CN104038902B - A kind of transmission of multicast data packet method and device - Google Patents
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Abstract
The embodiment of the present invention provides a kind of transmission of multicast data packet method and device, is related to the communications field, it is specified that how with the mode of multicast AID multicast packet to be sent to STA.This method includes：Access point AP distributes corresponding Multicast Association identifier AID for site STA, wherein, multicast AID is set in the short media access control MAC frame head of multicast packet；AP sends multicast packet at least two STA, so that at least two STA judge whether multicast packet is multicast packet corresponding at least two STA according to multicast AID, wherein, at least two STA are located in same multicast group.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of transmission of multicast data packet method and devices.
Background technology
WLAN (Wireless Local Area Networks, Wireless LAN) is using wireless channel as transmission matchmaker
The computer LAN of Jie is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, usual energy
Enough support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for a large amount of
The application of low-power consumption sensor type, such as meter reading, environmental monitoring, smart home etc..Illustratively, these STA can distinguish
It is arranged on water meter, ammeter, on gas meter, and these water meters, ammeter, gas meter can be under the jurisdiction of different or identical company,
And these companies can be by wireless aps (access point, access point), with the identical or different period respectively to this
A little water meters, ammeter, gas meter send information or these water meters, ammeter, gas meter are updated.Therefore, in 802.11ah
Application scenarios under, AP can send the multicast information of different cycles, different content to different STA.However, at present
Do not define how that multicast packet is sent to STA by the mode with multicast AID in the standard of 802.11ah.
Invention content
The embodiment of the present invention provides a kind of transmission of multicast data packet method and device, it is specified that how with multicast AID's
Multicast packet is sent to STA by mode.
The embodiment of the present invention adopts the following technical scheme that：
In a first aspect, the embodiment of the present invention provides a kind of transmission of multicast data packet method, this method includes：
Access point AP distributes corresponding Multicast Association identifier AID for site STA, wherein, the multicast AID is set to institute
It states in the short media access control MAC frame head of multicast packet；
The AP sends the multicast packet at least two STA, so that at least two STA is according to described group
Broadcast AID and judge whether the multicast packet is multicast packet corresponding at least two STA, wherein, it is described at least
Two STA are located in same multicast group.
In the first possible implementation, according in a first aspect, the method further includes：
The AP calculates its corresponding multicast partial association identifier PAID for STA；
The AP sets the multicast PAID in the physical layer convergence procedure protocol Data Unit of the multicast packet
In PPDU frame formats.
In second of possible realization method, with reference to first aspect or the first possible realization method, if described
PPDU frame formats are short leading frame format, then the multicast PAID is set in the signal domain of the short leading frame format；Alternatively,
If the PPDU frame formats are long preambles frame format, the multicast PAID is set to the long preambles frame format
In signal A domains.
In the third possible realization method, with reference to first aspect or the first possible realization method or second can
The realization method of energy, the short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, described
Multicast AID is set in first address field.
In the 4th kind of possible realization method, with reference to first aspect or the first possible realization method to the third can
The realization method of energy, the length of first address field is 16 bits, wherein, the slave least significant bit of first address field is opened
The 14th bit to begin is flag, wherein, the flag is used to indicate whether AID is multicast AID.
In the 5th kind of possible realization method, with reference to first aspect or the first possible realization method to the 4th kind can
The realization method of energy, before the AP sends the multicast packet at least two STA, the method further includes：
The AP sends broadcast singal to the STA, so that the STA knows that the AP will send the multicast packet
It wraps to the STA.
Second aspect, the embodiment of the present invention provide a kind of transmission of multicast data packet method, and this method includes：
STA receives the multicast packet that AP is sent, wherein, the multicast packet is sent to by the AP including described
At least two STA including STA, multicast AID is set to the short media access of the multicast packet in the multicast packet
It controls in mac frame head；
The STA judges whether the multicast packet is multicast packet corresponding to the STA according to the multicast AID
Packet.
In the first possible implementation, according to second aspect, the short mac frame head includes frame control domain, first
Address field, the second address field and sequence control domain, the multicast AID are set in first address field.
In second of possible realization method, with reference to second aspect or the first possible realization method, described first
The length of address field is 16 bits, wherein, the 14th since least significant bit the bit of first address field is mark
Position, wherein, the flag is used to indicate whether AID is multicast AID.
In the third possible realization method, with reference to second aspect or the first possible realization method or second can
The realization method of energy, before the multicast packet of at least two STA reception AP transmissions, the method further includes：
The STA receives the broadcast singal that the AP is sent；
The STA knows that the AP will send the multicast packet to the STA.
In the 4th kind of possible realization method, with reference to second aspect or the first possible realization method to the third can
The realization method of energy, the method further include：
If being provided with the multicast PAID in the multicast PPDU frame formats, the STA sentences according to the multicast PAID
Whether the multicast packet that breaks is multicast packet corresponding to the STA.
The third aspect, the embodiment of the present invention provide a kind of AP, including：
Processing module, for distributing corresponding multicast AID for STA, wherein, the multicast AID is set to the multicast number
According in the short media access control MAC frame head of packet；
Sending module, for sending the multicast packet at least two STA, so that at least two STA roots
Judge whether the multicast packet is multicast packet corresponding at least two STA according to the multicast AID, wherein,
At least two STA is located in same multicast group.
In the first possible implementation, according to the third aspect, the processing module is additionally operable to calculate it for STA
The corresponding multicast PAID and setting multicast PAID is in the physical layer convergence procedure protocol data list of the multicast packet
In first PPDU frame formats.
