CN107852674A

CN107852674A - A kind of load information transmission method and device

Info

Publication number: CN107852674A
Application number: CN201580081727.XA
Authority: CN
Inventors: 刘乐; 蓝洲
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2018-03-27
Anticipated expiration: 2035-07-31
Also published as: CN107852674B; WO2017020174A1

Abstract

The present invention, which discloses a kind of load information sending method and device, this method, to be included：Access point AP measures the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP in the range of setting time, wherein, the ratio that frequency space stream utilization rate is used to transmit the maximum space stream that the spatial flow shared by data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；The configured information for indicating the frequency space stream utilization rate is added in load information key element；The load information key element is sent to site STA.Using method and device provided by the invention, STA is it is determined that after the frequency space stream utilization rate of each unit bandwidth channel, it may be determined that available resource, and then determine to need the AP accessed, so as to reach the load between each AP of balance so that resource allocation is more reasonable.

Description

A kind of load information transmission method and device

Technical field

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

Background technique

It is universal with intelligent terminal with the development of mobile internet, data traffic rapid growth.WLAN (Wireless Local Area Network, WLAN) relies on the advantage of high-speed and low cost aspect, becomes one of mobile broadband access technology of mainstream.

Channel bonding (channel bonding) forms continuous 40MHz by main 20MHz channel expansion secondary 20MHz channel in existing 802.11ac, it is further continued for extending the secondary 40MHz channel continuous 80MHz of composition, extension secondary 80MHz channel forms continuous 160MHz or discontinuous 80MHz+80MHz (specific channel bonding structure is as shown in table 1).

Table 1

For the 20/40/80/160/80+80MHz of the channel bonding of 802.11ac, the measurement of the end AP simultaneously sends basic service set (Basic Service Set in beacon (Beacon) frame or probe response (Probe response) frame, BSS) the information loaded, load information element (BSS load element) in existing 802.11ac as shown in table 2, wherein each domain is defined as follows:

Table 2

Element ID: the media access control (MAC) frame (MAC frame) is BSS load element MAC frame for identification；

Length: it is used to indicate the length of the BSS load element MAC frame；

MU-MIMO capable STA count: it is used to indicate the number of users for supporting to receive 801.11ac DL MU-MIMO in the BSS；

Spatial stream underutilization: the spatial flow utilization rate being used to indicate on main 20MHz channel (primary20MHz-channel)；

Observable secondary 20MMHz utilization: it is used to indicate the spatial flow utilization rate (spatial stream utilization) of secondary 20MHz channel；

Observable secondary 40MMHz utilization: it is used to indicate the spatial stream utilization of secondary 40MHz channel；

Observable secondary 80MMHz utilization: it is used to indicate the spatial stream utilization of secondary 80MHz channel；

Wherein spatial stream utilization is defined as:

Wherein, N_{max_SS}Be AP maximum multiplexing fluxion (such as: 8 antenna cases it is lower 8 stream), T_busyIt is according to the time span of clear channel assessment (CCA) (Clear Channel Assessment, the CCA) channel busy determined, T_utilizedDefinition is defined as in the summation of the weighting sending time of all real occupied space streams of the main channelN_ss,iIt is in sending time T_iInterior occupied space fluxion.

In conclusion the availability of frequency spectrum of all 20MHz channels is the same in bandwidth in existing 802.11ac system.So the information of existing BSS load only indicates the availability of frequency spectrum of a 20MHz channel.But orthogonal frequency division multiple access Orthogonal Frequency Division Multiple Access, OFDMA and multi-user multiple input multiple output technology (Multi-User Multiple-Input is supported for 802.11ax system Multiple-Output, MU-MIMO), the availability of frequency spectrum of each 20MHz channel is different in bandwidth, the availability of frequency spectrum of each 20MHz channel can not be effectively indicated using BSS load element as defined in existing 802.11ac system, so as to cause the low problem of resource utilization.

Summary of the invention

The present invention provides a kind of load information transmission method, and it is low that method and apparatus provided by the present invention solve the problems, such as that load information transmission mode in the prior art will lead to resource utilization.

In a first aspect, a kind of load information sending method is provided, this method comprises:

Access point AP measures the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

The instruction information for indicating the frequency space stream utilization rate is added in load information element；

Site STA is sent by the load information element.

It with reference to first aspect, in the first possible implementation, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel；

The secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel Difference of the frequency space stream utilization rate of each 20MHz channel relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel.

It with reference to first aspect, in the second possible implementation, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in the secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel.

It with reference to first aspect, in the third possible implementation, include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the sum frequency spatial flow utilization rate in the setting bandwidth channel；Wherein

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the 40MHz channel Middle main 20MHz channel and secondary 20MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the 40MHz channel respectively；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the secondary 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel.

With reference to first aspect or any one in the first to three kind of possible implementation of first aspect, in the fourth possible implementation, the frequency space stream utilization rate passes through formula

It obtains, wherein N_maxSSIt is the maximum fluxion on each resource units (RU:resource unit), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of clear channel assessment (CCA) (Clear Channel Assessment, CCA) busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is the time span according to the CCA channel busy determined.

Second aspect provides a kind of load information method of reseptance, this method comprises:

Site STA receives the load information element that access point AP is sent；

The STA obtains the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is to divide on the unit bandwidth channel The frequency resource block matched is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP；

The STA flows utilization rate according to the frequency space and determines the AP for needing to access.

It include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel in the first possible implementation, then the instruction information includes: in conjunction with second aspect

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel.

It include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel in the second possible implementation, then the instruction information includes: in conjunction with second aspect

The frequency space stream utilization rate of each 20MHz channel is respectively and main in the secondary 80MHz channel 20MH channel, the difference of the frequency space stream utilization rate of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel.

