WO2015127771A1 - 一种接入点、站点、信标帧的发送方法及系统 - Google Patents

一种接入点、站点、信标帧的发送方法及系统 Download PDF

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Publication number
WO2015127771A1
WO2015127771A1 PCT/CN2014/085226 CN2014085226W WO2015127771A1 WO 2015127771 A1 WO2015127771 A1 WO 2015127771A1 CN 2014085226 W CN2014085226 W CN 2014085226W WO 2015127771 A1 WO2015127771 A1 WO 2015127771A1
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WO
WIPO (PCT)
Prior art keywords
beacon
frame
sub
beacon frame
access
Prior art date
Application number
PCT/CN2014/085226
Other languages
English (en)
French (fr)
Inventor
罗俊
巴勃·菲利普
禄·彼得
Original Assignee
华为技术有限公司
宽带移动技术公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司, 宽带移动技术公司 filed Critical 华为技术有限公司
Priority to EP14884056.4A priority Critical patent/EP3104656B1/en
Publication of WO2015127771A1 publication Critical patent/WO2015127771A1/zh
Priority to US15/248,741 priority patent/US10159031B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for transmitting an access point, a station, and a beacon frame.
  • WLAN wireless local area network
  • the Institute of Electrical and Electronics Engineers (IEEE) 802.1 1 n/ac standard will have several adjacent channels (such as a bandwidth of 20 MHz per channel). Combining into a channel with a larger bandwidth (such as 80MHz or 160MHz), and then transmitting the service data through the channel with larger bandwidth, thus multiplying the service data transmission rate of the WLAN system. And with the continuous development of the mobile Internet, more unlicensed spectrum will be used in WLAN systems, such as the Federal Communications Commission (FCC) will release 195MHz 5GHz spectrum for WLAN systems, that is, Future WLAN systems will further enhance support for multiple channels.
  • FCC Federal Communications Commission
  • the station since the station (STA) does not know which subchannel of the plurality of subchannels of the WLAN system is the main channel (the main channel includes the beacon frame required for the STA to access the network), Into the network, the STA needs to scan on multiple subchannels.
  • an access point In order to ensure that the STA can access the network quickly, in the prior art, an access point (AP) needs to be A beacon frame is sent on each available subchannel, so that the STA can quickly acquire the beacon frame by scanning the subchannel, and then obtain information required for accessing the network from the beacon frame to implement network access.
  • the information length of the beacon frame is large (for example, the information length of the beacon frame specified in the IEEE 802.1 1b standard is about 160 bytes), so that there are many In a WLAN system of a channel, if an AP transmits a beacon frame on all available subchannels for scanning access by the STA, it will bring a large network overhead to the WLAN system.
  • the invention provides a method and a system for transmitting an access point, a station, and a beacon frame, which solves the problem that the network overhead is relatively large in order to ensure that the STA accesses the network quickly in the WLAN system with multiple channels.
  • a first aspect of the present invention provides an access point AP, which is applied to a WLAN system of a wireless local area network, where the WLAN system includes N subchannels, and the N subchannels include A first subchannels, and N is greater than or equal to 2.
  • a positive integer, A is a positive integer less than N, and the AP includes:
  • a first sending unit configured to send a beacon indication frame on each of the N subchannels, where the beacon indication frame is used to indicate configuration information of the beacon frame;
  • a second sending unit configured to send the beacon frame on at least one of the first subchannels.
  • the beacon indication frame includes: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier.
  • the sending time is: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier. The sending time.
  • the beacon indication frame further includes: a time interval for transmitting the beacon frame corresponding to a channel identifier of each of the first subchannels that send the beacon frame.
  • the beacon indication frame further includes: event notification information; wherein, when the system information of the WLAN system is not changed, the event notification information is used to indicate that system information of the WLAN system is unchanged; When the system information of the system changes, the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the beacon indication frame further includes: event notification information; the event notification information is used to indicate the changed system information and the remaining time when the changed system information changes.
  • the first subchannel is a main channel.
  • a station STA is provided, which is applied to a WLAN system of a wireless local area network, where the WLAN system includes N subchannels, and the N subchannels include A first subchannels, and N is greater than or equal to 2.
  • An integer, A is a positive integer less than N, and the STA includes:
  • a receiving unit configured to receive, on any one of the N subchannels, a beacon indication frame sent by an access point AP, where the beacon indication frame is used to indicate configuration information of a beacon frame, where a beacon frame is transmitted by the AP on at least one of the first subchannels;
  • An acquiring unit configured to acquire, according to the beacon indication frame obtained by the receiving unit, access information required for accessing the AP;
  • An access unit configured to access the AP according to the access information required by the acquiring unit to access the AP.
  • the beacon indication frame includes: a service set identifier S SID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a pair with the channel identifier The transmission time of the beacon frame should be sent.
  • the acquiring unit when the AP sends the beacon frame on one of the first subchannels, the acquiring unit includes:
  • a first determining module configured to determine a first remaining time according to a sending time of sending the beacon frame corresponding to a channel identifier of the first subchannel that sends the beacon frame; the first remaining time is Transmitting a remaining time of the beacon frame on the first subchannel transmitting the beacon frame;
  • a first startup module configured to start a timer
  • a first receiving module configured to: when the timing of the timer is equal to the first remaining time, receive the beacon frame according to the channel identifier of the first subchannel that sends the beacon frame;
  • the beacon frame includes the access information required to access the AP.
  • the acquiring Unit when the AP sends the beacon frame on two or more of the first subchannels, the acquiring Unit, including:
  • a second determining module configured to determine a first channel identifier, where the first channel identifier is a channel identifier used to receive the first subchannel of the beacon frame;
  • the second determining module is further configured to determine a second remaining time according to a sending time of sending the beacon frame corresponding to the first channel identifier, where the second remaining time is in the a remaining time of transmitting the beacon frame on the first subchannel corresponding to a channel identifier;
  • a second startup module configured to start a timer
  • a second receiving module configured to receive the beacon frame according to the first channel identifier when a timing of the timer is equal to the second remaining time, where the beacon frame includes the Access information required to enter the AP.
  • the second determining module is specifically configured to:
  • the channel identifier corresponding to the sending time is determined as the first channel identifier
  • the acquiring unit includes:
  • a sending module configured to send a probe request frame to the AP according to the beacon indication frame
  • a third receiving module configured to receive a probe response frame sent by the AP, where the probe response frame includes the access information required to access the AP.
  • the receiving unit is further configured to: after the access unit accesses the AP according to the access information required to access the AP, receive the beacon indication frame on the subchannel, where The beacon indication frame further includes: event notification information; and when the event notification information is used to indicate that the system information of the WLAN system has not changed, receiving the beacon frame according to the beacon indication frame.
  • the STA further includes:
  • Activating unit configured to start a timer when the event notification information is used to indicate changed system information and a remaining time when the changed system information changes
  • the receiving unit is further configured to receive a new beacon indication frame on the subchannel when a timing of the timer is equal to a remaining time when the changed system information changes;
  • the acquiring unit is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiving unit;
  • an updating unit configured to update the changed system information according to the new beacon frame obtained by the acquiring unit.
  • the receiving unit is further configured to: after the access unit accesses the AP according to the access information required to access the AP, receive the beacon indication frame on the subchannel;
  • the initiating unit is further configured to: when the beacon indication frame obtained by the receiving unit includes event notification information, start a timer; the event notification information is used to indicate changed system information and the changed system The remaining time when the information changes;
  • the receiving unit is further configured to receive a new beacon indication frame on the subchannel when a timing of the timer is equal to a remaining time when the changed system information changes;
  • the acquiring unit is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiving unit;
  • the updating unit is further configured to update the changed system information according to the new beacon frame obtained by the acquiring unit.
  • the STA further includes:
  • the processing unit is configured to enter a sleep state before the first startup module or the second startup module starts the timer.
  • the processing unit is further configured to enter a sleep state before the startup unit starts the timer.
  • the receiving unit is specifically configured to receive the beacon indication frame on an already accessed subchannel or on any one of the N subchannels.
  • the first subchannel is a main channel.
  • a third aspect of the present invention provides a method for transmitting a beacon frame, which is applied to a WLAN system of a wireless local area network, where the WLAN system includes N subchannels, and the N
  • the subchannel includes A first subchannels, N is a positive integer greater than or equal to 2, and A is a positive integer less than N, and the method includes:
  • the access point AP transmits a beacon indication frame on each of the N subchannels; the beacon indication frame is used to indicate configuration information of the beacon frame;
  • the beacon indication frame includes: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier.
  • the sending time is: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier. The sending time.
  • the beacon indication frame further includes: a time interval for transmitting the beacon frame corresponding to a channel identifier of each of the first subchannels that send the beacon frame.
  • the beacon indication frame further includes: event notification information; wherein, when the system information of the WLAN system is not changed, the event notification information is used to indicate that system information of the WLAN system is unchanged; When the system information of the system changes, the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the beacon indication frame further includes: event notification information; the event notification information is used to indicate the changed system information and the remaining time when the changed system information changes.
  • the first subchannel is a main channel.
  • a fourth aspect of the present invention provides a method for transmitting a beacon frame, which is applied to a WLAN system of a wireless local area network, where the WLAN system includes N subchannels, and the N
  • the subchannel includes A first subchannels, N is a positive integer greater than or equal to 2, and A is a positive integer less than N, and the method includes:
  • the station STA receives, on any one of the N subchannels, a beacon indication frame sent by the access point AP, where the beacon indication frame is used to indicate configuration information of the beacon frame, and the beacon frame Transmitting, by the AP, on at least one of the first subchannels; acquiring, according to the beacon indication frame, access information required for accessing the AP; according to the access information required to access the AP Access to the AP.
  • the beacon indication frame includes: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier.
  • the sending time is: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a sending the beacon frame corresponding to the channel identifier. The sending time.
  • the performing according to the beacon indication obtaining the access information required for accessing the AP by the frame, including: determining, according to a sending time of sending the beacon frame corresponding to a channel identifier of the first subchannel that sends the beacon frame, determining a first remaining Time; the first remaining time is a remaining time of transmitting the beacon frame on the first subchannel that transmits the beacon frame;
  • the beacon frame Receiving, according to the channel identifier of the first subchannel that sends the beacon frame, the beacon frame, when the timing of the timer is equal to the first remaining time; wherein the beacon frame is The access information required for accessing the AP is included in the access information.
  • the The beacon indication frame acquires access information required for accessing the AP, and includes:
  • the first channel identifier is a channel identifier for receiving a first subchannel of the beacon frame
  • the beacon frame Receiving, according to the first channel identifier, the beacon frame, when the timing of the timer is equal to the second remaining time, where the beacon frame includes the required information for accessing the AP Access information.
  • the determining the first channel identifier includes:
  • the obtaining, by the beacon indication frame, access information required for accessing the AP includes:
  • the method further includes:
  • the beacon indication frame further includes: event notification information
  • the beacon frame is received according to the beacon indication frame.
  • the method further includes:
  • the method further includes:
  • the beacon indication frame includes the event notification information, starting a timer; the event notification information is used to indicate the changed system information and the remaining time when the changed system information changes;
  • the method before the starting timer, the method further includes:
  • the receiving the beacon indication frame on the subchannel includes:
  • the beacon indication frame is received on an already accessed subchannel or on any one of the N subchannels.
  • the first subchannel is a main channel.
  • a fifth aspect of the present invention provides a beacon frame transmission system, which is applied to a wireless local area network (WLAN) system, where the WLAN system includes N subchannels, and the N subchannels include A first subchannels, where N is greater than A positive integer equal to 2, A is a positive integer less than N, and the transmitting system of the beacon frame includes: an access point AP, and a station STA;
  • the AP configured to send a beacon indication frame on each of the N subchannels, where the beacon indication frame is used to indicate configuration information of a beacon frame; and at least one of the first Transmitting the beacon frame on a subchannel;
  • the STA configured to receive, on any one of the N subchannels, a beacon indication frame sent by an access point AP, and acquire, according to the beacon indication frame, access information required to access the AP And accessing the AP according to the access information required to access the AP.
  • the method and system for transmitting an access point, a station, and a beacon frame provided by the present invention in a WLAN system with multiple channels, the AP transmits a beacon frame only on at least one first subchannel, and each of the multiple channels The beacon indication frame is sent on the subchannel to indicate the configuration information of the beacon frame, and the network overhead is saved under the premise of ensuring that the STA accesses the network quickly.
  • FIG. 1 is a schematic structural diagram of an AP according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a composition of a STA according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic diagram of another STA according to Embodiment 2 of the present invention
  • FIG. 4 is still another STA provided by Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of a composition of another STA according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic diagram of a composition of another STA according to Embodiment 2 of the present invention.
  • FIG. 7 is a flow chart of a method for transmitting a beacon frame according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic flowchart of a method for transmitting a beacon frame according to Embodiment 4 of the present invention.
  • 9 is a schematic flowchart of a method for sending a beacon frame according to Embodiment 5 of the present invention.
  • 10 is a schematic flowchart of another method for sending a beacon frame according to Embodiment 5 of the present invention;
  • FIG. 1 is a schematic flowchart of still another method for transmitting a beacon frame according to Embodiment 5 of the present invention
  • FIG. 12 is a schematic structural diagram of an AP according to Embodiment 6 of the present invention
  • FIG. 13 is a schematic diagram of a composition of a STA according to Embodiment 7 of the present invention
  • FIG. 14 is a schematic diagram of a beacon frame according to Embodiment 8 of the present invention
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist separately. B these three situations.
  • the character " /" in this article generally indicates that the contextual object is an "or" relationship.
  • Embodiment 1 of the present invention provides an AP, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, N is a positive integer greater than or equal to 2, and A is less than A positive integer of N, as shown in FIG. 1, the AP includes: a first sending unit 1 1 and a second sending unit 12.
  • the first sending unit 1 1 is configured to send a beacon indication frame on each of the N subchannels, where the beacon indication frame is used to indicate configuration information of the beacon frame.
  • the second sending unit 12 is configured to send the beacon frame on at least one of the first subchannels.
  • the first transmission unit 1 of the AP transmits the information length on each of the N subchannels included in the WLAN system.
  • a small beacon indicating frame indicating the configuration information of the beacon frame
  • the second transmitting unit 12 of the AP transmits a beacon frame having a larger information length on the at least one first subchannel.
  • the first sending unit 1 1 of the AP may periodically send a beacon indication frame on each of the N subchannels, and the second sending unit 12 of the AP may also be in each of the at least one first subchannel.
  • the beacon frame is periodically transmitted on the first subchannel, and in order to save the energy of the STA and ensure the fast access of the STA, the first sending unit 11 of the AP sends the beacon indication frame to be smaller than the second transmission of the AP.
  • Unit 12 sends the period of the beacon frame.
  • the following information may be used to indicate the configuration information of the beacon frame in the beacon indication frame, where the specific beacon indication frame includes: a service set identifier of the AP (service set identifier, S SID ), a channel identifier of each of the first subchannels transmitting the beacon frame, and a transmission time of transmitting the beacon frame corresponding to the channel identifier.
  • the specific beacon indication frame includes: a service set identifier of the AP (service set identifier, S SID ), a channel identifier of each of the first subchannels transmitting the beacon frame, and a transmission time of transmitting the beacon frame corresponding to the channel identifier.
  • the first sending unit 1 1 of the AP may further include: in the beacon indication frame sent on the subchannel, And a time interval corresponding to the channel identifier of the first subchannel of the beacon frame for transmitting the beacon frame.
  • the beacon transmitted by the sending unit of the receiving AP is subsequently repeated.
  • the time interval of sending the beacon frame corresponding to the channel identifier of the first subchannel of the transmitted beacon frame is obtained, and the beacon frame is sent.
  • the sleep state is switched to the working state to receive the beacon frame sent by the AP.
  • the first sending unit of the AP 1 1 The event notification information may be carried in the transmitted beacon indication frame.
  • the beacon indication frame further includes: event notification information; wherein, when the system information of the WLAN system is not changed, the event notification The information is used to indicate that the system information of the WLAN system is unchanged; when the system information of the WLAN system is changed, the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • system information of the WLAN system in the embodiment of the present invention may include, but is not limited to, a combination of one or more of the following information: configuration information of the beacon frame, and N subchannels included in the WLAN system. Which of the N subchannels included in the WLAN system are the second subchannels, and the second subchannel is the first subchannel of the N subchannels of the WLAN system. Outer subchannel.
  • the beacon indication frame when the system information of the WLAN system is not changed, the beacon indication frame does not carry event notification information; system information in the WLAN system. And changing, the beacon indication frame further includes: event notification information; the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the first subchannel is a main channel.
  • the STA in the embodiment of the present invention refers to an electronic device with a wireless fidelity (Wi-Fi) function, such as a mobile phone and a terminal.
  • Wi-Fi wireless fidelity
  • the embodiment of the present invention does not specifically describe the S TA. limit.
  • the access point provided by the embodiment of the present invention in a WLAN system with multiple channels, the AP sends a beacon frame only on at least one first subchannel, and transmits a small information length on each subchannel of the multiple channels.
  • the beacon indication frame indicates the configuration information of the beacon frame, and the network overhead is saved under the premise of ensuring that the STA quickly accesses the network.
  • the STA is notified in advance by the event notification information, thereby avoiding the STA continuously tracking the network change, and further saving the energy of the STA.
