WO2018153157A1 - Information sending method and device - Google Patents

Abstract

An information sending method and device. The information sending method comprises: an access point generates a radio frame, which comprises a first indication parameter used for correcting a time point for switching of a basic service set identifier, or used for indicating radio frame information carrying a valid switching parameter; the access point sends the radio frame. According to embodiments of the present application, by setting a first indication parameter and determining a time point for switching of a basic service set identifier, the time for switching of the basic service set identifier is controlled, and the switching of the basic service set identifier is implemented according to the indication parameter, so that the problem in the art that different access points have the same basic service set identifier is solved. In the embodiments of the present invention, the switching time of basic service set identifiers indicated by radio frames of different formats is the same, so that misoperations of spatial multiplexing of a site in the basic service set can be reduced, and effective transmission can be guaranteed.

Description

Information transmitting method and device Technical field

The present disclosure relates to communications technologies, particularly in the field of wireless local area network technologies, and more particularly, to an information transmitting method and apparatus.

Background technique

With the explosive application of WLAN networks, the deployment of WLAN networks is increasingly dense, and the network load is also increasing. As the network increases, the coverage of network coverage is more serious. The efficiency of the WLAN network will show a significant decline. Simply increasing the air interface rate will not solve the problem. Therefore, the IEEE Standards Organization has established a related task force to address the WLAN network efficiency issues. Among them, the technology of interference avoidance and efficiency improvement under the condition of dense network deployment has become a hot topic of discussion.

In order to enable the station to identify in advance the radio frame of the Basic Service Set (BSS) before receiving the radio frame, the BSS color is defined as the identifier of the basic service set for performing the BSS difference. A BSS has only one BSS color. In the WLAN communication standard 802.11ax (hereinafter referred to as 11ax), the BSS color occupies 6 bits and can indicate 0-63, a total of 64 types of identifiers. Since 11ax defines a dense network application technology and there is a hidden terminal, when an access point (AP) selects a BSS color, it is likely that the selected BSS color is the same as the BSS color selected by other APs, as shown in FIG. Show. The first access point AP1 and the second access point AP2 are mutually hidden terminals. When the BSS is established, the first access point AP1 and the second access point AP2 have the BSS color selected by the first access point AP1 and the second access point AP2 because they do not communicate with each other even if the network scanning is performed. It may be the same, especially in dense scenes.

Summary of the invention

In view of this, the present disclosure provides the following solutions.

According to a first aspect of the present disclosure, there is provided an information transmitting method, comprising: an access point generating a radio frame, wherein the radio frame includes a first indication parameter; and the first indication parameter is set to correct a basic service set identifier switching The moment is either set to indicate radio frame information carrying a valid handover parameter; the access point transmits the radio frame.

According to a second aspect of the present disclosure, a method for basic service set identity switching is provided, including: a station receiving a radio frame, the radio frame including a first indication parameter; and the station correcting a basic according to the first indication parameter The service set identifies a handover time, or determines a radio frame carrying a valid handover parameter according to the first indication parameter.

According to a third aspect of the present disclosure, there is provided an information transmitting apparatus, comprising: a framing module configured to generate a radio frame, wherein the radio frame includes a first indication parameter; and the first indication parameter is set to correct a basic service The moment when the set identifier is switched or set to indicate radio frame information carrying a valid handover parameter; and the sending module is configured to transmit the radio frame.

The present disclosure also provides an access point including the above information transmitting apparatus.

According to a fourth aspect of the present disclosure, there is provided an apparatus for basic service set identifier switching, comprising: a receiving module configured to receive a radio frame, the radio frame includes a first indication parameter; and a processing module configured to The first indication parameter corrects the basic service set identifier switching moment, or determines a radio frame carrying the valid handover parameter according to the first indication parameter.

The present disclosure also provides a station, including the apparatus for marking the basic service set identity described above. In accordance with a fifth aspect of the present disclosure, a system for basic service set identification switching is provided, including an access point and a site. The access point includes: a framing module, configured to generate a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is used to correct a time when the basic service set identifier is switched or is used to indicate carrying a valid handover parameter. a radio frame information, a sending module, configured to send the radio frame, and a switching module configured to perform basic service set identifier switching according to the first indication parameter. The station includes: a receiving module, configured to receive the radio frame; and a processing module, configured to: correct a basic service set identifier switching moment according to the first indication parameter, or determine a radio frame carrying a valid handover parameter according to the first indication parameter .

According to a sixth aspect of the present disclosure, a method for basic service set identification handover is provided, comprising: an access point generating a radio frame, the radio frame including a first indication parameter; the first indication parameter being used for Correcting a time when the basic service set identifier is switched or for indicating radio frame information carrying a valid handover parameter; the access point transmits the radio frame; and the access point performs basic service set identifier switching according to the first indication parameter; Determining a radio frame; the station corrects a basic service set identifier switching moment according to the first indication parameter, or determines a radio frame carrying a valid handover parameter according to the first indication parameter.

Embodiments of the present disclosure also provide a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.

