CN106533612A

CN106533612A - Method for transmitting high efficiency signal-B field, station and access point

Info

Publication number: CN106533612A
Application number: CN201510582984.3A
Authority: CN
Inventors: 刘晟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-09-14
Filing date: 2015-09-14
Publication date: 2017-03-22

Abstract

The invention discloses a method for transmitting a high efficiency signal-B field, a station and an access point. The method comprises the steps of receiving a first transmission block which is sent by the AP on a working channel and corresponds to a special segment of the HE-SIG-B (High Efficiency Signal-B field); judging whether the first transmission block is retransmitted or not; and when the first transmission block is retransmitted, determining at least one second transmission block which repeats the content of the first transmission block, wherein the first transmission block and the at least one second transmission block form a retransmitted dispatching information unit. According to the method for transmitting the HE-SIG-B, the station and he access point provided by the embodiment of the invention, the dispatched STA receives the transmission block corresponding to the special segment of the HE-SIG-B and determines whether the transmission block is retransmitted or not; and when it is determined that the transmission block is retransmitted, other transmission block for repetition is determined, thereby improving the transmission reliability of the special segment of the HE-SIG-B.

Description

The method of transmission high efficiency signaling B field, website and access point

Technical field

It is the present embodiments relate to WLAN field, and efficient more particularly, to a kind of transmission The method of rate signaling B field, website and access point.

Background technology

Next generation wlan system (for example efficiently WLAN (High Efficiency WLAN, HEW)) in system, high efficiency letter of the access point (Access Point, AP) by HEW in leading Make B field (High Efficiency Signal-B field, HE-SIG-B) to carry scheduled website The information such as the resource allocation of (Station, STA), transformat.HE-SIG-B includes HE-SIG-B Public segmentation and HE-SIG-B special segmentation.Wherein, the public segmentation of HE-SIG-B is used for transmitting All scheduled STA are required for the public information for using, the special segmentation of HE-SIG-B to be used for transmitting The specific schedule information of each scheduled STA.

When the SNR of certain STA communicated with AP is poor, even if AP causes to adjust using coding Mode MCS0 processed transmitting the schedule information unit of the special segmentation of the corresponding HE-SIG-B of the STA, The reliable reception of the corresponding schedule information units of the STA cannot also be ensured, so as to cause the STA may be because Its corresponding schedule information unit in HE-SIG-B can not be correctly decoded and its data is lost.In addition, right The channel of 20MHz bandwidth, the public segmentation of HE-SIG-B are repeatedly sent without on frequency domain, for SNR Poor STA, even if the public segmentation that also can exist using MCS0 to transmit the HE-SIG-B, Its transmitting cannot be ensured, cause the STA may be because public point of HE-SIG-B can not be correctly decoded Section and lose its data.

The content of the invention

A kind of method of transmission high efficiency signaling B field, website and access point is embodiments provided, The transmission reliability of the special segmentation of HE-SIG-B can be improved.

A kind of first aspect, there is provided method of transmission high efficiency signaling B field HE-SIG-B, application Access point AP and site STA in the WLAN WLAN of methods described is carried out on working channel Communication, methods described are performed by the STA, including：

The special segmentation for receiving the HE-SIG-B that the AP is sent on the working channel is corresponding First transmission block；

Judge whether first transmission block is repeatedly transmitted；

When first transmission block is repeatedly transmitted, it is determined that repeating the content of first transmission block extremely Few second transmission block, first transmission block and at least one second transmission block are constituted and are repeated The schedule information unit of transmission.

With reference in a first aspect, in a kind of implementation of first aspect, the judgement described first is transmitted Whether block is repeatedly transmitted, including：

Whether the modulation system for judging first transmission block is that orthogonal binary phase-shift keying (PSK) QBPSK is adjusted Mode processed, when the modulation system of first transmission block is QBPSK modulation systems, determines described the One transmission block is repeatedly transmitted, when the modulation system of first transmission block is not QBPSK modulation systems When, determine that first transmission block is not repeatedly transmitted.

With reference to first aspect or its above-mentioned corresponding implementation any one, in the another kind of first aspect In implementation, the HE-SIG-B's sent on the working channel in the reception AP is special Before being segmented corresponding first transmission block, methods described also includes：

Receive high efficiency signaling A field HE-SIG-A that the AP sends；

According to the HE-SIG-A, a width of 20MHz of band of the working channel is determined；

Receive the public segmentation of the HE-SIG-B that the AP is sent on the working channel；

Judge whether the public segmentation of the HE-SIG-B is repeatedly transmitted；

When the public segmentation of the HE-SIG-B is repeatedly transmitted, institute is parsed in the way of time domain repeats State the public segmentation of HE-SIG-B；

It is described when first transmission block is repeatedly transmitted, it is determined that the content of repetition first transmission block At least one second transmission blocks, including：

On the working channel, determined in repetition first transmission block according to the mode that time domain repeats At least one second transmission blocks for holding.

With reference to first aspect or its above-mentioned corresponding implementation any one, in the another kind of first aspect In implementation, the band of the working channel is wider than 20MHz, described when first transmission block is weighed When transmitting again, it is determined that at least one second transmission blocks of the content of repetition first transmission block, including：

When first transmission block is repeatedly transmitted, the side repeated according to time domain on the working channel Formula or the mode repeated according to frequency domain, it is determined that at least one second of the content of repetition first transmission block Transmission block.

With reference to first aspect or its above-mentioned corresponding implementation any one, in the another kind of first aspect In implementation, first transmission block and second transmission block are using different modulation symbols and number Repeated on transmission block according to the mapping mode of subcarrier.

With reference to first aspect or its above-mentioned corresponding implementation any one, in the another kind of first aspect In implementation, the time-domain resource shared by first transmission block or second transmission block be one just Frequency division multiplex OFDM symbol lengths are handed over, shared frequency domain resource is 20MHz.

A kind of second aspect, there is provided method of transmission high efficiency signaling B field HE-SIG-B, application Access point AP and site STA in the WLAN WLAN of methods described is carried out on working channel Communication, methods described are performed by the AP, including：

Judge the signal power to noise power ratio SNR of the STA whether less than threshold value；

When the SNR of the STA is less than threshold value, sent on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding HE-SIG-B of the STA.

It is with reference to second aspect, in a kind of implementation of second aspect, described on the working channel The schedule information list of the special segmentation of the corresponding HE-SIG-B of the STA is sent in a repetitive fashion Unit, including：

It is described using the modulation of orthogonal binary phase-shift keying (PSK) QBPSK modulation systems on the working channel At least one the of first transmission block of schedule information unit and the content for repetition first transmission block Two transmission blocks, and first transmission block and at least one second biography is sent on the working channel Defeated piece.

With reference to second aspect or its above-mentioned corresponding implementation any one, in the another kind of second aspect In implementation, first transmission block and second transmission block are using different modulation symbols and number Repeated on transmission block according to the mapping mode of subcarrier.

With reference to second aspect or its above-mentioned corresponding implementation any one, in the another kind of second aspect In implementation, a width of 20MHz of band of the working channel, it is described on the working channel with repeat Mode send the corresponding HE-SIG-B of the STA special segmentation schedule information unit, bag Include：

The schedule information unit is sent in the way of time domain repeats on the working channel；

Methods described also includes：

The public segmentation of the HE-SIG-B is sent on the working channel in the way of time domain repeats.

With reference to second aspect or its above-mentioned corresponding implementation any one, in the another kind of second aspect In implementation, the band of the working channel is wider than 20MHz, it is described on the working channel with weight Multiple mode sends the schedule information unit of the special segmentation of the corresponding HE-SIG-B of the STA, Including：

Send described in the way of time domain repeats and/or in the way of frequency domain repeats on the working channel Schedule information unit.

With reference to second aspect or its above-mentioned corresponding implementation any one, in the another kind of second aspect In implementation, the time-domain resource shared by first transmission block or second transmission block be one just Frequency division multiplex OFDM symbol lengths are handed over, shared frequency domain resource is 20MHz.

