CN107852674A - A kind of load information transmission method and device - Google Patents

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 load information transmission method and device technical field

The present invention relates to the field of communication technology, in particular to a load information transmission method and device.

Background technique

With the development of the mobile Internet and the popularity of smart terminals, data traffic is increasing rapidly. With the advantages of high speed and low cost, Wireless Local Area Network (WLAN) has become one of the mainstream mobile broadband access technologies.

In the existing 802.11ac, channel bonding (channel bonding) is composed of the main 20MHz channel and the secondary 20MHz channel to form a continuous 40MHz, and then continue to expand the secondary 40MHz channel to form a continuous 80MHz, and the extended secondary 80MHz channel to form a continuous 160MHz or a discontinuous 80MHz+80MHz ( The specific channel bonding structure is shown in Table 1).

Table 1

For 802.11ac channel binding 20/40/80/160/80+80MHz, the AP measures and sends the Basic Service Set (BSS) in the Beacon frame or Probe response frame ) load information, the load information element (BSS load element) in the existing 802.11ac is shown in Table 2, and the definition of each domain is as follows:

Table 2

Element ID: Used to identify that the media access control frame (MAC frame) is a BSS load element MAC frame;

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

MU-MIMO capable STA count: used to indicate the number of users who support receiving 801.11ac DL MU-MIMO in this BSS;

Spatial stream underutilization: used to indicate the spatial stream utilization on the primary 20MHz channel (primary20MHz-channel);

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

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

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

where spatial stream utilization is defined as:

Among them, N _{max_SS} is the maximum number of multiplexed streams of the AP (for example: 8 streams in the case of 8 antennas), T _busy is the length of time that the channel is busy determined according to the clear channel assessment (Clear Channel Assessment, CCA), and T _utilized is defined in The sum of the weighted sending times of all real occupied space streams of the main channel is defined as N _ss,i is the number of occupied streams within this transmission time T _i .

To sum up, in the existing 802.11ac system, all 20MHz channels within the bandwidth have the same spectrum utilization. Therefore, the information of the existing BSS load only indicates the spectrum utilization rate of a 20MHz channel. However, the 802.11ax system supports Orthogonal Frequency Division Multiple Access, OFDMA and Multi-User Multiple-Input Multiple-Output technology (Multi-User Multiple-Input Multiple-Output, MU-MIMO), the spectrum utilization rate of each 20MHz channel within the bandwidth is different, using the BSS load element specified in the existing 802.11ac system cannot effectively represent the spectrum utilization rate of each 20MHz channel, resulting in resource utilization low problem.

Contents of the invention

The present invention provides a load information transmission method, and the method and device provided by the present invention solve the problem of low resource utilization caused by the load information transmission mode in the prior art.

In the first aspect, a method for sending load information is provided, the method including:

The access point AP measures the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within the set time range, where the frequency space flow utilization rate is the frequency resource block allocated on the unit bandwidth channel The ratio of the spatial stream used to transmit data to the maximum spatial stream supported by the antenna of the AP;

adding indication information indicating the utilization rate of the frequency space stream to the load information element;

Send the load information element to the station STA.

With reference to the first aspect, in the first possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instructions above include:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

The average frequency space stream utilization rate of the secondary 80MHz channel and the frequency in the secondary 80MHz channel The difference between the frequency space stream utilization rate of each 20MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the average frequency space stream utilization rate of the secondary 80MHz channel is the frequency space of the four 20MHz channels in the secondary 80MHz channel Linear arithmetic mean of stream utilization.

In combination with the first aspect, in the second possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instructions above include:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

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

In combination with the first aspect, in a third possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel in the available bandwidth;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, then the difference includes the 40MHz channel The difference obtained by making a difference between the main 20MHz channel and the secondary 20MHz channel and the average frequency space flow utilization rate of the 40MHz channel; the average frequency space flow utilization rate of the 40MHz channel is the frequency space flow utilization rate of the main 20MHz channel in the 40MHz channel rate and the linear arithmetic mean of the frequency space stream utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by subtracting the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel.

In combination with the first aspect, or any one of the first to third possible implementations of the first aspect, in a fourth possible implementation, the frequency space stream utilization rate is calculated by the formula

Obtained, where N _maxSS is the maximum number of streams on each resource unit (RU: resource unit), N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the i-th idle channel Evaluation (Clear Channel Assessment, CCA) the number of Nss streams utilized on the jth RU in the sth time subsegment in the busy time period T _i , RU _{s, j} is the jth flow number in the sth time subsegment RU, T _busy is the length of time that the channel is busy according to CCA.

In a second aspect, a method for receiving load information is provided, and the method includes:

The station STA receives the load information element sent by the access point AP;

The STA acquires indication information indicating the frequency space flow utilization rate from the load information element, where the frequency space flow utilization rate includes the frequency space flow utilization rate of each unit bandwidth channel within the usable bandwidth of the AP, and The utilization rate of the frequency space stream is divided on the channel of the unit bandwidth The ratio of the spatial stream occupied by the allocated frequency resource block for data transmission relative to the maximum spatial stream supported by the antenna of the AP;

The STA determines the AP to be accessed according to the utilization rate of the frequency space stream.

With reference to the second aspect, in the first possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instructions above include:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

With reference to the second aspect, in the second possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instructions above include:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

In the secondary 80MHz channel, the frequency space flow utilization rate of each 20MHz channel is different from that of the main 20MH channel, the secondary 20MHz channel, and the difference in frequency space stream utilization of two 20MHz channels in the secondary 40MHz channel.

With reference to the second aspect, in a third possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by subtracting the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel.

In combination with the second aspect, or any one of the first to third possible implementations of the second aspect, in a fourth possible implementation, the frequency space stream utilization rate is calculated by the formula

Obtained, where N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the i-th CCA busy time period T The number of Nss streams utilized on the jth RU in the sth time subsegment within _i , RU _s,j is the jth RU in the sth time subsegment, and T _busy is the length of CCA busy time.

In a third aspect, an access point is provided, and the access point includes:

A measurement module, configured to measure the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within a set time range, wherein the frequency space flow utilization rate is the frequency allocated on the unit bandwidth channel The ratio of the spatial stream occupied by the resource block for data transmission relative to the maximum spatial stream supported by the antenna of the AP;

an adding module, configured to add indication information indicating the utilization rate of the frequency space stream to the load information element;

A sending module, configured to send the load information element to the station STA.

