CN105376859B

CN105376859B - A kind of information transferring method and device

Info

Publication number: CN105376859B
Application number: CN201410401375.9A
Authority: CN
Inventors: 杜振国
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-08-14
Filing date: 2014-08-14
Publication date: 2019-06-28
Anticipated expiration: 2034-08-14
Also published as: CN105376859A

Abstract

The invention discloses a kind of information transferring method and devices, comprising: generates downlink transmission frame；Wherein, it include at least one first signal SIG1 field in the physical header of the downlink transmission frame, and second signal SIG2 field corresponding with each SIG1 field respectively, it include the location information of SIG2 field corresponding with the SIG1 field in the SIG1 field, and comprising the resource allocation information with the subchannel where the corresponding SIG1 field for the site STA of preferred channel in the SIG2 field, so that each STA can obtain resource allocation information and listening to the preferred channel of itself；Send the downlink transmission frame.With this solution, efficiency of transmission can be improved and be easily disturbed the problem of making resource allocation fail to avoid the downlink transmission frame for carrying resource allocation information.

Description

A kind of information transferring method and device

Technical field

The present invention relates to field of communication technology more particularly to a kind of information transferring methods and device.

Background technique

With the evolution of WLAN (Wireless Local Area Network, WLAN) standard, current is electrical With Electronic Engineering Association (Institute of Electrical and Electronics Engineers, IEEE) 802.11 working groups have started the research of next-generation Wireless Fidelity (Wireless Fidelity, Wi-Fi) standard and have formulated work Make.The referred to as efficient WLAN (High Efficiency WLAN, HEW) of next-generation Wi-Fi standard, item designation 802.11ax, target are to promote power system capacity to 10Gbps or more, pay special attention to Working level Wi-Fi (Carrier-grade ) and the scene of high density Wi-Fi Wi-Fi.

So-called Working level Wi-Fi refers to the case where Wi-Fi network is disposed by operator or enterprise.The former major deployments in Outdoor, to realize that hot spot region covers；The latter's major deployments are in enterprises.So-called high density Wi-Fi includes two kinds of situations, i.e., High density access point (Access Point, AP) and high density website (Station, STA).The former refers to AP within a certain area Largely exist, usually disposed by operator or enterprise, also includes the case where that residential subscribers individual disposes certainly；The latter be then Hot spot region, due to crowded, the very high density of Wi-Fi equipment distribution.And in a practical situation, it may be possible to which AP and STA are same When high density be distributed.

For the scene of this high density Wi-Fi, the contention access mechanism of traditional Wi-Fi cannot be very due to its poor efficiency Good work, there is an urgent need to introduce new access mechanism.A kind of possible scheme is using the orthogonal frequency division multiplexing based on scheduling (Orthogonal Frequency Division Multiple Access, OFDMA) mechanism, i.e. AP dispatch multiple STA simultaneously Upstream or downstream are transmitted on different subchannels.One key of this scheme is the resource for how making STA know that it is distributed, At present there are two types of solution: a kind of more traditional solution is that AP broadcasts a Resource Allocation Frame, carry wherein with Resource allocation information in a period of time afterwards；Another scheme is that AP does not send special Resource Allocation Frame, but in downlink frame Physical header in carry resource allocation information, this be equivalent to by Resource Allocation Frame and downlink transmission frame aggregation carries out in a frame It sends.Obviously, second scheme is more efficient and our focus.

Does is but the problem of second scheme, how resource allocation information is carried in physical header? it is carried in physical header The field of information is signal (Signal, SIG) field, is generally made of multiple portions, such as SIG1/SIG2 or SIG-A/SIG- B etc..As shown in Figure 1, for the physical layer protocol data unit in 802.11ac in the prior art when 80MHz transmission (Physical Layer Convergence Procedure Protocol Data Unit, PPDU) structural schematic diagram, wherein Very high-throughput SIG-A (Very High Throughput, VHT-SIG-A) is replicated in each 20MHz subchannel, using most Low transmission rate is sent.Why copy transmissions, be because AP can select 20MHz subchannel to make in existing Wi-Fi network For its main channel (Primary Channel), STA listens to VHT-SIG-A in this main channel first, and then basis wherein indicates Bandwidth information determine and listen to the VHT-SIG-B of much bandwidth.Therefore, the VHT-SIG-A actually only in AP main channel is Effectively, other duplications are only used for filling channel.

The frame structure in the method Fig. 1 for carrying resource allocation information using physical header put forward at present is similar, such as Fig. 2 It is shown.Wherein, old leading (the Legacy Preamble, L-pre) in Fig. 2 includes old Short Training domain (Legacy Short Training field, L-STF), old long training domain (Legacy Long Training field, L-LTF) and old letter Number domain (Legacy Signal, L-SIG).HEW-SIG1 (can also be referred to as H-SIG1) in Fig. 2 believes in each 20MHz Copy transmissions on road, HEW-SIG2 (can also be referred to as H-SIG2) is middle to carry resource allocation information, but specifically how to carry simultaneously Do not illustrate.Since without training sequence, a kind of most possible carrying mode is full bandwidth between HEW-SIG1 and HEW-SIG2 It carries, i.e. STA need to receive and solve the HEW-SIG2 in whole bandwidth, could obtain the resource allocation information needed for oneself.But It is that there are following disadvantages for this scheme:

1, in the scene of high density Wi-Fi, very likely there is the transmission from other AP or STA on fractional bandwidth, May thus HEW-SIG2 be received to STA and generate interference, prevent STA is from correctly obtaining resource allocation information.

