CN107534999A

CN107534999A - A kind of data transmission method and access point, website

Info

Publication number: CN107534999A
Application number: CN201580079245.0A
Authority: CN
Inventors: 丁志明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Chengdu jiaozi Xinxing Financial Investment Group Co.,Ltd.
Priority date: 2015-08-26
Filing date: 2015-08-26
Publication date: 2018-01-02
Anticipated expiration: 2035-08-26
Also published as: CN107534999B; WO2017031731A1

Abstract

The present embodiments relate to wireless communication technology field, more particularly to a kind of data transmission method and access point, website, to the resource shared by the length reduction physics header field of the physics header field by shortening multi-user message, so as to improve data transmission efficiency.In the embodiment of the present invention, AP sends request and sends message, receive clear to send message, the AP positions of the first mark in request sends all first marks of message according to corresponding to the first STA, resource indication information corresponding to the first STA is generated, AP generates multi-user message according to resource indication information and sent.So, the STA positions of the first mark in request sends all first marks of message corresponding to for receiving multi-user message determine resource allocation information corresponding to the STA, so as to make to carry longer STA marks of the prior art in the header field of multi-user message, the length of multi-user information header field is shortened, improves data transmission efficiency.

Description

A kind of data transmission method and access point, website

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of data transmission methods and access point, website.

Background technique

Wireless Fidelity (Wireless Fidelity, abbreviation Wi-Fi) be a kind of IEEE802.11 standard based on Institute of Electrical and Electric Engineers (Institute of Electrical and Electronics Engineers, abbreviation IEEE) wireless local area network technology.It include at present IEEE 802.11g, 802.11n, 802.11ac etc. in the mainstream Wi-Fi technology specification used, wherein the usage amount of 802.11g and 802.11n is being reduced gradually, and the usage amount of 802.11ac is gradually increasing.The terminals such as PC (Personal Computer, abbreviation PC), user equipment (User Equipment, abbreviation UE) are wirelessly formed communication network by the technology.Wi-Fi equipment may include access point (Access Point, abbreviation AP) and user site (Station, abbreviation STA), can be in communication with each other between website and access point.

IEEE802.11g introduces orthogonal frequency division multiplexing (Orthogonal Frequency-Division Multiplexing, abbreviation OFDM) technology in Wi-Fi technology, and defining transmission channel is 20MHz.IEEE802.11ax introduces multi-user (Multiple User, abbreviation MU) orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, abbreviation OFDMA) transmission mechanism, transmission bandwidth is divided to a series of subchannels not overlapped being orthogonal, different subchannel distributions is used to different websites, to realize access point (the Access Point in WLAN, abbreviation AP) after competing to channel, can simultaneously with multiple website (STAtion, abbreviation STA) it is communicated, promote bandwidth resource utilization.

Request in Wi-Fi communication protocol sends (Request To Send, abbreviation RTS)/clear to send (Clear To Send, abbreviation CTS) agreement, is equivalent to a kind of Handshake Protocol, is mainly used to solve the problems, such as " concealed nodes "." concealed nodes " (Hidden Node) for example refers to, AP1 sends signal to STA1, and AP2 does not detect the signal that AP1 is sent to STA1, therefore AP2 may be in AP1 to STA1 Signal is also sent while sending signal, and the signal of AP2 can also reach STA1, cause signal conflict, that is to say, that the signal that AP1 is sent to STA1 is interfered, and the signal that AP1 is sent to STA1 cannot be properly received by eventually leading to STA1." concealed nodes " will bring loss in efficiency, because disturbed message is forced to transmit again, disturbed message is longer, lose bigger.Therefore, to solve the above-mentioned problems, IEEE802.11 provides following solution, and Wi-Fi equipment can start RTS/CTS Handshake Protocol when transmitting longer data packet, transmit data packet again in RTS/CTS interaction success, to reduce loss in efficiency caused by conflict.

After IEEE802.11ax introduces multi-user transmission mechanism; multiuser downstream transmission; that is AP transmits message to multiple STA simultaneously and is also required to similar RTS/CTS transmission protection mechanism, to reduce STA when receiving the descending multi-user message of AP transmission by the probability of other Wi-Fi equipments interference nearby.

Specific message transmission flow are as follows:

AP can send a multi-user and request to send (Multiple User Request To Send, abbreviation MU-RTS) message after competing to channel by broadcast mode or other means.In MU-RTS include the ID of scheduled multiple STA, and is used to indicate out the instruction information that each scheduled STA sends subchannel used in CTS message.MU-RTS indicates that AP will send multi-user message to scheduled multiple STA, and AP transmits data to multiple STA by the multi-user message.

Scheduled STA is after receiving the MU-RTS, and according to the instruction information in MU-RTS, CTS message is sent in the subchannel specified for the STA with OFDMA transmission mechanism.It is ready that CTS message shows that the STA is ready for, and AP can send multi-user message to the STA.Include the temporal information that STA oneself wants busy channel in CTS message, hears that remaining STA and AP of this CTS message then during this period of time avoid to avoid conflict using channel.

After AP receives the CTS message of STA transmission, AP just starts to send multi-user message to the STA.In specific implementation, AP scheduled 5 STA, if 5 STA send CTS message to AP, AP sends multi-user message to 5 STA；If AP only receives part STA, such as the CTS message that 3 STA are sent, then AP only sends CTS message to 3 STA of transmission CTS；If AP does not receive a CTS message, AP abandons this time transmitting, and competitive channel again.

In above- mentioned information transmission process, since RTS/CTS is short frame, data volume is little, if therefore should The failure of class short frame transmission not will cause excessive efficiency waste, and multi-user message is usually long frame, and data volume is larger, if the transmission failure of one long frame, will lead to biggish efficiency waste.Therefore, AP and STA is successfully exchanging RTS/CTS message, that is, completes just to begin through transmission multi-user message after shaking hands to transmit data, to reduce the possibility of long frame transmission failure, avoids excessive failed transmission, improves data transmission efficiency.

AP is to the physical frame of the STA multi-user message sent as shown in Figure 1, including physics header field and data domain.Data field is for carrying the data for being sent to multiple STA, and simultaneous transmission is exactly the data of the multiple STA of simultaneous transmission in different frequency domain resources for OFDMA mechanism in the corresponding resource of the STA by the corresponding data of each STA.It include the domain legacy preamble (Legacy Preamble), efficient signaling A (High Efficient Signal A in physics header field, abbreviation HE-SIG-A) domain, efficient signaling B (High Efficient Signal B, abbreviation HE-SIG-B) domain, the domain efficient Short Training domain/long training domain (High Efficient Short Training Field/Long Training Field, abbreviation HE-STF/LTF).The domain HE-SIG-B of physics header field includes the domain resource allocation (Resource Allocation, abbreviation RA), and the domain RA includes the resource allocation information of scheduled each STA, and RA information indicates STA receives data on which frequency spectrum resource.The domain RA must include the mark (Identifier, abbreviation ID) of each scheduled STA in the prior art.As shown in Figure 1, including the resource allocation information of SA1 mark, STA2 mark, SA3 mark, STA4 mark and the resource allocation information of STA1, the resource allocation information of STA2, the resource allocation information of STA3, STA4.Since the physics header field in multi-user message is transmitted with minimum speed limit, physics header field should be short as far as possible, occupies less resource as far as possible, reduces the length of physics header field in multi-user message by way of the length in the domain RA reducing in the prior art.

A kind of mode for the STA id information indicating the domain RA is the MAC Address using STA, and the MAC Address of STA is 48 bits, since the MAC Address of STA is too long, to cause the length in the domain RA too long.Another way is the id information for indicating STA using the association identification (Association Identifier, abbreviation AID) of STA in the domain RA.AID is that STA is connected to the unique identification in basic service set (Basic Service Set, abbreviation BSS) distributed after AP by AP, because an AP at most allows to access 2007 STA in present specification, AID only needs 11 bits.As it can be seen that the MAC Address of the AID ratio STA of STA is short, but AID is still longer.The third mode is to consider Usually will not be many to the STA for being in fact linked into an AP, therefore indicated in the domain RA using part (Partial) AID of 7-8 bit.But if the STA quantity for being linked into the same AP is excessive, Partial AID cannot uniquely indicate a STA.

