CN103313304B - Aggregation method and device of A-MSDU as well as data reception method and device - Google Patents
Aggregation method and device of A-MSDU as well as data reception method and device Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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Abstract
An embodiment of the invention discloses an aggregation method of an A-MSDU. The aggregation method comprises: parts of MSDUs in a plurality of MSDUs are encapsulated based on a user-defined A-MSDU subframe structure and the rest MSDUs are encapsulated based on an A-MSDU subframe structure so as to form an A-MSDU structural body; or all of the plurality of MSDUs are encapsulated based on the user-defined A-MSDU subframe structure so as to form an A-MSDU structural body. The embodiment also discloses an aggregation device of the A-MSDU, a data reception method and a data receiver. With the aggregation method and device of the A-MSDU as well as the data reception method and device, aggregation efficiency of the A-MSDU can be improved.
Description
Technical field
The present invention relates to cordless communication network, more particularly to a kind of A-MSDU (Aggregation-Medium access
Control Service Data Unit, polymerization-media access control layer service data unit) polymerization and device, and
A kind of data receiver method and data recipient.
Background technology
BSS (Basic Service Set, Basic Service Set) is the base of WLAN (Wireless LAN, WLAN)
This component units, which includes multiple STA (Station, website).A kind of common form of BSS is to pass through one between each STA
The AP (Access point, access point) of full-time administrative BSS carries out radio communication, and the AP is also referred to as central location, can be by BSS
In one of STA realize or realize by router or by miscellaneous equipment that the BSS of this kind of form is referred to as with infrastructure
BSS.Another kind of common form of BSS is direct-connected between each STA communication, it is not necessary to through AP transfers, this kind of form
BSS is referred to as IBSS (Independent BSS, independent Basic Service Set).
A-MSDU polymerization techniques refer to the technology that multiple MSDU are polymerized to a larger load, and which generally occurs
MAC (Medium Access Control, medium education) layer.Specifically, receive from LLC (Logical in MAC layer
Link Control, logic connection control) layer multiple MSDU, if receive the concrete identical RA (Receive of multiple MSDU
Address, recipient address), TA (Transmit Address, sender address) and COS, then can be in MAC layer
The plurality of MSDU is aggregated into by A-MSDU structures using A-MSDU polymerization techniques.Current A-MSDU polymerization techniques, generally
It is that first each MSDU is encapsulated in A-MSDU subframes, multiple A-MSDU subframes is polymerized to into A-MSDU structures then.
Specifically, as shown in Table 1, be A-MSDU structures structural representation：
Table one
| A-MSDU subframes 1 | ...... | A-MSDU subframes n |
In Table 1, the structural representation of each A-MSDU subframe is as shown in Table 2：
Table two
| DA | SA | Length | MSDU | Padding |
Wherein, DA is the abbreviation of destination Address (destination address), refers to that MSDU is eventually arrived in a wlan
STA or AP address；SA refers to the abbreviation of Source Address (source address), refers to MSDU source STA or AP in a wlan
Address；The length of the MSDU that Length (length) is encapsulated in referring to the A-MSDU subframes；Padding (filling) is to ensure
The size of A-MSDU subframes is the integral multiple of 32bit and the field that arranges.
Further, after being polymerized to A-MSDU structures, in addition it is also necessary to increase MAC packet header for A-MSDU structures, form A-
MSDU packets, increased the signal of A-MSDU structures in MAC packet header as shown in Table 3：
Table three
Wherein, To DS (whereabouts service-domain mark) and From DS (from service-domain mark) are for indicating A-MSDU data
The substantially transmission direction of bag.For example, as (To DS=0, From DS=0), represent that the transmission direction of A-MSDU packets is
STA is passed to by STA is direct-connected；As (To DS=1, FromDS=0), represent that the transmission direction of A-MSDU packets is sent out by STA
AP is given, now comprising two kinds of situations：Need AP to turn or do not need AP in the mac layer to turn in the mac layer；When (To DS=0,
From DS=1) when, represent that the transmission direction of A-MSDU packets is STA to be sent to by AP, now comprising two kinds of situations：Through
Situation or do not turn through AP in the mac layer that AP turns in the mac layer.
For above-mentioned (To DS, From DS), the Address1-4's in MAC packet header in A-MSDU packets sets
Put as shown in Table 4：
Table four
| To DS | From DS | Address1 | Address2 | Address3 | Address4 |
| 0 | 0 | RA=DA | TA=SA | BSSID | N/A |
| 0 | 1 | RA=DA | TA=BSSID | BSSID | N/A |
| 1 | 0 | RA=BSSID | TA=SA | BSSID | N/A |
In table four, RA represents the address of recipient immediately, and TA represents the address of sender, and BSSID is in IBSS networks
The random number created by sender；BSSID refers to the address of AP in the network for possessing AP.
The content of the invention
Embodiment of the present invention technical problem to be solved is, there is provided a kind of A-MSDU polymerization efficiencies that can improve
A-MSDU polymerizations and device, and a kind of data receiver method and data recipient.
In order to solve above-mentioned technical problem, a kind of A-MSDU polymerizations are embodiments provided, including：
Part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining MSDU is according to A-
MSDU subframe structures are encapsulated, to form A-MSDU structures.
Correspondingly, the embodiment of the present invention additionally provides a kind of A-MSDU polymerizations, including：
Whole MSDU in multiple MSDU are encapsulated according to self-defined A-MSDU subframe structures, to form A-MSDU structures
Body.