In second of possible realization method, with reference to the third aspect or the first possible realization method, if described
PPDU frame formats are short leading frame format, then the multicast PAID is set in the signal domain of the short leading frame format；Alternatively,
If the PPDU frame formats are long preambles frame format, the multicast PAID is set to the long preambles frame format
In signal A domains.
In the third possible realization method, with reference to the third aspect or the first possible realization method or second can
The realization method of energy, the short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, described
Multicast AID is set in first address field.
In the 4th kind of possible realization method, with reference to the third aspect or the first possible realization method to the third can
The realization method of energy, the length of first address field is 16 bits, wherein, the slave least significant bit of first address field is opened
The 14th bit to begin is flag, wherein, the flag is used to indicate whether AID is multicast AID.
In the 5th kind of possible realization method, with reference to the third aspect or the first possible realization method to the 4th kind can
The realization method of energy, the sending module are additionally operable to：
Broadcast singal is sent to the STA, so that the STA knows that the AP will send the multicast packet to institute
State STA.
Fourth aspect, the embodiment of the present invention provide a kind of STA, including：
Receiving unit, for receiving the multicast packet of AP transmissions, wherein, the multicast packet is sent to by the AP
At least two STA including the STA, multicast AID is set to the short of the multicast packet in the multicast packet
In media access control MAC frame head；
Judging unit, for judging whether the multicast packet is group corresponding to the STA according to the multicast AID
Unicast packets.
In the first possible implementation, with reference to fourth aspect, the short mac frame head includes frame control domain, first
Address field, the second address field and sequence control domain, the multicast AID are set in first address field.
In second of possible realization method, with reference to fourth aspect or the first possible realization method, described first
The length of address field is 16 bits, wherein, the 14th since least significant bit the bit of first address field is mark
Position, wherein, the flag is used to indicate whether AID is multicast AID.
In the third possible realization method, with reference to fourth aspect or the first possible realization method or second can
The realization method of energy, the STA are further included：
The receiving unit is additionally operable to receive the broadcast singal that the AP is sent；
Acquiring unit, for knowing that the AP will send the multicast packet.
In the 4th kind of possible realization method, with reference to second aspect or the first possible realization method to the third can
The realization method of energy, the judging unit are additionally operable to：
If being provided with the multicast PAID in the multicast PPDU frame formats, described group is judged according to the multicast PAID
Whether unicast packets are multicast packet corresponding to the STA.
The transmission of multicast data packet method and device that the embodiment of the present invention is provided distributes corresponding group by AP for STA
AID is broadcast, wherein, multicast AID is set in the short mac frame head of multicast packet and AP sends multicast number at least two STA
According to packet, so that at least two STA judge whether multicast packet is multicast corresponding at least two STA according to multicast AID
Data packet, wherein, at least two STA are located in same multicast group.With this solution, since AP is corresponding group of STA distribution
AID is broadcast, and multicast packet is sent at least two STA, so that at least two STA judge multicast packet according to multicast AID
Whether packet be multicast packet corresponding at least two STA, therefore, it is specified that how with the mode of multicast AID by multicast number
According to being sent to STA.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow chart one of data pack transmission method provided in an embodiment of the present invention；
Fig. 2 is the structure diagram of traditional mac frame head；
Fig. 3 is the structure diagram one of short mac frame head provided in an embodiment of the present invention；
Fig. 4 is the structure diagram two of short mac frame head provided in an embodiment of the present invention；
Fig. 5 is the structure diagram of AID provided in an embodiment of the present invention；
Fig. 6 is the flowchart 2 of data pack transmission method provided in an embodiment of the present invention；
Fig. 7 is the structure diagram of the characteristic value of AID provided in an embodiment of the present invention；
Fig. 8 is the structure diagram one of PDDU frame formats provided in an embodiment of the present invention；
Fig. 9 is the structure diagram two of PDDU frame formats provided in an embodiment of the present invention；
Figure 10 is the flow chart 3 of data pack transmission method provided in an embodiment of the present invention；
Figure 11 is the flow chart four of data pack transmission method provided in an embodiment of the present invention；
Figure 12 is the structure diagram of AP that one embodiment of the invention provides；
Figure 13 is the structure diagram one of STA that one embodiment of the invention provides；
Figure 14 is the structure diagram two of STA that one embodiment of the invention provides；
Figure 15 is the structure diagram of access point AP that another embodiment of the present invention provides；
Figure 16 is the structure diagram of site STA that another embodiment of the present invention provides.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of transmission of multicast data packet method, as shown in Figure 1, this method includes：
S101, AP distribute corresponding multicast AID for STA.
Wherein, multicast AID is set in the short media access control MAC frame head of multicast packet, the flag of multicast AID
It is provided with first flag.
WLAN (Wireless Local Area Networks, Wireless LAN) is using wireless channel as transmission matchmaker
The computer LAN of Jie is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, usual energy
Enough support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for a large amount of
The application of low-power consumption sensor type, such as meter reading, environmental monitoring, smart home etc..
Under the application scenarios of 802.11ah, when AP will send multicast packet to multiple STA, AP is first had to to be sent
Data handled.Data carry out package in MAC layer first, at this point, AID is set in the short mac frame head of data packet；With
Afterwards, the data after MAC layer package are sent to PHY layer and carry out package, wherein, the detailed process of package will be in following embodiments
In be described, details are not described herein again.