2, due to the position STA difference, ambient enviroment is also different, and AP is difficult to find one all to be compared for all STA Good channel is especially especially true under highly dense environment as main channel.This will lead to part STA and cannot be properly received HEW-SIG1, subsequent all scheduling to part STA also all will be invalid.

3, in the scene of high density Wi-Fi, it is even higher that system bandwidth is likely to be breached 320MHz, therefore can adjust every time The STA of degree may be very more, therefore the HEW-SIG2 for carrying the resource allocation information of STA can be grown very much in the time domain, thus Cause the efficiency of transmission of HEW-SIG2 very low.

Summary of the invention

The embodiment of the present invention provides a kind of information transferring method and device, can improve efficiency of transmission and to avoid taking Downlink transmission frame with resource allocation information is easily disturbed thus the problem of making resource allocation fail.

In a first aspect, providing a kind of information transferring method, comprising:

Generate downlink transmission frame；It wherein, include at least one first signal SIG1 in the physical header of the downlink transmission frame Field, and second signal SIG2 field corresponding with each SIG1 field respectively, in the SIG1 field comprising with it is described The location information of the corresponding SIG2 field of SIG1 field, and comprising with the son where corresponding SIG1 field in the SIG2 field Channel is the resource allocation information of the site STA of preferred channel, so that each STA can be and listening to the preferred channel of itself Obtain resource allocation information；

Send the downlink transmission frame.

With reference to first aspect, in the first possible implementation, also include in the SIG1 field:

The modulation coding scheme MCS of SIG2 field corresponding with the SIG1 field.

With reference to first aspect or the first possible implementation of first aspect, in second of possible implementation In, in the SIG1 field further include:

The network identity of the sender of the downlink transmission frame or device identification.

With reference to first aspect, second of possible reality of the possible implementation of the first of first aspect or first aspect Existing mode also includes in the SIG1 field in the third possible implementation:

The location information of other SIG2 fields in addition to SIG2 field corresponding with the SIG1 field；Wherein, described Other SIG2 fields meet: it carries with the resource allocation information for the STA that the subchannel where the SIG1 field is alternative channel, So that each STA when the preferred channel for listening to itself is interfered, can be provided and listening to the alternative channel of itself Information is distributed in source.

The third possible implementation with reference to first aspect, in the fourth possible implementation, the SIG1 Also include in field:

The MCS of other SIG2 fields.

The 4th kind of possible implementation of the third possible implementation or first aspect with reference to first aspect, In 5th kind of possible implementation, the preferred channel and alternative channel of each STA determines as follows:

It is allocated in advance by the sender of the downlink transmission frame；Or

It is determined by STA according to the channel quality of every sub-channels of measurement, and is reported to the hair of the downlink transmission frame The side of sending.

With reference to first aspect, the possible implementation of the first of first aspect, first aspect second of possible reality Now the 4th kind of possible implementation or first party of mode, the third possible implementation of first aspect, first aspect The 5th kind of possible implementation in face, in a sixth possible implementation, the location information includes:

Frequency domain position information and bandwidth information.

With reference to first aspect, the possible implementation of the first of first aspect, first aspect second of possible reality Now the 4th kind of possible implementation, first aspect of mode, the third possible implementation of first aspect, first aspect The 5th kind of possible implementation or first aspect the 6th kind of possible implementation, in the 7th kind of possible implementation In,

The location information is indicated according to any one following mode:

Resource bitmap block, tuple and index.

With reference to first aspect, the possible implementation of the first of first aspect, first aspect second of possible reality Now the 4th kind of possible implementation, first aspect of mode, the third possible implementation of first aspect, first aspect The 5th kind of possible implementation, first aspect the 6th kind of possible implementation or the 7th kind of first aspect it is possible Implementation, in the 8th kind of possible implementation, each SIG1 field does not overlap on frequency domain, phase mutual respect in the time domain It is folded.

With reference to first aspect, the possible implementation of the first of first aspect, first aspect second of possible reality Now the 4th kind of possible implementation, first aspect of mode, the third possible implementation of first aspect, first aspect The 5th kind of possible implementation, the 6th kind of possible implementation of first aspect, the 7th kind of first aspect it is possible 8th kind of possible implementation of implementation or first aspect, in the 9th kind of possible implementation, each SIG2 word Section is not overlapped in frequency domain or spatial domain.

Second aspect provides a kind of information carrying means, comprising:

Downlink transmission frame generation unit, for generating downlink transmission frame；Wherein, it is wrapped in the physical header of the downlink transmission frame Containing at least one the first signal SIG1 field, and second signal SIG2 field corresponding with each SIG1 field respectively, it is described It include the location information of SIG2 field corresponding with the SIG1 field in SIG1 field, and comprising with right in the SIG2 field Subchannel where the SIG1 field answered is the resource allocation information of the site STA of preferred channel, so that each STA can pass through It listens to the preferred channel of itself and obtains resource allocation information；

Downlink transmission frame transmission unit, for sending the downlink transmission frame.

In conjunction with second aspect, in the first possible implementation, also include in the SIG1 field:

In conjunction with the possible implementation of the first of second aspect or second aspect, in second of possible implementation In, in the SIG1 field further include:

In conjunction with the first possible implementation of second aspect, second aspect or second of possible reality of second aspect Existing mode also includes in the SIG1 field in the third possible implementation:

In conjunction with the third possible implementation of second aspect, in the fourth possible implementation, the SIG1 Also include in field:

The MCS of other SIG2 fields.