Correspondingly, the embodiment of the present invention additionally provides a kind of data receiver method, including：
A-MSDU packets are received, the A-MSDU packets include：MAC packet header and the A- with multiple subframe structures
MSDU structures, all self-defined A-MSDU subframe structures of the subframe structure, or part are self-defined A-MSDU subframes
Structure, remaining part are A-MSDU subframe structures；
Parse the A-MSDU packets.
Correspondingly, the embodiment of the present invention additionally provides a kind of A-MSDU polyplants, including：
Package module, for the part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining
MSDU according to A-MSDU subframe structures encapsulate, to form A-MSDU structures.
Correspondingly, the embodiment of the present invention additionally provides a kind of A-MSDU polyplants, including：
Package module, for the whole MSDU in multiple MSDU are encapsulated according to self-defined A-MSDU subframe structures, with shape
Into A-MSDU structures.
Correspondingly, the embodiment of the invention also discloses a kind of data receiver, including：
Receiver module, for receiving A-MSDU packets, the A-MSDU packets include：MAC packet header has many height
The A-MSDU structures of frame structure, all self-defined A-MSDU subframe structures of the subframe structure, or part are self-defined
A-MSDU subframe structures, remaining part are A-MSDU subframe structures；
Parsing module, for parsing the A-MSDU packets.
Implement the embodiment of the present invention, have the advantages that：
The embodiment of the present invention is due to when being packaged to multiple MSDU, partly or entirely sub using self-defined A-MSDU
Frame structure is packaged, therefore can improve the polymerization efficiency of A-MSDU polymerization techniques.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the embodiment of the A-MSDU polymerizations of the present invention；
Fig. 2 is the schematic flow sheet of the embodiment of the data transmission method for uplink of the present invention；
Fig. 3 is the schematic flow sheet of the embodiment of the data receiver method of the present invention；
Fig. 4 is the configuration diagram of the embodiment of the A-MSDU polyplants of the present invention；
Fig. 5 is the structural representation of the embodiment of the data sender of the present invention；
Fig. 6 is the structural representation of the embodiment of the data receiver of the present invention.
Specific 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 carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
For A-MSDU polymerization techniques, inventor has found in actual applications, as (To DS=0, From DS=0),
Due to setting and each A- of RA=DA, TA=SA, therefore Address1 (the first address) and Address2 (the second address)
The setting of the DA and SA of the MSDU encapsulated in MSDU subframes is identical, hence in so that there is information redundancy in A-MSDU polymerization processes
(mainly RA and TA redundancies), reduces the polymerization efficiency of A-MSDU.Specifically, the structure of A-MSDU packets in such cases
Illustrate as shown in Table 5：
Table five
When (To DS=1, From DS=0) and do not need AP turn in the mac layer when, due to DA=BSSID, then
Address1 and Address2 are equally identical with the setting of the DA and SA of the MSDU encapsulated in each A-MSDU subframe, therefore make
Obtain and occur information redundancy (redundancy of mainly BSSID and TA) in A-MSDU polymerization processes, so as to reduce the poly- of A-MSDU
Close efficiency.Specifically, the structural representation of A-MSDU packets is as shown in Table 6 in such cases：
Table six
When not turning as (To DS=0, From DS=1) and in the mac layer through AP, due to SA=BSSID, then
Address1 and Address2 are equally identical with the setting of DA and SA in each A-MSDU subframe, therefore will cause in A-
Occurs information redundancy (being primarily referred to as RA and BSSID redundancies) in MSDU polymerization processes, so as to reduce the polymerization efficiency of A-MSDU.
Specifically, the structural representation of A-MSDU packets in such cases is as shown in Table 7：
Table seven
Therefore, based on there is information redundancy in above-mentioned A-MSDU polymerization processes, the problem of A-MSDU polymerization efficiencies is reduced,
Fig. 1 is refer to, is the schematic flow sheet of the embodiment of A-MSDU polymerizations proposed by the present invention, the executive agent of the method can
To be A-MSDU polyplants, the A-MSDU polyplants can be website or access point, certainly the A-MSDU polyplants
Can be the equipment on being integrated in website or access point, specifically methods described includes：
Step S11, the part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining MSDU
Encapsulate according to A-MSDU subframe structures, to form A-MSDU structures；Or, by the whole MSDU in multiple MSDU according to certainly
The encapsulation of A-MSDU subframe structures is defined, to form A-MSDU structures.
Wherein, the multiple MSDU in step S11 meet A-MSDU polymerizing conditions, and A-MSDU polymerizing conditions are：Multiple MSDU
Recipient address are identical, sender address is identical identical with COS.Due to recipient address and the transmission of multiple MSDU
Square address is identical, therefore the transmission direction of the plurality of MSDU is also identical, the transmission direction also phase with the A-MSDU structures for being formed
Together, it is and also identical with the transmission direction of the A-MSDU packets for carrying the A-MSDU structures.
In step s 11, A-MSDU subframe structures mainly include as shown in aforementioned table two：Da field, sa field,
Length fields, MSDU fields and Padding fields.Self-defined A-MSDU subframe structures as shown in Table 8, including：Length words
Section, MSDU fields and Padding fields, it should be noted that the effect of Padding fields is oneself after ensureing to encapsulate MSDU
The size for defining A-MSDU subframe structures is the integral multiple of 32bit, therefore Padding fields is whether dissimilar.With A-
MSDU subframe structures are compared, and self-defined A-MSDU subframe structures have mainly lacked da field and sa field, therefore adopt self-defined A-
MSDU subframe structures can reduce the encapsulation to da field and sa field, so as to improve A-MSDU polymerization efficiencies.
