CN104852777A

CN104852777A - Multi-target aggregation transmission method, related equipment, and system

Info

Publication number: CN104852777A
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: 2015-08-19
Anticipated expiration: 2034-02-14
Also published as: CN104852777B

Abstract

The invention discloses a multi-target aggregation transmission method, related equipment, and a system, so as to solve a technical problem that the conventional technology of aggregation transmission is just suitable for one receiving terminal. In some feasible embodiments of the invention, the method is used for the system which comprises one AP (access point) and at least two STAs (station points). The method comprises the steps: enabling the downlink data of a plurality of STAs to be aggregated into one multi-target aggregation data frame; and enabling the multi-target aggregation data frame to be transmitted to the plurality of STAs, so that each STA detects its downlink data from the multi-target aggregation data frame.

Description

Multiple target convergence transmission method and relevant device and system

Technical field

The present invention relates to communication technical field, be specifically related to a kind of multiple target convergence transmission method and relevant device and system.

Background technology

802.11n, as a kind of wireless transmission standards agreement, proposes a kind of aggregation transfer technology, namely, A(Aggregate, polymerization)-MPDU(MAC(Medium Access Control, medium education) Protocol Data Unit, Medium Access Control (MAC) Protocol Data Unit) mechanism.

The PPDU(PLCP(physical layer convergence procedure of A-MPDU, physical layer convergence process) protocol data unit, PLCP protocol Data Unit) structure is as shown in Figure 1, its physics head part comprises targeting sequencing (Preamble) and PLCP head (header), and a position wherein in PLCP header indicates this PPDU to be A-MPDU; Its MAC part can comprise multiple subframe, and each subframe comprises MPDU delimiter, MPDU and Pad(filler); MPDU delimiter comprises: 1) MPDU Length: the length of MPDU in present sub-frame; 2) CRC(cyclic redundancy code, cyclic redundancy check (CRC)): CRC check is carried out to MPDU Length and Reserved field; 3) Delimiter Signature(delimiter label): perseverance is 0X4.When certain sub-frame transmission mistake, by detecting this delimiter to determine the starting position of next subframe, be unlikely to cause other subframe all can not correctly receive because of a subframe error of transmission.

Wherein, the MPDU comprised in all subframes in an A-MPDU has identical RA(Receiver Address, receiving terminal address) territory and TA(Transmitter Address, transmitting terminal address) territory, namely, all MPDU in same A-MPDU have identical reception MAC Address and send MAC Address, and therefore, an A-MPDU is only applicable to a receiving terminal.

In addition, 802.11ad also proposed a kind of A-PPDU mechanism, transmits continuously, can save the targeting sequencing of interFrameGap and a rear PPDU between adjacent two PPDU for multiple PPDU with identical RA and TA, thus reaches the object of saving transport overhead.But an A-PPDU is also only applicable to a receiving terminal.

Summary of the invention

The embodiment of the present invention provides a kind of multiple target convergence transmission method and relevant device and system, to solve the technical problem that existing aggregation transfer technology is only applicable to a receiving terminal.

First aspect present invention provides a kind of multiple target convergence transmission method, for comprising the system of access point AP and at least two site STA; Described method comprises: the downlink data of the multiple STA in described at least two STA is polymerized to a multiple target aggregate data frame; Described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

In the implementation that the first is possible, the described downlink data by multiple STA also comprises before being polymerized to a multiple target aggregate data frame: according at least one factor in Modulation and Coding Scheme MCS, reception antenna number and physical location, described at least two STA are divided into N number of grouping, N be more than or equal to 1 positive integer, wherein each grouping comprises at least two STA; Accordingly, the described downlink data by multiple STA is polymerized to a multiple target aggregate data frame and comprises: the downlink data of the multiple STA in same grouping is polymerized to a multiple target aggregate data frame.

In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, the described downlink data by the multiple STA in same grouping also comprises before being polymerized to a multiple target aggregate data frame: be each grouping point combo mark, and be each STA Allotment Serial Number in each grouping; By the sequence number of each STA in the group mark of the first grouping and described first grouping, be carried in group identification notification frame, send to each STA in described first grouping; Described first grouping is the arbitrary grouping in described N number of grouping.

In conjunction with the implementation that the second of first aspect is possible, in the implementation that the third is possible, the described downlink data by the multiple STA in same grouping is polymerized to a multiple target aggregate data frame and comprises: when carrying out downlink transfer to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure PLCP head, media access control MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.

In conjunction with the first possible implementation of first aspect, in the 4th kind of possible implementation, the described downlink data by the multiple STA in same grouping is polymerized to a multiple target aggregate data frame and comprises: when carrying out downlink transfer to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame, described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described second grouping is the arbitrary grouping in described N number of grouping.

In conjunction with the third or the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, described subframe comprises: media access control protocol data unit MPDU delimiter, MPDU, and filler PAD; Described MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.

In conjunction with the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, last subframe in described multiple target aggregate data frame comprises Resource Allocation Frame, sends the concrete running time-frequency resource of confirmation response for indicating each STA.