  • Example 2 Embodiment 2 of the present invention provides a STA, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, N is a positive integer greater than or equal to 2, and A is less than A positive integer of N.
  • the STA may include: a receiving unit 21, an obtaining unit 22, and an access unit 23.
  • the receiving unit 21 is configured to receive, on any one of the N subchannels, a beacon indication frame sent by the access point AP, where the beacon indication frame is used to indicate configuration information of the beacon frame.
  • the beacon frame is transmitted by the AP on at least one of the first subchannels.
  • the receiving unit 21 may receive, on any one of the N subchannels included in the WLAN system, a beacon for indicating the beacon frame configuration information with a small information length, which is sent by the AP, when the STA needs to access the network. Indicates the frame.
  • the obtaining unit 22 is configured to acquire, according to the beacon indication frame obtained by the receiving unit 2, access information required for accessing the AP.
  • the access unit 23 is configured to access the AP according to the access information required by the acquiring unit 22 to access the AP.
  • the beacon indication frame includes: a service set identifier S SID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and a location Transmitting the transmission time of the beacon frame corresponding to the channel identifier.
  • the acquiring unit 22 includes: a first determining module 221, a first starting module 222, and a first receiving module 223.
  • the first determining module 221 is configured to determine, according to a sending time of sending the beacon frame corresponding to a channel identifier of the first subchannel that sends the beacon frame, a first remaining time; The remaining time is the time remaining to transmit the beacon frame on the first subchannel transmitting the beacon frame.
  • the transmission time of the beacon frame is sent on the first subchannel, so the first determining module 221 of the STA Need to determine the time from receiving the beacon indication frame to How much time remains after the AP transmits the beacon frame on the first subchannel, that is, the first remaining time needs to be determined, so that the beacon frame is received at the time when the AP transmits the beacon frame.
  • the first startup module 222 is configured to start a timer.
  • the first receiving module 223 is configured to receive, according to the channel identifier of the first subchannel that sends the beacon frame, when a timing of the timer is equal to the first remaining time, a beacon frame, where the beacon frame includes the access information required to access the AP.
  • the beacon indication frame includes only one channel identifier of the first subchannel that transmits the beacon frame, and the transmitted beacon frame corresponding to the channel identifier.
  • Send time Specifically, after the first startup module 222 starts the timer, when the timer time is equal to the first remaining time, the sleep state may be converted to the working state, and then the first receiving module 223 indicates that the frame is included according to the beacon. Transmitting a channel identifier of the first subchannel of the beacon frame, and receiving a beacon frame that is sent by the AP on the first subchannel and includes access information required to access the AP.
  • the obtaining unit 22 includes: a second determining module 224, a second starting module 225, and a second receiving module 226.
  • the second determining module 224 is configured to determine a first channel identifier, where the first channel identifier is a channel identifier for receiving a first subchannel of the beacon frame.
  • the beacon indication frame sent by the AP on the subchannel includes the channel identifier of the first subchannel of each transmitted beacon frame. And a transmission time of the transmission beacon frame corresponding to the channel identifier.
  • the second determining module 224 needs to determine first. a first channel identifier, the first channel identifier being a channel identifier of a first subchannel for receiving a beacon frame.
  • the second determining module 224 is further configured to determine a second remaining time according to a sending time of the beacon frame corresponding to the first channel identifier, where the second remaining time is Sending on the first subchannel corresponding to the first channel identifier The remaining time of the beacon frame.
  • the transmission time of the beacon frame is sent on the first subchannel, and thus the second determining module 224 determines After receiving the first channel identifier of the first subchannel of the beacon frame, it is also required to determine to send the beacon frame from the moment when the beacon indication frame is received to the AP transmitting the first subchannel corresponding to the first channel identifier. How much time remains in time, that is, the second remaining time needs to be determined to receive the beacon frame at the time when the AP transmits the beacon frame on the first subchannel corresponding to the first channel identifier.
  • the second startup module 225 is configured to start a timer.
  • the second receiving module 226 is configured to: when the timeout period of the timer is equal to the second remaining time, receive the beacon frame according to the first channel identifier; where the beacon frame includes The access information required to access the AP.
  • the sleep state may be converted to the working state, and the second receiving module 226 receives the AP according to the first channel identifier.
  • a beacon frame transmitted on the first subchannel corresponding to the first channel identifier and containing access information required for accessing the AP.
  • the second determining module 224 is specifically configured to determine, according to the beacon indication frame, a channel identifier corresponding to an earliest transmission time of the sending time of sending the beacon frame as Or determining, according to the radio frequency capability of the receiver, the channel identifier of the first subchannel supported by the receiver as the first channel identifier.
  • the acquiring unit 22 includes: a sending module 227 and a third receiving module 228.
  • the sending module 227 is configured to send a probe request frame to the AP according to the beacon indication frame.
  • the sending module 227 can directly according to the beacon.
  • the SSID of the AP included in the indication frame sends a probe request frame to the AP, and the probe request frame is used to obtain access information required for accessing the AP.
  • the third receiving module 228 is configured to receive the probe response frame sent by the AP, where the probe response frame includes the access information required to access the AP.
  • the sending module 227 sends the probe request frame to the AP according to the beacon indication frame
  • the AP may send the probe response frame carrying the access information required by the access itself to the STA according to the received probe request frame.
  • the third receiving module 228 can receive the probe response frame sent by the AP including the access information required to access the AP.
  • the access unit 23 accesses the AP according to the access information required to access the AP,
  • the receiving unit 21 may further need to continue to receive the beacon frame sent by the AP, and the specific receiving unit 21 may be on the accessed subchannel or any of the N subchannels included in the WL AN system.
  • a beacon indication frame sent by the AP is received on one subchannel, and then the beacon frame sent by the AP is received according to the received beacon indication frame.
  • the receiving unit 21 is further configured to perform the After the access unit 23 accesses the AP according to the access information required to access the AP, the beacon indication frame is received on the subchannel, where the beacon indication frame includes: an S of the AP a SID, a channel identifier of a first subchannel of each of the transmitted beacon frames, and a transmission time of the transmitted beacon frame corresponding to the channel identifier, and the beacon indication frame further includes: event notification information; and when the event notification information And when the system information for indicating the WLAN system is not changed, receiving the beacon frame according to the beacon indication frame.
  • the STA further includes: a starting unit 24 and an updating unit 25.
  • the initiating unit 24 is configured to start a timer when the event notification information is used to indicate the changed system information and the remaining time when the changed system information changes.
  • the STA may first determine whether it needs to update the changed system information according to its own needs and the changed system information, and determine the system that needs to change the system. After the information is updated, the startup unit 24 restarts the timer.
  • the receiving unit 21 is further configured to receive a new beacon indication frame on the subchannel when a timing of the timer is equal to a remaining time when the changed system information changes.
  • the acquiring unit 22 is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiving unit 21.
  • the updating unit 25 is configured to update the changed system information according to the new beacon frame obtained by the acquiring unit 22.
  • the sleep state may be converted to the working state, and then the receiving unit 21 is on the accessed subchannel or the N subchannels included in the WLAN system.
  • the acquisition unit 22 acquires a new beacon frame according to the new beacon indication frame, and the last update unit 25 updates the new beacon frame obtained according to the acquisition unit 22.
  • the system information of the change when the timing of the timer is equal to the remaining time when the changed system information changes, the sleep state may be converted to the working state, and then the receiving unit 21 is on the accessed subchannel or the N subchannels included in the WLAN system.
  • a new beacon indication frame is received, and then the acquisition unit 22 acquires a new beacon frame according to the new beacon indication frame, and the last update unit 25 updates the new beacon frame obtained according to the acquisition unit 22.
  • the system information of the change when the timing of the timer is equal to the remaining time when the changed system information changes, the sleep state may be converted to the working state, and then the receiving unit 21 is on the accessed subchannel or the N subchannels included in the WLAN system
  • the receiving unit 2 1 is further configured to: in the access unit 23, access information required to access the AP according to the access After accessing the AP, the beacon indication frame is received on the subchannel.
  • the initiating unit 24 is further configured to: when the beacon indication frame obtained by the receiving unit 2 1 includes event notification information, start a timer; the event notification information is used to indicate changed system information and the The remaining time when the changed system information changes.
  • the receiving unit 21 may first determine whether the received beacon indication frame includes event notification information. If the STA determines that the beacon indication frame does not include the event notification information, the receiving unit 21 directly receiving a beacon frame according to the received beacon indication frame; if the STA determines that the beacon indication frame includes event notification information, The startup unit 24 restarts the timer.
  • the receiving unit 21 is further configured to receive a new beacon indication frame on the subchannel when a timing of the timer is equal to a remaining time when the changed system information changes.
  • the acquiring unit 22 is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiving unit 21.
  • the updating unit 25 is further configured to update the changed system information according to the new beacon frame obtained by the acquiring unit 22.
  • the STA further includes: a processing unit 26.
  • the processing unit 26 is configured to enter a sleep state before the first startup module 222 or the second startup module 225 starts a timer.
  • the processing unit 26 is further configured to enter a sleep state before the startup unit 24 starts the timer.
  • the receiving unit 21 is specifically configured to receive the beacon indication frame on the accessed subchannel or on any one of the N subchannels.
  • the first subchannel is a main channel.
  • the system information of the WLAN system in the embodiment of the present invention may include, but is not limited to, a combination of one or more of the following information: configuration information of the beacon frame, and N subchannels included in the WLAN system. Which of the N subchannels included in the WLAN system are the second subchannels, and the second subchannel is the first subchannel of the N subchannels of the WLAN system. Outer subchannel.
  • the STA in the embodiment of the present invention refers to an electronic device having a Wi-Fi function, such as a mobile phone and a terminal.
  • the embodiment of the present invention does not specifically limit the STA.
  • an AP transmits a beacon frame only on at least one first subchannel, and each sub-letter in multiple channels
  • the beacon indication frame with a small information length is sent to indicate the configuration information of the beacon frame, so that the STA can obtain the access information required for accessing the AP according to the beacon indication frame, and according to the access information required for accessing the AP.
  • Accessing the AP saves network overhead while ensuring that the STA accesses the network quickly.
  • the STA After the STA receives the beacon indication frame, by first entering the sleep state, and when the timer timing is equal to the remaining time required to receive the beacon frame, the STA transitions from the sleep state to the working state to receive the beacon frame. , thus saving the energy of the STA.
  • the STA When the system information of the WLAN system is about to change, the STA is notified by the event notification information, which avoids the STA continuously tracking the network change, and further saves the STA energy.
  • Embodiment 3 of the present invention provides a method for transmitting a beacon frame, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, and N is a positive integer greater than or equal to 2.
  • A is a positive integer less than N.
  • the method may include:
  • the AP transmits a beacon indication frame on each of the N subchannels.
  • the beacon indication frame is used to indicate configuration information of the beacon frame.
  • the AP sends a beacon frame on the at least one first subchannel.
  • the AP transmits a beacon indication frame for indicating configuration information of the beacon frame on each of the N subchannels, and only at least Sending a beacon frame on a first subchannel, where the information length of the beacon indication frame is smaller than the information length of the beacon frame, so that the STA can obtain the access required to access the AP according to the received beacon indication frame.
  • the information is further connected to the AP according to the access information required to access the AP.
  • step 301 and step 302 has no sequential relationship, and may be performed simultaneously in general.
  • the specific execution order of the steps 301 and 302 may be determined according to the requirements of the actual application scenario.
  • the execution sequence of the steps 301 and 302 is not specifically limited in the embodiment of the present invention.
  • the STA described in the embodiment of the present invention refers to a mobile phone and a terminal.
  • the electronic device having the Wi-Fi function is not specifically limited to the STA in the embodiment of the present invention.
  • the first subchannel described in the embodiment of the present invention may be a primary channel.
  • the AP transmits a beacon frame only on at least one first subchannel and transmits a beacon on each of the multiple channels.
  • the indication frame is used to indicate the configuration information of the beacon frame, and the network overhead is saved under the premise of ensuring that the STA accesses the network quickly.
  • Embodiment 4 of the present invention provides a method for transmitting a beacon frame, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, and N is a positive integer greater than or equal to 2.
  • A is a positive integer less than N.
  • the method may include:
  • the STA receives a beacon indication frame sent by the AP on any one of the N subchannels.
  • the beacon indication frame is used to indicate configuration information of the beacon frame, and the beacon frame is sent by the AP on the at least one first subchannel.
  • the STA acquires access information required for accessing the AP according to the beacon indication frame.
  • the STA accesses the AP according to the access information required to access the AP.
  • a beacon indication frame for indicating configuration information of a beacon frame is transmitted on each of the N subchannels, and only Transmitting a beacon frame on at least one first subchannel, where the STA only needs to receive a beacon indication frame for indicating configuration information of the beacon frame sent on any one of the subchannels, and then The access information required to access the ⁇ is obtained according to the received beacon indication frame, and the access information according to the obtained access ⁇ is accessed to achieve the purpose of fast access.
  • the STA in the embodiment of the present invention refers to an electronic device having a Wi-Fi function, such as a mobile phone and a terminal.
  • the embodiment of the present invention does not specifically limit the STA.
  • the first subchannel described in the embodiment of the present invention may be a primary channel.
  • an AP transmits a beacon frame only on at least one first subchannel, and is in a multi-channel Sending a beacon indication frame on each subchannel in the channel to indicate configuration information of the beacon frame, so that the STA can acquire access information required for accessing the AP according to the beacon indication frame, and according to access required for accessing the AP Information accesses the AP, which saves network overhead while ensuring that the STA accesses the network quickly.
  • Embodiment 5 of the present invention provides a method for transmitting a beacon frame, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, and N is a positive integer greater than or equal to 2.
  • A is a positive integer smaller than N.
  • the method may include:
  • the AP transmits a beacon indication frame on each of the N subchannels, and transmits a beacon frame on the at least one first subchannel.
  • the AP in order to save network overhead while ensuring STA fast access to the network, the AP is included in the WLAN system.
  • a beacon indication frame for indicating configuration information of the beacon frame having a smaller information length is transmitted on each of the N subchannels, and a beacon frame having a larger information length is transmitted on the at least one first subchannel.
  • the beacon indication frame is used to indicate the configuration information of the beacon frame, and the following information may be used to indicate the configuration information of the beacon frame in the beacon indication frame, which may specifically include: an S SID of the AP, and each transmitted beacon frame.
  • the channel identifier of the first subchannel and the transmission time of the transmitted beacon frame corresponding to the channel identifier.
  • the AP may periodically send a beacon indication frame on each of the N subchannels, or periodically transmit a beacon frame on each of the at least one first subchannel, and In order to save the energy of the STA and ensure that the STA accesses the network quickly, the AP transmits a beacon indicating that the period of the frame is smaller than the period in which the beacon frame is transmitted.
  • the AP may further include: in the beacon indication frame that is sent, each channel identifier corresponding to the first subchannel that sends the beacon frame. Transmitting a time interval of the beacon frame on the first subchannel, such that when the STA acquires each of the beacon indication frames, the transmitted beacon frame corresponding to the channel identifier of the first subchannel of the transmitted beacon frame After the time interval, after the follow-up In the process of repeatedly receiving the beacon frame sent by the AP, it is not necessary to always be in the listening state, but may be based on the obtained time interval of transmitting the beacon frame corresponding to the channel identifier of the first subchannel of the transmitted beacon frame, and waiting for The sending moment of the beacon frame is further changed from the sleep state to the working state to receive the beacon frame transmitted by the AP.
  • the STA receives a beacon indication frame sent by the AP on any one of the N subchannels.
  • the beacon indication frame for indicating the beacon frame configuration information with a small information length sent by the AP may be received on any one of the N subchannels included in the WLAN system.
  • the STA acquires access information required for accessing the AP according to the beacon indication frame.
  • the STA After the STA receives the beacon indication frame sent by the AP on any one of the N subchannels, the STA can obtain the access information required to access the AP according to the received beacon indication frame.
  • the specific implementation manner in which the STA obtains the access information required to access the AP according to the beacon indication frame includes but is not limited to the following possible implementation manners.
  • the STA when the AP sends a beacon frame on a first subchannel, the STA obtains access information required for accessing the AP according to the beacon indication frame, where The following steps 503 al - step 503 a4 may be included:
  • the STA determines a first remaining time according to a sending time of a sending beacon frame corresponding to a channel identifier of the first subchannel that transmits the beacon frame.
  • the first remaining time is the remaining time of transmitting the beacon frame on the first subchannel of the transmitted beacon frame. Since the beacon indication frame includes a transmission time of the beacon frame transmitted on the first subchannel corresponding to the channel identifier of the first subchannel transmitting the beacon frame, the STA needs to determine to receive the beacon indication from the reception. The time remaining from the time of the frame to the transmission time of the AP transmitting the beacon frame on the first subchannel, that is, the first remaining time needs to be determined, so that the beacon frame is received at the time when the AP transmits the beacon frame.
  • the STA enters a sleep state.
  • step 503 a2 is an optional step, that is, the sending time of the transmitting beacon frame corresponding to the channel identifier of the first subchannel of the transmitting beacon frame by the STA, After determining the first remaining time, step 503 a3 can be directly performed.
  • S TA starts the timer.
  • the STA receives the beacon frame according to the channel identifier of the first subchannel of the transmitted beacon frame.
  • the beacon frame includes access information required for accessing the AP, and when the AP sends the beacon frame on a first subchannel, the beacon indication frame includes only one first subchannel that transmits the beacon frame.