Table eight
| Length | MSDU | Padding |
Further, it is partly or all to tie according to self-defined A-MSDU subframes in multiple MSDU described in step S 11
Structure is packaged mainly relevant with the transmission direction of MSDU.In the present embodiment, the transmission direction of the MSDU being related to mainly includes
Three kinds below：
The first, from website to the direct-connected transmission of website, now (To DS=0, From DS=0), RA=DA, TA=SA.
Secondth, transmitted to access point from website and do not need described access point to turn in the mac layer, now (To DS=1,
From DS=0), and RA=BSSID=DA, TA=SA.
The third, turned from access point in the mac layer to station transmission and not through described access point, now (To DS=
0, From DS=1), RA=DA, TA=BSSID=SA.
Preferably, when MSDU transmission direction for it is above-mentioned the first when, the whole described in step S11 in multiple MSDU
MSDU is packaged according to self-defined A-MSDU subframe structures.The signal of the A-MSDU structures for now being formed is as shown in nine.
Table nine
| Self-defined A-MSDU subframes 1 | ...... | Self-defined A-MSDU subframes n |
Preferably, when MSDU transmission direction be above-mentioned second or the third when, described in step S11 in multiple MSDU
First MSDU encapsulate according to A-MSDU subframe structures, remaining MSDU encapsulated according to self-defined A-MSDU subframe structures.Its
In, first MSDU refers to the MSDU for needing to encapsulate first, and which can be any one in multiple MSUD, after the completion of encapsulation, its
In first subframe structure of A-MSDU structures.
It should be noted that when MSDU be transmitted as it is above-mentioned the first when, it would however also be possible to employ in this optimal way will be many
First MSDU in individual MSDU is encapsulated according to A-MSDU subframe structures, and remaining MSDU is according to self-defined A-MSDU subframe structures
Encapsulation.
It should be noted that when will encapsulate first MSDU according to A-MSDU subframe structures, by the DA words of A-MSDU subframes
Section is set to the first indicated value, and sa field is set to the second indicated value, and the first indicated value can also may be used with identical with the second indicated value
To differ, the first indicated value and the second indicated value are disposed as into BSSID or full 0 or complete 1 preferentially.
Specifically, the da field is set to into the first indicated value, sa field is set to the two of the purpose of the second indicated value
It is individual：One is for when A-MSDU structures are parsed, indicating that the remaining part of the A-MSDU structures is according to self-defined A-
MSDU subframe structures are encapsulated；Two is the transmission direction for MSDU is indicated together with the To DS and From DS in MAC packet header.Cause
This should not take (the first indicated value=BSSID, the second indicated value=TA) when the transmission direction of MSDU is above-mentioned second, when
The transmission direction of MSDU for it is above-mentioned the third when, (the first indicated value=RA, the second indicated value=BSSID) should not be taken because this
Can not be allowed to make a distinction with the existing mode for all encapsulating according to A-MSDU subframe structures, it is impossible to realize more than above-mentioned instruction
Bottom is divided into the effect encapsulated according to self-defined A-MSDU subframe structures；In addition, when the transmission direction of MSDU is above-mentioned second
When, the value of da field and sa field when should not be taken as needing access point to do transfer by (the first indicated value, the second indicated value), because
Can so cause to indicate the transmission direction of mistake, with should MSDU transmission direction for it is above-mentioned the third when, should not be by (first
Indicated value, the second indicated value) value of da field and sa field when access point does transfer is taken as, because so also resulting in finger
The transmission direction of mistake is shown.
Table ten is a kind of signal of A-MSDU structures of this optimal way.
Table ten
Preferably, when the transmission direction of MSDU is any one in above-mentioned three kinds, described in step S11 in multiple MSDU
Whole MSDU be packaged according to self-defined A-MSDU subframe structures.All according to self-defined A-MSDU subframes in step S11
After structure is packaged, the section start also in A-MSDU structures arranges indication field, and the value of the indication field is set to finger
Indicating value.The effect of wherein indicated value has two：One be indicate A-MSDU structures in whole MSDU it is sub according to self-defined A-MSDU
Frame structure is encapsulated；Two transmission directions for being indicated for MSDU, specifically when the transmission direction of MSDU is above-mentioned second and the
When three kinds, indicated value indicates the transmission direction of MSDU together with (To DS, From DS).In one embodiment, indicate word
Section could be arranged to 8 (the 0th to the 7th), wherein the 0th used as indicating bit, the 1st to the 7th as reserved bit, when the 0th
The value of position is " 1 ", with two above-mentioned effects.
Table 11 is a kind of signal of A-MSDU structures of this optimal way.
Table 11
As the embodiment of the present invention is when MSDU is encapsulated, partly or entirely carried out using self-defined A-MSDU subframe structures
Encapsulation, and self-defined A-MSDU subframe structures are compared with traditional A-MSDU subframe structures, can be without encapsulating da field and SA
Field, therefore MSDU is encapsulated using self-defined A-MSDU subframe structures whole or in part, A-MSDU polymerization techniques can be improved
Polymerization efficiency.
Fig. 2 is refer to, is a kind of schematic flow sheet of the embodiment of the data transmission method for uplink of the present invention, methods described is held
Row main body can be data sender, and data sender can be by website or access point realization, and specifically methods described includes：
Step S21, forms A-MSDU structures according to the A-MSDU polymerizations in Fig. 1 embodiments.
The A-MSDU packets for carrying the A-MSDU structures are sent to data receiver by step S22.
Wherein, step S22 mainly includes：MAC packet header is encapsulated for the A-MSDU structures that step S21 is formed, to form A-
MSDU packets.Mainly include for A-MSDU structures encapsulation MAC packet header：To DS and From DS in MAC packet header is carried out
Arrange, To DS and From DS can represent the substantially transmission direction of A-MSDU packets；And to first in MAC packet header
The setting of address field (Address1) and the second address field (Address2), the first address field are set to A-MSDU data
The recipient address immediately of bag, the second address field are set to the sender address of A-MSDU packets.