The foregoing solution generates a radio frame by using an access point, where the radio frame includes a first indication parameter indicating a basic service set identifier switching, and the access point or the station performs basic service set identifier switching according to the first indication parameter, thereby setting The first indication parameter is used to determine the time when the basic service set identifier is switched, and the time for switching the basic service set identifier is controlled, thereby implementing the basic service set identifier switching, thereby solving the same basic service set identifier of different access points existing in the related technology. The problem. The embodiment of the present disclosure switches to a new basic service set identifier at a time when the first handover time is added with the offset value indication by setting the first indication parameter to the offset value, or the beacon carrying the first indication parameter The target beacon transmission time corresponding to the frame is added to the time indicated by the offset value, and is switched to the new basic service set identifier; or the first indication parameter indicates the radio frame information carrying the valid handover parameter, and the effective handover parameter is carried according to the The target beacon switching parameter and/or the offset value indicated by the radio frame performs basic service set identifier switching, so that the basic service set identifier switching time of the radio frame indication of different formats is the same, and the switching moment may exist. Error, but this error does not affect system performance and transmission. The embodiment of the present disclosure solves the problem that the basic service set identifier switching time is inconsistent in the case of dual beacons and even multiple beacons. Through the embodiments of the present disclosure, the erroneous operation of spatial multiplexing of the sites in the BSS can be reduced, and the transmission can be effectively performed.

DRAWINGS

1 is a schematic diagram of a case where the BSS colors selected by the first access point AP1 and the second access point AP2 are the same in the related art;

2 is a schematic diagram of an access point performing a BSS color switch after a number of TBTTs in a beacon frame or by a unicast frame;

3 is a schematic diagram showing a case where a BSC color of a part of a site in a BSS is different from a BSS color of another part of a site when a transmission method of a dual Beacon is adopted;

4 is a flowchart of an information sending method for basic service set identifier switching according to an embodiment of the present disclosure;

5 is a flowchart of a method for switching basic service set identifiers according to Embodiment 2 of the present disclosure;

6 is a block diagram of an information transmitting apparatus for basic service set identifier switching according to Embodiment 3 of the present disclosure;

7 is a structural diagram of an apparatus for basic service set identifier switching according to Embodiment 4 of the present disclosure;

8 is a schematic diagram of BSS color switching when an access point supports a dual beacon function according to Application Example 1 of the present disclosure;

9 is a schematic diagram of BSS color switching when an access point supports a dual beacon function according to Application Example 2 of the present disclosure;

10 is a schematic diagram showing an increase in offset value in Application Example 3 of the present disclosure;

11 is a schematic diagram showing an increase of a second indication parameter in Application Example 3 of the present disclosure;

12 is a schematic diagram showing an increase of a reference parameter in Application Example 4 of the present disclosure;

FIG. 13 is a schematic diagram showing a first indication parameter (offset value) indicating switching in Application Example 5 of the present disclosure.

detailed description

The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

In order to overcome the drawbacks caused by the same situation in which the BSS colors selected by different access points in the related art are the same, the rules of BSS color switching are defined. The access point AP performs BSS Color switching in the beacon frame or through the unicast frame to notify the STA (site) how many target beacon transmission time (TBTT), as shown in FIG. 2 .

In addition, in order to increase coverage and increase transmission reliability, a dual beacon (dual beacon) transmission method is defined. One Beacon is sent in a non-11ax format, and the other is transmitted in an 11ax format.

If the above BSS color switching method is applied to the dual Beacon transmission method, there will be a problem that some sites switch to the new BSS color, and another part of the site does not switch to the new color, as shown in FIG. The first station STA1 performs information switching according to the first beacon frame in the non-11ax format, and the second station STA2 performs information switching according to the second beacon frame in the 11ax format, and then there is a period of time (the first beacon frame Beacon-1) (Count1=0) to the second beacon frame Beacon-2 (Count2=0)), some sites in the BSS use the old BSS color, and another part of the site uses the new BSS color, causing spatial multiplexing within the BSS, interfering with the current transmission.

Embodiment 1:

Referring to FIG. 4, which is a flowchart of an information sending method according to Embodiment 1 of the present disclosure, the method in this embodiment is applied to an access point, and the method includes the following steps.

In step 401, the access point generates a radio frame, where the radio frame includes a first indication parameter; the first indication parameter is used to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter.

At step 402, the access point transmits a radio frame.

In this embodiment, optionally, the first indication parameter includes an offset value; and the time when the basic service set identifier is switched is the first handover time plus an offset value.

In this embodiment, optionally, the radio frame further includes a target beacon switching parameter, where the target beacon switching parameter is a target beacon that needs to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. The number of transmission moments. For example, when the target beacon switching parameter is set to 2, it means that it is necessary to wait for 2 target beacon transmission times (TBTT) to switch the BSS color.

Optionally, the first switching moment is determined according to the target beacon switching parameter, or the first switching moment is a target beacon transmission moment corresponding to the beacon frame carrying the first indication parameter. The first switching moment is the reference reference, and the value of the offset value and the reference reference can be determined by the access point according to the actual situation in the application.

