfer technology is only applicable to a receiving terminal.In some of the invention feasible embodiments, the method be used for include an access point AP and at least two site STAs system；The method includes：The downlink data of multiple STA at least two STA is polymerized to a multiple target aggregate data frame；The multiple target aggregate data frame is sent to the multiple STA, so that each STA in the multiple STA detects one's own downlink data from the multiple target aggregate data frame.

Description

Multiple target convergence transmission method and relevant device and system

Technical field

The present invention relates to fields of communication technology, and in particular to a kind of multiple target convergence transmission method and relevant device and is System.

Background technology

802.11n is as a kind of wireless transmission standards agreement, it is proposed that a kind of aggregation transfer technology, that is, A （Aggregate, polymerization）-MPDU（MAC（Medium Access Control, media access control）Protocol Data Unit, Medium Access Control (MAC) Protocol Data Unit）Mechanism.

The PPDU of A-MPDU（PLCP（Physical layer convergence procedure, physical layer convergence mistake Journey）Protocol data unit, PLCP protocol Data Units）Structure is as shown in Figure 1, its physical header part includes targeting sequencing （Preamble）With the heads PLCP（header）, a position in wherein PLCP header indicates that the PPDU is A-MPDU；Its The parts MAC may include that multiple subframes, each subframe include MPDU delimiters, MPDU and Pad（Filler）；In MPDU delimiters Including：1）MPDU Length：The length of MPDU in current subframe；2）CRC（Cyclic redundancy code, cyclic redundancy Verification）：CRC check is carried out to MPDU Length and Reserved fields；3）Delimiter Signature（Delimiter mark Label）：Perseverance is 0X4.When some sub-frame transmission mistake, the start bit of next subframe can be determined by detecting this delimiter It sets, be unlikely to leads to other subframes because of a subframe error of transmission to be properly received.

Wherein, the MPDU RA having the same for including in all subframes in an A-MPDU（Receiver Address, Receiving terminal address）Domain and TA（Transmitter Address, transmitting terminal address）Domain, that is, all MPDU in same A-MPDU Reception MAC Address having the same and transmission MAC Address, therefore, an A-MPDU is only applicable to a receiving terminal.

In addition, 802.11ad also proposed a kind of A-PPDU mechanism, it is continuous for multiple PPDU with identical RA and TA It transmits, the targeting sequencing of interframe space and the latter PPDU can be saved between two neighboring PPDU, transmission is saved to reach The purpose of expense.But an A-PPDU is also only applicable to a receiving terminal.

Invention content

A kind of multiple target convergence transmission method of offer of the embodiment of the present invention and relevant device and system, it is existing poly- to solve Close the technical issues of transmission technology is only applicable to a receiving terminal.

First aspect present invention provides a kind of multiple target convergence transmission method, for including an access point AP and at least two The system of a site STA；The method includes：The downlink data of multiple STA at least two STA is polymerized to one Multiple target aggregate data frame；The multiple target aggregate data frame is sent to the multiple STA, so as in the multiple STA Each STA detects one's own downlink data from the multiple target aggregate data frame.

In the first possible implementation, the downlink data by multiple STA is polymerized to a multiple target polymerization Further include before data frame：According at least one of Modulation and Coding Scheme MCS, reception antenna number and physical location factor, At least two STA is divided into N number of grouping, N is the positive integer more than or equal to 1, wherein each grouping includes at least two A STA；Correspondingly, the downlink data by multiple STA is polymerized to a multiple target aggregate data frame includes：By same grouping In the downlink data of multiple STA be polymerized to a multiple target aggregate data frame.

The possible realization method of with reference to first aspect the first, in second of possible realization method, it is described will be same The downlink data of multiple STA in one grouping is polymerized to before a multiple target aggregate data frame：For each grouping point Combo identifies, and is each STA Allotment Serial Numbers in each grouping；It will be in the group mark of the first grouping and first grouping The serial number of each STA, carries in group identification notification frame, each STA being sent in first grouping；First grouping It is any grouping in N number of grouping.

Second of possible realization method with reference to first aspect, in the third possible realization method, it is described will be same The downlink data of multiple STA in one grouping is polymerized to a multiple target aggregate data frame and includes：To in first grouping When multiple STA carry out downlink transfer, the downlink data of multiple STA in first grouping is polymerized to a multiple target polymerization Data frame, the multiple target aggregate data frame include：Targeting sequencing, the heads physical layer convergence procedure PLCP, media access control MAC header and subframe part；Wherein, the heads PLCP include being used to indicate affiliated data frame as multiple target aggregated data The indicating bit of frame；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, present frame interaction The remaining time of sequence and cyclic redundancy check code CRC；The subframe part includes corresponding to the multiple of the multiple STA Subframe, the subframe include the downlink data of corresponding STA.

The possible realization method of with reference to first aspect the first, in the 4th kind of possible realization method, it is described will be same The downlink data of multiple STA in one grouping is polymerized to a multiple target aggregate data frame and includes：To multiple in second packet When STA carries out downlink transfer, the downlink data of multiple STA in the second packet is polymerized to a multiple target aggregated data Frame, the multiple target aggregate data frame include：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, described The heads PLCP include being used to indicate the indicating bit that affiliated data frame is multiple target aggregate data frame, and the MAC header includes： Transmitting terminal address, the number of the multiple STA, the association identification AID lists of the multiple STA, present frame interaction sequence remain Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, described Subframe includes the downlink data of corresponding STA；The second packet is any grouping in N number of grouping.

The third or the 4th kind of possible realization method with reference to first aspect, in the 5th kind of possible realization method, The subframe includes：Media access control protocol data unit MPDU delimiters, MPDU and filler PAD；The MPDU is not Including indicating the domains address1 of receiving terminal address and indicating the domains address2 of transmitting terminal address, but include the AID of corresponding STA The domains AID.

The 5th kind of possible realization method with reference to first aspect, in the 6th kind of possible realization method, more mesh The last one subframe marked in aggregate data frame includes Resource Allocation Frame, confirms the specific of response for indicating that each STA is sent Running time-frequency resource.

Second aspect of the present invention provides a kind of multiple target convergence transmission method, for including an access point AP and at least two The system of a site STA；The method includes：First STA receives the multiple target aggregate data frame that the AP is sent, more mesh Mark aggregate data frame includes the downlink data of multiple STA at least two STA, and the first STA is described at least two Any of a STA；First STA detects one's own downlink data from the multiple target aggregate data frame.

In the first possible implementation, the first STA receives the multiple target aggregate data frame that the AP is sent Further include before：First STA receives the group identification notification frame that the AP is sent, carried in described group of identification notification frame described in The serial number of the group mark and the first STA of the first grouping belonging to first STA.