Second aspect present invention provides a kind of multiple target convergence transmission method, for comprising the system of access point AP and at least two site STA; Described method comprises: a STA receives the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, and a described STA is any one in described at least two STA; A described STA detects one's own downlink data from described multiple target aggregate data frame.

In the implementation that the first is possible, a described STA also comprises before receiving the multiple target aggregate data frame of described AP transmission: a described STA receives the group identification notification frame that described AP sends, and carries the group mark of the first grouping belonging to a described STA and the sequence number of a described STA in described group of identification notification frame.

In conjunction with the first possible implementation of second aspect, in the implementation that the second is possible, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part, wherein, described PLCP head comprises indicating bit, described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC, described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA, a described STA detects one's own downlink data and comprises from described multiple target aggregate data frame: a described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and from the subframe corresponding to a described STA, detect the downlink data of a described STA.

In conjunction with second aspect, in the implementation that the third is possible, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part, wherein, described PLCP head comprises indicating bit, and described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC, described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA, a described STA detects one's own downlink data and comprises from described multiple target aggregate data frame: a described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and from the subframe corresponding to a described STA, detect the downlink data of a described STA.

In conjunction with the second or the third possible implementation of second aspect, in the 4th kind of possible implementation, described subframe comprises: MPDU delimiter, MPDU, and filler PAD; Described MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, last subframe in described multiple target aggregate data frame comprises Resource Allocation Frame, sends the concrete running time-frequency resource of confirmation response for indicating each STA.

Third aspect present invention provides a kind of access point AP, for a kind of system comprising described access point AP and at least two site STA; Described access point AP comprises: aggregation module, for the downlink data of the multiple STA in described at least two STA is polymerized to a multiple target aggregate data frame; Sending module, for described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

In the implementation that the first is possible, described access point AP also comprises: grouping module, for according at least one factor in Modulation and Coding Scheme MCS, reception antenna number and physical location, described at least two STA are divided into N number of grouping, N be more than or equal to 1 positive integer, wherein each grouping comprises at least two STA; Accordingly, described sending module, specifically for being polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA in same grouping.

In conjunction with the first possible implementation of the third aspect, in the implementation that the second is possible, described grouping module also for dividing combo to identify for each grouping, and is each STA Allotment Serial Number in each grouping; Described sending module, also for the sequence number by each STA in the group mark of the first grouping and described first grouping, is carried in group identification notification frame, sends to each STA in described first grouping; Described first grouping is the arbitrary grouping in described N number of grouping.

In conjunction with the implementation that the second of the third aspect is possible, in the implementation that the third is possible, described aggregation module, during specifically for carrying out downlink transfer to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, and described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure PLCP head, media access control MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.

In conjunction with the first possible implementation of the third aspect, in the 4th kind of possible implementation, described aggregation module, during specifically for carrying out downlink transfer to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, and described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame, described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described second grouping is the arbitrary grouping in described N number of grouping.

Fourth aspect present invention provides a kind of site STA, for a kind of system comprising an an access point AP and at least two described site STA; Described STA comprises: receiver module, for receiving the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, a described STA is any one in described at least two STA; Detection module, detects one's own downlink data for a described STA from described multiple target aggregate data frame.

In the implementation that the first is possible, described receiver module, also for receiving the group identification notification frame that described AP sends, carries the group mark of the first grouping belonging to a described STA and the sequence number of a described STA in described group of identification notification frame.

In conjunction with the first possible implementation of fourth aspect, in the implementation that the second is possible, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described detection module, specifically for the indicating bit in the PLCP head in the multiple target aggregate data frame that basis receives, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

In conjunction with fourth aspect, in the implementation that the third is possible, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit, and described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described detection module, specifically for the indicating bit in the PLCP head in the multiple target aggregate data frame that basis receives, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

Fifth aspect present invention provides a kind of multiple target aggregation transfer system, comprising: an access point AP as described in third aspect present invention, and, at least two site STA as described in fourth aspect present invention.

Therefore, the embodiment of the present invention adopts and the downlink data of multiple STA is polymerized to the technical scheme that a multiple target aggregate data frame carries out downlink transfer, achieve following technique effect: for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Be polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA by same grouping, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

Accompanying drawing explanation

In order to be illustrated more clearly in embodiment of the present invention technical scheme, be briefly described to the accompanying drawing used required in embodiment and description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

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

Fig. 2 is the schematic diagram of a kind of multiple target convergence transmission method that the embodiment of the present invention provides;

Fig. 3 is the schematic diagram of the WiFi network system be made up of an AP and multiple STA;

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

Fig. 8 a and 8b is the structural representation of two kinds of AID List respectively;

Fig. 8 c is the schematic diagram of the control bit of AID List;

Fig. 9 is the frame structure schematic diagram of the A-MSDU subframe that Frame Body part comprises;

Figure 10 is the schematic diagram of the another kind of multiple target convergence transmission method that the embodiment of the present invention provides;

Figure 11 is the schematic diagram of a kind of AP that the embodiment of the present invention provides;

Figure 12 is the schematic diagram of a kind of STA that the embodiment of the present invention provides;

Figure 13 is the schematic diagram of a kind of multiple target aggregation transfer system that the embodiment of the present invention provides;

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.