Summary of the invention

The embodiment of the present invention provides a kind of data transmission method and access point, website, and the length to the physics header field by shortening multi-user message reduces the occupied resource of physics header field, thus improve data transfer efficiency.

In a first aspect, providing a kind of data transmission method, comprising:

Access point AP sends request and sends message, wherein includes the first identifier of at least one site STA in request transmission message；

AP receives the clear to send message that the first STA is sent；Wherein, the first STA is one at least one STA；

Position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message generates the corresponding resource indication information of the first STA；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA；

AP generates multi-user message according to resource indication information；

AP sends multi-user message.

With reference to first aspect, in the first possible implementation of the first aspect, position of the corresponding first identifier of first STA in all first identifiers that request sends in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of multi-user message.

With reference to first aspect, in the second possible implementation of the first aspect, it further include the second identifier of the first STA in multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that request sends message.

The possible implementation of second with reference to first aspect, in a third possible implementation of the first aspect, the second identifier of the first STA are determined according to any one of following message:

Request sends the number of the quantity for the first identifier for including in message, the STA for sending clear to send message The maximum quantity of amount and the primary schedulable STA of AP.

Any possible implementation into the third possible implementation of first aspect with reference to first aspect, further includes:

The resource indication information of the 2nd STA is set invalid value by AP；

2nd STA is the STA for not sending clear to send message to AP.

It in the fifth possible implementation of the first aspect, in multi-user message further include the second identifier of the 2nd STA in the 4th kind of possible implementation with reference to first aspect；

Further include:

The second identifier of the 2nd STA is set invalid value by AP.

Second aspect provides a kind of data transmission method, comprising:

STA receives the request that access point AP is sent and sends message, wherein includes the first identifier of at least one STA in request transmission message；

STA sends clear to send message to AP；

STA receives the multi-user message that AP is sent；Wherein, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；

Position of the STA according to the first identifier of STA in all first identifiers that request sends message, determines the corresponding resource allocation information of STA, and the data of AP transmission are received in the corresponding resource of resource allocation information.

In conjunction with second aspect, in the first possible implementation of the second aspect, the corresponding resource allocation information of STA is determined in position of the STA according to the first identifier of STA in all first identifiers that request sends message, comprising:

STA determines position of the corresponding first identifier of STA in all first identifiers that request sends message；

STA determines the resource indication information of position consistency of the first identifier of out position and STA in all first identifiers that request sends message, obtains the corresponding resource indication information of STA in all resource indication informations of multi-user message；

STA determines the corresponding resource allocation information of STA according to the corresponding resource indication information of STA.

It in a second possible implementation of the second aspect, in multi-user message further include the second identifier of STA in conjunction with the possible implementation of the first of second aspect or second aspect；The second identifier of STA is used to indicate position of the first identifier of STA in all first identifiers that request sends message；

Position of the STA according to the first identifier of STA in all first identifiers that request sends message, determines the corresponding resource allocation information of STA, comprising:

Position of the STA according to the first identifier of STA in all first identifiers that request sends message, determines the second identifier of STA in multi-user message；

STA determines the corresponding resource allocation information of the second identifier of STA according to the second identifier of the STA determined.

In conjunction with second of possible implementation of second aspect, in the third possible implementation of the second aspect, the second identifier of STA is determined according to any one of following message:

Request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending clear to send message and the primary schedulable STA of AP.

The third aspect provides a kind of access point, comprising:

Transmission unit sends message and multi-user message for transmission request, and request sends the first identifier in message including at least one site STA；

Receiving unit, for receiving the clear to send message of the first STA transmission；Wherein, the first STA is one at least one STA；

Processing unit generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that request sends message, and generates multi-user message according to resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA.

In conjunction with the third aspect, in the first possible implementation of the third aspect, position of the corresponding first identifier of first STA in all first identifiers that request sends in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of multi-user message.

It in the second possible implementation of the third aspect, in multi-user message further include the second identifier of the first STA in conjunction with the third aspect, the second identifier of the first STA is used to indicate the of the first STA Position of one mark in all first identifiers that request sends message.

In conjunction with second of possible implementation of the third aspect, in the third possible implementation of the third aspect, the second identifier of the first STA is determined according to any one of following message:

In conjunction with the third aspect to the third aspect the third possible implementation in any possible implementation, processing unit is also used to:

Invalid value is set by the resource indication information of the 2nd STA；2nd STA is the STA for not sending clear to send message to AP.

It further include the second identifier of the 2nd STA in multi-user message in the 5th kind of possible implementation of the third aspect in the 4th kind of possible implementation in conjunction with the third aspect；

Processing unit is also used to:

Invalid value is set by the second identifier of the 2nd STA.

Fourth aspect provides a kind of website, comprising:

Receiving unit, request for receiving access point AP transmission sends message and multi-user message, wherein, request sends the first identifier in message including at least one site STA, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；And the data that AP is sent are received in the corresponding resource of resource allocation information；

Processing unit determines the corresponding resource allocation information of STA for position of the first identifier according to STA in all first identifiers that request sends message.

In conjunction with fourth aspect, in the first possible implementation of the fourth aspect, processing unit is also used to:

Determine position of the corresponding first identifier of STA in all first identifiers that request sends message；

In all resource indication informations of multi-user message, determines the resource indication information of position consistency of the first identifier of out position and STA in all first identifiers that request sends message, obtain the corresponding resource indication information of STA；

According to the corresponding resource indication information of STA, the corresponding resource allocation information of STA is determined.

It in the second possible implementation of the fourth aspect, in multi-user message further include the second identifier of STA in conjunction with the possible implementation of the first of fourth aspect or fourth aspect；The second identifier of STA is used to indicate position of the first identifier of STA in all first identifiers that request sends message；

Processing unit is also used to:

According to position of the first identifier of STA in all first identifiers that request sends message, the second identifier of STA is determined in multi-user message；

According to the second identifier of the STA determined, the corresponding resource allocation information of the second identifier of STA is determined.

In conjunction with second of possible implementation of fourth aspect, in the third possible implementation of the fourth aspect, the second identifier of STA is determined according to any one of following message:

5th aspect, provides a kind of access point, comprising:

Transmitter sends message and multi-user message for transmission request, and request sends the first identifier in message including at least one site STA；

Receiver, for receiving the clear to send message of the first STA transmission；Wherein, the first STA is one at least one STA；

Processor generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that request sends message, and generates multi-user message according to resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA.

In conjunction with the 5th aspect, in the first possible implementation of the 5th aspect, position of the corresponding first identifier of first STA in all first identifiers that request sends in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of multi-user message.

In conjunction with the 5th aspect, in second of possible implementation of the 5th aspect, it further include the second identifier of the first STA in multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that request sends message.

In conjunction with second of possible implementation of the 5th aspect, in the third possible implementation of the 5th aspect, the second identifier of the first STA is determined according to any one of following message:

In conjunction with the 5th aspect to the 5th aspect the third possible implementation in any possible implementation, processor is also used to:

Invalid value is set by the resource indication information of the 2nd STA；

2nd STA is the STA for not sending clear to send message to AP.

It further include the second identifier of the 2nd STA in multi-user message in the 5th kind of possible implementation of the 5th aspect in the 4th kind of possible implementation in conjunction with the 5th aspect；

Processor is also used to:

Invalid value is set by the second identifier of the 2nd STA.

6th aspect, provides a kind of website, comprising:

Receiver, request for receiving access point AP transmission sends message and multi-user message, wherein, request sends the first identifier in message including at least one site STA, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；And the data that AP is sent are received in the corresponding resource of resource allocation information；

Processor determines the corresponding resource allocation information of STA for position of the first identifier according to STA in all first identifiers that request sends message.