It should be noted that the form of traditional mac frame head, as shown in Fig. 2, traditional mac frame head include frame control domain,
Duration field or identification field, the first address field, the second address field, third address field, sequence control domain, the 4th address field, clothes
Business quality control domain and High-speed Control domain, wherein, frame control domain, duration field, sequence control domain and service quality control domain
Length be 2 bytes, the first address field, the second address field, third address field and the 4th address field length be 6 bytes,
The length in High-speed Control domain is 4 bytes.
However, under the application scenarios of 802.11ah, low-power consumption application can more effectively be supported using short mac frame head,
As shown in figure 3, short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, wherein, frame control
The length in domain, the first address field and sequence control domain is 2 bytes, and the length of the second address field is 6 bytes, and AID is set to
In first address field, BSSID (basic service set identifier, basic service set identifier) is set to the second ground
In the domain of location.
It should be noted that according to subscriber policy, short mac frame head provided in an embodiment of the present invention can also including third
Location domain, as shown in figure 4, the length of third address field is 6 bytes.
Short mac frame head eliminates duration field, service quality control domain, High-speed Control compared to traditional mac frame head
Domain and the 4th address field can not only reduce the length of mac frame head, improve the efficiency of transmission data, additionally it is possible to reduce the work(of STA
Consumption, has saved the energy.
You need to add is that AID is set to the form in the first address field, as shown in figure 5, the length due to the first address field
It spends for 2 bytes, i.e. 16 bits.According to the rules, the 1st since least significant bit the bit of the first address field to the 13rd ratio
The ad hoc characteristic value for being set to AID, the 14th since least significant bit the bit of the first address field is flag, wherein, mark
Know position and be used to indicate whether AID is multicast AID, the 15th since least significant bit the bit of the first address field and the 16th
Bit is set as numerical value 1.
When data packet will be used as multicast packet to send, AP distributes corresponding multicast AID for STA, wherein, multicast AID
It being set in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with first flag, and
The value of first flag is 1.
S102, AP send multicast packet at least two STA, so that at least two STA are according to multicast AID judgement groups
Whether unicast packets are multicast packet corresponding at least two STA.
Wherein, at least two STA are located in same multicast group.
AP sends multicast packet at least two STA, so that at least two STA judge multicast number according to multicast AID
Whether it is multicast packet corresponding at least two STA according to packet.
It should be noted that the AID that the embodiment of the present invention is provided writes according to binary system, first flag is used to refer to
It is then multicast packets to show data packet, and therefore, first flag is numerical value 1.When flag bit is not provided with first flag, then illustrate the data
Bao Buwei multicast packets, the data packet cannot be sent to STA by multicast.
You need to add is that according to the difference of subscriber policy, the value of first flag is also different, and first flag can be number
Value 1, or 0 grade others numerical value, the present invention are not limited.
The transmission of multicast data packet method that the embodiment of the present invention is provided distributes corresponding multicast AID by AP for STA,
Wherein, multicast AID is set in the short mac frame head of multicast packet and AP sends multicast packet at least two STA,
So that at least two STA judge whether multicast packet is multicast packet corresponding at least two STA according to multicast AID
Packet, wherein, at least two STA are located in same multicast group.With this solution, since AP is the corresponding multicast of STA distribution
AID, and multicast packet is sent at least two STA, so that at least two STA judge multicast packet according to multicast AID
Whether be multicast packet corresponding at least two STA, therefore, it is specified that how with the mode of multicast AID by multicast packet
It is sent to STA.
The embodiment of the present invention provides a kind of transmission of multicast data packet method, as shown in fig. 6, this method includes：
S201, AP distribute corresponding multicast AID for STA.
Wherein, multicast AID is set in the short media access control MAC frame head of multicast packet, the flag of multicast AID
It is provided with first flag.
WLAN (Wireless Local Area Networks, Wireless LAN) is using wireless channel as transmission matchmaker
The computer LAN of Jie is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, usual energy
Enough support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for a large amount of
The application of low-power consumption sensor type, such as meter reading, environmental monitoring, smart home etc..
Under the application scenarios of 802.11ah, when AP will send multicast packet to multiple STA, AP is first had to to be sent
Data handled.Data carry out package in MAC layer first, at this point, AID is set in the short mac frame head of data packet；With
Afterwards, the data after MAC layer package are sent to PHY layer and carry out package.
In the following, by illustrating successively to data in MAC layer package and in the process of PHY layer package.
Traditional mac frame head includes frame control domain, duration field or identification field, the first address field, the second address field, the
Three address fields, sequence control domain, the 4th address field, service quality control domain and High-speed Control domain, wherein, frame control domain continues
The length of time-domain, sequence control domain and service quality control domain is 2 bytes, the first address field, the second address field, third
The length of location domain and the 4th address field is 6 bytes, and the length in High-speed Control domain is 4 bytes.
However, under the application scenarios of 802.11ah, low-power consumption application can more effectively be supported using short mac frame head,
Short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, wherein, frame control domain, the first ground
The length in location domain and sequence control domain is 2 bytes, and the length of the second address field is 6 bytes, and AID is set to the first address field
It is interior.
It should be noted that according to subscriber policy, short mac frame head provided in an embodiment of the present invention can also including third
Location domain, the length of third address field is 6 bytes.
Short mac frame head eliminates duration field, service quality control domain, High-speed Control compared to traditional mac frame head
Domain and the 4th address field can not only reduce the length of mac frame head, improve the efficiency of transmission data, additionally it is possible to reduce the work(of STA
Consumption, has saved the energy.