A kind of third aspect, there is provided site STA, the STA in WLAN WLAN with Access point AP is communicated on working channel, and the STA includes：

Receiver module, for receiving the high efficiency signaling B word that the AP is sent on the working channel Corresponding first transmission block of special segmentation of section HE-SIG-B；

Judge module, for judging whether first transmission block that the receiver module is received repeatedly is passed It is defeated；

Processing module, for when first transmission block is repeatedly transmitted, it is determined that repetition described first is passed At least one second transmission blocks of defeated piece of content, first transmission block and described at least one second are passed Defeated piece constitutes the schedule information unit being repeatedly transmitted.

With reference to the third aspect, in a kind of implementation of the third aspect, the judge module specifically for：

With reference to the third aspect or its above-mentioned corresponding implementation any one, in the another kind of the third aspect In implementation, the receiver module is additionally operable to：

In the special segmentation correspondence for receiving the HE-SIG-B that the AP is sent on the working channel The first transmission block before, receive high efficiency signaling A field HE-SIG-A that the AP sends；

The processing module is additionally operable to：

The receiver module is additionally operable to：

The judge module is additionally operable to：

The processing module is additionally operable to：

The processing module is when first transmission block is repeatedly transmitted, it is determined that repetition first transmission At least one second transmission blocks of the content of block, including：

With reference to the third aspect or its above-mentioned corresponding implementation any one, in the another kind of the third aspect In implementation, the band of the working channel is wider than 20MHz, the processing module specifically for：

With reference to the third aspect or its above-mentioned corresponding implementation any one, in the another kind of the third aspect In implementation, first transmission block and second transmission block are using different modulation symbols and number Repeated on transmission block according to the mapping mode of subcarrier.

With reference to the third aspect or its above-mentioned corresponding implementation any one, in the another kind of the third aspect In implementation, the time-domain resource shared by first transmission block or second transmission block be one just Frequency division multiplex OFDM symbol lengths are handed over, shared frequency domain resource is 20MHz.

Fourth aspect, there is provided a kind of access point AP, the AP in WLAN WLAN with Site STA is communicated on working channel, and the AP includes：

Whether judge module, for judging the signal power to noise power ratio SNR of the STA less than threshold value；

Sending module, for when the STA SNR be less than threshold value when, on the working channel with The mode for repeating sends the special segmentation of the corresponding high efficiency signaling B field HE-SIG-B of the STA Schedule information unit.

With reference to fourth aspect, in a kind of implementation of fourth aspect, the sending module is in the work Make on channel, to send the corresponding high efficiency signaling B field HE-SIG-B's of the STA in a repetitive fashion The schedule information unit of special segmentation, including：

With reference to fourth aspect or its above-mentioned corresponding implementation any one, in the another kind of fourth aspect In implementation, first transmission block and second transmission block are using different modulation symbols and number Repeated on transmission block according to the mapping mode of subcarrier.

With reference to fourth aspect or its above-mentioned corresponding implementation any one, in the another kind of fourth aspect In implementation, a width of 20MHz of band of the working channel, the sending module is in the working channel On send special point of the corresponding high efficiency signaling B field HE-SIG-B of the STA in a repetitive fashion The schedule information unit of section, including：

The sending module is additionally operable to：

With reference to fourth aspect or its above-mentioned corresponding implementation any one, in the another kind of fourth aspect In implementation, the band of the working channel is wider than 20MHz, and the sending module is believed in the work Send the special of the corresponding high efficiency signaling B field HE-SIG-B of the STA on road in a repetitive fashion The schedule information unit of segmentation, including：

With reference to fourth aspect or its above-mentioned corresponding implementation any one, in the another kind of fourth aspect In implementation, the time-domain resource shared by first transmission block or second transmission block be one just Frequency division multiplex OFDM symbol lengths are handed over, shared frequency domain resource is 20MHz.

Based on above-mentioned technical characteristic, the method for the transmission high efficiency signaling B field of the embodiment of the present invention, stand Point and access point, scheduled STA receive the corresponding transmission block of special segmentation of HE-SIG-B, and really Whether the fixed transmission block is repeatedly transmitted, when it is determined that the transmission block is repeatedly transmitted, it is determined that for repeating Other transmission blocks, such that it is able to improve the transmission reliability of the special segmentation of HE-SIG-B.

Description of the drawings

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to embodiment or existing skill Accompanying drawing to be used needed for art description is briefly described, it should be apparent that, drawings in the following description Only some embodiments of the present invention, for those of ordinary skill in the art, are not paying creation Property work on the premise of, can be obtaining other accompanying drawings according to these accompanying drawings.

Fig. 1 is the schematic diagram of the typical application scenarios of WLAN.

Fig. 2 is the schematic diagram of the physical layer packet structure of 802.11ax agreements.

Fig. 3 is the schematic diagram of the structure of HE-SIG-B.

Fig. 4 A and Fig. 4 B are the schematic diagrams of schedule information unit.

Fig. 5 is the indicative flowchart of the method for the transmission HE-SIG-B of one embodiment of the invention.

Fig. 6 transmits showing for HE-SIG-B when being a width of 20MHz of band of the working channel of the embodiment of the present invention It is intended to.

Fig. 7 transmits showing for HE-SIG-B when being a width of 80MHz of band of the working channel of the embodiment of the present invention It is intended to.

Fig. 8 is the schematic diagram of the planisphere of BPSK and QBPSK.

Fig. 9 is the indicative flowchart of the method for the transmission HE-SIG-B of another embodiment of the present invention.

Figure 10 is showing for the judgement flow process that the STA of one embodiment of the invention repeats transmission to HE-SIG-B It is intended to.

Figure 11 is the STA schematic block diagrams of one embodiment of the invention.

Figure 12 is the AP schematic block diagrams of one embodiment of the invention.

Figure 13 is the STA schematic block diagrams of another embodiment of the present invention.

Figure 14 is the AP schematic block diagrams of another embodiment of the present invention.

Specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is a part of embodiment of the invention, rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound The every other embodiment obtained on the premise of working by the property made, belongs to the scope of protection of the invention.

First to WLAN (Wireless local Area Network, WLAN) and present document relates to High efficiency WLAN (High Efficiency WLAN, HEW) is simply introduced.

Fig. 1 is the schematic diagram of the typical application scenarios of WLAN.As shown in figure 1, wrapping in WLAN Include access point (Access Point, AP) and website (Station, STA).AP is responsible for and multiple STA Carry out two-way communication, such as the AP illustrated in Fig. 1 is to STA (such as the STA1 and STA2 in Fig. 1) Downlink data is sent, or AP receives the upstream data from STA (STA3 in such as Fig. 1).Should Understand, the AP illustrated in Fig. 1 and the number of STA are only illustrative, can include appointing in WLAN The AP and STA of meaning quantity.

It is existing based on OFDM (Orthogonal Frequency-Division Multiplexing, OFDM) the version such as 802.11a, 802.11n, 802.11ac of the wlan standard of technology by progressively evolution This composition.Current Institute of Electrical and Electric Engineers (Institute of Electrical and Electronics Engineers, IEEE) 802.11 normal structures have had been turned on WLAN of new generation of referred to as HEW and have marked The standardization effort of standard, i.e. 802.11ax.The 802.11ax standards support orthogonal frequency division multiplexing multiple access (Orthogonal Frequency-Division Multiple Access, OFDMA) technology.OFDMA Channel is divided into into multiple orthogonal subcarriers in frequency domain, and distributes different sons for different users Carrier wave, so as to the orthogonal multiplex for realizing multiple users is transmitted.

Fig. 2 is the schematic diagram of the physical layer packet structure of 802.11ax agreements.802.11ax the physics of agreement The part that layer packet structure most starts is legacy preamble, and legacy preamble is by Legacy Short Training Field (Legacy Short Training field, L-STF), traditional long training field (Legacy Long Training field, L-LTF) constitute with legacy signaling field (Legacy Signal field, L-SIG).802.11ax agreement The last part of physical layer packet structure be data field.Between legacy preamble and data field it is 802.11ax agreement special provisions it is leading, i.e., HEW is leading.HEW is leading including the tradition letter for repeating Make field (Repeated Legacy Signal field, RL-SIG), high efficiency signaling A field (High Efficiency Signal-A field, HE-SIG-A), high efficiency signaling B field (High Efficiency Signal-B field, HE-SIG-B), high efficiency short training field (High Efficiency Short Training Field, HE-STF) and high efficiency long training field (High Efficiency Long Training field, The field such as HE-LTF).