The present embodiment, due to forming A-MSDU structures, therefore its tool using the A-MSDU polymerizations in Fig. 1 embodiments
The beneficial effect of the raising A-MSDU polymerization efficiencies having described in Fig. 1 embodiments.Also, due to carrying for A-MSDU polymerization efficiencies
Height, will improve the transmission rate of A-MSDU packets, so as to increase the treatment effeciency of data sender.
Fig. 3 is refer to, is a kind of schematic flow sheet of the embodiment of the data receiver method of the present invention, methods described is held
Row main body can be data receiver, and the data receiver can be realized by website or access point, specifically, methods described bag
Include：
Step S31, receives A-MSDU packets.
Wherein, A-MSDU packets include：MAC packet header and the A-MSDU structures with multiple subframe structures, the son
The all self-defined A-MSDU subframe structures of frame structure, or part for self-defined A-MSDU subframe structures, remaining part be A-
MSDU subframe structures.
Specifically, MAC packet header includes：To DS, From DS, the first address field (Address1) and the second address field
(Address2) setting.To DS and From DS fields are indicated for the substantially transmission direction of A-MSDU packets, and first
Address field is indicated for the recipient address immediately of A-MSDU packets, and the second address field is indicated for A-MSDU numbers
According to the sender address of bag.
Specifically, A-MSDU subframe structures are as shown in aforementioned table two, including：Da field, sa field, Length fields,
MSDU fields and Padding fields.Self-defined A-MSDU subframe structures as shown in Table 8, including：Length fields, MSDU fields
With Padding fields, compared with A-MSDU subframe structures, self-defined A-MSDU subframe structures have mainly lacked da field and SA words
Section.
Step S32, the A-MSDU packets that analyzing step S31 is received.
Wherein, mainly include two-part parsing when A-MSDU packets are parsed in step S32, one is MAC packet header, another
It is A-MSDU structures.
Further, it is technology well-known to those skilled in the art to the parsing of MAC bags, will not be described here, this enforcement
Example it is follow-up in mainly can use from MAC packet header parse To DS fields, From DS fields, the first address field and the
The value of double-address field.
In one embodiment, when parsing MAC packet header is solved, if (To DS=0, From DS=0), then A-MSDU data
The transmission direction of bag is that, from website to the direct-connected transmission of website, therefore all subframe structures in A-MSDU structures can be with excellent
Elect self-defined A-MSDU subframe structures as, then step S32 is according in self-defined A-MSDU subframe structures parsing A-MSDU structures
Subframe structure.
Specifically, the operation according to the subframe structure in self-defined A-MSDU subframe structures parsing A-MSDU structures is main
Including：Parse A-MSDU structures in subframe structure when, the value of the first address field is encapsulated as in subframe structure
The destination address of MSDU, the source address of the MSDU that the value of the second address field is encapsulated as in subframe structure.
In another embodiment, when parsing MAC packet header is solved, if (To DS=1, From DS=0) or (To DS=
0, From DS=1), then can only now represent A-MSDU packets substantially transmission direction be from website to access point or by
Access point is to website；Therefore step S32 is further sub according to first of A-MSDU subframe structures parsing A-MSDU structures
Frame structure；When the da field of first subframe structure is the first indicated value, the value of sa field is the second indicated value, wherein first refers to
The implication of indicating value and the second indicated value is as described in Fig. 1 embodiments, and preferably BSSID or full 0 or complete 1, then first being capable of table
The transmission direction of bright A-MSDU packets be second in Fig. 1 embodiments or the third, next can show that remaining all
Subframe structure is self-defined A-MSDU subframe structures, then step S32 is according to self-defined A-MSDU subframe structures parsing A-MSDU knots
Remaining subframe structure in structure body.It should be noted that if da field in first subframe structure is the first indicated value, SA words
When section is the second indicated value, then the destination of the MSDU for the value of the first address field being encapsulated as in first subframe structure
Location, the source address of the MSDU that the value of the second address field is encapsulated as in first subframe structure.
Specifically, step S32 is according to remaining subframe knot in self-defined A-MSDU subframe structures parsing A-MSDU structures
The operation of structure mainly includes：Parse A-MSDU structures in remaining subframe structure when, using the value of the first address field as
The destination address of the MSDU encapsulated in subframe structure, the source of the MSDU that the value of the second address field is encapsulated as in subframe structure
Address.
In another embodiment, as (To DS=0, From DS=0) or (To DS=1, From DS=0) or
When (To DS=0, From DS=1), except (To DS=0, From DS=0) can represent the transmission of the packet of A-MSDU
Direction is to be connected directly to outside website by website, and remaining is either way only capable of the substantially transmission direction of the packet for indicating A-MSDU.
Therefore the indication field positioned at A-MSDU structure section starts is further parsed in step S32, whether see the value of indication field
It is set to for indicated value, herein the implication and work of the indication field and indicated value in indication field and indicated value and Fig. 1 embodiments
With identical, will not be described here；If indication field is set to for indicated value, then it represents that whole subframe structure in A-MSDU structures
Self-defined A-MSDU subframe structures are, then the subframe in A-MSDU structures is parsed according to self-defined A-MSDU subframe structures
Structure.
Specifically, the operation according to the subframe structure in self-defined A-MSDU subframe structures parsing A-MSDU structures is main
Including：Parse A-MSDU structures in subframe structure when, the value of the first address field is encapsulated as in subframe structure
The destination address of MSDU, the source address of the MSDU that the value of the second address field is encapsulated as in subframe structure.