In conjunction with the third possible implementation of second aspect or the 4th kind of possible implementation of second aspect, In 5th kind of possible implementation, the preferred channel and alternative channel of each STA determines as follows:

In conjunction with the first possible implementation of second aspect, second aspect, second of possible reality of second aspect Now the 4th kind of possible implementation or second party of mode, the third possible implementation of second aspect, second aspect The 5th kind of possible implementation in face, in a sixth possible implementation, the location information includes:

Frequency domain position information and bandwidth information.

In conjunction with the first possible implementation of second aspect, second aspect, second of possible reality of second aspect Now the 4th kind of possible implementation, second aspect of mode, the third possible implementation of second aspect, second aspect The 5th kind of possible implementation or second aspect the 6th kind of possible implementation, in the 7th kind of possible implementation In, the location information is indicated according to any one following mode:

Resource bitmap block, tuple and index.

In conjunction with the first possible implementation of second aspect, second aspect, second of possible reality of second aspect Now the 4th kind of possible implementation, second aspect of mode, the third possible implementation of second aspect, second aspect The 5th kind of possible implementation, second aspect the 6th kind of possible implementation or the 7th kind of second aspect it is possible In implementation, in the 8th kind of possible implementation, each SIG1 field does not overlap on frequency domain, in the time domain mutually Overlapping.

In conjunction with the first possible implementation of second aspect, second aspect, second of possible reality of second aspect Now the 4th kind of possible implementation, second aspect of mode, the third possible implementation of second aspect, second aspect The 5th kind of possible implementation, the 6th kind of possible implementation of second aspect, the 7th kind of second aspect it is possible In implementation or the 8th kind of possible implementation of second aspect, in the 9th kind of possible implementation, each SIG2 Field is not overlapped in frequency domain or spatial domain.

The third aspect provides a kind of information transferring method, comprising:

The first signal SIG1 field in downlink transmission frame is listened on predetermined preferred channel；Wherein, under described It include at least one SIG1 field, and second signal corresponding with each SIG1 field respectively in the physical header of row transmission frame SIG2 field, includes the location information of SIG2 field corresponding with the SIG1 field in the SIG1 field, and the SIG2 Comprising with the resource allocation information for the site STA that the subchannel where corresponding SIG1 field is preferred channel in field；

From the SIG1 field listened to, the location information of corresponding SIG2 field is obtained；

In SIG2 field indicated by location information from acquisition, resource allocation information is obtained.

Fourth aspect provides a kind of information carrying means, comprising:

Unit is listened to, for listening to the first signal SIG1 word in downlink transmission frame on predetermined preferred channel Section；Wherein, in the physical header of the downlink transmission frame include at least one SIG1 field, and respectively with each SIG1 field pair The second signal SIG2 field answered, the position in the SIG1 field comprising SIG2 field corresponding with the SIG1 field are believed Breath, and comprising with the resource for the site STA that the subchannel where corresponding SIG1 field is preferred channel in the SIG2 field Distribute information；

Location information acquiring unit, for obtaining corresponding SIG2 field from listening in the SIG1 field that unit listens to Location information；

Resource allocation information acquiring unit, SIG2 indicated by the location information for being obtained from location information acquiring unit In field, resource allocation information is obtained

The embodiment of the present invention has the beneficial effect that:

The embodiment of the present invention is compared with prior art, on the one hand, the SIG1 field sent on each sub-channels is not Duplication is sent, but carries the location information of itself corresponding SIG2 field respectively, and is carried in SIG2 field with correspondence SIG1 field where subchannel be preferred channel STA resource allocation information so that each STA need to only listen to from The preferred channel of body can obtain resource allocation information, without by other interference；On the other hand, in each SIG2 field Middle carrying is the resource allocation information of the STA of preferred channel with subchannel where its correspondence SIG1 field, rather than all STA Resource allocation information and then improved so that each SIG2 field for carrying resource allocation information in the time domain will not be too long Information transfer efficiency.

Detailed description of the invention

Fig. 1 is the PPDU structural schematic diagram in 802.11ac in the prior art when 80MHz transmission；

Fig. 2 is the schematic diagram for carrying resource allocation information using physical header in the prior art；

Fig. 3 is a kind of implementation flow chart of information transferring method provided in an embodiment of the present invention；

Fig. 4 is the first frame structure schematic diagram provided in an embodiment of the present invention；

Fig. 5 is second of frame structure schematic diagram provided in an embodiment of the present invention；

Fig. 6 is second of frame structure schematic diagram provided in an embodiment of the present invention；

Fig. 7 is that the embodiment of the invention provides a kind of implementation flow charts of information transferring method；

Fig. 8 is a kind of structural schematic diagram of information carrying means provided in an embodiment of the present invention；

Fig. 9 is a kind of hardware structural diagram of information carrying means provided in an embodiment of the present invention；

Figure 10 is a kind of structural schematic diagram of information carrying means provided in an embodiment of the present invention；

Figure 11 is a kind of hardware structural diagram of information carrying means provided in an embodiment of the present invention.

Specific embodiment

The embodiment of the present invention in view of the above problems, proposes a kind of information transmission scheme.