It include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel in the third possible implementation, then the instruction information includes: in conjunction with second aspect

Flow utilization rate in the frequency space of the main 20MHz channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

In conjunction with any one in the first to three kind of possible implementation of second aspect or second aspect, in the fourth possible implementation, the frequency space stream utilization rate passes through formula

It obtains, wherein N_maxSSIt is the maximum fluxion on each resource units (RU), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is CCA busy time length.

The third aspect provides a kind of access point, which includes:

Measurement module, utilization rate is flowed in the frequency space of each unit bandwidth channel in usable bandwidth for measuring the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

Adding module, for the instruction information for indicating the frequency space stream utilization rate to be added in load information element；

Sending module, for sending site STA for the load information element.

In conjunction with the third aspect, in the first possible implementation, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel Difference of the frequency space stream utilization rate of each 20MHz channel relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel；

It is added in the load information element as instruction information.

In conjunction with the third aspect, in the second possible implementation, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel；

It is added in the load information element as instruction information.

In conjunction with the third aspect, in the third possible implementation, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel and setting bandwidth channel in the usable bandwidth, then the adding module be specifically used for will: utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the secondary 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel；

It is added in the load information element as instruction information.

In conjunction with any one in the first to three kind of possible implementation of the third aspect or the third aspect, in the fourth possible implementation, the measurement module is also used to pass through formula

Obtain the frequency space stream utilization rate, wherein N_maxSSIt is the maximum fluxion on each resource units (RU), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is CCA busy time length.

Fourth aspect provides a kind of website, which includes:

Receiving module, for receiving the load information element of access point AP transmission；

Indicate data obtaining module, for obtaining the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is the unit The frequency resource block distributed on bandwidth channel is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP；

Selecting module determines the AP for needing to access for flowing utilization rate according to the frequency space.

In conjunction with fourth aspect, in the first possible implementation, when the unit bandwidth channel is 20MHz channel, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element: the frequency space stream utilization rate of the main 20MHz channel and the frequency space stream utilization rate of secondary 20MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel；

As the instruction information for indicating the frequency space stream utilization rate.

In conjunction with fourth aspect, in the second possible implementation, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element:

The frequency space stream utilization rate of each 20MHz channel is relative to institute in the secondary 40MHz channel State the difference of the frequency space stream utilization rate of main 20MHz channel and secondary 20MHz channel；

In conjunction with fourth aspect, in the third possible implementation, 19, website as claimed in claim 16, it is characterized in that, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel and setting bandwidth channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element:

Flow utilization rate in the frequency space of the main 20MHz channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 80MHz channel, two 20MHz channels that the difference includes main 20MHz channel in the secondary 80MHz channel, secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel respectively with the average frequency spatial flow utilization rate of the secondary 80MHz channel Make the difference that difference obtains；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel；

One or two of above-mentioned technical proposal at least has the following technical effect that

Using scheme provided by the embodiment of the present invention, AP flows utilization rate to the frequency space that the load information that STA is sent includes each 20MHz channel in bandwidth, overlapping basic service set (OverlapBasicServiceSet between two BSS, OBSS) in region, STA then can be according to load information (load information of the frequency space stream utilization rate including 20MHz channel each in bandwidth) relatively small BSS of selection access load capacity of refinement, the problem of so as to which two BSS laod unbalances are effectively relieved, effectively improve resource utilization.

Detailed description of the invention

Fig. 1 is a kind of flow diagram for load information sending method that the embodiment of the present invention one provides；

Fig. 2 is intensive schematic diagram of a scenario as defined in a kind of 802.11ax；

Fig. 3 is a kind of flow diagram for load information sending method that the embodiment of the present invention five provides；

Fig. 4 is a kind of structural schematic diagram for access point that the embodiment of the present invention six provides；

Fig. 5 is a kind of structural schematic diagram for website that the embodiment of the present invention seven provides；

Fig. 6 is a kind of structural schematic diagram for access point that the embodiment of the present invention eight provides；

Fig. 7 is a kind of structural schematic diagram for website that the embodiment of the present invention nine provides.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, following will be combined with the drawings in the embodiments of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.

The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.

Embodiment one

As shown in Figure 1, the embodiment of the present invention provides a kind of load information sending method, this method is specifically included:

Step 101, access point (Access Point, AP the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP) is measured within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

In this embodiment, the frequency space stream utilization rate of channel is: the ratio for the maximum space stream that the practical the space occupied stream of the channel transmission data and access point are capable of providing.

When the method for the embodiment is applied in WIFI system, based on specific hardware realization, the AP, which is generally distributed using 20MHz as minimum particle size unit, can be used bandwidth, so it may include: main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel that the channel in bandwidth, which can be used,.Then the channel of each 20MHz channel meaning in the embodiment includes: main 20MHz channel, secondary 20MHz channel, 2 20MHz channels (specifically including main 20MHz channel and secondary 20MHz channel) in secondary 40MHz channel, and 4 20MHz channels (specifically including: two 20MHz channels included by the secondary 40MHz channel in main 20MHz channel, secondary 20MHz channel and the secondary 80MHz channel) in secondary 80MHz channel.

In specific use environment, maximum space stream is the maximum space fluxion that transmission antenna and receiving antenna can be distinguished, and is the minimum value of transmission antenna sum and receiving antenna sum.Because agreement generally provides the maximum space stream that can be supported according to the antenna number of AP, the maximum space stream in the example can be with is defined as: the maximum space stream that the antenna of AP can be distinguished.

Step 102, the instruction information for indicating the frequency space stream utilization rate is added in load information element (BSS load element)；

In the prior art, BSS load element can generally carry frequency space stream utilization rate: frequency space stream utilization rate, the frequency space stream utilization rate of the frequency space stream utilization rate of secondary 40MHz channel and secondary 80MHz channel of secondary 20MHz channel.Scheme provided by the embodiment of the present invention, on the basis of utilization rate is flowed in the frequency space carried originally, the channel for being also more than 20MHz to bandwidth does further measurement and instruction, and the frequency space stream utilization rate that bandwidth is more than each 20MHz channel in the channel of 20MHz is indicated.

