WO2015089770A1 - Wlan系统中sta状态转移的方法和设备 - Google Patents

Wlan系统中sta状态转移的方法和设备 Download PDF

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Publication number
WO2015089770A1
WO2015089770A1 PCT/CN2013/089843 CN2013089843W WO2015089770A1 WO 2015089770 A1 WO2015089770 A1 WO 2015089770A1 CN 2013089843 W CN2013089843 W CN 2013089843W WO 2015089770 A1 WO2015089770 A1 WO 2015089770A1
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WO
WIPO (PCT)
Prior art keywords
sta
paging
data
sent
response
Prior art date
Application number
PCT/CN2013/089843
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English (en)
French (fr)
Inventor
罗俊
张佳胤
马驰翔
Original Assignee
华为技术有限公司
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 filed Critical 华为技术有限公司
Priority to PCT/CN2013/089843 priority Critical patent/WO2015089770A1/zh
Priority to CN201380078430.9A priority patent/CN105453690A/zh
Publication of WO2015089770A1 publication Critical patent/WO2015089770A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present invention relates to data communication technologies, and in particular, to a method and device for STA state transition in a WLAN system.
  • WLAN Wireless Local Area Network
  • MAC Media Access Control
  • the MAC layer uses the carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) mechanism to access the channel. Its MAC efficiency has always been one of the most widely concerned issues in WLAN systems. .
  • the data is transmitted by the contention channel.
  • the station STATION, referred to as STA
  • STA station
  • the station also intermittently sends some management frames such as probe requests.
  • the transmission of these management frames also requires a contention channel to complete.
  • APs access points
  • STAs such as stadiums, airports/train stations, etc.
  • APs access points
  • STAs such as stadiums, airports/train stations, etc.
  • the STA also needs channel contention when sending management frames, which affects the channel competition of STAs with large data requirements, triggers large-scale inter-node contention conflicts, and reduces the overall MAC efficiency of the network.
  • the WLAN system defines two different energy saving modes: a Traffic Indication Map (TIM) and a Delivery Traffic Indication Map (Delivery Traffic Indication Map).
  • TIM Traffic Indication Map
  • DTIM Delivery Traffic Indication Map
  • TIM and DTIM information are transmitted in beacon frames.
  • the STA performs the power saving state, and the STA does not send any data in the power saving state.
  • the AP when the AP has data to send to the STA, the AP includes the STA ID to be notified in the TIM information.
  • the STA that is in the power-saving state has the downlink data.
  • the STA After the STA hears that the TIM contains its own ID, the STA sends a PS-Poll message to the AP to notify the AP that it is ready to start receiving data.
  • the AP broadcasts a data packet that may be sent. The STA wakes up at the DTIM time to receive the data packet without sending a poll message.
  • the TIM/DTIM technology can reduce the transmission of a large number of management frames by STAs without data or sporadic data, the STA needs to enter a power-saving state, and all management frames cannot be transmitted in the power-saving state. In practical applications, the STA still needs to send some management frames in the energy-saving state.
  • the TIM/DTIM technology is not fully suitable for the improvement of MAC efficiency.
  • a first aspect of the present invention provides a station STA, including:
  • a determining module configured to: when the STA is in a connected state, determine that the STA does not receive or send data during the waiting period;
  • a sending module configured to send a connection release request to the access point AP after the determining module determines that the STA does not receive or send data within the waiting time
  • a receiving module configured to receive a connection release response sent by the AP
  • a state adjustment module configured to transfer the STA from a connected state to an idle state according to the connection release response, or maintain a connected state according to the connection release response.
  • the determining module is further configured to: determine whether the STA has data transmission or reception;
  • the sending module is further configured to: if the STA has data transmission or reception, send a connection establishment request to the AP;
  • the receiving module is further configured to: receive a connection establishment response sent by the AP;
  • the state adjustment module is further configured to: transfer the STA from an idle state to a connected state according to the connection establishment response, or maintain an idle state according to the connection establishment response.
  • the determining module is specifically configured to: receive a first paging message sent by the AP, where the first paging message includes the STA The first paging message is sent to the STA when the AP has data to send to the STA;
  • the determining module is specifically configured to: send a second paging request message to the AP;
  • the determining module is specifically configured to: determine data to be sent in the sending buffer, and determine that the STA has data to send.
