WO2018153157A1 - 一种信息发送方法及装置 - Google Patents

一种信息发送方法及装置 Download PDF

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Publication number
WO2018153157A1
WO2018153157A1 PCT/CN2017/118511 CN2017118511W WO2018153157A1 WO 2018153157 A1 WO2018153157 A1 WO 2018153157A1 CN 2017118511 W CN2017118511 W CN 2017118511W WO 2018153157 A1 WO2018153157 A1 WO 2018153157A1
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WIPO (PCT)
Prior art keywords
switching
parameter
radio frame
service set
basic service
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PCT/CN2017/118511
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English (en)
French (fr)
Inventor
韩志强
方勇刚
吕开颖
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中兴通讯股份有限公司
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Publication of WO2018153157A1 publication Critical patent/WO2018153157A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a method for basic service set identity switching 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.
  • 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.
  • 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.
  • a station including the apparatus for marking the basic service set identity described above.
  • a system for basic service set identification switching 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 .
  • a method for basic service set identification handover 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 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.
  • the erroneous operation of spatial multiplexing of the sites in the BSS can be reduced, and the transmission can be effectively performed.
  • FIG. 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;
  • FIG. 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;
  • FIG. 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;
  • FIG. 4 is a flowchart of an information sending method for basic service set identifier switching according to an embodiment of the present disclosure
  • FIG. 5 is a flowchart of a method for switching basic service set identifiers according to Embodiment 2 of the present disclosure
  • FIG. 6 is a block diagram of an information transmitting apparatus for basic service set identifier switching according to Embodiment 3 of the present disclosure
  • FIG. 7 is a structural diagram of an apparatus for basic service set identifier switching according to Embodiment 4 of the present disclosure.
  • FIG. 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
  • FIG. 10 is a schematic diagram showing an increase in offset value in Application Example 3 of the present disclosure.
  • FIG. 11 is a schematic diagram showing an increase of a second indication parameter in Application Example 3 of the present disclosure.
  • FIG. 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.
  • 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 .
  • 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.
  • the first station STA1 performs information switching according to the first beacon frame in the non-11ax format
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 4 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.
  • the access point 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.
  • the access point transmits a radio frame.
  • 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.
  • 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.
  • TBTT target beacon transmission times
  • 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.
  • 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.
  • the first switching moment may also be other time points, which is not limited by the embodiment of the present disclosure.
  • 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.
  • 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.
  • 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 radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 5 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.
  • step 501 the station receives a radio frame, the radio frame including a first indication parameter.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the first switching moment is determined according to the target beacon switching parameter.
  • the first switching moment is a target beacon transmission time corresponding to the beacon frame carrying the first indication parameter.
  • 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. .
  • 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 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.
  • 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 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.
  • the radio frame includes a beacon frame or a unicast radio frame or a broadcast radio frame.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 6 is a block diagram of an information sending apparatus according to Embodiment 3 of the present disclosure.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the effective handover parameters include: a target beacon switching parameter and/or an offset value.
  • 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 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 is a diagrammatic representation of Embodiment 4:
  • 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.
  • 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 receiving module is further configured to receive a radio frame carrying a valid handover parameter
  • the processing module is further configured to determine a basic service set identifier switching moment according to the effective handover parameter
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 effective handover parameters include: a target beacon switching parameter and/or an offset value.
  • the radio frame received by the receiving module includes a beacon frame or a unicast radio frame or a broadcast radio frame.
  • 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.
  • 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
  • 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.
  • 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.
  • the receiving module is further configured to receive a radio frame carrying a valid handover parameter
  • 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.
  • 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.
  • 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.
  • 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.
  • the first format is a non-11ax format
  • the second format is a 11ax format.
  • the actual application can also include beacons in other formats.
  • 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
  • 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.
  • 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) is the same.
  • 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.
  • the offset values indicated by the first beacon frame Beacon-1 and the second beacon frame Beacon-2, respectively, may not be zero.
  • 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.
  • BI is Beacon Interval.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • the offset values indicated by the first beacon frame Beacon-1 and the second beacon frame Beacon-2, respectively, may not be zero.
  • 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 above-mentioned obtaining method may have a deviation in practical applications.
  • the access point AP supports the dual beacon function: sending beacons in the 11ax format and beacons in the non-11ax format.
  • 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
  • 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.
  • 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.
  • 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.
  • the first indication parameter indicates that the parameter in the Beacon in the 11ax format is taken as the standard.
  • 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.
  • the first indication parameter indicates that the Beacon in the 11ax format is used.
  • STA1 can receive the Beacon in the 11ax format.
  • 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.
  • the AP only sends Beacons that are not in the 11ax format.
  • 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.
  • 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.
  • 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.
  • 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. .
  • 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. .

