CN103312450B - Data transmission method and access point - Google Patents
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- CN103312450B CN103312450B CN201210081177.XA CN201210081177A CN103312450B CN 103312450 B CN103312450 B CN 103312450B CN 201210081177 A CN201210081177 A CN 201210081177A CN 103312450 B CN103312450 B CN 103312450B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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Abstract
The embodiment of the present invention relates to data transmission method, access point.Data transmission method, comprising: identify that transmission instruction maps the target bits in TIM; By all or part of target bits negate; TIM compression is carried out to TIM, obtains the TIM after compression; The TIM after compression is sent to website.According to the embodiment of the present invention, utilize relaxing qubits or postpone the bit compression that bit assists TIM, further reduce the redundant bit in TIM, improve compression effectiveness, which thereby enhance the transmitting efficiency of TIM, reduce the expense of access point, improve the performance of network system.
Description
Technical field
The embodiment of the present invention relates to wireless communication field, and more specifically, relates to data transmission method, access point.
Background technology
In wireless fidelity network, access point can periodically broadcast beacon frame.Transmission instruction can be comprised in beacon frame and map (TrafficIndicationMap, be called for short TIM) part, initial TIM occurs with the form of bit mapping (bitmap), its each bit wherein represents a website, if in this beacon period, access point has downlink data will send to this website, then the bit that this website is corresponding is set to 1, otherwise is set to 0.Website receive beacon frame after it to detect the bit corresponding with self be 1 or 0, if be 1, energy-conservation poll frame can be sent and ask for downlink data to access point, if be 0, can resting state be entered, until waken up by next beacon.
At present, an access point can support nearly 6000 websites, and access point needs the instruction of the downlink data of each website to write in TIM part in a beacon, brings huge expense like this to access point.
Summary of the invention
The embodiment of the present invention provides a kind of data transmission method, can reduce the redundant bit in the bitmap of TIM, improves compression effectiveness.
On the one hand, provide a kind of data transmission method,
Described method comprises:
Identify that transmission instruction maps the target bits in TIM;
By all or part of target bits negate;
TIM compression is carried out to TIM, obtains the TIM after compression;
The TIM after compression is sent to website.
On the other hand, provide a kind of access point, described access point comprises:
Recognition unit, for identifying that transmission instruction maps the target bits in TIM;
Processing unit, for by all or part of target bits negate;
Compression unit, for carrying out TIM compression to TIM, obtains the TIM after compression;
Transmitting element, for sending the TIM after compression to website.
According to the embodiment of the present invention, utilize target bits, can overhead bit be called again, the bit compression of auxiliary TIM, further reduces the redundant bit in TIM, improves compression effectiveness, which thereby enhance the transmitting efficiency of TIM, reduce the expense of access point, improve the performance of network system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow diagram of the data transmission method according to the embodiment of the present invention;
Fig. 2 is the bitmap scalable compression method schematic diagram of the TIM adopted according to the data transmission method of the embodiment of the present invention;
Fig. 3 is the bitmap scalable compression method schematic diagram of the TIM adopted according to the data transmission method of the embodiment of the present invention;
Fig. 4 A is the bitmap scalable compression method schematic diagram of the TIM for the embodiment of the present invention;
Fig. 4 B is applied to scalable compression method schematic diagram according to the data transmission method of the embodiment of the present invention;
Fig. 5 is the schematic configuration diagram of the access point according to the 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.The method of the embodiment of the present invention and the application of installation of implementation method are in WLAN system.
Fig. 1 is the schematic flow diagram of the data transmission method 100 according to the embodiment of the present invention.As shown in Figure 1, method 100 comprises:
110: identify that transmission instruction maps the target bits in TIM;
120: by all or part of target bits negate;
130: TIM compression is carried out to TIM, obtain the TIM after compression;
140: send the TIM after compression to website.
In order to compress the amount of bits of the TIM sent in beacon frame, this purpose can be realized by some auxiliary bits.Here auxiliary bit is called target bits.According to the embodiment of the present invention, determine the target bits of two types: one is relaxing qubits, wherein said relaxing qubits is the bit corresponding to AID not having downlink data to need the bit corresponding to the association identification of the website sent (AssociationIdentity is called for short AID) in current beacon cycle and not yet carry out distributing.Need owing to not having downlink data to send, the bit corresponding with the AID of these websites generally can set to 0.By by some or all of for these relaxing qubits negate, namely put 1, can by the amount of bits in the TIM compress mode compression TIM preset.Such as, relaxing qubits here refers to the bit meeting one of following condition: AID is unallocated for website; The website that AID is corresponding is in resting state; The website that AID is corresponding is not scheduled in current beacon cycle and carries out downlink data reception; The website that AID is corresponding has notified that this website of access point AP does not need TIM to indicate.
