CN103888909A - Method and device for sending multicast flow in unicast mode - Google Patents
Method and device for sending multicast flow in unicast mode Download PDFInfo
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Abstract
The invention provides a method and device for sending multicast flow in a unicast mode. The method comprises the steps of sending data frames in the VHT PPDU format to other stations belonging to the same user group, wherein multicast identification is contained in the data frames; receiving the data frames in the VHT PPDU format from other stations, judging whether the multicast identification in the data frames is a preset value, and if the multicast identification is the preset value, receiving all space-time flow in the data frames according to the space-time flow number indicated by a unique NSTS field when the group ID of the own user group is matched with the group ID contained in the data frames. By the adoption of the method and device for sending multicast flow in the unicast mode, multicast flow can be sent in the unicast frame mode with less frames, and air interface occupying time is shortened.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and apparatus that sends multicast data flow with mode of unicast.
Background technology
At WLAN (Wireless Local Area Networks, WLAN (wireless local area network)) in, along with the issue of 802.11ac standard, multiuser MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) Engage of standard of technology, a WAP (wireless access point) can be supported more terminal access, and it will be more and more general making WLAN application.But on the other hand, on WLAN, developing multicast video never obtains remarkable progress.This is mainly that therefore this packet loss causes group broadcasting video frequency effect to be greatly affected because WLAN, with respect to cable network transmission, have higher packet loss, and the transmission of multicast frame lacks acknowledgement mechanism and retransmission mechanism in message repeating process.
Therefore in order to improve this impact, a kind of general way is to change group broadcasting video frequency message into clean culture in WAP (wireless access point), to each video message, for each receiving terminal copies portion, and send with unicast frame the terminal that each needs incoming multicast video, thereby reduce packet loss.
But this way at receiving terminal number excessive or video flow large in, because the umber that a message will copy is too much, will occupy in a large number and eat dishes without rice or wine the time, even there is infeasible situation.
Summary of the invention
In view of this; the present invention proposes a kind of method and apparatus that sends multicast data flow with mode of unicast; by multi-user MU PPDU frame format is expanded; multicast or broadcasting stream are sent to two or more the user in potential user group in the mode of clean culture simultaneously; can, in the time using unicast frame to send multicast packet, reduce the quantity forwarded of unicast frame;
A method that sends multicast data flow with mode of unicast, described method comprises:
The website that belongs to same user's group to other sends the Frame of VHT PPDU form; Described Frame comprises multicast mark;
Receive the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, fluxion during according to indicated empty of unique NSTS field, receives all stream when empty in described Frame; Described group of ID is any one integer in 1 to 62.
A device that sends multicast data flow with mode of unicast, described device comprises:
The first sending module, sends the Frame of VHT PPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark;
The second receiver module, for receiving the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, fluxion during according to indicated empty of unique NSTS field, receives all stream when empty in described Frame; Described group of ID is any one integer in 1 to 62.
A method that sends multicast data flow with mode of unicast, described method comprises:
The website that belongs to same user's group to other sends the Frame of VHT PPDU form; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
Receive the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Described group of ID is any one integer in 1 to 62.
A device that sends multicast data flow with mode of unicast, described device comprises:
The second transmitting element, sends the Frame of VHT PPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
The second receiving element, for receiving the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Described group of ID is any one integer in 1 to 62.
By the present invention, can complete the process that multicast data flow is sent with unicast frame with frame still less, save the time that takies air interface, can realize the user that multicast data flow is decomposed to multiuser MIMO simultaneously and send together with unicast frame in organizing.