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Abstract

一种信息发送方法及装置,所述信息发送方法,包括:接入点生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;所述接入点发送所述无线帧。本申请实施例通过设置第一指示参数,确定基本服务集标识切换的时刻,实现对基本服务集标识切换的时间进行控制,进而实现根据所述指示参数进行基本服务集标识切换,从而解决了相关技术存在的不同接入点基本服务集标识相同的问题。本公开实施例实现了不同格式的无线帧指示的基本服务集标识切换的时刻相同。可以减少本基本服务集内站点进行空间复用的误操作,保证传输的有效进行。

Description

一种信息发送方法及装置 技术领域
本公开涉及通信技术,特别是无线局域网技术领域,更具体地,涉及一种信息发送方法及装置。
背景技术
随着WLAN网络的爆发性应用,WLAN网络的部署不断密集化,网络负载也在不断加重,且随着网络的增加,网络覆盖重叠的情况也更加严重。WLAN网络的效率会出现明显下降的趋势,单纯靠提高空口速率并不能解决该问题。因此,IEEE标准组织成立了相关的任务小组致力于解决WLAN网络效率问题。其中,网络密集部署情况下的干扰避免和效率提升的技术成为讨论的热点。
为了能够让站点在接收完无线帧之前,提前识别出是不是本基本服务集(Basic Service Set,BSS)的无线帧,定义了BSS color,作为基本服务集的标识,用于进行BSS的区别。一个BSS只有一个BSS color。在无线局域网通信标准802.11ax(以下简称11ax)中,BSS color占用6比特,能够指示0-63,一共64种标识。由于11ax定义的是密集网络的应用技术而且存在隐藏终端,接入点(Access Point,AP)在进行BSS color选择时,很可能选择的BSS color和其他AP选择的BSS color相同,如图1所示。第一接入点AP1和第二接入点AP2互为隐藏终端。第一接入点AP1和第二接入点AP2在BSS建立的时候,即使进行网络扫描,由于相互不在彼此的通信范围,第一接入点AP1和第二接入点AP2选择的BSS color有可能是相同的,在密集场景下,该问题尤其严重。
发明内容
有鉴于此,本公开提供了以下方案。
根据本公开的第一方面,提供了一种信息发送方法,包括:接入点生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数设置为校正基本服务集标识切换的时刻或设置为指示携带有效切换参数的无线帧信息;所述接入点发送所述无线帧。
根据本公开的第二方面,提供了一种基本服务集标识切换的方法,包括:站点接收无线帧,所述无线帧中包括第一指示参数;所述站点根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
根据本公开的第三方面,提供了一种信息发送装置,包括:组帧模块,设置为生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数设置为校正基本服务集标识切换的时刻或设置为指示携带有效切换参数的无线帧信息;发送模块,设置为发送所述无线帧。
本公开还提供了一种接入点,包括上述信息发送装置。
根据本公开的第四方面,提供了一种基本服务集标识切换的装置,包括:接收模块,设 置为接收无线帧,所述无线帧中包括第一指示参数;处理模块,设置为根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
本公开还提供了一种站点,包括上述基本服务集标识切换的装置。根据本公开的第五方面,提供了一种用于基本服务集标识切换的***,包括接入点和站点。接入点包括:组帧模块,设置为生成无线帧,所述无线帧中包括第一指示参数,所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;发送模块,设置为发送所述无线帧;切换模块,设置为根据所述第一指示参数进行基本服务集标识切换。站点包括:接收模块,设置为接收所述无线帧;处理模块,设置为根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
根据本公开的第六方面,提供了一种用于基本服务集标识切换的方法,包括:接入点生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;接入点发送所述无线帧;接入点根据所述第一指示参数进行基本服务集标识切换;站点接收所述无线帧;站点根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
本公开实施例还提供一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令被执行时实现上述方法。
上述方案通过接入点生成无线帧,所述无线帧中包括指示基本服务集标识切换的第一指示参数,接入点或者站点根据所述第一指示参数进行基本服务集标识切换,从而通过设置第一指示参数,确定基本服务集标识切换的时刻,实现对基本服务集标识切换的时间进行控制,进而实现基本服务集标识切换,从而解决了相关技术存在的不同接入点基本服务集标识相同的问题。本公开实施例通过将第一指示参数设置为偏移值,在第一切换时刻加偏移值指示的时刻,切换成新的基本服务集标识;或者在携带所述第一指示参数的信标帧对应的目标信标传输时刻加偏移值指示的时刻,切换成新的基本服务集标识;或者,所述第一指示参数指示携带有效切换参数的无线帧信息,根据所述携带有效切换参数的无线帧所指示的目标信标切换参数和/或偏移值进行基本服务集标识切换,从而实现了不同格式的无线帧指示的基本服务集标识切换的时刻相同,这个切换的时刻可以存在一定误差,但是这个误差不影响***性能和传输。本公开实施例解决了双信标甚至多信标情况下基本服务集标识切换时间不一致的问题。通过本公开的实施例,可以减少本BSS内站点进行空间复用的误操作,保证传输的有效进行。
附图说明