The data receiver method of the present embodiment, it is partly or entirely self-defined due to including in the A-MSDU packets of reception
A-MSDU subframe structures, and self-defined A-MSDU subframe structures are compared with traditional A-MSDU subframe structures, not including da field
And sa field, therefore the speed that data receiver parses self-defined A-MSDU subframe structures can be improved, connect so as to improve data
Debit receives the speed of A-MSDU packets, improves the treatment effeciency of data receiver.
The device embodiment corresponding to said method flow process is described below.
Fig. 4 is refer to, is the structural representation of the embodiment of the A-MSDU polyplants of the present invention, the A-MSDU polymerizations
Device 4 includes：
Package module 41, for the part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, its
Remaining MSDU is encapsulated according to A-MSDU subframe structures, to form A-MSDU structures.
Or, the package module 41, for will be the whole MSDU in the plurality of MSDU according to self-defined A-MSDU
Frame structure is encapsulated, to form A-MSDU structures.
Wherein, multiple MSDU meet A-MSDU polymerizing conditions, and A-MSDU polymerizing conditions are：The recipient address of multiple MSDU
Identical, sender address is identical identical with COS.Due to the recipient address of multiple MSDU it is identical with sender address, because
The transmission direction of this plurality of MSDU is also identical, with formed A-MSDU structures transmission direction it is also identical, and with carrying
The transmission direction of the A-MSDU packets of the A-MSDU structures is also identical.
A-MSDU subframe structures as shown in aforementioned table two, including：Da field, sa field, Length fields, MSDU fields and
Padding fields.Self-defined A-MSDU subframe structures as shown in Table 8, including：Length fields, MSDU fields and Padding
Field, compared with A-MSDU subframe structures, self-defined A-MSDU subframe structures have mainly lacked da field and sa field, therefore adopt
Self-defined A-MSDU subframe structures can reduce the encapsulation to da field and sa field, so as to improve polymerization efficiency.
Further, it will partly or all tie according to self-defined A-MSDU subframes in multiple MSDU that package module 41 is
Structure is packaged mainly relevant with the transmission direction of MSDU.In the present embodiment, the transmission direction of the MSDU being related to mainly includes
Three kinds below：
The first, from website to the direct-connected transmission of website, now (To DS=0, From DS=0), RA=DA, TA=SA.
Secondth, transmitted to access point from website and do not need described access point to turn in the mac layer, now (To DS=1,
From DS=0), and RA=BSSID=DA, TA=SA.
The third, turned from access point in the mac layer to station transmission and not through described access point, now (To DS=
0, From DS=1), RA=DA, TA=BSSID=SA.
Preferably, when MSDU transmission direction for it is above-mentioned the first when, package module 41 will be complete in the plurality of MSDU
Portion MSDU is packaged according to self-defined A-MSDU subframe structures.Such as nine institute of signal of the A-MSDU structures of formation now
Show.
Preferably, when MSDU transmission direction be above-mentioned second or the third when, package module 41 will be the plurality of
First MSDU in MSDU is encapsulated according to A-MSDU subframe structures, and remaining MSDU is sealed according to self-defined A-MSDU subframe structures
Dress.It should be noted that first MSDU refers to the MSDU for needing to encapsulate first, after the completion of encapsulation, which is located at A-MSDU structures
First subframe structure in.
It should be noted that when package module 41 is for encapsulating first MSDU according to A-MSDU subframe structures, by A-
The da field of MSDU subframes is set to the first indicated value, and sa field is set to the second indicated value, and the first indicated value and second is indicated
Value can be with identical, it is also possible to differs, and the first indicated value and the second indicated value are disposed as BSSID or full 0 or complete preferentially
1。
Specifically, the da field is set to into the first indicated value, sa field is set to the two of the purpose of the second indicated value
It is individual：One is for when A-MSDU structures are parsed, indicating that the remaining part of the A-MSDU structures is according to self-defined A-
MSDU subframe structures are encapsulated；Two is the transmission direction for MSDU is indicated together with the To DS and From DS in MAC packet header.Cause
This should not take (the first indicated value=BSSID, the second indicated value=TA) when the transmission direction of MSDU is above-mentioned second, when
The transmission direction of MSDU for it is above-mentioned the third when, (the first indicated value=RA, the second indicated value=BSSID) should not be taken because this
Can not be allowed to make a distinction with the existing mode for all encapsulating according to A-MSDU subframe structures, it is impossible to realize more than above-mentioned instruction
Bottom is divided into the effect encapsulated according to self-defined A-MSDU subframe structures；In addition, when the transmission direction of MSDU is above-mentioned second
When, the value of da field and sa field when should not be taken as needing access point to do transfer by (the first indicated value, the second indicated value), because
Can so cause to indicate the transmission direction of mistake, with should MSDU transmission direction for it is above-mentioned the third when, should not be by (first
Indicated value, the second indicated value) value of da field and sa field when access point does transfer is taken as, because so also resulting in
Indicate the transmission direction of mistake.
Table ten is a kind of signal of A-MSDU structures of this optimal way.