You need to add is that AID is set in the first address field, since the length of the first address field is 2 bytes, i.e., 16 compare
It is special.According to the rules, the 1st bit of the first address field is set as the characteristic value of AID to the 13rd bit, because 802.11ah
Scene needs to support up to 6000 nodes, and AID when being great deal of nodes assigned characteristics value is divided by layer, that is, is divided into page,
Block, sub-block three-level, as shown in Figure 7.First address field is up to 4 page, occupies 2 bits；Below each page
Including 32 block, 5 bits are occupied；Below each block 3 bits are occupied including 8 sub-block again；Each sub-
It can include 8 STA below block, occupy 3 bits.Therefore, each AID need to only indicate some STA is which page belonged to,
Which position in block, sub-block and specific sub-block, it is possible to indicate that AID corresponds to the feature of the STA
Value.
Further, the 14th since least significant bit the bit of the first address field is flag, wherein, flag
It is used to indicate whether AID is multicast AID, the 15th since least significant bit the bit of the first address field and the 16th bit
It is set as numerical value 1.
After in the short media access control MAC frame head that AID is set to data packet, AP will be after MAC layer package
Data are sent to PHY layer and carry out package.
802.11ah standards support several bandwidth of 1MHz, 2MHz, 4MHz, 8MHz and 16MHz, and define three kinds of PPDU frames
Form.These three frame formats are respectively 1MHz frame formats, leading frame format short more than or equal to 2MHz and more than or equal to 2MHz long
Leading frame format, wherein, short leading frame format is only used for SU (single user, single user) communications, and long preambles frame format was both
It can be used for SU communications, can be used for MU (multiple user, multi-user) communications.
Leading frame format short more than or equal to 2MHz, as shown in figure 8, including STF (short training field, short training
Practice), for PPDU startings detection, automatic growth control, rough offset estimation, time synchronization；LTF1(long training
Field 1, long training domain 1), for channel estimation, accurate frequency bias estimation, time synchronization；LTF2(long training
Field 2, long training domain 2) and LTF1 is used for the channel estimation of more spatial flows together, accurate frequency bias is estimated, time synchronization,
LTF_NLTF (long training field NLTF, long training domain NLTF) and LTF1 is used for the channel of more spatial flows together
Estimation, accurate frequency bias estimation, time synchronization, wherein N_LTF refers to the specific number in LTF domains, related with the number of spatial stream；SIG
(signal, signal) is used for transmission receiving side and unpacks some key messages needed, such as bandwidth, the number of spatial stream, modulation methods
Formula etc..
More than or equal to 2MHz long preambles frame formats, as shown in figure 9, including STF, LTF1, SIGA (signal A, signal A),
Multiple users publicly-owned key message when being used for transmission the key message of receiving side XieSUBao needs or solution MU packets；D-STF
(short training field for data, the Short Training domain of data), for improving automatic growth control；SIGB
(signal B, signal B), if SU durations are identical with D-LTF1 values, can improve the performance of channel estimation；In MU, for passing
Each user's distinctive key message during defeated receiving side solution MU packets.
For multicast packet after MAC layer package when PHY layer carries out package, AP first calculates its corresponding group for STA
PAID (partial AID, part AID) is broadcast, wherein, the length that PAID is is 9 bits, is that AID is calculated after overcompression
's.Multiple AID can obtain identical PAID after compression calculates, and be detected for the packet address of phy layer.According to public affairs
Formula (1) can calculate multicast PAID, and formula (1) is as follows：
(dec(AID[0:8])+dec(BSSID[44:47]⊕BSSID[40:43])×25)mod 29Formula (1)
Wherein, ⊕ represents step-by-step xor operation；Mod X represent mould X operations；Dec () represents decimal system conversion operation；AID
[0:8] represent the 0th bit of AID to the 8th bit；BSSID[44:47] the 44th bit of BSSID is represented extremely
47th bit.
It calculates to be placed on after the PAID in PPDU frame formats, if multicast PAID meets preset condition, AP is set
Multicast PAID is in the physical layer convergence procedure protocol Data Unit PPDU frame formats of multicast packet.If multicast PAID is unsatisfactory for
Preset condition, AP are then not provided with multicast PAID in the PPDU frame formats of multicast packet.Wherein, preset condition refers to according to public affairs
The PAID that formula (1) calculates is not equal to the first preset value, and the PAID calculated is not equal to the second preset value, wherein, first is pre-
If value is the value calculated according to formula (2), the second preset value is the value calculated according to formula (3)：
(dec(BSSID[39:47])mod(29- 1))+1 formula (2)
(dec(Overlapping BSSID[39:47])mod(29- 1))+1 formula (3)
Wherein, over lapping BSSID refer to the identifier for the neighbor bss S for having overlapping with current BSS coverage areas,
The MAC Address of i.e. adjacent AP.
Correspondingly, it calculates to be placed on after the PAID in PPDU frame formats, if PAID is unsatisfactory for preset condition, no
PAID is set in PPDU frame formats.
You need to add is that if PPDU frame formats are short leading frame format, multicast PAID is set to short leading frame format
Signal domain SIG in (part in figure indicated by arrow)；If alternatively, PPDU frame formats be long preambles frame format, multicast
PAID is set in the signal A domain SIGA of long preambles frame format (part in figure indicated by arrow).