Accompanying drawing explanation
Fig. 1 is a kind of method flow diagram that sends multicast data flow with mode of unicast that the embodiment of the present invention provides;
Fig. 2 is the VHT PPDU frame structure of IEEE802.11ac regulation;
Fig. 3 is the detailed structure view of the VHT-SIG-A1 part of the MU PPDU of IEEE802.11ac regulation;
Fig. 4 is the detailed structure view of the VHT-SIG-A2 part of the MU PPDU of IEEE802.11ac regulation;
Fig. 5 be the embodiment of the present invention one provide MU PPDU is expanded after the detailed structure view of VHT-SIG-A1 part;
Fig. 6 be the embodiment of the present invention one provide MU PPDU is expanded after the detailed structure view of VHT-SIG-A2 part;
Fig. 7 is a kind of method flow diagram that sends multicast data flow with mode of unicast that the embodiment of the present invention two provides;
Fig. 8 be the embodiment of the present invention two provide MU PPDU is expanded after the detailed structure view of VHT-SIG-A1 part;
Fig. 9 be the embodiment of the present invention two provide MU PPDU is expanded after the detailed structure view of VHT-SIG-A2 part;
Figure 10 is a kind of building-block of logic that sends the device of multicast data flow with mode of unicast that the embodiment of the present invention three provides;
Figure 11 is a kind of building-block of logic that sends the device of multicast data flow with mode of unicast that the embodiment of the present invention four provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment mono-
The present embodiment proposes a kind of method that sends multicast data flow with mode of unicast, by to multi-user MU (Multiple User, multi-user) PPDU(PLCP Protocol Data Unit, Physical layer convergence protocol data cell) frame format expands, multicast or broadcasting stream are carried out forming after Space Time Coding empty time stream (STS, space time streams) send to two or more the user in potential user group in the mode of clean culture simultaneously, can be in the time using unicast frame to send multicast packet, reduce the quantity forwarded of unicast frame, saving takies the time of air interface, wherein, described when empty stream refer to the data flow after encoding in conjunction with space division multiple access coding techniques and time division multiple access coding techniques.
The present embodiment proposes a kind of method that sends multicast data flow with mode of unicast, is applied to the website in wireless communication system; Wherein said website generally includes the AP(Access Point in wireless communication system, WAP (wireless access point)) or STA(Station, wireless stations).Refer to Fig. 1, the method comprises:
S101, the website that belongs to same user group to other send VHT(Very High Throughput, high-throughput) Frame of PPDU form; Described Frame comprises multicast mark;
S102, receive the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, according to unique NSTS(Number of space time streams, fluxion when empty) fluxion when indicated empty of field, receive all stream when empty in described Frame; Wherein said group of ID is any one integer in 1 to 62.
Refer to Fig. 2, Fig. 2 is the VHT PPDU frame structure of IEEE802.11ac regulation, in this frame structure DATA field for carrying user data, stream when agreement stipulates that 8 of each VHT PPDU frame portabilities are empty; VHT-SIG-A(high-throughput signal field A) field comprises 6 bytes, is divided into VHT-SIG-A1(high-throughput signal field A1) and VHT-SIG-A2(high-throughput signal field A2) two parts;
Wherein, can be divided into again SU(Single User, alone family according to VHT PPDU frame described in purposes) PPDU and MU PPDU; SU PPDU, i.e. alone family PPDU, represents that this PPDU will send to single terminal; MU PPDU, i.e. multi-user PPDU, represents that this PPDU will send to multiple terminals to receive simultaneously.
For MU PPDU, be used in multiuser MIMO, the method that sends multicast data flow with mode of unicast that the present embodiment proposes is by expanding to realize to MU PPDU frame format.Processing procedure when detailed construction to the MU PPDU frame of IEEE802.11ac regulation in prior art, and website is below received MUPPDU frame is described in further detail;
Refer to Fig. 3 and Fig. 4, Fig. 3 and Fig. 4 are respectively the VHT-SIG-A1 of MU PPDU frame and the detailed construction of VHT-SIG-A2 part of IEEE802.11ac regulation, and wherein the implication of each main field representative is as following table:
First, in the time that a certain website (such as AC) in described wireless communication system sends unicast data frames to multiple targeted sites; Described multiple targeted sites is divided into several user's groups in advance, and one of them user's group can comprise 4 users, and each user receives at most 4 streams when empty, and the unicast data frames that send Source Site can be transferred to two or more targeted sites simultaneously.In the time that targeted sites is received this Frame, whether the ID user entrained with Group id field who first checks user's group under self organizes ID consistent; If consistent, represent that this website is the recipient of this Frame, so according to the position from described customer group, stream while receiving indicated empty of MU corresponding in NSTS field.