Wherein, data field is used for transmission data；L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B It is respectively used to transmit different types of physical layer signaling etc. field；L-STF, L-LTF, HE-STF and The fields such as HE-LTF be then mainly used in receiving terminal be timed, Frequency Synchronization, automatic growth control and channel The purposes such as estimation.Legacy preamble, the OFDM symbol of RL-SIG, HE-SIG-A and HE-SIG-B are adopted The a width of 312.5KHz of sub-carrier bin, for 20MHz, 40MHz, 80MHz and 160MHz etc. The channel of bandwidth, corresponds to 64,128,256,512 subcarriers respectively.Wherein, 20MHz bandwidth OFDM symbol includes 48 or 52 data subcarriers for transmitting corresponding signaling information.

In HEW is leading, HE-SIG-B is typically included in down physical layer packet, is mainly used in taking The information such as the resource allocation of the scheduled STA of band, transformat, generally do not wrap in upstream physical layer packet Include HE-SIG-B.For downlink data transmission, scheduled STA is known by receiving HE-SIG-B AP whether is included in the physical layer packet and is sent to the downlink data of oneself, and transmit the lower line number According to information such as the channel resources, transformat for being used, to receive the descending of oneself according to these information Data；For transmitting uplink data, whether scheduled STA knows AP by receiving HE-SIG-B Allow oneself to send upstream data, and transmission upstream data used channel resource, transformat etc. Information, to send the upstream data of oneself according to these information.

Fig. 3 is the schematic diagram of the structure of HE-SIG-B.As shown in figure 3, HE-SIG-B is divided to for two sections, Including the public segmentation (HE-SIGB-common) and the special segmentation of HE-SIG-B of HE-SIG-B (HE-SIGB-dedicated).Wherein, the public segmentation of HE-SIG-B is used for transmitting Basic Service Set mark Know symbol (Basic Service Set Identity, BSSID), the length of the special segmentations of HE-SIGB, HE-LTF Symbol lengths, the guard time interval information such as (Guard Interval, GI), these information are all Scheduled STA is required for the public information for using.802.11ax standards support 20MHz, 40MHz, The channel of the different bandwidths such as 80MHz and 160MHz, the public segmentation of HE-SIG-B and legacy preamble, RL-SIG is identical with HE-SIG-A etc., be all carry out in the channel of 20MHz bandwidth it is code modulated, Channel to 40MHz, 80MHz and 160MHz bandwidth, then carried out again on each 20MHz frequency band It is multiple, i.e., identical content is transmitted on each 20MHz frequency band.Thus, receiving terminal can be by each 20MHz The signal of these signaling fields on frequency band is merged, so as to improve the reliability for receiving these signaling fields Property.

The special segmentation of HE-SIG-B is used for transmitting the specific schedule information of each scheduled STA, such as STA Identifier, the Resource Unit (Resource Unit, RU) distributed on the frequency domain of the STA, coding are adjusted The information such as mode (Modulation Coding Scheme, MCS) processed, spatial stream number.These information are Only need to receive the special segmentation of HE-SIG-B for specific STA, i.e. each scheduled STA In one's own transmission control information, and the transmission control information of other scheduled STA need not be received. The special segmentation of HE-SIG-B is made up of multiple schedule information units, and each scheduled STA exists There is corresponding schedule information unit in the special segmentation of HE-SIG-B, each schedule information unit can be passed The specific schedule information of a defeated STA, it is also possible to transmit the specific schedule information of multiple STA.Thus, Each scheduled STA only needs to one's own schedule information in the special segmentation for receive HE-SIG-B Unit, and other schedule information units need not be received.

Each schedule information unit is an independent coded modulation unit.To in each schedule information unit Information bit, firstly generate cyclic redundancy check (CRC) (Cyclic Redundancy Check, CRC) bit, Then Channel Coding and Modulation is carried out using certain MCS, wherein CRC bits are judged for receiving terminal The information bit whether being properly received in the schedule information unit.Typically, a schedule information unit In the channel of 20MHz bandwidth encoded and modulated, time span is 1 or 2 OFDM symbols Number, as shown in Figure 4 A and 4 B shown in FIG..For example, if the specific schedule information of each STA includes 24 Uncoded bit (including CRC), then can adopt numbering to be passed for 0 MCS (i.e. MCS0) It is defeated, i.e., 48 encoded bits are generated using the convolutional encoding that code rate is 1/2, then enter using two Phase-shift keying (PSK) (Binary Phase Shift Keying, BPSK) processed modulation generates 48 modulation symbols, and It is transmitted by 48 data subcarriers in the 20MHz bandwidth of 1 OFDM symbol, time span For 1 OFDM symbol.As shown in Figure 4 A, now the schedule information unit can only transmit a STA Specific schedule information.If be transmitted using the MCS (i.e. MCS1) that numbering is 1, because MCS1 adopt code rate for 1/2 convolutional encoding and QPSK (Quadrature Phase Shift Keying, QPSK) modulation, totally 48 uncoded bit (including CRC) can be transmitted, so one Individual schedule information unit can be with the specific schedule information of 2 STA of simultaneous transmission, and time span is still 1 OFDM symbol, still as shown in Figure 4 A.If 2 STA's of a schedule information unit simultaneous transmission Specific schedule information 48 uncoded bit (including CRC) but still is transmitted using MCS0 totally, 48 data subcarriers in the 20MHz bandwidth by 2 OFDM symbols are then needed to be transmitted, when Between length be 2 OFDM symbols, as shown in Figure 4 B.

It should be understood that each schedule information unit can include at least one transmission block, usual schedule information list Unit is transmitted using non-duplicate mode, i.e., one schedule information unit corresponds to a transmission block.And when with m During times repetitive mode transmitting scheduling information unit, the schedule information unit for repeating corresponds to m transmission block, Each transport block transmission identical schedule information.STA receive HE-SIG-B special segmentation when, with All of transmission block is received by transmission block for unit, will all of schedule information unit receive, then solve Analysis schedule information unit, finds oneself corresponding schedule information unit.It is single that transmission block is referred to as transmission Unit or control block.

For ensure each scheduled STA can reliable reception HE-SIG-B public segmentation and Corresponding schedule information unit in the special segmentation of HE-SIG-B, each scheduled STA receive this two The packet error probability (Packet Error Rate, PER) of individual part should be generally less than 1%.By contrast, The PER of data field typically not greater than 10%.For this purpose, in prior art HE-SIG-B it is public Segmentation is transmitted using MCS0, and schedule information unit is passed using the uplink and downlink data than the STA The MCS of defeated low order.The MCS lists that table 1 is commonly used in showing WLAN, with MCS sequence numbers Increase, from low order to high-order, the data transfer rate of transmission is higher for MCS, but the signal noise power needed for receiving It is also higher than (Signal to Noise Ratio, SNR).Thus, if AP using MCS3 to specific Site STA 1 send downlink data, then the corresponding schedule information units of STA1 are at least using than MCS3 The MCS of more low order for example, is transmitted using MCS1 transmitting.

The MCS commonly used in 1 WLAN of table

MCS sequence numbers

Modulation system

Code rate

0	BPSK	1/2
			1	QPSK	1/2
2	QPSK	3/4
			3	16QAM	1/2
4	16QAM	3/4
			5	64QAM	2/3
6	64QAM	3/4
			7	64QAM	5/6
8	256QAM	3/4
			9	256QAM	5/6

However, in some cases, the SNR of certain STA communicated with AP is poor so that i.e. Make using MCS0 come the schedule information unit of the special segmentation for transmitting the corresponding HE-SIG-B of the STA, The transmitting of the corresponding schedule information units of the STA cannot also be ensured, so as to cause the STA may be because Its corresponding schedule information unit in HE-SIG-B can not be correctly decoded and its data is lost.In addition, right The channel of 20MHz bandwidth, the public segmentation of HE-SIG-B are repeatedly sent without on frequency domain, for SNR Poor STA, even if the public segmentation that also can exist using MCS0 to transmit the HE-SIG-B, Its transmitting cannot be ensured, cause the STA may be because public point of HE-SIG-B can not be correctly decoded Section and lose its data.