In conjunction with the 6th aspect, in the first possible implementation of the 6th aspect, processor is also used to:

In conjunction with the first possible implementation of the 6th aspect or the 6th aspect, the second of the 6th aspect It further include the second identifier of STA in multi-user message in the possible implementation of kind；The second identifier of STA is used to indicate position of the first identifier of STA in all first identifiers that request sends message；

Processor is also used to:

In conjunction with second of possible implementation of the 6th aspect, in the third possible implementation of the 6th aspect, the second identifier of STA is determined according to any one of following message:

In the embodiment of the present invention, AP sends request and sends message, wherein, request sends the first identifier in message including at least one site STA, receive the clear to send message of the first STA transmission, wherein, first STA is one at least one STA, that is the first STA is that request sends the corresponding STA of first identifier for including in message, position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message, generate the corresponding resource indication information of the first STA, wherein, the corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA, AP generates multi-user message according to resource indication information, and send multi-user message.Since AP generates the corresponding resource indication information of the first STA according to position of the corresponding first identifier of the first STA in all first identifiers that request sends message, therefore the STA for receiving multi-user message determines the corresponding resource allocation information of the STA according to position of the corresponding first identifier in all first identifiers that request sends message, the mode of the corresponding resource allocation information of the STA must be determined according to the mark of the STA in multi-user message by avoiding STA in the prior art, without carrying longer STA mark in the prior art in header field so as to make multi-user message, so as to shorten the length of multi-user information header field, reduce expense required for sending multi-user message, improve data transmission efficiency.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, attached drawing needed in describing below to embodiment is briefly introduced, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without any creative labor, it is also possible to obtain other drawings based on these drawings.

Fig. 1 be background technique in physical frame from AP to the STA multi-user message sent structural schematic diagram；

Fig. 2 is a kind of system structure diagram provided in an embodiment of the present invention；

Fig. 3 is the physical layer architecture schematic diagram that AP and STA carry out data transmission in the embodiment of the present invention；

Fig. 4 is a kind of flow diagram of data transmission method provided in an embodiment of the present invention；

Fig. 5 is the flow diagram of another data transmission method provided in an embodiment of the present invention；

Fig. 6 is a kind of structural schematic diagram of access point provided in an embodiment of the present invention；

Fig. 7 is a kind of structural schematic diagram of website provided in an embodiment of the present invention；

Fig. 8 is the structural schematic diagram of another access point provided in an embodiment of the present invention；

Fig. 9 is the structural schematic diagram of another website provided in an embodiment of the present invention.

Specific embodiment

In order to which the purpose of the present invention, technical solution and beneficial effect is more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.

Fig. 2 illustrates the embodiment of the present invention and is applicable in a kind of system structure diagram, as shown in Fig. 2, an AP201 and multiple STA202 collectively constitute WLAN 200.WLAN 200 is a basic service set (Basic Service Set, abbreviation BSS), and AP201 can be by transmitting data between multiple subchannels and multiple STA202.

In the embodiment of the present invention, it is a media access control (Medium Access Control that the request that AP is sent, which sends message, abbreviation MAC) layer message or physical layer message, preferably MAC layer message, request send include in message multiple STA first identifier.

Fig. 3 is the physical layer architecture schematic diagram that AP and STA carry out data transmission in the embodiment of the present invention, As shown in Figure 3, the channel of 80MHz is divided into four sub-channels, respectively the first subchannel 301 (Sub-channel301), the second subchannel 302 (Sub-channel302), third subchannel 303 (Sub-channel303), the 4th subchannel 304 (Sub-channel304), every sub-channels are 20MHz.AP sends request to STA1, STA2, STA3 and STA4 on the channel of entire 80MHz and sends message; enter STA later and sends clear to send message phase to AP; it avoids interfering when the information that this stage is used to that STA1, STA2, STA3, STA4 to be made to receive downlink data; even if downlink data transmission is protected; AP sends the leading of the resource allocation information including downlink transfer later, so that each STA determines respectively corresponding resource allocation information.The resource allocation information of STA in the embodiment of the present invention can be the resource of STA distribution, which can be in the transmitted over resources information and/or data of the distribution.Specifically, AP sends the corresponding data of the STA to the STA on the corresponding channel resource of each STA, for example, in the 5MHz resource of the first subchannel 301 send STA1 data (STA1 Data) 305, in other 15MHz resources of the first subchannel 301 send STA2 data (STA2 Data) 306, in the second subchannel 302 and the united resource of third subchannel 303 send STA3 data (STA3 Data) 307, in the 4th subchannel 304 send STA4 data (STA4 Data) 308.The channel resource distributed to each STA is related with the size of data to transmit to each STA, and the quantity of the STA once dispatched is uncertain.

Based on above content, Fig. 4 illustrates a kind of flow diagram of data transmission method provided in an embodiment of the present invention.

As shown in figure 4, the embodiment of the present invention provides a kind of data transmission method, comprising:

Step 401, AP sends request and sends message, wherein includes the first identifier of at least one site STA in request transmission message；

Step 402, AP receives the clear to send message that the first STA is sent；Wherein, the first STA is one at least one STA；

Step 403, position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message generates the corresponding resource indication information of the first STA；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA；

Step 404, AP generates multi-user message according to resource indication information；

Step 405, AP sends multi-user message.

The STA that multi-user message is received in the embodiment of the present invention can be according to position of the first identifier of the STA in all first identifiers that request sends message, determine the STA corresponding resource indication information in multi-user message, and the corresponding resource allocation information of the STA is determined according to the corresponding resource indication information of the STA, and the data of AP transmission are received in the corresponding resource of the corresponding resource allocation information of the STA.The resource allocation information of STA in the embodiment of the present invention can be the resource of STA distribution, and the STA and AP can be in the transmitted over resources information and/or data of the distribution.

It include physics header field and data domain in multi-user message in specific implementation.Data field carries the data for being sent to STA, and STA receives the data in the data field for being carried on multi-user message of AP transmission in the corresponding resource of the corresponding resource allocation information of the STA.The legacy preamble part of physics header field can transmit respectively in each 20MHz subchannel, be in time it is parallel, modulated respectively on frequency spectrum.In this way, STA can determine that the legacy preamble is the beginning of a Wi-Fi frame according to the legacy preamble received, and STA knows that this frame will last long.The part HE of physics header field in 802.11ax can modulate respectively in each 20MHz subchannel, can also modulate over the entire channel.Data field includes the corresponding data of STA transmitted on different resource.AP transmits the corresponding data of each STA in the resource distributed for the STA.When resource allocation information is frequency spectrum resource, frequency spectrum resource corresponding to each STA can width can be narrow, determined according to the data volume to be transmitted, such as give STA1 to transmit with 5MHz, with 15MHz to STA2 transmission etc..And according to the distance of each STA distance AP, the rate used when transmitting data to each STA may also be different.

It preferably, include the resource indication information for being used to indicate the corresponding resource allocation information of STA in the physics header field of multi-user message.The corresponding resource indication information of STA can be the corresponding resource allocation information of the STA；Or the resource indication information may indicate that out the information of the corresponding resource allocation information of the STA, such as, a table is preset on AP and STA, the resource indication information can indicate that a resource allocation information group is located at which of the table, later, STA determines the corresponding resource allocation information of the STA according to the resource indication information and oneself position in resource allocation information group from the preset table.The corresponding resource allocation information of one STA is the resource that AP is STA distribution, which receives the data that carry in the data field for the multi-user message that AP is sent in the resource of the distribution.

Specifically, used OFDMA frequency spectrum resource or MU-MIMO spatial flow resource when the resource allocation information in the embodiment of the present invention can send the data field in multi-user message to STA for AP.When AP sends the data field in multi-user message to STA using MU-MIMO technology, since the data transmission of STA is carried out on all channel, AP does not need to give STA designated spectrum resource, but AP need to be STA designated space stream resource etc..

In above-mentioned steps 401, AP establishes connection with multiple STA in advance, a WLAN is formed between AP and multiple STA for establishing connection, AP determines the STA for this time needing to dispatch in the WLAN later, and send request to scheduled multiple STA and send message, which sends the first identifier in message including multiple STA.AP the broadcast transmission request can send message in all subchannels between the AP and STA, can also send the request on each of the sub-channels respectively and send message, request is sent there are many specific sending methods of message, and the embodiment of the present invention is with no restrictions.The working channel of subchannel in the embodiment of the present invention between AP and STA concretely traditional Wi-Fi equipment, such as the Wi-Fi channel of 20MHz.