With reference to the third aspect, in the first possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The adding module is specifically used to: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

The average frequency space stream utilization rate of the secondary 80MHz channel and the frequency in the secondary 80MHz channel The difference between the frequency space stream utilization rate of each 20MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the average frequency space stream utilization rate of the secondary 80MHz channel is the frequency space of the four 20MHz channels in the secondary 80MHz channel Linear arithmetic mean of stream utilization;

It is added to the load information element as indication information.

In combination with the third aspect, in the second possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The adding module is specifically used to: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

It is added to the load information element as indication information.

With reference to the third aspect, in a third possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the adding module is specifically used to add : The frequency space flow utilization rate of the main 20MHz channel within the usable bandwidth;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, then the difference includes the 40MHz channel The difference obtained by making a difference between the main 20MHz channel and the secondary 20MHz channel and the average frequency space flow utilization rate of the 40MHz channel; the average frequency space flow utilization rate of the 40MHz channel is the frequency space flow utilization rate of the main 20MHz channel in the 40MHz channel rate and the linear arithmetic mean of the frequency space stream utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel;

It is added to the load information element as indication information.

In combination with the third aspect, or any one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner, the measurement module is also used to pass the formula

Obtain the frequency space flow utilization rate, wherein, N _maxSS is the maximum number of flows on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, and N _{ss, s, j, i} are the The number of Nss streams used on the jth RU in the sth time subsegment of the _i CCA busy time period Ti, RU _{s, j} is the jth RU in the sth time subsegment, T _busy is the length of CCA busy time.

In a fourth aspect, a site is provided, which includes:

A receiving module, configured to receive load information elements sent by the access point AP;

An indication information acquisition module, configured to acquire indication information indicating the frequency space flow utilization rate from the load information element, wherein the frequency space flow utilization rate includes the frequency space flow of each unit bandwidth channel within the usable bandwidth of the AP Utilization rate, and said frequency space stream utilization rate is said unit The ratio of the spatial flow occupied by the frequency resource blocks allocated on the bandwidth channel for data transmission to the maximum spatial flow supported by the antenna of the AP;

A selecting module, configured to determine an AP to be accessed according to the utilization rate of the frequency space stream.

With reference to the fourth aspect, in the first possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instruction information obtaining module is specifically used to obtain from the load information element: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

As indication information indicating the utilization rate of the frequency space stream.

With reference to the fourth aspect, in the second possible implementation manner, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, then the The instruction information obtaining module is specifically used to obtain from the load information elements:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel is relative to the Describe the difference between the frequency space flow utilization ratio of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

With reference to the fourth aspect, in a third possible implementation manner, 19. The station according to claim 16, wherein when the unit bandwidth channel is a 20MHz channel, the usable bandwidth includes the main 20MHz channel and set the bandwidth channel, the instruction information obtaining module is specifically used to obtain from the load information element:

The frequency space flow utilization rate of the main 20MHz channel;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. Average frequency space stream utilization of the channel The difference obtained by making a difference; the average frequency space flow utilization rate of this secondary 80MHz channel is the linear arithmetic mean value of the frequency space flow utilization rate of the 4 20MHz channels in this secondary 80MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

One or both of the above technical solutions have at least the following technical effects:

Using the solution provided by the embodiment of the present invention, the load information sent by the AP to the STA includes the frequency space flow utilization rate of each 20MHz channel within the bandwidth, and the overlapping basic service set (OverlapBasicServiceSet, OBSS) area between the two BSSs STA can choose to access a BSS with a relatively small load according to the detailed load information (including the load information of the frequency space stream utilization rate of each 20MHz channel within the bandwidth), so as to effectively alleviate the problem of unbalanced load between two BSSs. problems, and effectively improve resource utilization.

Description of drawings

FIG. 1 is a schematic flowchart of a load information sending method provided by Embodiment 1 of the present invention;

Figure 2 is a schematic diagram of a dense scene specified by 802.11ax;

FIG. 3 is a schematic flowchart of a load information sending method provided in Embodiment 5 of the present invention;

FIG. 4 is a schematic structural diagram of an access point provided in Embodiment 6 of the present invention;

FIG. 5 is a schematic structural diagram of a site provided by Embodiment 7 of the present invention;

FIG. 6 is a schematic structural diagram of an access point provided in Embodiment 8 of the present invention;

FIG. 7 is a schematic structural diagram of a site provided by Embodiment 9 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without creative efforts all belong to the protection scope of the present invention.

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

As shown in Figure 1, an embodiment of the present invention provides a method for sending load information, which specifically includes:

Step 101, an access point (Access Point, AP) measures the frequency space flow utilization rate of each unit bandwidth channel within the usable bandwidth of the AP within a set time range, wherein the frequency space flow utilization rate is as described The ratio of the spatial stream occupied by the frequency resource block allocated on the unit bandwidth channel for data transmission to the maximum spatial stream supported by the antenna of the AP;

In this embodiment, the frequency space flow utilization rate of the channel is: the ratio of the space flow actually occupied by the data transmitted by the channel to the maximum space flow that the access point can provide.

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically including: the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the secondary 80MHz channel).

In a specific use environment, the maximum spatial stream is the maximum number of spatial streams that can be distinguished between the transmitting antenna and the receiving antenna, and is the minimum value of the total number of transmitting antennas and the total number of receiving antennas. Because the protocol generally specifies the maximum spatial stream that can be supported according to the number of antennas of the AP, the maximum spatial stream in this example can be defined as: the maximum spatial stream that can be distinguished by the antennas of the AP.

Step 102, adding indication information indicating the utilization rate of the frequency space stream to the load information element (BSS load element);

In the prior art, the BSS load element generally carries the frequency space flow utilization rate: the frequency space flow utilization rate of the secondary 20MHz channel, the frequency space flow utilization rate of the secondary 40MHz channel, and the frequency space flow utilization rate of the secondary 80MHz channel. In the solution provided by the embodiment of the present invention, on the basis of the frequency space flow utilization rate originally carried, further measurement and indication are performed on channels with a bandwidth exceeding 20MHz, and the frequency space flow of each 20MHz channel in the channels with a bandwidth exceeding 20MHz Utilization is indicated.

In this embodiment, in order to carry the instruction information, a preset field can be added in advance in the BSS load element, and then when the instruction information is needed, the obtained instruction information can be directly added to the preset field.

Step 103, sending the load information element to the station (STA).

After receiving the indication information, the station may determine the frequency space flow utilization rate of each unit bandwidth channel (for example, a 20 MHz channel) within the bandwidth according to the indication information. Because in the solution provided by the embodiment of the present invention, the frequency space stream utilization rate parameter provided to STA is more detailed than the prior art solution, so after the STA determines the frequency space stream utilization rate of each 20MHz channel, it can determine Available resources, and then determine the need to access the AP. In this way, the load among APs is balanced, and the purpose of resource allocation is more reasonable.