In this embodiment, the first switching moment is determined according to the target beacon switching parameter, and the first switching moment is a target beacon transmission time corresponding to the beacon frame carrying the target beacon switching parameter of 0. Of course, this is only an example. In the actual application, the first switching moment may also be other time points, which is not limited by the embodiment of the present disclosure.

In this embodiment, the method further includes: the radio frame further includes a second indication parameter, where the second indication parameter is used to indicate whether the first indication parameter exists.

In this embodiment, optionally, the radio frame includes two or more formats, and the time of the basic service set identifier switching indicated in the two or more radio frames is the same.

In this embodiment, optionally, the radio frame information carrying the effective handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth.

In this embodiment, optionally, the radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame.

Embodiment 2:

Referring to FIG. 5, which is a flowchart of a method for basic service set identifier switching according to Embodiment 2 of the present disclosure, the method in this embodiment is applied to a site, and the method includes the following steps.

In step 501, the station receives a radio frame, the radio frame including a first indication parameter.

In step 502, the station corrects the basic service set identification switching time according to the first indication parameter, or determines a radio frame carrying the effective handover parameter according to the first indication parameter.

In this embodiment, optionally, the first indication parameter includes an offset value; and the station performs basic service set identifier switching at a time when the first switching moment is added with an offset value.

In this embodiment, optionally, the method further includes: the station receiving the radio frame carrying the valid handover parameter, and determining the basic service set identifier switching time according to the valid handover parameter.

In this embodiment, optionally, the radio frame further includes a target beacon switching parameter, where the target beacon switching parameter is a target that needs to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. The number of beacon transmission moments.

In this embodiment, optionally, the first switching moment is determined according to the target beacon switching parameter. Alternatively, the first switching moment is a target beacon transmission time corresponding to the beacon frame carrying the first indication parameter.

In this embodiment, optionally, the first switching moment is determined according to the target beacon switching parameter, and the first switching moment is a target beacon transmission moment corresponding to the beacon frame carrying the target beacon switching parameter of 0. .

In this embodiment, optionally, the radio frame further includes a second indication parameter, where the second indication parameter is used to indicate whether the first indication parameter exists.

In this embodiment, optionally, the radio frame includes two or more formats, and the times of the basic service set identifier switching indicated in the two or more radio frames are the same.

In this embodiment, optionally, the radio frame information carrying the valid handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth.

In this embodiment, optionally, the effective handover parameter refers to determining, by using a parameter, a basic service set identifier switching moment, where the valid handover parameter includes: a target beacon switching parameter and/or an offset value.

In this embodiment, optionally, the radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame.

Embodiment 3:

FIG. 6 is a block diagram of an information sending apparatus according to Embodiment 3 of the present disclosure. In this embodiment, the apparatus is applied to an access point, and the apparatus includes: a framing module and a sending module.

The framing module is configured to generate a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is set to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter.

The sending module is set to send wireless frames.

In this embodiment, optionally, the first indication parameter included in the radio frame generated by the framing module includes an offset value; and the time when the basic service set identifier is switched is the first handover time plus an offset value.

In this embodiment, optionally, the radio frame generated by the framing module further includes a target beacon switching parameter, where the target basic beacon switching parameter needs to continue to maintain the old basic service before switching to the new basic service set identifier. Sets the number of target beacon transmission times identified.

In this embodiment, optionally, the first switching moment is determined according to the target beacon switching parameter, or, optionally, the first switching moment is a target beacon transmission moment corresponding to the beacon frame carrying the first indication parameter.

In this embodiment, the first switching moment is determined according to the target beacon switching parameter, and the first switching moment is a target beacon transmission time corresponding to the beacon frame carrying the target beacon switching parameter of 0.

In this embodiment, optionally, the radio frame generated by the framing module further includes a second indication parameter, where the second indication parameter is used to indicate whether the first indication parameter exists.

In this embodiment, optionally, the radio frame generated by the framing module includes two or more formats, and the time of the basic service set identifier switching indicated in the two or more radio frames is the same.

In this embodiment, optionally, the radio frame information generated by the framing module to carry the effective handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth.

In this embodiment, optionally, the effective handover parameters include: a target beacon switching parameter and/or an offset value.

In this embodiment, optionally, the radio frame generated by the framing module includes a beacon frame or a unicast radio frame or a broadcast radio frame.

In the present embodiment, an access point is also provided, including the information transmitting apparatus described above, and the description of the information transmitting apparatus is described with reference to the description of the access point.

Embodiment 4:

Referring to FIG. 7 , which is a device structure diagram of basic service set identifier switching according to Embodiment 4 of the present disclosure, the apparatus in this embodiment is applied to a site, and the device includes: a receiving module and a processing module.

The receiving module is configured to receive a radio frame, where the radio frame includes a first indication parameter.

The processing module is configured to correct a basic service set identifier switching moment according to the first indication parameter, or determine a radio frame carrying the valid handover parameter according to the first indication parameter.

