CN104038903A - Multicast data packet transmission method and apparatus - Google Patents
Multicast data packet transmission method and apparatus Download PDFInfo
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Abstract
The embodiments of the invention provide a method for PHY packaging of physical layer of a multicast data packet. The method comprises: an access point (AP) calculating multicast partial association identifiers (PAIDs) of a station (STA) for the STA, wherein the AP, after compressing multiple association identifiers (AIDs), calculates to obtain the same broadcast PAID; and the AP arranging that the multicast PAID is in a frame format of a physical convergence process protocol data unit (PPDU) of the multicast data packet.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of transmission of multicast data packet method and device.
Background technology
WLAN (Wireless Local Area Networks, WLAN) is the LAN (Local Area Network) using wireless channel as transmission medium, is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, conventionally can support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for the application of a large amount of low-power consumption sensor types, for example, checks meter, environmental monitoring, Smart Home etc.Exemplary, these STA can be separately positioned on water meter, ammeter, gas meter, and these water meters, ammeter, gas meter can be under the jurisdiction of different or identical company, and these companies can pass through wireless aps (access point, access point), send information to these water meters, ammeter, gas meter respectively with the identical or different cycles, or these water meters, ammeter, gas meter are upgraded.Therefore,, under the application scenarios of 802.11ah, AP can send the multicast information of different cycles, different content to different STA.But at present in the standard of 802.11ah, how regulation does not send to STA by the mode of multicast AID by multicast packet.
Summary of the invention
Embodiments of the invention provide a kind of transmission of multicast data packet method and device, have specified how by the mode of multicast AID, multicast packet to be sent to STA.
Embodiments of the invention adopt following technical scheme:
First aspect, the embodiment of the present invention provides a kind of transmission of multicast data packet method, and the method comprises:
Access point AP is that site STA is distributed corresponding multicast associated identifiers AID, and wherein, described multicast AID is arranged in the short media access control MAC frame head of described multicast packet, and the flag of described multicast AID is provided with the first mark;
Described AP sends described multicast packet at least two STA, judge that according to described multicast AID whether described multicast packet is as the multicast packet corresponding to described at least two STA taking at least two STA described in making, wherein, described at least two STA are positioned at same multicast group.
In the possible implementation of the first, according to first aspect, described method also comprises:
Described AP is that STA calculates its corresponding multicast partial association identifier PAID;
Described AP arranges described multicast PAID in the physical layer convergence procedure protocol Data Unit PPDU of described multicast packet frame format.
In the possible implementation of the second, in conjunction with first aspect or the possible implementation of the first, if described PPDU frame format is short previous video frames form, described multicast PAID is arranged in the signal domain of described short previous video frames form; Or,
If described PPDU frame format is long preambles frame format, described multicast PAID is arranged in the signal A territory of described long preambles frame format.
In the third possible implementation, in conjunction with first aspect or possible implementation or the possible implementation of the second of the first, described short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and described multicast AID is arranged in described the first address field.
In the 4th kind of possible implementation, in conjunction with first aspect or the possible implementation of the first to the third possible implementation, the length of described the first address field is 16 bits, wherein, the 14th bit starting from least significant bit of described the first address field is described flag, wherein, whether be multicast AID to described flag if being used to indicate AID.
In the 5th kind of possible implementation, in conjunction with first aspect or the possible four kinds of possible implementations of implementation to the of the first, before described AP sends described multicast packet at least two STA, described method also comprises:
Described AP sends broadcast singal to described STA, to make described STA know that described AP will send described multicast packet to described STA.
Second aspect, the embodiment of the present invention provides a kind of transmission of multicast data packet method, and the method comprises:
STA receives the multicast packet that AP sends, wherein, described multicast packet is sent at least two STA including described STA by described AP, in described multicast packet, multicast AID is arranged in the short media access control MAC frame head of described multicast packet, and the flag of described multicast AID is provided with the first mark;
Described STA judges according to described multicast AID whether described multicast packet is the multicast packet corresponding to described STA.