Taking Figure 2 as an example, in the dense scene specified by 802.11ax, the number of access STAs in the first BSS (corresponding to Area 1 in Figure 2) is significantly more than that in the second BSS (corresponding to Area 2 in Figure 2). The load of one BSS is higher than that of the second BSS. If the load indication scheme of the prior art is adopted, the station cannot determine the actual resource utilization rate of the BSS, so it cannot correctly access the AP, so that the high-load BSS causes the STA to wait for resources for a long time. are allocated, but the resources of adjacent low-load BSSs are not fully utilized.

Using the solution provided by the embodiment of the present invention, the load information sent by the AP to the STA includes the AP The frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth. In the OBSS area between two BSSs, the STA can use the detailed load information (the frequency space flow of each unit bandwidth channel within the available bandwidth of the AP) Utilization rate) is selected to be connected to the second BSS, so that the problem of load imbalance between the two BSSs can be effectively alleviated, and the resource utilization rate can be effectively improved.

In the embodiment of the present invention, the unit bandwidth can be set to a reasonable value according to specific requirements. For example, in the existing WIFI system, the unit bandwidth channel that meets the requirements of hardware implementation is 20 MHz. Taking the unit bandwidth channel as an example of a 20MHz channel, the solution provided by the embodiment of the present invention will be further described below:

In the embodiment of the present invention, the frequency space flow utilization rate of each 20MHz channel within the usable bandwidth of the AP can be indicated in different ways. Several optimized implementation methods are provided below, including:

Embodiment two

In this embodiment, the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, and the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space flow utilization rate of the secondary 40MHz channel and the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space flow rate of the secondary 40MHz channel The stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

The specific implementation can be:

Set the preset field in the BSS load element defined by the 802.11ax system to carry information indicating the frequency space stream utilization rate of each 20MHz channel (the specific structure of the BSS load information element (BSS load element) that implements this example solution is shown in Table 3 shown), the definition of each field in the BSS Load Element is:

table 3

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

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

OFDMA/MU-MIMO capable STA count (corresponding to STA count in Table 3): used to indicate the number of users who support receiving 801.11ax OFDMA/MU-MIMO in the BSS;

Freq/Spatial utilization over primary CH (corresponding to primary CH in Table 3): used to indicate the frequency spatial stream utilization rate of the primary 20MHz-channel (primary 20MHz-channel);

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

Freq/Spatial utilization over secondary 40MHz CH (corresponding to secondary40MHz CH in Table 3): used to indicate the frequency space stream utilization rate of the secondary 40MHz channel (primary 20MHz-channel); wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The linear arithmetic average of the frequency space stream utilization ratios of the two 20MHz channels in the secondary 40MHz channel;

Freq/Spatial utilization over secondary 80MHz CH (corresponding to secondary in Table 3 80MHz CH): Used to indicate the frequency space flow utilization rate of the secondary 80MHz channel (primary 20MHz-channel); wherein, the average frequency space flow utilization rate of the secondary 80MHz channel is the frequency space flow of the four 20MHz channels in the secondary 80MHz channel the linear arithmetic mean of utilization;

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

In this embodiment, the difference value of each 20MHz channel can be represented by 4 bits, and for two 20MHz channels in the secondary 40MHz, the difference value indication can be represented by 8 bits (1 byte) in total;

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

In the embodiment, the difference value of each 20MHz channel is represented by 4 bits, and there are 4 20MHz channels in the secondary 80MHz, and the difference value indicates a total of 16 bits (4*4bit=16bit=2bytes). In order to further save overhead, the granularity of the difference indication in the secondary 80MHz channel is increased, and the difference value of each 20MHz channel can use 2 bits, and the difference value of the 4 channels has a total of 8 bits (1 byte);

Wherein, the utilization rate of the frequency space stream in this example is an average value, which can be specifically: calculating the average frequency space stream utilization rate of the bandwidth channel from the number of N _ss streams on {RU _{s, j} } in the bandwidth channel, specifically The calculation formula can be:

N _maxSS is the maximum number of streams on each resource unit (RU) (for example: 8 streams in the case of 8 antennas), N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} are the The number of Nss streams utilized on the jth RU in the sth time subsegment of the _i CCA busy time period Ti, RU _s,j is the jth RU in the sth time subsegment, T _busy is the busy time length of CCA (or called: T _busy is the busy time length of the channel determined according to the clear channel assessment (Clear Channel Assessment, CCA)).

In this embodiment, in order to be compatible with the format of the original BSS load element and save overhead, the utilization rate of the frequency space stream of each 20MHz channel is reflected by the difference. In the specific implementation, it can be:

1. The difference can be the difference obtained by subtraction, for example:

The frequency utilization difference of each 20MHz channel in the secondary 40MHz is the absolute value difference obtained by subtracting the frequency space flow utilization rate of each 20MHz channel from the average frequency space flow utilization of the secondary 40MHz channel; each 20MHz channel in the secondary 80MHz The difference in frequency utilization rate is the absolute value difference obtained by subtracting the average frequency space stream utilization rate of the secondary 80 MHz channel from the frequency space stream utilization rate of the 20 MHz channel.

Specifically, the magnitude of the absolute value difference may be indicated according to a pre-specified granularity. For example, if the unit granularity is 0.0625, then the 4-bit difference indication range is [-0.5, 0.5). If it is represented by the unit granularity of 0.125, which is double the granularity, then the indication range of the 2-bit difference value is also [-0.5,0.5), but the accuracy is halved.

2. The difference can also be the proportional difference obtained by division, for example:

The frequency utilization difference of each 20MHz channel in the secondary 40MHz is the ratio difference obtained by dividing the frequency space flow utilization rate of the 20MHz channel by the average frequency space flow utilization rate of the secondary 40MHz channel; the frequency of each 20MHz channel in the secondary 80MHz The difference in utilization rate is a proportional difference obtained by dividing the frequency space stream utilization rate of the 20 MHz channel by the average frequency space stream utilization rate of the secondary 80 MHz channel.

Specifically, the size of the proportional difference can be indicated according to the pre-specified granularity. For example, 1.25 times the unit granularity indicates a multiple greater than the reference value, and 1/1.25 times the unit granularity indicates a multiple smaller than the reference value. Then the 4-bit proportional difference The indication range is [0.1,10) times. If the unit granularity of 1.5 times the larger granularity represents a multiple greater than the reference value, and 1/1.5 times the unit granularity represents a multiple smaller than the reference value, then the 2-bit proportional difference indication range is also [0.1,10) times, Just halve the precision.