图1为相关技术中第一接入点AP1和第二接入点AP2选择的BSS color相同的情况示意图;
图2为接入点在信标帧中或者通过单播帧通知站点在多少个TBTT后进行BSS color切 换的示意图;
图3为当采用双Beacon的发送方法时,存在一段时间BSS内一部分站点的BSS color与另一部分站点的BSS color不同的情况示意图;
图4是本公开实施例一用于基本服务集标识切换的信息发送方法的流程图;
图5是本公开实施例二的基本服务集标识切换的方法流程图;
图6是本公开实施例三用于基本服务集标识切换的信息发送装置的模块图;
图7是本公开实施例四的用于基本服务集标识切换的装置结构图;
图8是本公开应用实例1当接入点支持dual beacon功能时BSS color切换的示意图;
图9是本公开应用实例2当接入点支持dual beacon功能时BSS color切换的示意图;
图10是本公开应用实例3中偏移值增加示意图;
图11是本公开应用实例3中第二指示参数增加示意图;
图12是本公开应用实例4中基准参数增加示意图;
图13是本公开应用实例5中第一指示参数(偏移值)指示切换的示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚明白,下文中将结合附图对本公开的实施例进行详细说明。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互任意组合。
为了克服相关技术中不同接入点选择的BSS color相同的情况所带来的弊端,定义了BSS color切换的规则。接入点AP在信标帧中或者通过单播帧通知STA(站点)在多少个目标信标传输时刻(target beacon transmission time,TBTT)后进行BSS Color切换,如图2所示。
此外,为了增加覆盖范围,增加传输可靠性,定义了双Beacon(dual beacon,双信标)的发送方法,一种Beacon以非11ax的格式发送,一种以11ax的格式发送。
如果将上述BSS color切换的方法应用到双Beacon的发送方法中时,会存在一部分站点切换到新BSS color,另一部分站点没有切换到新Color的问题,如图3所示。第一站点STA1根据非11ax格式的第一信标帧进行信息切换,第二站点STA2根据11ax格式的第二信标帧进行信息切换,那么就会存在一段时间(第一信标帧Beacon-1(Count1=0)到第二信标帧Beacon-2(Count2=0)),BSS内一部分站点使用旧的BSS color,另一部分站点使用新的BSS color,造成BSS内的空间复用,干扰当前传输。
实施例一:
参照图4所示,为本公开实施例一的信息发送方法流程图,本实施例的方法应用于接入点,该方法包括以下步骤。
在步骤401,接入点生成无线帧,无线帧中包括第一指示参数;第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息。
在步骤402,接入点发送无线帧。
在本实施例中,可选的,第一指示参数包括偏移值;基本服务集标识切换的时刻为第一 切换时刻加上偏移值。
在本实施例中,可选的,无线帧中还包括目标信标切换参数,目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。例如,当目标信标切换参数设置为2,表示还需要等待2个目标信标传输时刻(TBTT)才能进行BSS color的切换。
可选的,第一切换时刻根据目标信标切换参数确定,或者第一切换时刻为携带第一指示参数的信标帧对应的目标信标传输时刻。第一切换时刻为参考基准,偏移值及参考基准的值,在应用中可根据实际情况由接入点进行确定。
在本实施例中,可选的,第一切换时刻根据目标信标切换参数确定,包括:第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。当然,此处仅仅为一种示例,在实际应用中,第一切换时刻,也可以为其他的时间点,本公开实施例对此不加以限定。
在本实施例中,可选的,该方法还包括:该无线帧中还包括第二指示参数,该第二指示参数用于指示第一指示参数是否存在。
在本实施例中,可选的,该无线帧包括两种或两种以上格式,并且该两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
在本实施例中,可选的,该携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
在本实施例中,可选的,该无线帧包括信标帧或者单播无线帧或者广播无线帧。
实施例二:
参照图5所示,为本公开实施例二的基本服务集标识切换的方法流程图,本实施例的方法应用于站点,该方法包括以下步骤。
在步骤501,站点接收无线帧,该无线帧中包括第一指示参数。
在步骤502,该站点根据该第一指示参数校正基本服务集标识切换时刻,或者根据该第一指示参数确定携带有效切换参数的无线帧。
在本实施例中,可选的,该第一指示参数包括偏移值;该站点在第一切换时刻加上偏移值的时刻进行基本服务集标识切换。
在本实施例中,可选的,该方法还包括:该站点接收携带有效切换参数的无线帧,并根据该有效切换参数确定基本服务集标识切换时刻。
在本实施例中,可选的,该无线帧中还包括目标信标切换参数,该目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
在本实施例中,可选的,该第一切换时刻根据目标信标切换参数确定。或者,可选的,该第一切换时刻为携带第一指示参数的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,该第一切换时刻根据目标信标切换参数确定,包括:该第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,无线帧中还包括第二指示参数,该第二指示参数用于指示第一指示参数是否存在。
在本实施例中,可选的,无线帧包括两种或两种以上格式,并且该两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