In conjunction with the first possible realization method of second aspect, in second of possible realization method, more mesh Marking aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include referring to Show position；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, present frame interaction sequence Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, institute State the downlink data that subframe includes corresponding STA；First STA is detected from the multiple target aggregate data frame to be belonged to certainly Oneself downlink data includes：First STA according to the indicating bit in the heads PLCP in the multiple target aggregate data frame received, The data frame acknowledged receipt of is multiple target aggregate data frame, and confirms that therein group of mark is the group mark of first grouping Afterwards, judge in the multiple target aggregate data frame whether to include corresponding to described first according to the serial number position table of the multiple STA The subframe of STA detects the subframe corresponding to the first STA, and from corresponding to described if including from the subframe part The downlink data of the first STA is detected in the subframe of first STA.

In conjunction with second aspect, in the third possible realization method, the multiple target aggregate data frame includes：Leading sequence Row, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include indicating bit, and the MAC header includes： Transmitting terminal address, the number of the multiple STA, the association identification AID lists of the multiple STA, present frame interaction sequence remain Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, described Subframe includes the downlink data of corresponding STA；First STA is detected to one's name from the multiple target aggregate data frame Downlink data include：First STA is according to the indicating bit in the heads PLCP in the multiple target aggregate data frame received, really The data frame acknowledged receipt of is multiple target aggregate data frame, and judges that the multiple target polymerize according to the AID lists of the multiple STA Whether include the subframe for corresponding to the first STA in data frame, if including, detection is corresponding to institute from the subframe part The subframe of the first STA is stated, and detects the downlink data of the first STA from the subframe corresponding to the first STA.

In conjunction with second of second aspect or the third possible realization method, in the 4th kind of possible realization method, The subframe includes：MPDU delimiters, MPDU and filler PAD；The MPDU does not include indicating receiving terminal address The domains address1 and the domains address2 for indicating transmitting terminal address, but include the domains AID of the AID of corresponding STA.

In conjunction with the 4th kind of possible realization method of second aspect, in the 5th kind of possible realization method, more mesh The last one subframe marked in aggregate data frame includes Resource Allocation Frame, confirms the specific of response for indicating that each STA is sent Running time-frequency resource.

Third aspect present invention provides a kind of access point AP, for a kind of including described access point AP and at least two websites The system of STA；Described access point AP includes：Aggregation module is used for the lower line number of multiple STA at least two STA According to being polymerized to a multiple target aggregate data frame；Sending module is described more for the multiple target aggregate data frame to be sent to A STA, so that each STA in the multiple STA detects one's own lower line number from the multiple target aggregate data frame According to.

In the first possible implementation, described access point AP further includes：Grouping module, for according to modulating-coding At least two STA is divided into N number of point by least one of scheme MCS, reception antenna number and physical location factor Group, N are the positive integer more than or equal to 1, wherein each grouping includes at least two STA；Correspondingly, the sending module, tool Body is used to the downlink data of multiple STA in same grouping being polymerized to a multiple target aggregate data frame.

In conjunction with the first possible realization method of the third aspect, in second of possible realization method, the grouping Module is additionally operable to identify for each grouping distribution group, and is each STA Allotment Serial Numbers in each grouping；The sending module, It is additionally operable to carry the serial number of each STA in the group mark of the first grouping and first grouping in group identification notification frame, The each STA being sent in first grouping；First grouping is any grouping in N number of grouping.

In conjunction with second of possible realization method of the third aspect, in the third possible realization method, the polymerization Module will be multiple in first grouping when being specifically used for carrying out downlink transfer to multiple STA in first grouping The downlink data of STA is polymerized to a multiple target aggregate data frame, and the multiple target aggregate data frame includes：Targeting sequencing, object Manage the heads layer aggregation procedure PLCP, media access control MAC head and subframe part；Wherein, the heads PLCP include being used for Data frame belonging to indicating is the indicating bit of multiple target aggregate data frame；The MAC header includes：Transmitting terminal address, group mark, The serial number position table of the multiple STA, the remaining time of present frame interaction sequence and cyclic redundancy check code CRC；The subframe Part includes multiple subframes corresponding to the multiple STA, and the subframe includes the downlink data of corresponding STA.

In conjunction with the first possible realization method of the third aspect, in the 4th kind of possible realization method, the polymerization Module, when being specifically used for carrying out downlink transfer to multiple STA in second packet, by multiple STA's in the second packet Downlink data is polymerized to a multiple target aggregate data frame, and the multiple target aggregate data frame includes：Targeting sequencing, PLCP heads Portion, MAC header and subframe part；Wherein, the heads PLCP include be used to indicate belonging to data frame be multiple target polymerization The indicating bit of data frame, the MAC header include：Transmitting terminal address, the number of the multiple STA, the association of the multiple STA Identify AID lists, the remaining time of present frame interaction sequence and cyclic redundancy check code CRC；The subframe part includes pair Should include the downlink data of corresponding STA in multiple subframes of the multiple STA, the subframe；The second packet is institute State any grouping in N number of grouping.

Fourth aspect present invention provides a kind of site STA, for a kind of including described in an access point AP and at least two The system of site STA；The STA includes：Receiving module, the multiple target aggregate data frame sent for receiving the AP are described Multiple target aggregate data frame includes the downlink data of multiple STA at least two STA, the first STA be it is described extremely Any of few two STA；Detection module detects from the multiple target aggregate data frame for the first STA and belongs to The downlink data of oneself.

In the first possible implementation, the receiving module is additionally operable to receive the group that the AP is sent and identify to lead to Know frame, the sequence of the group mark and the first STA of the first grouping belonging to the first STA is carried in described group of identification notification frame Number.

In conjunction with the first possible realization method of fourth aspect, in second of possible realization method, more mesh Marking aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include referring to Show position；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, present frame interaction sequence Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, institute State the downlink data that subframe includes corresponding STA；The detection module, specifically for according to the multiple target aggregated data received The indicating bit in the heads PLCP in frame, the data frame acknowledged receipt of are multiple target aggregate data frames, and confirm therein group of mark Knowledge is after the group of first grouping identifies, to judge the multiple target aggregate data frame according to the serial number position table of the multiple STA In whether include subframe corresponding to the first STA, if including, from the subframe part detection correspond to described first The subframe of STA, and detect from the subframe corresponding to the first STA downlink data of the first STA.

In conjunction with fourth aspect, in the third possible realization method, the multiple target aggregate data frame includes：Leading sequence Row, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include indicating bit, and the MAC header includes： Transmitting terminal address, the number of the multiple STA, the association identification AID lists of the multiple STA, present frame interaction sequence remain Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, described Subframe includes the downlink data of corresponding STA；The detection module, specifically for according to the multiple target aggregate data frame received In the heads PLCP in indicating bit, the data frame acknowledged receipt of is multiple target aggregate data frame, and according to the multiple STA's Whether AID lists judge in the multiple target aggregate data frame to include the subframe for corresponding to the first STA, if including, from Detection corresponds to the subframe of the first STA in the subframe part, and detects institute from the subframe corresponding to the first STA State the downlink data of the first STA.

Fifth aspect present invention provides a kind of multiple target aggregation transfer system, including：One such as third aspect present invention institute The access point AP stated, and, at least two site STAs described in fourth aspect present invention.