In the possible implementation of the first, according to second aspect, described short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and described multicast AID is arranged in described the first address field.
In the possible implementation of the second, in conjunction with second aspect or the possible implementation of the first, the length of described the first address field is 16 bits, wherein, the 14th bit starting from least significant bit of described the first address field is described flag, wherein, whether be multicast AID to described flag if being used to indicate AID.
In the third possible implementation, in conjunction with second aspect or possible implementation or the possible implementation of the second of the first, before described at least two STA receive the multicast packet of AP transmission, described method also comprises:
Described STA receives the broadcast singal that described AP sends;
Described STA knows that described AP will send described multicast packet to described STA.
In the 4th kind of possible implementation, in conjunction with second aspect or the possible implementation of the first, to the third possible implementation, described method also comprises:
If be provided with described multicast PAID in described multicast PPDU frame format, described STA judges according to described multicast PAID whether described multicast packet is the multicast packet corresponding to described STA.
The third aspect, the embodiment of the present invention provides a kind of AP, comprising:
Processing module, is used to STA to distribute corresponding multicast AID, and wherein, described multicast AID is arranged in the short media access control MAC frame head of described multicast packet, and the flag of described multicast AID is provided with the first mark;
Sending module, for sending described multicast packet at least two STA, judge that according to described multicast AID whether described multicast packet is as the multicast packet corresponding to described at least two STA taking at least two STA described in making, wherein, described at least two STA are positioned at same multicast group.
In the possible implementation of the first, according to the third aspect, described processing module, is also used to STA to calculate its corresponding multicast PAID, and described multicast PAID is set in the physical layer convergence procedure protocol Data Unit PPDU of described multicast packet frame format.
In the possible implementation of the second, in conjunction with the third aspect or the possible implementation of the first, if described PPDU frame format is short previous video frames form, described multicast PAID is arranged in the signal domain of described short previous video frames form; Or,
If described PPDU frame format is long preambles frame format, described multicast PAID is arranged in the signal A territory of described long preambles frame format.
In the third possible implementation, in conjunction with the third aspect or possible implementation or the possible implementation of the second of the first, described short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and described multicast AID is arranged in described the first address field.
In the 4th kind of possible implementation, in conjunction with the third aspect or the possible implementation of the first to the third possible implementation, the length of described the first address field is 16 bits, wherein, the 14th bit starting from least significant bit of described the first address field is described flag, wherein, whether be multicast AID to described flag if being used to indicate AID.
In the 5th kind of possible implementation, in conjunction with the third aspect or the possible four kinds of possible implementations of implementation to the of the first, described sending module, also for:
Send broadcast singal to described STA, to make described STA know that described AP will send described multicast packet to described STA.
Fourth aspect, the embodiment of the present invention provides a kind of STA, comprising:
Receiving element, the multicast packet sending for receiving AP, wherein, described multicast packet is sent at least two STA including described STA by described AP, in described multicast packet, multicast AID is arranged in the short media access control MAC frame head of described multicast packet, and the flag of described multicast AID is provided with the first mark;
Judging unit, for judging according to described multicast AID whether described multicast packet is the multicast packet corresponding to described STA.
In the possible implementation of the first, in conjunction with fourth aspect, described short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and described multicast AID is arranged in described the first address field.
In the possible implementation of the second, in conjunction with fourth aspect or the possible implementation of the first, the length of described the first address field is 16 bits, wherein, the 14th bit starting from least significant bit of described the first address field is described flag, wherein, whether be multicast AID to described flag if being used to indicate AID.
In the third possible implementation, in conjunction with fourth aspect or possible implementation or the possible implementation of the second of the first, described STA also comprises:
Described receiving element, the broadcast singal also sending for receiving described AP;
Acquiring unit, for knowing that described AP will send described multicast packet.