在本实施例中,可选的,携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
在本实施例中,可选的,有效切换参数是指以参数确定基本服务局集标识切换时刻,该有效切换参数包括:目标信标切换参数和/或偏移值。
在本实施例中,可选的,无线帧包括信标帧或者单播无线帧或者广播无线帧。
实施例三:
图6是本公开实施例三的信息发送装置的模块图,在本实施例中,该装置应用于接入点中,该装置包括:组帧模块和发送模块。
组帧模块设置为生成无线帧,该无线帧中包括第一指示参数;该第一指示参数设置为校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息。
发送模块设置为发送无线帧。
在本实施例中,可选的,组帧模块生成的无线帧包括的第一指示参数包括偏移值;基本服务集标识切换的时刻为第一切换时刻加上偏移值。
在本实施例中,可选的,组帧模块生成的无线帧中还包括目标信标切换参数,该目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
在本实施例中,可选的,第一切换时刻根据目标信标切换参数确定,或者,可选的,第一切换时刻为携带第一指示参数的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,第一切换时刻根据目标信标切换参数确定,包括:第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,组帧模块生成的无线帧还包括第二指示参数,该第二指示参数用于指示第一指示参数是否存在。
在本实施例中,可选的,组帧模块生成的无线帧包括两种或两种以上格式,并且该两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
在本实施例中,可选的,组帧模块生成的无线帧携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
在本实施例中,可选的,有效切换参数包括:目标信标切换参数和/或偏移值。
在本实施例中,可选的,组帧模块生成的无线帧包括信标帧或者单播无线帧或者广播无线帧。
在本实施例中,还提供了一种接入点,包括以上描述的信息发送装置,关于接入点的描述细节,参照上述对信息发送装置的描述。
实施例四:
参照图7所示,为本公开实施例四的基本服务集标识切换的装置结构图,本实施例的装置应用于站点,该装置包括:接收模块和处理模块。
接收模块设置为接收无线帧,该无线帧中包括第一指示参数。
处理模块设置为根据该第一指示参数校正基本服务集标识切换时刻,或者根据该第一指示参数确定携带有效切换参数的无线帧。
在本实施例中,可选的,接收模块接收的无线帧包括的第一指示参数包括偏移值;站点在第一切换时刻加上偏移值的时刻进行基本服务集标识切换。
在本实施例中,可选的,接收模块,还设置为接收携带有效切换参数的无线帧;处理模块,还设置为根据有效切换参数确定基本服务集标识切换时刻。
在本实施例中,可选的,接收模块接收的无线帧中还包括目标信标切换参数,该目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
在本实施例中,可选的,第一切换时刻根据目标信标切换参数确定,或者,可选的,第一切换时刻为携带第一指示参数的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,第一切换时刻根据目标信标切换参数确定,包括:第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
在本实施例中,可选的,接收模块接收的无线帧中还包括第二指示参数,该第二指示参数用于指示第一指示参数是否存在。
在本实施例中,可选的,接收模块接收的无线帧包括两种或两种以上格式,并且该两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
在本实施例中,可选的,接收模块接收的无线帧指示携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
在本实施例中,可选的,有效切换参数包括:目标信标切换参数和/或偏移值。
在本实施例中,可选的,接收模块接收的无线帧包括信标帧或者单播无线帧或者广播无线帧。
在本实施例中,还提供了一种站点,包括以上描述的基本服务集标识切换的装置,关于站点的描述细节,参照上述对基本服务集标识切换的装置的描述。
本公开实施例还提供了一种用于基本服务集标识切换的***,包括接入点和站点。
接入点包括:组帧模块,设置为生成无线帧,该无线帧中包括第一指示参数;该第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;发送模块,设置为发送该无线帧;切换模块,设置为根据该第一指示参数进行基本服务集标识切换。
站点包括:接收模块,设置为接收无线帧;处理模块,设置为根据第一指示参数校正基本服务集标识切换时刻,或者根据该第一指示参数确定携带有效切换参数的无线帧。
可选的,组帧模块生成的无线帧包括的第一指示参数包括偏移值;基本服务集标识切换的时刻为第一切换时刻加上偏移值。
可选的,接收模块,还设置为接收携带有效切换参数的无线帧;处理模块,还设置为根据有效切换参数确定基本服务集标识切换时刻。
本公开实施例还提供了一种用于基本服务集标识切换的方法,包括:接入点生成无线帧,无线帧中包括第一指示参数;该第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;接入点发送该无线帧;接入点根据第一指示参数进行基本服务集标识切换;站点接收无线帧;以及站点根据第一指示参数校正基本服务集标识切换时刻,或者根据第一指示参数确定携带有效切换参数的无线帧。
可选的,第一指示参数包括偏移值;基本服务集标识切换的时刻为第一切换时刻加上偏移值。
可选的,该方法还包括:站点接收携带有效切换参数的无线帧,并根据有效切换参数确定基本服务集标识切换时刻。