In this embodiment, optionally, the first indication parameter included in the radio frame received by the receiving module includes an offset value; and the station performs basic service set identifier switching at a time when the first switching moment is added with an offset value.

In this embodiment, optionally, the receiving module is further configured to receive a radio frame carrying a valid handover parameter, and the processing module is further configured to determine a basic service set identifier switching moment according to the effective handover parameter.

In this embodiment, optionally, the radio frame received by the receiving module further includes a target beacon switching parameter, where the target beacon switching parameter needs to continue to maintain the old basic service set before switching to the new basic service set identifier. The number of identified target beacon transmission moments.

In this embodiment, optionally, the first switching moment is determined according to the target beacon switching parameter, or, optionally, the first switching moment is a target beacon transmission moment corresponding to the beacon frame carrying the first indication parameter.

In this embodiment, the first switching moment is determined according to the target beacon switching parameter, and the first switching moment is a target beacon transmission time corresponding to the beacon frame carrying the target beacon switching parameter of 0.

In this embodiment, optionally, the radio frame received by the receiving module further includes a second indication parameter, where the second indication parameter is used to indicate whether the first indication parameter exists.

In this embodiment, optionally, the radio frame received by the receiving module includes two or more formats, and the times of the basic service set identifier switching indicated in the two or more radio frames are the same.

In this embodiment, optionally, the radio frame received by the receiving module indicates that the radio frame information carrying the valid handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth.

In this embodiment, optionally, the effective handover parameters include: a target beacon switching parameter and/or an offset value.

In this embodiment, optionally, the radio frame received by the receiving module includes a beacon frame or a unicast radio frame or a broadcast radio frame.

In this embodiment, there is also provided a station, including the apparatus for basic service set identifier switching described above, with reference to the above description of the apparatus for basic service set identifier switching.

Embodiments of the present disclosure also provide a system for basic service set identity switching, including access points and sites.

The access point includes: a framing module, configured to generate a radio frame, where the radio frame includes a first indication parameter; the first indication parameter is used to correct a time when the basic service set identifier is switched or is used to indicate a wireless carrying a valid handover parameter a frame information, a sending module, configured to send the wireless frame, and a switching module configured to perform basic service set identifier switching according to the first indication parameter.

The station includes: a receiving module, configured to receive a radio frame; and a processing module, configured to correct a basic service set identifier switching moment according to the first indication parameter, or determine a radio frame carrying the valid handover parameter according to the first indication parameter.

Optionally, the first indication parameter included in the radio frame generated by the framing module includes an offset value, and the time when the basic service set identifier is switched is the first handover time plus an offset value.

Optionally, the receiving module is further configured to receive a radio frame carrying a valid handover parameter, and the processing module is further configured to determine a basic service set identifier switching moment according to the effective handover parameter.

The embodiment of the present disclosure further provides a method for basic service set identifier switching, including: an access point generates a radio frame, where the radio frame includes a first indication parameter; and the first indication parameter is used to correct a basic service set identifier switch. The time is either used to indicate radio frame information carrying a valid handover parameter; the access point transmits the radio frame; the access point performs basic service set identifier switching according to the first indication parameter; the station receives the radio frame; and the station according to the first indication parameter Correcting the basic service set to identify the switching moment, or determining the radio frame carrying the valid handover parameter according to the first indication parameter.

Optionally, the first indication parameter includes an offset value; the time when the basic service set identifier is switched is a first switching moment plus an offset value.

Optionally, the method further includes: the station receives the radio frame carrying the valid handover parameter, and determines the basic service set identifier switching moment according to the effective handover parameter.

For the other aspects of the system for the basic service set identifier switching and the method for the basic service set identifier switching, reference may be made to the detailed description of the first embodiment to the fourth embodiment of the present disclosure, and details are not described herein again.

The technical solutions of the present disclosure are exemplarily described below by way of examples.

Application example 1:

In a wireless local area network, an access point AP associates two STAs: a first station (STA1) and a second station (STA2). The AP supports the dual beacon function: sending the beacon in the first format and the beacon in the second format. In this application example, the first format is a non-11ax format, and the second format is a 11ax format. Of course, the actual application can also include beacons in other formats.

In this application example, the first station STA1 operates according to the parameters of the first beacon frame (Beacon-1) of the first format (not 11ax format), and the second station STA2 according to the second format (11ax format) The parameters of the beacon frame (Beacon-2) operate.

The AP selects a value as the BSS color of the BSS. During the life cycle of the BSS, the AP finds that its BSS color is the same as the BSS color of other BSSs, and there are more serious collisions. The AP decides to perform a BSS color switch. The AP indicates the target beacon switching parameter and the first indication parameter (offset value) in the beacon of the 11ax format and the beacon of the non-11ax format. The target beacon switching parameter is used to indicate the number of TBTTs that the access point and the station need to continue to maintain the old BSS color before switching to the new BSS color. The offset value is used to indicate the offset time of the TBTT corresponding to the beacon frame carrying the target beacon switching parameter equal to zero. The TBTT corresponding to the beacon frame carrying the target indication handover parameter equal to 0 is the first handover time. The moment when the AP and the station perform basic service set identifier switching is the time corresponding to the first switching time plus the offset value.