Request, which sends message, can be MU-RTS frame.It is STA scheduled in this AP that request, which sends STA indicated by the first identifier in message including multiple STA,.The first identifier of STA can be the MAC Address of STA, or since AP is indicated with the part AID, STA AID of STA, if can unique identification go out the STA.

In above-mentioned steps 402, a kind of embodiment is, if AP sends request on a sub-channels and sends message, receives the request and sends the STA of message and send clear to send message to AP on a sub-channels.Such as, AP sends request in the subchannel 1 that a channel width is 20MHz and sends message, that is only one sub-channel width of the width of the working channel of AP, without including more multi sub-channel, and the request is sent only including the first identifier of STA1, STA2 and STA3 in message, then STA1, STA2 and STA3 send clear to send message in subchannel 1.At this point, it can not include the instruction message for being used to indicate out each STA in M STA and sending subchannel used in clear to send message in message that request transmitted by AP, which is sent,.

Another embodiment is, if AP sends request in multiple subchannels and sends message, requesting to send in message should also include being used to indicate out each STA transmission clear to send message in M STA to be made The instruction message of subchannel, AP receive the clear to send message of STA transmission in the corresponding subchannel of STA.Clear to send message can be CTS frame, and the STA that clear to send message is used to indicate to send the clear to send message will be occupied and be sent subchannel used in the clear to send message.

Specifically, it is used to indicate out in M STA mode there are many instruction messages of subchannel used in each STA transmission clear to send message, introduces several preferred embodiments below by way of mode a1, mode a2, mode a3:

Mode a1: being used to indicate out each STA in M STA and sending the instruction message of subchannel used in clear to send message is that STA sends subchannel used in clear to send message.

Such as, it includes following content in message that request, which is sent: STA1 sends clear to send message, STA2 in subchannel 1 and sends clear to send message, STA3 in subchannel 2 sends clear to send message in subchannel 3, then AP is received in subchannel 1 the clear to send message of STA1 transmission, in subchannel 2 the clear to send message of reception STA2 transmission, in subchannel 3 reception STA3 transmission clear to send message.In specific implementation, AP may specify a STA to send clear to send message in multiple subchannels, also may specify that multiple STA send the corresponding clear to send message of each STA on same sub-channels.For example, STA1 sends clear to send message in subchannel 1 and subchannel 2, alternatively, STA1 and STA2 send clear to send message in subchannel 1.

Mode a2: being used to indicate out each STA in M STA and sending the instruction message of subchannel used in clear to send message is the corresponding resource allocation information of STA, or is the corresponding resource indication information of STA.

STA determines that the STA sends subchannel used in clear to send message or STA and determines that the STA sends subchannel used in clear to send message according to the corresponding resource indication information of the STA according to the corresponding resource allocation information of the STA.For example, be located at subchannel 1 by the resource for distributing to STA1 represented by the resource indication information of STA1 or resource allocation information, then STA1 will pass through the corresponding clear to send message of the transmission of subchannel 1 STA1.Alternatively, being located at subchannel 1 by the resource a part for distributing to STA1 represented by the resource indication information of STA1 or resource allocation information, another part is located at subchannel 2, then STA will be by subchannel 1 and subchannel 2 while sending clear to send message.

Mode a3:STA receives the subchannel of multi-user message using multi-user-multiple-input and multiple-output (Multiple User Multiple Input Multiple Output, abbreviation MU-MIMO) technology.

STA sends clear to send information in all subchannels using MU-MIMO technology.For example, AP indicates that STA1 receives downlink data using MU-MIMO technology in subchannel 1 and subchannel 2, then STA1 will be in the clear to send message corresponding with STA1 is sent in subchannel 2 of subchannel 1.Alternatively, AP indicates that STA1 and STA2 receives downlink data using MU-MIMO technology in subchannel 1 and subchannel 2, then STA1 and STA2 will be in the clear to send message corresponding with STA1 and STA2 is sent in subchannel 2 of subchannel 1.

In specific implementation, in order to enable AP to be properly received the clear to send message of STA transmission, and so that other AP or STA is correctly listened to this and understand transmission message, STA can be used identical scrambling code when sending clear to send message and scramble to physical frame, interfere with each other to enable multiple clear to send message on same sub-channels to be correctly superimposed.

In practical application, first identifier corresponding STA in part in all first identifiers for sending and including in message can be can request that because the reason of resource allocation is specified in transmission clear to send message in identical subchannel, therefore this clear to send message has particular/special requirement on physical layer, the physical signal that i.e. multiple STA upload defeated clear to send message in same sub-channels wants completely the same, signal could correctly be superimposed rather than interfere with each other in this way at AP, so that AP can be properly received clear to send message.At this point, a kind of mode is, it is which STA has sent out CTS message, thus can only be considered as STA corresponding to this sub-channels once receiving CTS message in a sub-channels and all have sent CTS message on earth that AP, which may be unaware that on this sub-channels,.Another way is how AP identifies the STA that clear to send message is sent in the subchannel.

In above-mentioned steps 402 and step 403, AP can send position of the first identifier of the corresponding STA of all first identifiers in message in all first identifiers that request sends message according to request, resource indication information is generated, and resource indication information is placed in multi-user message.It can also be after the clear to send message for receiving at least one the first STA transmission, according to position of the corresponding first identifier of each first STA in all first identifiers that request sends message, generate resource indication information, and resource indication information is placed in multi-user message, to generate multi-user message.Wherein, the first STA is at least one STA One, i.e. the first STA be request send message in include the corresponding STA of first identifier.For in above two mode, it can only include the corresponding resource indication information of the first STA in multi-user message, or including the corresponding resource indication information of the first STA and the corresponding resource indication information of the 2nd STA in multi-user message, the corresponding resource indication information of the 2nd STA is set invalid value by AP at this time.2nd STA is that request sends the 2nd STA in the corresponding STA of first identifier for including in message.AP sends multi-user message, STA is received after multi-user message, position of the STA according to the first identifier of the STA in all first identifiers that request sends message, determine STA corresponding resource indication information in multi-user message, and then the STA is according to the corresponding resource indication information of the STA, determine the corresponding resource allocation information of the STA, and the data in the data field in the multi-user message that reception AP is sent in the corresponding resource of the corresponding resource allocation information of the STA.

In above-mentioned steps 403, AP can generate the corresponding resource indication information of the first STA according to position of the corresponding first identifier of the first STA in all first identifiers that request sends message；Another embodiment is, position of the AP not according to the corresponding first identifier of the first STA in all first identifiers that request sends message generates the corresponding resource indication information of the first STA, at this time, position of the STA according to the first identifier of STA in all first identifiers that request sends message, it determines the corresponding resource allocation information of STA, and receives the data of AP transmission in the corresponding resource of resource allocation information.

In above-mentioned steps 404, resource indication information is placed in multi-user message by AP, then generates multi-user message.Had in including in multi-user message there are many form, b1, mode b2 and mode b3 introduce several preferred modes in the following manner in the embodiment of the present invention:

Mode b1 includes at least the second identifier and resource indication information of the first STA in multi-user message.

The second identifier of first STA is used to indicate position of the corresponding first identifier of the first STA in all first identifiers that request sends message.

A kind of preferred embodiment is, for any one STA in the first STA and the 2nd STA, the second identifier and resource indication information of STA is one-to-one relationship, so, the STA can determine the corresponding resource indication information of second identifier of the STA according to the second identifier of the STA, and the STA determines the corresponding resource allocation information of the STA according to the corresponding resource indication information of the STA later.Another preferred embodiment is that a resource indication information has indicated the corresponding resource point of all or multiple STA With the location of information, later, STA sends the position in message in all first identifiers in request according to the first identifier of the STA, determines the corresponding resource allocation information of the STA from the location of resource allocation information indicated by the resource indication information.