  • the channel identifier, and the transmission time of the transmitted beacon frame corresponding to the channel identifier.
  • the STA may be converted from the sleep state to the working state, and the beacon included in the frame is indicated according to the beacon.
  • the STA acquires the access required to access the AP according to the beacon indication frame.
  • the information may specifically include the following steps 503b l - step 503b5:
  • S TA determines the first channel identifier.
  • the beacon indication frame sent by the AP on the subchannel includes the channel identifier of the first subchannel of each transmitted beacon frame. And sending a beacon frame corresponding to the channel identifier, and after the STA receives the beacon indication frame sent by the AP on any one of the N subchannels, first determining the first channel identifier, where The first channel identifier is a channel identifier for receiving a first subchannel of the beacon frame.
  • determining the first channel identifier may be: the STA identifier that corresponds to the earliest transmission time of the sending time of the beacon frame according to the beacon indication frame. Determined to be the first channel identifier, or In another possible implementation manner of the embodiment of the present invention, determining the first channel identifier may be: the STA determines, according to its own receiver radio frequency capability, that the channel identifier of the first subchannel supported by the STA is the first channel identifier.
  • 503b2 Determine a second remaining time according to a sending time of the transmitted beacon frame corresponding to the first channel identifier.
  • the second remaining time is the remaining time of transmitting the beacon frame on the first subchannel corresponding to the first channel identifier. Since the beacon indication frame includes a transmission time of the beacon frame transmitted on the first subchannel corresponding to the channel identifier of the first subchannel transmitting the beacon frame, the STA is determined to receive the beacon frame. After the first channel identifier of the first subchannel, it is also required to determine how much time remains from the time when the beacon indication frame is received to the time when the AP transmits the beacon frame on the first subchannel corresponding to the first channel identifier. That is, the second remaining time needs to be determined to receive the beacon frame at the time when the AP transmits the beacon frame on the first subchannel corresponding to the first channel identifier.
  • the STA enters a sleep state.
  • the sleep state may be first entered.
  • step 503b3 is an optional step, that is, after the STA determines the second remaining time according to the sending time of the transmitted beacon frame corresponding to the first channel identifier, Step 503b4 is performed.
  • the STA receives the beacon frame according to the first channel identifier.
  • the beacon frame includes access information required for accessing the AP. Specifically, after the STA enters the sleep state and starts the timer, when the timer time is equal to the second remaining time, the STA may be converted from the sleep state to the working state, and according to the first channel identifier, the receiving AP is in the same state. A channel identifier corresponding to the access information required to access the AP sent on the first subchannel corresponding to the channel identifier.
  • the access information required to access the AP is obtained according to the beacon indication frame, which may specifically include the following step 503 cl - step Step 503 c2:
  • the S TA sends a probe request frame to the AP according to the beacon indication frame.
  • the STA may directly send the probe request frame to the AP according to the S SID of the AP included in the beacon indication frame.
  • the probe request frame is used to obtain access information required to access the AP.
  • the S TA receives the probe response frame sent by the AP.
  • the probe response frame includes access information required for accessing the AP.
  • the AP may send a probe response frame carrying the access information required by the access itself to the STA according to the received probe request frame, and then the S TA A probe response frame sent by the AP including access information required to access the AP may be received.
  • the STA accesses the AP according to the access information required to access the AP.
  • the AP When the system information of the WLAN system changes, the AP notifies the S TA by including the changed system information in the beacon frame. Therefore, after the STA accesses the AP according to the access information required to access the AP, To the changed system information, the S TA also needs to continue to receive the beacon frame sent by the AP, and the specific STA may receive the AP on the accessed subchannel or on any one of the N subchannels included in the WLAN system.
  • the transmitted beacon indicates a frame, and then receives a beacon frame transmitted by the AP according to the received beacon indication frame.
  • system information of the WLAN system in the embodiment of the present invention may include, but is not limited to, a combination of one or more of the following information: configuration information of the beacon frame, and N subchannels included in the WLAN system. Which of the N subchannels included in the WLAN system are the second subchannels, and the second subchannel is the first subchannel of the N subchannels of the WLAN system. Outer subchannel.
  • the AP may carry the event notification information in the transmitted beacon indication frame, and in the WLAN system.
  • the event notification information is used to indicate that the system information of the WLAN system has not changed; in the WLAN system
  • the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the specific process of continuing to receive the beacon frame sent by the AP may include the following steps 505al-step 505a2, or include the following steps. 505al, step 505a3 - step 505a5.
  • the STA receives the beacon indication frame on the subchannel.
  • the STA may receive a beacon indication frame sent by the AP on the accessed subchannel or on any one of the N subchannels included in the WLAN system, where the beacon indication frame includes: an SSID of the AP, each The channel identifier of the first subchannel that transmits the beacon frame and the transmission time of the transmitted beacon frame corresponding to the channel identifier, and the beacon indication frame further includes: event notification information.
  • the beacon frame may be received according to the specific role of the event notification information.
  • the following step 505a2 is performed; in another possible implementation, the following step 505a3 - 505a5 is performed.
  • the STA receives the beacon frame according to the beacon indication frame.
  • the STA may receive the beacon frame according to the received beacon indication frame.
  • step 503a - step 503a4 in the embodiment of the present invention
  • step 503b l - step 503b5 in the embodiment of the present invention.
  • the embodiments of the present invention are not described here again.
  • the STA enters a sleep state.
  • the STA may first enter a sleep state.
  • the STA may further change according to the needs of the STA.
  • the system information determines whether it needs to update the changed system information, and then enters the sleep state after determining that it needs to update the changed system information.
  • the STA receives a new beacon indication frame on the subchannel, acquires a new beacon frame according to the new beacon indication frame, and according to the new The beacon frame updates the changed system information.
  • the STA may be converted from the sleep state to the working state, and then on the accessed subchannel or in the N subchannels included in the WLAN system.
  • a new beacon indication frame is received, a new beacon frame is acquired according to the new beacon indication frame, and the changed system information is updated according to the new beacon frame.
  • an embodiment of the present invention provides an example of event notification information.
  • the event notification information uses a binary sequence to indicate the specific role of the event notification information, wherein 3 bits are used to indicate system information of the WLAN system whose system information has not changed or changed (as shown in Table 1, where the binary shown in Table 1
  • the correspondence between the sequence and the system information of the WLAN system that has not changed or changed may be pre-agreed by the AP and the STA, or may be that the AP carries the notification to the STA in the beacon indication frame, and the system is changed by using 5 bits.
  • the event notification information of the configuration of the beacon frame is updated after the time interval. Referring to Table 1, the event notification information is 10010010, wherein the first 3 bits 100 indicate that the AP updates the configuration of the beacon frame, and the last 5 bits indicate the AP update.
  • the configured time of the beacon frame is 18 times after the time interval of transmitting the beacon indication frame, so that when the STA receives the beacon finger containing 10010010 After the frame, they can first enter the sleep state, and then starts the timer, and transmits a beacon equal to 18 indicates that the frame in the timing time of the timer After the time interval, re-enter the working state, and receive a new beacon indication frame, then acquire a new beacon frame according to the new beacon indication frame (update the configured beacon frame), and finally update according to the new beacon frame. Changed system information.
  • the specific implementation method for the STA to receive a new beacon frame according to the received new beacon indication frame may refer to step 303al - step 303a4 in the embodiment of the present invention, or step 303b l - step in the embodiment of the present invention.
  • the detailed description of 303b5 is not repeated here.
  • the AP when the system information of the WLAN system is unchanged, the AP does not carry the event notification information in the beacon indication frame; when the system information of the WLAN system changes, the AP carries the event in the beacon indication frame. Notification information, and the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the specific process of continuing to receive the beacon frame sent by the AP may include the following steps 505b l - 505b4.
  • the STA receives the beacon indication frame on the subchannel.
  • the STA may receive a beacon indication frame sent by the AP on the accessed subchannel or on any one of the N subchannels included in the WLAN system, where the beacon indication frame includes: an SSID of the AP, each The channel identifier of the first subchannel of the transmitted beacon frame and the transmission time of the transmitted beacon frame corresponding to the channel identifier.
  • the STA After the STA receives the beacon indication frame, it may first determine whether the received beacon indication frame includes event notification information, if the STA determines that the beacon indication frame does not include an event. When the information is notified, the STA receives the beacon frame according to the received beacon indication frame. If the STA determines that the beacon indication frame includes the event notification information, the following step 505b2 - 505b4 is performed, where the event notification information is used to indicate The changed system information and the remaining time of the changed system information changes.
  • step 503a - step 503a4 in the embodiment of the present invention
  • step 503b l - step 503b5 in the embodiment of the present invention.
  • the embodiments of the present invention are not described here again.
  • the STA enters a sleep state.
  • the STA may first enter a sleep state.
  • the STA when the STA determines that the event notification information is included in the beacon indication frame, it may first determine, according to the event notification information, whether the changed system information needs to be updated, and after determining that the changed system information needs to be updated, enter Sleep state.
  • event notification information in this implementation manner may refer to an example of event notification information in another implementation manner of the present invention, and the embodiments of the present invention are not described herein again.
  • the STA receives a new beacon indication frame on the subchannel, acquires a new beacon frame according to the new beacon indication frame, and The changed system information is updated according to the new beacon frame.
  • step 503a - step 503a4 in the embodiment of the present invention
  • step 503b l - step in the embodiment of the present invention.
  • the detailed description of 503b5 is not repeated here.
  • the STA in the embodiment of the present invention refers to an electronic device having a Wi-Fi function, such as a mobile phone and a terminal.
  • the embodiment of the present invention does not specifically limit the STA.
  • the first subchannel described in the embodiment of the present invention may be a primary channel.
  • an AP transmits a beacon frame only on at least one first subchannel, and transmits a beacon indication frame having a smaller information length on each of the plurality of channels to indicate configuration information of the beacon frame, so that the STA Obtaining the access information required for accessing the AP according to the beacon indication frame, and accessing the AP according to the access information required for accessing the AP, and saving network overhead on the premise of ensuring that the STA accesses the network quickly.
  • the STA After the STA receives the beacon indication frame, by first entering the sleep state, and when the timer timing is equal to the remaining time required to receive the beacon frame, the STA transitions from the sleep state to the working state to receive the beacon frame. , thus saving the energy of the STA.
  • the STA When the system information of the WLAN system is about to change, the STA is notified by the event notification information, which avoids the STA continuously tracking the network change, and further saves the STA energy.
  • Embodiment 6 of the present invention provides an AP, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, N is a positive integer greater than or equal to 2, and A is less than A positive integer of N, as shown in FIG. 12, the AP includes: a transmitter 61.
  • a transmitter 61 configured to send a beacon indication frame on each of the N subchannels, where the beacon indication frame is used to indicate configuration information of a beacon frame; and in at least one of the first subchannels The beacon frame is transmitted on.
  • the beacon indication frame includes: a service set identifier SSID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and the The transmission time of the beacon frame corresponding to the channel identifier.
  • the beacon indication frame further includes: sending, by the each of the channel identifiers of the first subchannel that sends the beacon frame, the beacon frame time interval.
  • the beacon indication frame further includes: event notification information; wherein, when the system information of the WLAN system is not changed, the event notification information is used to indicate the WLAN system System information has not changed; When the system information of the WLAN system changes, the event notification information is used to indicate the changed system information and the remaining time of the changed system information.
  • the beacon indication frame further includes: event notification information; the event notification information is used to indicate the changed system information and the The remaining time when the changed system information changes.
  • the first subchannel is a main channel.
  • the system information of the WLAN system in the embodiment of the present invention may include, but is not limited to, a combination of one or more of the following information: configuration information of the beacon frame, and N subchannels included in the WLAN system. Which of the N subchannels included in the WLAN system are the second subchannels, and the second subchannel is the first subchannel of the N subchannels of the WLAN system. Outer subchannel.
  • the STA in the embodiment of the present invention refers to an electronic device having a Wi-Fi function, such as a mobile phone and a terminal.
  • the embodiment of the present invention does not specifically limit the STA.
  • the AP transmits a beacon frame only on at least one first subchannel, and transmits a beacon with a small information length on each of the multiple channels. Instructing the frame to indicate the configuration information of the beacon frame, so that the STA obtains the access information required for accessing the AP according to the beacon indication frame, and accesses the AP according to the access information required to access the AP, and ensures that the STA is quickly connected. On the premise of entering the network, network overhead is saved.
  • the STA After the STA receives the beacon indication frame, by first entering the sleep state, and when the timer timing is equal to the remaining time required to receive the beacon frame, the STA transitions from the sleep state to the working state to receive the beacon frame. , thus saving the energy of the STA. And when the system information of the WLAN system is about to change, by the event notification information Before the STA is notified, the STA is prevented from continuously tracking network changes, further saving the energy of the STA.
  • Embodiment 7 of the present invention provides a STA, which is applied to a WLAN system, where the WLAN system includes N subchannels, where the N subchannels include A first subchannels, N is a positive integer greater than or equal to 2, and A is less than A positive integer of N, as shown in FIG. 13, the STA includes: a receiver 71 and a processor 72.
  • the receiver 71 is configured to receive, on any one of the N subchannels, a beacon indication frame sent by the access point AP, where the beacon indication frame is used to indicate configuration information of the beacon frame, where The beacon frame is transmitted by the AP on at least one of the first subchannels.
  • the processor 72 is configured to acquire, according to the beacon indication frame obtained by the receiver 71, access information required for accessing the AP, and access according to the access information required to access the AP.
  • the AP is configured to acquire, according to the beacon indication frame obtained by the receiver 71, access information required for accessing the AP, and access according to the access information required to access the AP.
  • the AP is configured to acquire, according to the beacon indication frame obtained by the receiver 71, access information required for accessing the AP, and access according to the access information required to access the AP.
  • the beacon indication frame further includes: a service set identifier S SID of the AP, a channel identifier of each first subchannel that sends the beacon frame, and Transmitting a transmission time of the beacon frame corresponding to the channel identifier.
  • the processor 72 is specifically configured to: when the AP sends the beacon frame on one of the first subchannels:
  • the first remaining time is when the beacon frame is sent The remaining time of transmitting the beacon frame on the first subchannel;
  • the beacon frame Receiving, according to the channel identifier of the first subchannel that sends the beacon frame, the beacon frame, when the timing of the timer is equal to the first remaining time; wherein the beacon frame is The access information required for accessing the AP is included in the access information.
  • the processor 72 is specifically configured to:
  • the first channel identifier is a channel identifier for receiving a first subchannel of the beacon frame
  • the beacon frame Receiving, according to the first channel identifier, the beacon frame, when the timing of the timer is equal to the second remaining time, where the beacon frame includes the required information for accessing the AP Access information.
  • the processor 72 is further configured to: determine, according to the beacon indication frame, a channel identifier corresponding to an earliest transmission time of the sending time of sending the beacon frame as Or determining, according to the radio frequency capability of the receiver, the channel identifier of the first subchannel supported by the receiver as the first channel identifier.
  • the processor 72 is further configured to: send, according to the beacon indication frame, a probe request frame to the AP;
  • the receiver 71 is further configured to: after the processor 72 accesses the AP according to the access information required to access the AP, Receiving the beacon indication frame on the subchannel; the beacon indication frame further includes: event notification information, and when the event notification information is used to indicate that the system information of the WLAN system is unchanged, according to the The beacon indication frame receives the beacon frame.
  • the processor 72 is further configured to: when the event notification information is used to indicate the changed system information and the remaining time when the changed system information changes, start timing Device.
  • the receiver 71 is further configured to: when the timer has a timing equal to the change When the remaining time of the system information changes, a new beacon indication frame is received on the subchannel.
  • the processor 72 is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiver 71, and update the changed system information according to the new beacon frame.
  • the receiver 71 is further configured to: after the processor 72 accesses the AP according to the access information required to access the AP, in the The beacon indication frame is received on a channel.
  • the processor 72 is further configured to: when the beacon indication frame includes event notification information, start a timer; the event notification information is used to indicate that the changed system information and the changed system information are changed. time.
  • the receiver 71 is further configured to receive a new beacon indication frame on the subchannel when a timing of the timer is equal to a remaining time when the changed system information changes.
  • the processor 72 is further configured to acquire a new beacon frame according to the new beacon indication frame obtained by the receiver 71, and update the changed system information according to the new beacon frame.
  • the processor 72 is further configured to enter a sleep state before the starting timer.
  • the receiver 71 is further configured to receive the beacon indication frame on the accessed subchannel or on any one of the N subchannels. .
  • the first subchannel is the main channel.
  • the system information of the WLAN system in the embodiment of the present invention may include, but is not limited to, a combination of one or more of the following information: configuration information of the beacon frame, and N subchannels included in the WLAN system. Which of the N subchannels included in the WLAN system are the second subchannels, and the second subchannel is the first subchannel of the N subchannels of the WLAN system. Outer subchannel.
  • the STA in the embodiment of the present invention refers to an electronic device having a Wi-Fi function, such as a mobile phone and a terminal. The embodiment of the present invention does not specifically limit the STA.
  • the AP transmits a beacon frame only on at least one first subchannel, and transmits a beacon with a small information length on each of the multiple channels. Instructing the frame to indicate the configuration information of the beacon frame, so that the STA obtains the access information required for accessing the AP according to the beacon indication frame, and accesses the AP according to the access information required to access the AP, and ensures that the STA is quickly connected. On the premise of entering the network, network overhead is saved.