In the 4th kind of possible implementation, in conjunction with second aspect or the possible implementation of the first to the third possible implementation, described judging unit, also for:
If be provided with described multicast PAID in described multicast PPDU frame format, judge according to described multicast PAID whether described multicast packet is the multicast packet corresponding to described STA.
Another aspect, the embodiment of the present invention provides a kind of method of physical layer PHY package of multicast packet, comprising:
Access point AP is the multicast partial association identifier PAID that site STA is calculated described STA, and wherein said AP compresses rear calculating to multiple associated identifiers AID and obtains an identical described multicast PAID;
Described AP arranges described multicast PAID in the physical layer convergence procedure protocol Data Unit PPDU of described multicast packet frame format.
On the one hand, the embodiment of the present invention gives a kind of multicast PPDU frame transmission method and comprises again:
STA receives the data cell PPDU of the physical layer convergence procedure association frame of the multicast packet of AP transmission, and wherein, described multicast PPDU frame is sent at least two STA including described STA by described AP, and described multicast PAID is arranged in multicast PPDU frame;
The multicast AID that described STA distributes according to AP calculates described multicast PAID, and multicast PAID in more described multicast PPDU frame with described in the multicast PAID that calculates, judge whether described multicast PPDU frame is the multicast PPDU frame of corresponding described STA.
Transmission of multicast data packet method and device that the embodiment of the present invention provides, be that STA distributes corresponding multicast AID by AP, wherein, multicast AID is arranged in the short mac frame head of multicast packet, the flag of multicast AID is provided with the first mark, and AP is at least two STA transmission multicast packets, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart one of the data pack transmission method that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the structural representation of traditional mac frame head;
The structural representation one of the short mac frame head that Fig. 3 provides for the embodiment of the present invention;
The structural representation two of the short mac frame head that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the AID that Fig. 5 provides for the embodiment of the present invention;
The flowchart 2 of the data pack transmission method that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the characteristic value of the AID that Fig. 7 provides for the embodiment of the present invention;
The structural representation one of the PDDU frame format that Fig. 8 provides for the embodiment of the present invention;
The structural representation two of the PDDU frame format that Fig. 9 provides for the embodiment of the present invention;
The flow chart 3 of the data pack transmission method that Figure 10 provides for the embodiment of the present invention;
The flow chart four of the data pack transmission method that Figure 11 provides for the embodiment of the present invention;
The structural representation of the AP that Figure 12 provides for one embodiment of the invention;
The structural representation one of the STA that Figure 13 provides for one embodiment of the invention;
The structural representation two of the STA that Figure 14 provides for one embodiment of the invention;
The structural representation of the access point AP that Figure 15 provides for another embodiment of the present invention;
The structural representation of the site STA that Figure 16 provides for another embodiment of the present invention.
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, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of transmission of multicast data packet method, and as shown in Figure 1, the method comprises:
S101, AP are that STA distributes corresponding multicast AID.
Wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
WLAN (Wireless Local Area Networks, WLAN) is the LAN (Local Area Network) using wireless channel as transmission medium, is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, conventionally can support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for the application of a large amount of low-power consumption sensor types, for example, checks meter, environmental monitoring, Smart Home etc.
Under the application scenarios of 802.11ah, in the time that AP will send multicast packet to multiple STA, first AP will process to sent data.First data carry out package at MAC layer, now, AID are arranged in the short mac frame head of packet; Subsequently, the data after MAC layer package are sent to PHY layer and carry out package, wherein, the detailed process of package will be described in the following embodiments, repeat no more herein.
It should be noted that, the form of traditional mac frame head, as shown in Figure 2, traditional mac frame head comprises frame control domain, duration field or identification field, the first address field, the second address field, the 3rd address field, sequence control domain, four-address territory, service quality control domain and High-speed Control territory, wherein, the length in frame control domain, duration field, sequence control domain and service quality control territory is 2 bytes, the length in the first address field, the second address field, the 3rd address field and four-address territory is 6 bytes, and the length in High-speed Control territory is 4 bytes.