After data packet passes through MAC layer package and PHY layer package, when being sent as multicast packet, AP is distributed for STA
Corresponding multicast AID, wherein, multicast AID is set in the short media access control MAC frame head of multicast packet, multicast AID's
Flag is provided with first flag, and the value of first flag is 1.
S202, AP send broadcast singal to STA, so that STA knows that AP will send multicast packet to STA.
Before AP sends multicast packet at least two STA, AP, which can be sent, carries transmission transmission instruction mapping letter
The broadcast singal of breath is to STA, so that STA knows that AP will send multicast packet to STA.
Wherein, broadcast singal is DTIM (Delivery traffic indication map, the hair by beacon frames
Send transmission instruction mapping) broadcast singal transmission, wherein, beacon is a kind of management frame that AP is periodically broadcasted, and DTIM is
A domain in the broadcast singal for the beacon frames that AP is sent.
S203, AP send multicast packet at least two STA, so that at least two STA are according to multicast AID judgement groups
Whether unicast packets are multicast packet corresponding at least two STA.
Wherein, at least two STA are located in same multicast group.
AP sends multicast packet at least two STA, so that at least two STA judge multicast number according to multicast AID
Whether it is multicast packet corresponding at least two STA according to packet.
You need to add is that according to the difference of subscriber policy, the value of first flag is also different, and first flag can be number
Value 1, or 0 grade others numerical value, the present invention are not limited.
The transmission of multicast data packet method that the embodiment of the present invention is provided distributes corresponding multicast AID by AP for STA,
Wherein, multicast AID is set in the short mac frame head of multicast packet and AP sends multicast packet at least two STA,
So that at least two STA judge whether multicast packet is multicast packet corresponding at least two STA according to multicast AID
Packet, wherein, at least two STA are located in same multicast group.With this solution, since AP is the corresponding multicast of STA distribution
AID, and multicast packet is sent at least two STA, so that at least two STA judge multicast packet according to multicast AID
Whether be multicast packet corresponding at least two STA, therefore, it is specified that how with the mode of multicast AID by multicast packet
It is sent to STA.
The embodiment of the present invention provides a kind of data pack transmission method, and as shown in Figure 10, this method includes：
S301, STA receive the multicast packet that AP is sent.
STA receives the multicast packet that AP is sent, wherein, the multicast packet is sent to by the AP including described
At least two STA including STA, multicast AID is set to the short media access control MAC frame of multicast packet in multicast packet
In head, the flag of multicast AID is provided with first flag.
S302, STA judge whether multicast packet is multicast packet corresponding to STA according to multicast AID.
STA judges whether multicast packet is multicast packet corresponding to STA according to multicast AID, if multicast packet
To correspond to the multicast packet of the STA, then STA continues to the multicast packet；If multicast packet does not correspond to this
The multicast packet of STA, then STA abandon the multicast packet.
It should be noted that be provided with PAID in PPDU frame formats, STA can also be judged according to PAID data packet whether be
Corresponding to the data packet of STA, the present invention is not limited.
The transmission of multicast data packet method that the embodiment of the present invention is provided, STA receive the multicast packet that AP is sent,
In, multicast packet is sent at least two STA including STA by AP, and multicast AID is set to multicast in multicast packet
In the short media access control MAC frame head of data packet and STA according to multicast AID judge multicast packet whether be corresponding to
The multicast packet of STA.With this solution, since AP for STA distributes corresponding multicast AID, and at least two STA transmission groups
Unicast packets, so that at least two STA judge whether multicast packet is corresponding at least two STA according to multicast AID
Multicast packet, therefore, it is specified that how multicast packet to be sent to STA with the mode of multicast AID.
The embodiment of the present invention provides a kind of data pack transmission method, as shown in figure 11, including：
S401, STA receive the broadcast singal that AP is sent.
S402, STA know that AP will send multicast packet to STA.
S403, STA receive the multicast packet that AP is sent.
Wherein, the multicast packet is sent at least two STA including the STA, multicast number by the AP
It is set in the short media access control MAC frame head of multicast packet according to multicast AID in packet, the flag of multicast AID is provided with
First flag.
Short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is set to
In first address field.The length of first address field is 16 bits, wherein, the 14th since least significant bit of the first address field
A bit is flag, wherein, flag is used to indicate whether AID is multicast AID.
S404, STA judge whether multicast packet is multicast packet corresponding to STA according to multicast AID.
STA judges whether multicast packet is multicast packet corresponding to STA according to multicast AID, if multicast packet
To correspond to the multicast packet of the STA, then STA continues to the multicast packet；If multicast packet does not correspond to this
The multicast packet of STA, then STA abandon the multicast packet.
It should be noted that be provided with PAID in PPDU frame formats, STA can also be judged according to PAID data packet whether be
Corresponding to the data packet of STA, the present invention is not limited.
The transmission of multicast data packet method that the embodiment of the present invention is provided, STA receive the multicast packet that AP is sent,
In, multicast packet is sent at least two STA including STA by AP, and multicast AID is set to multicast in multicast packet
In the short media access control MAC frame head of data packet and STA according to multicast AID judge multicast packet whether be corresponding to
The multicast packet of STA.With this solution, since AP for STA distributes corresponding multicast AID, and at least two STA transmission groups
Unicast packets, so that at least two STA judge whether multicast packet is corresponding at least two STA according to multicast AID
Multicast packet, therefore, it is specified that how multicast packet to be sent to STA with the mode of multicast AID.