Therefore the embodiment of the present invention uses the downlink data of multiple STA being polymerized to a multiple target aggregated data Frame carries out the technical solution of downlink transfer, achieves following technique effect：For multiple STA in same grouping, phase can be used Same emission parameter, without frequently adjustment emission parameter；By the way that the downlink data of multiple STA of same grouping is polymerized to one Multiple target aggregate data frame, it is possible to reduce header overhead improves efficiency of transmission to save empty overhead.

Description of the drawings

Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to institute in embodiment and description of the prior art Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is the schematic diagram of the frame structure of the PPDU of A-MPDU；

Fig. 2 is a kind of schematic diagram of multiple target convergence transmission method provided in an embodiment of the present invention；

Fig. 3 is by the schematic diagram of an AP and multiple STA the WiFi network system constituted；

Fig. 4 is the frame structure schematic diagram of MD-A-MPDU in the case of explicit grouping of the present invention；

Fig. 5 is the schematic diagram of the new information element Group element designed in the present invention；

Fig. 6 is the frame structure schematic diagram of subframe in MD-A-MPDU；

Fig. 7 is the frame structure schematic diagram of MD-A-MPDU in the case of implicit packet of the present invention；

Fig. 8 a and 8b are the structural schematic diagram of two kinds of AID List respectively；

Fig. 8 c are the schematic diagrames of the control bit of AID List；

Fig. 9 is the frame structure schematic diagram for the A-MSDU subframes that the parts Frame Body include；

Figure 10 is the schematic diagram of another multiple target convergence transmission method provided in an embodiment of the present invention；

Figure 11 is the schematic diagram of AP provided in an embodiment of the present invention a kind of；

Figure 12 is the schematic diagram of STA provided in an embodiment of the present invention a kind of；

Figure 13 is a kind of schematic diagram of multiple target aggregation transfer system provided in an embodiment of the present invention；

Figure 14 is the frame structure schematic diagram of two kinds of PPDU in 802.11n；

Figure 15 is the frame structure schematic diagram of the PPDU in 802.11ac.

Specific implementation mode

In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects It encloses.

Below by specific embodiment, it is described in detail respectively.

Referring to FIG. 2, the embodiment of the present invention provides a kind of multiple target convergence transmission method, this method connects for including one Access point（Access Point, AP）With at least two websites（Station, STA）System, such as WiFi network system.It is above-mentioned Multiple target convergence transmission method may include：

At least two STA is divided into N number of grouping in advance, N is the positive integer more than or equal to 1, wherein each point Group includes at least two STA.

In next-generation WiFi, equipment dense distribution is an important scene.Assuming that AP establishes pass with many STA Connection.When AP sends downlink data, if the selection of transmitting target is to randomly select, AP need to frequently adjust emission parameter, such as send out Penetrate power, Modulation and Coding Scheme（Modulation and Coding Scheme, MCS）, beam forming（Beamforming）Ginseng Number etc., because being required for different emission parameters for each STA.

In practical application scene, the distribution of user often and non-uniform Distribution, but shows certain hot spot aggregation Characteristic.In this way, if geographical location approached, the equipment for receiving characteristic close is divided into a grouping, and each downlinks of AP pass The defeated STA equipment for being directed to a grouping carries out；Then, for the STA equipment in a grouping, AP is using identical emission parameter Can, without frequently adjusting emission parameter.

For this purpose, the present invention proposes that one kind can be described as MD-A-MPDU（Multi-Destination A-MPDU, multiple target A- MPDU）Technical solution.The basic thought of technical solution of the present invention is：As shown in figure 3, being constituted by an AP and multiple STA WiFi network system in, STA is grouped according to characteristic and/or physical location is received, will wherein receive characteristic close or Multiple STA similar in identical, physical location points are one group；When AP carries out downlink transfer, it will belong to multiple STA's of same grouping Downlink data, which is aggregating, to be transmitted, in this way, can avoid AP frequently adjusts emission parameter, and since aggregation transfer can subtract Few header overhead, so as to improve efficiency of transmission.

For example, not considering multiple antennas, then MCS is STA primary recipient parameters, can be by Modulation and Coding Scheme（MCS）It is identical At least two STA point be one group.If alternatively, consider Beamforming, can also be identical by MCS, and/or, reception antenna number It is identical, and/or, at least two STA that physical location closes on points are one group；AP can be according to the channel square between each STA and AP in group Battle array COMPREHENSIVE CALCULATING goes out downlink and is oriented to matrix（Steering Matrix）, then the guiding matrix is used to carry out downlink transfer.It is other In embodiment, other packet modes can also be used.It preferably, can be according in MCS, reception antenna number and physical location At least two STA is divided into N number of grouping by least one factor.

110, the downlink data of multiple STA at least two STA is polymerized to a multiple target aggregate data frame.

When AP carries out downlink transfer, the data aggregate for the multiple STA for belonging to same grouping is got up to be transmitted, that is, needle Identical emission parameter is used to same group of multiple STA, in this way, can avoid AP frequently adjusts emission parameter；Also, due to poly- Header overhead can be reduced by closing transmission, so as to improve efficiency of transmission.Described multiple STA at least two herein, can be with It is whole STA in a grouping, can also be the part STA in a grouping.

The multiple target aggregate data frame obtained after polymerization includes multiple subframes, wherein each subframe corresponds to a STA； In the same multiple target aggregate data frame, different subframes can correspond to different STA, can also correspond to identical STA, but, at least Different STA is corresponded respectively to there are two subframe.Corresponding in the subframe of each STA, including belong to the downlink data of the STA.

120, the multiple target aggregate data frame is sent to the multiple STA, so as to each of the multiple STA STA detects one's own downlink data from the multiple target aggregate data frame.

After STA receives multiple target aggregate data frame, if the multiple target aggregate data frame includes belonging under the STA Row data, then the STA can be from wherein extracting one's own downlink data；If not including belonging in the multiple target aggregate data frame In the downlink data of the STA, then the STA can drop the multiple target aggregate data frame.

In the embodiment of the present invention, the above-mentioned grouping carried out to STA may include two kinds of packet modes, one is explicit grouping, Another kind is implicit packet.Can be that multiple target aggregate data frame designs different frame formats for different packet modes.Under Face is described in detail respectively.

In one embodiment of the present invention, explicit grouping management can be carried out to STA.

Explicit grouping management, that is, equipment is clearly classified as to a certain group, it is indicated that the mark organized belonging to equipment.This grouping pipe The shortcomings that reason mode is need to pass through explicit message（Such as management frame）Group is safeguarded, certain administration overhead is expended.For example, when setting When standby mobile, characteristic is received（Such as MCS）It may change, therefore the group being grouped belonging to STA mark etc. need to be changed by signaling Information.But since WiFi is mainly used for low speed and static scene, this grouping variation is general and infrequently, therefore is that can receive 's.The advantages of explicit grouping way to manage is that mark can be used group to indicate one group of equipment, therefore MD-A- in actual use The reception target device of MPDU can be indicated with shorter field.

In present embodiment, it may also include before above-mentioned steps 110：For wherein each grouping distribution group identifies, and it is every Each STA Allotment Serial Numbers in a grouping；The serial number of each STA during the group mark of first grouping and described first are grouped, It carries in group identification notification frame, each STA being sent in first grouping；First grouping is N number of grouping In any grouping.