But, under the application scenarios of 802.11ah, adopt short mac frame head more effective support low-power consumption to apply, as shown in Figure 3, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, wherein, the length of frame control domain, the first address field and sequence control domain is 2 bytes, the length of the second address field is 6 bytes, and AID is arranged in the first address field, BSSID (basic service set identifier, BSSID) is arranged in the second address field.
It should be noted that, according to subscriber policy, the short mac frame head that the embodiment of the present invention provides can also comprise the 3rd address field, and as shown in Figure 4, the length of the 3rd address field is 6 bytes.
Short mac frame head is than traditional mac frame head, save duration field, service quality control domain, High-speed Control territory and four-address territory, can not only reduce the length of mac frame head, improved the efficiency of transmission data, can also reduce the power consumption of STA, save the energy.
You need to add is that, AID is arranged at the form in the first address field, as shown in Figure 5, because the length of the first address field is 2 bytes, i.e. 16 bits.According to the rules, 13 bits of the 1st bit to that start from least significant bit of the first address field are set to the characteristic value of AID, the 14th bit starting from least significant bit of the first address field is flag, wherein, whether flag is used to indicate AID is multicast AID, and the 15th bit and the 16th bit that start from least significant bit of the first address field are set to numerical value 1.
In the time that packet will send as multicast packet, AP is that STA distributes corresponding multicast AID, and wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with the first mark, and the value of the first mark is 1.
S102, AP send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA.
Wherein, at least two STA are positioned at same multicast group.
AP sends multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA.
It should be noted that, the AID that the embodiment of the present invention provides writes according to binary system, and it is multicast packets that the first mark is used to indicate packet, and therefore, first is designated numerical value 1.When flag bit is not provided with the first mark, illustrate that this packet is not multicast packet, this packet can not send to STA by multicast.
You need to add is that, according to the difference of subscriber policy, the value of the first mark is also different, and the first mark can be numerical value 1, can be also other numerical value of 0 grade, and the present invention does not limit.
The transmission of multicast data packet method that the embodiment of the present invention provides, be that STA distributes corresponding multicast AID by AP, wherein, multicast AID is arranged in the short mac frame head of multicast packet, the flag of multicast AID is provided with the first mark, and AP is at least two STA transmission multicast packets, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of transmission of multicast data packet method, and as shown in Figure 6, the method comprises:
S201, AP are that STA distributes corresponding multicast AID.
Wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
WLAN (Wireless Local Area Networks, WLAN) is the LAN (Local Area Network) using wireless channel as transmission medium, is important supplement and the extension of wired networking mode.Under the application scenarios of 802.11ah, conventionally can support 6000 STA (station, website), wherein, 802.11ah is a kind of wireless LAN communication standard, for the application of a large amount of low-power consumption sensor types, for example, checks meter, environmental monitoring, Smart Home etc.
Under the application scenarios of 802.11ah, in the time that AP will send multicast packet to multiple STA, first AP will process to sent data.First data carry out package at MAC layer, now, AID are arranged in the short mac frame head of packet; Subsequently, the data after MAC layer package are sent to PHY layer and carry out package.
Below, will successively data be described at MAC layer package with in the process of PHY layer package.
Traditional mac frame head comprises frame control domain, duration field or identification field, the first address field, the second address field, the 3rd address field, sequence control domain, four-address territory, service quality control domain and High-speed Control territory, wherein, the length in frame control domain, duration field, sequence control domain and service quality control territory is 2 bytes, the length in the first address field, the second address field, the 3rd address field and four-address territory is 6 bytes, and the length in High-speed Control territory is 4 bytes.
But, under the application scenarios of 802.11ah, adopt short mac frame head more effective support low-power consumption to apply, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, wherein, the length of frame control 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 arranged in the first address field.
It should be noted that, according to subscriber policy, the short mac frame head that the embodiment of the present invention provides can also comprise the 3rd address field, and the length of the 3rd address field is 6 bytes.