Embodiment

The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.

Below by specific embodiment, be described in detail respectively.

Please refer to Fig. 2, the embodiment of the present invention provides a kind of multiple target convergence transmission method, and the method is used for the system comprising an access point (Access Point, AP) and at least two websites (Station, STA), such as WiFi network system.Above-mentioned multiple target convergence transmission method can comprise:

In advance described at least two STA are divided into N number of grouping, N be more than or equal to 1 positive integer, wherein each grouping comprises at least two STA.

In WiFi of future generation, equipment dense distribution is an important scene.Suppose that AP establishes with a lot of STA to associate.When AP sends downlink data, if the selection of launching target is random selecting, then AP frequently need adjust emission parameter, as transmitting power, Modulation and Coding Scheme (Modulation and Coding Scheme, MCS), beam forming (Beamforming) parameter etc., because need different emission parameters for each STA.

In practical application scene, the distribution of user often and non-uniform Distribution, but presents certain focus aggregation properties.Like this, if geographical position is close, in the classification of equipment that receiving feature is close divides into groups to one, each downlink transfer of AP is carried out for the STA equipment of a grouping; Then, for the STA equipment in a grouping, AP uses identical emission parameter, and without the need to frequently adjusting emission parameter.

For this reason, the present invention proposes one and can be described as MD-A-MPDU(Multi-Destination A-MPDU, multiple target A-MPDU) technical scheme.The basic thought of technical solution of the present invention is: as shown in Figure 3, in the WiFi network system be made up of an AP and multiple STA, according to receiving feature and/or physical location, STA is divided into groups, multiple STA that wherein receiving feature is close or identical, physical location is close are divided into one group; When AP carries out downlink transfer, the downlink data of the multiple STA belonging to same grouping is aggregating and transmits, like this, AP can be avoided frequently to adjust emission parameter, and can header overhead be reduced due to aggregation transfer, thus can efficiency of transmission be improved.

Such as, do not consider multiple antennas, then MCS is STA primary recipient parameter, at least two identical for Modulation and Coding Scheme (MCS) STA can be divided into one group.Or, if consider Beamforming, also can be identical by MCS, and/or reception antenna number is identical, and/or at least two STA that physical location closes on are divided into one group; AP can go out descending guiding matrix (Steering Matrix) according to the channel matrix COMPREHENSIVE CALCULATING in group between each STA and AP, then uses this guiding matrix to carry out downlink transfer.In other execution mode, other packet mode can also be adopted.Preferably, according at least one factor in MCS, reception antenna number and physical location, described at least two STA can be divided into N number of grouping.

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

When AP carries out downlink transfer, the data aggregate of the multiple STA belonging to same grouping is got up to transmit, that is, adopt identical emission parameter for multiple STA of same group, like this, AP can be avoided frequently to adjust emission parameter; Further, because aggregation transfer can reduce header overhead, thus efficiency of transmission can be improved.Said multiple STA is at least two herein, can be the whole STA in a grouping, also can be the part STA in a grouping.

The multiple target aggregate data frame obtained after polymerization comprises multiple subframe, and wherein, each subframe corresponds to a STA; In same multiple target aggregate data frame, different subframe may correspond in different STA, also may correspond in identical STA, but, have at least two subframes to correspond respectively to different STA.In subframe corresponding to each STA, comprise the downlink data belonging to this STA.

120, described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

After STA receives multiple target aggregate data frame, if this multiple target aggregate data frame comprises the downlink data belonging to this STA, then this STA can from wherein extracting one's own downlink data; If do not comprise the downlink data belonging to this STA in this multiple target aggregate data frame, then this STA this multiple target aggregate data frame discardable.

In the embodiment of the present invention, the above-mentioned grouping carried out STA can comprise two kinds of packet modes, and one is explicit grouping, and another kind is implicit packet.For different packet modes, can be multiple target aggregate data frame and design different frame formats.Below, be described in detail respectively.

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

Explicit grouping manages, that is, equipment is clearly classified as a certain group, points out the mark of group belonging to equipment.The shortcoming of this grouping management mode need be safeguarded group by explicit message (as management frames), expends certain administration overhead.Such as, when the device is moved, its receiving feature (as MCS) may change, therefore need revise the information such as the group mark of dividing into groups belonging to STA by signaling.But because WiFi is mainly used in low speed and static scene, this grouping change is general also infrequently, is therefore acceptable.The advantage of this explicit grouping way to manage is, group mark can be used to represent one group of equipment, and when historical facts or anecdotes border uses, the receiving target equipment of MD-A-MPDU can represent by shorter field.