If the concrete sequence of four websites that active user's group comprises is (website 1, website 3, website 2, website 4); If website 2 is described targeted sites, website 2 is the 3rd in the position of user group, with the MU[2 in NSTS field] corresponding, so when website 2 is received described Frame, website 2 receives MU[2 in described NSTS field] indicated flow when empty.Wherein, described MU[2] indicated when empty stream specifically refer to: if carry 8 streams when empty in current this Frame, MU[0 in NSTS field]-MU[3] value is 2, MU[2 so] two of indications stream when empty, be respectively 8 articles of carrying in described Frame the 5th and the 6th article in stream when empty; Same reason, if MU[0 in described NSTS field] value is 1, MU[1] value is 2, as MU[2] value while being 2 indicated when empty stream be 8 articles of carrying in described Frame the 4th and the 5th article in stream when empty.
Below to the detailed construction after described MU PPDU frame being expanded in the present embodiment, and the processing procedure of website while receiving the MU PPDU frame after expansion is described in further detail
Please refer to Fig. 5 and Fig. 6, the present embodiment preferred embodiment in, as shown in Figure 5 and Figure 6, wherein the implication of each main field representative is as following table for the detailed construction that MU PPDU is expanded to rear VHT-SIG-A1 and VHT-SIG-A2 part:
Wherein, the represented implication of other fields is identical with prior art, repeats no more;
Can be found out by above chart, in MU PPDU after expansion, increase in the present embodiment ALL-STS-FLAG field (being described multicast mark), NSTS field is no longer divided into 4 users, only uses original MU[0] NSTS represent the number flowing at one's leisure of carrying in this PPDU; MU Coding field, also no longer distinguishes user, and flowing at one's leisure of representing that this PPDU carries used same FEC coded format; Meanwhile, in the MU PPDU after expansion, increased MSC(Modulation and Coding Scheme, modulation and coding strategy) field, represent that this PPDU carries the MCS of flow data at one's leisure.
What deserves to be explained is, above is only preferred embodiment to the expansion of MU PPDU, and the setting of described ALL-STS-FLAG field also can be arranged on other reserved fields in VHT-SIG-A field; In MU PPDU after expansion, NSTS field also can be arranged on any 3 successive bits in the 11st to the 22nd bit (B10～B21) in VHT-SIG-A1 field, or any 3 successive bits in other reserved bit positions of VHT-SIG-A field; Described MU Coding field also can be arranged in other reserved bit position in described VHT-SIG-A field.
In the present embodiment, the detailed construction of the VHT-SIG-B of the MU PPDU after described expansion part keeps identical with the SU PPDU form of IEEE802.11ac regulation with modulated process.
In the present embodiment, in the time that ALL-STS-FLAG field value is 0, still resolve described PPDU according to IEEE801.11ac standard, no longer this is described in detail in this application.
Processing procedure while below website being received to the MU PPDU frame after above-mentioned expansion describes in detail;
In the present embodiment, when the arbitrary website (such as STA) in described wireless communication system is during as multicast source, according to the MU PPDU frame format after above-mentioned improvement, send unicast data frames to other websites that belong to same customer group with this website; When described other websites are received this Frame, resolve the VHT-SIG-A part of this Frame, if ALL-STS-FLAG field value is 1, further resolve group id field, whether check under self that the ID user entrained with Group id field of user's group organizes ID mates; If checking out under self that the ID user entrained with Group id field of user's group organizes ID mates, represent that this website is the recipient of this Frame; If now carry 8 empty time streams in this Frame, the value of NSTS field is 8 so, so this website receives all 8 flow datas when empty of indicating in NSTS field.
From above description, use the MU PPDU after expansion in the present embodiment multicast or broadcasting stream can be converted to unicast frame, issue two or more users in the affiliated customer group of targeted sites, can reduce the quantity of unicast frame.
Embodiment bis-
The present embodiment proposes a kind of method that sends multicast data flow with mode of unicast; by multi-user MUPPDU frame format is expanded; by after multicast or broadcasting stream and unicast stream hybrid package; send to two or more the user in potential user group in the mode of clean culture simultaneously; can be in the time using unicast frame to send multicast packet; reduce the quantity forwarded of unicast frame, save the time that takies air interface;
The present embodiment proposes a kind of method that sends multicast data flow with mode of unicast, is applied to the website in wireless communication system; Wherein said website generally includes AP or the STA in wireless communication system.Refer to Fig. 7, the method comprises:
S701, the website that belongs to same user's group to other send the Frame of VHT PPDU form; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
S702, receive the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Wherein, described group of ID is any one integer in 1 to 62.
The method with mode of unicast transmission multicast data flow that the present embodiment proposes is still by MU PPDU frame format is expanded to realize, in the present embodiment, and stream when stream and multicast are empty when the MU PPDU after expansion carries clean culture sky simultaneously.