Another kind postpones bit, and wherein said retardation ratio needs to send specially for there being downlink data at present, but carries out the bit corresponding to AID of the website sent after being scheduled for current beacon cycle.In general, downlink data is had to need bit corresponding to the AID of the website sent to be set to 1 at present.According to the embodiment of the present invention, by negate, these are postponed bit and sets to 0.Then, the amount of bits in TIM can be compressed by the compress mode preset.
The method of the embodiment of the present invention is set forth below in conjunction with concrete example.It should be noted that, below for example be only descriptive matter, the scope not for limiting the embodiment of the present invention.
Such as, TIM compression is being carried out to TIM, obtaining in the TIM process after compression, implements spatial scalable compression mode can be adopted.
Such as, a kind of method of implements spatial scalable compression is employed in the embodiment of the present invention to compress the TIM part in beacon frame.Set forth referring to Fig. 2.According to the capacity preset, the bitmap of TIM part is divided into three grades: the page (Page), block (Block), sub-block (Sub-Block).The bitmap that whole website is corresponding is divided into several Page, such as 4 Page, each Page comprises several Block, such as 32 Block, each Block comprises several Sub-block, such as 8 Sub-block, and each Sub-block comprises some bits, such as 8 bits, each bit indicates a website.So, the associated identifiers (AssociationIdentity is called for short AID) of each website can be identified by Page, and Block mark and Sub-Block identify and the bit mark of this AID in corresponding Sub-block carrys out index.Simple in order to describe below, there is the website of downlink data to represent with 1 in Sub-block, quote from 1 in Sub-block and then represent that the website that bit residing for 1 is corresponding with this has downlink data.
In this case, the TIM part in beacon frame comprises Page field, Block offset field (Blockoffset), block control (BlockCtrl) field, Block bit mapping (Blockbitmap) field and Sub-block bit mapping (Sub-blockbitmap) field.The Page that the instruction of Page field has the website of downlink data residing in bitmap, Blockoffset field indicates the side-play amount of Block in this Page residing for this website, the mode (lower mask body elaboration) that BlockCtrl field indicates this beacon transmissions to use, the instruction of Blockbitmap field has the mapping position in the Sub-block Block belonging to it residing for website of downlink data, and Sub-blockbitmaps field instruction which bit concrete is 1.Such as, in a kind of embody rule, Page field is 2 bits, and Blockoffset field is 5 bits, and BlockCtrl field is 3 bits, and Blockbitmap field is 1 byte, and Sub-blockbitmaps field volume-variable.Be described below in conjunction with object lesson shown in Fig. 2.
In figure 3, BlockCtrl field indicates the use of this beacon transmissions into normal mode (Normal), some bits in Blockbitmap field all websites got in the Sub-block of 0 its correspondence of expression all do not have downlink data to receive, if get 1, represent in the Sub-block of correspondence and have at least a website to have downlink data to need to send.When comprising n 1 in Blockbitmap field, its TIM part will attach n Sub-block, each bit in each Sub-block indicates the downlink data situation of a corresponding website, and value 0 represents do not have downlink data, and value 1 indicates downlink data.
In the above-mentioned methods, when the Sub-block exceeding half in certain Block is the time marquis of " 1 ", BlockCtrl can adopt normal mode to add negate pattern (" Normal+Inv ").As shown in Figure 3, first by inversion operation (inverse), " 1 " and " 0 " in this Block is exchanged, most Sub-block is made to be all complete " 0 ", then the situation of the later Sub-block that reverses is indicated with Blockbitmap, bit value in Blockbitmap be 0 expression reversion after Sub-block in be 0 entirely, value be 1 expression reversion after Sub-block in have one 1 at least.The situation after the reversion of the Sub-block being designated as 1 is placed in Blockbitmap after Blockbitmap field.
Composition graphs 4A, 2-6 and 8 Sub-block in certain Block is 1 entirely, after this Block negate, only remains in the 1st and 7 Sub-block and there is the bit that value is 1.Therefore, the BlockCtrl of TIM part is set to Normal+Inv, and Blockbitmap is set to 10000010, and Sub-blockbitmap is below 11010110,11100000, namely corresponding with the 1st and 7 Sub-block.After website receives the beacon frame comprising this TIM, carry out contrary operation, just can judge whether that this website has downlink data to need to receive.