It then may include five resource indication informations in multi-user message for example, including the second identifier of five STA in multi-user message, second identifier and resource indication information are one-to-one relationship.Or, such as, a table is preset on AP and STA, the resource indication information can indicate that a resource allocation information group is located at the fifth line in the table, later, position of the STA according to the resource indication information and the first identifier of the STA in all first identifiers that request sends message, determines the corresponding resource allocation information of the STA from the preset table.For convenience of description, it is introduced so that second identifier and resource indication information are one-to-one relationship as an example in following present invention embodiment.

The corresponding first identifier of STA in the embodiment of the present invention in all first identifiers that request sends message position, in particular to the corresponding first identifier of the STA be located in all first identifiers that request sends in message which；Similar, the corresponding resource indication information of the STA is a positioned at which in all resource indication informations in multi-user message in the position, in particular to the corresponding resource indication information of the STA in all resource indication informations of multi-user message.Preferably, position of the second identifier of one STA in all second identifiers, position consistency of the resource indication information corresponding with the STA in all resource indication informations, or position of the second identifier of a STA in all second identifiers, position consistency of the resource allocation information in all resource allocation informations shown in all resource indication information meanings indicated by resource indication information corresponding with the STA.

For example, multi-user message it is leading in include five second identifiers, position of the first identifier of first STA in all first identifiers that request sends in message is first, then the second identifier of the first STA position in five second identifiers is first, and the first the corresponding resource indication information of STA the position in the corresponding resource indication information of five second identifiers be first or the first position of the resource allocation information in the resource allocation information corresponding to five second identifiers indicated by the corresponding resource indication information of STA be first.

In the embodiment of the present invention due to AP send request to send message when, request send include in message multiple STA first identifier, corresponding to the resource indication information in the subsequent transmitted multi-user message of AP In the range of STA must be the STA corresponding to the first identifier in request transmission message, therefore, as long as unique in STA corresponding to multiple first identifiers that the second identifier of the STA in multi-user message includes in request transmission message.It is a very limited value since request sends the quantity of STA corresponding to the first identifier in message, as long as thus can make the second identifier of the STA that there is uniqueness using seldom bit.

For example, AP sends request and sends message, it is STA1 AID, STA2 AID, STA3 AID, STA4 AID that request, which sends and sends sequential in message in request including the first identifier of four STA, first identifier AID, and the first identifier of each STA altogether in message,.As it can be seen that position of the corresponding first identifier STA1AID of STA1 in all first identifiers that request sends message is first；Position of the corresponding first identifier STA2 AID of STA2 in all first identifiers that request sends message is second；Position of the corresponding first identifier STA3 AID of STA3 in all first identifiers that request sends message is third position；Position of the corresponding first identifier STA4 AID of STA4 in all first identifiers that request sends message is the 4th.Alternatively, position of the STA1 AID in all first identifiers that request sends message is zero-bit；Position of the STA2 AID in all first identifiers that request sends message is first；Position of the STA3 AID in all first identifiers that request sends message is second；Position of the STA4 AID in all first identifiers that request sends message is third position.That is, when position of the first identifier of each STA of number in all first identifiers that request sends message, it can be using first as starting, it can also be using zero-bit as starting.Or some particular values of setting, for example, representing whole STA in request transmission message using first as when starting with zero-bit.

For any one STA in the first STA and the 2nd STA, position of the corresponding first identifier of STA in all first identifiers that request sends message is indicated using the second identifier of STA.Second identifier can be indicated with two bits, in this way, then the second identifier of STA1 is 00, the second identifier of STA2 is 01, the second identifier of STA3 is 10, the second identifier of STA4 is 11.As it can be seen that if resource allocation information corresponds to 5-8 STA in multi-user message, three bits are used only in second identifier if two bits are used only in second identifier when resource allocation information corresponds to 4 STA in multi-user message.The occupied bit number of second identifier can send the quantity for the first identifier for including in message according to request to determine, can also be determined according to the maximum quantity of the primary schedulable STA of AP, such as AP is complete 9 STA are once at most dispatched when channel is 20MHz, the occupied bit number of second identifier is then set as 4 fixed bits, or AP once at most dispatches 18 STA when all channel is 40MHz, then the occupied bit number of second identifier is set as 5 fixed bits.

AP and STA can be according to the rule negotiated in advance, and the quantity of STA corresponding to the first identifier for including in message is sent according to request, and AP and STA can determine that request sends the corresponding second identifier of STA for including in message.Uniquely STA is indicated using the second identifier of STA in multi-user transmission message, largely shortens the length of header field in multi-user transmission message.

Include various ways in the specific implementation of aforesaid way b1, introduce several preferred embodiments below by way of mode c1, mode c2 and mode c3:

Mode c1 only includes the second identifier and resource indication information of the first STA in multi-user message.And request to send the quantity for the first identifier for including in message equal with the quantity of STA of clear to send message is sent.

For example, the request that AP is sent sends the first identifier in message including STA1, STA2, STA3 and STA4, later, AP receives the clear to send information that STA1, STA2, STA3 and STA4 are sent respectively, it therefore, include the corresponding second identifier of STA1, STA2, STA3 and STA4 in the multi-user message that AP is sent.

Mode c2, the second identifier and resource indication information of second identifier and resource indication information and the 2nd STA in multi-user message including the first STA, then the second identifier of the 2nd STA and/or resource indication information are set invalid value by AP.Or the second identifier of the second identifier and resource indication information and the 2nd STA in multi-user message including the first STA, then the second identifier of the 2nd STA is set invalid value by AP.Or the resource indication information of the second identifier and resource indication information and the 2nd STA in multi-user message including the first STA.The resource indication information of the 2nd STA is set invalid value by AP.

For example, it includes STA1, STA2, STA3 and STA4 in message that the request that AP is sent, which is sent, probably due to STA2 and STA4 fail, reception request sends message, so that AP be made only to receive the clear to send message that STA1 and STA3 is sent.It include the corresponding resource indication information of STA1, STA2, STA3 and STA4 and STA1, STA2, STA3 and STA4 corresponding in the multi-user message that AP is sent Second identifier.But since AP only receives the clear to send message that STA1 and STA3 is sent, therefore, only STA1 and the corresponding second identifier of STA3 and resource indication information in the multi-user message are virtual value, STA2 and the corresponding second identifier of STA4 and/or resource indication information invalid value.

Mode c3 only includes the second identifier and resource indication information of the first STA in multi-user message.Request sends the quantity for the first identifier for including in message and the quantity of the STA of transmission clear to send message is unequal.

For example, it includes STA1, STA2, STA3 and STA4 in message that the request that AP is sent, which is sent, and still, AP only receives the clear to send message that STA1 and STA3 is sent.At this point, can only include the corresponding second identifier of STA1 and STA3 and resource indication information in the multi-user message that AP is sent, the resource being available can be reassigned to other STA.At this point, the occupied bit number of second identifier can be determined according to the quantity for the STA for sending clear to send message, such as in the example, send clear to send message only there are two STA, then second identifier only takes up a bit.

Mode b2 only includes the corresponding resource indication information of STA in multi-user message, does not include the second identifier of STA for any one STA in the first STA and the 2nd STA.

Since, no longer including the second identifier of STA, the header field of multi-user message is shorter in the domain RA of multi-user message in mode b2.

When only including the corresponding resource indication information of the first STA in multi-user message, need position of the first identifier of any one the first STA in all first identifiers that request sends in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of multi-user message.So, the first STA for receiving multi-user message determines position of the corresponding first identifier of the first STA in the first identifier that request sends message, first STA is in all resource indication informations of multi-user message, determine the resource indication information of position consistency of the first identifier of out position and the first STA in all first identifiers that request sends message, obtain the corresponding resource indication information of the first STA, first STA determines the corresponding resource allocation information of the first STA according to the corresponding resource indication information of the first STA.