Refer to Fig. 8 and Fig. 9, the present embodiment preferred embodiment in, as shown in Figure 8 and Figure 9, wherein the implication of each main field representative is as following table for the detailed construction that MU PPDU is expanded to rear VHT-SIG-A1 and VHT-SIG-A2 part:
Wherein, the represented implication of other fields is identical with prior art, repeats no more;
Can be found out by above chart, in the present embodiment, in the MU PPDU after expansion, increase Hybrid-Flag field (being described multicast mark) and MC Position field (being described station location marker); MU field is divided into 4 users, is respectively MU[0]-MU[3], but different be MU[0]-MU[3] and in have a user field to deposit multicast fluxion when empty;
Wherein, flow at one's leisure (the comprising clean culture and multicast) of carrying as PPDU all used same FEC (Forward error correction, forward error correction) when coding, MU Coding field is arranged on B2 bit, and now MC Position field is arranged on B4-B5 bit; The FEC coded system using when flowing at one's leisure of carrying of PPDU when incomplete same, MU Coding field is arranged on B2 and B4-B7 bit, and now MC Position field is arranged on B8-B9 bit;
What deserves to be explained is, above is only preferred embodiment to the expansion of MU PPDU, and described Hybrid-Flag field also can be arranged on other reserved bit in VHT-SIG-A field; Described MUCoding field and MC Position field also can be arranged in other reserved bit position in VHT-SIG-A.
In the present embodiment, the detailed construction of the VHT-SIG-B of the MU PPDU after described expansion part is identical with the MU PPDU form of IEEE802.11ac regulation with modulated process.
In the present embodiment, in the time that Hybrid-Flag field value is 0, still resolve described PPDU according to IEEE801.11ac standard, no longer this is described in detail in this application.
Processing procedure while below website being received to the MU PPDU frame after above-mentioned expansion describes in detail;
In the present embodiment, when the website in described wireless communication system is during as multicast source, according to the MU PPDU frame format after above-mentioned improvement in the present embodiment, send unicast data frames to other websites that belong to same customer group with this website; When described other websites are received this Frame, resolve the VHT-SIG-A part of this Frame, if Hybrid-Flag field value is 1, further resolve Group id field, whether check under self that the ID user entrained with Group id field of user's group organizes ID mates; If checking out under self that the ID user entrained with Group id field of user's group organizes ID mates, represent that this website is the recipient of this Frame; Now our station press and impinge upon under customer location in user's group receive the indicated clean culture of MU corresponding in NSTS field stream when empty, receive the indicated multicast of MC Position field stream when empty simultaneously; Such as, in the time that MC Position field value is 2, represent MU[2 in NSTS field] stream while representing multicast data flow empty.
From above description, use in the present embodiment the MU PPDU after expansion multicast or broadcasting stream and clean culture can be flowed after hybrid package when empty, issue under targeted sites two or more users in customer group, can reduce the quantity of unicast frame.
Embodiment tri-
Refer to Figure 10, a kind of device 100 that sends multicast data flow with mode of unicast is also proposed in the application one embodiment, in the hardware structure wherein relating to as the device of carrying apparatus of the present invention 100, generally include CPU, internal memory, nonvolatile memory, IO interface and other hardware.Be embodied as example with software, apparatus of the present invention 100 can be understood as the computer program being carried in internal memory conventionally, the logic device that the software and hardware forming after moving by CPU combines; Stating device 100 comprises:
The first sending module 101, sends the Frame of VHTPPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark;
The first receiver module 102, for receiving the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, fluxion during according to indicated empty of unique NSTS field, receives all stream when empty in described Frame; Described group of ID is any one integer in 1 to 62.
In the present embodiment, described multicast mark length is 1 bit, is arranged in the reserved bit position in VHT-SIG-A field; Described unique NSTS field length is 3 bits, is arranged in VHT-SIG-A1 field in any 3 successive bits in the 11st to the 22nd bit.
In the present embodiment, in described Frame, also comprise code field and MSC field;
Described code field length is 1 bit, is arranged on the 3rd bit in VHT-SIG-A2 field, or is arranged on other reserved bit position in described VHT-SIG-A field;
Described MCS field, described MCS field length is 4 bits, is arranged on the 5th in VHT-SIG-A2 field to the 8th bit.