The present invention is precisely in order to solving the above problems and being made that improvement.

Fig. 5 is the indicative flowchart of the method 100 of the transmission HE-SIG-B of one embodiment of the invention. Using the access point AP in the WLAN WLAN of the method 100 and site STA in working channel On communicated, the method 100 is performed by the AP, including：

Whether S110, determine the signal power to noise power ratio SNR of the STA less than threshold value；

S120, when the SNR of the STA is less than threshold value, repeats to send the STA on the working channel The schedule information unit of the special segmentation of the corresponding HE-SIG-B.

Wherein, the threshold value is determined using PER performance curves during MCS0 transmission by schedule information unit, For example, corresponding SNR value when the threshold values being chosen for PER=1%, so, as the SNR of the STA During more than the threshold values, the demand of the schedule information unit transmitting can be met using MCS0, therefore Without the need for repeating to transmit, but when the SNR of the STA is less than the threshold values, PER more than 1%, i.e., cannot Meet the demand of the schedule information unit transmitting, therefore need to be transmitted using repetitive mode.When this When the SNR of STA is equal to the threshold values, can repeat to send the special of the corresponding HE-SIG-B of the STA The schedule information unit of segmentation, it is also possible to repeatedly do not send, if repeatedly transmission can rule of thumb, just Depending on the size that the concrete condition or threshold values that method is implemented is chosen, the embodiment of the present invention is not construed as limiting to this.

Therefore, the method for the transmission HE-SIG-B of the embodiment of the present invention, when presence in scheduled STA When SNR is less than the STA of threshold value, special point less than the corresponding HE-SIG-B of STA of threshold value of SNR The schedule information unit of section, it is impossible to ensure its reliable reception, carries out repeating transmission to schedule information unit, The transmission reliability of the special segmentation of HE-SIG-B can be improved.

Alternatively, as one embodiment, a width of 20MHz of band of the working channel, S120 is in the work The schedule information unit of the special segmentation for repeating to send the corresponding HE-SIG-B of the STA on channel, bag Include：

The method 100 also includes：

Specifically, for the working channel of 20MHz bandwidth, when AP dispatches SNR less than threshold value When STA carries out downlink data transmission and/or transmitting uplink data, the MCS (typical cases using lower-order are needed Adopt MCS0) transmitting, just can guarantee that the reliability of data transfer.Correspondingly, in order to ensure thing In the public segmentation of HE-SIG-B and the special segmentation of HE-SIG-B of reason layer packet, the STA is corresponding The reliability of the transmission of schedule information unit, the public segmentation and HE-SIG-B to HE-SIG-B it is special In segmentation, the corresponding schedule information units of the STA are transmitted by the way of repeating in time domain.Wherein, Repeat multiple m and be more than or equal to 2, it is preferable that be typically repeated multiple m and transmission ensured that equal to 2 Reliability.

It should be understood that repeat multiple m can be set by standard, such as selection in standard, can be fixed M=2.Repeat multiple m to adopt 1 or 2 bits to indicate in HE-SIG-A.Additionally, Following content can also be set in standard.For example, in a width of 20MHz of band of working channel, HE-SIG-B Public segmentation and HE-SIG-B special segmentation in schedule information unit repetition transmission using time domain weight Multiple mode and continuous appearance；When the band of working channel is wider than 20MHz, HE-SIG-B's is special In segmentation, the repetition transmission of schedule information unit can be so that by the way of being repeated using time domain, (continuous appearance, that is, exist Transmission block is sent in time domain repeatedly), it would however also be possible to employ mode (the m 20MHz of occupancy that frequency domain repeats Frequency band has the specific relation that standard specifies, i.e., repeatedly send transmission block on frequency domain), etc..

Fig. 6 is the signal that a width of 20MHz of band of the working channel of the embodiment of the present invention transmits HE-SIG-B Figure.Situation to a width of 20MHz of band of working channel, if the public field of HE-SIG-B is using weight Multiple to transmit, then in meaning the special segmentation of HE-SIG-B, at least one is using repetitive mode transmission Schedule information unit.

It should be noted that the embodiment of the present invention does not limit the public field of HE-SIG-B and scheduling letter The repetitive mode used by interest statement unit.It is for instance possible to use the mode of direct Repeated m time, will The signal of the public field of HE-SIG-B or schedule information unit modulation is launched m time；Can also be in difference Transmission block on carry out repeating transmission using the mapping mode of different modulation symbols and data subcarrier, i.e., It is identical using content (public field of the information transmitted, i.e. HE-SIG-B or schedule information unit), But the different mode of transmission signal carries out repeating transmission.For example, if the specific schedule information of STA includes 24 uncoded bit (including CRC), carries out generating 48 modulation symbols after coded modulation using MCS0 Number, it is transmitted by 48 data subcarriers (such as the first transmission block) of 1 OFDM symbol, The signal for repeating also includes 1 OFDM symbol, and its 48 data subcarriers also transmit above-mentioned 48 tune Symbol (such as the second transmission block) processed, but the mapping mode of 48 modulation symbols and 48 data subcarriers Difference, compares and directly repeats, and such benefit can be acquisition frequency diversity gain.

Correspondingly, first transmission block and second transmission block are using different modulation symbols and data What the mapping mode of carrier wave was repeated on transmission block.

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, and S120 is in the work Make the schedule information unit of special segmentation for repeating to send the corresponding HE-SIG-B of the STA on channel, Including：

The scheduling is sent in the way of time domain repeats and/or in the way of frequency domain repeats on the working channel Information unit.

Specifically, for the working channel of the large bandwidths such as 40MHz, 80MHz, 160MHz, when When AP scheduling SNR carry out downlink data transmission and/or transmitting uplink data less than the STA of threshold value, under which Row data transfer and/or transmitting uplink data need the MCS using lower-order (typically with MCS0) To transmit, the reliability of data transfer is just can guarantee that.Correspondingly, the HE-SIG-B of physical layer packet In special segmentation, the corresponding schedule information units of the STA are carried out by the way of repeating in time domain or frequency domain Transmission, wherein repeatedly multiple m >=2.Wherein, repeat multiple m and be more than or equal to 2, it is preferable that be general Repeat the reliability that multiple m ensures that transmission equal to 2.

It should be noted that the embodiment of the present invention does not limit the repetitive mode used by schedule information unit. For example, if sending schedule information unit in the way of time domain repeats on working channel, can be using straight The mode for connecing repetition sends, it would however also be possible to employ the mapping mode weight of different modulation symbols and data subcarrier Recurrence is sent；If sending schedule information unit in the way of frequency domain repeats on working channel, the scheduling is believed Interest statement unit can directly repeat on multiple different 20MHz frequency bands (launch identical signal), can To obtain frequency diversity gain.

Fig. 7 is the signal that a width of 80MHz of band of the working channel of the embodiment of the present invention transmits HE-SIG-B Figure.As shown in fig. 7, in a specific example, a width of 80MHz of band of working channel, scheduling letter The SNR of interest statement unit 1 and 2 corresponding STA of schedule information unit is less than threshold value.Schedule information unit 1 When carrying out downlink data transmission and/or transmitting uplink data with 2 corresponding STA of schedule information unit, need Transmitted using the MCS (typically with MCS0) of lower-order, just can guarantee that the reliability of data transfer Property.In order to ensure that they distinguish the reliable reception of corresponding schedule information unit 1 and schedule information unit 2, Schedule information unit 1 is transmitted (repeated with two transmission blocks in time domain) in the way of time domain repeats, Schedule information unit 2 is transmitted (repeated with two transmission blocks on frequency domain) in the way of frequency domain repeats.