Correspondingly, step 110 can specifically include：It, will when carrying out downlink transfer to multiple STA in first grouping The downlink data of multiple STA in first grouping is polymerized to a multiple target aggregate data frame, the multiple target aggregate number Include according to frame：Targeting sequencing, physical layer convergence procedure（Physical layer convergence procedure, PLCP）Head Portion, media access control（MAC）Head and subframe part；Wherein, the heads PLCP include being used to indicate affiliated data frame For the indicating bit of multiple target aggregate data frame；The MAC header includes：Transmitting terminal address, group mark, the sequence of the multiple STA Number position table, the remaining time of present frame interaction sequence and cyclic redundancy check code（Cyclic redundancy code, CRC）；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes under corresponding STA Row data.The remaining time of the present frame interaction sequence does not include the further part of present frame, but is transmitted from present frame End starts to count, including subsequent transmission frame time, interframe space, response frame transmission time etc..

In the following, in conjunction with frame structure shown in the drawings, it is further illustrated：

As shown in figure 4, be the PPDU of present embodiment MD-A-MPDU, i.e., the frame knot of multiple target aggregate data frame above-mentioned Structure, physics head include：Targeting sequencing（Preamble）With the heads PLCP（header）, wherein PLCP header include One indicating bit, be used to indicate the PPDU be MD-A-MPDU, the indicating bit be located at PLCP header the domains Signal or In the domains SERVICE；The parts its MAC include MAC header（That is, MD-A-MPDU header）With multiple subframes（That is, MD-A-MPDU Subframe）.

Compared with the PPDU of A-MPDU shown in FIG. 1, a main distinction is the increase in MAC header.As shown in Figure 4, MAC header includes following multiple domains：

TA（Transmitter Address, transmitting terminal address）：Indicate transmitting terminal MAC Address, for downlink transfer, i.e., The MAC Address of AP（BSSID）.

Group ID（Group mark）：Indicate the group mark of targeted grouping.

Index Bitmap（Serial number position table）：Indicate the serial number position tables of the reception STA of this aggregation transfer in a packet, In, it needs the corresponding position of serial number for receiving the STA of downlink data that can be indicated with 1, the sequence of the STA of downlink data need not be received Number corresponding position can be indicated with 0.

Length/Duration（Length or duration）：Indicate the remaining time of present frame interaction sequence.

CRC（Cyclic redundancy code, cyclic redundancy check code）：For carrying out CRC check to MAC header.

It may include multiple STA in one grouping, in a MD-A-MPDU is transmitted, the whole in being grouped may be directed to STA, it is also possible to for the part STA in grouping.Therefore, each STA in group can be given to distribute a serial number（Index）, often A STA can be used（Group ID, Index）Carry out unique mark.The serial number for once transmitting targeted multiple STA equipments can be with Bitmap forms indicate that the corresponding Bit of serial number indicates the data for including the STA in this MD-A-MPDU for 1, is not wrapped if 0 expression Data containing the STA.For example, Bitmap is 10010, then it represents that this MD-A-MPDU includes the STA and serial number 5 of serial number 1 STA downlink data, it is also possible to indicate the corresponding subframes of STA in the position of subframe part, example using numeric order Such as, 10010 Bitmap, subframe part include two subframes, then, the 1st subframe corresponds to the STA of serial number 1, the 2nd son Frame corresponds to the STA of serial number 5.

For explicit grouping management, AP need to preassign the mark of the group belonging to STA（Group ID）And serial number（Index）, New information element Group element can be designed, as shown in Figure 5.The frame type that AP and STA are interacted include control frame, Management frame and data frame are a variety of.Including a group mark（Group ID）And serial number（Index）Deng information element Group element It may include being sent to STA in management frame such as group identification notification frame, in concrete application, may include in Association In Response frames or Probe Response frames, it is also possible to other management frame carryings, the Action management frames such as newly defined.

When STA receives a MD-A-MPDU from its associated AP（That is, the multiple target aggregate data frame）When, it can Check whether the Group ID in MAC header are identical as oneself affiliated group mark being grouped, if it is different, the frame is then abandoned, and Suspend mode in time indicated by the domains Length/Duration；If identical, the serial number pair of oneself in the domains Index Bitmap is checked Answer whether position is 1；If not 1, then abandon the frame, and suspend mode in the time indicated by the domains Length/Duration；If 1, The frame subsequent subframe part is then received, and therefrom detection corresponds to the subframe of the STA, to obtain the MPDU of oneself.

As shown in fig. 6, being the frame structure schematic diagram for the subframe that subframe part includes in MD-A-MPDU.The subframe Including：Media access control protocol data unit（MPDU）Delimiter（MPDU Delimiter）, MPDU and filler （PAD）For three parts；Wherein：

MPDU delimiter portions include：The parts such as Reserved, Length, CRC, Delimiter Signature, with figure The MPDU delimiter portions of PPDU are identical in A-MPDU shown in 1.PAD is a filler, generally 0~3 byte, for making this The frame length of subframe is the integral multiple of 4 bytes, facilitates physical treatment, the MPDU delimiters portion with PPDU in A-MPDU shown in Fig. 1 Split-phase is same.

MPDU has done some simplification compared with the MPDU of PPDU in A-MPDU shown in Fig. 1 in MD-A-MPDU as shown in Figure 6, Its difference includes mainly：

MPDU does not include the domains address1 and the expression transmitting terminal address for indicating receiving terminal address in technical solution of the present invention The domains address2, but include the domains AID of the AID of corresponding STA.This is because：Address2 domain representation transmitting terminals address（TA）, Include in the domains TA of MAC header, therefore can remove；Address1 domain representation receiving terminals address（RA）, i.e. target STA's MAC Address in technical solution of the present invention, is substituted with the domains AID.The association identification with AP of AID domain representation targets STA.Also, this In the MPDU of inventive technique scheme, indicate that the domains Duration/ID of present frame interaction sequence remaining time have passed through MAC header Length/Duration it is implicit indicate, therefore, the domains Duration/ID in MPDU can be cancelled, and in the Duration/ID The position in domain and the domains address1, instead domains AID.

It should be noted that the MPDU frame types that different subframes include in same MD-A-MPDU（Such as data frame/control Frame/management frame）It can be different.Each MPDU is in addition to without the domains Address1 and the domains Address2, if visual comprising other domains Depending on concrete condition.For example, can be free of the domains Address4 in management frame, HT Control are can be free of in the frame in addition to+HTC frames Domain can be free of domains QoS Control, etc. in non-QoS frame.

More than, explicit grouping management is illustrated.

It, can be to the implicit packet management of STA progress in another embodiment of the present invention.

Implicit packet management, that is, AP is not grouped association STA clearly, but when sending MD-A-MPDU by target STA identification lists directly carry in multiple target aggregate data frame.In the case of implicit packet, the PPDU of MD-A-MPDU designs lattice Formula generally with explicit grouping when it is identical, but particular content in MAC header is different.