Embodiment tetra-
Refer to Figure 11, a kind of device 110 that sends multicast data flow with mode of unicast is also proposed in the application one embodiment, in the hardware structure wherein relating to as the device of carrying apparatus of the present invention 110, generally include CPU, internal memory, nonvolatile memory, IO interface and other hardware.Be embodied as example with software, apparatus of the present invention 110 can be understood as the computer program being carried in internal memory conventionally, the logic device that the software and hardware forming after moving by CPU combines; Stating device 110 comprises:
The second transmitting element 111, sends the Frame of VHT PPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
The second receiving element 112, for receiving the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Described group of ID is any one integer in 1 to 62.
In the present embodiment, when when described clean culture is empty, fluxion is empty from described multicast, the deposit position of fluxion in described MU field is different.
In the present embodiment, described multicast mark length is 1 bit, is arranged in the reserved bit position in VHT-SIG-A field.
In the present embodiment, when all when flow data uses same FEC coded format when empty in described Frame, described station location marker is arranged in other reserved bit in the 5th in VHT-SIG-A2 field, the 6th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit in VHT-SIG-A2 field;
In the time that in described Frame, all FEC coded formats that flow data uses when empty are incomplete same, described station location marker is arranged in other reserved bit in the 9th in VHT-SIG-A2 field, the 10th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit and the 5th to 7 bits in VHT-SIG-A2 field.
By the description of above embodiment, it will be appreciated by those skilled in the art that in embodiment, the module in device can be merged into a module, also can further split into multiple submodules.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (14)
1. a method that sends multicast data flow with mode of unicast, is characterized in that, described method comprises:
The website that belongs to same user's group to other sends the Frame of high-throughput Physical layer convergence protocol data cell VHT PPDU form; Described Frame comprises multicast mark;
Receive the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, according to unique fluxion when indicated empty of fluxion NSTS field when empty, receive all stream when empty in described Frame; Described group of ID is any one integer in 1 to 62.
2. the method for claim 1, is characterized in that, described multicast mark length is 1 bit, and being arranged on high-throughput signal field A is in the reserved bit position in VHT-SIG-A field;
Described unique NSTS field length is 3 bits, is arranged on high-throughput signal field A1 and is in VHT-SIG-A1 field in any 3 successive bits in the 11st to the 22nd bit.
3. the method for claim 1, is characterized in that, also comprises code field and modulation and coding strategy MSC field in described Frame; Described code field length is 1 bit, and being arranged on high-throughput signal field A2 is the 3rd bit in VHT-SIG-A2 field, or is arranged on other reserved bit position in described VHT-SIG-A field; Described MCS field length is 4 bits, is arranged on the 5th in VHT-SIG-A2 field to the 8th bit.
4. a device that sends multicast data flow with mode of unicast, is characterized in that, described device comprises:
The first sending module, sends the Frame of VHT PPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark;
The second receiver module, for receiving the Frame from the VHT PPDU form of other websites, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, fluxion during according to indicated empty of unique NSTS field, receives all stream when empty in described Frame; Described group of ID is any one integer in 1 to 62.
5. device as claimed in claim 4, is characterized in that, described multicast mark length is 1 bit, is arranged in the reserved bit position in VHT-SIG-A field; Described unique NSTS field length is 3 bits, is arranged in VHT-SIG-A1 field in any 3 successive bits in the 11st to the 22nd bit.
6. device as claimed in claim 4, is characterized in that, also comprises code field and MSC field in described Frame; Described code field length is 1 bit, is arranged on the 3rd bit in VHT-SIG-A2 field, or is arranged on other reserved bit position in described VHT-SIG-A field; Described MCS field length is 4 bits, is arranged on the 5th in VHT-SIG-A2 field to the 8th bit.
7. a method that sends multicast data flow with mode of unicast, is characterized in that, described method comprises:
The website that belongs to same user's group to other sends the Frame of VHT PPDU form; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
Receive the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Described group of ID is any one integer in 1 to 62.
8. method as claimed in claim 7, is characterized in that, when when described clean culture is empty, fluxion is empty from described multicast, the deposit position of fluxion in described MU field is different.
9. method as claimed in claim 7, is characterized in that, described multicast mark length is 1 bit, is arranged in the reserved bit position in VHT-SIG-A field.