There are some methods for carrying resource allocation information using physical header at present:

1, enter in network or association process in STA, AP is that each STA distributes a logic main channel, different STA's Logic main channel may be different, and AP can redistribute logic main channel by management frame.Logic of each STA at oneself The resource allocation information that AP is sent is monitored in main channel.Specifically, HEW-SIG1 replicates hair still in each 20MHz subchannel It send, and is located at HEW-SIG2 for the resource allocation information of each STA, bandwidth is the width of logic main channel.This method The problem of be: if there is 8 use same subchannel as logic main channel in 10 STA of certain scheduling, in logic letter In the case that road width is fixed, the HEW-SIG2 that will lead to bearing resource distribution information is very long in time domain.

2, AP sends an OFDMA group management frame, notifies which sub- letter each STA should monitor in subsequent following period of time Road, to obtain resource allocation information.But this method at present be only a general concept, specifically how to carry into One step detailed design.

Based on above-mentioned existing method existing defects, the embodiment of the invention provides a kind of information transmission schemes.The technical side In case, on the one hand, the SIG1 field sent on each sub-channels is not that duplication is sent, but it is corresponding to carry itself respectively The location information of SIG2 field, and carrying in SIG2 field with the subchannel where corresponding SIG1 field is preferred channel STA resource allocation information so that the preferred channel that each STA need to only listen to itself can obtain resource allocation letter Breath, without by other interference；On the other hand, it is only carried in each SIG2 field with the son where its correspondence SIG1 field Channel is the resource allocation information of the STA of preferred channel, rather than the resource allocation information of all STA, so that carrying resource point Each SIG2 field with information in the time domain will not be too long, and then improves information transfer efficiency.

Below in conjunction with Figure of description to the main realization principle of technical solution of the embodiment of the present invention, specific embodiment and Its beneficial effect corresponding to reach is explained in detail.

As shown in figure 3, the main realization principle of the embodiment of the present invention is as follows:

Step 31, downlink transmission frame is generated；It wherein, include at least one SIG1 field in the physical header of downlink transmission frame, And SIG2 field corresponding with SIG1 field respectively, it include the position of SIG2 field corresponding with SIG1 field in SIG1 field Information, and comprising with the resource point for the site STA that the subchannel where corresponding SIG1 field is preferred channel in SIG2 field With information, so that each STA can obtain resource allocation information and listening to the preferred channel of itself.

Step 32, the downlink transmission frame is sent.

Wherein, the preferred channel of each STA can be that network side is pre-assigned, be also possible to STA according to the every of measurement The channel quality of sub-channels and determine, and be reported to network side.

Specifically, can be, but not limited to distribute preferred channel as follows:

STA reports the metrical information of the channel quality to every sub-channels, and then network side is every according to the metrical information The best subchannel of a STA distribution channel quality is preferred channel.

In the embodiment of the present invention, multiple SIG1 fields can correspond to the same SIG2 field, and each SIG1 field exists It is not overlapped on frequency domain, overlapped in the time domain and each SIG2 field is not overlapped in frequency domain or spatial domain.

Optionally, can also include in SIG1 field:

SIG2 field corresponding with SIG1 field modulation coding scheme (Modulation and Coding Scheme, MCS)。

Optionally, can also include: in SIG1 field

The network identity of the sender of downlink transmission frame or device identification, such as the basic service set identification (Basic of AP Service Set Identifier, BSSID), it can be truncated BSSID under normal circumstances, for example the inverse of BSSID is several Position.

The case where there may be multiple AP in the scene of high density Wi-Fi, if STA is in the preferred channel sense of itself To SIG1 in include network identity be not itself associated AP, then It is not necessary to go to execute subsequent operation, maximum limit again The waste of degree avoided to STA resource.

Furthermore, it is contemplated that defeated is sudden, the preferred channel of STA is not always best.If preferred channel quilt suddenly Interference, STA will cannot be properly received SIG1 field on the preferred channel of itself.For this problem, in the embodiment of the present invention The scheme for proposing redundancy backup can also include in SIG1 field:

The location information of other SIG2 fields in addition to SIG2 field corresponding with SIG1 field, wherein other SIG2 words Section needs to meet: carrying with the resource allocation information for the STA that the subchannel where SIG1 field is alternative channel, so that each STA can obtain resource allocation information and listening to the alternative channel of itself when the preferred channel of itself is interfered；

Optionally, can also include in SIG1 field:

The MCS of other SIG2 fields.

Wherein, the alternative channel of each STA is also possible to that network side is pre-assigned, is also possible to STA according to measurement The channel quality of every sub-channels and determine, and be reported to network side.

It should be strongly noted that " location information " mentioned above can be expressed with the mode directly indicated, such as Directly indicate the frequency domain position (initial frequency mark/centre frequency mark/deviant) and bandwidth of SIG2 field；It can also be with hidden The mode of formula is expressed, such as resource bitmap block (bitmap), tuple (tuple), index (index) etc..It is false by taking bitmap as an example If total bandwidth is 80MHz, minimum child resource block size is 10MHz, when the correspondence SIG2 field of some SIG1 field instruction is located at When highest 20MHz, corresponding bitmap is [1 100000 0]；It is corresponding if SIG2 field is located at intermediate 40MHz Bitmap is [0 011110 0].In fact, the use of implicit expression being a kind of more preferably implementation, can subtract Few field length is to save expense.