In present embodiment, also can comprise before above-mentioned steps 110: for wherein each grouping point combo identifies, and be each STA Allotment Serial Number in each grouping; By the sequence number of each STA in the group mark of the first grouping and described first grouping, be carried in group identification notification frame, send to each STA in described first grouping; Described first grouping is the arbitrary grouping in described N number of grouping.

Accordingly, step 110 specifically can comprise: when carrying out downlink transfer to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure (physical layer convergence procedure, PLCP) head, medium education (MAC) head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code (cyclic redundancy code, CRC); Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.The remaining time of described present frame interaction sequence, do not comprise the further part of present frame, but count from the present frame end of transmission, comprise subsequent transmission frame time, interFrameGap, response frame transmission time etc.

Below, the frame structure by reference to the accompanying drawings, illustrates further:

As shown in Figure 4, the PPDU of present embodiment MD-A-MPDU, the i.e. frame structure of aforesaid multiple target aggregate data frame, its physics head comprises: targeting sequencing (Preamble) and PLCP head (header), wherein PLCP header comprises an indicating bit, being used to indicate this PPDU is MD-A-MPDU, and this indicating bit is arranged in Signal territory or the SERVICE territory of PLCP header; Its MAC part comprises MAC head (that is, MD-A-MPDU header) and multiple subframe (that is, MD-A-MPDU subframe).

Compared with the PPDU of the A-MPDU shown in Fig. 1, a main distinction is the increase in MAC head.As shown in Figure 4, MAC head comprises following multiple territory:

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

Group ID(group identify): represent institute for grouping group identify.

Index Bitmap(sequence number bit table): the reception STA sequence number bit table in a packet representing this aggregation transfer, wherein, need position corresponding to the sequence number of the STA of downlink data receiving can represent with 1, do not need position corresponding to the sequence number of the STA of downlink data receiving can represent with 0.

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

CRC(cyclic redundancy code, cyclic redundancy check (CRC) code): for carrying out CRC check to MAC head.

Multiple STA can be comprised in a grouping, in MD-A-MPDU transmission, may for the whole STA in grouping, also may for the part STA in grouping.Therefore, distribute a sequence number (Index) can to each STA in group, each STA can carry out unique identification with (Group ID, Index).Once transmission institute for the sequence number of multiple STA equipment can Bitmap form represent, the corresponding Bit of sequence number is the data comprising this STA in 1 this MD-A-MPDU of expression, if 0 expression does not comprise the data of this STA.Such as, Bitmap is 10010, then represent this MD-A-MPDU comprise sequence number be 1 STA and sequence number be the downlink data of the STA of 5, meanwhile, subframe that numeric order represents that STA is corresponding also can be utilized in the position of subframe part, such as, Bitmap is 10010, and subframe part comprises two subframes, then, it is the STA of 1 that 1st subframe corresponds to sequence number, and it is the STA of 5 that the 2nd subframe corresponds to sequence number.

For explicit grouping management, AP need specify the group belonging to STA to identify (Group ID) and sequence number (Index) in advance, can design new information element Group element, as shown in Figure 5.It is multiple that the mutually mutual frame type of AP and STA comprises control frame, management frames and Frame.The information element Group element comprising group mark (Group ID) and sequence number (Index) etc. can be included in management frames as sent to STA in group identification notification frame, in embody rule, can be included in Association Response frame or Probe Response frame, also can carry by other management frames, as the Action management frames newly defined.

The MD-A-MPDU(received from its associated AP as STA is, described multiple target aggregate data frame) time, can check whether the Group ID in MAC head identifies identical with the group of dividing into groups belonging to oneself, if different, then abandon this frame, and dormancy in the time indicated by Length/Duration territory; If identical, then check in Index Bitmap territory, whether the corresponding position of the sequence number of oneself is 1; If not 1, then abandon this frame, and dormancy in the time indicated by Length/Duration territory; If 1, then receive this frame subsequent subframe part, and therefrom detect the subframe corresponding to this STA, thus obtain the MPDU of oneself.

As shown in Figure 6, be the frame structure schematic diagram of the subframe that in MD-A-MPDU, subframe part comprises.Described subframe comprises: media access control protocol data unit (MPDU) delimiter (MPDU Delimiter), MPDU, and filler (PAD) is for three parts; Wherein:

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

In MD-A-MPDU, in A-MPDU shown in MPDU and Fig. 1, the MPDU of PPDU compares as shown in Figure 6, and done some and simplified, its difference mainly comprises:

In technical solution of the present invention, MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.This is because: address2 domain representation transmitting terminal address (TA), comprises, therefore can remove in the TA territory of MAC head; Address1 domain representation receiving terminal address (RA), the i.e. MAC Address of target STA, in technical solution of the present invention, substitute with AID territory.AID domain representation target STA with the association identification of AP.And, in the MPDU of technical solution of the present invention, represent that the Duration/ID territory of present frame interaction sequence remaining time represents by the Length/Duration of MAC head is implicit, therefore, the Duration/ID territory in MPDU can be cancelled, and in the position in this Duration/ID territory and address1 territory, replace described AID territory.