Preferably, when the transmission direction of MSDU is any one in above-mentioned three kinds, package module 41 is used for will be described more
Whole MSDU in individual MSDU are packaged according to self-defined A-MSDU subframe structures.Package module 41 is used for will be the plurality of
After MSDU is all packaged according to self-defined A-MSDU subframe structures, the section start also in A-MSDU structures is arranged and indicates word
Section, and the value of the indication field is set to into indicated value.The effect of wherein indicated value has two：During one is instruction A-MSDU structures
Whole MSDU are encapsulated according to self-defined A-MSDU subframe structures；Two transmission directions for being indicated for MSDU, specifically work as MSDU
Transmission direction be above-mentioned second and the third when, indicated value and (To DS, From DS) indicate the transmission side of MSDU together
To.In one embodiment, indication field could be arranged to 8 (the 0th to the 7th), wherein the 0th used as indicating bit,
1st to the 7th, as reserved bit, when the value of the 0th is " 1 ", acts on above-mentioned two.
Table 11 is a kind of signal of A-MSDU structures of this optimal way.
The embodiment of the present invention is adopted as package module 41 is when being packaged to multiple MSDU, partly or entirely and is made by oneself
Adopted A-MSDU subframe structures are packaged, therefore can improve the polymerization efficiency of A-MSDU polymerization techniques.
As the embodiment of the present invention is when MSDU is encapsulated, partly or entirely carried out using self-defined A-MSDU subframe structures
Encapsulation, and self-defined A-MSDU subframe structures are compared with traditional A-MSDU subframe structures, can be without encapsulating da field and SA
Field, therefore MSDU is encapsulated using self-defined A-MSDU subframe structures whole or in part, A-MSDU polymerization techniques can be improved
Polymerization efficiency.
Refer to Fig. 5, be the present invention a kind of data sender embodiment structural representation, the data sender
5 include：
A-MSDU polyplants 4 in Fig. 4 embodiments, for forming A-MSDU structures.
Processing module 52, for the A-MSDU packets for carrying the A-MSDU structures are sent to data receiver
Side.
Wherein, processing module 52 is mainly used in the A-MSDU structures encapsulation MAC bags formed for A-MSDU polyplants 4
Head, to form A-MSDU packets.Mainly include for A-MSDU structures encapsulation MAC packet header：To the To DS in MAC packet header and
From DS are configured, and To DS and From DS can represent the substantially transmission direction of A-MSDU packets；And to MAC bags
The setting of the first address field (Address1) and the second address field (Address2) in head, the first address field are set to
The recipient address immediately of A-MSDU packets, the second address field are set to the sender address of A-MSDU packets.
The present embodiment, forms A-MSDU structures, therefore its due to using the A-MSDU polyplants in Fig. 4 embodiments
Beneficial effect with the raising A-MSDU polymerization efficiencies described in Fig. 4 embodiments.Also, due to carrying for A-MSDU polymerization efficiencies
Height, will improve the transmission rate of A-MSDU packets, so as to increase the treatment effeciency of data sender.
Refer to Fig. 6, be the present invention a kind of data receiver embodiment structural representation, the data receiver
6 include：
Receiver module 61, for receiving A-MSDU packets.
Wherein, A-MSDU packets include：MAC packet header and the A-MSDU structures with multiple subframe structures, the son
The all self-defined A-MSDU subframe structures of frame structure, or part for self-defined A-MSDU subframe structures, remaining part be A-
MSDU subframe structures.
Specifically, MAC packet header includes：To DS, From DS, the first address field (Address1) and the second address field
(Address2) setting.To DS and From DS fields are indicated for the substantially transmission direction of A-MSDU packets, and first
Address field is indicated for the recipient address immediately of A-MSDU packets, and the second address field is indicated for A-MSDU numbers
According to the sender address of bag.
Specifically, A-MSDU subframe structures are as shown in aforementioned table two, including：Da field, sa field, Length fields,
MSDU fields and Padding fields.Self-defined A-MSDU subframe structures as shown in Table 8, including：Length fields, MSDU fields
With Padding fields, compared with A-MSDU subframe structures, self-defined A-MSDU subframe structures have mainly lacked da field and SA words
Section.
Parsing module 62, for parsing the A-MSDU packets of the reception of the receiver module 61.
Wherein, mainly include two-part parsing when A-MSDU packets are parsed in parsing module 62, one is MAC packet header,
Another is A-MSDU structures.
Further, parsing of the parsing module 62 to MAC bags is technology well-known to those skilled in the art, and here is not gone to live in the household of one's in-laws on getting married
State, the present embodiment it is follow-up in mainly can use from MAC packet header parse To DS fields, From DS fields, the first ground
The value of location field and the second address field.
In one embodiment, parsing module 62 solve parsing MAC packet header when, if find (To DS=0, From DS=
0), then the transmission direction of A-MSDU packets is therefore all sons in A-MSDU structures from website to the direct-connected transmission of website
Frame structure can be self-defined A-MSDU subframe structures, then parsing module 62 parses A- according to self-defined A-MSDU subframe structures
Subframe structure in MSDU structures.
Specifically, parsing module 62 parses the subframe knot in A-MSDU structures according to self-defined A-MSDU subframe structures
The operation of structure mainly includes：Parse A-MSDU structures in subframe structure when, using the value of the first address field as subframe
The destination address of the MSDU encapsulated in structure, the source ground of the MSDU that the value of the second address field is encapsulated as in subframe structure
Location.
In another embodiment, parsing module 62 solve parsing MAC packet header when, if find (To DS=1, From DS
=0) or (To DS=0, From DS=1), then can only now represent that the substantially transmission direction of A-MSDU packets is by website
To access point or from access point to website；Therefore parsing module 62 further parses A-MSDU according to A-MSDU subframe structures
First subframe structure of structure；When parsing module 62 find first subframe structure da field be the first indicated value, SA
The value of field is the second indicated value, wherein the implication of the first indicated value and the second indicated value is as described in Fig. 1 embodiments, and preferably
For BSSID or full 0 or complete 1, then can show that first A-MSDU packets transmission direction be second in Fig. 4 embodiments or
The third, next can show that remaining all subframe structures for self-defined A-MSDU subframe structures, then parsing module 62 according to
Remaining subframe structure in self-defined A-MSDU subframe structures parsing A-MSDU structures.If it should be noted that first sub
Da field in frame structure is the first indicated value, and when sa field is the second indicated value, then parsing module 62 is by the first address field
Value as the MSDU encapsulated in first subframe structure destination address, using the value of the second address field as first subframe
The source address of the MSDU encapsulated in structure.