According to the method of this application example, the point of the color switch indicated by the beacon of the 11ax format and the beacon of the non-11ax format is the same. As shown in FIG. 8, the beacon interval transmitted by the second beacon frame (Beacon-2) of the second format (11ax format) and the first beacon frame (Beacon-1) of the first format (non-11ax format) The Beacon interval (BI) is the same. The AP finds that its BSS color is the same as the BSS color of other BSSs, and decides to perform BSS color switching. The first beacon frame Beacon-1 notifies the target beacon switching parameter of the first beacon frame Beacon-1 and the first indication parameter (offset value); the second beacon frame Beacon-2 notifies the second beacon frame Beacon- The target beacon switching parameter of 2 and the first indication parameter (offset value).

FIG. 8 depicts a special case in which the target beacon switching parameter of the first beacon frame Beacon-1 is equal to 0, and the TBTT corresponding to the second beacon frame Beacon-2 is earlier than the TBTT corresponding to 0. Therefore, the offset value indicated by the first beacon frame Beacon-1 is not 0, and the target beacon switching parameter of the second beacon frame Beacon-2 is set equal to the TBTT corresponding to 0 and the first beacon frame Beacon-1. The target beacon switching parameter is equal to the time difference of the TBTT corresponding to 0. The second beacon frame Beacon-2 indicates an offset value of zero. The first time point at which the first beacon frame Beacon-1 receives the BSS color switch is the same as the second time point at which the second beacon frame Beacon-2 receives the BSS color switch. It should be noted that the timing of the handover is the same, and may cause a certain deviation due to factors such as clock accuracy, reception delay, and processing delay. The time points of the switching in the embodiment of the present disclosure are the same, which means that there may be a time difference within the allowable range between the first time point and the second time point.

Here, the offset values indicated by the first beacon frame Beacon-1 and the second beacon frame Beacon-2, respectively, may not be zero. Here Count1 and Count2 represent the target beacon switching parameters. Count1=2 in Fig. 8, that is, the target beacon switching parameter indicates that it is necessary to wait for 2 TBTTs to switch the BSS color.

After hearing the first beacon frame Beacon-1 of Count1=2, the STA1 may not continue to listen to the subsequent first beacon frame, and switch the parameter and the offset value according to the target beacon of the first beacon frame Beacon-1. Get the moment when the BSS color is switched. The obtaining method is: the TBTT+ target beacon switching parameter *BI+ offset value corresponding to the current first beacon frame Beacon-1. Among them, BI is Beacon Interval.

Application example 2:

In a wireless local area network, an access point AP associates two STAs: a first station (STA1) and a second station (STA2). The AP supports the dual beacon function: sending beacons in the 11ax format and beacons in the non-11ax format. STA1 operates according to the parameters of the first beacon frame (Beacon-1) in the non-11ax format, and STA2 operates according to the parameters of the second beacon frame (Beacon-2) in the 11ax format. The AP selects a value as the BSS color of the BSS. During the life cycle of the BSS, the AP finds that its BSS color is the same as the BSS color of other BSSs, and there are more serious collisions. The AP decides to perform a BSS color switch. The AP indicates the target beacon switching parameter and the first indication parameter (offset value) in the beacon of the 11ax format and the beacon of the non-11ax format. The target beacon switching parameter is used to indicate the number of TBTTs that the access point and the station need to continue to maintain the old BSS color before switching to the new BSS color. The offset value is used to indicate the offset time of the TBTT corresponding to the beacon frame carrying the target beacon switching parameter equal to zero. The TBTT corresponding to the beacon frame carrying the target indication handover parameter equal to 0 is the first handover time. The moment when the AP and the station perform basic service set identifier switching is the time corresponding to the first switching time plus the offset value.

With the method of this embodiment, the time point of the Color switch indicated by the beacon of the 11ax format and the beacon of the non-11ax format is the same. As shown in Figure 9, the Beacon Interval sent by the beacon (the second beacon frame, Beacon-2) in the 11ax format and the beacon (the first beacon frame, Beacon-1) in the non-11ax format are different. The AP finds that its BSS Color is the same as the BSS Color of other BSSs and decides to perform BSS Color switching. Beacon-1 notifies Beacon-1 of the target beacon switching parameters and offset values; Beacon-2 notifies Beacon-2 of the target beacon switching parameters and offset values. Figure 9 depicts a special case where Beacon-1 indicates an offset value of 0 and Beacon-2 indicates an offset value other than zero. The time when the Beacon-1 receives the BSS color switch is the same as the time when the Beacon-2 receives the BSS color switch.

Here, the offset values indicated by the first beacon frame Beacon-1 and the second beacon frame Beacon-2, respectively, may not be zero. Here Count1 and Count2 represent the target beacon switching parameters. Count1=2 in Fig. 8, that is, the target beacon switching parameter indicates that it is necessary to wait for 2 TBTTs to switch the BSS color.