In this embodiment, in order to carry instruction information, can increase default domain in BSS load element in advance then can directly be added to obtained instruction information in default domain then when needing to indicate information.

Step 103, website (STA) is sent by the load information element.

After website receives instruction information, then the frequency space stream utilization rate of each unit bandwidth channel in bandwidth (such as: 20MHz channel) can be determined according to the instruction information.Because in scheme provided by the embodiment of the present invention, it is supplied to the scheme of the frequency space stream utilization rate parameter of STA compared with the existing technology in further detail, so after STA flows utilization rate in the frequency space for determining each 20MHz channel, it can then determine available resource, and then determine the AP for needing to access.To reach the load balanced between each AP, so that the purpose that resource allocation is more reasonable.

By taking Fig. 2 as an example, under the intensive scene as defined in 802.11ax, STA number of access is significantly more than the 2nd BSS (region 2 in corresponding diagram 2) in first BSS (region 1 in corresponding diagram 2), the load of first BSS is higher than the 2nd BSS, if using the load indication scheme of the prior art, website not can determine that the resource practical efficiency of BSS, so the AP that can cannot correctly intervene, to which the BSS of high load causes STA to wait resource slowly unassigned, and the resource of the BSS of adjacent low-load is not utilized sufficiently.

Using scheme provided by the embodiment of the present invention, AP to the load information that STA is sent include AP The frequency space of each unit bandwidth channel in bandwidth can be used to flow utilization rate, in the region OBSS between two BSS, STA then can be according in the 2nd BSS of load information (frequency space of each unit bandwidth channel in bandwidth can be used to flow utilization rate for AP) selection access of refinement, the problem of so as to which two BSS laod unbalances are effectively relieved, effectively improve resource utilization.

In embodiments of the present invention, which can be arranged a reasonable numerical value according to specific demand.Such as in existing WIFI system, the unit bandwidth channel for meeting hardware realization demand is 20MHz.Below by taking unit bandwidth channel is 20MHz channel as an example, the scheme of being provided for the embodiments of the invention is described further:

In embodiments of the present invention, it can indicate that the frequency space stream utilization rate of each 20MHz channel in bandwidth can be used in AP by different modes, the implementation of several optimizations presented below specifically includes:

Embodiment two

In the embodiment, unit bandwidth channel is 20MHz channel, and can be used in bandwidth includes main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel, then indicates that information includes:

Utilization rate is flowed in the frequency space stream utilization rate of main 20MHz channel and the frequency space of secondary 20MHz channel；

Secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

Specific implementation may is that

The information (realizing that BSS load information element (BSS load element) specific structure of the example approach is as shown in table 3) that default domain is used to carry the frequency space for indicating each 20MHz channel stream utilization rate is set in the BSS load element that 802.11ax system defines, and the definition in each domain is respectively as follows: in the BSS Load Element

Table 3

Element ID: being used to indicate the media access control (MAC) frame (Media Access Control frame, MAC frame) is BSS load element MAC frame；

Length: it is used to indicate the length of the BSS load element MAC frame；

OFDMA/MU-MIMO capable STA count (STA count in corresponding table 3): it is used to indicate the number of users for supporting to receive 801.11ax OFDMA/MU-MIMO in the BSS；

Freq/Spatial utilization over primary CH (primary CH in corresponding table 3): it is used to indicate the frequency space stream utilization rate of main 20MHz channel (primary 20MHz-channel)；

Freq/Spatial utilization over secondary 20MHz CH (secondary20MHz CH in corresponding table 3): it is used to indicate the frequency space stream utilization rate of secondary 20MHz channel (primary 20MHz-channel)；

Freq/Spatial utilization over secondary 40MHz CH (secondary40MHz CH in corresponding table 3): it is used to indicate the frequency space stream utilization rate of secondary 40MHz channel (primary 20MHz-channel)；Wherein, which is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

Freq/Spatial utilization over secondary 80MHz CH (corresponds to secondary in table 3 80MHz CH): it is used to indicate the frequency space stream utilization rate of secondary 80MHz channel (primary 20MHz-channel)；Wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel；

Utilization offset over each 20MHz in secondary 40MHz (20MHz in secondary 40MHz in corresponding table 3): it is used to indicate difference of the frequency space stream utilization rate of each 20MHz channel in secondary 40MHz channel relative to the secondary 40MHz channel average utilization；

In this embodiment, the difference of each 20MHz channel can be indicated with 4 bits, 2 20MHz channels in secondary 40MHz, and difference instruction can be indicated in total with 8 bits (1byte)；

Utilization offset over each 20MHz in secondary 80Hz (20MHz in secondary 80Hz in corresponding table 3): it is used to indicate difference of the frequency space stream utilization rate of each 20MHz channel in secondary 80MHz channel relative to the secondary 80MHz channel average utilization；

In embodiment, the difference of each 20MHz channel is indicated with 4 bits, 4 20MHz channels in secondary 80MHz, and difference indicates 16 bits (4*4bit=16bit=2bytes) in total.In order to further save expense, difference in secondary 80MHz channel instruction granularity increases, can each 20MHz channel 2 bits of difference, the difference of 4 channels 8 bits (1byte) in total；

Wherein, frequency spatial flow utilization rate is an average value in the example, specifically may is that the { RU in bandwidth channel_s,jOn N_ssThe frequency space stream utilization rate that a fluxion calculates the bandwidth channel is average, and specific calculation formula may is that

N_maxSSBe on each resource units (RU) maximum fluxion (such as: 8 antenna cases it is lower 8 stream), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th of chronon segmentation Inherence j-th of RU, T_busyIt is that CCA busy time length (or is called: T_busyIt is the time span according to clear channel assessment (CCA) (Clear Channel Assessment, the CCA) channel busy determined).