In the embodiment of the present invention, on the one hand, the SIG1 field sent on each sub-channels is not duplication transmission, but The location information of itself corresponding SIG2 field is carried respectively, and is carried where corresponding SIG1 field in SIG2 field Subchannel be preferred channel STA resource allocation information so that each STA need to only listen to the preferred channel of itself just Resource allocation information can be obtained, without by other interference；On the other hand, it is right with its only to carry in each SIG2 field Subchannel where answering SIG1 field is the resource allocation information of the STA of preferred channel, rather than the resource allocation of all STA is believed Breath so that each SIG2 field for carrying resource allocation information in the time domain will not be too long, and then improves information transfer efficiency.

The location information that corresponding SIG2 field why is carried in SIG1 field, without directly carrying for STA's Resource allocation information is because HEW is a broadband system, and it is even higher that system bandwidth is likely to be breached 320MHz, therefore every time Schedulable many STA carry out OFDMA or multi-user's multiple-input and multiple-output (Multiple User Multiple-Input Multiple-Output, MU MIMO) transmission, therefore resource allocation information may be very long.And SIG1 field can only use it is minimum MCS is sent, therefore, can be relatively low using the efficiency of transmission that SIG1 field carries resource allocation information.

Why the location information of all SIG2 fields is not carried in SIG1 field, then by SIG1 field each Copy transmissions in subchannel, if being because 320MHz may include 16 son letters with 20MHz for the minimum bandwidth of SIG1 field The location information of the corresponding SIG2 field in road, so multi sub-channel is added together can be very long.Therefore, use is sent with minimum MCS SIG1 field copy transmissions be unfavorable for improved efficiency.

The location information that corresponding SIG2 field why is carried in SIG1 field is not to use SIG2 field directly Frequency domain bandwidth identical with SIG1 field, be because have in STA scheduled in certain the preferred channel of many STA it is identical when, Network side can indicate wider SIG2 field frequency domain bandwidth in the SIG1 field of the subchannel, so that SIG2 field is in time domain On be unlikely to too long, to improve efficiency of transmission.

To sum up, the embodiment of the present invention makes the length of SIG1 field as short as possible, and occupies the resource allocation compared with multiple-length Information is then included in the SIG2 field using higher MCS, to improve efficiency of transmission.

Based on above-mentioned design, the embodiment of the invention provides the structures of two kinds of specific downlink transmission frames.

Frame structure one:

As shown in figure 4, at least a part of in the frequency band that downlink data transmission uses is that corresponding SIG2 field is not used. Therefore, it is necessary to new training domain (H-STF/LTF) is added between SIG2 field and down link data (DL Data).Training Comprising a H-STF and at least one H-LTF in domain, the number of H-LTF is equal to using the sum of the STA empty time stream number of MIMO N.

SIG1 field, SIG2 field use single-stream transmission, and the part Data can be used using MIMO Multiple stream transmission, and single-stream transmission is used using OFDMA.Certainly, the part Data can be divided into two from bandwidth Point, a part uses MU-MIMO, and another part uses OFDMA.Its extreme situation is that whole bandwidth uses OFDMA or MU- MIMO.In fact, whole bandwidth only uses OFDMA or MIMO in primary transmission, it is a kind of simpler scheme, is conducive to The realization of transmitter and receiver.

The content that several SIG fields specifically include in frame are as follows:

1, H-SIG1 field: minimum MCS is used

A, the location information of corresponding SIG2 field

B, MCS used in corresponding SIG2 field is indicated

C, transmission bandwidth

D, network identity or device identification: such as BSSID, truncated BSSID, Color

2, H-SIG2 field: the MCS indicated in H-SIG1 field is used

A, scheduled STA mark or STA group mark

B, uplink and/or downlink resource distribute information

C, MCS used in H-SIG3 field is transmitted

D, DL Data configured transmission: as MCS, length, empty time stream number (Nsts), operation mode indicate (SU MIMO/MU MIMO/OFDMA/ ...) etc.

E, UL Data configured transmission: empty time stream number (Nsts), operation mode indicate (SU MIMO/MU MIMO/ OFDMA/ ...) etc.

3, H-SIG3 field

A, UL data transmission parameters: such as MCS, length, Space-Time Block Coding (Space-Time Block Coding, STBC) Deng.

In addition, it is necessary to illustrate, the H-STF/LTF of uplink part is also possible to full bandwidth distribution in Fig. 4.

Frame structure two:

As shown in figure 5, the frequency band that downlink data transmission uses is no more than the frequency band of SIG2 field in frequency domain.Such case Under, data transmit the reusable channel estimation results obtained of the training domain according to SIG2 field.Since MU MIMO may be used Transmission, H-SIG2 field may be multiple stream transmission, and each STA need to only solve oneself corresponding stream at this time, obtain the H- of oneself SIG2 field, wherein including the resource allocation information for oneself

1, H-SIG1 field

A, the location information of corresponding SIG2 field

B, MCS used in corresponding SIG2 field is indicated

C, empty time stream number (Nsts) and operation mode instruction (SU MIMO/MU MIMO/OFDMA/ ...)