  • the STA After the STA receives the beacon indication frame, by first entering the sleep state, and when the timer timing is equal to the remaining time required to receive the beacon frame, the STA transitions from the sleep state to the working state to receive the beacon frame. , thus saving the energy of the STA.
  • the STA When the system information of the WLAN system is about to change, the STA is notified by the event notification information, which avoids the STA continuously tracking the network change, and further saves the STA energy.
  • Embodiment 8 of the present invention provides a system for transmitting a beacon frame, which is applied to a WLAN system, where the WLAN system includes N subchannels, and the N subchannels include A first subchannels, and N is greater than or equal to 2.
  • An integer, A is a positive integer smaller than N.
  • the transmission system of the beacon frame includes AP81 and STA82.
  • the AP 81 is configured to send a beacon indication frame on each of the N subchannels, where the beacon indication frame is used to indicate configuration information of a beacon frame, and at least one of the first The beacon frame is transmitted on a subchannel.
  • the STA 82 is configured to receive, on any one of the N subchannels, a beacon indication frame sent by the access point AP81, and acquire, according to the beacon indication frame, access information required to access the AP81. According to the access information required to access the AP81 Access the AP81.
  • the AP transmits a beacon frame only on at least one first subchannel and transmits the information length on each subchannel of the multiple channels.
  • the smaller beacon indication frame is used to indicate the configuration information of the beacon frame, so that the STA obtains the access information required for accessing the AP according to the beacon indication frame, and accesses the AP according to the access information required to access the AP.
  • the network overhead is saved under the premise of ensuring that the STA accesses the network quickly.
  • the STA After the STA receives the beacon indication frame, by first entering the sleep state, and when the timer timing is equal to the remaining time required to receive the beacon frame, the STA transitions from the sleep state to the working state to receive the beacon frame. , thus saving the energy of the STA.
  • the STA When the system information of the WLAN system is about to change, the STA is notified by the event notification information, which avoids the STA continuously tracking the network change, and further saves the STA energy.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, It can be electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as the unit may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium.
  • the technical solution of the present invention may be embodied in the form of a software product in the form of a software product, or a part of the technical solution, which is stored in a storage medium.
  • a number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing 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, which can store program codes. .

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Abstract

本发明公开了一种接入点、站点、信标帧的发送方法及系统,涉及通信领域,解决了在具有多信道的WLAN系统中,为了确保STA快速接入网络而造成的网络开销比较大的问题。具体方案为:第一发送单元在N个子信道中的每个子信道上发送信标指示帧;所述信标指示帧用于指示信标帧的配置信息;第二发送单元在至少一个第一子信道上发送所述信标帧。本发明用于信标帧的发送过程中。

Description

一种接入点、 站点、 信标帧的发送方法及系统 本申请要求于 2014 年 02 月 27 日提交中国专利局、 申请号为 201410070321 .9、 发明名称为 "一种接入点、 站点、 信标帧的发送 方法及系统" 的中国专利申请的优先权, 其全部内容通过引用结合 在本申请中。
技术领域
本发明涉及通信领域, 尤其涉及一种接入点、 站点、 信标帧的 发送方法及系统。
背景技术
随着移动互联网的发展和智能终端的普及, 网络中的数据量急 剧增加, 为了高效的处理这些数据, 具备高速率、 低成本等优点的 无线局 i或网 ( wireless local area network , WLAN ) 系统成为了主流 的移动宽带接入技术之一。
为了进一步提升 WLAN系统的业务数据传输速率, 电气和电子 工程师协会 ( Institute of Electrical and Electronics Engineers , IEEE ) 802. 1 1 n/ac标准将若干个相邻的信道(如每个信道的带宽为 20MHz ) 合并成一个具有更大带宽 (如 80MHz或者 160MHz ) 的信道, 然后 通过这个具有更大带宽的信道进行业务数据的传输, 这样便成倍的 提升了 WLAN系统的业务数据传输速率。 且随着移动互联网的不断 发展, 会有更多的非授权频谱被运用于 WLAN系统中, 如联邦通信 委员会( Federal Communications Commission , FCC )将释放 195MHz 的 5GHz频谱用于 WLAN系统, 也就是说, 未来 WLAN系统对多信 道的支持能力还会进一步提升。 在具有多信道的 WLAN系统中, 由 于站点 ( Station , STA ) 不知道 WLAN 系统的多个子信道中哪个子 信道为主信道 (主信道中包含 STA 接入网络所需的信标帧), 为了 接入网络, STA需要在多个子信道上进行扫描。 为了确保 STA能够 快速接入网络, 在现有技术中, 接入点 ( Access Point , AP ) 需要在 每个可用的子信道上发送信标帧, 以供 STA通过扫描子信道快速的 获取到信标帧, 进而从信标帧中获得接入网络所需的信息以实现网 络的接入。
现有技术中至少存在如下问题: 在现有技术中信标帧的信息长 度很大 (例如, IEEE 802. 1 1b标准中规定的信标帧的信息长度约为 160字节 ), 这样在具有多信道的 WLAN系统中, 若 AP在所有可用 的子信道上均发送信标帧以供 STA进行扫描接入,则会给 WLAN系 统带来很大的网络开销。
发明内容
本发明提供的一种接入点、 站点、 信标帧的发送方法及系统, 解决了在具有多信道的 WLAN系统中,为了确保 STA快速接入网络 而造成的网络开销比较大的问题。
为达到上述目的, 本发明采用如下技术方案:
本发明的第一方面, 提供一种接入点 AP , 应用于无线局域网 WLAN 系统, 所述 WLAN 系统包括 N个子信道, 所述 N个子信道 中包含 A个第一子信道, N为大于等于 2的正整数, A为小于 N的 正整数, 所述 AP包括:
第一发送单元, 用于在所述 N个子信道中的每个子信道上发送 信标指示帧, 所述信标指示帧用于指示信标帧的配置信息;
第二发送单元, 用于在至少一个所述第一子信道上发送所述信 标帧。
结合第一方面, 在一种可能的实现方式中,
所述信标指示帧中包括: 所述 AP的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
结合第一方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述信标指示帧中还包括: 与每个所述发送所述信标帧的所述 第一子信道的信道标识对应的发送所述信标帧的时间间隔。 结合第一方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述信标指示帧中还包括: 事件通知信息; 其中,在所述 WLAN 系统的系统信息未改变时, 所述事件通知信息用于指示所述 WLAN 系统的系统信息未改变; 在所述 WLAN系统的系统信息改变时, 所 述事件通知信息用于指示改变的系统信息及所述改变的系统信息发 生改变的剩余时间。
结合第一方面和上述可能的实现方式, 在另一种可能的实现方 式中,
在所述 WLAN系统的系统信息改变时, 所述信标指示帧中还包 括: 事件通知信息; 所述事件通知信息用于指示改变的系统信息及 所述改变的系统信息发生改变的剩余时间。
结合第一方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述第一子信道为主信道。
本发明的第二方面, 提供一种站点 STA , 应用于无线局域网 WLAN 系统, 所述 WLAN 系统包括 N个子信道, 所述 N个子信道 中包含 A个第一子信道, N为大于等于 2的正整数, A为小于 N的 正整数, 所述 STA包括:
接收单元, 用于在所述 N个子信道中的任一个子信道上接收接 入点 AP 发送的信标指示帧; 其中, 所述信标指示帧用于指示信标 帧的配置信息, 所述信标帧由所述 AP 在至少一个所述第一子信道 上发送;
获取单元, 用于根据所述接收单元得到的所述信标指示帧获取 接入所述 AP所需的接入信息;
接入单元, 用于根据所述获取单元得到的所述接入所述 AP 所 需的接入信息接入所述 AP。
结合第二方面, 在一种可能的实现方式中,
所述信标指示帧中包括: 所述 AP的服务集标识 S SID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 当所述 AP 在一个所述第一子信道上发送所述信标帧时, 所 述获取单元, 包括:
第一确定模块, 用于根据与发送所述信标帧的所述第一子信道 的信道标识对应的发送所述信标帧的发送时间, 确定第一剩余时间; 所述第一剩余时间为在发送所述信标帧的所述第一子信道上发送所 述信标帧的剩余时间;
第一启动模块, 用于启动定时器;
第一接收模块, 用于当所述定时器的计时时间等于所述第一剩 余时间时, 根据所述发送所述信标帧的所述第一子信道的信道标识 接收所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP 所需 的接入信息。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 当所述 AP 在两个或两个以上所述第一子信道上发送所述信 标帧时, 所述获取单元, 包括:
第二确定模块, 用于确定第一信道标识; 所述第一信道标识为 用于接收所述信标帧的第一子信道的信道标识;
所述第二确定模块, 还用于根据与所述第一信道标识对应的发 送所述信标帧的发送时间, 确定第二剩余时间; 其中, 所述第二剩 余时间为在与所述第一信道标识对应的所述第一子信道上发送所述 信标帧的剩余时间;
第二启动模块, 用于启动定时器;
第二接收模块, 用于当所述定时器的计时时间等于所述第二剩 余时间时, 根据所述第一信道标识接收所述信标帧; 其中, 所述信 标帧中包含所述接入所述 AP所需的接入信息。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述第二确定模块, 具体用于:
根据所述信标指示帧, 将发送所述信标帧的发送时间中最早的 发送时间对应的信道标识确定为所述第一信道标识;
或者, 根据自身的接收机射频能力确定自身支持的第一子信道 的信道标识为所述第一信道标识。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述获取单元, 包括:
发送模块, 用于根据所述信标指示帧, 向所述 AP 发送探测请 求帧;
第三接收模块, 用于接收所述 AP 发送的探测响应帧; 其中, 所述探测响应帧中包含所述接入所述 AP所需的接入信息。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述接收单元, 还用于在所述接入单元根据所述接入所述 AP 所需的接入信息接入所述 AP 之后, 在所述子信道上接收所述信标 指示帧, 所述信标指示帧中还包括: 事件通知信息; 并当所述事件 通知信息用于指示所述 WLAN系统的系统信息未改变时, 根据所述 信标指示帧接收所述信标帧。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述 STA还包括:
启动单元, 用于当所述事件通知信息用于指示改变的系统信息 及所述改变的系统信息发生改变的剩余时间时, 启动定时器;
所述接收单元, 还用于当所述定时器的计时时间等于所述改变 的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标 指示帧;
所述获取单元, 还用于根据所述接收单元得到的所述新的信标 指示帧获取新的信标帧;
更新单元, 用于根据所述获取单元得到的所述新的信标帧更新 所述改变的系统信息。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述接收单元, 还用于在所述接入单元根据所述接入所述 AP 所需的接入信息接入所述 AP 之后, 在所述子信道上接收所述信标 指示帧;
所述启动单元, 还用于当所述接收单元得到的所述信标指示帧 中包括事件通知信息时, 启动定时器; 所述事件通知信息用于指示 改变的系统信息及所述改变的系统信息发生改变的剩余时间;
所述接收单元, 还用于当所述定时器的计时时间等于所述改变 的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标 指示帧;
所述获取单元, 还用于根据所述接收单元得到的所述新的信标 指示帧获取新的信标帧;
所述更新单元, 还用于根据所述获取单元得到的所述新的信标 帧更新所述改变的系统信息。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述 STA还包括:
处理单元, 用于在所述第一启动模块或第二启动模块启动定时 器之前, 进入休眠状态。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述处理单元, 还用于在所述启动单元启动定时器之前, 进入 休眠状态。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述接收单元, 具体用于在已接入的子信道上或者在所述 N个 子信道中的任意一个子信道上接收所述信标指示帧。
结合第二方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述第一子信道为主信道。
本发明的第三方面, 提供一种信标帧的发送方法, 应用于无线 局域网 WLAN 系统, 所述 WLAN系统包括 N个子信道, 所述 N个 子信道中包含 A个第一子信道, N为大于等于 2 的正整数, A为小 于 N的正整数, 所述方法包括:
接入点 AP在所述 N个子信道中的每个子信道上发送信标指示 帧; 所述信标指示帧用于指示信标帧的配置信息;