The method of the embodiment of the present invention, under this application scenarios, specifically may be embodied as:
Determine that the sub-block having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and the block belonging to described first sub-block is first piece;
Identify the relaxing qubits in described first piece, described all or part of relaxing qubits is put 1;
First piece is compressed according to " Normal+Inv " pattern;
The sub-block comprising non-zero bit after determining described first piece of negate is the second sub-block;
Within a beacon frame, described second sub-block in described TIM is sent to described website.
It should be noted that, term " first piece " here, " the first sub-block ", " the second sub-block " only in order to describe the convenient difference carried out, do not represent any order or restriction.
According to foregoing, the AID that relaxing qubits correspondence mentioned here is idle, refers to the AID not also being assigned to any website; Although or this AID has been assigned with and gives certain website, this website has been in resting state due to needs power saving at present beacon delivery time; Although or this AID has been assigned with and gives certain website, this website has carried out downlink data reception because the reasons such as grouping are not scheduled in current beacon cycle.Such as, the website belonging to different group is dispatched in different beacon periods and communicates by access point.
According to the embodiment of the present invention, the sub-block having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and the block belonging to described first sub-block is first piece.Composition graphs 4B, relaxing qubits corresponding for idle AID is set to 1, bit value in first piece can be increased and all get the quantity of the Sub-block of 1, then by after these Sub-block negates, become the Sub-block that bit value all gets 0, therefore do not need to send in TIM, and after only needing to send negate, in first piece, comprise the Sub-block of non-zero bit, in the embodiment of the present invention, be called the 2nd Sub-block.Such as, the value in the 4th Sub-block in shown in Fig. 4 B first piece be 0 bit be relaxing qubits, by relaxing qubits negate, the bit in the 4th Sub-block can be allowed to be all 1.So, after first piece of negate, original the 4th Sub-block needing to send will be 0 and no longer send because of value after negate entirely.When idle AID is many, this method can greatly reduce the quantity of the Sub-block sent in TIM.In this case, the TIM part of beacon frame comprises BlockCtrl field, is used to indicate website and carries out negate to described first piece.After website receives beacon frame, first judge according to the Blockbitmap of TIM part, if the bit value that residing for AID corresponding to this website, sub-block is corresponding in Blockbitmap is 0, then represent that this website has downlink data to need to receive.If the bit value that Sub-block residing for the AID that this website is corresponding is corresponding in Blockbitmap is 1, then by after this Sub-block negate, judge whether the bit that the AID of this website is corresponding is 1, value is that this website of 1 expression has downlink data to need to receive.
According to the replacement scheme of the embodiment of the present invention, access point also by postponing the transmission of a part of website downlink data, can reach the effect compressed TIM.The bit corresponding to AID being postponed the website sending downlink data mentioned here is delay bit.Such as when major part have the website of downlink data all relatively concentrate but minority have downlink data website to be in the bit of relative distribution time, access point can select the transmission of the downlink data of the website of postponing this part dispersion, namely in the TIM part of current beacon frame, these are postponed bit to be set to " 0 " by " 1 ", thus reach the object of compression TIM.
The method of the embodiment of the present invention, under this application scenarios, specifically may be embodied as:
Determine the delay bit in described first sub-block, these postpone the present value of bit is 1;
By all or part of delay bit negate in described first sub-block, set to 0 by all or part of delay bit in the first sub-block;
Determine that described first sub-block comprising non-zero bit is the second sub-block;
Within a beacon frame, described second sub-block in described TIM is sent to described website.
Such as, in described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in described first sub-block of first threshold.
Such as, in the block belonging to described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in described piece of Second Threshold.
Such as, in the page belonging to described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in the described page of the 3rd threshold value.
In a kind of embody rule, if being only less than or equal to 1 bit value in a Sub-block is 1, then this bit can be set to 0, to postpone the transmission of the downlink data of the website corresponding with this bit, now described first threshold is 1.Those skilled in the art according to specific needs, can arrange different first thresholds, to realize the object of the compression TIM wished.
Furthermore, the quantity whole bit positions be less than or equal in the described Block of default Second Threshold that value in Block belonging to a described Sub-block can be the bit of 1 by access point are 0, then determine that the described Sub-block comprising non-zero bit is described second sub-block.That is, such as, with reference to upper example, 8 bits are comprised at each Sub-block, and each Block is when comprising 8 Sub-block, if only had in a Block, to be less than or equal to 4 bit values be 1, then the bit of whole Block all can be set to 0, to postpone the transmission of the downlink data of the whole websites belonging to this Block.Now, the Second Threshold preset is 4.Those skilled in the art according to specific needs, can arrange different Second Thresholds, to realize the object of the compression TIM wished.