It should be understood that when multiple m is repeated more than 2 in the embodiment of the present invention, both can adopt with time domain weight Multiple mode, adopts again and sends schedule information unit in the way of frequency domain repeats, and the embodiment of the present invention is to this It is not construed as limiting.

It should also be understood that in embodiments of the present invention, the mode that time domain repeats preferably can be using in time domain On the mode that continuously repeats, i.e., repeated by the way of continuous OFDM symbol.As shown in fig. 7, Schedule information unit 1 occupies 2 companies in time domain using transmitting by the way of 2 times of repetitions in time domain The time span of continuous transmission block (2 non-repetitive schedule information units of correspondence).The side that frequency domain repeats During formula so that the m 20MHz frequency band that the schedule information unit being repeatedly transmitted takes has what is determined Relation.That is, once STA determines first 20MHz frequency band that the schedule information being repeatedly transmitted takes, It is known that the position of its other 20MHz frequency band for taking.As shown in fig. 7, schedule information unit 2 is adopted On frequency domain, the mode of 2 times of repetitions is transmitted, and takes two transmission blocks, 2 20MHz of occupancy on frequency domain Relation between frequency band is specific.For example, each 20MHz frequency band of 80MHz channels is compiled successively Number be 1,2,3,4, then one using frequency domain repeatedly by the way of the schedule information unit that transmits, always go out Present 1st and the 2nd, the 2nd and the 3rd, the 3rd and the 4th or the 4th and the 1st 20MHz frequency Take.

In embodiments of the present invention, AP sends the public affairs of HE-SIG-B on working channel in a repetitive fashion During the schedule information unit of the special segmentation for being divided into section or the corresponding HE-SIG-B of STA, should notify corresponding Scheduled STA HE-SIG-B public segmentation, and in the special segmentation of HE-SIG-B certain Whether a little schedule information units employ in the way of time domain repeats and/or carry out in the way of frequency domain repeats Transmission, so that the STA being scheduled can carry out corresponding reception processing.

In embodiments of the present invention, AP can by explicit mode, i.e., in HE-SIG-A or Increase a number of signaling bit in the public segmentation of HE-SIG-B, to indicate that HE-SIG-B's is public Whether segmentation repeats, which schedule information unit is repeated (to include in the special segmentation of HE-SIG-B It is in time domain or in frequency domain repetition etc.).But, on the one hand, when the scheduling letter transmitted using repetitive mode When interest statement unit is more, explicit signaling method will cause larger signaling consumption；On the other hand, current In standardisation process, the public segmentation of HE-SIG-A or HE-SIG-B is all shorter (typically only Have the length of an OFDM symbol), the signaling bit that can be transmitted is very limited, therefore, using aobvious The signaling method of formula, it is difficult to effectively realize that AP notifies corresponding scheduled STA.

For this purpose, embodiment of the present invention S120 repeat to send on the working channel STA is corresponding should The schedule information unit of the special segmentation of HE-SIG-B, can include：Using orthogonal on the working channel Binary phase shift keying (Quadrature Binary Phase Shift Keying, QBPSK) modulation system is adjusted Make first transmission block and for repeating the content of first transmission block at least one of the schedule information unit Second transmission block, and first transmission block and at least one second transmission block is sent on the working channel.

Specifically, the public segmentation of HE-SIG-B is transmitted generally using MCS0.To HE-SIG-B Special segmentation for, when exist in scheduled STA SNR less than threshold value STA when, even if adopting Reliable receptions of the STA to the corresponding schedule information units of the STA be cannot guarantee that with MCS0, because This needs to be transmitted using repetitive mode.Therefore, using repetitive mode come the schedule information unit for transmitting Coding is modulated using MCS0, its modulation system is unlikely to be QPSK, is less likely to be modulation order The higher modulation system of number.For this purpose, to using repetitive mode transmitting in the embodiment of the present invention The public segmentation of HE-SIG-B and using repetitive mode come in the special segmentation of the HE-SIG-B for transmitting Schedule information unit is modulated using QBPSK.I.e. when schedule information unit repeats, which includes at least two Individual transmission block, such as, including the first transmission block and the second transmission block, the first transmission block and the second transmission block are equal Modulated using QBPSK modulation systems.

Fig. 8 shows binary phase shift keying (Binary Phase Shift Keying, BPSK) and QBPSK Planisphere schematic diagram.In example illustrated in fig. 8, QBPSK is identical with the order of modulation of BPSK, It is the information of modulation symbol 1 bit of transmission.Wherein, the constellation point of the signal of BPSK modulation It is distributed on I branch roads (In-phase), the signal on Q branch roads (Quadrature) is zero.QBPSK Planisphere then have rotated 90 degree, the constellation point of the signal of modulation is only distributed on Q branch roads, and I branch roads On signal be zero.In the embodiment of the present invention, modulate the HE-SIG-B's of repetition transmission using QBPSK Corresponding to schedule information unit in public segmentation and the special segmentation of the HE-SIG-B for repeating transmission Transmission block (i.e. the data subcarrier of OFDM symbol).Therefore, STA can utilize QBPSK planispheres The feature being rotated by 90 °, by judging whether the signal carried by transmission block is QBPSK modulated signals, Can just judge whether to repeat transmission so as to carry out corresponding reception processing.

Therefore, the method for the transmission HE-SIG-B of the embodiment of the present invention, for the channel feelings of different bandwidth Condition, the public segmentation to HE-SIG-B and the schedule information unit in the special segmentation of HE-SIG-B are selected Property ground using time domain repeat or frequency domain repeat by the way of be transmitted, wherein, selectivity refer to work as be adjusted There is STAs, public segmentation (the only 20MHz of HE-SIG-B of the SNR less than threshold value in the STA of degree During bandwidth) even and if SNR less than threshold value the corresponding schedule information units of STA using MCS0 also without When method ensures reliable reception, pointedly implement to repeat to transmit, the transmission that can improve HE-SIG-B can By property.

The method for describing the transmission HE-SIG-B of the embodiment of the present invention above from the angle of AP in detail, under Face is described from the angle of STA.

Fig. 9 is the schematic flow of the method 200 of the transmission HE-SIG-B of another embodiment of the present invention Figure.Access point AP and site STA in the WLAN WLAN of application process 200 is in work letter Communicated on road, method 200 is performed by STA, including：

S210, the special segmentation for receiving the HE-SIG-B that the AP is sent on the working channel are corresponding First transmission block；

S220, judges whether first transmission block is repeatedly transmitted；

S230, when first transmission block is repeatedly transmitted, it is determined that repeat the content of first transmission block At least one second transmission blocks, first transmission block and at least one second transmission block are constituted and are repeatedly passed Defeated schedule information unit.

Therefore, the method for the transmission HE-SIG-B of the embodiment of the present invention, scheduled STA are received The corresponding transmission block of special segmentation of HE-SIG-B, and determine whether the transmission block is repeatedly transmitted, when true When the fixed transmission block is repeatedly transmitted, it is determined that for other transmission blocks for repeating, such that it is able to improve The transmission reliability of the special segmentation of HE-SIG-B.

Specifically, AP can be by explicit mode, i.e., in the public affairs of HE-SIG-A or HE-SIG-B Increase a number of signaling bit in being divided into section, to indicate whether the public segmentation of HE-SIG-B repeats, In the special segmentation of HE-SIG-B which schedule information unit repeated (including be time domain or Frequency domain repetition etc.).STA determines public segmentation or the schedule information unit of HE-SIG-B according to signaling bit Whether it is repeatedly transmitted.

Preferably, S220 judges whether first transmission block is repeatedly transmitted, and can include：

Whether the modulation system for judging first transmission block is orthogonal binary phase-shift keying (PSK) QBPSK modulation Mode, when the modulation system of first transmission block is QBPSK modulation systems, determines first transmission Block is repeatedly transmitted, when the modulation system of first transmission block is not QBPSK modulation systems, it is determined that First transmission block is not repeatedly transmitted.