In this embodiment, in order to be compatible with the format of original BSS load element, and expense is saved, is embodied in such a way that utilization rate is flowed by difference in the frequency space of each 20MHz channel, in the specific implementation, may is that

One, the difference can be the difference subtracted each other, such as:

The frequency utilization rate difference of each 20MHz channel is that the frequency space stream utilization rate of each 20MHz channel subtracts the absolute difference that the average frequency spatial flow utilization rate of secondary 40MHz channel obtains in secondary 40MHz；The frequency utilization rate difference of each 20MHz channel is that the frequency space stream utilization rate of the 20MHz channel subtracts the absolute difference that the average frequency spatial flow utilization rate of secondary 80MHz channel obtains in secondary 80MHz.

Can specifically indicate the size of absolute value differences according to prespecified granularity, for example be indicated according to 0.0625 for unit granularity, then 4 bit difference value indicating ranges be [- 0.5,0.5).If according to be twice granularity 0.125 for unit granularity expression, 2 bit difference value indicating ranges be similarly [- 0.5,0.5), only precision halves.

Two, difference is also possible to the proportional difference being divided by, such as:

The frequency utilization rate difference of each 20MHz channel is that the frequency space ratio that obtains divided by the average frequency spatial flow utilization rate of secondary 40MHz channel of stream utilization rate of the 20MHz channel is poor in secondary 40MHz；The frequency utilization rate difference of each 20MHz channel is that the frequency space ratio that obtains divided by the average frequency spatial flow utilization rate of secondary 80MHz channel of stream utilization rate of the 20MHz channel is poor in secondary 80MHz.

The size of proportional difference can be specifically indicated according to prespecified granularity, for example it is greater than the multiple of a reference value for the expression of unit granularity according to 1.25 times, and 1/1.25 times represents less than the multiple of a reference value for unit granularity, then 4 bits proportion difference indicating ranges be [0.1,10) times.If indicating the multiple for being greater than a reference value according to being twice 1.5 times of granularity as unit granularity, and 1/1.5 times represents less than the multiple of a reference value for unit granularity, then 2 bits proportion difference indicating ranges be similarly [0.1,10) times, only precision halves.

Embodiment three

In the embodiment, unit bandwidth channel is 20MHz channel, includes main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction information includes:

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel.

In order to using the thinking for the BSS load element for continuing to use traditional 802.11ac as far as possible, in the embodiment, the format of BSS Load Element can be format shown in table 4, wherein domain from left to right is similar with the BSS Load Element's of 802.11ac, wherein each domain is defined as:

Table 4

Element ID: being used to indicate the MAC frame for identification is BSS load element MAC frame；

Length: it is used to indicate the length of the BSS load element MAC frame；

OFDMA/MU-MIMO capable STA count: it is used to indicate the number of users for supporting to receive 801.11ax OFDMA/MU-MIMO in the BSS；

Freq/Spatial utilization over primary CH: it is used to indicate the frequency space stream utilization rate of main 20MHz channel (primary20MHz-channel)；

Freq/Spatial utilization over secondary 20MHz CH: it is used to indicate the frequency space stream utilization rate of secondary 20MHz channel (primary 20MHz-channel)；

Other than domain similar with the BSS load element of 802.11ac above, also adding two domains is respectively:

Utilization offset over each 20MHz in secondary 40MHz: it is used to indicate difference of the frequency space stream utilization rate relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate of each 20MHz channel in secondary 40MHz channel (the frequency space stream utilization rate of 20MHz channel and the frequency space stream utilization rate of main 20MHz channel and secondary 20MHz channel correspond and obtain the difference as difference in secondary 40MHz channel)；The difference of each 20MHz channel is indicated with 4 bits；8 bits (1byte) in total.

Wherein, the secondary 40MHz channel (includes two 20MHz channels in secondary 40MHz channel, the frequency space stream utilization rate of secondary 40MHz_1 and 20MHz channel each in secondary 40MHz_2) may is that relative to the calculation method of the difference (secondary 40MHz_1 corresponding difference 1, secondary 40MHz_2 correspondence difference 2) of the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate

The main 20MHz channel=difference 1 of secondary 40MHz_1-；

Secondary 40MHz_2-secondary 20MHz channel=difference 2.

Utilization offset over each 20MHz in secondary 80Hz: in secondary 80MHz channel each 20MHz channel frequency space stream utilization rate respectively with main 20MH channel, the difference of the frequency space stream utilization rate of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel (the frequency space stream utilization rate of 4 20MHz channels and the frequency space stream utilization rate of two 20MHz channels in main 20MHz channel, secondary 20MHz channel and secondary 40MHz channel correspond and obtain the difference as difference in secondary 80MHz channel)；The difference of each 20MHz channel is indicated with 4 bits, includes 4 20MHz channels, 16 bits (2byte) in total in 80MHz channel.In order to further save expense, difference in the big bandwidth of secondary 80MHz instruction granularity increases, can the difference of each 20MHz channel use 2 bits respectively, The difference of 4 channels 8 bits (1byte) in total.

It (include 4 20MHz channels in secondary 80MHz channel in secondary 80MHz channel, secondary 80MHz_1, secondary 80MHz_2, secondary 80MHz_3 and secondary 80MHz_4) each 20MHz channel frequency space stream utilization rate respectively with main 20MH channel, secondary 20MHz channel, and difference (the corresponding difference 1 of secondary 80MHz_1 of the frequency space stream utilization rate of two 20MHz channels in secondary 40MHz channel, secondary 80MHz_2 corresponds to difference 2, the corresponding difference 4 corresponding with secondary 80MHz_4 of difference 3 of secondary 80MHz_3) calculation method may is that

The main 20MHz channel=difference 1 of secondary 80MHz_1-；

Secondary 80MHz_2-secondary 20MHz channel=difference 2；

Secondary 80MHz_3-secondary 40MHz_1 channel=difference 3；

Secondary 80MHz_4-secondary 40MHz_2 channel=difference 4.