For example, it is STA1 AID, STA2 AID, STA3 AID, STA4 AID that request, which sends and sends sequential in message in request including the first identifier of four STA, first identifier AID, and the first identifier of each STA altogether in message,.Then in multi-user message, including the corresponding resource of each STA Indicate information sequential are as follows: the corresponding resource indication information of STA1, the corresponding resource indication information of STA2, the corresponding resource indication information of STA3, the corresponding resource indication information of STA4.The STA3 for receiving multi-user message determines that the first identifier of oneself sends the position in message in request as third, and therefore, STA3 determines the resource indication information of position third, the corresponding resource indication information of as STA3 in multi-user message.

Aforesaid way b2 includes a variety of implementations, introduces several preferred embodiments below by way of mode d1, mode d2 and mode d3:

Mode d1 includes the corresponding resource indication information of the first STA in multi-user message, and requests the quantity for the corresponding STA of resource indication information for including in the quantity and multi-user message that send the first identifier for including in message equal.

For example, the request that AP is sent sends the first identifier in message including STA1, STA2, STA3 and STA4, later, AP receives the clear to send information that STA1, STA2, STA3 and STA4 are sent respectively, it therefore, include the corresponding resource indication information of STA1, STA2, STA3 and STA4 in the multi-user message that AP is sent.

Mode d2, include the corresponding resource indication information of the first STA and the corresponding resource indication information of the 2nd STA in multi-user message, and requests the quantity for the corresponding STA of resource indication information for including in the quantity and multi-user message that send the first identifier for including in message unequal.

At this point, resource allocation information indicated by the corresponding resource indication information of the 2nd STA or the corresponding resource indication information of the 2nd STA in multi-user message is invalid value by AP.

For example, it includes STA1, STA2, STA3 and STA4 in message that the request that AP is sent, which is sent, and AP only receives the clear to send message that STA1 and STA3 is sent.It include the corresponding resource indication information of STA1, STA2, STA3 and STA4 in the multi-user message that AP is sent.But since AP only receives the clear to send message that STA1 and STA3 is sent, therefore, only STA1 and the corresponding resource indication information of STA3 in the multi-user message are that the resource allocation information that virtual value, STA2 and the corresponding resource indication information of STA4 or resource indication information indicate is invalid value.

Mode d3 includes the corresponding resource indication information of the first STA and the corresponding resource indication information of the 2nd STA in multi-user message, and requests to send the quantity and multi-user message for the first identifier for including in message In include the corresponding STA of resource indication information quantity it is unequal.

At this time, for the special STA of position last bit in the first STA, resource allocation information indicated by the corresponding resource indication information of the 2nd STA or the corresponding resource indication information of STA arranged before the special STA is invalid value, and all STA arranged after the special STA are the 2nd STA, therefore, it may not include resource indication information corresponding to all STA arranged after the special STA in multi-user message.

For example, it includes STA1, STA2, STA3 and STA4 in message that the request that AP is sent, which is sent, and AP only receives the clear to send message that STA1 and STA3 is sent.Special STA for position last bit in the first STA is STA3, and therefore, the resource allocation information of the corresponding resource indication information of STA2 or resource indication information instruction before STA3 is invalid value.It does not include resource indication information corresponding to the STA4 after STA3 in multi-user message, under mode d3, it only include the corresponding resource indication information of STA1, STA2, STA3 in multi-user message, and the corresponding resource indication information of STA2 or the resource allocation information of resource indication information instruction are invalid values.

It can be seen that in the embodiment of the present invention from the discussion above, AP sends request and sends message, wherein include the first identifier of multiple site STAs in request transmission message；AP is after the clear to send message for receiving at least one STA transmission, according to position of the corresponding first identifier of each STA of transmission clear to send message in all first identifiers that request sends message, the multi-user message including the corresponding resource allocation information of each STA is generated, AP sends multi-user message to the first STA.So, STA can be then set to determine the STA corresponding resource allocation information in multi-user message according to position of the corresponding first identifier in all first identifiers that request sends message, without carrying longer STA mark in the prior art in header field so as to make multi-user message, so as to shorten the length of multi-user information header field, reduce expense required for sending multi-user message, improves data transmission efficiency.

Fig. 5 illustrates a kind of flow diagram of data transmission method provided in an embodiment of the present invention.

Based on same idea, as shown in figure 5, the embodiment of the present invention provides a kind of data transmission method, comprising:

Step 501, the request that STA receives that access point AP is sent sends message, wherein request, which is sent, to disappear It include the first identifier of at least one STA in breath；

Step 502, STA sends clear to send message to AP；

Step 503, STA receives the multi-user message that AP is sent；Wherein, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；

Step 504, position of the STA according to the first identifier of STA in all first identifiers that request sends message, determines the corresponding resource allocation information of STA, and the data of AP transmission are received in the corresponding resource of resource allocation information.

In above-mentioned steps 502, a kind of embodiment is, if AP sends request on a sub-channels and sends message, receives the request and sends the STA of message and send clear to send message to AP on a sub-channels.Another embodiment is, if AP sends request in multiple subchannels and sends message, then requesting to send should also include the instruction message for being used to indicate out each STA in M STA and sending subchannel used in clear to send message in message, and AP receives the clear to send message of STA transmission in the corresponding subchannel of STA.Clear to send message can be CTS frame, and the STA that clear to send message is used to indicate to send the clear to send message will be occupied and be sent subchannel used in the clear to send message.

Specifically, the instruction message of subchannel used in each STA transmission clear to send message in M STA is used to indicate out there are many mode, and foregoing teachings pass-through mode a1, mode a2, mode a3 introduce several preferred embodiments, and details are not described herein.

Resource indication information is placed in multi-user message by AP, then generates multi-user message.Had in including in multi-user message there are many form, b1, mode b2 and mode b3 introduce several preferred modes through the above way in the embodiment of the present invention, and details are not described herein.

After STA receives multi-user message, it is preferable that determine the corresponding resource allocation information of STA in position of the STA according to the first identifier of STA in all first identifiers that request sends message, comprising:

STA determines out position and the first mark of STA in all resource indication informations of multi-user message The resource indication information for knowing the position consistency in all first identifiers that request sends message, obtains the corresponding resource indication information of STA；

It preferably, further include the second identifier of STA in multi-user message；The second identifier of STA is used to indicate position of the first identifier of STA in all first identifiers that request sends message；

Preferably, the second identifier of STA is determined according to any one of following message:

In the embodiment of the present invention, AP sends request and sends message, wherein, request sends the first identifier in message including at least one site STA, receive the clear to send message of the first STA transmission, wherein, first STA is one at least one STA, position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message, generate the corresponding resource indication information of the first STA, wherein, the corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA, AP generates multi-user message according to resource indication information, and send multi-user message.Since AP generates the corresponding resource indication information of the first STA according to position of the corresponding first identifier of the first STA in all first identifiers that request sends message, therefore the STA for receiving multi-user message determines the corresponding resource allocation information of the STA according to position of the corresponding first identifier in all first identifiers that request sends message, the mode of the corresponding resource allocation information of the STA must be determined according to the mark of the STA in multi-user message by avoiding STA in the prior art, without carrying longer STA mark in the prior art in header field so as to make multi-user message, so as to shorten the length of multi-user information header field, reduce expense required for sending multi-user message, improve data transmission efficiency.

The structure that Fig. 6 illustrates a kind of access point provided in an embodiment of the present invention is intended to.

Based on same idea, as shown in fig. 6, the embodiment of the present invention provides a kind of access point, comprising:

Transmitter 606 sends message and multi-user message for sending request under the control of processor 604, includes the first identifier of at least one site STA in request transmission message；；

Receiver 601, the clear to send message sent for receiving the first STA under the control of processor 604；Wherein, the first STA is one at least one STA；

Processor 604 generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that request sends message, and generates multi-user message according to resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA；

Memory 605, for storing information and data.

Preferably, position of the corresponding first identifier of the first STA in all first identifiers that request sends in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of multi-user message.

It preferably, further include the second identifier of the first STA in multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that request sends message.

Preferably, the second identifier of the first STA is determined according to any one of following message:

It preferably, further include the corresponding resource indication information of the 2nd STA in multi-user message；Wherein, the 2nd STA is the STA that request sends not sent clear to send message in the corresponding STA of first identifier for including in message；

Processor 604, is also used to:

It preferably, further include the second identifier of the 2nd STA in multi-user message；

Processor 604, is also used to:

Invalid value is set by the second identifier of the 2nd STA.