Short mac frame head is than traditional mac frame head, save duration field, service quality control domain, High-speed Control territory and four-address territory, can not only reduce the length of mac frame head, improved the efficiency of transmission data, can also reduce the power consumption of STA, save the energy.
You need to add is that, AID is arranged in the first address field, because the length of the first address field is 2 bytes, i.e. and 16 bits.According to the rules, 13 bits of the 1st bit to the of the first address field are set to the characteristic value of AID, because the scene of 802.11ah need to be supported nearly 6000 nodes, when being great deal of nodes assigned characteristics value, divides by layer AID, be divided into page, block, tri-grades of sub-block, as shown in Figure 7.The first address field has at most 4 page, takies 2 bits; Below each page, comprise 32 block, take 5 bits; Below each block, comprise again 8 sub-block, take 3 bits; Below each sub-block, can comprise 8 STA, take 3 bits.Therefore, each AID only need indicate certain STA to belong to which page, block, and which position in sub-block and concrete sub-block, just can indicate AID to characteristic value that should STA.
Further, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID, and the 15th bit and the 16th bit that start from least significant bit of the first address field are set to numerical value 1.
After in the short media access control MAC frame head that AID is arranged to packet, AP sends to PHY layer by the data after MAC layer package and carries out package.
802.11ah standard is supported 1MHz, 2MHz, 4MHz, 8MHz and several bandwidth of 16MHz, and has defined three kinds of PPDU frame formats.These three kinds of frame formats are respectively 1MHz frame format, are more than or equal to the short previous video frames form of 2MHz, and be more than or equal to 2MHz long preambles frame format, wherein, short previous video frames form can only be used for SU (single user, alone family) communication, long preambles frame format both can be communicated by letter for SU, also can communicate by letter for MU (multiple user, multi-user).
Be more than or equal to the short previous video frames form of 2MHz, as shown in Figure 8, comprise STF (short training field, Short Training), for the initial detection of PPDU, automatic gain control, rough frequency deviation estimation, time synchronized; LTF1 (long training field1, long training domain 1), for channel estimating, accurate frequency bias estimation, time synchronized; LTF2 (long training field 2, long training domain 2), estimate with channel estimating, accurate frequency bias that LTF1 mono-is used from many spatial flows, time synchronized, LTF_NLTF (long training field NLTF, long training domain NLTF), estimate with channel estimating, accurate frequency bias that LTF1 mono-is used from many spatial flows, time synchronized, wherein N_LTF refers to the concrete number in LTF territory, relevant with spatial flow number; SIG (signal, signal), unpacks some key messages that need, such as bandwidth, spatial flow number, modulation system etc. for transmitting receiver side.
Be more than or equal to 2MHz long preambles frame format, as shown in Figure 9, comprise STF, LTF1, SIGA (signal A, signal A), the key message needing for transmitting receiver side XieSUBao, or separate the publicly-owned key message of multiple users of MU when bag; D-STF (short training field for data, the Short Training territory of data), for improvement of automatic gain control; SIGB (signal B, signal B), if SU duration is identical with D-LTF1 value, can improve the performance of channel estimating; In the time of MU, the distinctive key message of each user while bag for transmitting receiver side solution MU.
Multicast packet after MAC layer package is in the time that PHY layer carries out package, and first AP is that STA calculates its corresponding multicast PAID (partial AID, part AID), and wherein, the length that PAID is is 6 bits, is that AID calculates after overcompression.Multiple AID can obtain identical PAID after compression is calculated, and detect for the packet address of receiver side PHY layer.Can calculate multicast PAID according to formula (1), formula (1) is as follows:
Wherein,
represent step-by-step xor operation; Mod X represents mould X computing; Dec () represents decimal system conversion operations; AID[0:8] represent 8 bits of the 0th bit to the of AID; BSSID[44:47] represent 47 bits of the 44th bit to the of BSSID.