在至少一个所述第一子信道上发送所述信标帧。
结合第三方面, 在一种可能的实现方式中,
所述信标指示帧中包括: 所述 AP的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
结合第三方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述信标指示帧中还包括: 与每个所述发送所述信标帧的所述 第一子信道的信道标识对应的发送所述信标帧的时间间隔。
结合第三方面和上述可能的实现方式, 在另一种可能的实现方 式中,
所述信标指示帧中还包括: 事件通知信息; 其中,在所述 WLAN 系统的系统信息未改变时, 所述事件通知信息用于指示所述 WLAN 系统的系统信息未改变; 在所述 WLAN系统的系统信息改变时, 所 述事件通知信息用于指示改变的系统信息及所述改变的系统信息发 生改变的剩余时间。
结合第三方面和上述可能的实现方式, 在另一种可能的实现方 式中,
在所述 WLAN系统的系统信息改变时, 所述信标指示帧中还包 括: 事件通知信息; 所述事件通知信息用于指示改变的系统信息及 所述改变的系统信息发生改变的剩余时间。
结合第三方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述第一子信道为主信道。
本发明的第四方面, 提供一种信标帧的发送方法, 应用于无线 局域网 WLAN 系统, 所述 WLAN系统包括 N个子信道, 所述 N个 子信道中包含 A个第一子信道, N为大于等于 2 的正整数, A为小 于 N的正整数, 所述方法包括:
站点 STA 在所述 N 个子信道中的任一个子信道上接收接入点 AP发送的信标指示帧; 其中, 所述信标指示帧用于指示信标帧的配 置信息, 所述信标帧由所述 AP在至少一个所述第一子信道上发送; 根据所述信标指示帧获取接入所述 AP所需的接入信息; 根据所述接入所述 AP所需的接入信息接入所述 AP。
结合第四方面, 在一种可能的实现方式中,
所述信标指示帧中包括: 所述 AP的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 当所述 AP 在一个所述第一子信道上发送所述信标帧时, 所 述根据所述信标指示帧获取接入所述 AP所需的接入信息, 包括: 根据与发送所述信标帧的所述第一子信道的信道标识对应的发 送所述信标帧的发送时间, 确定第一剩余时间; 所述第一剩余时间 为在发送所述信标帧的所述第一子信道上发送所述信标帧的剩余时 间;
启动定时器;
当所述定时器的计时时间等于所述第一剩余时间时, 根据所述 发送所述信标帧的所述第一子信道的信道标识接收所述信标帧; 其 中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 当所述 AP 在两个或两个以上所述第一子信道上发送所述信 标帧时, 所述根据所述信标指示帧获取接入所述 AP 所需的接入信 息, 包括:
确定第一信道标识; 所述第一信道标识为用于接收所述信标帧 的第一子信道的信道标识;
根据与所述第一信道标识对应的发送所述信标帧的发送时间, 确定第二剩余时间; 其中, 所述第二剩余时间为在与所述第一信道 标识对应的所述第一子信道上发送所述信标帧的剩余时间;
启动定时器;
当所述定时器的计时时间等于所述第二剩余时间时, 根据所述 第一信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入 所述 AP所需的接入信息。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述确定第一信道标识, 包括:
根据所述信标指示帧, 将发送所述信标帧的发送时间中最早的 发送时间对应的信道标识确定为所述第一信道标识;
或者, 根据自身的接收机射频能力确定自身支持的第一子信道 的信道标识为所述第一信道标识。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述根据所述信标指示帧获取接入所述 AP所需的接入信息, 包括:
根据所述信标指示帧, 向所述 AP发送探测请求帧;
接收所述 AP 发送的探测响应帧; 其中, 所述探测响应帧中包 含所述接入所述 AP所需的接入信息。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 在所述根据所述接入所述 AP所需的接入信息接入所述 AP之 后, 还包括:
在所述子信道上接收所述信标指示帧; 所述信标指示帧中还包 括: 事件通知信息;
当所述事件通知信息用于指示所述 WLAN 系统的系统信息未 改变时, 根据所述信标指示帧接收所述信标帧。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 还包括:
当所述事件通知信息用于指示改变的系统信息及所述改变的系 统信息发生改变的剩余时间时, 启动定时器; 当所述定时器的计时时间等于所述改变的系统信息发生改变的 剩余时间时, 在所述子信道上接收新的信标指示帧;
根据所述新的信标指示帧获取新的信标帧, 并根据所述新的信 标帧更新所述改变的系统信息。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 在所述根据所述接入所述 AP所需的接入信息接入所述 AP之 后, 还包括:
在所述子信道上接收所述信标指示帧;
当所述信标指示帧中包括事件通知信息时, 启动定时器; 所述 事件通知信息用于指示改变的系统信息及所述改变的系统信息发生 改变的剩余时间;
当所述定时器的计时时间等于所述改变的系统信息发生改变的 剩余时间时, 在所述子信道上接收新的信标指示帧;
根据所述新的信标指示帧获取新的信标帧, 并根据所述新的信 标帧更新所述改变的系统信息。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 在所述启动定时器之前, 还包括:
进入休眠状态。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述在所述子信道上接收所述信标指示帧 , 包括:
在已接入的子信道上或者在所述 N个子信道中的任意一个子信 道上接收所述信标指示帧。
结合第四方面和上述可能的实现方式, 在另一种可能的实现方 式中, 所述第一子信道为主信道。
本发明的第五方面, 提供一种信标帧的发送系统, 应用于无线 局域网 WLAN 系统, 所述 WLAN系统包括 N个子信道, 所述 N个 子信道中包含 A个第一子信道, N为大于等于 2 的正整数, A为小 于 N的正整数, 所述信标帧的发送系统包括: 接入点 AP , 以及站点 STA ; 其中, 所述 AP , 用于在所述 N 个子信道中的每个子信道上发 送信标指示帧, 所述信标指示帧用于指示信标帧的配置信息; 并在 至少一个所述第一子信道上发送所述信标帧;
所述 STA , 用于在所述 N个子信道中的任一个子信道上接收接 入点 AP发送的信标指示帧; 根据所述信标指示帧获取接入所述 AP 所需的接入信息; 根据所述接入所述 AP 所需的接入信息接入所述 AP。
本发明提供的接入点、 站点、 信标帧的发送方法及系统, 在具 备多信道的 WLAN 系统中, AP 仅在至少一个第一子信道上发送信 标帧, 并在多信道中的每个子信道上发送信标指示帧来指示信标帧 的配置信息, 在确保 STA快速接入网络的前提下, 节省了网络开销。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可 以根据这些附图获得其他的附图。
图 1 为本发明实施例 1提供的一种 AP的组成示意图;
图 2为本发明实施例 2提供的一种 STA的组成示意图; 图 3为本发明实施例 2提供的另一种 STA的组成示意图; 图 4为本发明实施例 2提供的又一种 STA的组成示意图; 图 5为本发明实施例 2提供的再一种 STA的组成示意图; 图 6为本发明实施例 2提供的再一种 STA的组成示意图;
7为本发明实施例 3提供的一种信标帧的发送方法流程示意 图 8为本发明实施例 4提供的一种信标帧的发送方法流程示意
9为本发明实施例 5提供的一种信标帧的发送方法流程示意 图; 图 10为本发明实施例 5提供的另一种信标帧的发送方法流程示 意图;
图 1 1为本发明实施例 5提供的又一种信标帧的发送方法流程示 意图;
图 12为本发明实施例 6提供的一种 AP的组成示意图; 图 13为本发明实施例 7提供的一种 STA的组成示意图; 图 14为本发明实施例 8提供的一种信标帧的发送系统的组成示 意图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
另外, 本文中术语 "系统" 和 "网络" 在本文中常被可互换使 用。 本文中术语 "和 /或", 仅仅是一种描述关联对象的关联关系, 表示可以存在三种关系, 例如, A和 /或 B , 可以表示: 单独存在 A , 同时存在 A和 B , 单独存在 B这三种情况。 另外, 本文中字符 " /" , 一般表示前后关联对象是一种 "或" 的关系。
实施例 1
本发明实施例 1提供一种 AP ,应用于 WLAN系统,所述 WLAN 系统包括 N个子信道, 所述 N个子信道中包含 A个第一子信道, N 为大于等于 2的正整数, A为小于 N的正整数, 如图 1 所示, 所述 AP 包括: 第一发送单元 1 1 , 第二发送单元 12。
所述第一发送单元 1 1 ,用于在所述 N个子信道中的每个子信道 上发送信标指示帧, 所述信标指示帧用于指示信标帧的配置信息。
所述第二发送单元 12 , 用于在至少一个所述第一子信道上发送 所述信标帧。
其中, 在具备 N个子信道(其中 N个子信道中包括 A个第一子 信道) 的 WLAN系统中, 为了在确保 S TA快速接入网络的前提下, 节省网络开销, AP的第一发送单元 1 1在 WLAN系统包括的 N个子 信道中的每个子信道上发送信息长度较小的用于指示信标帧的配置 信息的信标指示帧, 并且, AP 的第二发送单元 12在至少一个第一 子信道上发送信息长度较大的信标帧。
其中, AP的第一发送单元 1 1可以在 N个子信道中的每个子信 道上周期性的发送信标指示帧, AP 的第二发送单元 12也可以在至 少一个第一子信道中的每个第一子信道上周期性的发送信标帧, 且 为了节省 STA的能量以及确保 S TA快速的接入网络, AP 的第一发 送单元 1 1发送信标指示帧的周期小于 AP的第二发送单元 1 2发送信 标帧的周期。
在本发明实施例中, 进一步的, 信标指示帧中可以用 以下信息 指示信标帧的配置信息, 具体的所述信标指示帧中包括: 所述 AP 的服务集标识 ( service set identifier , S SID )、 每个发送所述信标帧 的所述第一子信道的信道标识以及与所述信道标识对应的发送所述 信标帧的发送时间。
在本发明实施例中,进一步的, 为了进一步的节省 STA的能量, AP 的第一发送单元 1 1 在子信道上发送的所述信标指示帧中还可以 包括: 与每个所述发送所述信标帧的所述第一子信道的信道标识对 应的发送所述信标帧的时间间隔。 这样, 当 STA获取到信标指示帧 中的与每个发送信标帧的第一子信道的信道标识对应的发送信标帧 的时间间隔之后, 在后续重复接收 AP 的发送单元发送的信标帧的 过程中, 不用一直处于侦听状态, 而是可以根据获取到的每个与发 送信标帧的第一子信道的信道标识对应的发送信标帧的时间间隔, 等到信标帧的发送时刻再从休眠状态转换为工作状态去接收 AP 发 送的信标帧。
由于当 WLAN系统的系统信息改变时, AP的第二发送单元 1 2 会将改变后的系统信息包含在信标帧中通知 S TA , 因此为了避免 S TA连续跟踪网络变化, 浪费 STA的能量, AP 的第一发送单元 1 1 可以在发送的信标指示帧中携带事件通知信息。 在本发明实施例中 的一种可能的实现方式中, 进一步的, 所述信标指示帧中还包括: 事件通知信息; 其中, 在所述 WLAN系统的系统信息未改变时, 所 述事件通知信息用于指示所述 WLAN系统的系统信息未改变; 在所 述 WLAN系统的系统信息改变时, 所述事件通知信息用于指示改变 的系统信息及所述改变的系统信息发生改变的剩余时间。
需要说明的是, 本发明实施例中所述的 WLAN系统的系统信息 可以包括但不限于以下信息中的一种或多种的组合: 信标帧的配置 信息、 WLAN系统中包含的 N个子信道中有哪些子信道为第一子信 道、在 WLAN系统中包含的 N个子信道中有哪些子信道为第二子信 道, 其中第二子信道为 WLAN系统的 N个子信道中除第一子信道之 外的子信道。
在本发明实施例中的另一种可能的实现方式中, 进一步的, 在 所述 WLAN系统的系统信息未改变时, 信标指示帧中不携带事件通 知信息; 在所述 WLAN系统的系统信息改变时, 所述信标指示帧中 还包括: 事件通知信息; 所述事件通知信息用于指示改变的系统信 息及所述改变的系统信息发生改变的剩余时间。
在本发明实施例中, 进一步的, 所述第一子信道为主信道。 需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有无线保真 ( Wireless Fidelity , Wi-Fi ) 功能的电子设备, 本发 明实施例在此对 S TA不做具体限制。
本发明实施例提供的接入点, 在具备多信道的 WLAN系统中, AP仅在至少一个第一子信道上发送信标帧, 并在多信道中的每个子 信道上发送信息长度较小的信标指示帧来指示信标帧的配置信息, 在确保 S TA快速接入网络的前提下, 节省了网络开销。
并且, 在 WLAN系统的系统信息即将发生变化时, 通过在事件 通知信息提前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节 省了 STA的能量。
实施例 2 本发明实施例 2提供一种 STA ,应用于 WLAN系统,所述 WLAN 系统包括 N个子信道, 所述 N个子信道中包含 A个第一子信道, N 为大于等于 2的正整数, A为小于 N的正整数, 如图 2所示, 所述 STA可以包括: 接收单元 21、 获取单元 22、 接入单元 23。
所述接收单元 21 ,用于在所述 N个子信道中的任一个子信道上 接收接入点 AP 发送的信标指示帧; 其中, 所述信标指示帧用于指 示信标帧的配置信息, 所述信标帧由所述 AP 在至少一个所述第一 子信道上发送。
其中, 在 STA需要接入网络时, 接收单元 2 1可以在 WLAN系 统包含的 N个子信道中的任意一个子信道上接收 AP发送的信息长 度较小的用于指示信标帧配置信息的信标指示帧。
所述获取单元 22 , 用于根据所述接收单元 2 1 得到的所述信标 指示帧获取接入所述 AP所需的接入信息。
所述接入单元 23 , 用于根据所述获取单元 22 得到的所述接入 所述 AP所需的接入信息接入所述 AP。
在本发明实施例中, 进一步的, 所述信标指示帧中包括: 所述 AP 的服务集标识 S SID、 每个发送所述信标帧的所述第一子信道的 信道标识以及与所述信道标识对应的发送所述信标帧的发送时间。
在本发明实施例中的一种可能的实现方式中, 进一步的, 如图 3所示, 当所述 AP在一个所述第一子信道上发送所述信标帧时, 所 述获取单元 22 , 包括: 第一确定模块 221、 第一启动模块 222、 第 一接收模块 223。
所述第一确定模块 221 , 用于根据与发送所述信标帧的所述第 一子信道的信道标识对应的发送所述信标帧的发送时间, 确定第一 剩余时间; 所述第一剩余时间为在发送所述信标帧的所述第一子信 道上发送所述信标帧的剩余时间。
其中, 因为信标指示帧中包括的是与发送信标帧的第一子信道 的信道标识对应的, 在该第一子信道上发送信标帧的发送时间, 因 此 STA的第一确定模块 221需要确定从接收到信标指示帧的时刻到 AP在该第一子信道上发送信标帧的发送时间还剩余多少时间, 即需 要确定第一剩余时间, 以便在 AP发送信标帧的时刻接收信标帧。
所述第一启动模块 222 , 用于启动定时器。
所述第一接收模块 223 , 用于当所述定时器的计时时间等于所 述第一剩余时间时, 根据所述发送所述信标帧的所述第一子信道的 信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
其中, 当 AP 在一个第一子信道上发送信标帧时, 信标指示帧 中仅包括一个发送信标帧的第一子信道的信道标识, 以及与该信道 标识对应的发送信标帧的发送时间。 具体的, 在的第一启动模块 222 启动定时器之后, 当定时器的计时时间等于第一剩余时间时, 可以 由休眠状态转换为工作状态, 然后第一接收模块 223 根据信标指示 帧中包含的发送信标帧的第一子信道的信道标识, 接收 AP 在该第 一子信道上发送的包含接入 AP所需的接入信息的信标帧。
在本发明实施例中的另一种可能的实现方式中, 进一步的, 如 图 4 所示, 当所述 AP 在两个或两个以上所述第一子信道上发送所 述信标帧时, 所述获取单元 22 , 包括: 第二确定模块 224、 第二启 动模块 225、 第二接收模块 226。
所述第二确定模块 224 , 用于确定第一信道标识; 所述第一信 道标识为用于接收所述信标帧的第一子信道的信道标识。
其中, 当 AP 在两个或两个以上第一子信道上发送信标帧时, AP 在子信道上发送的信标指示帧中便包括每个发送信标帧的第一 子信道的信道标识以及与信道标识对应的发送信标帧的发送时间, 此时在接收单元 21在 N个子信道中的任意一个子信道上接收到 AP 发送的信标指示帧之后, 首先第二确定模块 224 需要确定第一信道 标识, 该第一信道标识为用于接收信标帧的第一子信道的信道标识。
所述第二确定模块 224 , 还用于根据与所述第一信道标识对应 的发送所述信标帧的发送时间, 确定第二剩余时间; 其中, 所述第 二剩余时间为在与所述第一信道标识对应的所述第一子信道上发送 所述信标帧的剩余时间。
其中, 因为信标指示帧中包括的是与发送信标帧的第一子信道 的信道标识对应的, 在该第一子信道上发送信标帧的发送时间, 因 此在第二确定模块 224 确定用于接收信标帧的第一子信道的第一信 道标识之后, 还需要确定从接收到信标指示帧的时刻到 AP 在第一 信道标识对应的第一子信道上发送信标帧的发送时间还剩余多少时 间, 即需要确定第二剩余时间, 以便在 AP 在第一信道标识对应的 第一子信道上发送信标帧的时刻接收信标帧。
所述第二启动模块 225 , 用于启动定时器。
所述第二接收模块 226 , 用于当所述定时器的计时时间等于所 述第二剩余时间时, 根据所述第一信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
其中, 在第二启动模块 225启动定时器之后, 当定时器的计时 时间等于第二剩余时间时, 可以由休眠状态转换为工作状态, 并且 第二接收模块 226根据第一信道标识, 接收 AP 在与该第一信道标 识对应的第一子信道上发送的包含接入 AP 所需的接入信息的信标 帧。