In present embodiment, step 110 can specifically include：When carrying out downlink transfer to multiple STA in second packet, The downlink data of multiple STA in the second packet is polymerized to a multiple target aggregate data frame, the multiple target polymerization Data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include for referring to Data frame belonging to showing is the indicating bit of multiple target aggregate data frame, and the MAC header includes：Transmitting terminal address, it is the multiple The number of STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence and cyclic redundancy Check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes corresponding STA Downlink data；The second packet is any grouping in N number of grouping.

It is the frame structure of the MAC header of present embodiment MD-A-MPDU shown in Fig. 7.Compared to the MD-A- of explicit grouping MPDU MAC headers design, with the domains STA Number instead of the domains Group ID in the case of implicit packet, and with AID List（It closes Join identification list）Domain is instead of the domains Index Bitmap.Wherein：

STA Number：Indicate STA number N of target of MD-A-MPDU（That is, it needs to receive of the STA of downlink data Number）.

AID List：The AID lists of multiple target STA, AID are the association identifications that AP distributes to STA；In AID List Multiple AID can be indicated using a variety of methods, such as：

In first way, each AID can use 2 byte representations, then the length of AID List is 2 × N number of byte；

In the second way, since the value range of AID in current WiFi is 1-2007,11bits is actually only needed Indicate AID, therefore the length of AID List isA byte.Indicate the smallest positive integral not less than x；

In the third mode, the STA of AP actual associations may only have tens of up to a hundred, therefore can use the AID Length of 4bit Indicate the occupancy length of each AID, bitwise.Assuming that AID Length=y, then the length of AID List isA byte, as shown in Figure 8 a；

In 4th kind of mode, if the AID of multiple target STA is comparatively continuous, Bitmap may be used to carry target The AID of STA.In this case, the opposite offset of these AID should also be carried（Offset）Value, as shown in Figure 8 b.Assuming that AID Offset values are z, then the practical AID of the STA of position u is z+u in Bitmap.In this representation, STA Number are not necessarily to, Therefore the corresponding domains STA Number can be used as reserved field.

Above-mentioned second to the 4th kind of mode is suitable for different situations, can be used simultaneously, and uses control bit（AID control）Indicate that AID List have used any mode, as shown in Figure 8 c.For example, before the domains STA Number can be taken Two indicate that the second way, 01- indicate the third mode as control bit, with 00, and 10 indicate the 4th kind of mode, etc..

More than, implicit packet management is illustrated.Compared with the frame structure of MD-A-MPDU in explicit grouping management, It differs only in：With the domains STA Number instead of the domains Group ID, and with the domains AID List instead of the domains Index Bitmap； Other frame structure designs are identical as explicit grouping management, and details are not described herein again.

It, can root when STA, which receives one, includes the MD-A-MPDU of the downlink data of oneself in some embodiments of the invention It is described in detail below using different confirmation response methods according to the difference of system access strategy：

In a kind of embodiment, if it is to obtain media access authority by competition that system, which is currently accessed strategy, when STA is logical It crosses to send to AP first when competition obtains channel and confirms response, then retransmit other data；

In another embodiment, if it is central dispatching that system, which is currently accessed strategy, i.e., the transmission of STA is uniformly arranged by AP Resource, STA can then be sent to AP first in AP next times is the transfer resources of oneself distribution confirms response, then retransmits other Data.In a kind of concrete implementation method, the last one subframe may include Resource Allocation Frame in MD-A-MPDU, the resource allocation Frame is used to indicate that each STA to send the specific running time-frequency resource for confirming response；Meanwhile the Resource Allocation Frame is broadcast or multicast subframe, So that all target STA can receive.For example, the destination address field of Resource Allocation Frame is set as 0（That is AID=0）To indicate to broadcast AID。

In above two embodiment, it is difficult that SIFS is spaced after MD-A-MPDU is sent out to confirm response all（Short Interframe Space, minimum interframe space）It completes, therefore the confirmation strategy of the MPDU in MD-A-MPDU in each subframe（Ack Policy）Generally cannot be immediate（Immediately）ACK（Confirm response）Or immediate BlockAck（Block confirmation is answered It answers）, and should be delay（Delay）ACK or delay BlockAck.Wherein each STA sends the delay time for confirming response It is specified in Resource Allocation Frame.

Can include multiple MAC Service Data Units in some embodiments of the invention, in the MPDU of the parts MD-A-MPDU （MAC Service Data Unit, MSDU）, i.e. A-MSDU.At this point, the frame in MPDU shown in fig. 6（Frame Body） Part, including multiple A-MSDU subframes, for this multiple A-MSDU subframe for the same STA, structure is for example as shown in Figure 9. In a MD-A-MPDU, the MPDU in different MD-A-MPDU subframes can be different type（Such as control frame or data frame Or management frame）, but all A-MSDU subframes in same MPDU must be same type（Typically data frame）.

It is appreciated that said program of the embodiment of the present invention for example can be in access point（AP）Equipment such as wireless routing utensil Body is implemented.

Therefore the invention discloses a kind of multiple target convergence transmission method, this method is used the downlink of multiple STA Data aggregate is the technical solution that a multiple target aggregate data frame carries out downlink transfer, achieves following technique effect：For Multiple STA in same grouping, can be used identical emission parameter, without frequently adjustment emission parameter；By by same grouping The downlink data of multiple STA be polymerized to a multiple target aggregate data frame, it is possible to reduce header overhead is eated dishes without rice or wine out to save Pin improves efficiency of transmission.

It should be noted that in actual standard, preamble and PLCP distributions and not always general rule as shown in Figure 4 It is whole.Two kinds of PPDU formats in 802.11n as shown in figure 14, L（Legacy, it is old）-STF（Short Training Field, Short Training domain）、L-LTF（Long Training Field, long training domain）、HT（High Throughput, high-throughput）- STF, HT-LTF belong to preamble, and L-SIG, HT-SIG then belong to PLCP heads, but are staggered between them.Again The PPDU formats of 802.11ac as shown in figure 15, wherein L-STF, L-LTF, VHT（Very High Throughput, it is high or Very high-throughput）- STF, VHT-LTF belong to preamble, and L-SIG（Signal, signal domain）、VHT-SIG-A、VHT- SIG-B then belongs to PLCP heads, is also staggered between them.

Referring to FIG. 10, another multiple target convergence transmission method of the embodiment of the present invention, for including an access point The system of AP and at least two site STAs；Method may include：

210, the first STA receives the multiple target aggregate data frame that the AP is sent, and the multiple target aggregate data frame includes The downlink data of multiple STA at least two STA, the first STA are any of described at least two STA；

220, the first STA detects one's own downlink data from the multiple target aggregate data frame.

In some embodiments of the invention, it may also include before 210：First STA receives the group mark that the AP is sent Notification frame carries the group mark of the first grouping belonging to the first STA and the first STA in described group of identification notification frame Serial number.

In some embodiments of the invention, the multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header Portion and subframe part；Wherein, the heads PLCP include indicating bit；The MAC header includes：Transmitting terminal address, group mark, The serial number position table of the multiple STA, the remaining time of present frame interaction sequence and cyclic redundancy check code CRC；The subframe Part includes multiple subframes corresponding to the multiple STA, and the subframe includes the downlink data of corresponding STA.