It should be noted that, the MPDU frame type (such as Frame/control frame/management frames) that in same MD-A-MPDU, different subframe comprises can be different.Each MPDU is not except containing except Address1 territory and Address2 territory, and whether comprising other territory can be determined on a case-by-case basis.Such as, in management frames, can be free of Address4 territory, in the frame except+HTC frame, can be free of HT Control territory, in non-QoS frame, can be free of QoS Control territory, etc.

Above, explicit grouping management is illustrated.

In another embodiment of the present invention, the implicit packet management can carried out STA.

Implicit packet manages, that is, AP does not clearly divide into groups to association STA, but is directly carried in multiple target aggregate data frame by target STA identification list when sending MD-A-MPDU.In implicit packet situation, the PPDU format of MD-A-MPDU is identical with during explicit grouping substantially, but the particular content difference in MAC head.

In present embodiment, step 110 specifically can comprise: when carrying out downlink transfer to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame, described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described second grouping is the arbitrary grouping in described N number of grouping.

Shown in Fig. 7, it is the frame structure of the MAC head of present embodiment MD-A-MPDU.Compared to the MD-A-MPDU MAC head design of explicit grouping, in implicit packet situation, instead of Group ID territory with STA Number territory, and with the list of AID List(association identification) territory instead of Index Bitmap territory.Wherein:

STA Number: namely the target STA number N(representing MD-A-MPDU, needs the number of the STA of downlink data receiving).

The AID list of AID List: multiple target STA, AID is the association identification that AP distributes to STA; Multiple AID in AID List can use multiple method representation, such as:

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

In the second way, because in current WiFi, the span of AID is 1-2007, in fact only need 11bits to represent AID, therefore the length of AID List is individual byte. represent the smallest positive integral being not less than x;

In the third mode, the STA of AP actual association may only have tens of up to a hundred, therefore the AID Length of available 4bit represents that each AID's takies length, bitwise.Suppose AID Length=y, then the length of AID List is individual byte, as shown in Figure 8 a;

In 4th kind of mode, if the AID of multiple target STA is comparatively continuous, then Bitmap can be used to carry the AID of target STA.In this case, relativity shift (Offset) value of these AID should also be carried, as shown in Figure 8 b.Suppose that AID Offset value is for z, then in Bitmap, the actual AID of the STA of position u is z+u.In this representation, without the need to STA Number, therefore corresponding STA Number territory can be used as reserved field.

Above-mentioned second to the 4th kind of mode is applicable to different situations, can use simultaneously, and uses control bit (AID control) to represent that AID List employs any mode, as shown in Figure 8 c.Such as, the front two can getting STA Number territory, as control bit, represents the second way with 00, and 01-represents the third mode, and 10 represent the 4th kind of mode, etc.

Above, implicit packet management is illustrated.In managing with explicit grouping MD-A-MPDU frame structure compared with, difference be only: instead of Group ID territory with STA Number territory, and instead of Index Bitmap territory with AID List territory; Other frame structure design manages identical with explicit grouping, repeats no more herein.

In some embodiments of the invention, when STA receive one comprise the MD-A-MPDU of the downlink data of oneself time, according to the difference of system access strategy, different confirmation response methods can be adopted, is below described in detail:

In a kind of execution mode, if the current access strategy of system obtains media access authority by competition, then first send confirmation response to AP when STA obtains channel by competition, and then send other data;

In another kind of execution mode, if the current access strategy of system is central dispatching, namely by the unified transfer resource arranging STA of AP, first STA then can send confirmation response to AP in the next transfer resource for oneself distributing of AP, and then sends other data.In a kind of concrete implementation method, in MD-A-MPDU, last subframe can comprise Resource Allocation Frame, and this Resource Allocation Frame sends the concrete running time-frequency resource of confirmation response for indicating each STA; Meanwhile, this Resource Allocation Frame is broadcast or multicast subframe, so that all target STA can receive.Such as, the destination address field of Resource Allocation Frame is set to 0(and AID=0) represent broadcast AID.

In above-mentioned two kinds of execution modes, confirmation response is all difficult to interval SIFS(Short Interframe Space after MD-A-MPDU sends, minimum interFrameGap) complete, therefore the confirmation strategy (Ack Policy) of MPDU in MD-A-MPDU in each subframe can not be generally immediate(immediately) ACK(confirms response) or immediate BlockAck(block confirm response), and should be that delay(postpones) ACK or delay BlockAck.Wherein specify in Resource Allocation Frame the time of delay of each STA transmission confirmation response.

In some embodiments of the invention, in the MPDU of MD-A-MPDU part, multiple MAC service data unit (MAC Service Data Unit, MSDU) can be comprised, i.e. A-MSDU.Now, frame (Frame Body) part in the MPDU shown in Fig. 6, comprises multiple A-MSDU subframe, and this multiple A-MSDU subframe is for same STA, and its structure is as shown in Figure 9.In a MD-A-MPDU, the MPDU in different MD-A-MPDU subframe can be dissimilar (such as control frame or Frame or management frames), but all A-MSDU subframes in same MPDU must be same type (being all generally Frames).