After calculating the PAID in PPDU frame format to be arranged at, pre-conditioned if multicast PAID meets, AP arranges multicast PAID in the physical layer convergence procedure protocol Data Unit PPDU of multicast packet frame format.If it is pre-conditioned that multicast PAID does not meet, AP does not arrange multicast PAID in the PPDU of multicast packet frame format.Wherein, pre-conditionedly refer to that the PAID calculating according to formula (1) is not equal to the first preset value, and the PAID calculating is not equal to the second preset value, wherein, the first preset value is the value calculating according to formula (2), and the second preset value is the value calculating according to formula (3):
(dec (BSSID[39:47]) mod (2
9-1))+1 formula (2)
(dec (Overlapping BSSID[39:47]) mod (2
9-1))+1 formula (3)
Wherein, overlapping BSSID refers to the identifier that has the neighbor bss S of overlapping with current BSS coverage, the i.e. MAC Address of adjacent AP.
Accordingly, after calculating the PAID in PPDU frame format to be arranged at, pre-conditioned if PAID does not meet, PAID is not arranged in PPDU frame format.
You need to add is that, if PPDU frame format is short previous video frames form, multicast PAID is arranged at the signal domain SIG interior (the indicated part of arrow in figure) of short previous video frames form; Or if PPDU frame format is long preambles frame format, multicast PAID is arranged at the signal A territory SIGA interior (the indicated part of arrow in figure) of long preambles frame format.
After packet is through MAC layer package and PHY layer package, while transmission as multicast packet, AP is that STA distributes corresponding multicast AID, wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with the first mark, and the value of the first mark is 1.
S202, AP send broadcast singal to STA, to make STA know that AP will send multicast packet to STA.
Before AP sends multicast packet at least two STA, AP can send and carry the broadcast singal that sends transmission instruction map information to STA, to make STA know that AP will send multicast packet to STA.
Wherein, broadcast singal is by the DTIM of beacon frame (Delivery traffic indication map, send transmission instruction mapping) broadcast singal transmission, wherein, beacon is periodically a kind of management frames of broadcast of AP, and DTIM is a territory in the broadcast singal of the beacon frame that sends of AP.
S203, AP send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA.
Wherein, at least two STA are positioned at same multicast group.
AP sends multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA.
You need to add is that, according to the difference of subscriber policy, the value of the first mark is also different, and the first mark can be numerical value 1, can be also other numerical value of 0 grade, and the present invention does not limit.
The transmission of multicast data packet method that the embodiment of the present invention provides, be that STA distributes corresponding multicast AID by AP, wherein, multicast AID is arranged in the short mac frame head of multicast packet, the flag of multicast AID is provided with the first mark, and AP is at least two STA transmission multicast packets, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of data pack transmission method, and as shown in figure 10, the method comprises:
S301, STA receive the multicast packet that AP sends.
STA receives the multicast packet that AP sends, wherein, described multicast packet is sent at least two STA including described STA by described AP, in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
S302, STA judge according to multicast AID whether multicast packet is the multicast packet corresponding to STA.
STA judges according to multicast AID whether multicast packet is the multicast packet corresponding to STA, if multicast packet is the multicast packet corresponding to this STA, STA continues to receive this multicast packet; If multicast packet is not the multicast packet corresponding to this STA, STA abandons this multicast packet.
It should be noted that, in PPDU frame format, be provided with PAID, STA also can judge whether packet is the packet corresponding to STA, and the present invention does not limit according to PAID.
The transmission of multicast data packet method that the embodiment of the present invention provides, STA receives the multicast packet that AP sends, wherein, multicast packet is sent at least two STA including STA by AP, in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with the first mark, and STA judges according to multicast AID whether multicast packet is the multicast packet corresponding to STA.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of data pack transmission method, as shown in figure 11, comprising:
S401, STA receive the broadcast singal that AP sends.
S402, STA know that AP will send multicast packet to STA.
S403, STA receive the multicast packet that AP sends.