Correspondingly, step 220 may include：First STA is according to the PLCP in the multiple target aggregate data frame received Indicating bit in head, the data frame acknowledged receipt of are multiple target aggregate data frames, and confirm that therein group of mark is described After the group mark of one grouping, according to the serial number position table of the multiple STA judge in the multiple target aggregate data frame whether include Corresponding to the subframe of the first STA, if including, the subframe corresponding to the first STA is detected from the subframe part, And the downlink data of the first STA is detected from the subframe corresponding to the first STA.

In some embodiments of the invention, the multiple target aggregate data frame may include：Targeting sequencing, the heads PLCP, MAC header Portion and subframe part；Wherein, the heads PLCP include indicating bit, and the MAC header includes：Transmitting terminal address, it is described more The number of a STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence, and cycle are superfluous Remaining check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes corresponding The downlink data of STA；

Correspondingly, step 220 may include：First STA is according to the PLCP in the multiple target aggregate data frame received Indicating bit in head, the data frame acknowledged receipt of are multiple target aggregate data frames, and according to the AID lists of the multiple STA Judge in the multiple target aggregate data frame whether to include the subframe for corresponding to the first STA, if including, from the subframe Detection corresponds to the subframe of the first STA in part, and detects described first from the subframe corresponding to the first STA The downlink data of STA.

In some embodiments of the invention, the subframe may include：MPDU delimiters, MPDU and filler PAD；It is described MPDU does not include the domains address1 for indicating receiving terminal address and the domains address2 for indicating transmitting terminal address, but includes corresponding to The domains AID of the AID of STA.

In some embodiments of the invention, the last one subframe in the multiple target aggregate data frame includes resource allocation Frame, the Resource Allocation Frame can be broadcast or multicast subframe, confirm that the specific time-frequency of response provides for indicating that each STA is sent Source.

More than, using STA as executive agent, the multiple target convergence transmission method of the embodiment of the present invention has been carried out briefly It is bright, it is more detailed to introduce, please refer to Fig.2 shown in, using AP as in the multiple target convergence transmission method embodiment of executive agent Description.

It is appreciated that said program of the embodiment of the present invention for example can be in website（STA）The movement such as equipment, such as mobile phone is set The wireless devices such as standby or laptop, specific implementation.

Therefore the invention discloses a kind of multiple target convergence transmission method, this method is used and is grouped to STA, The downlink data of multiple STA in same grouping is polymerized to the technical side that a multiple target aggregate data frame carries out downlink transfer Case achieves following technique effect：By being grouped to STA so that, for multiple STA in same grouping, phase can be used Same emission parameter, without frequently adjustment emission parameter；By the way that the downlink data of multiple STA of same grouping is polymerized to one Multiple target aggregate data frame, it is possible to reduce header overhead improves efficiency of transmission to save empty overhead.

In order to preferably implement the said program of the embodiment of the present invention, it is also provided below and implements said program for coordinating Relevant apparatus.

1 is please referred to Fig.1, the embodiment of the present invention provides a kind of access point（AP）, for it is a kind of include described access point AP and The system of at least two site STAs；The AP may include：

Aggregation module 320, for the downlink data of multiple STA at least two STA to be polymerized to mesh more than one Mark aggregate data frame；

Sending module 330, for the multiple target aggregate data frame to be sent to the multiple STA, so as to the multiple Each STA in STA detects one's own downlink data from the multiple target aggregate data frame.

Please refer to Fig.1 1, in some embodiments of the invention, the AP may also include：

Grouping module 310, for according at least one in Modulation and Coding Scheme MCS, reception antenna number and physical location At least two STA is divided into N number of grouping by kind factor, and N is the positive integer more than or equal to 1, wherein each grouping includes At least two STA；Correspondingly, the sending module 330, specifically for the downlink data of multiple STA in same grouping is gathered It is combined into a multiple target aggregate data frame.

Wherein, the grouping module 310 is particularly used in Modulation and Coding Scheme（MCS）It is identical, and/or, reception antenna Number is identical, and/or, at least two STA that physical location closes on points are one group.

In some embodiments of the invention, the grouping module 310 is additionally operable to as wherein each grouping distribution group identifies, and For each STA Allotment Serial Numbers in each grouping；The sending module 330 is additionally operable to the group mark of the first grouping and institute The serial number of each STA in the first grouping is stated, is carried in group identification notification frame, each STA being sent in first grouping； First grouping is any grouping in N number of grouping.

In some embodiments of the invention, the aggregation module 320 is particularly used in multiple in first grouping When STA carries out downlink transfer, the downlink data of multiple STA in first grouping is polymerized to a multiple target aggregated data Frame, the multiple target aggregate data frame include：Targeting sequencing, the heads physical layer convergence procedure PLCP, media access control MAC head Portion and subframe part；Wherein, the heads PLCP include being used to indicate the finger that affiliated data frame is multiple target aggregate data frame Show position；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, present frame interaction sequence Remaining time and cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, institute State the downlink data that subframe includes corresponding STA.

In some embodiments of the invention, the aggregation module 320, be particularly used in multiple STA in second packet into When row downlink transfer, the downlink data of multiple STA in the second packet is polymerized to a multiple target aggregate data frame, institute Stating multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP Include being used to indicate the indicating bit that affiliated data frame is multiple target aggregate data frame, the MAC header includes：Transmitting terminal Location, the number of the multiple STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence, with And cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, is wrapped in the subframe Include the downlink data of corresponding STA；The second packet is any grouping in N number of grouping.

The access point of the embodiment of the present invention for example can be wireless router device.

It is appreciated that the function of each function module of the access point apparatus of the embodiment of the present invention can be according to above method reality The method specific implementation in example is applied, specific implementation process can refer to the associated description in above method embodiment, herein no longer It repeats.

Therefore the access point apparatus of the embodiment of the present invention can be grouped STA, it will be multiple in same grouping The downlink data of STA is polymerized to a multiple target aggregate data frame and carries out downlink transfer, to achieve following technique effect： By being grouped to STA so that, for multiple STA in same grouping, identical emission parameter can be used, without frequent Adjust emission parameter；It, can be with by the way that the downlink data of multiple STA of same grouping is polymerized to a multiple target aggregate data frame Header overhead is reduced, to save empty overhead, improves efficiency of transmission.

2 are please referred to Fig.1, the embodiment of the present invention provides a kind of website（STA）, for one kind including an access point AP and extremely The system of few two site STAs；The STA may include：

Receiving module 410, the multiple target aggregate data frame sent for receiving the AP, the multiple target aggregate data frame Include the downlink data of multiple STA at least two STA, the first STA is any at least two STA It is a；

Detection module 420 detects one's own downlink for the first STA from the multiple target aggregate data frame Data.

In some embodiments of the invention, the receiving module 410 is additionally operable to receive the group identification notification that the AP is sent Frame carries the sequence of the group mark and the first STA of the first grouping belonging to the first STA in described group of identification notification frame Number.