After hearing the first beacon frame Beacon-1 of Count1=2, the STA1 may not continue to listen to the subsequent beacon frame, and obtain the target beacon switching parameter and the offset value of the first beacon frame Beacon-1. The moment to switch to BSS color. The obtaining method is: the current TBTT+ target beacon switching parameter *BI+ offset value corresponding to Beacon-1 of Count1=2.

The above-mentioned obtaining method may have a deviation in practical applications. For example, the TBTT corresponding to the Beacon-1 of the current Count1=2 may not capture the TBTT time during the calculation, and replace the TBTT with the current time when the Beacon-1 is received. This may result in a bias in the final calculation, but is a range that can be considered.

Application example 3:

In the WLAN, the access point AP supports the dual beacon function: sending beacons in the 11ax format and beacons in the non-11ax format. During the life cycle of the BSS, the AP finds that its BSS color is the same as the BSS color of other BSSs, and there are more serious collisions. The AP decides to perform a BSS color switch. The AP notifies the site of the BSS Color handover parameter by a unicast radio frame or a broadcast radio frame. The format used by the AP to notify the BSS color switching parameters by using a unicast radio frame or a broadcast radio frame is as shown in FIG. The Color Switch Countdown corresponds to the target beacon switching parameter, and the Color Switch Offset corresponds to the first indication parameter (offset value). The length of the Color Switch Offset field can be designed according to the unit. If the unit of this field is 1 microsecond (us), then in order to be able to indicate that the time is long enough, the number of bits required is relatively large. If 2 bytes are used, then a suitable value is in units of 8 microseconds or 16 us. The length and unit of the Color Switch Offset field can be other values. In addition, in order to reduce the overhead, some bits can be used to indicate whether the Color Switch Offset field exists before the Color Switch Offset field. This indication is the second indication parameter. Figure 11 shows the use of 1 bit of the New BSS Color Information field to indicate the presence of the Color Switch Offset field. If the indicator Color Switch Offset field does not exist, it implicitly indicates that the value indicated by the Color Switch Offset field is 0.

Application example 4:

In a wireless local area network, an access point AP associates two STAs: a first station (STA1) and a second station (STA2). The AP supports the dual beacon function: sending beacons in the 11ax format and beacons in the non-11ax format. STA1 can receive both beacons in the 11ax format and beacons in the non-11ax format. STA2 can only receive beacons in the 11ax format. The reason for the above situation may be that STA1 is closer to the AP, and STA2 is farther from the AP.

The AP selects a value as the BSS color of the BSS. During the life cycle of the BSS, the AP finds that its BSS color is the same as the BSS color of other BSSs, and there is a serious collision. The AP decides to perform BSS color switching. The AP indicates the target beacon switching parameter and the first indication parameter (indicating the radio frame carrying the valid handover parameter) in the beacon of the 11ax format and the beacon of the non-11ax format. The target beacon switching parameter is used to indicate the number of TBTTs that the access point and the station need to continue to maintain the old BSS color before switching to the new BSS color. The first indication parameter is used to indicate whether the target beacon switching parameter of the non-11ax format beacon or the 11ax format Beacon frame is taken as the standard.

For example, in this scenario, STA2 can only receive Beacons in 11ax format, and STA1 can receive Beacons in 11ax format and Beacons in non-11ax format. Therefore, in the Beacon of the non-11ax format, the first indication parameter indicates that the parameter in the Beacon in the 11ax format is taken as the standard. In the Beacon of the 11ax format, the first indication parameter indicates that the parameter in the Beacon in the 11ax format is taken as the standard.

STA1 can receive only one type of Beacon, such as a Beacon in non-11ax format. In a non-11ax format, the first indication parameter indicates that the Beacon in the 11ax format is used. In this way, STA1 can receive the Beacon in the 11ax format. In this way, for STA1, power can be saved, and it can be consistent with the time point at which only STA2 parameters of the Beacon format of the 11ax format can be switched.

In addition, there is a special case where the AP only sends Beacons that are not in the 11ax format. In the case of BSS color switching, the first indication parameter is indicated as being in Beacon format other than 11ax format.

Figure 12 is a reference parameter field using the New BSS Color Information field to indicate a first indication parameter. In the example given here, the reference parameter is indicated by 1 bit. If set to 1, the Beacon in the 11ax format is taken as the standard, and 0 is set to be in the non-11ax format.

Application example 5:

In a wireless local area network, an access point AP associates two STAs: a first station (STA1) and a second station (STA2). The AP supports the dual beacon function: sending beacons in the 11ax format and beacons in the non-11ax format. STA1 can receive both beacons in the 11ax format and beacons in the non-11ax format. STA2 can only receive beacons in the 11ax format. The reason for the above situation may be that STA1 is closer to the AP, and STA2 is farther from the AP.

The AP selects a value as the BSS color of the BSS. During the life cycle of the BSS, the AP finds that its BSS color is the same as the BSS color of other BSSs, and there is a serious collision. The AP decides to perform BSS color switching. The AP indicates the first indication parameter (offset value) in the beacon of the 11ax format and the beacon of the non-11ax format. The time point at which the BSS color is switched calculated by the offset value indicated in the beacon format of the 11ax format and the beacon of the non-11ax format should be the same.