Specifically, in an OFDM symbol of each transmission block of HE-SIG-B can include 48 or 52 data subcarriers, each transmission block of HE-SIG-Bs of the STA to receiving, compare its institute first There is the size of the gross energy of signal I branch roads and Q branch roads on data subcarrier.In view of the shadow for receiving noise Ring, for BPSK modulated signals, on all data subcarriers, the gross energy of signal I branch roads is far longer than Q The gross energy of branch road；For modulated signals such as QPSK, 16QAM, 64QAM, due to its constellation it is equal Even distribution, on all data subcarriers, the gross energy of the gross energy and Q branch roads of signal I branch roads is close to；And To QBPSK modulated signals, on all data subcarriers, the gross energy of signal Q branch roads is far longer than I The gross energy on road.Wherein, QAM is quadrature amplitude modulation (Quadrature Amplitude Modulation).

Therefore, to each transmission block, can be by signal on all data subcarriers in 1 OFDM symbol The difference of the gross energy of Q branch roads and the gross energy of I branch roads is compared with the thresholding of setting as judgement amount, Judge so as to area whether the signal on the data subcarrier of the transmission block is QBPSK modulated signals.Especially Ground, the public segmentation for HE-SIG-B and the schedule information unit in the special segmentation of HE-SIG-B, If its length is 2 or more than 2 OFDM symbols, can further by its all OFDM symbol On all data subcarriers on number, the gross energy of signal Q branch roads and the difference of the gross energy of I branch roads are used as sentencing Certainly measure, so as to further improve the accuracy of judgement.

It should be understood that (for example, first transmission block and second transmission block) is to adopt on different transmission blocks Repeated on transmission block with the mapping mode of different modulation symbols and data subcarrier, it is also possible to Carry out directly repeating, the embodiment of the present invention is not construed as limiting this.Preferably, first transmission block or The time-domain resource shared by second transmission block is orthogonal frequency division multiplex OFDM symbol lengths, shared Frequency domain resource is 20MHz.

Alternatively, as one embodiment, S210 receive that the AP sent on the working channel should Before corresponding first transmission block of special segmentation of HE-SIG-B, the method 200 also includes：

Receive high efficiency signaling A field HE-SIG-A that the AP sends；

When the public segmentation of the HE-SIG-B is repeatedly transmitted, this is parsed in the way of time domain repeats The public segmentation of HE-SIG-B；

S230 when first transmission block is repeatedly transmitted, it is determined that repeating the content of first transmission block extremely Few second transmission block, including：

On the working channel, the mode repeated according to time domain determines the content of repetition first transmission block At least one second transmission blocks.

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, S230 when this When one transmission block is repeatedly transmitted, it is determined that repeating at least one second transmission of the content of first transmission block Block, including：

When first transmission block is repeatedly transmitted, on the working channel according to time domain repeat mode or According to the mode that frequency domain repeats, it is determined that repeating at least one second transmission blocks of the content of first transmission block.

Alternatively, in embodiments of the present invention, first transmission block or shared by second transmission block when Domain resource is orthogonal frequency division multiplex OFDM symbol lengths, and shared frequency domain resource is 20MHz.

Figure 10 shows that STA repeats the schematic diagram of the judgement flow process of transmission to HE-SIG-B.Tie below Close Figure 10 to describe in a specific example, STA repeats HE-SIG-B the judgement flow process 300 of transmission.

S310, determines the bandwidth of working channel according to HE-SIG-A.In prior art in HE-SIG-A The configured information of the bandwidth of working channel is carried, therefore, it can determine STA's according to HE-SIG-A The bandwidth of working channel.

S320, as a width of 20MHz of the band of working channel, in the public field length of HE-SIG-B OFDM symbol data subcarrier on the modulation system of signal judged.For example, adopt institute The difference of the gross energy of the Q branch roads of the signal having on data subcarrier and the gross energy of I branch roads is used as judgement amount The mode being compared with the thresholding of setting is judged.If it is determined that QBPSK modulation, the then thing The public field of HE-SIG-B of layer packet is managed by the way of repeating to transmit, so as to be connect accordingly Receipts process.For example, the length for judging the public field of HE-SIG-B is 1 OFDM symbol, if Judge the signal on the data subcarrier in the OFDM symbol modulation system be QBPSK modulation, then The public field of HE-SIG-B is transmitted using repetition side, i.e. the 2nd after the OFDM symbol OFDM Symbol falls within the public field of HE-SIG-B, and STA then can repeat the HE-SIG-B's for transmitting to this Public field carries out corresponding reception processing.

Situation to a width of 20MHz of band of working channel, if the public field of HE-SIG-B is using weight Multiple to transmit, then in meaning the special segmentation of HE-SIG-B, at least one is using the scheduling for repeating transmission Information unit, therefore, if it is determined that the public field of HE-SIG-B is using repeating to transmit, then it is then right Whether the schedule information unit in the special segmentation of HE-SIG-B is judged using repeating transmission, otherwise without Whether the schedule information unit in the special segmentations of HE-SIG-B need to be judged using repetition transmission.

S330, the special segmentation to HE-SIG-B, in units of each transmission block, judge its data Signal modulation mode on carrier wave.If it is determined that QBPSK modulation, then determine whether the transmission block Signal modulation mode on the data subcarrier of the next transmission block on the 20MHz frequency bands at place, if It is judged as that QBPSK is modulated, then schedule information unit is transmitted by the way of time domain repeats, otherwise the tune Degree information unit is provided without repeating transmission.

S340, when the band of working channel is wider than 20MHz, then the special segmentation to HE-SIG-B, In units of each transmission block, the signal modulation mode on its data subcarrier is judged.If it is determined that QBPSK is modulated, then determine whether the number of the transmission block on corresponding other the 20MHz frequency bands of the transmission block According to the signal modulation mode on subcarrier, if it is determined that QBPSK modulation, then the schedule information unit Transmit by the way of frequency domain repeats；Otherwise, perform S350.

S350, determines whether the number of the next transmission block on the 20MHz frequency bands at transmission block place According to the signal modulation mode on subcarrier, if it is determined that QBPSK modulation, then the schedule information unit Transmit by the way of time domain repeats, otherwise the schedule information unit is provided without repeating transmission.

It should be understood that the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, each process Execution sequence should be determined with its function and internal logic, and should not be to the implementation process of the embodiment of the present invention Constitute any restriction.

Above in conjunction with Fig. 5 to Figure 10, transmission HE-SIG-B according to embodiments of the present invention is described in detail Method, below in conjunction with Figure 11 and Figure 14, STA according to embodiments of the present invention and AP is described.

Figure 11 shows STA 400 according to embodiments of the present invention.The STA 400 in a wlan with AP is communicated on working channel, and as shown in figure 11, the STA 400 includes：

Receiver module 410, for receiving the high efficiency signaling B field that the AP is sent on the working channel Corresponding first transmission block of special segmentation of HE-SIG-B；

Judge module 420, for judging whether first transmission block that the receiver module 410 is received is weighed It is multiple to transmit；

Processing module 430, for when first transmission block is repeatedly transmitted, it is determined that repeat first biography At least one second transmission blocks of defeated piece of content, first transmission block and at least one second transmission block The schedule information unit that composition is repeatedly transmitted.

Therefore, the STA of the embodiment of the present invention, receives the corresponding transmission block of special segmentation of HE-SIG-B, And determine whether the transmission block is repeatedly transmitted, when it is determined that the transmission block is repeatedly transmitted, it is determined that being used for Other transmission blocks for repeating, such that it is able to improve the transmission reliability of the special segmentation of HE-SIG-B.

Alternatively, as one embodiment, the judge module 420 specifically for：

Alternatively, as one embodiment, the receiver module 410 is additionally operable to：

In the special segmentation corresponding first for receiving the HE-SIG-B that the AP is sent on the working channel Before transmission block, high efficiency signaling A field HE-SIG-A that the AP sends is received；

The processing module 430 is additionally operable to：

The receiver module 410 is additionally operable to：

The judge module 420 is additionally operable to：

The processing module 430 is additionally operable to：

The processing module 430 is when first transmission block is repeatedly transmitted, it is determined that repeating first transmission block Content at least one second transmission blocks, including：

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, the processing module 430 specifically for：

Alternatively, in embodiments of the present invention, first transmission block and second transmission block are using different The mapping mode of modulation symbol and data subcarrier repeated on transmission block.