10. method as claimed in claim 7, it is characterized in that, when all when flow data uses same forward error correction FEC coded format when empty in described Frame, described station location marker is arranged in other reserved bit in the 5th in VHT-SIG-A2 field, the 6th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit in VHT-SIG-A2 field;
In the time that in described Frame, all FEC coded formats that flow data uses when empty are incomplete same, described station location marker is arranged in other reserved bit in the 9th in VHT-SIG-A2 field, the 10th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit and the 5th to 7 bits in VHT-SIG-A2 field.
11. 1 kinds send the device of multicast data flow with mode of unicast, it is characterized in that, described device comprises:
The second transmitting element, sends the Frame of VHT PPDU form for belong to the website of same user group to other; Described Frame comprises multicast mark and station location marker; The deposit position of fluxion in MU field when wherein said station location marker indication multicast is empty;
The second receiving element, for receiving the Frame from the VHT PPDU form of other wireless terminals, judge whether the multicast mark in described Frame is preset value, if, when under self, the group ID of user's group mates with the group ID carrying in described Frame, when empty according to clean culture indicated in MU field, fluxion receives clean culture corresponding in described Frame stream when empty, and fluxion receives multicast corresponding in described Frame and flows when empty when empty by the multicast shown in described station location marker indication in MU field simultaneously; Described group of ID is any one integer in 1 to 62.
12. devices as claimed in claim 11, is characterized in that, when when described clean culture is empty, fluxion is empty from described multicast, the deposit position of fluxion in described MU field is different.
13. devices as claimed in claim 11, is characterized in that, described multicast mark length is 1 bit, is arranged in the reserved bit position in VHT-SIG-A field.
14. devices as claimed in claim 11, it is characterized in that, when all when flow data uses same FEC coded format when empty in described Frame, described station location marker is arranged in other reserved bit in the 5th in VHT-SIG-A2 field, the 6th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit in VHT-SIG-A2 field;
In the time that in described Frame, all FEC coded formats that flow data uses when empty are incomplete same, described station location marker is arranged in other reserved bit in the 9th in VHT-SIG-A2 field, the 10th bit or VHT-SIG-A field; Code field in described Frame, is arranged in the 3rd bit and the 5th to 7 bits in VHT-SIG-A2 field.
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| CN201410116788.2A CN103888909B (en) | 2014-03-26 | 2014-03-26 | A kind of method and apparatus that multicast data flow is sent with mode of unicast |
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| CN104270724A (en) * | 2014-09-19 | 2015-01-07 | 杭州华三通信技术有限公司 | Method and device for adjusting multicast physical sending rate |
| WO2017008561A1 (en) * | 2015-07-13 | 2017-01-19 | 中兴通讯股份有限公司 | Multicast method, multicast relay device and system |
| CN105323042B (en) * | 2014-07-11 | 2018-09-25 | 启碁科技股份有限公司 | Promote the method and wireless module of efficiency |
| WO2019205803A1 (en) * | 2018-04-26 | 2019-10-31 | 华为技术有限公司 | Harq technology-based communication method, device, and system |
| CN111726193A (en) * | 2019-03-18 | 2020-09-29 | 华为技术有限公司 | Information indication method and device and data transmission system |
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| CN105323042B (en) * | 2014-07-11 | 2018-09-25 | 启碁科技股份有限公司 | Promote the method and wireless module of efficiency |
| CN104270724A (en) * | 2014-09-19 | 2015-01-07 | 杭州华三通信技术有限公司 | Method and device for adjusting multicast physical sending rate |
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| WO2017008561A1 (en) * | 2015-07-13 | 2017-01-19 | 中兴通讯股份有限公司 | Multicast method, multicast relay device and system |
| CN106656823A (en) * | 2015-07-13 | 2017-05-10 | 中兴通讯股份有限公司 | Multicast method, multicast relay device and system |
| WO2019205803A1 (en) * | 2018-04-26 | 2019-10-31 | 华为技术有限公司 | Harq technology-based communication method, device, and system |
| CN111726193A (en) * | 2019-03-18 | 2020-09-29 | 华为技术有限公司 | Information indication method and device and data transmission system |
| CN111726193B (en) * | 2019-03-18 | 2023-04-07 | 华为技术有限公司 | Information indication method and device and data transmission system |
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| CN103888909B (en) | 2017-09-15 |
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