D, Group ID may be implied in operation mode.For example, 0 indicates OFDMA, 63 indicate that SUMIMO, 1-62 indicate MU MIMO

E, transmission bandwidth

F, network identity or device identification: such as BSSID, truncated BSSID, Color

2, H-SIG2 field

A, scheduled STA mark

B, uplink and/or downlink resource distribute information

C, MCS used in H-SIG3 field is transmitted

D, DL Data configured transmission: such as MCS, length

3, H-SIG3 field

A, UL data transmission parameters: such as MCS, length, STBC

When multiple STA downlinks of AP scheduling are used only OFMDA and MIMO are not used, the frame structure in Fig. 5 be reduced to as Shown in Fig. 6.It wherein, only include a H-LFT in the H-SIG/LTF before H-SIG2 field, and H-SIG2 field is also single It spreads defeated.

It should be strongly noted that " location information of corresponding SIG2 field " so-called in above two frame structure can be with directly The mode of instruction is connect to express, for example, directly indicate SIG2 field frequency domain position (initial frequency mark/centre frequency mark/ Deviant) and bandwidth；It can also be expressed with implicit mode, such as resource bitmap block (bitmap), tuple (tuple), rope Draw (index) etc..By taking bitmap as an example, it is assumed that total bandwidth 80MHz, minimum child resource block size is 10MHz, when some SIG1 word When the correspondence SIG2 field of section instruction is located at highest 20MHz, corresponding bitmap is [1 100000 0]；If SIG2 word Section is located at intermediate 40MHz, and corresponding bitmap is [0 011110 0].In fact, using implicit expression be it is a kind of more Excellent implementation can reduce field length to save expense.

In comparison, frame structure one can be more flexible for the scheduling of DL data, but has more a H-STF+H-LTF The expense of training domain；Frame structure two limits the bandwidth that data dispatch bandwidth is no more than SIG2 field, while also making SIG1 field The content that need to be carried is more, also more complicated in processing, but reduces the expense of H-STF+H-LTF training domain, and for DL The case where MU MIMO, SIG2 field in the time domain can be shorter.Therefore, two schemes respectively have advantage and disadvantage.In comparison, frame structure Two efficiency of transmission is higher, therefore recommending this frame structure is preferred embodiment.

Based on the information transferring method of above-mentioned network side, the information of terminal side (such as STA) corresponding with network side is transmitted Process is as shown in fig. 7, comprises following step:

Step 71, the first signal SIG1 field in downlink transmission frame is listened on predetermined preferred channel；Wherein, In the physical header of the downlink transmission frame include at least one SIG1 field, and respectively with each SIG1 field corresponding second Signal SIG2 field includes the location information of SIG2 field corresponding with the SIG1 field in the SIG1 field, and described Comprising with the resource allocation information for the site STA that the subchannel where corresponding SIG1 field is preferred channel in SIG2 field；

Wherein, the method for determination of preferred channel is same with the above-mentioned embodiment, and details are not described herein.

Step 72, from the SIG1 field listened to, the location information of corresponding SIG2 field is obtained；

Step 73, in SIG2 field indicated by the location information from acquisition, resource allocation information is obtained.

The structure of downlink transmission frame in the embodiment of the present invention is same with the above-mentioned embodiment, and details are not described herein.

Based on the information transferring method of above-mentioned network side, the embodiment of the invention also provides a kind of information carrying means, such as Shown in Fig. 8, for the structural schematic diagram of the device, comprising:

Downlink transmission frame generation unit 81, for generating downlink transmission frame；Wherein, in the physical header of the downlink transmission frame Comprising at least one the first signal SIG1 field, and second signal SIG2 field corresponding with the SIG1 field respectively, institute State in SIG1 field include SIG2 field corresponding with the SIG1 field location information, and in the SIG2 field comprising with Subchannel where corresponding SIG1 field is the resource allocation information of the site STA of preferred channel, so that each STA can lead to It crosses the preferred channel for listening to itself and obtains resource allocation information；

Downlink transmission frame transmission unit 82, for sending the downlink transmission frame.

Optionally, also include in the SIG1 field:

Optionally, in the SIG1 field further include:

Optionally, also include in the SIG1 field:

The frequency domain position information and bandwidth of other SIG2 fields in addition to SIG2 field corresponding with the SIG1 field Information；Wherein, other SIG2 fields meet: carrying the STA with the subchannel where the SIG1 field for alternative channel Resource allocation information can be by listening to the standby of itself so that each STA is when the preferred channel for listening to itself is interfered It selects channel and obtains resource allocation information.

Optionally, also include in the SIG1 field:

The MCS of other SIG2 fields.

Optionally, the preferred channel of each STA and alternative channel determine as follows:

Optionally, the location information includes: frequency domain position information and bandwidth information.

Optionally, the location information can be indicated according to any one following mode:

Resource bitmap block, tuple and index.

Optionally, each SIG1 field does not overlap on frequency domain, overlapped in the time domain.

Optionally, each SIG2 field is not overlapped in frequency domain or spatial domain.

Correspondingly, the embodiment of the invention also provides a kind of information carrying means, as shown in figure 9, being the hardware of the device Structural schematic diagram, comprising: processor 91, memory 92 and communication bus 93, wherein processor 91, memory 92 with communication Bus 93 connects.

Processor 91 can be a general central processor (CPU), microprocessor, application-specific integrated circuit (application-specific integrated circuit, ASIC), or it is one or more for controlling the present invention program The integrated circuit that program executes.

Wherein, the communication bus 93 may include an access, and information is transmitted between said modules.