It should be understood that STA 400 according to embodiments of the present invention is may correspond in the inventive method embodiment Above and other operation of the modules in executive agent, and STA 400 and/or function respectively in order to The corresponding flow process of each method in Fig. 5 to Figure 10 is realized, for sake of simplicity, will not be described here.

Figure 12 shows AP 500 according to embodiments of the present invention.The AP 500 in a wlan with STA Communicated on working channel, as shown in figure 12, the AP 500 includes：

Whether judge module 510, for judging the signal power to noise power ratio SNR of the STA less than threshold value；

Sending module 520, for when the SNR of the STA is less than threshold value, with weight on the working channel Multiple mode sends the scheduling of the special segmentation of the corresponding high efficiency signaling B field HE-SIG-B of the STA Information unit.

Therefore, when there is STAs of the SNR less than threshold value in scheduled STA in embodiment of the present invention AP When, schedule information units of the SNR less than the special segmentation of the corresponding HE-SIG-B of STA of threshold value, nothing Method ensures its reliable reception, and AP carries out repeating transmission to schedule information unit, can improve HE-SIG-B Special segmentation transmission reliability.

Alternatively, as one embodiment, side of the sending module 520 on the working channel to repeat Formula sends the schedule information list of the special segmentation of the corresponding high efficiency signaling B field HE-SIG-B of the STA Unit, including：

The scheduling is modulated using orthogonal binary phase-shift keying (PSK) QBPSK modulation systems on the working channel First transmission block of information unit and at least one second transmission for repeating the content of first transmission block Block, and first transmission block and at least one second transmission block is sent on the working channel.

Alternatively, as one embodiment, a width of 20MHz of band of the working channel, the sending module 520 Send the corresponding high efficiency signaling B fields of the STA on the working channel in a repetitive fashion The schedule information unit of the special segmentation of HE-SIG-B, including：

The sending module 520 is additionally operable to：

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, the sending module 520 send the corresponding high efficiency signaling B fields of the STA on the working channel in a repetitive fashion The schedule information unit of the special segmentation of HE-SIG-B, including：

It should be understood that AP 500 according to embodiments of the present invention may correspond to holding in the inventive method embodiment Above and other operation of the modules in row main body, and AP 500 and/or function are respectively for reality The corresponding flow process of each method in existing Fig. 5 to Figure 10, for sake of simplicity, will not be described here.

As shown in figure 13, the embodiment of the present invention additionally provides a kind of STA 600, and the STA 600 is in WLAN In communicated on working channel with AP, including：Processor 610, memorizer 620, bus system 630 and transceiver 640.Wherein, processor 610, memorizer 620 and transceiver 640 are by total linear system System 630 is connected, and the memorizer 620 is used for store instruction, and the processor 610 is used for performing the memorizer The instructions of 620 storages, send or receive signal to control transceiver 640；Wherein,

Transceiver 640 is used for：Receive special point of the HE-SIG-B that AP is sent on the working channel Corresponding first transmission block of section；

Processor 610 is used for：

Judge whether first transmission block is repeatedly transmitted；

When first transmission block is repeatedly transmitted, it is determined that repeating at least the one of the content of first transmission block Individual second transmission block, first transmission block and at least one second transmission block constitute the tune being repeatedly transmitted Degree information unit.

It should be understood that in embodiments of the present invention, the processor 610 can be CPU (Central Processing Unit, CPU), the processor 610 can also be other general processors, digital signal Processor (DSP), special IC (ASIC), ready-made programmable gate array (FPGA) or its His PLD, discrete gate or transistor logic, discrete hardware components etc..General place Reason device can be microprocessor or the processor can also be any conventional processor etc..

The memorizer 620 can include read only memory and random access memory, and to processor 610 Provide instruction and data.The a part of of memorizer 620 can also include nonvolatile RAM. For example, memorizer 620 can be with the information of storage device type.

The bus system 630 can also include power bus, controlling bus in addition to including data/address bus With status signal bus in addition etc..But for the sake of for clear explanation, various buses are all designated as into bus in figure System 630.

During realization, each step of said method can be by the integrated of the hardware in processor 610 The instruction of logic circuit or software form is completed.The step of method with reference to disclosed in the embodiment of the present invention Hardware processor can be embodied directly in perform and complete, or with the hardware in processor and software module group Close execution to complete.Software module may be located at random access memory, and flash memory, read only memory only may be programmed Read in the ripe storage medium in this area such as memorizer or electrically erasable programmable memory, depositor. The storage medium is located at memorizer 620, and processor 610 reads the information in memorizer 620, with reference to which The step of hardware completes said method.For avoiding repeating, it is not detailed herein.

Alternatively, as one embodiment, processor 610 judges whether first transmission block is repeatedly passed It is defeated, including：

Alternatively, as one embodiment, receive the AP send on the working channel should Before corresponding first transmission block of special segmentation of HE-SIG-B, transceiver 640 is additionally operable to：

Receive high efficiency signaling A field HE-SIG-A that the AP sends；

Processor 610 is additionally operable to：

Transceiver 640 is additionally operable to：

Processor 610 is additionally operable to：

Processor 610 is when first transmission block is repeatedly transmitted, it is determined that repeating the interior of first transmission block At least one second transmission blocks for holding, including：

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, processor 610 When first transmission block is repeatedly transmitted, it is determined that repeating at least one the of the content of first transmission block Two transmission blocks, including：

Alternatively, as one embodiment, first transmission block and second transmission block are using different What the mapping mode of modulation symbol and data subcarrier was repeated on transmission block.

Alternatively, as one embodiment, first transmission block or the time domain shared by the second transmission block Resource is orthogonal frequency division multiplex OFDM symbol lengths, and shared frequency domain resource is 20MHz.

It should be understood that STA 600 according to embodiments of the present invention may correspond to the STA in the embodiment of the present invention 400, it is possible to corresponding to the corresponding main body performed in method according to embodiments of the present invention, and STA 600 In modules above and other operation and/or function it is each in Fig. 5 to Figure 10 in order to realize respectively The corresponding flow process of individual method, for sake of simplicity, will not be described here.

As shown in figure 14, the embodiment of the present invention additionally provides a kind of AP 700, and the AP 700 is in WLAN In communicated on working channel with STA, including：Processor 710, memorizer 720, total linear system System 730 and transceiver 740.Wherein, processor 710, memorizer 720 and transceiver 740 pass through bus System 730 is connected, and the memorizer 720 is used for store instruction, and the processor 710 is used for performing the storage The instruction of the storage of device 720, sends or receives signal to control transceiver 740；Wherein,

Processor 710 is used for：

Transceiver 740 is used for：

When the SNR of the STA is less than threshold value, the STA is sent on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding HE-SIG-B.

It should be understood that in embodiments of the present invention, the processor 710 can be CPU (Central Processing Unit, CPU), the processor 710 can also be other general processors, digital signal Processor (DSP), special IC (ASIC), ready-made programmable gate array (FPGA) or its His PLD, discrete gate or transistor logic, discrete hardware components etc..General place Reason device can be microprocessor or the processor can also be any conventional processor etc..

The memorizer 720 can include read only memory and random access memory, and to processor 710 Provide instruction and data.The a part of of memorizer 720 can also include nonvolatile RAM. For example, memorizer 720 can be with the information of storage device type.

The bus system 730 can also include power bus, controlling bus in addition to including data/address bus With status signal bus in addition etc..But for the sake of for clear explanation, various buses are all designated as into bus in figure System 730.

During realization, each step of said method can be by the integrated of the hardware in processor 710 The instruction of logic circuit or software form is completed.The step of method with reference to disclosed in the embodiment of the present invention Hardware processor can be embodied directly in perform and complete, or with the hardware in processor and software module group Close execution to complete.Software module may be located at random access memory, and flash memory, read only memory only may be programmed Read in the ripe storage medium in this area such as memorizer or electrically erasable programmable memory, depositor. The storage medium is located at memorizer 720, and processor 710 reads the information in memorizer 720, with reference to which The step of hardware completes said method.For avoiding repeating, it is not detailed herein.