Embodiment three

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

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

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

In order to adopt the idea of using the traditional 802.11ac BSS load element as far as possible, in this embodiment, the format of the BSS Load Element can be the format shown in Table 4, wherein the fields from left to right are similar to those of the BSS Load Element of 802.11ac, where each domain is defined as:

Table 4

Element ID: used to indicate that the MAC frame used to identify it is a BSS load element MAC frame;

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

OFDMA/MU-MIMO capable STA count: used to indicate the number of users who support receiving 801.11ax OFDMA/MU-MIMO in the BSS;

Freq/Spatial utilization over primary CH: Used to indicate the frequency spatial stream utilization rate of the primary 20MHz channel (primary20MHz-channel);

Freq/Spatial utilization over secondary 20MHz CH: Used to indicate the frequency spatial stream utilization rate of the secondary 20MHz channel (primary 20MHz-channel);

In addition to the fields similar to the BSS load element of 802.11ac above, two additional fields are added:

Utilization offset over each 20MHz in secondary 40MHz: used to indicate the difference between the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space stream utilization rate of the main 20MHz channel and secondary 20MHz channel (secondary 40MHz The frequency space flow utilization rate of the 20MHz channel in the channel is one-to-one corresponding to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel to obtain the difference); the difference value of each 20MHz channel is represented by 4 bits; a total of 8 bits (1byte).

Wherein, the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel (the secondary 40MHz channel includes two 20MHz channels, secondary 40MHz_1 and secondary 40MHz_2) is relative to the frequency space flow utilization of the main 20MHz channel and secondary 20MHz channel. The calculation method of the difference value of the rate (secondary 40MHz_1 corresponds to difference 1, and secondary 40MHz_2 corresponds to difference 2) can be:

secondary 40MHz_1 – primary 20MHz channel = difference 1;

Secondary 40MHz_2 – Secondary 20MHz channel = difference 2.

Utilization offset over each 20MHz in secondary 80Hz: The frequency space flow utilization rate of each 20MHz channel in the secondary 80MHz channel is the same as the frequency space flow utilization rate of the main 20MH channel, secondary 20MHz channel, and two 20MHz channels in the secondary 40MHz channel The difference (the frequency space flow utilization ratios of the four 20MHz channels in the sub-80MHz channel and the frequency space flow utilization ratios of the main 20MHz channel, the sub-20MHz channel and the two 20MHz channels in the sub-40MHz channel are one-to-one correspondence to obtain the difference ); the difference value of each 20MHz channel is represented by 4 bits, and the 80MHz channel includes 4 20MHz channels with a total of 16 bits (2byte). In order to further save overhead, the difference indication granularity in the secondary 80MHz large bandwidth is increased, and the difference value of each 20MHz channel can use 2 bits respectively, The difference value of the 4 channels is 8 bits (1 byte) in total.

In the secondary 80MHz channel (the secondary 80MHz channel includes four 20MHz channels, secondary 80MHz_1, secondary 80MHz_2, secondary 80MHz_3 and secondary 80MHz_4), the frequency space flow utilization rate of each 20MHz channel is the same as that of the main 20MH channel, secondary 20MHz channel, and secondary 40MHz The calculation method of the difference between the frequency space flow utilization ratios of two 20MHz channels in the channel (sub-80MHz_1 corresponds to difference 1, sub-80MHz_2 corresponds to difference 2, sub-80MHz_3 corresponds to difference 3 and sub-80MHz_4 corresponds to difference 4) can be :

secondary 80MHz_1 – primary 20MHz channel = difference 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.

Wherein, the utilization rate of the frequency space stream in this example is an average value, which can be specifically: calculating the average frequency space stream utilization rate of the bandwidth channel from the number of N _ss streams on {RU _{s, j} } in the bandwidth channel, specifically The calculation formula can be:

N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _ss,s,j,i are the i-th CCA busy time period T _i The number of Nss streams utilized on the jth RU in the s time sub-segment, RU _s,j is the jth RU in the s time subsegment, and T _busy is the length of the CCA busy time.

In this embodiment, in order to be compatible with the format of the original BSS load element and save overhead, the utilization rate of the frequency space stream of each 20MHz channel is reflected by the difference. In the specific implementation, it can be:

1. The difference can be the difference obtained by subtraction, for example:

Subtract the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel from the utilization rates of the two 20MHz channels within the secondary 40MHz channel bandwidth to obtain the absolute value difference (the frequency space flow utilization rate of the 20MHz channel in the secondary 40MHz channel and the main 20MHz channel The frequency space stream utilization ratio of the channel and the secondary 20MHz channel is one-to-one correspondence to obtain the difference). And the utilization rate of 4 20MHz channels in sub-80MHz channel bandwidth, respectively subtract main 20MHz channel, sub-20MHz channel, utilization rate of two 20MHz channels in sub-40MHz channel to get absolute value difference (four 20MHz channels in sub-80MHz channel The frequency space stream utilization rate of the frequency space stream and the frequency space stream utilization rate of the main 20MHz channel, the secondary 20MHz channel and the secondary 40MHz channel are one-to-one correspondingly made a difference to obtain the difference). Then indicate the magnitude of the absolute value difference according to a pre-specified granularity, for example, according to the unit granularity of 0.0625, then the indication range of the 4-bit difference value is [-0.5, 0.5). If it is represented by the unit granularity of 0.125, which is double the granularity, then the indication range of the 2-bit difference value is also [-0.5,0.5), but the accuracy is halved.

2. The difference can also be the proportional difference obtained by division, for example:

The utilization rate of the two 20MHz channels in the sub-40MHz channel bandwidth is divided by the frequency space flow utilization rate of the main 20MHz channel and the sub-20MHz channel to obtain the difference (the frequency space flow utilization rate of the 20MHz channel in the sub-40MHz channel and The frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel is one-to-one correspondence to get the difference), and the utilization rate of the four 20MHz channels in the secondary 80MHz channel bandwidth is divided by the main 20MHz channel, the secondary 20MHz channel, and the secondary 20MHz channel respectively. The ratio difference obtained by the utilization of two 20MHz channels in a 40MHz channel (the frequency space flow utilization rate of the four 20MHz channels in the secondary 80MHz channel and the frequency space flow of the main 20MHz channel, the secondary 20MHz channel, and the two 20MHz channels in the secondary 40MHz channel One-to-one correspondence of utilization rate to obtain the difference). Then indicate the size of the proportional difference according to the pre-specified granularity. For example, 1.25 times the unit granularity means a multiple greater than the benchmark value, and 1/1.25 times the unit granularity means a multiple smaller than the benchmark value. Then 4 The indication range of the bit ratio difference is [0.1,10) times. If the unit granularity of 1.5 times the larger granularity represents a multiple greater than the reference value, and 1/1.5 times the unit granularity represents a multiple smaller than the reference value, then the 2-bit proportional difference indication range is also [0.1,10) times, Just halve the precision.