Be appreciated that embodiment of the present invention such scheme such as can be implemented at access point (AP) equipment such as wireless routing implement body.

Therefore, the invention discloses a kind of multiple target convergence transmission method, the method adopts and the downlink data of multiple STA is polymerized to the technical scheme that a multiple target aggregate data frame carries out downlink transfer, achieve following technique effect: for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Be polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA by same grouping, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

It should be noted that, in actual standard, the distribution of preamble and PLCP head is not always generally regular as shown in Figure 4.Two kinds of PPDU forms as shown in figure 14 in 802.11n, L(Legacy, old)-STF(Short Training Field, Short Training territory), L-LTF(Long Training Field, long training domain), HT(High Throughput, high-throughput)-STF, HT-LTF all belong to preamble, and L-SIG, HT-SIG then belong to PLCP head, but are staggered between them.The PPDU form of 802.11ac as shown in figure 15 again, wherein L-STF, L-LTF, VHT(Very High Throughput, high or very high-throughput)-STF, VHT-LTF all belong to preamble, and L-SIG(Signal, signal domain), VHT-SIG-A, VHT-SIG-B then belong to PLCP head, are also staggered between them.

Please refer to Figure 10, the another kind of multiple target convergence transmission method of the embodiment of the present invention, for comprising the system of access point AP and at least two site STA; Method can comprise:

210, a STA receives the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, and a described STA is any one in described at least two STA;

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

In some embodiments of the invention, also can comprise before 210: a described STA receives the group identification notification frame that described AP sends, in described group of identification notification frame, carry the group mark of the first grouping belonging to a described STA and the sequence number of a described STA.

In some embodiments of the invention, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.

Accordingly, step 220 can comprise: a described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and from the subframe corresponding to a described STA, detect the downlink data of a described STA.

In some embodiments of the invention, described multiple target aggregate data frame can comprise: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit, and described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA;

Accordingly, step 220 can comprise: a described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

In some embodiments of the invention, described subframe can comprise: MPDU delimiter, MPDU, and filler PAD; Described MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.

In some embodiments of the invention, last subframe in described multiple target aggregate data frame comprises Resource Allocation Frame, and described Resource Allocation Frame can be broadcast or multicast subframe, sends the concrete running time-frequency resource of confirmation response for indicating each STA.

Above, take STA as executive agent, simple declaration carried out to the multiple target convergence transmission method of the embodiment of the present invention, has introduced in more detail, please refer to shown in Fig. 2, with AP be executive agent multiple target convergence transmission method embodiment in description.

Be appreciated that embodiment of the present invention such scheme such as can at website (STA) equipment, the wireless devices such as mobile device or notebook computer such as such as mobile phone, specifically implement.

Therefore, the invention discloses a kind of multiple target convergence transmission method, the method adopts divides into groups to STA, the downlink data of the multiple STA in same grouping is polymerized to the technical scheme that a multiple target aggregate data frame carries out downlink transfer, achieve following technique effect: by dividing into groups to STA, make, for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Be polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA by same grouping, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

In order to better implement the such scheme of the embodiment of the present invention, be also provided for below coordinating the relevant apparatus implementing such scheme.

Please refer to Figure 11, the embodiment of the present invention provides a kind of access point (AP), for a kind of system comprising described access point AP and at least two site STA; Described AP can comprise:

Aggregation module 310, for being polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA in described at least two STA;

Sending module 320, for described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

Please refer to Figure 11, in some embodiments of the invention, described AP also can comprise:

Described at least two STA, for according at least one factor in Modulation and Coding Scheme MCS, reception antenna number and physical location, are divided into N number of grouping by grouping module 330, N be more than or equal to 1 positive integer, wherein each grouping comprises at least two STA; Accordingly, described sending module 320, specifically for being polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA in same grouping.

Wherein, described grouping module 330, specifically can be used for identical for Modulation and Coding Scheme (MCS), and/or reception antenna number is identical, and/or at least two STA that physical location closes on are divided into one group.

In some embodiments of the invention, described grouping module 330 also for dividing combo to identify for wherein each grouping, and is each STA Allotment Serial Number in each grouping; Described sending module 330, also for the sequence number by each STA in the group mark of the first grouping and described first grouping, is carried in group identification notification frame, sends to each STA in described first grouping; Described first grouping is the arbitrary grouping in described N number of grouping.

In some embodiments of the invention, described aggregation module 310, when specifically can be used for carrying out downlink transfer to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure PLCP head, media access control MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.

In some embodiments of the invention, described aggregation module 310, when specifically can be used for carrying out downlink transfer to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame, described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described second grouping is the arbitrary grouping in described N number of grouping.

The access point of the embodiment of the present invention can be such as wireless router device.