Even, whole bit positions that the quantity that value in Page belonging to a described Sub-block is the bit of 1 by access point is less than or equal in the described Page of the 3rd default threshold value are 0, then determine that the described Sub-block comprising non-zero bit is described 2nd Sub-block.Such as, with reference to upper example, 8 bits are comprised at each Sub-block, and each Page comprises 32 Block, when each Block comprises 8 Sub-block, if only had in a Page, to be less than or equal to 32 bit values be 1, then the bit of whole Page all can be set to 0, to postpone the transmission of the downlink data of the whole websites belonging to this Page.Now, the Second Threshold preset is 32.Those skilled in the art according to specific needs, can arrange the 3rd different threshold values, to realize the object of the compression TIM wished.
According to the embodiment of the present invention, utilize relaxing qubits or postpone the bit compression that bit assists TIM, further reduce the redundant bit in TIM, improve compression effectiveness, which thereby enhance the transmitting efficiency of TIM, reduce the expense of access point, improve the performance of network system.
According to the embodiment of the present invention, also proposed the access point of the method for realizing the embodiment of the present invention.Fig. 5 is the schematic configuration diagram of the access point 500 according to the embodiment of the present invention.Access point 500 comprises:
Recognition unit 510, for identifying that transmission instruction maps the target bits in TIM;
Processing unit 520, for by all or part of target bits negate;
Compression unit 530, for carrying out TIM compression to TIM, obtains the TIM after compression;
Transmitting element 540, for sending the TIM after compression to website;
According to the embodiment of the present invention, described target bits is relaxing qubits, the bit of wherein said relaxing qubits corresponding to the AID that do not have downlink data need the bit and not yet carrying out corresponding to the association identification AID of the website sent to distribute in current beacon cycle.
According to the embodiment of the present invention, described relaxing qubits comprises the bit corresponding to AID of the website one of to meet the following conditions:
Described AID is unallocated for website;
The website that described AID is corresponding is in resting state;
The website that described AID is corresponding is not scheduled in current beacon cycle and carries out downlink data reception;
The website that described AID is corresponding has notified AP, and it does not need TIM to indicate.
According to the embodiment of the present invention, described target bits is for postponing bit, and wherein said retardation ratio needs to send specially for there being downlink data at present, but carries out the bit corresponding to AID of the website sent after being scheduled for current beacon cycle.
According to the embodiment of the present invention, compression unit 530 is carrying out TIM compression to TIM, obtains in the TIM process after compression, adopts implements spatial scalable compression mode.
According to the embodiment of the present invention, compression unit 530 is carrying out TIM compression to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and the block belonging to described first sub-block is first piece;
Described recognition unit 510 is for identifying the relaxing qubits in described first piece;
Described processing unit 520 is for by described relaxing qubits negate all or part of in described first piece;
Described compression unit 530 is the second sub-block for the sub-block comprising non-zero bit after determining described first piece of negate;
Described transmitting element 540 is for sending described second sub-block in described TIM to described website.
According to the embodiment of the present invention, compression unit 530 is carrying out TIM compression to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block
Described recognition unit 510 is for determining the delay bit in described first sub-block;
Described processing unit 520 is for by all or part of delay bit negate in described first sub-block;
Described compression unit 530 is for determining that described first sub-block comprising non-zero bit is the second sub-block;
Described transmitting element 540 is for sending described second sub-block in described TIM to described website.
According to the embodiment of the present invention, in described first sub-block, described processing unit 520 is for being less than or equal to the whole delay bit negate in described first sub-block of first threshold by described delay amount of bits;
According to the embodiment of the present invention, in the block belonging to described first sub-block, described processing unit 520 is for being less than or equal to the whole delay bit negate in described piece of Second Threshold by described delay amount of bits.