N_maxSSIt is the maximum fluxion on each resource units (RU), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is CCA busy time length.

One, the difference can be the difference subtracted each other, such as:

Main 20MHz channel is individually subtracted in utilization rate in secondary 40MHz channel width on 2 20MHz channels and the frequency space stream utilization rate of secondary 20MHz channel obtains absolute value differences (the frequency space stream utilization rate of 20MHz channel and the frequency space stream utilization rate of main 20MHz channel and secondary 20MHz channel correspond and obtain the difference as difference in secondary 40MHz channel).And in secondary 80MHz channel width 4 20MHz channels utilization rate, main 20MHz channel is individually subtracted, secondary 20MHz channel, the utilization rate of two 20MHz channels obtains absolute value differences (in secondary 80MHz channel in the frequency space stream utilization rate of 4 20MHz channels and main 20MHz channel, secondary 20MHz channel and secondary 40MHz channel the frequency space of two 20MHz channels flow utilization rate one-to-one correspondence obtains the difference as difference) in secondary 40MHz channel.Then indicate the size of absolute value differences according to prespecified granularity, for example indicated according to 0.0625 for unit granularity, then 4 bit difference value indicating ranges be [- 0.5,0.5).If according to be twice granularity 0.125 for unit granularity expression, 2 bit difference value indicating ranges be similarly [- 0.5,0.5), only precision halves.

It is poor (the frequency space stream utilization rate of 20MHz channel and the frequency space stream utilization rate of main 20MHz channel and secondary 20MHz channel correspond and obtain the difference as difference in secondary 40MHz channel) that utilization rate in secondary 40MHz channel width on 2 20MHz channels obtains the ratio that difference obtains divided by the frequency space of main 20MHz channel and secondary 20MHz channel stream utilization rate respectively, and in secondary 80MHz channel width 4 20MHz channels utilization rate, respectively divided by main 20MHz channel, secondary 20MHz channel, the ratio that the utilization rate of two 20MHz channels obtains in secondary 40MHz channel is poor, and (utilization rate and main 20MHz channel are flowed in the frequency space of 4 20MHz channels in secondary 80MHz channel, secondary 20MHz channel with And the frequency space stream utilization rate one-to-one correspondence of two 20MHz channels obtains the difference as difference in secondary 40MHz channel).Then it indicates the size of proportional difference according to prespecified granularity, for example indicates for unit granularity the multiple for being greater than a reference value according to 1.25 times, and the multiple that 1/1.25 times represents less than a reference value for unit granularity, then 4 [0.1,10) again bits proportion difference indicating range is.If indicating the multiple for being greater than a reference value according to being twice 1.5 times of granularity as unit granularity, and 1/1.5 times represents less than the multiple of a reference value for unit granularity, then 2 bits proportion difference indicating ranges be similarly [0.1,10) times, only precision halves.

Example IV

In the embodiment, unit bandwidth channel is 20MHz channel, and is not known in the case where specifically including which channel in bandwidth, can be setting bandwidth channel by uncertain channel setting, then the instruction information may is that

Flow utilization rate in the frequency space of main 20MHz channel；

Set the sum frequency spatial flow utilization rate of bandwidth channel, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the 80MHz channel respectively；The average frequency spatial flow utilization rate of the 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the 80MHz channel.

In order to using the thinking for the BSS load element for continuing to use traditional 802.11ac as far as possible, in the embodiment, the format of BSS Load Element can be set to format shown in table 5, wherein the domain from left to right domain similar with BSS Load Element in 802.11ac is respectively defined as:

Table 5

Element ID: being used to indicate the MAC frame is BSS load element MAC frame

Length: it is used to indicate the length of the BSS load element MAC frame；

Average Freq/Spatial utilization over BW: it is used to indicate the average frequency spatial flow utilization rate of setting bandwidth channel, wherein, which is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Utilization offset over each 20MHz within BW: it is used to indicate difference of the frequency space stream utilization rate of each 20MHz channel in setting bandwidth channel relative to the sum frequency spatial flow utilization rate；Wherein:

If the setting bandwidth channel is 20MHz channel, the difference is 0；It can not then indicate difference, overhead is 0 bit；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；Main 20MHz channel and difference of the secondary 20MHz channel relative to two linear average value are indicated with 4 bits respectively, then 8 bits (1byte) indicate in total；

If bandwidth is 80MHz, main 20MHz channel, and secondary 20MHz channel, and secondary 40MHz channel are contained；Two 20MHz channels that the difference includes main 20MHz channel in the secondary 80MHz channel, secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel.

If bandwidth is 160MHz, contain main 20MHz channel, with secondary 20MHz channel, secondary 40MHz channel, and secondary 80MHz channel, there are 8 20MHz channels, indicate this difference of 8 20MHz channels relative to the linear average value of all channels with 4 bits respectively, then 32 bits (4bytes) indicate in total.In order to be further reduced expense, can the difference of each 20MHz channel indicate 8 channels with 2 bits respectively, 16 bits (2bytes) indicate in total.

In this embodiment, stream utilization rate in frequency space passes through formula

It obtains, wherein N_maxSSIt is the maximum fluxion on each resource units (RU), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe N utilized on interior s-th of chronon segmentation, j-th of the RU in inherence_ssA fluxion, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is CCA busy time length.