Embodiment Four

In this embodiment, the unit bandwidth channel is a 20MHz channel, and when it is uncertain which channels are included in the bandwidth, the uncertain channel can be set as the set bandwidth channel, then the indication information can be:

Frequency space flow utilization of the main 20MHz channel;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the 80MHz channel, the secondary 20MHz channel and the two 20MHz channels contained in the secondary 40MHz channel in the secondary 80MHz channel and the 80MHz channel respectively. The difference obtained by subtracting the average frequency space stream utilization rate; the average frequency space stream utilization rate of the 80MHz channel is the linear arithmetic mean value of the frequency space stream utilization rates of the four 20MHz channels in the 80MHz channel.

In order to adopt the idea of using the traditional 802.11ac BSS load element as much as possible, in this embodiment, the format of the BSS Load Element can be set to the format shown in Table 5, wherein the fields from left to right are similar to the BSS Load Element in 802.11ac Domains are defined as:

table 5

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

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

OFDMA/MU-MIMO capable STA count: used to indicate the number of users who support receiving 801.11ax OFDMA/MU-MIMO in the BSS;

Average Freq/Spatial utilization over BW: Used to indicate the average frequency space stream utilization rate of the set bandwidth channel, where the average frequency space stream utilization rate is the frequency space stream utilization rate of at least one 20MHz channel within the set bandwidth channel The linear arithmetic mean of ;

Utilization offset over each 20MHz within BW: It is used to indicate the difference between the frequency space flow utilization rate of each 20MHz channel within the set bandwidth channel relative to the total frequency space flow utilization rate; where:

If the set bandwidth channel is a 20MHz channel, the difference value is 0; then the difference value may not be indicated, and the extra overhead is 0 bits;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean value of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the two linear averages, then a total of 8 bits (1byte) representation;

If the bandwidth is 80MHz, it includes the main 20MHz channel, the secondary 20MHz channel, and the secondary 40MHz channel; the difference includes the primary 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel, and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making a difference between the two 20MHz channels and the average frequency space flow utilization rate of the secondary 80MHz channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the frequency space flow utilization rate of the four 20MHz channels in the secondary 80MHz channel The linear arithmetic mean of the rate.

If the bandwidth is 160MHz, including the main 20MHz channel, the secondary 20MHz channel, the secondary 40MHz channel, and the secondary 80MHz channel, there are 8 20MHz channels, and 4 bits are used to represent the difference between the 8 20MHz channels and the linear average of all channels. value, then a total of 32 bits (4bytes) representation. In order to further reduce the overhead, the difference of each 20 MHz channel can be represented by 2 bits to represent 8 channels, and a total of 16 bits (2 bytes) are represented.

In this embodiment, the frequency space stream utilization is calculated by the formula

Obtained, where N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the i-th CCA busy time period T The number of N _ss streams utilized on the jth RU in the sth time subsegment of _i , RU _s,j is the jth RU in the sth time subsegment, and T _busy is the length of CCA busy time.

In this embodiment, in order to be compatible with the format of the original BSS load element and save overhead, the utilization rate of the frequency space stream of the 20MHz channel in the set bandwidth channel is reflected by the difference. In the specific implementation, it can be:

Calculate the difference of multiple 20MHz channels in the extended bandwidth, which can be the difference obtained by subtraction, and then indicate the size of the absolute value difference according to the pre-specified granularity, such as 0.0625 as the unit granularity Indicates that the 4-bit difference indicates that the range is [-0.5,0.5). If it is represented by the unit granularity of 0.125, which is double the granularity, then the indication range of the 2-bit difference value is also [-0.5,0.5), but the accuracy is halved.

The difference can also be the proportional difference obtained by division, and then indicate the size of the proportional difference according to the pre-specified granularity. For example, 1.25 times the unit granularity indicates a multiple greater than the reference value, and 1/1.25 times the unit granularity. is less than a multiple of the reference value, then the 4-bit proportional difference indicates that the range is [0.1, 10) times. If the unit granularity of 1.5 times the larger granularity represents a multiple greater than the reference value, and 1/1.5 times the unit granularity represents a multiple smaller than the reference value, then the 2-bit proportional difference indication range is also [0.1,10) times, Just halve the precision.

Embodiment five

As shown in Figure 3, the embodiment of the present invention also provides another method for receiving load information, which includes:

Step 301, the station (STA) receives the load information element (BSS load element) sent by the access point (AP);

Step 302, the STA acquires indication information indicating the frequency space flow utilization rate from the load information element, wherein the frequency space flow utilization rate includes the frequency space flow utilization rate of each unit bandwidth channel within the usable bandwidth of the AP rate, and the frequency spatial stream utilization rate is the ratio of the spatial stream occupied by the frequency resource blocks allocated on the unit bandwidth channel for data transmission to the maximum spatial stream supported by the antenna of the AP;

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically include: main 20MHz channel, two 20MHz channels included in the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel).

In step 303, the STA determines an AP to be accessed according to the utilization rate of the frequency space stream.

Based on the specific instruction information formation methods in Embodiments 2, 3, and 4, STAs can use corresponding methods to obtain the frequency space stream utilization rate from the preset domain of the BSS load element. The following uses the scheme provided by Embodiment 2 to obtain the STA The method of frequency space flow utilization is described in detail:

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

Then get Length to determine the length of BSS load element MAC frame;

Finally, get 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 0Hz in each 8 se 2 according to the length The parameter value of each 20MHz channel frequency space stream utilization rate is analyzed from the parameter value according to the way that the AP side indicates the space stream utilization rate of each 20MHz channel frequency rate known in advance.