上述用于基本服务集标识切换的***及用于基本服务集标识切换的方法的其他方面可以参照本公开实施例一至实施例四的详细描述,在此不再赘述。
下面通过实例对本公开技术方案进行示例性说明。
应用实例1:
在无线局域网中,接入点AP关联了两个STA:第一站点(STA1)和第二站点(STA2)。AP支持dual beacon功能:发送第一格式的beacon和第二格式的beacon。在本应用实例中,第一格式为非11ax格式,第二格式为11ax格式。当然,实际应用中也可以包括其他格式的beacon。
在本应用实例中,第一站点STA1根据第一格式(非11ax格式)的第一信标帧(Beacon-1)的参数进行操作,第二站点STA2根据第二格式(11ax格式)的第二信标帧(Beacon-2)的参数进行操作。
AP选择了某个值作为本BSS的BSS color。在BSS的生命周期内,AP发现自己的BSS color和其他BSS的BSS color相同,存在较为严重的碰撞。AP决定进行BSS color切换。AP在11ax格式的beacon和非11ax格式的beacon中指示目标信标切换参数和第一指示参数(偏移值)。其中,目标信标切换参数用于指示接入点和站点在切换到新的BSS color之前需要继续保持旧的BSS color的TBTT的数目。偏移值用于指示相对于携带目标信标切换参数等于0的信标帧对应的TBTT的偏移时间。其中,携带目标指示切换参数等于0的信标帧对应的TBTT是第一切换时刻。这样AP和站点进行基本服务集标识切换的时刻就是第一切换时刻加偏移值对应的时刻。
通过本应用实例的方法,11ax格式的beacon和非11ax格式的beacon指示的Color切换的时刻点相同。如图8所示,第二格式(11ax格式)的第二信标帧(Beacon-2)和第一格式(非11ax格式)的第一信标帧(Beacon-1)发送的信标间隔(Beacon interval,BI)相同,AP发现自己的BSS color和其他BSS的BSS color相同,决定进行BSS color切换。第一信标帧Beacon-1通知第一信标帧Beacon-1的目标信标切换参数和第一指示参数(偏移值);第二信标帧Beacon-2通知第二信标帧Beacon-2的目标信标切换参数和第一指示参数(偏移 值)。
图8描述了一个特例,由于第一信标帧Beacon-1的目标信标切换参数等于0对应的TBTT比第二信标帧Beacon-2的目标信标切换参数等于0对应的TBTT早。因此,第一信标帧Beacon-1指示的偏移值不为0,设置为第二信标帧Beacon-2的目标信标切换参数等于0对应的TBTT和第一信标帧Beacon-1的目标信标切换参数等于0对应的TBTT的时间差。而第二信标帧Beacon-2指示的偏移值为0。这样收到第一信标帧Beacon-1进行BSS color切换的第一时刻点和收到第二信标帧Beacon-2进行BSS color切换的第二时刻点相同。需要说明的是,切换的时刻点相同,由于时钟精度,接收时延,处理时延等因素的影响,可能会造成一定的偏差。本公开实施例所述切换的时刻点相同,是指第一时刻点和第二时刻点之间可能存在允许范围内的时间差。
这里,第一信标帧Beacon-1和第二信标帧Beacon-2分别指示的偏移值可以都不是0。这里Count1和Count2表示的是目标信标切换参数。图8中的Count1=2,即目标信标切换参数表示还需要等待2个TBTT才能进行BSS color的切换。
STA1在听到Count1=2的第一信标帧Beacon-1后,可以不继续侦听后续的第一信标帧,根据第一信标帧Beacon-1的目标信标切换参数和偏移值获得BSS color切换的时刻。获得方法为:当前第一信标帧Beacon-1对应的TBTT+目标信标切换参数*BI+偏移值。其中,BI为Beacon Interval(信标间隔)。
应用实例2:
在无线局域网中,接入点AP关联了两个STA:第一站点(STA1)和第二站点(STA2)。AP支持dual beacon功能:发送11ax格式的beacon和非11ax格式的beacon。STA1根据非11ax格式的第一信标帧(Beacon-1)的参数进行操作,STA2根据11ax格式的第二信标帧(Beacon-2)的参数进行操作。AP选择了某个值作为本BSS的BSS color。在BSS的生命周期内,AP发现自己的BSS color和其他BSS的BSS color相同,存在较为严重的碰撞。AP决定进行BSS color切换。AP在11ax格式的beacon和非11ax格式的beacon中指示目标信标切换参数和第一指示参数(偏移值)。其中,目标信标切换参数用于指示接入点和站点在切换到新的BSS color之前需要继续保持旧的BSS color的TBTT的数目。偏移值用于指示相对于携带目标信标切换参数等于0的信标帧对应的TBTT的偏移时间。其中,携带目标指示切换参数等于0的信标帧对应的TBTT是第一切换时刻。这样AP和站点进行基本服务集标识切换的时刻就是第一切换时刻加偏移值对应的时刻。
通过本实施例的方法,11ax格式的beacon和非11ax格式的beacon指示的Color切换的时刻点相同。如图9所示,11ax格式的beacon(第二信标帧,Beacon-2)和非11ax格式的beacon(第一信标帧,Beacon-1)发送的Beacon Interval不相同。AP发现自己的BSS Color和其他BSS的BSS Color相同,决定进行BSS Color切换。Beacon-1通知Beacon-1的目标信标切换参数和偏移值;Beacon-2通知Beacon-2的目标信标切换参数和偏移值。图9描述了一个特例,Beacon-1指示的偏移值为0,而Beacon-2指示的偏移值不为0。这样收到Beacon-1进行BSS color切换的时刻点和收到Beacon-2进行BSS color切换的时刻点相同。
这里,第一信标帧Beacon-1和第二信标帧Beacon-2分别指示的偏移值可以都不是0。这里Count1和Count2表示的是目标信标切换参数。图8中的Count1=2,即目标信标切换参数表示还需要等待2个TBTT才能进行BSS color的切换。