The memory 92 is connect with the processor 91, and stores the program code that the processor 91 executes；

The processor 91 is connect, for generating downlink transmission frame with the memory 92；Wherein, the downlink transfer It include at least one first signal SIG1 field, and SIG2 field corresponding with the SIG1 field, institute in the physical header of frame State in SIG1 field include SIG2 field corresponding with the SIG1 field location information, and in the SIG2 field comprising with Subchannel where corresponding SIG1 field is the resource allocation information of the site STA of preferred channel, so that each STA can lead to It crosses the preferred channel for listening to itself and obtains resource allocation information；Send the downlink transmission frame.

Optionally, also include in the SIG1 field:

Optionally, in the SIG1 field further include:

Optionally, also include in the SIG1 field:

The location information of other SIG2 fields in addition to SIG2 field corresponding with the SIG1 field；Wherein, described Other SIG2 fields meet: carrying with the resource allocation letter for the STA that the subchannel where corresponding SIG1 field is alternative channel Breath, so that each STA when the preferred channel for listening to itself receives interference, can be obtained and listening to the alternative channel of itself Resource allocation information.

Resource bitmap block, tuple and index

Based on the information transferring method of above-mentioned terminal side, the embodiment of the invention also provides a kind of information carrying means, such as Shown in Figure 10, for the structural schematic diagram of the device, comprising:

Unit 101 is listened to, for listening to the first signal SIG1 in downlink transmission frame on predetermined preferred channel Field；Wherein, in the physical header of the downlink transmission frame include at least one SIG1 field, and respectively with each SIG1 field Corresponding second signal SIG2 field, the position in the SIG1 field comprising SIG2 field corresponding with the SIG1 field are believed Breath, and comprising with the resource for the site STA that the subchannel where corresponding SIG1 field is preferred channel in the SIG2 field Distribute information；

Location information acquiring unit 102, for obtaining corresponding from listening in the SIG1 field that unit 101 listens to The location information of SIG2 field；

Resource allocation information acquiring unit 103, indicated by the location information for being obtained from location information acquiring unit 102 SIG2 field in, obtain resource allocation information.

Correspondingly, the embodiment of the invention also provides a kind of information carrying means, as shown in figure 11, for the hardware of the device Structural schematic diagram, comprising: processor 111, memory 112 and communication bus 113, wherein processor 111, memory 112 are equal It is connect with communication bus 113.

Processor 111 can be a general central processor (CPU), microprocessor, application-specific integrated circuit (application-specific integrated circuit, ASIC), or it is one or more for controlling the present invention program The integrated circuit that program executes.

Wherein, the communication bus 113 may include an access, and information is transmitted between said modules.

The memory 112 is connect with the processor 111, and stores the program code that the processor 111 executes；

The processor 111 is connect with the memory 112, for listening to downlink on predetermined preferred channel The first signal SIG1 field in transmission frame；It wherein, include at least one SIG1 field in the physical header of the downlink transmission frame, And second signal SIG2 field corresponding with each SIG1 field respectively, include in the SIG1 field and the SIG1 field The location information of corresponding SIG2 field, and comprising headed by the subchannel where corresponding SIG1 field in the SIG2 field Select the resource allocation information of the site STA of channel；From the SIG1 field listened to, the position letter of corresponding SIG2 field is obtained Breath；In SIG2 field indicated by location information from acquisition, resource allocation information is obtained.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of information transferring method characterized by comprising

Generate downlink transmission frame；It wherein, include at least one first signal SIG1 field in the physical header of the downlink transmission frame Second signal SIG2 field corresponding with each SIG1 field respectively includes and the SIG1 field pair in the SIG1 field The location information for the SIG2 field answered, and comprising being first choice with the subchannel where corresponding SIG1 field in the SIG2 field The resource allocation information of the site STA of channel, so that each STA can obtain resource point and listening to the preferred channel of itself With information；

Send the downlink transmission frame.

2. the method as described in claim 1, which is characterized in that also include in the SIG1 field:

3. method according to claim 1 or 2, which is characterized in that in the SIG1 field further include:

4. method according to claim 1 or 2, which is characterized in that also include in the SIG1 field:

The location information of other SIG2 fields in addition to SIG2 field corresponding with the SIG1 field；Wherein, described other SIG2 field meets: it carries with the resource allocation information for the STA that the subchannel where the SIG1 field is alternative channel, so that Each STA can obtain resource point when the preferred channel for listening to itself is interfered and listening to the alternative channel of itself With information.

5. method as claimed in claim 3, which is characterized in that also include in the SIG1 field:

6. method as claimed in claim 4, which is characterized in that also include in the SIG1 field:

The MCS of other SIG2 fields.

7. method as claimed in claim 5, which is characterized in that also include in the SIG1 field:

The MCS of other SIG2 fields.

8. method as claimed in claim 4, which is characterized in that the preferred channel and alternative channel of each STA is according to such as lower section Formula determines:

It is determined by STA according to the channel quality of every sub-channels of measurement, and is reported to the sender of the downlink transmission frame.

9. such as the described in any item methods of claim 5,6,7, which is characterized in that the preferred channel and alternative channel of each STA It determines as follows:

10. the method as described in claim 1,2,5,6,7,8 is any, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

11. method as claimed in claim 3, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

12. method as claimed in claim 4, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

13. the method as described in claim 1,2,5,6,7,8 is any, which is characterized in that the location information is appointed according to following A kind of mode of anticipating indicates:

Resource bitmap block, tuple and index.

14. method as claimed in claim 3, which is characterized in that the location information is indicated according to any one following mode:

Resource bitmap block, tuple and index.