Specifically, parsing module 62 is according to remaining subframe in self-defined A-MSDU subframe structures parsing A-MSDU structures
The operation of structure mainly includes：In A-MSDU structures are parsed during remaining subframe structure, the value of the first address field is made
The destination address of the MSDU to encapsulate in subframe structure, the MSDU's that the value of the second address field is encapsulated as in subframe structure
Source address.
In another embodiment, parsing module 62 solve parsing MAC packet header when, if find (To DS=0, From DS
=0) or when (To DS=1, From DS=0) or (To DS=0, From DS=1), except (To DS=0, From DS=
0) transmission direction that can represent the packet of A-MSDU is to be connected directly to outside website by website, and remaining is either way only capable of indicating
The substantially transmission direction of the packet of A-MSDU.Therefore parsing module 62 is further parsed and is located at A-MSDU structure section starts
Indication field, see whether the value of indication field is set to for indicated value, herein in indication field and indicated value and Fig. 4 embodiments
Indication field it is identical with effect with the implication of indicated value, will not be described here；If indication field is set to for indicated value, then it represents that
In A-MSDU structures, whole subframe structures is self-defined A-MSDU subframe structures, then parsing module 62 is according to self-defined A-
Subframe structure in MSDU subframe structures parsing A-MSDU structures.
Specifically, parsing module 62 parses the subframe structure in A-MSDU structures according to self-defined A-MSDU subframe structures
Operation mainly include：Parse A-MSDU structures in subframe structure when, using the value of the first address field as subframe tie
The destination address of the MSDU encapsulated in structure, the source address of the MSDU that the value of the second address field is encapsulated as in subframe structure.
The data receiver of the present embodiment, due to including partly or entirely self-defined A- in the A-MSDU packets of reception
MSDU subframe structures, and self-defined A-MSDU subframe structures are compared with traditional A-MSDU subframe structures, not including da field and
Sa field, therefore the speed that data receiver parses self-defined A-MSDU subframe structures can be improved, so as to improve data receiver
Side receives the speed of A-MSDU packets, improves the treatment effeciency of data receiver.
One of ordinary skill in the art will appreciate that all or part of flow process in realizing above-described embodiment method, can be
Instruct related hardware to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Above disclosed is only present pre-ferred embodiments, and the right model of the present invention can not be limited certainly with this
Enclose, one of ordinary skill in the art will appreciate that all or part of flow process of above-described embodiment is realized, and will according to right of the present invention
Made equivalent variations are sought, the covered scope of invention is still fallen within.
Claims (8)
1. a kind of polymerization-media access control layer service data unit A-MSDU polymerizations, it is characterised in that include：
Part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining MSDU it is sub according to A-MSDU
Frame structure is encapsulated, to form A-MSDU structures；
Wherein, the part MSDU by multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining MSDU is pressed
Encapsulate according to A-MSDU subframe structures, including：
When the transmission direction of arbitrary MSDU in the plurality of MSDU is to be transmitted to access point from website and do not need described access point
When turning in the mac layer, or when the transmission direction of arbitrary MSDU in the plurality of MSDU is from access point to station transmission and is not had
When there are Jing described access points to turn in the mac layer, first MSDU in the plurality of MSDU is sealed according to A-MSDU subframe structures
Dress, and the da field in the A-MSDU subframe structures is set to into the first indicated value, sa field is set to the second indicated value, its
Remaining MSDU is encapsulated according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
2. a kind of A-MSDU polymerizations, it is characterised in that include：
Whole MSDU in multiple MSDU are encapsulated according to self-defined A-MSDU subframe structures, to form A-MSDU structures；
Wherein, the whole MSDU by multiple MSDU are encapsulated according to self-defined A-MSDU subframe structures, to form A-MSDU
Structure, including：
When the transmission direction of arbitrary MSDU in the plurality of MSDU is transmission direct-connected to website from website, or when the plurality of
When in MSDU, the transmission direction of arbitrary MSDU is to be transmitted to access point from website and do not need described access point to turn in the mac layer,
Or when the transmission direction of arbitrary MSDU in the plurality of MSDU is for access point is to station transmission and no Jing described access points exist
During MAC layer transfer, the whole MSDU in the plurality of MSDU are encapsulated according to self-defined A-MSDU subframe structures, form A-MSDU
Structure, and, the value of the indication field positioned at the A-MSDU structures section start is set to into indicated value, it is described complete to indicate
Portion MSDU is encapsulated according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
3. a kind of data receiver method, it is characterised in that include：
A-MSDU packets are received, the A-MSDU packets include：MAC packet header and the knots of the A-MSDU with multiple subframe structures
Structure body, all self-defined A-MSDU subframe structures of the subframe structure, or part be self-defined A-MSDU subframe structures, remaining
Bottom is divided into A-MSDU subframe structures；
Parse the A-MSDU packets；
Wherein, include the step of the parsing A-MSDU packets：
When the value of the To DS fields in the MAC packet header and From DS fields is respectively 0,1 or 1,0, according to A-MSDU
Subframe structure parses first subframe structure in the A-MSDU structures, and, when in first subframe structure
Da field is the first indicated value, when sa field is the second indicated value, the recipient address immediately of the A-MSDU packets is made
The destination address of the MSDU to encapsulate in first subframe structure, using the sender address of the A-MSDU packets as
The source address of the MSDU, and, remaining son in the A-MSDU structures is parsed according to self-defined A-MSDU subframe structures
Frame structure；Or
When the value of the To DS fields in the MAC packet header and From DS fields is 0 or respectively 0,1 or is respectively
1st, 0 when, parsing positioned at the A-MSDU structures section start indication field value, and, when the value of the indication field is
During indicated value, the subframe structure in the A-MSDU structures is parsed according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
4. method as claimed in claim 3, it is characterised in that parse A-MSDU structures according to self-defined A-MSDU subframe structures
Subframe structure in body includes：
The destination address of the MSDU that the recipient address immediately of the A-MSDU packets are encapsulated as in the subframe structure,
Using the sender address of the A-MSDU packets as the MSDU source address.