STA1在听到Count1=2的第一信标帧Beacon-1后,可以不继续侦听后续的信标帧,根据第一信标帧Beacon-1的目标信标切换参数和偏移值来获得到BSS color切换的时刻。获得方法为:当前Count1=2的Beacon-1对应的TBTT+目标信标切换参数*BI+偏移值。
上述的获得方法在实际应用中可能存在偏差,比如当前Count1=2的Beacon-1对应的TBTT,在计算时可能不捕获TBTT时间,以当前Beacon-1接收完的时刻来代替上述TBTT。这样使得最终计算的结果可能存在偏差,但是属于可以考虑的范围。
应用实例3:
在无线局域网中,接入点AP支持dual beacon功能:发送11ax格式的beacon和非11ax格式的beacon。在BSS的生命周期内,AP发现自己的BSS color和其他BSS的BSS color相同,存在较为严重的碰撞。AP决定进行BSS color切换。AP通过单播无线帧或广播无线帧通知站点BSS Color切换的参数。AP通过单播无线帧或广播无线帧通知BSS color切换的参数使用的格式如图10所示。其中,Color Switch Countdown(颜色切换倒计时)对应目标信标切换参数,Color Switch Offset(颜色切换偏移)对应第一指示参数(偏移值)。Color Switch Offset域的长度可以根据单位的不同来设计。如果这个域的单位是1微秒(us),则为了能够指示的时间足够长,需要的比特数就比较多。如果采用2个字节,那么以8微秒或16us为单位是一个合适的取值。Color Switch Offset域的长度和单位可以是其他值。此外,为了减少开销,可以在Color Switch Offset域之前使用一些比特先指示出Color Switch Offset域是否存在,这个指示即为第二指示参数。图11是采用New BSS Color Information(新BSS Color信息)域的1比特来指示Color Switch Offset域是否存在。如果指示Color Switch Offset域不存在,那么隐含指示Color Switch Offset域指示的值为0。
应用实例4:
在无线局域网中,接入点AP关联了两个STA:第一站点(STA1)和第二站点(STA2)。AP支持dual beacon功能:发送11ax格式的beacon和非11ax格式的beacon。STA1既能收到11ax格式的beacon和非11ax格式的beacon。STA2只能收到11ax格式的beacon。造成上述情况的原因可能是由于STA1距离AP较近,而STA2距离AP较远。
AP选择了某个值作为本BSS的BSS color。在BSS的生命周期内,AP发现自己的BSS color和其他BSS的BSS color相同,存在较为严重的碰撞,AP决定进行BSS color切换。AP在11ax格式的beacon和非11ax格式的beacon中指示目标信标切换参数和第一指示参数(用于指示携带有效切换参数的无线帧)。其中,目标信标切换参数用于指示接入点和站点在切换到新的BSS color之前需要继续保持旧的BSS color的TBTT的数目。第一指示参数用于指示以非11ax格式beacon的目标信标切换参数为准还是以11ax格式Beacon帧为准。
比如在本场景中,由于STA2只能收到11ax格式的Beacon,而STA1既能收到11ax格式的Beacon和非11ax格式的Beacon。因此,可以在非11ax格式的Beacon中,第一指示参 数指示以11ax格式的Beacon中的参数为准。在11ax格式的Beacon中,第一指示参数指示以11ax格式的Beacon中的参数为准。
STA1可以只接收其中一类Beacon,比如非11ax格式的Beacon,在非11ax格式的Beacon中,发现第一指示参数指示以11ax格式的Beacon为准,这样,STA1可以再去接收11ax格式的Beacon。这样,对于STA1来说,既可以节省功率,又可以和只能接收11ax格式Beacon的STA2参数切换的时刻点保持一致。
此外,还存在一种特例,即AP只发送非11ax格式的Beacon。在BSS color切换的情况下,将第一指示参数指示为以非11ax格式的Beacon为准即可。
图12是采用New BSS Color Information域的基准参数域来指示第一指示参数。这里举的例子,基准参数采用1比特指示,如果置1表示以11ax格式的Beacon为准,置0表示以非11ax格式的Beacon为准。
应用实例5:
在无线局域网中,接入点AP关联了两个STA:第一站点(STA1)和第二站点(STA2)。AP支持dual beacon功能:发送11ax格式的beacon和非11ax格式的beacon。STA1既能收到11ax格式的beacon和非11ax格式的beacon。STA2只能收到11ax格式的beacon。造成上述情况的原因可能是由于STA1距离AP较近,而STA2距离AP较远。
AP选择了某个值作为本BSS的BSS color。在BSS的生命周期内,AP发现自己的BSS color和其他BSS的BSS color相同,存在较为严重的碰撞,AP决定进行BSS color切换。AP在11ax格式的beacon和非11ax格式的beacon中指示第一指示参数(偏移值)。11ax格式的beacon和非11ax格式的beacon中指示的偏移值计算出的切换BSS color的时刻点应相同。
AP在发送11ax格式的beacon或非11ax格式的beacon中指示的第一指示参数(偏移值)需要保证不管根据哪种格式的beacon计算出的基本服务集切换时刻都应该是同一个。
STA1根据11ax格式的beacon或非11ax格式的beacon的参数计算切换BSS color的时刻点:当前携带偏移值的beacon帧对应的TBTT+偏移值。
STA2根据11ax格式的beacon的参数计算切换BSS color的时刻点:当前携带偏移值的beacon帧对应的TBTT+偏移值。