The first indication parameter (offset value) indicated by the AP in the beacon of the 11ax format or the beacon of the non-11ax format needs to ensure that the basic service set switching time calculated by the beacon according to which format should be the same.

The STA1 calculates the time point of switching the BSS color according to the parameters of the beacon of the 11ax format or the beacon of the non-11ax format: the TBTT+ offset value corresponding to the beacon frame currently carrying the offset value.

The STA2 calculates the time point of switching the BSS color according to the parameters of the beacon in the 11ax format: the TBTT+ offset value corresponding to the beacon frame currently carrying the offset value.

The time points calculated by STA1 and STA2 are the same. This way the site switches the BSS color at the same time.

As shown in FIG. 13, FIG. 13 is a schematic diagram showing a first indication parameter (offset value) carried by a Beacon in a Beacon in a 11ax format and a Beacon in a Beacon in a non-11ax format. The AP also carries the offset value in the other Beacons in the 11ax format and the Beacon in the non-11ax format. The offset values may be different. The AP needs to ensure that the basic service set switching time calculated by the offset values carried in all beacons is consistent. .

In addition, the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions that implement the method of the embodiments of the present disclosure when the computer executable instructions are executed.

The above computer readable storage medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform portions of the steps of the methods described in various embodiments of the present disclosure. The computer readable storage medium includes: a U disk, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above-mentioned serial numbers of the embodiments of the present disclosure are merely for the description, and do not represent the advantages and disadvantages of the embodiments. Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the embodiments of the present disclosure may be embodied in the form of a software product in essence or in a form of a software product stored in a storage medium (such as ROM/RAM, disk). The optical disc includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present disclosure.

The above description is only exemplary embodiments of the present disclosure, and is not intended to limit the present disclosure, and various changes and modifications may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (52)