In Fig. 6, bus architecture (is represented) with bus 600, bus 600 may include the bus and bridge of any number of interconnection, and bus 600 will include the one or more processors represented by processor 604 and the various circuits of memory that memory 605 represents link together.Bus 600 can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, and these are all it is known in the art, and therefore, it will not be further described herein.Bus interface 603 provides interface between bus 600 and receiver 601 and transmitter 606.Receiver 601 and transmitter 606 can be an element, are also possible to multiple element, such as multiple receivers and transmitter, provide the unit for communicating over a transmission medium with various other devices.The data handled through processor 604 are transmitted on the radio medium by antenna 602, and further, antenna 602 also receives data and transfers data to processor 604.

Processor 604 is responsible for management bus 600 and common processing, can also provide various functions, including timing, peripheral interface, voltage adjusting, power management and other control functions.And memory 605 can be used for the used data when executing operation of storage processor 604.

Optionally, processor 604 can be CPU (centre buries device), ASIC (Application Specific Integrated Circuit, specific integrated circuit), FPGA (Field-Programmable Gate Array, field programmable gate array) or CPLD (Complex Programmable Logic Device, Complex Programmable Logic Devices).

In the embodiment of the present invention, AP sends request and sends message, wherein, request sends the first identifier in message including at least one site STA, receive the clear to send message of the first STA transmission, wherein, first STA is one at least one STA, position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message, generate the corresponding resource indication information of the first STA, wherein, the corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA, AP generates multi-user message according to resource indication information, and send multi-user message.Since AP generates the corresponding resource indication information of the first STA according to position of the corresponding first identifier of the first STA in all first identifiers that request sends message, the STA of multi-user message is received according to corresponding first mark The position known in all first identifiers that request sends message determines the corresponding resource allocation information of the STA, the mode of the corresponding resource allocation information of the STA must be determined according to the mark of the STA in multi-user message by avoiding STA in the prior art, without carrying longer STA mark in the prior art in header field so as to make multi-user message, so as to shorten the length of multi-user information header field, reduce expense required for sending multi-user message, improves data transmission efficiency.

The structure that Fig. 7 illustrates a kind of website provided in an embodiment of the present invention is intended to.

Based on same idea, as shown in fig. 7, the embodiment of the present invention provides a kind of website, comprising:

Receiver 702, message and multi-user message are sent for receiving the request that access point AP is sent under the control of processor 701, wherein, request sends the first identifier in message including at least one site STA, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；And the data that AP is sent are received in the corresponding resource of resource allocation information；

Transmitter 706, for sending clear to send message to AP under the control of processor 701；

Processor 701 determines the corresponding resource allocation information of STA for position of the first identifier according to STA in all first identifiers that request sends message.

Preferably, processor 701 are also used to:

Processor 701, is also used to:

In Fig. 7, bus architecture (is represented) with bus 700, bus 700 may include the bus and bridge of any number of interconnection, and bus 700 will include the one or more processors represented by general processor 701 and the various circuits of memory that memory 704 represents link together.Bus 700 can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, and these are all it is known in the art, and therefore, it will not be further described herein.Bus interface 703 provides interface between bus 700 and transceiver 702.Transceiver 702 can be an element, is also possible to multiple element, such as multiple receivers and transmitter, provides the unit for communicating over a transmission medium with various other devices.Such as: transceiver 702 receives external data from other equipment.Transceiver 702 is used for that treated that data are sent to other equipment by processor 701.Depending on the property of computing system, user interface 705, such as keypad, display, loudspeaker, microphone, control stick can also be provided.

Processor 701 is responsible for management bus 700 and common processing, such as aforementioned operation general-purpose operating system.And memory 704 can be used for the used data when executing operation of storage processor 701.

Optionally, processor 701 can be CPU, ASIC, FPGA or CPLD.

In the embodiment of the present invention, AP sends request and sends message, wherein, request sends the first identifier in message including at least one site STA, receive the clear to send message of the first STA transmission, wherein, first STA is one at least one STA, position of the AP according to the corresponding first identifier of the first STA in all first identifiers that request sends message, generate the corresponding resource indication information of the first STA, wherein, the corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA, AP generates multi-user message according to resource indication information, and send multi-user message.Since AP generates the corresponding resource indication information of the first STA according to position of the corresponding first identifier of the first STA in all first identifiers that request sends message, the STA for receiving multi-user message determines that the corresponding resource allocation of the STA is believed according to position of the corresponding first identifier in all first identifiers that request sends message Breath, the mode of the corresponding resource allocation information of the STA must be determined according to the mark of the STA in multi-user message by avoiding STA in the prior art, without carrying longer STA mark in the prior art in header field so as to make multi-user message, so as to shorten the length of multi-user information header field, reduce expense required for sending multi-user message, improves data transmission efficiency.

The structure that Fig. 8 illustrates a kind of access point provided in an embodiment of the present invention is intended to.

Based on same idea, as shown in figure 8, the embodiment of the present invention provides a kind of access point, including transmission unit 801, receiving unit 802, processing unit 803:

Transmission unit 801 sends message and multi-user message for transmission request, and request sends the first identifier in message including at least one site STA；

Receiving unit 802, for receiving the clear to send message of the first STA transmission；Wherein, the first STA is one at least one STA；

Processing unit 803 generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that request sends message, and generates multi-user message according to resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA.

Processing unit 803, is also used to:

Invalid value is set by the resource indication information of the 2nd STA；

2nd STA is the STA for not sending clear to send message to AP.

Processing unit 803, is also used to:

Invalid value is set by the second identifier of the 2nd STA.

The structure that Fig. 9 illustrates a kind of website provided in an embodiment of the present invention is intended to.

Based on same idea, as shown in figure 9, the embodiment of the present invention provides a kind of website, including receiving unit 901, transmission unit 902, processing unit 903:

Receiving unit 901, request for receiving access point AP transmission sends message and multi-user message, wherein, request sends the first identifier in message including at least one site STA, multi-user message includes the corresponding resource indication information of STA, and the corresponding resource indication information of STA is used to indicate the corresponding resource allocation information of STA；And the data that AP is sent are received in the corresponding resource of resource allocation information；

Transmission unit 902, for sending clear to send message to AP；

Processing unit 903 determines the corresponding resource allocation information of STA for position of the first identifier according to STA in all first identifiers that request sends message.

Preferably, processing unit 903 are also used to:

Processing unit 903, is also used to:

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

The present invention be referring to according to the method for the embodiment of the present invention, the flowchart and/or the block diagram of equipment (system) and computer program product describes.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine, so that generating by the instruction that computer or the processor of other programmable data processing devices execute for realizing the device for the function of specifying in 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, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications may be made to these embodiments.So it includes preferred embodiment and all change and modification for falling into the scope of the invention that the following claims are intended to be interpreted as.

Obviously, those skilled in the art various changes and modifications can be made to the invention without departing from the spirit and scope of the present invention.If then the invention is also intended to include including these modification and variations in this way, these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology.