在本发明实施例中, 进一步的, 所述第二确定模块 224 , 具体 用于根据所述信标指示帧, 将发送所述信标帧的发送时间中最早的 发送时间对应的信道标识确定为所述第一信道标识; 或者, 根据自 身的接收机射频能力确定自身支持的第一子信道的信道标识为所述 第一信道标识。
在本发明实施例中的又一种可能的实现方式中, 进一步的, 如 图 5 所示, 所述获取单元 22 , 包括: 发送模块 227、 第三接收模块 228。
所述发送模块 227 , 用于根据所述信标指示帧, 向所述 AP发送 探测请求帧。
其中, 在接收单元 21 在 N个子信道中的任意一个子信道上接 收到 AP 发送的信标指示帧之后, 发送模块 227 可以直接根据信标 指示帧中包含的 AP的 SSID向该 AP发送探测请求帧, 该探测请求 帧用于获取接入该 AP所需的接入信息。
第三接收模块 228 ,用于接收所述 AP发送的探测响应帧;其中, 所述探测响应帧中包含所述接入所述 AP所需的接入信息。
其中, 在发送模块 227根据信标指示帧向 AP发送探测请求帧 之后, AP 可以根据接收到的探测请求帧向该 STA 发送携带有接入 自身所需的接入信息的探测响应帧, 此时第三接收模块 228 便可以 接收 AP发送的包含接入该 AP所需的接入信息的探测响应帧。
由于当 WLAN 系统的系统信息改变时, AP会将改变后的系统 信息包含在信标帧中通知 STA , 因此当接入单元 23根据接入 AP所 需的接入信息接入该 AP 之后, 为了能够获取到发生改变的系统信 息, 接收单元 21还需要继续接收 AP发送的信标帧, 具体的接收单 元 21 可以在已接入的子信道上或者在 WL AN 系统包含的 N个子信 道中的任意一个子信道上接收 AP 发送的信标指示帧, 然后根据接 收到的信标指示帧接收 AP发送的信标帧。
在本发明实施例中为了避免 STA连续跟踪网络变化, 浪费 STA 的能量, 在本发明实施例中的一种可能的实现方式中, 进一步的, 所述接收单元 21 , 还用于在所述接入单元 23根据所述接入所述 AP 所需的接入信息接入所述 AP 之后, 在所述子信道上接收所述信标 指示帧, 所述信标指示帧中包括: AP 的 S SID、 每个发送信标帧的 第一子信道的信道标识以及与信道标识对应的发送信标帧的发送时 间, 且信标指示帧中还包括: 事件通知信息; 并当所述事件通知信 息用于指示所述 WLAN系统的系统信息未改变时, 根据所述信标指 示帧接收所述信标帧。
在本发明实施例中, 进一步的, 如图 6所示, 所述 STA还包括: 启动单元 24、 更新单元 25。
所述启动单元 24 , 用于当所述事件通知信息用于指示改变的系 统信息及所述改变的系统信息发生改变的剩余时间时, 启动定时器。
进一步可选的, 在判断得到事件通知信息用于指示改变的系统 信息及该改变的系统信息发生改变的剩余时间时, STA 还可以先根 据自身的需求以及改变的系统信息确定自身是否需要对该改变的系 统信息进行更新, 并在确定自身需要对该改变的系统信息进行更新 之后, 启动单元 24再启动定时器。
所述接收单元 21 , 还用于当所述定时器的计时时间等于所述改 变的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信 标指示帧。
所述获取单元 22 , 还用于根据所述接收单元 21 得到的所述新 的信标指示帧获取新的信标帧。
所述更新单元 25 , 用于根据所述获取单元 22 得到的所述新的 信标帧更新所述改变的系统信息。
其中, 在定时器的计时时间等于改变的系统信息发生改变的剩 余时间时, 可以由休眠状态转换为工作状态, 然后接收单元 21在已 接入的子信道上或者在 WLAN系统包含的 N个子信道中的任意一个 子信道上, 接收新的信标指示帧, 然后获取单元 22根据新的信标指 示帧获取新的信标帧, 最后更新单元 25根据获取单元 22得到的新 的信标帧更新该改变的系统信息。
在本发明实施例中的另一种可能的实现方式中, 进一步的, 所 述接收单元 2 1 , 还用于在所述接入单元 23根据所述接入所述 AP所 需的接入信息接入所述 AP 之后, 在所述子信道上接收所述信标指 示帧。
所述启动单元 24 , 还用于当所述接收单元 2 1 得到的所述信标 指示帧中包括事件通知信息时, 启动定时器; 所述事件通知信息用 于指示改变的系统信息及所述改变的系统信息发生改变的剩余时 间。
其中, 在接收单元 2 1接收到信标指示帧之后, 可以先判断接收 到的信标指示帧中是否包括事件通知信息, 若 STA确定信标指示帧 中未包括事件通知信息时, 则接收单元 21直接根据接收到的信标指 示帧接收信标帧; 若 STA确定信标指示帧中包括事件通知信息, 则 启动单元 24再启动定时器。
所述接收单元 21 , 还用于当所述定时器的计时时间等于所述改 变的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信 标指示帧。
所述获取单元 22 , 还用于根据所述接收单元 21 得到的所述新 的信标指示帧获取新的信标帧。
所述更新单元 25 , 还用于根据所述获取单元 22 得到的所述新 的信标帧更新所述改变的系统信息。
在本发明实施例中, 进一步的, 为了节省能量, 所述 STA还包 括: 处理单元 26。
所述处理单元 26 , 用于在所述第一启动模块 222或第二启动模 块 225启动定时器之前, 进入休眠状态。
在本发明实施例中, 进一步的, 所述处理单元 26 , 还用于在所 述启动单元 24启动定时器之前, 进入休眠状态。
在本发明实施例中, 进一步的, 所述接收单元 21 , 具体用于在 已接入的子信道上或者在所述 N个子信道中的任意一个子信道上接 收所述信标指示帧。
在本发明实施例中, 进一步的, 所述第一子信道为主信道。 需要说明的是, 本发明实施例中所述的 WLAN系统的系统信息 可以包括但不限于以下信息中的一种或多种的组合: 信标帧的配置 信息、 WLAN系统中包含的 N个子信道中有哪些子信道为第一子信 道、在 WLAN系统中包含的 N个子信道中有哪些子信道为第二子信 道, 其中第二子信道为 WLAN系统的 N个子信道中除第一子信道之 外的子信道。
需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。
本发明实施例提供的站点, 在具备多信道的 WLAN系统中, AP 仅在至少一个第一子信道上发送信标帧, 并在多信道中的每个子信 道上发送信息长度较小的信标指示帧来指示信标帧的配置信息, 这 样 STA可以根据信标指示帧获取接入 AP所需的接入信息, 并根据 接入 AP所需的接入信息接入该 AP , 在确保 STA快速接入网络的前 提下, 节省了网络开销。
并且, 在 STA接收到信标指示帧之后, 通过先进入休眠状态, 并在定时器的计时时间等于接收信标帧所需的剩余时间时, 再从休 眠状态转换为工作状态去接收信标帧, 从而节省了 STA的能量。 且 在 WLAN系统的系统信息即将发生变化时, 通过在事件通知信息提 前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节省了 STA的 能量。
实施例 3
本发明实施例 3提供一种信标帧的发送方法, 应用于 WLAN系 统, 该 WLAN 系统包括 N个子信道, 该 N个子信道中包含 A个第 一子信道, N为大于等于 2 的正整数, A为小于 N的正整数, 如图 7所示, 该方法可以包括:
301、 AP在 N个子信道中的每个子信道上发送信标指示帧。 其中, 信标指示帧用于指示信标帧的配置信息。
302、 AP在至少一个第一子信道上发送信标帧。
具体的, 在具备多信道 ( 包括 N个子信道) 的 WLAN系统中, AP 在该 N 个子信道中的每个子信道上发送用于指示信标帧的配置 信息的信标指示帧, 并仅在至少一个第一子信道上发送信标帧, 其 中, 信标指示帧的信息长度小于信标帧的信息长度, 以便 STA可以 根据接收到的信标指示帧, 获取接入该 AP 所需的接入信息, 进而 根据接入 AP所需的接入信息接入该 AP。
需要说明的是, 在本发明实施例中, 步骤 301 和步骤 302的执 行顺序没有先后关系, 一般情况下也可以是同时执行。 步骤 301 和 步骤 302 具体的执行顺序可以根据实际应用场景的需求确定, 本发 明实施例在此对步骤 301和步骤 302的执行顺序不做具体限制。
需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。 且本发明实施例中所述的第一子信道可以是主信道。
本发明 实施例提供的信标帧的发送方法, 在具备多信道的 WLAN系统中, AP仅在至少一个第一子信道上发送信标帧, 并在多 信道中的每个子信道上发送信标指示帧来指示信标帧的配置信息, 在确保 STA快速接入网络的前提下, 节省了网络开销。
实施例 4
本发明实施例 4提供一种信标帧的发送方法, 应用于 WLAN系 统, 该 WLAN 系统包括 N个子信道, 该 N个子信道中包含 A个第 一子信道, N为大于等于 2 的正整数, A为小于 N的正整数, 如图 8所示, 该方法可以包括:
401、 STA在 N个子信道中的任一个子信道上接收 AP发送的信 标指示帧。
其中, 信标指示帧用于指示信标帧的配置信息, 且信标帧由 AP 在至少一个第一子信道上发送。
402、 STA根据信标指示帧获取接入 AP所需的接入信息。
403、 STA根据接入 AP所需的接入信息接入 AP。
其中, 具体的, 在具备多信道( 包括 N个子信道) 的 WLAN系 统中,ΑΡ在该 N个子信道中的每个子信道上发送用于指示信标帧的 配置信息的信标指示帧, 并仅在至少一个第一子信道上发送信标帧, 此时 STA只需在该 Ν个子信道中的任意一个子信道上接收 ΑΡ发送 的用于指示信标帧的配置信息的信标指示帧, 然后便可以根据接收 到的信标指示帧获取接入该 ΑΡ 所需的接入信息, 并根据获取到的 接入 ΑΡ所需的接入信息接入该 ΑΡ , 实现快速接入的目的。
需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。 且本发明实施例中所述的第一子信道可以是主信道。
本发明 实施例提供的信标帧的发送方法, 在具备多信道的 WLAN系统中, AP仅在至少一个第一子信道上发送信标帧, 并在多 信道中的每个子信道上发送信标指示帧来指示信标帧的配置信息, 这样 STA可以根据信标指示帧获取接入 AP所需的接入信息, 并根 据接入 AP所需的接入信息接入该 AP , 在确保 STA快速接入网络的 前提下, 节省了网络开销。 实施例 5
本发明实施例 5提供一种信标帧的发送方法, 应用于 WLAN系 统, 该 WLAN 系统包括 N个子信道, 该 N个子信道中包含 A个第 一子信道, N为大于等于 2 的正整数, A为小于 N的正整数, 如图 9所示, 该方法可以包括:
50 1、 AP在 N个子信道中的每个子信道上发送信标指示帧, 并 在至少一个第一子信道上发送信标帧。
具体的, 在具备 N个子信道(其中 N个子信道中包括 A个第一 子信道)的 WLAN系统中,为了在确保 S TA快速接入网络的前提下, 节省网络开销, AP在 WLAN 系统包括的 N个子信道中的每个子信 道上发送信息长度较小的用于指示信标帧的配置信息的信标指示 帧, 并在至少一个第一子信道上发送信息长度较大的信标帧。 其中, 信标指示帧用于指示信标帧的配置信息, 且信标指示帧中可以用以 下信息指示信标帧的配置信息, 具体的可以包括: AP 的 S SID、 每 个发送信标帧的第一子信道的信道标识以及与信道标识对应的发送 信标帧的发送时间。
其中, AP 可以在 N 个子信道中的每个子信道上周期性的发送 信标指示帧, 也可以在至少一个第一子信道中的每个第一子信道上 周期性的发送信标帧, 且为了节省 STA的能量以及确保 STA快速的 接入网络, AP发送信标指示帧的周期小于发送信标帧的周期。
在本发明实施例中, 进一步可选的, 为了进一步的节省 STA的 能量, AP在发送的信标指示帧中还可以包括: 每个与发送信标帧的 第一子信道的信道标识对应的, 在该第一子信道上发送信标帧的时 间间隔, 这样, 当 STA获取到信标指示帧中的每个与发送信标帧的 第一子信道的信道标识对应的发送信标帧的时间间隔之后, 在后续 重复接收 AP 发送的信标帧的过程中, 不用一直处于侦听状态, 而 是可以根据获取到的与发送信标帧的第一子信道的信道标识对应的 发送信标帧的时间间隔, 等到信标帧的发送时刻再从休眠状态转换 为工作状态去接收 AP发送的信标帧。
502、 STA在 N个子信道中的任一个子信道上接收 AP发送的信 标指示帧。
其中, 在 STA 需要接入网络时, 可以在 WLAN 系统包含的 N 个子信道中的任意一个子信道上接收 AP 发送的信息长度较小的用 于指示信标帧配置信息的信标指示帧。
503、 STA根据信标指示帧获取接入 AP所需的接入信息。
其中, 在 STA在 N个子信道中的任意一个子信道上接收到 AP 发送的信标指示帧之后, STA 可以根据接收到的信标指示帧获取接 入 AP所需的接入信息。 在本发明实施例中 STA根据信标指示帧获 取接入 AP 所需的接入信息具体的实现方式包括但不限于以下可能 的实现方式。
其中, 在本发明实施例的一种可能的实现方式中, 当 AP 在一 个第一子信道上发送信标帧时, STA 根据信标指示帧获取接入 AP 所需的接入信息, 具体的可以包括以下步骤 503 al -步骤 503 a4 :
503al、 STA根据与发送信标帧的第一子信道的信道标识对应的 发送信标帧的发送时间, 确定第一剩余时间。
其中, 第一剩余时间为在发送信标帧的第一子信道上发送信标 帧的剩余时间。 因为信标指示帧中包括的是与发送信标帧的第一子 信道的信道标识对应的, 在该第一子信道上发送信标帧的发送时间, 因此 STA需要确定从接收到信标指示帧的时刻到 AP在该第一子信 道上发送信标帧的发送时间还剩余多少时间, 即需要确定第一剩余 时间, 以便在 AP发送信标帧的时刻接收信标帧。
503a2、 STA进入休眠状态。
其中, 在 STA根据与发送信标帧的第一子信道的信道标识对应 的发送信标帧的发送时间, 确定第一剩余时间之后, 为了节省能量, 可以先进入休眠状态。
需要说明的是, 在本发明实施例中, 步骤 503 a2 为可选步骤, 也就是说, 在 STA根据与发送信标帧的第一子信道的信道标识对应 的发送信标帧的发送时间, 确定第一剩余时间之后, 可以直接执行 步骤 503 a3。
503 a3、 S TA启动定时器。
503 a4、 当定时器的计时时间等于第一剩余时间时, STA根据发 送信标帧的第一子信道的信道标识接收信标帧。
其中, 信标帧中包含接入 AP所需的接入信息, 且当 AP在一个 第一子信道上发送信标帧时, 信标指示帧中仅包括一个发送信标帧 的第一子信道的信道标识, 以及与该信道标识对应的发送信标帧的 发送时间。 具体的, 在 S TA进入休眠状态并启动定时器之后, 当定 时器的计时时间等于第一剩余时间时, STA 可以由休眠状态转换为 工作状态, 并根据信标指示帧中包含的发送信标帧的第一子信道的 信道标识, 接收 AP在该第一子信道上发送的包含接入 AP所需的接 入信息的信标帧。
在本发明实施例的另一种可能的实现方式中, 当 AP 在两个或 两个以上第一子信道上发送信标帧时, STA 根据信标指示帧获取接 入 AP所需的接入信息,具体的可以包括以下步骤 503b l -步骤 503b5 :
503b l、 S TA确定第一信道标识。
其中, 当 AP 在两个或两个以上第一子信道上发送信标帧时, AP 在子信道上发送的信标指示帧中便包括每个发送信标帧的第一 子信道的信道标识以及与信道标识对应的发送信标帧的发送时间, 此时在 S TA在 N个子信道中的任意一个子信道上接收到 AP发送的 信标指示帧之后, 首先需要确定第一信道标识, 该第一信道标识为 用于接收信标帧的第一子信道的信道标识。
其中, 在本发明实施例的一种可能的实现方式中, 确定第一信 道标识具体的可以是: STA 根据信标指示帧, 将发送信标帧的发送 时间中最早的发送时间对应的信道标识确定为第一信道标识, 或者 在本发明实施例的另一种可能的实现方式中, 确定第一信道标识具 体的可以是: STA 根据自身的接收机射频能力确定自身支持的第一 子信道的信道标识为第一信道标识。
503b2、 根据与第一信道标识对应的发送信标帧的发送时间, 确 定第二剩余时间。
其中, 第二剩余时间为在与第一信道标识对应的第一子信道上 发送信标帧的剩余时间。 因为信标指示帧中包括的是与发送信标帧 的第一子信道的信道标识对应的, 在该第一子信道上发送信标帧的 发送时间, 因此 STA在确定用于接收信标帧的第一子信道的第一信 道标识之后, 还需要确定从接收到信标指示帧的时刻到 AP 在第一 信道标识对应的第一子信道上发送信标帧的发送时间还剩余多少时 间, 即需要确定第二剩余时间, 以便在 AP 在第一信道标识对应的 第一子信道上发送信标帧的时刻接收信标帧。
503b3、 STA进入休眠状态。
其中, 在 STA根据与第一信道标识对应的发送信标帧的发送时 间, 确定第二剩余时间之后, 为了节省能量, 可以先进入休眠状态。
需要说明的是, 在本发明实施例中, 步骤 503b3 为可选步骤, 也就是说, 在 STA根据与第一信道标识对应的发送信标帧的发送时 间, 确定第二剩余时间之后, 可以直接执行步骤 503b4。
503b4、 STA启动定时器。
503b5、 当定时器的计时时间等于第二剩余时间时, STA根据第 一信道标识接收信标帧。
其中, 信标帧中包含接入 AP所需的接入信息。 具体的, 在 STA 进入休眠状态并启动定时器之后, 当定时器的计时时间等于第二剩 余时间时, STA 可以由休眠状态转换为工作状态, 并根据第一信道 标识, 接收 AP 在与该第一信道标识对应的第一子信道上发送的包 含接入 AP所需的接入信息的信标帧。
在本发明实施例的又一种可能的实现方式中, 根据信标指示帧 获取接入 AP 所需的接入信息, 具体的可以包括以下步骤 503 c l -步 骤 503 c2 :
503 c l、 S TA根据信标指示帧, 向 AP发送探测请求帧。
其中, 在 STA在 N个子信道中的任意一个子信道上接收到 AP 发送的信标指示帧之后, STA可以直接根据信标指示帧中包含的 AP 的 S SID 向该 AP 发送探测请求帧, 该探测请求帧用于获取接入该 AP所需的接入信息。
503 c2、 S TA接收 AP发送的探测响应帧。
其中,探测响应帧中包含接入所述 AP所需的接入信息。在 S TA 根据信标指示帧向 AP发送探测请求帧之后, AP可以根据接收到的 探测请求帧向该 S T A发送携带有接入自身所需的接入信息的探测响 应帧, 此时 S TA便可以接收 AP发送的包含接入该 AP 所需的接入 信息的探测响应帧。
504、 S TA根据接入 AP所需的接入信息接入 AP。