According to the embodiment of the present invention, in the page belonging to described first sub-block, described processing unit 520 is for being less than or equal to the whole delay bit negate in the described page of the 3rd threshold value by described delay amount of bits.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (16)
1. a data transmission method, is characterized in that, described method comprises:
Identify that transmission instruction maps the target bits in TIM;
By all or part of described target bits negate;
TIM compression is carried out to TIM, obtains the TIM after compression;
The TIM after described compression is sent to website;
Described target bits is relaxing qubits, the bit of wherein said relaxing qubits corresponding to the AID that do not have downlink data need the bit and not yet carrying out corresponding to the association identification AID of the website sent to distribute in current beacon cycle;
Described target bits is for postponing bit, and wherein said retardation ratio needs to send specially for there being downlink data at present, but carries out the bit corresponding to AID of the website sent after being scheduled for current beacon cycle.
2. the method for claim 1, is characterized in that, described relaxing qubits comprises the bit corresponding to AID of the website one of to meet the following conditions:
Described AID is unallocated for website;
The website that described AID is corresponding is in resting state;
The website that described AID is corresponding is not scheduled in current beacon cycle and carries out downlink data reception;
The website that described AID is corresponding has notified that this website of access point AP does not need TIM to indicate.
3. the method for claim 1, is characterized in that, describedly carries out TIM compression to TIM, obtains in the TIM process after compression, adopts implements spatial scalable compression mode.
4. the method for claim 1, it is characterized in that, described TIM compression is carried out to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, and the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and the block belonging to described first sub-block is first piece;
The described target bits identified in transmission instruction mapping TIM, comprising:
Identify the relaxing qubits in described first piece;
Described by all or part of described target bits negate, comprising:
By described relaxing qubits negate all or part of in described first piece;
Described TIM compression is carried out to TIM, obtains the TIM after compression, comprising:
The sub-block comprising non-zero bit after determining described first piece of negate is the second sub-block;
Describedly send the TIM after described compression to website, comprising:
Described second sub-block in described TIM is sent to described website.
5. the method for claim 1, it is characterized in that, described TIM compression is carried out to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, the whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, and the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, the described target bits identified in transmission instruction mapping TIM, comprising:
Determine the delay bit in described first sub-block;
Described by all or part of described target bits negate, comprising:
By all or part of delay bit negate in described first sub-block;
Described TIM compression is carried out to TIM, obtains the TIM after compression, comprising:
Determine that described first sub-block comprising non-zero bit is the second sub-block;
Describedly send the TIM after described compression to website, comprising:
Described second sub-block in described TIM is sent to described website.
6. method as claimed in claim 5, is characterized in that, described by all or part of delay bit negate in described first sub-block, comprising:
In described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in described first sub-block of first threshold.
7. method as claimed in claim 5, is characterized in that, described by all or part of delay bit negate in described first sub-block, comprising:
In the block belonging to described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in described piece of Second Threshold.
8. method as claimed in claim 5, is characterized in that, described by all or part of delay bit negate in described first sub-block, comprising:
In the page belonging to described first sub-block, described delay amount of bits is less than or equal to the whole delay bit negate in the described page of the 3rd threshold value.
9. an access point, is characterized in that, described access point comprises:
Recognition unit, for identifying that transmission instruction maps the target bits in TIM;
Processing unit, for by all or part of described target bits negate;
Compression unit, for carrying out TIM compression to TIM, obtains the TIM after compression;
Transmitting element, for sending the TIM after described compression to website;
Described target bits is relaxing qubits, the bit of wherein said relaxing qubits corresponding to the AID that do not have downlink data need the bit and not yet carrying out corresponding to the association identification AID of the website sent to distribute in current beacon cycle;
Described target bits is for postponing bit, and wherein said retardation ratio needs to send specially for there being downlink data at present, but carries out the bit corresponding to AID of the website sent after being scheduled for current beacon cycle.
10. access point as claimed in claim 9, is characterized in that, described relaxing qubits comprises the bit corresponding to AID of the website one of to meet the following conditions:
Described AID is unallocated for website;
The website that described AID is corresponding is in resting state;
The website that described AID is corresponding is not scheduled in current beacon cycle and carries out downlink data reception;
This website of website notice access point AP that described AID is corresponding does not need TIM to indicate.
11. access points as claimed in claim 9, it is characterized in that, described compression unit is carrying out TIM compression to TIM, obtains in the TIM process after compression, adopts implements spatial scalable compression mode.
12. access points as claimed in claim 9, it is characterized in that, described compression unit is carrying out TIM compression to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, and the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and the block belonging to described first sub-block is first piece;
Described recognition unit is for identifying the relaxing qubits in described first piece;
Described processing unit is used for described relaxing qubits negate all or part of in described first piece;
Described compression unit is the second sub-block for the sub-block comprising non-zero bit after determining described first piece of negate;
Described transmitting element is used for described second sub-block sent to described website in described TIM.