Wherein, described multicast packet is sent at least two STA including described STA by described AP, and in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
Short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is arranged in the first address field.The length of the first address field is 16 bits, and wherein, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID.
S404, STA judge according to multicast AID whether multicast packet is the multicast packet corresponding to STA.
STA judges according to multicast AID whether multicast packet is the multicast packet corresponding to STA, if multicast packet is the multicast packet corresponding to this STA, STA continues to receive this multicast packet; If multicast packet is not the multicast packet corresponding to this STA, STA abandons this multicast packet.
It should be noted that, in PPDU frame format, be provided with PAID, STA also can judge whether packet is the packet corresponding to STA, and the present invention does not limit according to PAID.
The transmission of multicast data packet method that the embodiment of the present invention provides, STA receives the multicast packet that AP sends, wherein, multicast packet is sent at least two STA including STA by AP, in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with the first mark, and STA judges according to multicast AID whether multicast packet is the multicast packet corresponding to STA.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of AP, as shown in figure 12, comprising:
Processing module 10, is used to STA to distribute corresponding multicast AID, and wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
Sending module 11, for sending multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.
Further, processing module 10, is also used to STA to calculate its corresponding multicast PAID, and multicast PAID is set in the physical layer convergence procedure protocol Data Unit PPDU of multicast packet frame format.
Further, if PPDU frame format is short previous video frames form, multicast PAID is arranged in the signal domain of short previous video frames form; Or,
If PPDU frame format is long preambles frame format, multicast PAID is arranged in the signal A territory of long preambles frame format.
Further, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is arranged in the first address field.
Further, the length of the first address field is 16 bits, and wherein, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID.
Further, sending module 11, also for:
Send broadcast singal to STA, to make STA know that AP will send multicast packet to STA.
The AP that the embodiment of the present invention provides, comprise processing module, be used to STA to distribute corresponding multicast AID, wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, the flag of multicast AID is provided with the first mark, and sending module, for sending multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of STA, as shown in figure 13, comprising:
Receiving element 20, the multicast packet sending for receiving AP, wherein, described multicast packet is sent at least two STA including described STA by described AP, in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
Judging unit 21, for judging according to multicast AID whether multicast packet is the multicast packet corresponding to STA.
Further, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is arranged in the first address field.
Further, the length of the first address field is 16 bits, and wherein, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID.
Further, as shown in figure 14, STA also comprises:
Receiving element 20, the broadcast singal also sending for receiving AP.
Acquiring unit 22, for knowing that AP will send multicast packet.
Further, judging unit 21, if also for being provided with multicast PAID in multicast PPDU frame format, judges according to multicast PAID whether multicast packet is the multicast packet corresponding to STA.
The STA that the embodiment of the present invention provides, comprise receiving element, the multicast packet sending for receiving AP, wherein, described multicast packet is sent at least two STA including described STA by described AP, and in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark, and judging unit, for judging according to multicast AID whether multicast packet is the multicast packet corresponding to STA.By this scheme, because AP is that STA distributes corresponding multicast AID, and send multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, therefore, specified how by the mode of multicast AID, multicast packet to be sent to STA.
The embodiment of the present invention provides a kind of access point AP, as shown in figure 15, comprising:
Processor 30, is used to STA to distribute corresponding multicast AID, and wherein, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
Transtation mission circuit 31, for sending multicast packet at least two STA, to make at least two STA judge that according to multicast AID whether multicast packet is as the multicast packet corresponding at least two STA, wherein, at least two STA are positioned at same multicast group.
Processor 30 can also be called CPU (Central Processing Unit, CPU).The method that the invention described above embodiment discloses can be applied in processor 30, or coordinates each functional circuit or device to realize by processor 30.Processor 30 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the instruction of the integrated logic circuit of the hardware in processor 30 or software form.Above-mentioned processor 30 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or control disclosed each method, step and the logic diagram carried out in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Can directly be presented as that in conjunction with the step of the disclosed method of the embodiment of the present invention hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.