In this embodiment, in order to be compatible with the format of original BSS load element, and expense is saved, is embodied in such a way that utilization rate is flowed by difference in the frequency space for setting 20MHz channel in bandwidth channel, in the specific implementation, may is that

The difference for calculating multiple 20MHz channels in spread bandwidth, can be the difference subtracted each other, and then indicate the size of absolute value differences according to prespecified granularity, for example according to 0.0625 be unit granularity Indicate, then 4 bit difference value indicating ranges be [- 0.5,0.5).If according to be twice granularity 0.125 for unit granularity expression, 2 bit difference value indicating ranges be similarly [- 0.5,0.5), only precision halves.

Difference is also possible to the proportional difference being divided by, then the size of proportional difference is indicated according to prespecified granularity, for example it is greater than the multiple of a reference value for the expression of unit granularity according to 1.25 times, and 1/1.25 times represents less than the multiple of a reference value for unit granularity, so 4 bits proportion difference indicating ranges be [0.1,10) times.If indicating the multiple for being greater than a reference value according to being twice 1.5 times of granularity as unit granularity, and 1/1.5 times represents less than the multiple of a reference value for unit granularity, then 2 bits proportion difference indicating ranges be similarly [0.1,10) times, only precision halves.

Embodiment five

As shown in figure 3, the embodiment of the present invention also provides another load information method of reseptance, this method comprises:

Step 301, website (STA) receives the load information element (BSS load element) that access point (AP) is sent；

Step 302, the STA obtains the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

When the method for the embodiment is applied in WIFI system, based on specific hardware realization, the AP, which is generally distributed using 20MHz as minimum particle size unit, can be used bandwidth, so it may include: main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel that the channel in bandwidth, which can be used,.Then the channel of each 20MHz channel meaning in the embodiment includes: main 20MHz channel, secondary 20MHz channel, 2 20MHz channels (specifically including main 20MHz channel and secondary 20MHz channel) in secondary 40MHz channel, and 4 20MHz channels in secondary 80MHz channel (specifically include: main 20MHz Two 20MHz channels included by secondary 40MHz channel in channel, secondary 20MHz channel and the secondary 80MHz channel).

Step 303, the STA flows the determining AP for needing to access of utilization rate according to the frequency space.

Based on specifically indicating information generation type in embodiment two, three and four, STA can be used corresponding mode and obtain frequency space stream utilization rate from the default domain of BSS load element, and scheme provided by embodiment two is selected to elaborate the STA method for obtaining frequency space stream utilization rate below:

STA determines that the frame received is BSS load element MAC frame according to Element ID；

Then the length that Length determines BSS load element MAC frame is obtained；

Freq/Spatial utilization over secondary 20MHz CH, Freq/Spatial utilization over secondary 40MHz CH, Freq/Spatial utilization over secondary 80MHz CH, Utilization offset over each 20MHz in secondary 40MHz and Utilization offset over each 20MHz in secondar are finally obtained according to the length Parameter value in y 80Hz, and indicate according to the side AP known in advance the mode of each 20MHz channel frequency spatial flow utilization rate, each 20MHz channel frequency spatial flow utilization rate is parsed from parameter value.

Wherein, the instruction information in the embodiment of the present invention can be realized by following instance, be specifically included:

One, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space stream utilization rate of main 20MHz channel and the frequency space of secondary 20MHz channel in the bandwidth；

Two, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

It three, include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space of main 20MHz channel in the bandwidth；

The sum frequency spatial flow utilization rate of setting bandwidth channel in the bandwidth, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

In this embodiment, the specific calculating of frequency space stream utilization rate can pass through formula

Embodiment six

As shown in figure 4, the embodiment of the present invention provides a kind of access point, which includes:

Measurement module 401, utilization rate is flowed in the frequency space of each unit bandwidth channel in usable bandwidth for measuring the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

In this embodiment, which is also used to pass through formula

Adding module 402, for the instruction information for indicating the frequency space stream utilization rate to be added in load information element；

Sending module 403, for sending site STA for the load information element.

One, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: flow utilization rate and secondary 20MHz letter in the frequency space of the main 20MHz channel Flow utilization rate in the frequency space in road；

It is added in the load information element as instruction information.

Two, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

It is added in the load information element as instruction information.

Three, include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the adding module be specifically used for will: utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate The linear arithmetic average of utilization rate is flowed for the frequency space of at least one 20MHz channel in the setting bandwidth channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

It is added in the load information element as instruction information.

Embodiment seven

As shown in figure 5, the embodiment of the present invention also provides a kind of website, which includes:

Receiving module 501, for receiving the load information element of access point AP transmission；

Indicate data obtaining module 502, for obtaining the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

Selecting module 503 determines the AP for needing to access for flowing utilization rate according to the frequency space.

In embodiments of the present invention, it can indicate that the frequency space stream utilization rate of each 20MHz channel in bandwidth can be used in AP by different modes, the form for sending frequency space stream utilization rate according to access point is different, instruction data obtaining module in the embodiment can obtain the instruction information by several ways presented below, specifically include:

One, when the unit bandwidth channel is 20MHz channel, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element: the frequency space stream utilization rate of the main 20MHz channel and the frequency space stream utilization rate of secondary 20MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is secondary 80MHz letter The linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in road；

Two, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element:

Three, when the unit bandwidth channel is 20MHz channel, the interior usable bandwidth includes main 20MHz channel and setting bandwidth channel, then the instruction data obtaining module is specifically used for obtaining from the load information element:

Flow utilization rate in the frequency space of the main 20MHz channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

All frequency spaces stream utilization rate in this embodiment can all be obtained by formula once:

Wherein, N_maxSSIt is the maximum fluxion on each resource units (RU), N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th chronon segmentation inherence j-th of RU, T_busyIt is CCA busy time length.