13. access points as claimed in claim 9, it is characterized in that, described compression unit is carrying out TIM compression to TIM, obtain in the TIM process after compression, adopt implements spatial scalable compression mode, whole bits wherein in TIM are divided into three grades according to amount of capacity: the page, block, sub-block, and the sub-block wherein having downlink data to need the AID of the website sent corresponding in current beacon cycle is the first sub-block, and described recognition unit is for determining the delay bit in described first sub-block;
Described processing unit is used for all or part of delay bit negate in described first sub-block;
Described compression unit is for determining that described first sub-block comprising non-zero bit is the second sub-block;
Described transmitting element is used for described second sub-block sent to described website in described TIM.
14. access points as claimed in claim 13, is characterized in that, in described first sub-block, described processing unit is used for the whole delay bit negate described delay amount of bits be less than or equal in described first sub-block of first threshold.
15. access points as claimed in claim 13, is characterized in that, in the block belonging to described first sub-block, described processing unit is used for the whole delay bit negate described delay amount of bits be less than or equal in described piece of Second Threshold.
16. access points as claimed in claim 13, is characterized in that, in the page belonging to described first sub-block, described processing unit is used for the whole delay bit negate described delay amount of bits be less than or equal in the described page of the 3rd threshold value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210081177.XA CN103312450B (en) | 2012-03-06 | 2012-03-23 | Data transmission method and access point |
| PCT/CN2013/072789 WO2013139241A1 (en) | 2012-03-23 | 2013-03-18 | Data transmission method and access point |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210056423 | 2012-03-06 | ||
| CN201210056423.6 | 2012-03-06 | ||
| CN201210081177.XA CN103312450B (en) | 2012-03-06 | 2012-03-23 | Data transmission method and access point |
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| Publication Number | Publication Date |
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| CN103312450A CN103312450A (en) | 2013-09-18 |
| CN103312450B true CN103312450B (en) | 2016-01-13 |
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| CN201210081177.XA Expired - Fee Related CN103312450B (en) | 2012-03-06 | 2012-03-23 | Data transmission method and access point |
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| WO (1) | WO2013139241A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006102613A3 (en) * | 2005-03-24 | 2007-10-25 | Riip Inc | Digital remote device management system for selectively operating a plurality of remote devices |
| CN101969605A (en) * | 2010-10-11 | 2011-02-09 | 杭州华三通信技术有限公司 | Method and equipment for determining DTIM interval by AP |
| US7991409B2 (en) * | 2007-03-05 | 2011-08-02 | Intel Corporation | Wake-on-WLAN for stationary wireless stations |
| CN102186229A (en) * | 2011-05-06 | 2011-09-14 | 新邮通信设备有限公司 | Independent basic service set (IBSS) system and power management method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070291681A1 (en) * | 2006-06-16 | 2007-12-20 | Nokia Corporation | Method and apparatus for providing information about each group address that has data waiting for delivery in node, point or terminal in a WLAN |
| US8693380B2 (en) * | 2007-02-27 | 2014-04-08 | Thomson Licensing | Method and apparatus for power management in WLAN |
| US20090016306A1 (en) * | 2007-07-12 | 2009-01-15 | Qi Wang | METHOD AND SYSTEM FOR AN EFFICIENT TIM ELEMENT SUPPORTING MULTIPLE BSSes IN A WIRELESS LAN |
| JP5174624B2 (en) * | 2008-11-10 | 2013-04-03 | 三菱電機株式会社 | Wireless communication system, wireless communication terminal, and wireless base station |
-
2012
- 2012-03-23 CN CN201210081177.XA patent/CN103312450B/en not_active Expired - Fee Related
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2013
- 2013-03-18 WO PCT/CN2013/072789 patent/WO2013139241A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006102613A3 (en) * | 2005-03-24 | 2007-10-25 | Riip Inc | Digital remote device management system for selectively operating a plurality of remote devices |
| US7991409B2 (en) * | 2007-03-05 | 2011-08-02 | Intel Corporation | Wake-on-WLAN for stationary wireless stations |
| CN101969605A (en) * | 2010-10-11 | 2011-02-09 | 杭州华三通信技术有限公司 | Method and equipment for determining DTIM interval by AP |
| CN102186229A (en) * | 2011-05-06 | 2011-09-14 | 新邮通信设备有限公司 | Independent basic service set (IBSS) system and power management method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103312450A (en) | 2013-09-18 |
| WO2013139241A1 (en) | 2013-09-26 |
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