Among them, the indication information in the embodiment of the present invention can be realized through the following examples, specifically including:

1. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel within the bandwidth;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

Second, when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel within the bandwidth;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

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

3. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes the main 20MHz channel and the set bandwidth channel, the indication information includes:

The frequency space flow utilization rate of the main 20MHz channel in the bandwidth;

The total frequency space flow utilization rate of the set bandwidth channel within the bandwidth, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel within the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, then the difference includes the 40MHz channel The difference obtained by making a difference between the main 20MHz channel and the secondary 20MHz channel and the average frequency space flow utilization rate of the 40MHz channel; the average frequency space flow utilization rate of the 40MHz channel is the frequency space flow utilization rate of the main 20MHz channel in the 40MHz channel rate and the linear arithmetic mean of the frequency space stream utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by subtracting the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel.

In this embodiment, the specific calculation of frequency space stream utilization can be done by the formula

Obtained, where N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the i-th CCA busy time period T The number of Nss streams utilized on the jth RU in the sth time subsegment within _i , RU _s,j is the jth RU in the sth time subsegment, and T _busy is the length of CCA busy time.

Embodiment six

As shown in FIG. 4, an embodiment of the present invention provides an access point, and the access point 400 includes:

The measurement module 401 is configured to measure the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within a set time range, wherein the frequency space flow utilization rate is allocated on the unit bandwidth channel The ratio of the spatial stream occupied by the frequency resource block for transmitting data to the maximum spatial stream supported by the antenna of the AP;

In this embodiment, the measurement module 401 is also used to pass the formula

Obtain the frequency space flow utilization rate, wherein, N _maxSS is the maximum number of flows on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, and N _{ss, s, j, i} are the The number of Nss streams used on the jth RU in the sth time subsegment of the _i CCA busy time period Ti, RU _{s, j} is the jth RU in the sth time subsegment, T _busy is the length of CCA busy time.

Adding module 402, configured to add indication information indicating the utilization rate of the frequency space stream to the load information element;

The sending module 403 is configured to send the load information element to the station STA.

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically including: the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the secondary 80MHz channel).

In the embodiment of the present invention, the frequency space flow utilization rate of each 20MHz channel within the usable bandwidth of the AP can be indicated in different ways. Several optimized implementation methods are provided below, including:

1. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, the adding module is specifically used to: the main 20MHz channel The frequency space stream utilization and sub-20MHz signal Channel frequency space stream utilization;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

It is added to the load information element as indication information.

2. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the adding module is specifically used to: the main 20MHz channel The utilization rate of the frequency space stream and the frequency space stream utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

It is added to the load information element as indication information.

3. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes the main 20MHz channel and the set bandwidth channel, the adding module is specifically used to: use the frequency space of the main 20MHz channel in the usable bandwidth stream utilization;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space stream utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel;

It is added to the load information element as indication information.

Embodiment seven

As shown in Figure 5, the embodiment of the present invention also provides a site, the site 500 includes:

A receiving module 501, configured to receive load information elements sent by the access point AP;

An indication information acquisition module 502, configured to acquire indication information indicating a frequency space flow utilization rate from the load information element, wherein the frequency space flow utilization rate includes the frequency space of each unit bandwidth channel within the usable bandwidth of the AP Flow utilization rate, and the frequency space flow utilization rate is the ratio of the space flow occupied by the frequency resource blocks allocated on the unit bandwidth channel for data transmission to the maximum space flow supported by the antenna of the AP;

A selection module 503, configured to determine an AP to be accessed according to the utilization rate of the frequency space stream.

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically including: the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the secondary 80MHz channel).

In this embodiment of the present invention, different ways can be used to indicate the frequency space flow utilization rate of each 20MHz channel within the available bandwidth of the AP. According to the different forms of the frequency space flow utilization rate sent by the access point, the indication information in this embodiment The obtaining module can obtain the instruction information in the following ways, including:

1. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the instruction information acquisition module is specifically used to obtain the information from the load information Obtained from the elements: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 80MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 80MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the secondary 80MHz channel The average frequency space stream utilization is the pair 80MHz signal The linear arithmetic average of the frequency space stream utilization ratios of the four 20MHz channels within the channel;

As indication information indicating the utilization rate of the frequency space stream.

2. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the instruction information acquisition module is specifically used to obtain the information from the load information Get from elements:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

3. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the instruction information obtaining module is specifically used to obtain from the load information element:

The frequency space flow utilization rate of the main 20MHz channel;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, then the difference includes the 40MHz channel The difference obtained by making a difference between the main 20MHz channel and the secondary 20MHz channel and the average frequency space flow utilization rate of the 40MHz channel; the average frequency space flow utilization rate of the 40MHz channel is the frequency space flow utilization rate of the main 20MHz channel in the 40MHz channel rate and the linear arithmetic mean of the frequency space stream utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

In this embodiment, the utilization ratios of all frequency space streams can be obtained by the following formula:

Among them, N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _ss,s,j,i are the i-th CCA busy time period T _i The number of Nss streams utilized on the jth RU in the sth time subsegment of RU _s,j is the jth RU in the sth time subsegment, and T _busy is the length of the CCA busy time.

Embodiment Eight

As shown in FIG. 6, an embodiment of the present invention provides an access point, and the access point 600 includes:

Processor 601, configured to measure the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within a set time range, where the frequency space flow utilization rate is allocated on the unit bandwidth channel The ratio of the spatial stream occupied by the frequency resource block used to transmit data to the maximum spatial stream supported by the antenna of the AP; and indication information indicating the utilization rate of the frequency spatial stream added to the payload information element;

In this embodiment, the processor 601 is also used to pass the formula

Obtain the frequency space flow utilization rate, wherein, N _maxSS is the maximum number of flows on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, and N _{ss, s, j, i} are the The number of Nss streams used on the jth RU in the sth time subsegment of the _i CCA busy time period Ti, RU _{s, j} is the jth RU in the sth time subsegment, T _busy is the length of CCA busy time.

The transceiver 602 is configured to send the load information element to the station STA.

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically including: the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the secondary 80MHz channel).

In the embodiment of the present invention, the frequency space flow utilization rate of each 20MHz channel within the usable bandwidth of the AP can be indicated in different ways. Several optimized implementation methods are provided below, including:

1. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the processor 601 is specifically used to: Frequency space stream utilization and sub-20MHz channel frequency space stream utilization;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

It is added to the load information element as indication information.

2. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the processor 601 is specifically used to: Frequency space flow utilization rate and frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

It is added to the load information element as indication information.

3. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes the main 20MHz channel and the set bandwidth channel, the processor 601 is specifically used to: the frequency space flow of the main 20MHz channel in the usable bandwidth utilization rate;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space stream utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel;

It is added to the load information element as indication information.