由于当 WLAN 系统的系统信息改变时, AP会将改变后的系统 信息包含在信标帧中通知 S TA , 因此当 STA根据接入 AP所需的接 入信息接入该 AP之后, 为了能够获取到发生改变的系统信息, S TA 还需要继续接收 AP发送的信标帧, 具体的 STA 可以在已接入的子 信道上或者在 WLAN系统包含的 N个子信道中的任意一个子信道上 接收 AP发送的信标指示帧, 然后根据接收到的信标指示帧接收 AP 发送的信标帧。 需要说明的是, 本发明实施例中所述的 WLAN系统 的系统信息可以包括但不限于以下信息中的一种或多种的组合: 信 标帧的配置信息、 WLAN系统中包含的 N个子信道中有哪些子信道 为第一子信道、在 WLAN系统中包含的 N个子信道中有哪些子信道 为第二子信道, 其中第二子信道为 WLAN系统的 N个子信道中除第 一子信道之外的子信道。
在本发明实施例中为了避免 S TA连续跟踪网络变化, 浪费 S TA 的能量, 在一种可能的实现方式中, AP可以在发送的信标指示帧中 携带事件通知信息, 且在 WLAN系统的系统信息未改变时, 该事件 通知信息用于指示 WLAN系统的系统信息未改变;在 WLAN系统的 系统信息改变时, 该事件通知信息用于指示改变的系统信息及该改 变的系统信息发生改变的剩余时间。 其中, 如图 10 所示, 当 STA 根据接入 AP所需的接入信息接入该 AP之后, 继续接收 AP发送的 信标帧的具体过程可以包括以下步骤 505al -步骤 505a2 , 或者包括 以下步骤 505al、 步骤 505a3-步骤 505a5。
505al、 STA在子信道上接收信标指示帧。
其中, STA可以在已接入的子信道上或者在 WLAN系统包含的 N个子信道中的任意一个子信道上接收 AP发送的信标指示帧,该信 标指示帧中包括: AP 的 SSID、 每个发送信标帧的第一子信道的信 道标识以及与信道标识对应的发送信标帧的发送时间, 且该信标指 示帧中还包括: 事件通知信息。
在 STA接收到包含有事件通知信息的信标指示帧之后, 可以根 据事件通知信息的具体作用接收信标帧。 其中, 在一种可能的实现 方式中, 执行以下步骤 505a2 ; 在另一种可能的实现方式中, 执行以 下步骤 505a3-步骤 505a5。
505a2、 当事件通知信息用于指示 WLAN 系统的系统信息未改 变时, STA根据信标指示帧接收信标帧。
其中, 在 STA接收到包含有事件通知信息的信标指示帧之后, 当事件通知信息用于指示 WLAN系统的系统信息未改变时, STA可 以根据接收到的信标指示帧接收信标帧。
需要说明的是, STA根据接收到的信标指示帧接收信标帧的具 体实现方法可以参考本发明实施例中步骤 503al -步骤 503a4 , 或者 本发明实施例中步骤 503b l -步骤 503b5 的具体描述, 本发明实施例 在此不再——赘述。
505a3、 当事件通知信息用于指示改变的系统信息及该改变的系 统信息发生改变的剩余时间时, STA进入休眠状态。
其中, 可选的, 为了节省能量, 当 STA判断得到事件通知信息 用于指示改变的系统信息及该改变的系统信息发生改变的剩余时间 时, 可以先进入休眠状态。 在本发明实施例中, 进一步可选的, 在 STA判断得到事件通知 信息用于指示改变的系统信息及该改变的系统信息发生改变的剩余 时间时, STA 还可以先根据自身的需求以及改变的系统信息确定自 身是否需要对该改变的系统信息进行更新, 并在确定自身需要对该 改变的系统信息进行更新之后, 再进入休眠状态。
505a4、 STA启动定时器。
505a5、 当定时器的计时时间等于改变的系统信息发生改变的剩 余时间时, STA 在子信道上接收新的信标指示帧, 根据新的信标指 示帧获取新的信标帧, 并根据新的信标帧更新该改变的系统信息。
其中, 在定时器的计时时间等于改变的系统信息发生改变的剩 余时间时, STA 可以由休眠状态转换为工作状态, 然后在已接入的 子信道上或者在 WLAN系统包含的 N个子信道中的任意一个子信道 上, 接收新的信标指示帧, 根据新的信标指示帧获取新的信标帧, 并根据新的信标帧更新该改变的系统信息。
为了便于本领域技术人员的理解, 本发明实施例提供一种事件 通知信息的示例。 例如事件通知信息中采用二进制序列表示该事件 通知信息的具体作用, 其中采用 3个比特表示 WLAN系统的系统信 息未改变或改变的系统信息 (如表 1 所示, 其中, 表 1 所示的二进 制序列与 WLAN系统的系统信息未改变或改变的系统信息的对应关 系可以是 AP和 STA预先约定的, 也可以是 AP携带在信标指示帧 中通知给 STA 的), 采用 5 比特表示改变的系统信息发生改变的剩 余时间, 当 AP需要在 18个发送信标指示帧的时间间隔之后更新信 标帧的配置时, AP可以在信标指示帧中携带用于表示在 18 个发送 信标指示帧的时间间隔之后更新信标帧的配置的事件通知信息, 结 合表 1, 可知该事件通知信息为 10010010, 其中前 3个比特 100表 示 AP会更新信标帧的配置, 后 5个比特表示 AP更新信标帧的配置 的时间为 18 个发送信标指示帧的时间间隔之后, 这样当 STA接收 到包含有 10010010的信标指示帧之后, 便可以先进入休眠状态, 然 后启动定时器, 并在定时器的计时时间等于 18个发送信标指示帧的 时间间隔之后, 重新进入工作状态, 并接收新的信标指示帧, 然后 根据新的信标指示帧获取新的信标帧 (更新配置后的信标帧 ), 最后 根据新的信标帧更新改变的系统信息。
表 1
Figure imgf000031_0001
需要说明的是, STA根据接收到的新的信标指示帧接收新的信 标帧的具体实现方法可以参考本发明实施例中步骤 303al -步骤 303a4 , 或者本发明实施例中步骤 303b l -步骤 303b5的具体描述, 本 发明实施例在此不再——赘述。
在另一种可能的实现方式中, 在 WLAN系统的系统信息未改变 时, AP 不在信标指示帧中携带事件通知信息; 在 WLAN 系统的系 统信息改变时, AP在信标指示帧中携带事件通知信息, 且该事件通 知信息用于指示改变的系统信息及该改变的系统信息发生改变的剩 余时间。 其中, 如图 1 1 所示, 当 STA根据接入 AP所需的接入信息 接入该 AP之后, 继续接收 AP发送的信标帧的具体过程可以包括以 下步骤 505b l -步骤 505b4。
505b l、 STA在子信道上接收信标指示帧。
其中, STA可以在已接入的子信道上或者在 WLAN系统包含的 N个子信道中的任意一个子信道上接收 AP发送的信标指示帧,该信 标指示帧中包括: AP 的 SSID、 每个发送信标帧的第一子信道的信 道标识以及与信道标识对应的发送信标帧的发送时间。
在 STA接收到信标指示帧之后, 可以先判断接收到的信标指示 帧中是否包括事件通知信息, 若 STA确定信标指示帧中未包括事件 通知信息时, 则 STA根据接收到的信标指示帧接收信标帧; 若 STA 确定信标指示帧中包括事件通知信息, 则执行以下步骤 505b2-步骤 505b4 , 其中, 该事件通知信息用于指示改变的系统信息及该改变的 系统信息发生改变的剩余时间。
需要说明的是, STA根据接收到的信标指示帧接收信标帧的具 体实现方法可以参考本发明实施例中步骤 503al -步骤 503a4 , 或者 本发明实施例中步骤 503b l -步骤 503b5 的具体描述, 本发明实施例 在此不再——赘述。
505b2、 当信标指示帧中包括事件通知信息时, STA进入休眠状 态。
其中, 可选的, 为了节省能量, 当 STA确定信标指示帧中包括 事件通知信息时, 可以先进入休眠状态。
可选的, 当 STA确定信标指示帧中包括事件通知信息时, 可以 先根据事件通知信息确定是否需要对改变的系统信息进行更新, 并 在确定需要对该改变的系统信息进行更新之后, 进入休眠状态。
需要说明的是, 本实现方式中事件通知信息的示例可以参考本 发明的另一种实现方式中事件通知信息的示例, 本发明实施例在此 不再——赘述。
505b3、 STA启动定时器。
505 b 4、当定时器的计时时间等于改变的系统信息发生改变的剩 余时间时, STA 在子信道上接收新的信标指示帧, 根据新的信标指 示帧获取新的信标帧, 并根据新的信标帧更新该改变的系统信息。
需要说明的是, STA根据接收到的新的信标指示帧接收新的信 标帧的具体实现方法可以参考本发明实施例中步骤 503al -步骤 503a4 , 或者本发明实施例中步骤 503b l -步骤 503b5的具体描述, 本 发明实施例在此不再——赘述。
需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。 且本发明实施例中所述的第一子信道可以是主信道。 本发明 实施例提供的信标帧的发送方法, 在具备多信道的
WLAN系统中, AP仅在至少一个第一子信道上发送信标帧, 并在多 信道中的每个子信道上发送信息长度较小的信标指示帧来指示信标 帧的配置信息, 以便 STA根据信标指示帧获取接入 AP所需的接入 信息, 并根据接入 AP所需的接入信息接入该 AP , 在确保 STA快速 接入网络的前提下, 节省了网络开销。
并且, 在 STA接收到信标指示帧之后, 通过先进入休眠状态, 并在定时器的计时时间等于接收信标帧所需的剩余时间时, 再从休 眠状态转换为工作状态去接收信标帧, 从而节省了 STA的能量。 且 在 WLAN系统的系统信息即将发生变化时, 通过在事件通知信息提 前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节省了 STA的 能量。
实施例 6
本发明实施例 6提供一种 AP ,应用于 WLAN系统,所述 WLAN 系统包括 N个子信道, 所述 N个子信道中包含 A个第一子信道, N 为大于等于 2的正整数, A为小于 N的正整数, 如图 12所示, 所述 AP 包括: 发送器 61。
发送器 61 ,用于在所述 N个子信道中的每个子信道上发送信标 指示帧, 所述信标指示帧用于指示信标帧的配置信息; 并在至少一 个所述第一子信道上发送所述信标帧。
在本发明实施例中, 进一步的, 所述信标指示帧中包括: 所述 AP 的服务集标识 SSID、 每个发送所述信标帧的所述第一子信道的 信道标识以及与所述信道标识对应的发送所述信标帧的发送时间。
在本发明实施例中, 进一步的, 所述信标指示帧中还包括: 与 每个所述发送所述信标帧的所述第一子信道的信道标识对应的发送 所述信标帧的时间间隔。
在本发明实施例中, 进一步的, 所述信标指示帧中还包括: 事 件通知信息; 其中, 在所述 WLAN系统的系统信息未改变时, 所述 事件通知信息用于指示所述 WLAN系统的系统信息未改变; 在所述 WLAN 系统的系统信息改变时, 所述事件通知信息用于指示改变的 系统信息及所述改变的系统信息发生改变的剩余时间。
在本发明实施例中, 进一步的, 在所述 WLAN系统的系统信息 改变时, 所述信标指示帧中还包括: 事件通知信息; 所述事件通知 信息用于指示改变的系统信息及所述改变的系统信息发生改变的剩 余时间。
在本发明实施例中, 进一步的, 所述第一子信道为主信道。 需要说明的是, 本发明实施例中所述的 WLAN系统的系统信息 可以包括但不限于以下信息中的一种或多种的组合: 信标帧的配置 信息、 WLAN系统中包含的 N个子信道中有哪些子信道为第一子信 道、在 WLAN系统中包含的 N个子信道中有哪些子信道为第二子信 道, 其中第二子信道为 WLAN系统的 N个子信道中除第一子信道之 外的子信道。
需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。
需要说明的是, 本发明实施例提供的 AP 中功能模块的具体描 述可以参考方法实施例及装置实施例中对应内容的具体描述, 本发 明实施例在此不再详细赘述。
本发明实施例提供的 AP , 在具备多信道的 WLAN系统中, AP 仅在至少一个第一子信道上发送信标帧, 并在多信道中的每个子信 道上发送信息长度较小的信标指示帧来指示信标帧的配置信息, 以 便 STA根据信标指示帧获取接入 AP所需的接入信息, 并根据接入 AP所需的接入信息接入该 AP ,在确保 STA快速接入网络的前提下, 节省了网络开销。
并且, 在 STA接收到信标指示帧之后, 通过先进入休眠状态, 并在定时器的计时时间等于接收信标帧所需的剩余时间时, 再从休 眠状态转换为工作状态去接收信标帧, 从而节省了 STA的能量。 且 在 WLAN系统的系统信息即将发生变化时, 通过在事件通知信息提 前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节省了 STA的 能量。
实施例 7
本发明实施例 7提供一种 STA ,应用于 WLAN系统,所述 WLAN 系统包括 N个子信道, 所述 N个子信道中包含 A个第一子信道, N 为大于等于 2的正整数, A为小于 N的正整数, 如图 13所示, 所述 STA包括: 接收器 71、 处理器 72。
接收器 71 ,用于在所述 N个子信道中的任一个子信道上接收接 入点 AP 发送的信标指示帧; 其中, 所述信标指示帧用于指示信标 帧的配置信息, 所述信标帧由所述 AP 在至少一个所述第一子信道 上发送。
处理器 72 , 用于根据所述接收器 71 得到的所述信标指示帧获 取接入所述 AP所需的接入信息, 并根据所述接入所述 AP所需的接 入信息接入所述 AP。
在本发明实施例中, 进一步可选的, 所述信标指示帧中包括: 所述 AP的服务集标识 S SID、 每个发送所述信标帧的所述第一子信 道的信道标识以及与所述信道标识对应的发送所述信标帧的发送时 间。
在本发明实施例中, 进一步可选的, 当所述 AP 在一个所述第 一子信道上发送所述信标帧时, 所述处理器 72 , 具体用于:
根据与发送所述信标帧的所述第一子信道的信道标识对应的发 送所述信标帧的发送时间, 确定第一剩余时间; 所述第一剩余时间 为在发送所述信标帧的所述第一子信道上发送所述信标帧的剩余时 间;
启动定时器;
当所述定时器的计时时间等于所述第一剩余时间时, 根据所述 发送所述信标帧的所述第一子信道的信道标识接收所述信标帧; 其 中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
在本发明实施例中, 进一步可选的, 当所述 AP 在两个或两个 以上所述第一子信道上发送所述信标帧时, 所述处理器 72 , 具体用 于:
确定第一信道标识; 所述第一信道标识为用于接收所述信标帧 的第一子信道的信道标识;
根据与所述第一信道标识对应的发送所述信标帧的发送时间, 确定第二剩余时间; 其中, 所述第二剩余时间为在与所述第一信道 标识对应的所述第一子信道上发送所述信标帧的剩余时间;
启动定时器;
当所述定时器的计时时间等于所述第二剩余时间时, 根据所述 第一信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入 所述 AP所需的接入信息。
在本发明实施例中, 进一步可选的, 所述处理器 72 , 具体用于 根据所述信标指示帧, 将发送所述信标帧的发送时间中最早的发送 时间对应的信道标识确定为所述第一信道标识; 或者, 根据自身的 接收机射频能力确定自身支持的第一子信道的信道标识为所述第一 信道标识。
在本发明实施例中, 进一步可选的, 所述处理器 72 , 具体用于: 根据所述信标指示帧, 向所述 AP发送探测请求帧;
接收所述 AP 发送的探测响应帧; 其中, 所述探测响应帧中包 含所述接入所述 AP所需的接入信息。
在本发明实施例中, 进一步可选的, 所述接收器 71 , 还用于在 所述处理器 72 根据所述接入所述 AP 所需的接入信息接入所述 AP 之后, 在所述子信道上接收所述信标指示帧; 所述信标指示帧中还 包括: 事件通知信息, 并当所述事件通知信息用于指示所述 WLAN 系统的系统信息未改变时, 根据所述信标指示帧接收所述信标帧。
在本发明实施例中, 进一步可选的, 所述处理器 72 , 还用于当 所述事件通知信息用于指示改变的系统信息及所述改变的系统信息 发生改变的剩余时间时, 启动定时器。
所述接收器 71 , 还用于当所述定时器的计时时间等于所述改变 的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标 指示帧。
所述处理器 72 , 还用于根据所述接收器 71 得到的所述新的信 标指示帧获取新的信标帧, 并根据所述新的信标帧更新所述改变的 系统信息。
在本发明实施例中, 进一步的, 所述接收器 71 , 还用于在所述 处理器 72根据所述接入所述 AP所需的接入信息接入所述 AP之后, 在所述子信道上接收所述信标指示帧。
所述处理器 72 , 还用于当所述信标指示帧中包括事件通知信息 时, 启动定时器; 所述事件通知信息用于指示改变的系统信息及所 述改变的系统信息发生改变的剩余时间。
所述接收器 71 , 还用于当所述定时器的计时时间等于所述改变 的系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标 指示帧。
所述处理器 72 , 还用于根据所述接收器 71 得到的所述新的信 标指示帧获取新的信标帧, 并根据所述新的信标帧更新所述改变的 系统信息。
在本发明实施例中, 进一步可选的, 所述处理器 72 , 还用于在 所述启动定时器之前, 进入休眠状态。
在本发明实施例中, 进一步可选的, 所述接收器 71 , 具体用于 在已接入的子信道上或者在所述 N个子信道中的任意一个子信道上 接收所述信标指示帧。
在本发明实施例中, 进一步可选的, 所述第一子信道为主信道。 需要说明的是, 本发明实施例中所述的 WLAN系统的系统信息 可以包括但不限于以下信息中的一种或多种的组合: 信标帧的配置 信息、 WLAN系统中包含的 N个子信道中有哪些子信道为第一子信 道、在 WLAN系统中包含的 N个子信道中有哪些子信道为第二子信 道, 其中第二子信道为 WLAN系统的 N个子信道中除第一子信道之 外的子信道。 需要说明的是, 本发明实施例中所述的 STA指的是手机、 终端 等具有 Wi-Fi功能的电子设备, 本发明实施例在此对 STA不做具体 限制。
需要说明的是, 本发明实施例提供的 STA中功能模块的具体描 述可以参考方法实施例及装置实施例中对应内容的具体描述, 本发 明实施例在此不再详细赘述。
本发明实施例提供的 STA , 在具备多信道的 WLAN系统中, AP 仅在至少一个第一子信道上发送信标帧, 并在多信道中的每个子信 道上发送信息长度较小的信标指示帧来指示信标帧的配置信息, 以 便 STA根据信标指示帧获取接入 AP所需的接入信息, 并根据接入 AP所需的接入信息接入该 AP ,在确保 STA快速接入网络的前提下, 节省了网络开销。
并且, 在 STA接收到信标指示帧之后, 通过先进入休眠状态, 并在定时器的计时时间等于接收信标帧所需的剩余时间时, 再从休 眠状态转换为工作状态去接收信标帧, 从而节省了 STA的能量。 且 在 WLAN系统的系统信息即将发生变化时, 通过在事件通知信息提 前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节省了 STA的 能量。
实施例 8