In some embodiments of the invention, the multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header Portion and subframe part；Wherein, the heads PLCP include indicating bit；The MAC header includes：Transmitting terminal address, group mark, The serial number position table of the multiple STA, the remaining time of present frame interaction sequence and cyclic redundancy check code CRC；The subframe Part includes multiple subframes corresponding to the multiple STA, and the subframe includes the downlink data of corresponding STA；The inspection Module 420 is surveyed, is particularly used according to the indicating bit in the heads PLCP in the multiple target aggregate data frame received, acknowledges receipt of Data frame be multiple target aggregate data frame, and confirm therein group of mark be it is described first grouping group mark after, according to institute The serial number position table for stating multiple STA judges in the multiple target aggregate data frame whether to include subframe corresponding to the first STA, If including detecting the subframe corresponding to the first STA from the subframe part, and from corresponding to the first STA's The downlink data of the first STA is detected in subframe.

In some embodiments of the invention, the multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header Portion and subframe part；Wherein, the heads PLCP include indicating bit, and the MAC header includes：Transmitting terminal address, it is described more The number of a STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence, and cycle are superfluous Remaining check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes corresponding The downlink data of STA；The detection module 420 is particularly used according to the PLCP heads in the multiple target aggregate data frame received Indicating bit in portion, the data frame acknowledged receipt of are multiple target aggregate data frames, and are sentenced according to the AID lists of the multiple STA Whether include the subframe for corresponding to the first STA in the disconnected multiple target aggregate data frame, if including, from the subframe portion Detection corresponds to the subframe of the first STA in point, and detects the first STA from the subframe corresponding to the first STA Downlink data.

The site apparatus of embodiment of the present invention wireless devices such as mobile device or laptop such as can be mobile phone.

It is appreciated that the function of each function module of the site apparatus of the embodiment of the present invention can be implemented according to the above method Method specific implementation in example, specific implementation process can refer to the associated description in above method embodiment, no longer superfluous herein It states.

Therefore the site apparatus of the embodiment of the present invention can receive access point apparatus transmission including multiple STA The multiple target aggregate data frame of downlink data, and therefrom check one's own downlink data, to achieve following technology effect Fruit：Access point one end can be grouped STA so that, for multiple STA in same grouping, identical transmitting ginseng can be used Number, without frequently adjustment emission parameter；Support multiple target aggregate data frame, it is possible to reduce header overhead, to save empty overhead, Improve efficiency of transmission.

3 are please referred to Fig.1, the embodiment of the present invention provides a kind of multiple target aggregation transfer system, it may include：

One access point as described in Figure 11 embodiments（AP）300, and, at least two stations as described in Figure 12 embodiments Point（STA）400.

The multiple target aggregation transfer system of the embodiment of the present invention for example can be with WIFI network system.

It is appreciated that the function of each function module of the multiple target aggregation transfer system of the embodiment of the present invention can be according to upper The method specific implementation in embodiment of the method is stated, specific implementation process can refer to the associated description in above method embodiment, Details are not described herein again.

Therefore the multiple target aggregation transfer system of the embodiment of the present invention, it is grouped using to STA, by same point The downlink data of multiple STA in group is polymerized to the technical solution that a multiple target aggregate data frame carries out downlink transfer, obtains Following technique effect：By being grouped to STA so that, for multiple STA in same grouping, identical hair can be used Parameter is penetrated, without frequently adjustment emission parameter；By the way that the downlink data of multiple STA of same grouping is polymerized to a multiple target Aggregate data frame, it is possible to reduce header overhead improves efficiency of transmission to save empty overhead.

In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment Part, may refer to the associated description of other embodiments.

It should be noted that for each method embodiment above-mentioned, for simple description, therefore it is all expressed as a series of Combination of actions, but those skilled in the art should understand that, the present invention is not limited by described sequence of movement because according to According to the present invention, certain steps may be used other sequences or be carried out at the same time.Next, those skilled in the art should also know that, Embodiment described in this description belongs to preferred embodiment, and not necessarily the present invention must for involved action and module Must.

One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage Medium may include：ROM, RAM, disk or CD etc..

It is provided for the embodiments of the invention a kind of multiple target convergence transmission method and relevant device above and system carries out It is discussed in detail, principle and implementation of the present invention are described for specific case used herein, above example Explanation be merely used to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art, According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification Appearance should not be construed as limiting the invention.

Claims

1. a kind of multiple target convergence transmission method, which is characterized in that for including an access point AP and at least two site STAs System；The method includes：

According at least one of Modulation and Coding Scheme MCS, reception antenna number and physical location factor, by described at least two STA is divided into N number of grouping, and N is the positive integer more than or equal to 1, wherein each grouping includes at least two STA；

The downlink data of multiple STA in same grouping is polymerized to a multiple target aggregate data frame；

The multiple target aggregate data frame is sent to the multiple STA, so that each STA in the multiple STA is from described One's own downlink data is detected in multiple target aggregate data frame；

The downlink data by multiple STA in same grouping is polymerized to a multiple target aggregate data frame：

When carrying out downlink transfer to multiple STA in second packet, the downlink data of multiple STA in the second packet is gathered It is combined into a multiple target aggregate data frame, the multiple target aggregate data frame includes：Targeting sequencing, physical layer convergence procedure PLCP Head, media access control MAC head and subframe part；Wherein, the heads PLCP include being used to indicate affiliated data Frame is the indicating bit of multiple target aggregate data frame, and the MAC header includes：Transmitting terminal address, the number of the multiple STA, institute State the association identification AID lists of multiple STA, the remaining time of present frame interaction sequence and cyclic redundancy check code CRC；Institute It includes multiple subframes corresponding to the multiple STA to state subframe part, and the subframe includes the downlink data of corresponding STA； The second packet is any grouping in N number of grouping；

Or, the downlink data by multiple STA in same grouping is polymerized to also wrap before a multiple target aggregate data frame It includes：

It is identified for each grouping distribution group, and is each STA Allotment Serial Numbers in each grouping；

By the serial number of each STA in the group mark of the first grouping and first grouping, carry in group identification notification frame, hair Each STA in first grouping is given, first grouping is any grouping in N number of grouping；

When carrying out downlink transfer to multiple STA in first grouping, by the lower line number of multiple STA in first grouping According to being polymerized to a multiple target aggregate data frame, the multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header Portion and subframe part；Wherein, the heads PLCP include being used to indicate the finger that affiliated data frame is multiple target aggregate data frame Show position；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, present frame interaction sequence Remaining time and CRC；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes pair The downlink data of the STA answered.

2. according to the method described in claim 1, it is characterized in that：

The subframe includes：Media access control protocol data unit MPDU delimiters, MPDU and filler PAD；It is described MPDU does not include the domains address1 for indicating receiving terminal address and the domains address2 for indicating transmitting terminal address, but includes corresponding to The domains AID of the AID of STA.

3. according to the method described in claim 2, it is characterized in that,

The last one subframe in the multiple target aggregate data frame includes Resource Allocation Frame, for indicating that it is true that each STA is sent Recognize the specific running time-frequency resource of response.