Further, processor 30 is also used to STA to calculate its corresponding multicast PAID, and multicast PAID is set in the physical layer convergence procedure protocol Data Unit PPDU of multicast packet frame format.
Further, if PPDU frame format is short previous video frames form, multicast PAID is arranged in the signal domain of short previous video frames form; Or,
If PPDU frame format is long preambles frame format, multicast PAID is arranged in the signal A territory of long preambles frame format.
Further, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is arranged in the first address field.
Further, the length of the first address field is 16 bits, and wherein, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID.
Further, transtation mission circuit 31, also for:
Send broadcast singal to STA, to make STA know 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, comprising:
Receiver 40, the multicast packet sending for receiving AP, wherein, described multicast packet is sent at least two STA including described STA by described AP, in multicast packet, multicast AID is arranged in the short media access control MAC frame head of multicast packet, and the flag of multicast AID is provided with the first mark.
Processor 41, for judging according to multicast AID whether multicast packet is the multicast packet corresponding to STA.
The method that the invention described above embodiment discloses can be applied in processor 41, or coordinates each functional circuit or device to realize by processor 41.Processor 41 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the instruction of the integrated logic circuit of the hardware in processor 41 or software form.Above-mentioned processor 41 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or control disclosed each method, step and the logic diagram carried out in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Can directly be presented as that in conjunction with the step of the disclosed method of the embodiment of the present invention hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.
Further, short mac frame head comprises frame control domain, the first address field, the second address field and sequence control domain, and multicast AID is arranged in the first address field.
Further, the length of the first address field is 16 bits, and wherein, the 14th bit starting from least significant bit of the first address field is flag, and wherein, whether flag is used to indicate AID is multicast AID.
Further, receiver 40, the broadcast singal also sending for receiving AP.
Processor 41, also for knowing that AP will send multicast packet.
Further, processor 41, if also for being provided with multicast PAID in multicast PPDU frame format, judges according to multicast PAID whether multicast packet is the multicast packet corresponding to STA.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Claims (5)
1. a method for the physical layer PHY package of multicast packet, is characterized in that, comprising:
Access point AP is the multicast partial association identifier PAID that site STA is calculated described STA, and wherein said AP compresses rear calculating to multiple associated identifiers AID and obtains an identical described multicast PAID;
Described AP arranges described multicast PAID in the physical layer convergence procedure protocol Data Unit PPDU of described multicast packet frame format.
2. transmission of multicast data packet method according to claim 1, is characterized in that,
If described PPDU frame format is short previous video frames form, described multicast PAID is arranged in the signal domain of described short previous video frames form; Or,
If described PPDU frame format is long preambles frame format, described multicast PAID is arranged in the signal A territory of described long preambles frame format.
3. according to the method for claim 1 or 2, it is characterized in that, the length of described multicast PAID is 6 bits, by described AP, described multicast AID is compressed and calculates rear acquisition.
4. a multicast PPDU frame transmission method, is characterized in that, comprising:
STA receives the data cell PPDU of the physical layer convergence procedure association frame of the multicast packet of AP transmission, and wherein, described multicast PPDU frame is sent at least two STA including described STA by described AP, and described multicast PAID is arranged in multicast PPDU frame;
The multicast AID that described STA distributes according to AP calculates described multicast PAID, and multicast PAID in more described multicast PPDU frame with described in the multicast PAID that calculates, judge whether described multicast PPDU frame is the multicast PPDU frame of corresponding described STA.
5. multicast PPDU frame transmission method according to claim 4, is characterized in that,
If described PPDU frame format is short previous video frames form, described multicast PAID is arranged in the signal domain of described short previous video frames form; Or,
If described PPDU frame format is long preambles frame format, described multicast PAID is arranged in the signal A territory of described long preambles frame format.
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| CN201310144338.XA CN104038903A (en) | 2013-03-06 | 2013-03-06 | Multicast data packet transmission method and apparatus |
| 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 |
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