Be appreciated that the function of each functional module of the access point apparatus of the embodiment of the present invention can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in said method embodiment, repeats no more herein.

Therefore, the access point apparatus of the embodiment of the present invention can divide into groups to STA, the downlink data of the multiple STA in same grouping is polymerized to a multiple target aggregate data frame and carries out downlink transfer, thus, achieve following technique effect: by dividing into groups to STA, make, for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Be polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA by same grouping, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

Please refer to Figure 12, the embodiment of the present invention provides a kind of website (STA), for a kind of system comprising an an access point AP and at least two described site STA; Described STA can comprise:

Receiver module 410, for receiving the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, a described STA is any one in described at least two STA;

Detection module 420, detects one's own downlink data for a described STA from described multiple target aggregate data frame.

In some embodiments of the invention, described receiver module 410, also for receiving the group identification notification frame that described AP sends, carries the group mark of the first grouping belonging to a described STA and the sequence number of a described STA in described group of identification notification frame.

In some embodiments of the invention, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part, wherein, described PLCP head comprises indicating bit, described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC, described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA, described detection module 420, specifically can be used for according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and from the subframe corresponding to a described STA, detect the downlink data of a described STA.

In some embodiments of the invention, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit, and described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA; Described detection module 420, specifically can be used for according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

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

Be appreciated that the function of each functional module of the site apparatus of the embodiment of the present invention can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in said method embodiment, repeats no more herein.

Therefore, the site apparatus of the embodiment of the present invention can receive the multiple target aggregate data frame comprising the downlink data of multiple STA of access point apparatus transmission, and therefrom check one's own downlink data, thus, achieve following technique effect: can divide into groups to STA in access point one end, make, for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Support multiple target aggregate data frame, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

Please refer to Figure 13, the embodiment of the present invention provides a kind of multiple target aggregation transfer system, can comprise:

An access point (AP) 300 as described in Figure 11 embodiment, and, at least two websites (STA) 400 as described in Figure 12 embodiment.

The multiple target aggregation transfer system of the embodiment of the present invention such as can WIFI network system.

Be appreciated that the function of each functional module of the multiple target aggregation transfer system of the embodiment of the present invention can according to the method specific implementation in said method embodiment, its specific implementation process can refer to the associated description in said method embodiment, repeats no more herein.

Therefore, the multiple target aggregation transfer system of the embodiment of the present invention, adopt and STA is divided into groups, the downlink data of the multiple STA in same grouping is polymerized to the technical scheme that a multiple target aggregate data frame carries out downlink transfer, achieve following technique effect: by dividing into groups to STA, make, for the multiple STA in same grouping, identical emission parameter can be adopted, without the need to frequently adjusting emission parameter; Be polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA by same grouping, can header overhead be reduced, thus save empty overhead, improve efficiency of transmission.

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiment.

It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other order or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.

One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.

A kind of multiple target convergence transmission method provided the embodiment of the present invention above and relevant device and system are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a multiple target convergence transmission method, is characterized in that, for comprising the system of access point AP and at least two site STA; Described method comprises:

The downlink data of the multiple STA in described at least two STA is polymerized to a multiple target aggregate data frame;

Described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

2. method according to claim 1, is characterized in that, the described downlink data by multiple STA also comprises before being polymerized to a multiple target aggregate data frame:

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

Accordingly, the described downlink data by multiple STA is polymerized to a multiple target aggregate data frame and comprises:

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

3. method according to claim 2, is characterised in that, the described downlink data by the multiple STA in same grouping also comprises before being polymerized to a multiple target aggregate data frame:

For each grouping divides combo to identify, and it is each STA Allotment Serial Number in each grouping;

By the sequence number of each STA in the group mark of the first grouping and described first grouping, be carried in group identification notification frame, send to each STA in described first grouping;

Described first grouping is the arbitrary grouping in described N number of grouping.

4. method according to claim 3, is characterized in that, the described downlink data by the multiple STA in same grouping is polymerized to a multiple target aggregate data frame and comprises:

When downlink transfer is carried out to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure PLCP head, media access control MAC head, and subframe part;

Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA.

5. method according to claim 2, is characterized in that, the described downlink data by the multiple STA in same grouping is polymerized to a multiple target aggregate data frame and comprises:

When downlink transfer is carried out to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, and described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part;

Wherein, described PLCP head comprises and is used to indicate the indicating bit that affiliated Frame is multiple target aggregate data frame, described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA;

Described second grouping is the arbitrary grouping in described N number of grouping.

6. the method according to claim 4 or 5, is characterized in that:

Described subframe comprises: media access control protocol data unit MPDU delimiter, MPDU, and filler PAD; Described MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.

7. method according to claim 6, is characterized in that,

Last subframe in described multiple target aggregate data frame comprises Resource Allocation Frame, sends the concrete running time-frequency resource of confirmation response for indicating each STA.