STA1和STA2计算的时刻点相同。这样站点在同一时刻点切换BSS color。
如图13所示,图13只是描述了11ax格式的Beacon中的一个Beacon和非11ax格式的Beacon中的一个Beacon分别携带的第一指示参数(偏移值)的示意图。AP在其他11ax格式的Beacon中和非11ax格式的Beacon中也携带偏移值,这些偏移值可能各不相同,AP需要保证所有beacon中携带的偏移值计算出来的基本服务集切换时刻一致。
此外,本申请实施例还提供一种计算机可读存储介质,存储有计算机可执行指令,该计算机可执行指令被执行时实现本公开实施例的方法。
上述计算机可读存储介质,包括若干指令用以使得一台计算机装置(可以是个人计算机,服务器,或者网络装置等)或处理器(Processor)执行本公开各个实施例所述方法的部分步 骤。而该计算机可读存储介质包括:U盘、移动硬盘、只读存储器(ReadOnly Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
上述本公开实施例序号仅仅为了描述,不代表实施例的优劣。通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本公开实施例的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端设备(可以是手机,计算机,服务器,或者网络设备等)执行本公开各个实施例所述的方法。
以上所述仅为本公开的示例性实施例,并不用于限制本公开,对于本领域的技术人员来说,本公开可以有各种更改和变化。凡在本公开的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本公开的保护范围之内。

Claims (52)

  1. 一种信息发送方法,包括:
    接入点生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;
    所述接入点发送所述无线帧。
  2. 如权利要求1所述的方法,其中:
    所述第一指示参数包括偏移值;所述基本服务集标识切换的时刻为第一切换时刻加上偏移值。
  3. 如权利要求2所述的方法,其中:
    所述无线帧中还包括目标信标切换参数,所述目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
  4. 如权利要求3所述的方法,其中:所述第一切换时刻根据所述目标信标切换参数确定。
  5. 如权利要求2所述的方法,所述第一切换时刻为携带所述第一指示参数的信标帧对应的目标信标传输时刻。
  6. 如权利要求4所述的方法,其中:所述第一切换时刻根据所述目标信标切换参数确定,包括:所述第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
  7. 如权利要求1所述的方法,其中:所述无线帧中还包括第二指示参数,所述第二指示参数用于指示第一指示参数是否存在。
  8. 如权利要求1所述的方法,其中:
    所述无线帧包括两种或两种以上格式,并且所述两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
  9. 如权利要求1所述的方法,其中:所述携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
  10. 如权利要求9所述的方法,其中:所述有效切换参数包括:目标信标切换参数和/或偏移值。
  11. 如权利要求1至10中任意一项所述的方法,其中:
    所述无线帧包括信标帧或者单播无线帧或者广播无线帧。
  12. 一种基本服务集标识切换的方法,包括:
    站点接收无线帧,所述无线帧中包括第一指示参数;
    所述站点根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
  13. 如权利要求12所述的方法,其中:
    所述第一指示参数包括偏移值;所述站点在第一切换时刻加上偏移值的时刻进行基本 服务集标识切换。
  14. 如权利要求12所述的方法,其中:所述方法还包括:
    所述站点接收所述携带有效切换参数的无线帧,并根据所述有效切换参数确定基本服务集标识切换时刻。
  15. 如权利要求13所述的方法,其中:
    所述无线帧中还包括目标信标切换参数,所述目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
  16. 如权利要求15所述的方法,其中:所述第一切换时刻根据所述目标信标切换参数确定。
  17. 如权利要求13所述的方法,其中:所述第一切换时刻为携带所述第一指示参数的信标帧对应的目标信标传输时刻。
  18. 如权利要求16所述的方法,其中:所述第一切换时刻根据所述目标信标切换参数确定,包括:所述第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
  19. 如权利要求12所述的方法,其中:
    所述无线帧中还包括第二指示参数,所述第二指示参数用于指示第一指示参数是否存在。
  20. 如权利要求12所述的方法,其中:
    所述无线帧包括两种或两种以上格式,并且所述两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
  21. 如权利要求12所述的方法,其中:
    所述携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
  22. 如权利要求21所述的方法,其中:
    所述有效切换参数包括:目标信标切换参数和/或偏移值。
  23. 如权利要求12至22中任意一项所述的方法,其中:
    所述无线帧包括信标帧或者单播无线帧或者广播无线帧。
  24. 一种信息发送装置,其中,包括:
    组帧模块,设置为生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;