5. a kind of A-MSDU polyplants, it is characterised in that include：
Package module, for the part MSDU in multiple MSDU is encapsulated according to self-defined A-MSDU subframe structures, remaining
MSDU is encapsulated according to A-MSDU subframe structures, to form A-MSDU structures；
Wherein, the package module, specifically for when in the plurality of MSDU the transmission direction of arbitrary MSDU be from website to connecing
When access point is transmitted and is not needed described access point to turn in the mac layer or when the transmission direction of arbitrary MSDU in the plurality of MSDU
It is from access point to station transmission and when no Jing described access points turn in the mac layer, by first in the plurality of MSDU
MSDU encapsulated according to A-MSDU subframe structures, and the da field in the A-MSDU subframe structures is set to the first indicated value,
Sa field is set to the second indicated value, and remaining MSDU is encapsulated according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
6. a kind of A-MSDU polyplants, it is characterised in that include：
Package module, for the whole MSDU in multiple MSDU are encapsulated according to self-defined A-MSDU subframe structures, to form A-
MSDU structures；
Wherein, the package module, is from website to station specifically for working as the transmission direction of arbitrary MSDU in the plurality of MSDU
During the direct-connected transmission of point, or when the transmission direction of arbitrary MSDU in the plurality of MSDU is to be transmitted and be not required to access point from website
When wanting described access point to turn in the mac layer, or when arbitrary MSDU in the plurality of MSDU transmission direction be access point to station
When point is transmitted and no Jing described access points turn in the mac layer, by the whole MSDU in the plurality of MSDU according to self-defined A-
MSDU subframe structures are encapsulated, and form A-MSDU structures, and, by the indication field positioned at the A-MSDU structures section start
Value be set to indicated value, to indicate that whole MSDU are encapsulated according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
7. a kind of data receiver, it is characterised in that include：
Receiver module, for receiving A-MSDU packets, the A-MSDU packets include：MAC packet header and have multiple subframes
The A-MSDU structures of structure, all self-defined A-MSDU subframe structures of the subframe structure, or part are self-defined A-
MSDU subframe structures, remaining part are A-MSDU subframe structures；
Parsing module, for parsing the A-MSDU packets；
Wherein, the parsing module specifically for：
When the value of the To DS fields in the MAC packet header and From DS fields is respectively 0,1 or 1,0, according to A-MSDU
Subframe structure parses first subframe structure in the A-MSDU structures, and, when in first subframe structure
Da field is the first indicated value, when sa field is the second indicated value, the recipient address immediately of the A-MSDU packets is made
The destination address of the MSDU to encapsulate in first subframe structure, using the sender address of the A-MSDU packets as
The source address of the MSDU, and, remaining son in the A-MSDU structures is parsed according to self-defined A-MSDU subframe structures
Frame structure；Or
When the value of the To DS fields in the MAC packet header and From DS fields is 0 or respectively 0,1 or is respectively
1st, 0 when, parsing positioned at the A-MSDU structures section start indication field value, and, when the value of the indication field is
During indicated value, the subframe structure in the A-MSDU structures is parsed according to self-defined A-MSDU subframe structures；
Wherein, the self-defined A-MSDU subframe structures do not include da field and sa field.
8. data receiver as claimed in claim 7, it is characterised in that
The parsing module, for parsing according to self-defined A-MSDU subframe structures during the subframe structure in A-MSDU structures,
The destination address of the MSDU that the recipient address immediately of the A-MSDU packets are encapsulated as in the subframe structure, by institute
State the source address of the sender address as the MSDU of A-MSDU packets.
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| CN201210064724.3A CN103313304B (en) | 2012-03-13 | 2012-03-13 | Aggregation method and device of A-MSDU as well as data reception method and device |
| PCT/CN2013/071015 WO2013135116A1 (en) | 2012-03-13 | 2013-01-28 | A-msdu aggregation method and apparatus, data reception method and apparatus |
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| CN201210064724.3A CN103313304B (en) | 2012-03-13 | 2012-03-13 | Aggregation method and device of A-MSDU as well as data reception method and device |
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| CN106068661B (en) * | 2014-04-28 | 2019-10-01 | 华为技术有限公司 | The device and method of frame aggregation and frame parsing |
| CN105578524B (en) * | 2014-10-07 | 2019-01-25 | 国基电子（上海）有限公司 | Terminal device and method for processing packet |
| CN109600795B (en) * | 2017-09-30 | 2021-09-28 | 智邦科技股份有限公司 | Processing method of A-MSDU subframe and wireless network access device |
| CN108521407A (en) * | 2018-03-21 | 2018-09-11 | 国云科技股份有限公司 | A kind of secondary safety access control method based on cloudy platform |
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