8. a multiple target convergence transmission method, is characterized in that, for comprising the system of access point AP and at least two site STA; Described method comprises:

One STA receives the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, and a described STA is any one in described at least two STA;

A described STA detects one's own downlink data from described multiple target aggregate data frame.

9. method according to claim 8, is characterized in that, a described STA also comprises before receiving the multiple target aggregate data frame of described AP transmission:

A described STA receives the group identification notification frame that described AP sends, and carries the group mark of the first grouping belonging to a described STA and the sequence number of a described STA in described group of identification notification frame.

10. method according to claim 9, is characterized in that:

Described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit; Described MAC head comprises: transmitting terminal address, group mark, the sequence number bit table of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA;

A described STA detects one's own downlink data and comprises from described multiple target aggregate data frame:

A described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

11. methods according to claim 8, is characterized in that:

Described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part; Wherein, described PLCP head comprises indicating bit, and described MAC head comprises: transmitting terminal address, the number of described multiple STA, the association identification AID list of described multiple STA, the remaining time of present frame interaction sequence, and cyclic redundancy check (CRC) code CRC; Described subframe part comprises the multiple subframes corresponding to described multiple STA, and described subframe comprises the downlink data of corresponding STA;

A described STA is according to the indicating bit in the PLCP head in the multiple target aggregate data frame received, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

12. methods according to claim 10 or 11, is characterized in that:

Described subframe comprises: MPDU delimiter, MPDU, and filler PAD; Described MPDU does not comprise the address1 territory representing receiving terminal address and the address2 territory representing transmitting terminal address, but comprises the AID territory of the AID of corresponding STA.

13. methods according to claim 12, is characterized in that,

14. 1 kinds of access point AP, is characterized in that, for a kind of system comprising described access point AP and at least two site STA; Described access point AP comprises:

Aggregation module, for being polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA in described at least two STA;

Sending module, for described multiple target aggregate data frame is sent to described multiple STA, so that each STA in described multiple STA detects one's own downlink data from described multiple target aggregate data frame.

15. access point AP according to claim 14, is characterized in that, also comprise:

Described at least two STA, for according at least one factor in Modulation and Coding Scheme MCS, reception antenna number and physical location, are divided into N number of grouping by grouping module, N be more than or equal to 1 positive integer, wherein each grouping comprises at least two STA;

Accordingly, described sending module, specifically for being polymerized to a multiple target aggregate data frame by the downlink data of the multiple STA in same grouping.

16. access point AP according to claim 15, is characterized in that:

Described grouping module also for dividing combo to identify for each grouping, and is each STA Allotment Serial Number in each grouping;

Described sending module, also for the sequence number by each STA in the group mark of the first grouping and described first grouping, is carried in group identification notification frame, sends to each STA in described first grouping;

17. access point AP according to claim 16, is characterized in that:

Described aggregation module, during specifically for carrying out downlink transfer to the multiple STA in described first grouping, the downlink data of the multiple STA in described first grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, physical layer convergence procedure PLCP head, media access control MAC head, and subframe part;

18. access point AP according to claim 15, is characterized in that:

Described aggregation module, during specifically for carrying out downlink transfer to the multiple STA in the second grouping, the downlink data of the multiple STA in described second grouping is polymerized to a multiple target aggregate data frame, described multiple target aggregate data frame comprises: targeting sequencing, PLCP head, MAC head, and subframe part;

19. 1 kinds of site STA, is characterized in that, for a kind of system comprising an an access point AP and at least two described site STA; Described STA comprises:

Receiver module, for receiving the multiple target aggregate data frame that described AP sends, the downlink data of the multiple STA at least two STA described in described multiple target aggregate data frame comprises, a described STA is any one in described at least two STA;

Detection module, detects one's own downlink data for a described STA from described multiple target aggregate data frame.

20. site STA according to claim 19, is characterized in that:

Described receiver module, also for receiving the group identification notification frame that described AP sends, carries the group mark of the first grouping belonging to a described STA and the sequence number of a described STA in described group of identification notification frame.

21. site STA according to claim 20, is characterized in that:

Described detection module, specifically for the indicating bit in the PLCP head in the multiple target aggregate data frame that basis receives, the Frame acknowledged receipt of is multiple target aggregate data frame, and confirm that group mark is wherein after the group mark of described first grouping, judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the sequence number bit table of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

22. site STA according to claim 19, is characterized in that:

Described detection module, specifically for the indicating bit in the PLCP head in the multiple target aggregate data frame that basis receives, the Frame acknowledged receipt of is multiple target aggregate data frame, and judge in described multiple target aggregate data frame, whether to comprise the subframe corresponding to a described STA according to the AID list of described multiple STA, if comprise, from described subframe part, then detect the subframe corresponding to a described STA, and detect the downlink data of a described STA from the subframe corresponding to a described STA.

23. 1 kinds of multiple target aggregation transfer systems, is characterized in that, comprising:

One as the access point AP as described in arbitrary in claim 14 to 18, and, at least two as described in arbitrary in claim 19 to 22 as described in site STA.