    发送模块,设置为发送所述无线帧。
  25. 如权利要求24所述的装置,其中:
    所述组帧模块生成的无线帧包括的第一指示参数包括偏移值;所述基本服务集标识切换的时刻为第一切换时刻加上偏移值。
  26. 如权利要求25所述的装置,其中:
    所述组帧模块生成的无线帧中还包括目标信标切换参数,所述目标信标切换参数为在 切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻的数目。
  27. 如权利要求26所述的装置,其中:
    所述第一切换时刻根据所述目标信标切换参数确定。
  28. 如权利要求25所述的装置,其中:所述第一切换时刻为携带所述第一指示参数的信标帧对应的目标信标传输时刻。
  29. 如权利要求27所述的装置,其中:所述第一切换时刻根据所述目标信标切换参数确定,包括:所述第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
  30. 如权利要求24所述的装置,其中:所述组帧模块生成的无线帧还包括第二指示参数,所述第二指示参数用于指示第一指示参数是否存在。
  31. 如权利要求24所述的装置,其中:
    所述组帧模块生成的无线帧包括两种或两种以上格式,并且所述两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
  32. 如权利要求24所述的装置,其中:
    所述组帧模块生成的无线帧指示携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
  33. 如权利要求32所述的装置,其中:
    所述有效切换参数包括:目标信标切换参数和/或偏移值。
  34. 如权利要求24至33任意一项所述的装置,其中:
    所述组帧模块生成的无线帧包括信标帧或者单播无线帧或者广播无线帧。
  35. 一种接入点,其中,包括如权利要求24~34中任意一项所述的信息发送装置。
  36. 一种基本服务集标识切换的装置,其中,包括:
    接收模块,设置为接收无线帧,所述无线帧中包括第一指示参数;
    处理模块,设置为根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
  37. 如权利要求36所述的装置,其中:
    所述接收模块接收的无线帧包括的第一指示参数包括偏移值;所述站点在第一切换时刻加上偏移值的时刻进行基本服务集标识切换。
  38. 如权利要求36所述的装置,其中:
    所述接收模块,还设置为接收所述携带有效切换参数的无线帧;所述处理模块,还设置为根据所述有效切换参数确定基本服务集标识切换时刻。
  39. 如权利要求37所述的装置,其中:
    所述接收模块接收的无线帧中还包括目标信标切换参数,所述目标信标切换参数为在切换到新的基本服务集标识之前需要继续保持旧的基本服务集标识的目标信标传输时刻 的数目。
  40. 如权利要求39所述的装置,其中:所述第一切换时刻根据所述目标信标切换参数确定。
  41. 如权利要求37所述的装置,其中:所述第一切换时刻为携带所述第一指示参数的信标帧对应的目标信标传输时刻。
  42. 如权利要求40所述的装置,其中:所述第一切换时刻根据所述目标信标切换参数确定,包括:所述第一切换时刻为携带目标信标切换参数为0的信标帧对应的目标信标传输时刻。
  43. 如权利要求36所述的装置,其中:
    所述接收模块接收的无线帧中还包括第二指示参数,所述第二指示参数设置为指示第一指示参数是否存在。
  44. 如权利要求36所述的装置,其中:
    所述接收模块接收的无线帧包括两种或两种以上格式,并且所述两种或两种以上无线帧中指示的基本服务集标识切换的时刻相同。
  45. 如权利要求36所述的装置,其中:
    所述接收模块接收的无线帧指示携带有效切换参数的无线帧信息包括以下至少之一:帧格式、序列编号、带宽。
  46. 如权利要求45所述的装置,其中:
    所述有效切换参数包括:目标信标切换参数和/或偏移值。
  47. 如权利要求36至46中任意一项所述的装置,其中:
    所述接收模块接收的无线帧包括信标帧或者单播无线帧或者广播无线帧。
  48. [根据细则26改正05.03.2018] 
    一种站点,其中,包括如权利要求36~47中任意一项所述的基本服务集标识切换的装置。
  49. 一种用于基本服务集标识切换的***,其中,包括:
    接入点,包括,
    组帧模块,设置为生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;
    发送模块,设置为发送所述无线帧;
    切换模块,设置为根据所述第一指示参数进行基本服务集标识切换;
    站点,包括,
    接收模块,设置为接收所述无线帧;
    处理模块,设置为根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
  50. 一种用于基本服务集标识切换的方法,包括:
    接入点生成无线帧,所述无线帧中包括第一指示参数;所述第一指示参数用于校正基 本服务集标识切换的时刻或用于指示携带有效切换参数的无线帧信息;
    接入点发送所述无线帧;
    接入点根据所述第一指示参数进行基本服务集标识切换;
    站点接收所述无线帧;
    站点根据所述第一指示参数校正基本服务集标识切换时刻,或者根据所述第一指示参数确定携带有效切换参数的无线帧。
  51. 一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令被执行时实现如权利要求1-11所述的方法。
  52. 一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令被执行时实现如权利要求12-23所述的方法。
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