Alternatively, as one embodiment, transceiver 740 is sent out on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding HE-SIG-B of the STA is given, including：

Alternatively, as one embodiment, a width of 20MHz of band of the working channel, transceiver 740 exist Send the tune of the special segmentation of the corresponding HE-SIG-B of the STA on the working channel in a repetitive fashion Degree information unit, including：

Transceiver 740 is additionally operable to：

Alternatively, as one embodiment, the band of the working channel is wider than 20MHz, transceiver 740 Send the special segmentation of the corresponding HE-SIG-B of the STA on the working channel in a repetitive fashion Schedule information unit, including：

It should be understood that AP 700 according to embodiments of the present invention may correspond to the AP 500 in the embodiment of the present invention, And can correspond to perform the corresponding main body in method according to embodiments of the present invention, and in AP 700 Above and other operation of modules and/or function are respectively in order to realize each side in Fig. 5 to Figure 10 The corresponding flow process of method, for sake of simplicity, will not be described here.

Those of ordinary skill in the art are it is to be appreciated that with reference to each of the embodiments described herein description The unit and algorithm steps of example, can be with electronic hardware or the knot of computer software and electronic hardware Close to realize.These functions actually with hardware or software mode performing, depending on the spy of technical scheme Fixed application and design constraint.Professional and technical personnel can use not Tongfang to each specific application Method is realizing described function, but this realizes it is not considered that beyond the scope of this invention.

Those skilled in the art can be understood that, for convenience and simplicity of description, above-mentioned to retouch The specific work process of system, device and the unit stated, may be referred to the correspondence in preceding method embodiment Process, will not be described here.

In several embodiments provided herein, it should be understood that disclosed system, device and Method, can be realized by another way.For example, device embodiment described above is only to show Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing To there is other dividing mode, such as multiple units or component can with reference to or be desirably integrated into another System, or some features can ignore, or do not perform.It is another, it is shown or discussed each other Coupling or direct-coupling or communication connection can be INDIRECT COUPLING by some interfaces, device or unit Or communication connection, can be electrical, mechanical or other forms.

The unit as separating component explanation can be or may not be physically separate, work For the part that unit shows can be or may not be physical location, you can be local to be located at one, Or can also be distributed on multiple NEs.Can select according to the actual needs part therein or Person's whole unit is realizing the purpose of this embodiment scheme.

In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, Can also be that unit is individually physically present, it is also possible to which two or more units are integrated in a list In unit.

If the function is realized and as independent production marketing or use using in the form of SFU software functional unit When, can be stored in a computer read/write memory medium.It is based on such understanding, of the invention The part or the part of the technical scheme that technical scheme is substantially contributed to prior art in other words can To be embodied in the form of software product, the computer software product is stored in a storage medium, Use including some instructions so that computer equipment (can be personal computer, server, or Network equipment etc.) perform all or part of step of each embodiment methods described of the invention.And it is aforesaid Storage medium includes：USB flash disk, portable hard drive, read only memory (Read-Only Memory, ROM), Random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can With the medium of store program codes.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited to In this, any those familiar with the art the invention discloses technical scope in, can be easily Expect change or replacement, should all be included within the scope of the present invention.Therefore, protection of the invention Scope should be defined by scope of the claims.

Claims

1. a kind of method of transmission high efficiency signaling B field HE-SIG-B, it is characterised in that apply institute State the access point AP in the WLAN WLAN of method and site STA is led on working channel Letter, methods described are performed by the STA, including：

Judge whether first transmission block is repeatedly transmitted；

2. method according to claim 1, it is characterised in that the judgement first transmission block Whether it is repeatedly transmitted, including：

3. method according to claim 1 and 2, it is characterised in that receiving the AP in institute Before stating corresponding first transmission block of special segmentation of the HE-SIG-B sent on working channel, institute Stating method also includes：

Receive high efficiency signaling A field HE-SIG-A that the AP sends；

4. method according to claim 1 and 2, it is characterised in that the bandwidth of the working channel It is more than 20MHz, described when first transmission block is repeatedly transmitted, it is determined that repetition first transmission At least one second transmission blocks of the content of block, including：

5. method according to any one of claim 1 to 4, it is characterised in that described first passes Defeated piece and second transmission block are that the mapping mode using different modulation symbols with data subcarrier is being passed Repeated on defeated piece.

6. method according to any one of claim 1 to 5, it is characterised in that described first passes Defeated piece or the time-domain resource shared by second transmission block are that an orthogonal frequency division multiplex OFDM symbol is long Degree, shared frequency domain resource are 20MHz.

7. a kind of method of transmission high efficiency signaling B field HE-SIG-B, it is characterised in that apply institute State the access point AP in the WLAN WLAN of method and site STA is led on working channel Letter, methods described are performed by the AP, including：

8. method according to claim 7, it is characterised in that it is described on the working channel with The mode for repeating sends the schedule information unit of the special segmentation of the corresponding HE-SIG-B of the STA, Including：

9. method according to claim 8, it is characterised in that first transmission block and described Two transmission blocks are that the mapping mode using different modulation symbols with data subcarrier carries out weight on transmission block Multiple.

10. the method according to any one of claim 7 to 9, it is characterised in that the work The a width of 20MHz of band of channel, it is described to send described STA pair on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the HE-SIG-B for answering, including：

Methods described also includes：

11. methods according to any one of claim 7 to 9, it is characterised in that the work The band of channel is wider than 20MHz, described to send the STA on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding HE-SIG-B, including：

12. methods according to claim 8 or claim 9, it is characterised in that first transmission block or Time-domain resource shared by second transmission block be orthogonal frequency division multiplex OFDM symbol lengths, institute The frequency domain resource of occupancy is 20MHz.

A kind of 13. site STAs, it is characterised in that the STA in WLAN WLAN with Access point AP is communicated on working channel, and the STA includes：

14. STA according to claim 13, it is characterised in that the judge module specifically for：

15. STA according to claim 13 or 14, it is characterised in that the receiver module is also For：

The processing module is additionally operable to：

The receiver module is additionally operable to：

The judge module is additionally operable to：

The processing module is additionally operable to：

16. STA according to claim 13 or 14, it is characterised in that the working channel Band is wider than 20MHz, the processing module specifically for：

17. STA according to any one of claim 13 to 16, it is characterised in that described One transmission block and second transmission block are the mapping modes using different modulation symbols with data subcarrier Repeated on transmission block.

18. STA according to any one of claim 13 to 17, it is characterised in that described Time-domain resource shared by one transmission block or second transmission block is an orthogonal frequency division multiplex OFDM symbol Number length, shared frequency domain resource are 20MHz.

A kind of 19. access point AP, it is characterised in that the AP in WLAN WLAN with Site STA is communicated on working channel, and the AP includes：

20. AP according to claim 19, it is characterised in that the sending module is in the work Make on channel, to send the corresponding high efficiency signaling B field HE-SIG-B's of the STA in a repetitive fashion The schedule information unit of special segmentation, including：

21. AP according to claim 20, it is characterised in that first transmission block and described Second transmission block is that the mapping mode using different modulation symbols with data subcarrier is carried out on transmission block Repeat.

22. AP according to any one of claim 19 to 21, it is characterised in that the work The a width of 20MHz of band of channel, the sending module send institute on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding high efficiency signaling B field HE-SIG-B of STA is stated, is wrapped Include：

The sending module is additionally operable to：

23. AP according to any one of claim 19 to 21, it is characterised in that the work The band of channel is wider than 20MHz, and the sending module is sent on the working channel in a repetitive fashion The schedule information unit of the special segmentation of the corresponding high efficiency signaling B field HE-SIG-B of the STA, Including：

24. AP according to claim 20 or 21, it is characterised in that first transmission block or Time-domain resource shared by second transmission block be orthogonal frequency division multiplex OFDM symbol lengths, institute The frequency domain resource of occupancy is 20MHz.