Embodiment eight

As shown in fig. 6, the embodiment of the present invention provides a kind of access point, which includes:

Processor 601, utilization rate is flowed in the frequency space of each unit bandwidth channel in usable bandwidth for measuring the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；And the instruction information that will indicate the frequency space stream utilization rate It is added in load information element；

In this embodiment, which is also used to pass through formula

Transceiver 602, for sending site STA for the load information element.

One, when the unit bandwidth channel is 20MHz channel, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then processor 601 is specifically used for flowing: the frequency space of the main 20MHz channel utilization rate and secondary 20MHz channel Flow utilization rate in frequency space；

It is added in the load information element as instruction information.

Two, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then processor 601 be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

It is added in the load information element as instruction information.

Three, include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then processor 601 be specifically used for will: utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

It is added in the load information element as instruction information.

Embodiment nine

As shown in fig. 7, the embodiment of the present invention also provides a kind of website, which includes:

Transceiver 701, for receiving the load information element of access point AP transmission；

Processor 702, for obtaining the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；And utilization rate is flowed according to the frequency space and determines the AP for needing to access.

In embodiments of the present invention, it can indicate that the frequency space stream utilization rate of each 20MHz channel in bandwidth can be used in AP by different modes, the form for sending frequency space stream utilization rate according to access point is different, processor 702 in the embodiment can obtain the instruction information by several ways presented below, specifically include:

One, when the unit bandwidth channel is 20MHz channel, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the processor 702 is specifically used for obtaining from the load information element: the frequency space stream utilization rate of the main 20MHz channel and the frequency space stream utilization rate of secondary 20MHz channel；

Two, when the unit bandwidth channel is 20MHz channel, the interior usable bandwidth includes main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel, then the processor 702 is specifically used for obtaining from the load information element:

Three, when the unit bandwidth channel is 20MHz channel, the interior usable bandwidth includes main 20MHz channel and setting bandwidth channel, then the processor 702 is specifically used for obtaining from the load information element:

Flow utilization rate in the frequency space of the main 20MHz channel；

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference include in the 40MHz channel main 20MHz channel and secondary 20MHz channel it is fluent with the average frequency space of the 40MHz channel respectively Make the difference that difference obtains with rate；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

Said one or multiple technical solutions in the embodiment of the present application, at least have the following technical effect that:

Due to the application of OFDMA and MU-MIMO in the prior art, the resource block in 20MHz channel less than 20MHz can distribute to multiple user/spatial flows, and the frequency spectrum and space utilization rate of each 20MHz channel are no longer identical, it is necessary to indicate respectively.In scheme provided in an embodiment of the present invention, flow utilization rate in frequency space in the load information that AP is sent to STA including each 20MHz channel, so can then flow utilization rate information according to the frequency space after site STA receives frequency space stream utilization rate information and determine that utilization rate is flowed in the frequency space of each 20MHz channel.Because of scheme provided by the embodiment of the present invention In, the scheme of the frequency space stream utilization rate parameter of STA compared with the existing technology is supplied in further detail, so can then determine available resource, and then determine the AP for needing to access after STA flows utilization rate in the frequency space for determining each 20MHz channel.To reach the load balanced between each AP, so that resource allocation is more reasonable.

Method of the present invention is not limited to embodiment described in specific embodiment, and those skilled in the art obtain other embodiments according to the technique and scheme of the present invention, also belong to the scope of the technical innovation of the present invention.

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 present invention is also intended to include these modifications 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 load information sending method, which is characterized in that this method comprises:

Access point AP measures the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

The instruction information for indicating the frequency space stream utilization rate is added in load information element；

Site STA is sent by the load information element.
The method as described in claim 1, which is characterized in that include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel；

The secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel.
The method as described in claim 1, which is characterized in that when the unit bandwidth channel is 20MHz channel, the interior usable bandwidth includes main 20MHz channel, secondary 20MHz channel, secondary 40MHz letter Road and secondary 80MHz channel, then the instruction information include:

Utilization rate is flowed in the frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in the secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel.
The method as described in claim 1, which is characterized in that include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the sum frequency spatial flow utilization rate in the setting bandwidth channel；Wherein

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

If the setting bandwidth channel is 80MHz channel, the difference includes secondary 80MHz letter Two 20MHz channels that secondary 40MHz channel is included in main 20MHz channel, secondary 20MHz channel and the secondary 80MHz channel in road make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel.
Method as described in Claims 1 to 4 is any, which is characterized in that the frequency space stream utilization rate passes through formula

It obtains, wherein N_maxSSIt is the maximum fluxion on each resource units RU, N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of clear channel assessment (CCA) CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th of chronon segmentation j-th of RU in inherence.
A kind of load information method of reseptance, which is characterized in that this method comprises:

Site STA receives the load information element that access point AP is sent；

The STA obtains the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

The STA flows utilization rate according to the frequency space and determines the AP for needing to access.
Method as claimed in claim 6, which is characterized in that include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

The frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel are flowed Utilization rate；

The secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel.
Method as claimed in claim 6, which is characterized in that include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Utilization rate is flowed in the frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in the secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel.
Method as claimed in claim 6, which is characterized in that include main 20MHz channel and setting bandwidth channel in the usable bandwidth when the unit bandwidth channel is 20MHz channel, then the instruction information includes:

Flow utilization rate in the frequency space of the main 20MHz channel；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate The linear arithmetic average of utilization rate is flowed for the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the sum frequency spatial flow utilization rate in the setting bandwidth channel；Wherein

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the secondary 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel.
Method as described in claim 6~9 is any, which is characterized in that the frequency space stream utilization rate passes through formula

It obtains, wherein N_maxSSIt is the maximum fluxion on each resource units RU, N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of clear channel assessment (CCA) CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th of chronon segmentation j-th of RU in inherence.
A kind of access point, which is characterized in that the access point includes:

Measurement module, utilization rate is flowed in the frequency space of each unit bandwidth channel in usable bandwidth for measuring the AP within the scope of setting time, wherein, stream utilization rate in the frequency space is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

Adding module, for the instruction information for indicating the frequency space stream utilization rate to be added in load information element；

Sending module, for sending site STA for the load information element.
Access point as claimed in claim 11, it is characterized in that, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

The secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel；

It is added in the load information element as instruction information.
Access point as claimed in claim 11, it is characterized in that, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the adding module be specifically used for will: the frequency space stream utilization rate that utilization rate is flowed with secondary 20MHz channel in the frequency space of the main 20MHz channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in the secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel；

It is added in the load information element as instruction information.
Access point as claimed in claim 11, it is characterized in that, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel and setting bandwidth channel in the usable bandwidth, then the adding module be specifically used for will: utilization rate is flowed in the frequency space of main 20MHz channel in the usable bandwidth；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the sum frequency spatial flow utilization rate in the setting bandwidth channel；Wherein

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the secondary 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is the secondary 80MHz The linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in channel；

It is added in the load information element as instruction information.
Access point as described in claim 11~14 is any, which is characterized in that the measurement module is also used to pass through formula

Obtain the frequency space stream utilization rate, wherein N_maxSSIt is the maximum fluxion on each resource units RU, N_RUIt is the resource block number in designated channel, N_ss,s,j,iIt is in i-th of clear channel assessment (CCA) CCA busy time section T_iThe Nss fluxion utilized on interior s-th of chronon segmentation, j-th of the RU in inherence, RU_s,jIt is s-th of chronon segmentation j-th of RU in inherence.
A kind of website, which is characterized in that the website includes:

Receiving module, for receiving the load information element of access point AP transmission；

Indicate data obtaining module, for obtaining the instruction information of instruction frequency space stream utilization rate from the load information element, wherein, frequency space stream utilization rate includes the frequency space stream utilization rate of each unit bandwidth channel in the usable bandwidth of the AP, and described frequency space stream utilization rate is used for transmission the ratio for the maximum space stream that the occupied spatial flow of data is supported relative to the antenna of the AP by the frequency resource block distributed on the unit bandwidth channel；

Selecting module determines the AP for needing to access for flowing utilization rate according to the frequency space.
Website as claimed in claim 16, it is characterized in that, when the unit bandwidth channel is 20MHz channel, it include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element: the frequency space stream utilization rate of the main 20MHz channel and the frequency space stream utilization rate of secondary 20MHz channel；

The secondary 40MHz channel average frequency spatial flow utilization rate and in the secondary 40MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 40MHz channel average utilization；Wherein, the secondary 40MHz channel average frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of 2 20MHz channels in the secondary 40MHz channel；

The average frequency spatial flow utilization rate of the secondary 80MHz channel and in the secondary 80MHz channel each 20MHz channel difference of the frequency space stream utilization rate relative to the secondary 80MHz channel average utilization, wherein, the average frequency spatial flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space stream utilization rate of 4 20MHz channels in the secondary 80MHz channel；

As the instruction information for indicating the frequency space stream utilization rate.
Website as claimed in claim 16, it is characterized in that, when the unit bandwidth channel is 20MHz channel, include main 20MHz channel, secondary 20MHz channel, secondary 40MHz channel and secondary 80MHz channel in the usable bandwidth, then the instruction data obtaining module is specifically used for obtaining from the load information element:

Utilization rate is flowed in the frequency space stream utilization rate of the main 20MHz channel and the frequency space of secondary 20MHz channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the frequency space of the main 20MHz channel and secondary 20MHz channel stream utilization rate in the secondary 40MHz channel；

The frequency space stream utilization rate of each 20MHz channel is respectively with main 20MH channel in the secondary 80MHz channel, and flow the difference of utilization rate for the frequency space of two 20MHz channels in secondary 20MHz channel, and secondary 40MHz channel；

As the instruction information for indicating the frequency space stream utilization rate.
Website as claimed in claim 16, it is characterized in that, when the unit bandwidth channel is 20MHz channel, the interior usable bandwidth includes main 20MHz channel and setting bandwidth channel, then the instruction data obtaining module is specifically used for obtaining from the load information element:

Flow utilization rate in the frequency space of the main 20MHz channel；

The sum frequency spatial flow utilization rate of the setting bandwidth channel, wherein the sum frequency spatial flow utilization rate is that the linear arithmetic average of utilization rate is flowed in the frequency space of at least one 20MHz channel in the setting bandwidth channel；

Difference of the frequency space stream utilization rate of each 20MHz channel relative to the sum frequency spatial flow utilization rate in the setting bandwidth channel；Wherein

If the setting bandwidth channel is 20MHz channel, the difference is 0；

If the setting bandwidth channel is 40MHz channel, the difference includes the difference that main 20MHz channel and secondary 20MHz channel are obtained with the average frequency spatial flow utilization rate of 40MHz channel work difference respectively in the 40MHz channel；The average frequency spatial flow utilization rate of the 40MHz channel is the linear arithmetic average that the frequency space stream utilization rate of utilization rate and secondary 20MHz channel is flowed in the frequency space of main 20MHz channel in the 40MHz channel；

If the setting bandwidth channel is 80MHz channel, the difference includes that main 20MHz channel in the secondary 80MHz channel, two 20MHz channels that secondary 40MHz channel is included in secondary 20MHz channel and the secondary 80MHz channel make the difference that difference obtains with the average frequency spatial flow utilization rate of the secondary 80MHz channel respectively；The average frequency spatial flow utilization rate of the secondary 80MHz channel is that the linear arithmetic average of utilization rate is flowed in the frequency space of 4 20MHz channels in the secondary 80MHz channel；

As the instruction information for indicating the frequency space stream utilization rate.