The embodiment of the present invention provides a kind of AP, as shown in figure 12, including:
Processing module 10, for distributing corresponding multicast AID for STA, wherein, multicast AID is set to multicast packet
In short media access control MAC frame head.
Sending module 11, for sending multicast packet at least two STA, so that at least two STA are according to multicast
AID judges whether multicast packet is multicast packet corresponding at least two STA, wherein, at least two STA are located at same
In a multicast group.
Further, the flag of multicast AID is provided with first flag.
Further, processing module 10 are additionally operable to calculate its corresponding multicast PAID and setting multicast PAID for STA
In the physical layer convergence procedure protocol Data Unit PPDU frame formats of multicast packet.
Further, if PPDU frame formats are short leading frame format, multicast PAID is set to the letter of short leading frame format
In number domain；Alternatively,
If PPDU frame formats are long preambles frame format, multicast PAID is set in the signal A domains of long preambles frame format.
Further, short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, multicast
AID is set in the first address field.
Further, the length of the first address field be 16 bits, wherein, the first address field since least significant bit
14th bit is flag, wherein, flag is used to indicate whether AID is multicast AID.
Further, sending module 11 are additionally operable to：
Broadcast singal is sent to STA, so that STA knows that AP will send multicast packet to STA.
The AP that the embodiment of the present invention is provided, including processing module, for distributing corresponding multicast AID for STA, wherein,
Multicast AID is set in the short media access control MAC frame head of multicast packet and sending module, for at least two
STA sends multicast packet, so that at least two STA judge whether multicast packet is corresponding at least according to multicast AID
The multicast packet of two STA, wherein, at least two STA are located in same multicast group.With this solution, since AP is STA
Corresponding multicast AID is distributed, and multicast packet is sent at least two STA, so that at least two STA are according to multicast AID
Judge whether multicast packet is multicast packet corresponding at least two STA, therefore, it is specified that how with multicast AID's
Multicast packet is sent to STA by mode.
The embodiment of the present invention provides a kind of STA, as shown in figure 13, including:
Receiving unit 20, for receiving the multicast packet of AP transmissions, wherein, the multicast packet is sent by the AP
To at least two STA including the STA, multicast AID is set to the short media of multicast packet and connects in multicast packet
Enter to control in mac frame head.
Judging unit 21, for judging whether multicast packet is multicast packet corresponding to STA according to multicast AID.
Further, the flag of multicast AID is provided with first flag.
Further, short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, multicast
AID is set in the first address field.
Further, the length of the first address field be 16 bits, wherein, the first address field since least significant bit
14th bit is flag, wherein, flag is used to indicate whether AID is multicast AID.
Further, as shown in figure 14, STA is further included：
Receiving unit 20 is additionally operable to receive the broadcast singal that AP is sent.
Acquiring unit 22, for knowing that AP will send multicast packet.
Further, judging unit 21, if being additionally operable to be provided with multicast PAID in multicast PPDU frame formats, according to multicast
PAID judges whether multicast packet is multicast packet corresponding to STA.
The STA that the embodiment of the present invention is provided, including receiving unit, for receiving the multicast packet of AP transmissions, wherein,
The multicast packet is sent at least two STA including the STA by the AP, multicast AID in multicast packet
It is set in the short media access control MAC frame head of multicast packet and judging unit, for according to multicast AID judgement groups
Whether unicast packets are multicast packet corresponding to STA.With this solution, since AP is the corresponding multicast AID of STA distribution,
And multicast packet is sent at least two STA, so that whether at least two STA judge multicast packet according to multicast AID
To correspond to the multicast packet of at least two STA, therefore, it is specified that how multicast packet to be sent with the mode of multicast AID
To STA.
The embodiment of the present invention provides a kind of access point AP, as shown in figure 15, including：
Processor 30, for distributing corresponding multicast AID for STA, wherein, multicast AID is set to the short of multicast packet
In media access control MAC frame head.
Transmission circuit 31, for sending multicast packet at least two STA, so that at least two STA are according to multicast
AID judges whether multicast packet is multicast packet corresponding at least two STA, wherein, at least two STA are located at same
In a multicast group.
Processor 30 can also be known as central processing unit (Central Processing Unit, CPU).Above-mentioned hair
The method that bright embodiment discloses can be applied in processor 30 that either each functional circuit or device are real with processor 30
It is existing.Processor 30 may be a kind of IC chip, have the processing capacity of signal.During realization, the above method
Each step can be completed by the integrated logic circuit of the hardware in processor 30 or the instruction of software form.Above-mentioned processing
Device 30 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), ready-made programmable gate array
(FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.Can realize or
Person controls disclosed each method, step and the logic diagram performed in the embodiment of the present invention.General processor can be microprocessor
Device or the processor can also be any conventional processors etc..The step of method with reference to disclosed in the embodiment of the present invention, can
Be embodied directly in hardware decoding processor perform completion or with the hardware in decoding processor and software module combination perform
It completes.Software module can be located at random access memory, flash memory, read-only memory, programmable read only memory or electrically-erasable
In the storage medium of this fields such as programmable storage, register maturation.
Further, the flag of multicast AID is provided with first flag.
Further, processor 30 is additionally operable to calculate its corresponding multicast PAID and setting multicast PAID in group for STA
In the physical layer convergence procedure protocol Data Unit PPDU frame formats of unicast packets.
Further, if PPDU frame formats are short leading frame format, multicast PAID is set to the letter of short leading frame format
In number domain；Alternatively,
If PPDU frame formats are long preambles frame format, multicast PAID is set in the signal A domains of long preambles frame format.