本发明实施例 8提供一种信标帧的发送系统, 应用于 WLAN系 统, 所述 WLAN 系统包括 N个子信道, 所述 N个子信道中包含 A 个第一子信道, N为大于等于 2 的正整数, A为小于 N的正整数, 如图 14所示, 所述信标帧的发送系统包括, AP81、 STA82。
其中, 所述 AP81 , 用于在所述 N 个子信道中的每个子信道上 发送信标指示帧, 所述信标指示帧用于指示信标帧的配置信息; 并 在至少一个所述第一子信道上发送所述信标帧。
所述 STA82 , 用于在所述 N个子信道中的任一个子信道上接收 接入点 AP81 发送的信标指示帧; 根据所述信标指示帧获取接入所 述 AP81 所需的接入信息; 根据所述接入所述 AP81 所需的接入信息 接入所述 AP81。
需要说明的是, 本发明实施例提供的信标帧的发送系统中功能 模块的具体描述可以参考方法实施例及装置实施例中对应内容的具 体描述, 本发明实施例在此不再详细赘述。
本发明 实施例提供的信标帧的发送系统, 在具备多信道的 WLAN系统中, AP仅在至少一个第一子信道上发送信标帧, 并在多 信道中的每个子信道上发送信息长度较小的信标指示帧来指示信标 帧的配置信息, 以便 STA根据信标指示帧获取接入 AP所需的接入 信息, 并根据接入 AP所需的接入信息接入该 AP , 在确保 STA快速 接入网络的前提下, 节省了网络开销。
并且, 在 STA接收到信标指示帧之后, 通过先进入休眠状态, 并在定时器的计时时间等于接收信标帧所需的剩余时间时, 再从休 眠状态转换为工作状态去接收信标帧, 从而节省了 STA的能量。 且 在 WLAN系统的系统信息即将发生变化时, 通过在事件通知信息提 前告知 STA , 避免了 STA连续跟踪网络变化, 进一步节省了 STA的 能量。
通过以上的实施方式的描述, 所属领域的技术人员可以清楚地 了解到, 为描述的方便和简洁, 仅以上述各功能模块的划分进行举 例说明, 实际应用中, 可以根据需要而将上述功能分配由不同的功 能模块完成, 即将装置的内部结构划分成不同的功能模块, 以完成 以上描述的全部或者部分功能。 上述描述的装置的具体工作过程, 可以参考前述方法实施例中的对应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的装置 和方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施 例仅仅是示意性的, 例如, 所述模块或单元的划分, 仅仅为一种逻 辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单元或 组件可以结合或者可以集成到另一个装置, 或一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直接耦合或 通信连接可以是通过一些接口, 装置或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分 开的, 作为单元显示的部件可以是一个物理单元或多个物理单元, 即可以位于一个地方, 或者也可以分布到多个不同地方。 可以根据 实际的需要选择其中的部分或者全部单元来实现本实施例方案的目 的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处 理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以 上单元集成在一个单元中。 上述集成的单元既可以采用硬件的形式 实现, 也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的 产品销售或使用时, 可以存储在一个可读取存储介质中。 基于这样 的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部 分或者该技术方案的全部或部分可以以软件产品的形式体现出来, 该软件产品存储在一个存储介质中, 包括若干指令用以使得一个设 备 (可以是单片机, 芯片等) 或处理器 ( processor ) 执行本发明各 个实施例所述方法的全部或部分步骤。 而前述的存储介质包括: U 盘、 移动硬盘、 只读存储器 ( ROM , Read-Only Memory ) , 随机存 取存储器 ( RAM , Random Access Memory )、 磁碟或者光盘等各种 可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围 并不局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技 术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应所述以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种接入点 AP , 其特征在于, 应用于无线局域网 WLAN 系 统, 所述 WLAN系统包括 N个子信道, 所述 N个子信道中包含 A个 第一子信道, N为大于等于 2的正整数, A为小于 N的正整数, 所述 AP包括:
第一发送单元, 用于在所述 N 个子信道中的每个子信道上发送 信标指示帧; 所述信标指示帧用于指示信标帧的配置信息;
第二发送单元,用于在至少一个所述第一子信道上发送所述信标 帧。
2、 根据权利要求 1所述的 AP , 其特征在于,
所述信标指示帧中包括: 所述 AP 的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
3、 根据权利要求 2所述的 AP , 其特征在于,
所述信标指示帧中还包括:与每个所述发送所述信标帧的所述第 一子信道的信道标识对应的发送所述信标帧的时间间隔。
4、 根据权利要求 2所述的 AP , 其特征在于,
所述信标指示帧中还包括: 事件通知信息; 其中, 在所述 WLAN 系统的系统信息未改变时, 所述事件通知信息用于指示所述 WLAN 系统的系统信息未改变; 在所述 WLAN 系统的系统信息改变时, 所 述事件通知信息用于指示改变的系统信息及所述改变的系统信息发 生改变的剩余时间。
5、 根据权利要求 2所述的 AP , 其特征在于,
在所述 WLAN 系统的系统信息改变时, 所述信标指示帧中还包 括: 事件通知信息; 所述事件通知信息用于指示改变的系统信息及所 述改变的系统信息发生改变的剩余时间。
6、 根据权利要求 1 -5 中任一项所述的 AP , 其特征在于, 所述第 一子信道为主信道。
7、 一种站点 STA , 其特征在于, 应用于无线局域网 WLAN系统, 所述 WLAN系统包括 N个子信道, 所述 N个子信道中包含 A个第一 子信道, N为大于等于 2的正整数, A为小于 N的正整数, 所述 STA 包括:
接收单元, 用于在所述 N 个子信道中的任一个子信道上接收接 入点 AP发送的信标指示帧; 其中, 所述信标指示帧用于指示信标帧 的配置信息, 所述信标帧由所述 AP在至少一个所述第一子信道上发 送;
获取单元,用于根据所述接收单元得到的所述信标指示帧获取接 入所述 AP所需的接入信息;
接入单元, 用于根据所述获取单元得到的所述接入所述 AP所需 的接入信息接入所述 AP。
8、 根据权利要求 7所述的 STA , 其特征在于,
所述信标指示帧中包括: 所述 AP 的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
9、 根据权利要求 8所述的 STA , 其特征在于, 当所述 AP在一 个所述第一子信道上发送所述信标帧时, 所述获取单元, 包括:
第一确定模块,用于根据与发送所述信标帧的所述第一子信道的 信道标识对应的发送所述信标帧的发送时间, 确定第一剩余时间; 所 述第一剩余时间为在发送所述信标帧的所述第一子信道上发送所述 信标帧的剩余时间;
第一启动模块, 用于启动定时器;
第一接收模块,用于当所述定时器的计时时间等于所述第一剩余 时间时, 根据所述发送所述信标帧的所述第一子信道的信道标识接收 所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP所需的接入 信息。
10、 根据权利要求 8所述的 STA , 其特征在于, 当所述 AP在两 个或两个以上所述第一子信道上发送所述信标帧时, 所述获取单元, 包括: 第二确定模块, 用于确定第一信道标识; 所述第一信道标识为用 于接收所述信标帧的第一子信道的信道标识;
所述第二确定模块,还用于根据与所述第一信道标识对应的发送 所述信标帧的发送时间, 确定第二剩余时间; 其中, 所述第二剩余时 间为在与所述第一信道标识对应的所述第一子信道上发送所述信标 帧的剩余时间;
第二启动模块, 用于启动定时器;
第二接收模块,用于当所述定时器的计时时间等于所述第二剩余 时间时, 根据所述第一信道标识接收所述信标帧; 其中, 所述信标帧 中包含所述接入所述 AP所需的接入信息。
1 1、 根据权利要求 10所述的 STA , 其特征在于, 所述第二确定 模块, 具体用于:
根据所述信标指示帧,将发送所述信标帧的发送时间中最早的发 送时间对应的信道标识确定为所述第一信道标识;
或者,根据自身的接收机射频能力确定自身支持的第一子信道的 信道标识为所述第一信道标识。
12、 根据权利要求 8所述的 STA , 其特征在于, 所述获取单元, 包括:
发送模块, 用于根据所述信标指示帧, 向所述 AP发送探测请求 帧;
第三接收模块, 用于接收所述 AP发送的探测响应帧; 其中, 所 述探测响应帧中包含所述接入所述 AP所需的接入信息。
13、 根据权利要求 8所述的 STA , 其特征在于,
所述接收单元, 还用于在所述接入单元根据所述接入所述 AP所 需的接入信息接入所述 AP之后, 在所述子信道上接收所述信标指示 帧, 所述信标指示帧中还包括: 事件通知信息; 并当所述事件通知信 息用于指示所述 WLAN 系统的系统信息未改变时, 根据所述信标指 示帧接收所述信标帧。
14、 根据权利要求 13所述的 STA , 其特征在于, 所述 STA还包 括:
启动单元,用于当所述事件通知信息用于指示改变的系统信息及 所述改变的系统信息发生改变的剩余时间时, 启动定时器;
所述接收单元,还用于当所述定时器的计时时间等于所述改变的 系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标指示 帧;
所述获取单元,还用于根据所述接收单元得到的所述新的信标指 示帧获取新的信标帧;
更新单元,用于根据所述获取单元得到的所述新的信标帧更新所 述改变的系统信息。
15、 根据权利要求 8所述的 STA , 其特征在于,
所述接收单元, 还用于在所述接入单元根据所述接入所述 AP所 需的接入信息接入所述 AP之后, 在所述子信道上接收所述信标指示 帧;
所述启动单元,还用于当所述接收单元得到的所述信标指示帧中 包括事件通知信息时, 启动定时器; 所述事件通知信息用于指示改变 的系统信息及所述改变的系统信息发生改变的剩余时间;
所述接收单元,还用于当所述定时器的计时时间等于所述改变的 系统信息发生改变的剩余时间时, 在所述子信道上接收新的信标指示 帧;
所述获取单元,还用于根据所述接收单元得到的所述新的信标指 示帧获取新的信标帧;
所述更新单元,还用于根据所述获取单元得到的所述新的信标帧 更新所述改变的系统信息。
16、 根据权利要求 9或 10所述的 STA , 其特征在于, 所述 STA 还包括:
处理单元,用于在所述第一启动模块或第二启动模块启动定时器 之前, 进入休眠状态。
17、 根据权利要求 14或 15所述的 STA , 其特征在于, 所述处理单元, 还用于在所述启动单元启动定时器之前, 进入休 眠状态。
18、 根据权利要求 14或 15所述的 STA , 其特征在于,
所述接收单元, 具体用于在已接入的子信道上或者在所述 N 个 子信道中的任意一个子信道上接收所述信标指示帧。
19、 根据权利要求 7- 18 中任一项所述的 STA , 其特征在于, 所 述第一子信道为主信道。
20、 一种信标帧的发送方法, 其特征在于, 应用于无线局域网 WLAN系统, 所述 WLAN系统包括 N个子信道, 所述 N个子信道中 包含 A个第一子信道, N为大于等于 2 的正整数, A为小于 N的正 整数, 所述方法包括:
接入点 AP 在所述 N 个子信道中的每个子信道上发送信标指示 帧; 所述信标指示帧用于指示信标帧的配置信息;
在至少一个所述第一子信道上发送所述信标帧。
21、 根据权利要求 20所述的方法, 其特征在于,
所述信标指示帧中包括: 所述 AP 的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
22、 根据权利要求 21所述的方法, 其特征在于,
所述信标指示帧中还包括:与每个所述发送所述信标帧的所述第 一子信道的信道标识对应的发送所述信标帧的时间间隔。
23、 根据权利要求 21所述的方法, 其特征在于,
所述信标指示帧中还包括: 事件通知信息; 其中, 在所述 WLAN 系统的系统信息未改变时, 所述事件通知信息用于指示所述 WLAN 系统的系统信息未改变; 在所述 WLAN 系统的系统信息改变时, 所 述事件通知信息用于指示改变的系统信息及所述改变的系统信息发 生改变的剩余时间。
24、 根据权利要求 21所述的方法, 其特征在于,
在所述 WLAN 系统的系统信息改变时, 所述信标指示帧中还包 括: 事件通知信息; 所述事件通知信息用于指示改变的系统信息及所 述改变的系统信息发生改变的剩余时间。
25、 根据权利要求 20-24中任一项所述的方法, 其特征在于, 所 述第一子信道为主信道。
26、 一种信标帧的发送方法, 其特征在于, 应用于无线局域网 WLAN系统, 所述 WLAN系统包括 N个子信道, 所述 N个子信道中 包含 A个第一子信道, N为大于等于 2 的正整数, A为小于 N的正 整数, 所述方法包括:
站点 STA在所述 N个子信道中的任一个子信道上接收接入点 AP 发送的信标指示帧; 其中, 所述信标指示帧用于指示信标帧的配置信 息, 所述信标帧由所述 AP在至少一个所述第一子信道上发送;
根据所述信标指示帧获取接入所述 AP所需的接入信息; 根据所述接入所述 AP所需的接入信息接入所述 AP。
27、 根据权利要求 26所述的方法, 其特征在于,
所述信标指示帧中包括: 所述 AP 的服务集标识 SSID、 每个发 送所述信标帧的所述第一子信道的信道标识以及与所述信道标识对 应的发送所述信标帧的发送时间。
28、 根据权利要求 27 所述的方法, 其特征在于, 当所述 AP在 一个所述第一子信道上发送所述信标帧时, 所述根据所述信标指示帧 获取接入所述 AP所需的接入信息, 包括:
根据与发送所述信标帧的所述第一子信道的信道标识对应的发 送所述信标帧的发送时间, 确定第一剩余时间; 所述第一剩余时间为 在发送所述信标帧的所述第一子信道上发送所述信标帧的剩余时间; 启动定时器;
当所述定时器的计时时间等于所述第一剩余时间时,根据所述发 送所述信标帧的所述第一子信道的信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
29、 根据权利要求 27 所述的方法, 其特征在于, 当所述 AP在 两个或两个以上所述第一子信道上发送所述信标帧时, 所述根据所述 信标指示帧获取接入所述 AP所需的接入信息, 包括:
确定第一信道标识;所述第一信道标识为用于接收所述信标帧的 第一子信道的信道标识;
根据与所述第一信道标识对应的发送所述信标帧的发送时间,确 定第二剩余时间; 其中, 所述第二剩余时间为在与所述第一信道标识 对应的所述第一子信道上发送所述信标帧的剩余时间;
启动定时器;
当所述定时器的计时时间等于所述第二剩余时间时,根据所述第 一信道标识接收所述信标帧; 其中, 所述信标帧中包含所述接入所述 AP所需的接入信息。
30、 根据权利要求 29所述的方法, 其特征在于, 所述确定第一 信道标识, 包括:
根据所述信标指示帧,将发送所述信标帧的发送时间中最早的发 送时间对应的信道标识确定为所述第一信道标识;
或者,根据自身的接收机射频能力确定自身支持的第一子信道的 信道标识为所述第一信道标识。
3 1、 根据权利要求 27所述的方法, 其特征在于, 所述根据所述 信标指示帧获取接入所述 AP所需的接入信息, 包括:
根据所述信标指示帧, 向所述 AP发送探测请求帧;
接收所述 AP发送的探测响应帧; 其中, 所述探测响应帧中包含 所述接入所述 AP所需的接入信息。
32、 根据权利要求 27所述的方法, 其特征在于, 在所述根据所 述接入所述 AP所需的接入信息接入所述 AP之后, 还包括:
在所述子信道上接收所述信标指示帧; 所述信标指示帧中还包 括: 事件通知信息;
当所述事件通知信息用于指示所述 WLAN 系统的系统信息未改 变时, 根据所述信标指示帧接收所述信标帧。
33、 根据权利要求 32所述的方法, 其特征在于, 还包括: 当所述事件通知信息用于指示改变的系统信息及所述改变的系 统信息发生改变的剩余时间时, 启动定时器;
当所述定时器的计时时间等于所述改变的系统信息发生改变的 剩余时间时, 在所述子信道上接收新的信标指示帧;
根据所述新的信标指示帧获取新的信标帧,并根据所述新的信标 帧更新所述改变的系统信息。
34、 根据权利要求 27所述的方法, 其特征在于, 在所述根据所 述接入所述 AP所需的接入信息接入所述 AP之后, 还包括:
在所述子信道上接收所述信标指示帧;
当所述信标指示帧中包括事件通知信息时, 启动定时器; 所述事 件通知信息用于指示改变的系统信息及所述改变的系统信息发生改 变的剩余时间;
当所述定时器的计时时间等于所述改变的系统信息发生改变的 剩余时间时, 在所述子信道上接收新的信标指示帧;
根据所述新的信标指示帧获取新的信标帧,并根据所述新的信标 帧更新所述改变的系统信息。
35、 根据权利要求 28、 29、 33、 34 中任一项所述的方法, 其特 征在于, 在所述启动定时器之前, 还包括:
进入休眠状态。
36、 根据权利要求 33或 34所述的方法, 其特征在于, 所述在所 述子信道上接收所述信标指示帧, 包括:
在已接入的子信道上或者在所述 N 个子信道中的任意一个子信 道上接收所述信标指示帧。
37、 根据权利要求 26-36中任一项所述的方法, 其特征在于, 所 述第一子信道为主信道。
38、 一种信标帧的发送系统, 其特征在于, 应用于无线局域网 WLAN系统, 所述 WLAN系统包括 N个子信道, 所述 N个子信道中 包含 A个第一子信道, N为大于等于 2 的正整数, A为小于 N的正 整数, 包括:
如权利要求 1 -6中任一项所述的接入点 AP ; 以及如权利要求 7-19中任一项所述的站点 STA,
PCT/CN2014/085226 2014-02-27 2014-08-26 一种接入点、站点、信标帧的发送方法及系统 WO2015127771A1 (zh)

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