Claims

A kind of data transmission method characterized by comprising

Access point AP sends request and sends message, wherein includes the first identifier of at least one site STA in the request transmission message；

The AP receives the clear to send message that the first STA is sent；Wherein, the first STA is one at least one described STA；

Position of the AP according to the corresponding first identifier of the first STA in all first identifiers that the request sends message, generates the corresponding resource indication information of the first STA；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA；

The AP generates multi-user message according to the resource indication information；

The AP sends the multi-user message.
The method as described in claim 1, it is characterized in that, the corresponding first identifier of first STA sends the position in all first identifiers in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of the multi-user message in the request.
The method as described in claim 1, it is characterized in that, it further include the second identifier of the first STA in the multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that the request sends message.
Method as claimed in claim 3, which is characterized in that the second identifier of the first STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending clear to send message and the primary schedulable STA of the AP.
Method as described in Claims 1-4 any claim, which is characterized in that further include:

The resource indication information of the 2nd STA is set invalid value by the AP；

2nd STA is the STA for not sending clear to send message to the AP.
Method as claimed in claim 5, which is characterized in that further include the second identifier of the 2nd STA in the multi-user message；

The method also includes:

The second identifier of the 2nd STA is set invalid value by the AP.
A kind of data transmission method characterized by comprising

Site STA receives the request that access point AP is sent and sends message, wherein includes the first identifier of at least one STA in the request transmission message；

The STA sends clear to send message to the AP；

The STA receives the multi-user message that the AP is sent；Wherein, the multi-user message includes the corresponding resource indication information of the STA, and the corresponding resource indication information of the STA is used to indicate the corresponding resource allocation information of the STA；

Position of the STA according to the first identifier of the STA in all first identifiers that the request sends message, determines the corresponding resource allocation information of the STA, and the data of the AP transmission are received in the corresponding resource of the resource allocation information.
The method of claim 7, which is characterized in that determine the corresponding resource allocation information of the STA in position of the STA according to the first identifier of the STA in all first identifiers that the request sends message, comprising:

The STA determines position of the corresponding first identifier of the STA in all first identifiers that the request sends message；

The STA is in all resource indication informations of the multi-user message, the resource indication information for determining position consistency of the first identifier of out position and the STA in all first identifiers that the request sends message, obtains the corresponding resource indication information of the STA；

The STA determines the corresponding resource allocation information of the STA according to the corresponding resource indication information of the STA.
Method as claimed in claim 7 or 8, which is characterized in that further include the second identifier of the STA in the multi-user message；The second identifier of the STA is used to indicate position of the first identifier of the STA in all first identifiers that the request sends message；

Position of the STA according to the first identifier of the STA in all first identifiers that the request sends message, determines the corresponding resource allocation information of the STA, comprising:

Position of the STA according to the first identifier of the STA in all first identifiers that the request sends message, determines the second identifier of the STA in the multi-user message；

The STA determines the corresponding resource allocation information of the second identifier of the STA according to the second identifier of the STA determined.
Method as claimed in claim 9, which is characterized in that the second identifier of the STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending the clear to send message and the primary schedulable STA of the AP.
A kind of access point characterized by comprising

Transmission unit sends message and multi-user message for transmission request, and the request sends the first identifier in message including at least one site STA；

Receiving unit, for receiving the clear to send message of the first STA transmission；Wherein, the first STA is one at least one described STA；

Processing unit generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that the request sends message, and generates the multi-user message according to the resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA.
Access point as claimed in claim 11, it is characterized in that, the corresponding first identifier of first STA sends the position in all first identifiers in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of the multi-user message in the request.
Access point as claimed in claim 11, it is characterized in that, it further include the second identifier of the first STA in the multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that the request sends message.
Access point as claimed in claim 13, which is characterized in that the second identifier of the first STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending clear to send message and the primary schedulable STA of the AP.
Access point as described in claim 11 to 14 any claim, which is characterized in that the processing unit is also used to:

Invalid value is set by the resource indication information of the 2nd STA；

2nd STA is the STA for not sending clear to send message to the AP.
Access point as claimed in claim 15, which is characterized in that further include the second identifier of the 2nd STA in the multi-user message；

The processing unit, is also used to:

Invalid value is set by the second identifier of the 2nd STA.
A kind of website characterized by comprising

Receiving unit, request for receiving access point AP transmission sends message and multi-user message, wherein, the request sends the first identifier in message including at least one site STA, the multi-user message includes the corresponding resource indication information of the STA, and the corresponding resource indication information of the STA is used to indicate the corresponding resource allocation information of the STA；And the data that the AP is sent are received in the corresponding resource of the resource allocation information；

Transmission unit, for sending clear to send message to the AP；

Processing unit determines the corresponding resource allocation information of the STA for position of the first identifier according to the STA in all first identifiers that the request sends message.
Website as claimed in claim 17, which is characterized in that the processing unit is also used to:

Determine position of the corresponding first identifier of the STA in all first identifiers that the request sends message；

In all resource indication informations of the multi-user message, determines the resource indication information of position consistency of the first identifier of out position and the STA in all first identifiers that the request sends message, obtain the corresponding resource indication information of the STA；

According to the corresponding resource indication information of the STA, the corresponding resource allocation information of the STA is determined.
Website as described in claim 17 or 18, which is characterized in that further include the second identifier of the STA in the multi-user message；The second identifier of the STA is used to indicate the of the STA Position of one mark in all first identifiers that the request sends message；

The processing unit, is also used to:

According to position of the first identifier of the STA in all first identifiers that the request sends message, the second identifier of the STA is determined in the multi-user message；

According to the second identifier of the STA determined, the corresponding resource allocation information of the second identifier of the STA is determined.
Website as claimed in claim 19, which is characterized in that the second identifier of the STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending the clear to send message and the primary schedulable STA of the AP.
A kind of access point characterized by comprising

Transmitter sends message and multi-user message for transmission request, and the request sends the first identifier in message including at least one site STA；

Receiver, for receiving the clear to send message of the first STA transmission；Wherein, the first STA is one at least one described STA；

Processor generates the corresponding resource indication information of the first STA for the position according to the corresponding first identifier of the first STA in all first identifiers that the request sends message, and generates the multi-user message according to the resource indication information；The corresponding resource indication information of first STA is used to indicate the corresponding resource allocation information of the first STA.
Access point as claimed in claim 21, it is characterized in that, the corresponding first identifier of first STA sends the position in all first identifiers in message, position consistency of the resource indication information corresponding with the first STA in all resource indication informations of the multi-user message in the request.
Access point as claimed in claim 21, it is characterized in that, it further include the second identifier of the first STA in the multi-user message, the second identifier of the first STA is used to indicate position of the first identifier of the first STA in all first identifiers that the request sends message.
Access point as claimed in claim 23, which is characterized in that the second identifier of the first STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending clear to send message and the primary schedulable STA of the AP.
Access point as described in claim 21 to 24 any claim, which is characterized in that the processor is also used to:

Invalid value is set by the resource indication information of the 2nd STA；

2nd STA is the STA for not sending clear to send message to the AP.
Access point as claimed in claim 25, which is characterized in that further include the second identifier of the 2nd STA in the multi-user message；

The processor, is also used to:

Invalid value is set by the second identifier of the 2nd STA.
A kind of website characterized by comprising

Receiver, request for receiving access point AP transmission sends message and multi-user message, wherein, the request sends the first identifier in message including at least one site STA, the multi-user message includes the corresponding resource indication information of the STA, and the corresponding resource indication information of the STA is used to indicate the corresponding resource allocation information of the STA；And the data that the AP is sent are received in the corresponding resource of the resource allocation information；

Transmitter, for sending clear to send message to the AP；

Processor determines the corresponding resource allocation information of the STA for position of the first identifier according to the STA in all first identifiers that the request sends message.
Website as claimed in claim 27, which is characterized in that the processor is also used to:

Determine position of the corresponding first identifier of the STA in all first identifiers that the request sends message；

In all resource indication informations of the multi-user message, determines the resource indication information of position consistency of the first identifier of out position and the STA in all first identifiers that the request sends message, obtain the corresponding resource indication information of the STA；

According to the corresponding resource indication information of the STA, the corresponding resource allocation information of the STA is determined.
Website as described in claim 27 or 28, which is characterized in that further include the second identifier of the STA in the multi-user message；The second identifier of the STA is used to indicate position of the first identifier of the STA in all first identifiers that the request sends message；

The processor, is also used to:

According to position of the first identifier of the STA in all first identifiers that the request sends message, the second identifier of the STA is determined in the multi-user message；

According to the second identifier of the STA determined, the corresponding resource allocation information of the second identifier of the STA is determined.
Website as claimed in claim 29, which is characterized in that the second identifier of the STA is determined according to any one of following message:

The request sends the maximum quantity of the quantity for the first identifier for including in message, the quantity for the STA for sending the clear to send message and the primary schedulable STA of the AP.