Further, short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, multicast
AID is set in the first address field.
Further, the length of the first address field be 16 bits, wherein, the first address field since least significant bit
14th bit is flag, wherein, flag is used to indicate whether AID is multicast AID.
Further, transmission circuit 31 are additionally operable to：
Broadcast singal is sent to STA, so that STA knows that AP will send multicast packet to STA.
The embodiment of the present invention also provides a kind of site STA, as shown in figure 16, including：
Receiver 40, for receiving the multicast packet of AP transmissions, wherein, the multicast packet is sent to by the AP
At least two STA including the STA, multicast AID is set to the short media access of multicast packet in multicast packet
It controls in mac frame head.
Processor 41, for judging whether multicast packet is multicast packet corresponding to STA according to multicast AID.
The method that the embodiments of the present invention disclose can be applied in processor 41 or each work(with processor 41
It can circuit or device realization.Processor 41 may be a kind of IC chip, have the processing capacity of signal.It was realizing
Cheng Zhong, each step of the above method can pass through the integrated logic circuit of the hardware in processor 41 or the instruction of software form
It completes.Above-mentioned processor 41 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), show
Into programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware
Component.It can realize or control disclosed each method, step and the logic diagram performed in the embodiment of the present invention.General procedure
Device can be microprocessor or the processor can also be any conventional processor etc..With reference to disclosed in the embodiment of the present invention
Method the step of can be embodied directly in hardware decoding processor and perform completion or with the hardware in decoding processor and soft
Part block combiner performs completion.Software module can be located at random access memory, and flash memory, read-only memory may be programmed read-only storage
In the storage medium of this fields such as device or electrically erasable programmable memory, register maturation.
Further, the flag of multicast AID is provided with first flag.
Further, short mac frame head includes frame control domain, the first address field, the second address field and sequence control domain, multicast
AID is set in the first address field.
Further, the length of the first address field be 16 bits, wherein, the first address field since least significant bit
14th bit is flag, wherein, flag is used to indicate whether AID is multicast AID.
Further, receiver 40 are additionally operable to receive the broadcast singal that AP is sent.
Processor 41 is additionally operable to know that AP will send multicast packet.
Further, processor 41, if being additionally operable to be provided with multicast PAID in multicast PPDU frame formats, according to multicast
PAID judges whether multicast packet is multicast packet corresponding to STA.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and aforementioned program can be stored in a computer read/write memory medium, the program
When being executed, step including the steps of the foregoing method embodiments is performed；And aforementioned storage medium includes：ROM, RAM, magnetic disc or light
The various media that can store program code such as disk.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (22)
- A kind of 1. transmission of multicast data packet method, which is characterized in that including：Access point AP distributes corresponding Multicast Association identifier AID for site STA；It, will multicast AID settings corresponding at least two STA when the AP sends multicast packet at least two STA In in the short media access control MAC frame head of the multicast packet, wherein, at least two STA is located at same multicast In group, flag is provided in short mac frame head, the flag of the multicast AID is provided with first flag, and the first flag is used In indicating that data packet to be sent is multicast packet；The AP sends the multicast packet at least two STA, so that at least two STA is according to the multicast AID judges whether the multicast packet is multicast packet corresponding at least two STA.
- 2. transmission of multicast data packet method according to claim 1, which is characterized in that further include：The AP calculates its corresponding multicast partial association identifier PAID for STA；The AP sets the multicast PAID in the physical layer convergence procedure protocol Data Unit PPDU frames of the multicast packet In form.
- 3. transmission of multicast data packet method according to claim 2, which is characterized in thatIf the PPDU frame formats are short leading frame format, the multicast PAID is set to the signal of the short leading frame format In domain；Alternatively,If the PPDU frame formats are long preambles frame format, the multicast PAID is set to the signal of the long preambles frame format In A domains.
- 4. transmission of multicast data packet method according to claim 1, which is characterized in that the short mac frame head includes frame control Domain processed, the first address field, the second address field and sequence control domain, the multicast AID are set in first address field.
- 5. transmission of multicast data packet method according to claim 4, which is characterized in that the length of first address field is 16 bits, wherein, the 14th since least significant bit the bit of first address field is flag, wherein, the mark Know position and be used to indicate whether AID is multicast AID.
- 6. transmission of multicast data packet method according to any one of claims 1-5, which is characterized in that in the AP to extremely Before few two STA send the multicast packet, the method further includes：The AP sends broadcast singal to the STA, so that the STA knows that the AP will send the multicast packet extremely The STA.
- A kind of 7. transmission of multicast data packet method, which is characterized in that including：STA receives the multicast packet that AP is sent, wherein, the multicast packet is sent to by the AP to exist including the STA At least two interior STA, multicast AID corresponding at least two STA is set to the multicast in the multicast packet In the short media access control MAC frame head of data packet, flag is provided in short mac frame head, the flag of the multicast AID is set First flag is equipped with, the first flag is used to indicate data packet to be sent as multicast packet；The STA judges whether the multicast packet is multicast packet corresponding to the STA according to the multicast AID.
- 8. transmission of multicast data packet method according to claim 7, which is characterized in that the short mac frame head includes frame control Domain processed, the first address field, the second address field and sequence control domain, the multicast AID are set in first address field.