4. a kind of multiple target convergence transmission method, which is characterized in that for including an access point AP and at least two site STAs System；The method includes：

First STA receives the multiple target aggregate data frame that the AP is sent, the multiple target aggregate data frame include it is described at least The downlink data of multiple STA in two STA, the first STA are any of described at least two STA；

First STA detects one's own downlink data from the multiple target aggregate data frame；

The multiple target aggregate data frame includes：Targeting sequencing, the heads physical layer convergence procedure PLCP, media access control MAC Head and subframe part；Wherein, the heads PLCP include indicating bit, and the MAC header includes：Transmitting terminal address, it is described The number of multiple STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence, and cycle Redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, and the subframe includes corresponding to STA downlink data；

First STA detects one's own downlink data from the multiple target aggregate data frame and includes：

First STA is according to the indicating bit in the heads PLCP in the multiple target aggregate data frame received, the number that acknowledges receipt of Multiple target aggregate data frame according to frame, and judged according to the AID lists of the multiple STA be in the multiple target aggregate data frame No includes the subframe corresponding to the first STA, if including, detection is corresponding to the first STA from the subframe part Subframe, and detect from the subframe corresponding to the first STA downlink data of the first STA；

Or, the multiple target aggregate data frame that the first STA receives the AP transmissions further includes before：

First STA receives the group identification notification frame that the AP is sent, and the first STA is carried in described group of identification notification frame The serial number of the group mark and the first STA of the first affiliated grouping；

The multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, described The heads PLCP include indicating bit；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, when The remaining time of previous frame interaction sequence and CRC；The subframe part includes multiple subframes corresponding to the multiple STA, institute State the downlink data that subframe includes corresponding STA；

First STA is according to the indicating bit in the heads PLCP in the multiple target aggregate data frame received, the number that acknowledges receipt of It is multiple target aggregate data frame according to frame, and confirms that therein group of mark is after the group of first grouping identifies, according to described more Whether the serial number position table of a STA judges in the multiple target aggregate data frame to include the subframe for corresponding to the first STA, if packet Include, then from the subframe part detection corresponding to the first STA subframe, and from the subframe corresponding to the first STA The downlink data of middle detection the first STA.

5. according to the method described in claim 4, it is characterized in that：

The subframe includes：MPDU delimiters, MPDU and filler PAD；The MPDU does not include indicating receiving terminal address The domains address1 and the domains address2 for indicating transmitting terminal address, but include the domains AID of the AID of corresponding STA.

6. according to the method described in claim 5, it is characterized in that,

7. a kind of access point AP, which is characterized in that be including described access point AP and at least two site STAs for a kind of System；Described access point AP includes：

Grouping module is used for according at least one of Modulation and Coding Scheme MCS, reception antenna number and physical location factor, At least two STA is divided into N number of grouping, N is the positive integer more than or equal to 1, wherein each grouping includes at least two A STA；

Aggregation module, for the downlink data of multiple STA in same grouping to be polymerized to a multiple target aggregate data frame；

Sending module, for the multiple target aggregate data frame to be sent to the multiple STA, so as in the multiple STA Each STA detects one's own downlink data from the multiple target aggregate data frame；

The aggregation module will be in the second packet when being specifically used for carrying out downlink transfer to multiple STA in second packet The downlink data of multiple STA be polymerized to a multiple target aggregate data frame, the multiple target aggregate data frame includes：Leading sequence Row, the heads physical layer convergence procedure PLCP, media access control MAC head and subframe part；Wherein, in the heads PLCP Including being used to indicate the indicating bit that affiliated data frame is multiple target aggregate data frame, the MAC header includes：Transmitting terminal Location, the number of the multiple STA, the association identification AID lists of the multiple STA, the remaining time of present frame interaction sequence, with And cyclic redundancy check code CRC；The subframe part includes multiple subframes corresponding to the multiple STA, is wrapped in the subframe The downlink data of corresponding STA is included, the second packet is any grouping in N number of grouping；

Or, the grouping module, is additionally operable to identify for each grouping distribution group, and sequence is distributed for each STA in each grouping Number；

The sending module is additionally operable to, by the serial number of each STA in the group mark of the first grouping and first grouping, carry In group identification notification frame, each STA being sent in first grouping, first grouping is in N number of grouping Any grouping；

The aggregation module, when being specifically used for carrying out downlink transfer to multiple STA in first grouping, by described first point The downlink data of multiple STA in group is polymerized to a multiple target aggregate data frame, and the multiple target aggregate data frame includes：Before Lead sequence, the heads PLCP, MAC header and subframe part；Wherein, the heads PLCP include being used to indicate affiliated data frame For the indicating bit of multiple target aggregate data frame；The MAC header includes：Transmitting terminal address, group mark, the sequence of the multiple STA Number position table, the remaining time of present frame interaction sequence and CRC；The subframe part includes corresponding to the more of the multiple STA A subframe, the subframe include the downlink data of corresponding STA.

8. a kind of site STA, which is characterized in that for it is a kind of include an access point AP and at least two site STAs System；The STA includes：

Receiving module, the multiple target aggregate data frame sent for receiving the AP, the multiple target aggregate data frame includes institute The downlink data of multiple STA at least two STA is stated, the first STA is any of described at least two STA；

Detection module detects one's own downlink data for the first STA from the multiple target aggregate data frame；

The detection module, specifically for according to the indicating bit in the heads PLCP in the multiple target aggregate data frame that receives, really The data frame acknowledged receipt of is multiple target aggregate data frame, and judges that the multiple target polymerize according to the AID lists of the multiple STA Whether include the subframe for corresponding to the first STA in data frame, if including, detection is corresponding to institute from the subframe part The subframe of the first STA is stated, and detects the downlink data of the first STA from the subframe corresponding to the first STA；

Or, the multiple target aggregate data frame includes：Targeting sequencing, the heads PLCP, MAC header and subframe part；Wherein, institute It includes indicating bit to state the heads PLCP；The MAC header includes：Transmitting terminal address, group mark, the serial number position table of the multiple STA, The remaining time of present frame interaction sequence and CRC；The subframe part includes multiple subframes corresponding to the multiple STA, The subframe includes the downlink data of corresponding STA；

The receiving module is additionally operable to receive the group identification notification frame that the AP is sent, institute is carried in described group of identification notification frame State the serial number of the group mark and the first STA of the first grouping belonging to the first STA；

The detection module, specifically for according to the indicating bit in the heads PLCP in the multiple target aggregate data frame that receives, really The data frame acknowledged receipt of is multiple target aggregate data frame, and confirm therein group of mark be it is described first grouping group mark after, Judge in the multiple target aggregate data frame whether to include corresponding to the first STA according to the serial number position table of the multiple STA Subframe, if including, from the subframe part detection corresponding to the first STA subframe, and from corresponding to described the The downlink data of the first STA is detected in the subframe of one STA.

9. a kind of multiple target aggregation transfer system, which is characterized in that including：

One access point AP as claimed in claim 7, and, at least two such as site STAs according to any one of claims 8.