A method for transmitting information, including: The access point generates a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is used to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter; The access point transmits the radio frame. The method of claim 1 wherein: The first indication parameter includes an offset value; the basic service set identifies a moment when the handover is the first handover time plus an offset value. The method of claim 2 wherein: The radio frame further includes a target beacon handover parameter, the target beacon handover parameter being a number of target beacon transmission moments that need to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. The method of claim 3 wherein: said first switching instant is determined based on said target beacon switching parameter. The method according to claim 2, wherein the first switching moment is a target beacon transmission time corresponding to a beacon frame carrying the first indication parameter. The method of claim 4, wherein the first switching moment is determined according to the target beacon switching parameter, comprising: the first switching moment is a beacon frame carrying a target beacon switching parameter of 0; Target beacon transmission time. The method of claim 1, wherein the wireless frame further comprises a second indication parameter, the second indication parameter being used to indicate whether the first indication parameter is present. The method of claim 1 wherein: The radio frame includes two or more formats, and the times at which the basic service set identifiers indicated in the two or more radio frames are switched are the same. The method of claim 1 wherein said radio frame information carrying a valid handover parameter comprises at least one of: a frame format, a sequence number, a bandwidth. The method of claim 9 wherein: said valid switching parameters comprise: target beacon switching parameters and/or offset values. A method according to any one of claims 1 to 10, wherein: The radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame. A method for basic service set identification switching includes: Receiving, by the station, a radio frame, where the radio frame includes a first indication parameter; The station corrects a basic service set identifier switching moment according to the first indication parameter, or determines a radio frame carrying a valid handover parameter according to the first indication parameter. The method of claim 12 wherein: The first indication parameter includes an offset value; the station performs basic service set identifier switching at a time when the first handover time is added with an offset value. The method of claim 12 wherein: the method further comprises: The station receives the radio frame carrying a valid handover parameter, and determines a basic service set identifier switching moment according to the effective handover parameter. The method of claim 13 wherein: The radio frame further includes a target beacon handover parameter, the target beacon handover parameter being a number of target beacon transmission moments that need to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. The method of claim 15 wherein: said first switching instant is determined based on said target beacon switching parameter. The method of claim 13 wherein: said first switching instant is a target beacon transmission time corresponding to a beacon frame carrying said first indication parameter. The method of claim 16, wherein: the first switching moment is determined according to the target beacon switching parameter, comprising: the first switching moment is a beacon frame carrying a target beacon switching parameter of 0; Target beacon transmission time. The method of claim 12 wherein: The radio frame further includes a second indication parameter, where the second indication parameter is used to indicate whether the first indication parameter exists. The method of claim 12 wherein: The radio frame includes two or more formats, and the times at which the basic service set identifiers indicated in the two or more radio frames are switched are the same. The method of claim 12 wherein: The radio frame information carrying the effective handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth. The method of claim 21 wherein: The valid handover parameters include: target beacon switching parameters and/or offset values. A method according to any one of claims 12 to 22, wherein: The radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame. An information transmitting device, comprising: a framing module, configured to generate a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is used to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter; And a sending module, configured to send the wireless frame. The apparatus of claim 24 wherein: The first indication parameter included in the radio frame generated by the framing module includes an offset value; the time when the basic service set identifier is switched is a first handover time plus an offset value. The apparatus of claim 25 wherein: The radio frame generated by the framing module further includes a target beacon switching parameter, where the target beacon switching parameter is a target beacon transmission that needs to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. The number of times. The apparatus of claim 26 wherein: The first switching moment is determined according to the target beacon switching parameter. The apparatus according to claim 25, wherein: said first switching moment is a target beacon transmission time corresponding to a beacon frame carrying said first indication parameter. The apparatus according to claim 27, wherein: said first switching moment is determined according to said target beacon switching parameter, comprising: said first switching moment being a beacon frame carrying a target beacon switching parameter of 0; Target beacon transmission time. The apparatus of claim 24, wherein: the radio frame generated by the framing module further comprises a second indication parameter, the second indication parameter being used to indicate whether the first indication parameter is present. The apparatus of claim 24 wherein: The radio frame generated by the framing module includes two or more formats, and the times at which the basic service set identifiers indicated in the two or more radio frames are switched are the same. The apparatus of claim 24 wherein: The radio frame generated by the framing module indicates that the radio frame information carrying the valid handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth. The apparatus of claim 32 wherein: The valid handover parameters include: target beacon switching parameters and/or offset values. A device according to any of claims 24 to 33, wherein: The radio frame generated by the framing module includes a beacon frame or a unicast radio frame or a broadcast radio frame. An access point comprising the information transmitting apparatus according to any one of claims 24 to 34. A device for identifying a basic service set identifier, wherein: a receiving module, configured to receive a radio frame, where the radio frame includes a first indication parameter; And the processing module is configured to: correct a basic service set identifier switching moment according to the first indication parameter, or determine a radio frame carrying the valid handover parameter according to the first indication parameter. The apparatus of claim 36 wherein: The first indication parameter included in the radio frame received by the receiving module includes an offset value; and the station performs basic service set identifier switching at a time when the first switching moment is added with an offset value. The apparatus of claim 36 wherein: The receiving module is further configured to receive the radio frame carrying the valid handover parameter, and the processing module is further configured to determine a basic service set identifier switching time according to the valid handover parameter. The apparatus of claim 37 wherein: The radio frame received by the receiving module further includes a target beacon switching parameter, where the target beacon switching parameter is a target beacon transmission moment that needs to continue to maintain the old basic service set identifier before switching to the new basic service set identifier. Number of. The apparatus of claim 39, wherein: said first switching instant is determined based on said target beacon switching parameter. The apparatus according to claim 37, wherein: said first switching moment is a target beacon transmission time corresponding to a beacon frame carrying said first indication parameter. The apparatus according to claim 40, wherein: said first switching moment is determined according to said target beacon switching parameter, comprising: said first switching moment being a beacon frame carrying a target beacon switching parameter of 0; Target beacon transmission time. The apparatus of claim 36 wherein: The radio frame received by the receiving module further includes a second indication parameter, where the second indication parameter is set to indicate whether the first indication parameter exists. The apparatus of claim 36 wherein: The radio frame received by the receiving module includes two or more formats, and the times at which the basic service set identifiers indicated in the two or more radio frames are switched are the same. The apparatus of claim 36 wherein: The radio frame received by the receiving module indicates that the radio frame information carrying the valid handover parameter includes at least one of the following: a frame format, a sequence number, and a bandwidth. The apparatus of claim 45 wherein: The valid handover parameters include: target beacon switching parameters and/or offset values. A device according to any of claims 36 to 46, wherein: The radio frame received by the receiving module includes a beacon frame or a unicast radio frame or a broadcast radio frame. [Correct according to Rule 26 05.03.2018]
A station, comprising the apparatus for basic service set identity switching as claimed in any one of claims 36 to 47. A system for basic service set identity switching, including: Access point, including, a framing module, configured to generate a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is used to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter; a sending module, configured to send the wireless frame; The switching module is configured to perform basic service set identifier switching according to the first indication parameter; Site, including, a receiving module, configured to receive the radio frame; And the processing module is configured to: correct a basic service set identifier switching moment according to the first indication parameter, or determine a radio frame carrying the valid handover parameter according to the first indication parameter. A method for basic service set identification switching, comprising: The access point generates a radio frame, where the radio frame includes a first indication parameter, where the first indication parameter is used to correct a time when the basic service set identifier is switched or to indicate radio frame information carrying a valid handover parameter; The access point sends the radio frame; The access point performs basic service set identifier switching according to the first indication parameter; Receiving, by the station, the radio frame; The station corrects the basic service set identifier switching moment according to the first indication parameter, or determines a radio frame carrying the valid handover parameter according to the first indication parameter. A computer readable storage medium storing computer executable instructions that, when executed, implement the method of claims 1-11. A computer readable storage medium storing computer executable instructions that, when executed, implement the method of claims 12-23.

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