Embodiment nine

As shown in FIG. 7 , an embodiment of the present invention also provides a site, and the site 700 includes:

A transceiver 701, configured to receive load information elements sent by the access point AP;

The processor 702 is configured to obtain indication information indicating the frequency space flow utilization rate from the load information element, where the frequency space flow utilization rate includes the frequency space flow utilization rate of each unit bandwidth channel within the usable bandwidth of the AP rate, and the frequency spatial stream utilization rate is the ratio of the spatial stream occupied by the frequency resource blocks allocated on the unit bandwidth channel for data transmission to the maximum spatial stream supported by the antenna of the AP; and according to the Determine the AP that needs to be accessed based on the utilization rate of the above-mentioned frequency space stream.

When the method of this embodiment is applied to the WIFI system, based on the specific hardware implementation, the AP generally allocates the usable bandwidth with 20MHz as the minimum granularity unit, so the channels in the usable bandwidth can include: main 20MHz channel, secondary 20MHz channel , secondary 40MHz channel and secondary 80MHz channel. Then the channels indicated by each 20MHz channel in this embodiment include: the main 20MHz channel, the secondary 20MHz channel, two 20MHz channels in the secondary 40MHz channel (including the primary 20MHz channel and the secondary 20MHz channel), and the secondary 80MHz channel. 4 20MHz channels (specifically including: the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the secondary 80MHz channel).

In this embodiment of the present invention, different ways can be used to indicate the frequency space flow utilization rate of each 20MHz channel within the available bandwidth of the AP. According to the different forms of the frequency space flow utilization rate sent by the access point, the processor in this embodiment 702 can obtain the indication information in the following ways, including:

1. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the processor 702 is specifically used to obtain the load information element Obtaining: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel;

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

As indication information indicating the utilization rate of the frequency space stream.

2. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel, and a secondary 80MHz channel, the processor 702 is specifically used to obtain the load information element Get from:

The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel;

The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel;

The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

3. When the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the processor 702 is specifically configured to obtain from the load information element:

The frequency space flow utilization rate of the main 20MHz channel;

The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel;

The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein

If the set bandwidth channel is a 20MHz channel, the difference is 0;

If the set bandwidth channel is a 40MHz channel, the difference includes the average frequency space of the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the 40MHz channel respectively. The difference obtained by using the difference; the average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel in the 40MHz channel;

If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel;

As indication information indicating the utilization rate of the frequency space stream.

In this embodiment, the utilization ratios of all frequency space streams can be obtained by the following formula:

Among them, N _maxSS is the maximum number of streams on each resource unit (RU), N _RU is the number of resource blocks on the specified channel, N _ss,s,j,i are the i-th CCA busy time period T _i The number of Nss streams utilized on the jth RU in the sth time subsegment of RU _s,j is the jth RU in the sth time subsegment, and T _busy is the length of the CCA busy time.

The above one or more technical solutions in the embodiments of the present application have at least the following technical effects:

Due to the application of OFDMA and MU-MIMO in the prior art, resource blocks smaller than 20MHz in a 20MHz channel can be allocated to multiple users/spatial streams, and the spectrum and space utilization of each 20MHz channel are no longer the same and must be indicated separately. In the solution provided by the embodiment of the present invention, the load information sent by the AP to the STA includes the frequency space flow utilization rate of each 20MHz channel, so after the station STA receives the frequency space flow utilization rate information, it can The utilization information determines the frequency space stream utilization for each 20 MHz channel. Because the solution provided by the embodiment of the present invention In this method, the frequency space flow utilization parameters provided to STAs are more detailed than those in the prior art, so after the STA determines the frequency space flow utilization of each 20MHz channel, it can determine the available resources, and then determine the need to receive Entered AP. In this way, loads among APs are balanced, and resource allocation is more reasonable.

The method described in the present invention is not limited to the examples described in the specific implementation manner, and those skilled in the art can derive other implementation manners according to the technical solution of the present invention, which also belong to the technical innovation scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (19)