15. method as claimed in claim 4, which is characterized in that the location information is indicated according to any one following mode:

Resource bitmap block, tuple and index.

16. the method as described in claim 1,2,5,6,7,8,11,12,14,15 is any, which is characterized in that each SIG1 word Section does not overlap on frequency domain, overlapped in the time domain.

17. method as claimed in claim 3, which is characterized in that each SIG1 field does not overlap on frequency domain, in the time domain It is overlapped.

18. method as claimed in claim 4, which is characterized in that each SIG1 field does not overlap on frequency domain, in the time domain It is overlapped.

19. method as claimed in claim 9, which is characterized in that each SIG1 field does not overlap on frequency domain, in the time domain It is overlapped.

20. method as claimed in claim 10, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

21. method as claimed in claim 13, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

22. the method as described in claim 1,2,5,6,7,8,11,12,14,15,17,18,19,20,21 is any, feature It is, each SIG2 field is not overlapped in frequency domain or spatial domain.

23. method as claimed in claim 3, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

24. method as claimed in claim 4, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

25. method as claimed in claim 9, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

26. method as claimed in claim 10, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

27. method as claimed in claim 13, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

28. the method described in claim 16, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

29. a kind of information carrying means characterized by comprising

Downlink transmission frame generation unit, for generating downlink transmission frame；Wherein, comprising extremely in the physical header of the downlink transmission frame A few first signal SIG1 field, and second signal SIG2 field corresponding with each SIG1 field respectively, the SIG1 It include the location information of SIG2 field corresponding with the SIG1 field in field, and comprising with corresponding in the SIG2 field Subchannel where SIG1 field is the resource allocation information of the site STA of preferred channel, so that each STA can be by listening to The preferred channel of itself and obtain resource allocation information；

30. device as claimed in claim 29, which is characterized in that also include in the SIG1 field:

31. the device as described in claim 29 or 30, which is characterized in that in the SIG1 field further include:

32. the device as described in claim 29 or 30, which is characterized in that also include in the SIG1 field:

33. device as claimed in claim 31, which is characterized in that also include in the SIG1 field:

34. device as claimed in claim 32, which is characterized in that also include in the SIG1 field:

The MCS of other SIG2 fields.

35. device as claimed in claim 33, which is characterized in that also include in the SIG1 field:

The MCS of other SIG2 fields.

36. device as claimed in claim 32, which is characterized in that the preferred channel and alternative channel of each STA is according to as follows Mode determines:

37. such as the described in any item devices of claim 33,34,35, which is characterized in that the preferred channel of each STA and alternative Channel determines as follows:

38. the device as described in claim 29,30,33,34,35,36 is any, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

39. device as claimed in claim 31, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

40. device as claimed in claim 32, which is characterized in that the location information includes:

Frequency domain position information and bandwidth information.

41. the device as described in claim 29,30,33,34,35,36 is any, which is characterized in that the location information according to Any one following mode indicates:

Resource bitmap block, tuple and index.

42. device as claimed in claim 31, which is characterized in that the location information refers to according to any one following mode Show:

Resource bitmap block, tuple and index.

43. device as claimed in claim 32, which is characterized in that the location information refers to according to any one following mode Show:

Resource bitmap block, tuple and index.

44. the device as described in claim 29,30,33,34,35,36,39,40,42,43 is any, which is characterized in that each SIG1 field does not overlap on frequency domain, overlapped in the time domain.

45. device as claimed in claim 31, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

46. device as claimed in claim 32, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

47. device as claimed in claim 37, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

48. device as claimed in claim 38, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

49. device as claimed in claim 41, which is characterized in that each SIG1 field does not overlap on frequency domain, in time domain It is upper overlapped.

50. the device as described in claim 29,30,33,34,35,36,39,40,43,43,45,46,47,48,49 is any, It is characterized in that, each SIG2 field is not overlapped in frequency domain or spatial domain.

51. device as claimed in claim 31, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

52. device as claimed in claim 32, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

53. device as claimed in claim 37, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

54. device as claimed in claim 38, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

55. device as claimed in claim 41, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

56. device as claimed in claim 44, which is characterized in that each SIG2 field is not overlapped in frequency domain or spatial domain.

57. a kind of information transferring method characterized by comprising

The first signal SIG1 field in downlink transmission frame is listened on predetermined preferred channel；Wherein, the downlink passes It include at least one SIG1 field, and second signal SIG2 word corresponding with each SIG1 field respectively in the physical header of defeated frame Section, it include the location information of SIG2 field corresponding with the SIG1 field in the SIG1 field, and in the SIG2 field Comprising with the resource allocation information for the site STA that the subchannel where corresponding SIG1 field is preferred channel；

58. a kind of information carrying means characterized by comprising

Unit is listened to, for listening to the first signal SIG1 field in downlink transmission frame on predetermined preferred channel；Its In, it include at least one SIG1 field in the physical header of the downlink transmission frame, and corresponding with each SIG1 field respectively Second signal SIG2 field includes the location information of SIG2 field corresponding with the SIG1 field in the SIG1 field, and Comprising with the resource allocation letter for the site STA that the subchannel where corresponding SIG1 field is preferred channel in the SIG2 field Breath；

Location information acquiring unit, for obtaining the position of corresponding SIG2 field from listening in the SIG1 field that unit listens to Confidence breath；

Resource allocation information acquiring unit, SIG2 field indicated by the location information for being obtained from location information acquiring unit In, obtain resource allocation information.