- 9. transmission of multicast data packet method according to claim 8, which is characterized in that the length of first address field is 16 bits, wherein, the 14th since least significant bit the bit of first address field is flag, wherein, the mark Know position and be used to indicate whether AID is multicast AID.
- 10. the transmission of multicast data packet method according to any one of claim 7-9, which is characterized in that it is described at least Before two STA receive the multicast packet that AP is sent, the method further includes：The STA receives the broadcast singal that the AP is sent；The STA knows that the AP will send the multicast packet to the STA.
- 11. transmission of multicast data packet method according to claim 7, which is characterized in that further include：If being provided with the multicast PAID in the multicast PPDU frame formats, the STA judges institute according to the multicast PAID State whether multicast packet is multicast packet corresponding to the STA.
- 12. a kind of AP, which is characterized in that including：Processing module, for distributing corresponding Multicast Association identifier AID for STA；It, will multicast AID settings corresponding at least two STA when the AP sends multicast packet at least two STA In in the short media access control MAC frame head of the multicast packet, wherein, at least two STA is located at same multicast In group, flag is provided in short mac frame head, the flag of the multicast AID is provided with first flag, and the first flag is used In indicating that data packet to be sent is multicast packet；Sending module, for sending the multicast packet at least two STA, so that at least two STA is according to institute It states multicast AID and judges whether the multicast packet is multicast packet corresponding at least two STA.
- 13. AP according to claim 12, which is characterized in thatThe processing module is additionally operable to calculate its corresponding multicast PAID and the setting multicast PAID at described group for STA In the physical layer convergence procedure protocol Data Unit PPDU frame formats of unicast packets.
- 14. AP according to claim 13, which is characterized in thatIf the PPDU frame formats are short leading frame format, the multicast PAID is set to the signal of the short leading frame format In domain；Alternatively,If the PPDU frame formats are long preambles frame format, the multicast PAID is set to the signal of the long preambles frame format In A domains.
- 15. AP according to claim 12, which is characterized in that the short mac frame head includes frame control domain, the first address Domain, the second address field and sequence control domain, the multicast AID are set in first address field.
- 16. AP according to claim 15, which is characterized in that the length of first address field is 16 bits, wherein, institute The 14th since least significant bit the bit for stating the first address field is flag, wherein, the flag is used to indicate AID Whether it is multicast AID.
- 17. according to the AP described in any one of claim 12-16, which is characterized in that the sending module is additionally operable to：Broadcast singal is sent to the STA, so that the STA knows that the AP will send the multicast packet to described STA。
- 18. a kind of STA, which is characterized in that including：Receiving unit, for receive AP transmission multicast packet, wherein, the multicast packet by the AP be sent to including At least two STA including the STA, multicast AID corresponding at least two STA is set in the multicast packet In the short media access control MAC frame head of the multicast packet, flag is provided in short mac frame head, the multicast AID's Flag is provided with first flag, and the first flag is used to indicate data packet to be sent as multicast packet；Judging unit, for judging whether the multicast packet is multicast number corresponding to the STA according to the multicast AID According to packet.
- 19. STA according to claim 18, which is characterized in that the short mac frame head includes frame control domain, the first address Domain, the second address field and sequence control domain, the multicast AID are set in first address field.
- 20. STA according to claim 19, which is characterized in that the length of first address field is 16 bits, wherein, The 14th since least significant bit the bit of first address field is flag, wherein, the flag is used to indicate Whether AID is multicast AID.
- 21. according to the STA described in any one of claim 18-20, which is characterized in that further include：The receiving unit is additionally operable to receive the broadcast singal that the AP is sent；Acquiring unit, for knowing that the AP will send the multicast packet.
- 22. STA according to claim 18, which is characterized in that the judging unit is additionally operable to：If being provided with the multicast PAID in the multicast PPDU frame formats, the multicast number is judged according to the multicast PAID Whether it is multicast packet corresponding to the STA according to packet.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310071466.6A CN104038902B (en) | 2013-03-06 | 2013-03-06 | A kind of transmission of multicast data packet method and device |
| PCT/CN2013/088786 WO2014134942A1 (en) | 2013-03-06 | 2013-12-06 | Method and device for transmitting multicast data packet |
| US14/462,816 US9774464B2 (en) | 2013-03-06 | 2014-08-19 | Multicast packet transmission method, and apparatus |
| US15/690,927 US20170366364A1 (en) | 2013-03-06 | 2017-08-30 | Multicast Packet Transmission Method, and Apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310071466.6A CN104038902B (en) | 2013-03-06 | 2013-03-06 | A kind of transmission of multicast data packet method and device |
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| CN201310144338.XA Division CN104038903A (en) | 2013-03-06 | 2013-03-06 | Multicast data packet transmission method and apparatus |
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| CN104038902B true CN104038902B (en) | 2018-06-15 |
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| CN106559904B (en) * | 2015-09-30 | 2021-08-03 | 中兴通讯股份有限公司 | Access method and device of wireless network |
| CN107787049B (en) * | 2016-08-29 | 2020-04-03 | 华为技术有限公司 | Method, access point and station for transmitting service data |
| CN114765742B (en) * | 2021-01-12 | 2023-03-24 | 华为技术有限公司 | Multicast communication method, device and related equipment |
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| US8848680B2 (en) * | 2009-12-03 | 2014-09-30 | Lg Electronics Inc. | Method and apparatus for transmitting a frame in a wireless RAN system |
| US8411632B2 (en) * | 2010-11-04 | 2013-04-02 | Nokia Corporation | Transmission protection scheme |
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