A method for sending load information, characterized in that the method comprises: The access point AP measures the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within the set time range, where the frequency space flow utilization rate is the frequency resource block allocated on the unit bandwidth channel The ratio of the spatial stream used to transmit data to the maximum spatial stream supported by the antenna of the AP; adding indication information indicating the utilization rate of the frequency space stream to the load information element; Send the load information element to the station STA. The method according to claim 1, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the indication Information includes: The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel; The difference between the average frequency space stream utilization rate of the secondary 80MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 80MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the secondary 80MHz channel The average frequency space stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the four 20MHz channels in the secondary 80MHz channel. The method according to claim 1, wherein when the unit bandwidth channel is a 20MHz channel, the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, and a secondary 40MHz channel. channel and secondary 80MHz channel, the indication information includes: The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization rate of the main 20MH channel, secondary 20MHz channel, and two 20MHz channels in the secondary 40MHz channel. The method according to claim 1, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the indication information includes: The frequency space flow utilization rate of the main 20MHz channel in the available bandwidth; The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel; The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein If the set bandwidth channel is a 20MHz channel, the difference is 0; If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; If the set bandwidth channel is an 80MHz channel, the difference includes the secondary 80MHz channel The difference obtained by making the difference between the main 20MHz channel, the secondary 20MHz channel and the two 20MHz channels included in the secondary 40MHz channel in the channel and the average frequency space flow utilization rate of the secondary 80MHz channel; the average frequency of the secondary 80MHz channel The frequency space stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the four 20MHz channels in the secondary 80MHz channel. The method according to any one of claims 1 to 4, characterized in that the frequency space flow utilization ratio is obtained by the formula Obtained, among them, N _maxSS is the maximum number of streams on each resource unit RU, N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the evaluation CCA busy period in the i-th idle channel The number of Nss streams utilized on the j-th RU in the s-th time sub-segment of T _i , RU _s,j is the j-th RU in the s-th time sub-segment. A load information receiving method, characterized in that the method comprises: The station STA receives the load information element sent by the access point AP; The STA acquires indication information indicating the frequency space flow utilization rate from the load information element, where the frequency space flow utilization rate includes the frequency space flow utilization rate of each unit bandwidth channel within the usable bandwidth of the AP, and The frequency space flow utilization rate is the ratio of the space flow occupied by the frequency resource blocks allocated on the unit bandwidth channel for data transmission to the maximum space flow supported by the antenna of the AP; The STA determines the AP to be accessed according to the utilization rate of the frequency space stream. The method according to claim 6, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the indication Information includes: The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow of the secondary 20MHz channel utilization rate; The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel; The difference between the average frequency space stream utilization rate of the secondary 80MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 80MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the secondary 80MHz channel The average frequency space stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the four 20MHz channels in the secondary 80MHz channel. The method according to claim 6, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the indication Information includes: The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization rate of the main 20MH channel, secondary 20MHz channel, and two 20MHz channels in the secondary 40MHz channel. The method according to claim 6, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the indication information includes: The frequency space flow utilization rate of the main 20MHz channel; The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space stream utilization rate of at least one 20MHz channel in the set bandwidth channel; The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein If the set bandwidth channel is a 20MHz channel, the difference is 0; If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by subtracting the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel. The method according to any one of claims 6 to 9, characterized in that the frequency space flow utilization ratio is obtained by the formula Obtained, among them, N _maxSS is the maximum number of streams on each resource unit RU, N _RU is the number of resource blocks on the specified channel, N _{ss, s, j, i} is the evaluation CCA busy period in the i-th idle channel The number of Nss streams utilized on the j-th RU in the s-th time sub-segment of T _i , RU _s,j is the j-th RU in the s-th time sub-segment. An access point, characterized in that the access point includes: A measurement module, configured to measure the frequency space flow utilization rate of each unit bandwidth channel within the available bandwidth of the AP within a set time range, wherein the frequency space flow utilization rate is the frequency allocated on the unit bandwidth channel The ratio of the spatial stream occupied by the resource block for data transmission relative to the maximum spatial stream supported by the antenna of the AP; an adding module, configured to add indication information indicating the utilization rate of the frequency space stream to the load information element; A sending module, configured to send the load information element to the station STA. The access point according to claim 11, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the The adding module is specifically used to: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel; The difference between the average frequency space stream utilization rate of the secondary 80MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 80MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the secondary 80MHz channel The average frequency space stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the four 20MHz channels in the secondary 80MHz channel; It is added to the load information element as indication information. The access point according to claim 11, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the The adding module is specifically used to: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel; The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel; It is added to the load information element as indication information. The access point according to claim 11, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the adding module is specifically used to add : The frequency space flow utilization rate of the main 20MHz channel within the usable bandwidth; The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel; The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein If the set bandwidth channel is a 20MHz channel, the difference is 0; If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making a difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel The linear arithmetic mean of the frequency space stream utilization of the four 20MHz channels in the channel; It is added to the load information element as indication information. The access point according to any one of claims 11-14, characterized in that the measurement module is also used to pass the formula Obtain the frequency space flow utilization rate, wherein, N _maxSS is the maximum number of flows on each resource unit RU, N _RU is the number of resource blocks on the specified channel, and N _{ss, s, j, i} are the i-th Idle channel assessment is the number of Nss streams utilized on the _j -th RU in the s-th time sub-segment of the CCA busy time period Ti, and RU _s,j is the j-th RU in the s-th time sub-segment. A site, characterized in that the site includes: A receiving module, configured to receive load information elements sent by the access point AP; An indication information acquisition module, configured to acquire indication information indicating the frequency space flow utilization rate from the load information element, wherein the frequency space flow utilization rate includes the frequency space flow of each unit bandwidth channel within the usable bandwidth of the AP Utilization rate, and the utilization rate of the frequency space stream is the ratio of the space stream occupied by the frequency resource block allocated on the unit bandwidth channel for data transmission to the maximum space stream supported by the antenna of the AP; A selecting module, configured to determine an AP to be accessed according to the utilization rate of the frequency space stream. The station according to claim 16, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the indication The information acquisition module is specifically used to acquire from the load information elements: the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the average frequency space stream utilization rate of the secondary 40MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the average utilization rate of the secondary 40MHz channel; wherein, the average frequency space stream utilization rate of the secondary 40MHz channel is The frequency space flow utilization rate is the linear arithmetic average of the frequency space flow utilization rates of the two 20MHz channels in the secondary 40MHz channel; The difference between the average frequency space stream utilization rate of the secondary 80MHz channel and the frequency space stream utilization rate of each 20MHz channel in the secondary 80MHz channel relative to the average utilization rate of the secondary 80MHz channel, wherein the secondary 80MHz channel The average frequency space stream utilization rate is the linear arithmetic average of the frequency space stream utilization rates of the four 20MHz channels in the secondary 80MHz channel; As indication information indicating the utilization rate of the frequency space stream. The station according to claim 16, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel, a secondary 20MHz channel, a secondary 40MHz channel and a secondary 80MHz channel, then the indication The information obtaining module is specifically used to obtain from the load information elements: The frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; The difference between the frequency space flow utilization rate of each 20MHz channel in the secondary 40MHz channel relative to the frequency space flow utilization rate of the main 20MHz channel and the secondary 20MHz channel; The difference between the frequency space flow utilization of each 20MHz channel in the secondary 80MHz channel and the frequency space flow utilization of the main 20MH channel, the secondary 20MHz channel, and the frequency space flow utilization of two 20MHz channels in the secondary 40MHz channel; As indication information indicating the utilization rate of the frequency space stream. The station according to claim 16, wherein when the unit bandwidth channel is a 20MHz channel, and the usable bandwidth includes a main 20MHz channel and a set bandwidth channel, the instruction information acquisition module is specifically used to obtain from The load information element is obtained from: The frequency space flow utilization rate of the main 20MHz channel; The total frequency space flow utilization rate of the set bandwidth channel, wherein the total frequency space flow utilization rate is the linear arithmetic mean value of the frequency space flow utilization rate of at least one 20MHz channel in the set bandwidth channel; The difference between the frequency space stream utilization rate of each 20MHz channel in the set bandwidth channel relative to the total frequency space stream utilization rate; wherein If the set bandwidth channel is a 20MHz channel, the difference is 0; If the set bandwidth channel is a 40MHz channel, the difference includes the difference between the main 20MHz channel and the secondary 20MHz channel in the 40MHz channel and the average frequency space flow utilization of the 40MHz channel; the 40MHz channel The average frequency space flow utilization rate of the 40MHz channel is the linear arithmetic mean of the frequency space flow utilization rate of the main 20MHz channel and the frequency space flow utilization rate of the secondary 20MHz channel; If the set bandwidth channel is an 80MHz channel, then the difference includes the main 20MHz channel in the secondary 80MHz channel, the secondary 20MHz channel and the secondary 40MHz channel in the secondary 80MHz channel. The difference obtained by making the difference between the average frequency space flow utilization rate of the channel; the average frequency space flow utilization rate of the secondary 80MHz channel is the linear arithmetic average of the frequency space flow utilization rates of the four 20MHz channels in the secondary 80MHz channel; As indication information indicating the utilization rate of the frequency space stream.