  • the determining module before receiving the first paging message sent by the AP, is further configured to:
  • the sending module is further configured to: Said AP sends a management frame;
  • the receiving module is further configured to: receive a management frame sent by the AP.
  • a second aspect of the present invention provides an access point AP, including:
  • a receiving module configured to receive a connection release request sent by the STA, where the connection release request is determined by the STA to be sent to the AP when no data is received or sent within the waiting time period;
  • a determining module configured to determine whether to allow the STA to be transferred from the connected state to the idle state
  • a sending module configured to return a connection release response to the STA according to the determining result of the determining module, where the connection release response is used to indicate The STA transitions from the connected state to the idle state, or indicates that the STA remains in the connected state.
  • the receiving module is further configured to:
  • connection establishment request is the STA Sending to the AP when it has data to send or receive;
  • the determining module is further configured to: determine whether to allow the STA to transition from an idle state to a connected state;
  • the sending module is further configured to: send a connection establishment response to the STA according to the determination result of the determining module, where the connection establishment response is used to indicate that the STA transits from an idle state to a connected state, or The STA remains idle.
  • the sending module when the AP has data sent to the STA, the sending module is further configured to: send a first paging message to the STA to notify the The STA has data to receive, and the first paging message includes an identifier of the STA.
  • the receiving module is further configured to: receive a second paging request message sent by the STA;
  • the sending module sends the first homing message to the STA to notify the STA that there is data to be received, and is further configured to:
  • the paging capability, the paging interval, and the paging duration are broadcasted, so that the STA receives the first paging message sent by the AP according to the paging capability, the paging interval, and the paging duration.
  • the sending module is specifically configured to: send the first paging message to the STA according to a preset period.
  • a third aspect of the present invention provides a method for transferring a STA state in a WLAN system, including: when a STA is in a connected state, the STA determines that it does not receive or transmit data within a waiting time, and sends a connection to the access point AP. Release request
  • the STA receives a connection release response sent by the AP, transitions from the connection state to the idle state according to the connection release response, or the STA maintains the connection state according to the connection release response.
  • the receiving, by the STA, the connection release response sent by the AP, after the connection release response is changed from the connection state to the idle state the method further includes:
  • the STA determines that it has data transmission or reception, and the STA sends a connection establishment request to the AP; Receiving, by the STA, a connection establishment response sent by the AP, transitioning from an idle state to a connection state according to the connection establishment response, or the STA maintaining an idle state according to the connection establishment response.
  • the determining, by the STA, that the data is received by the STA includes:
  • the determining, by the STA, that the data is received by the STA includes:
  • the determining that the STA has data transmission includes:
  • the STA determines the data to be transmitted in the transmission buffer, and determines that it has data to transmit. In a fifth possible implementation manner of the third aspect of the present invention, the STA is receiving the
  • the method further includes:
  • the STA receives the paging capability, the paging interval, and the paging duration sent by the AP, and receives the first paging message sent by the AP according to the paging capability, the paging interval, and the paging duration.
  • the receiving, by the STA, the connection establishment response sent by the AP, after the connection establishment response is changed from the idle state to the connection state the method further includes:
  • the STA sends a management frame to the AP, or the STA receives a management frame sent by the AP.
  • a fourth aspect of the present invention provides a method for STA state transition in a WLAN system, including: The access point AP receives the connection release request sent by the station STA, and the connection release request is that the STA sends to the AP when there is no data receiving or sending within the waiting time period when the STA is in the connection state;
  • connection release response is used to instruct the STA to transition from the connected state to the idle state
  • the AP sends a connection release response to the STA, and the connection release response is used to indicate that the STA remains in a connected state.
  • the method further includes: the AP receiving station a connection establishment request sent by the STA, where the connection establishment request is sent to the AP when the STA determines that it has data transmission or reception;
  • connection establishment response is used to indicate that the STA transits from an idle state to a connection state, or indicates that the STA remains in an idle state.
  • the method further includes:
  • the AP When the AP has data to send to the STA, the AP sends a first paging message to the STA to notify the STA that there is data to receive, and the first paging message includes the identifier of the STA.
  • the method further includes:
  • the AP returns a second paging response to the STA according to the second paging request message, where the second paging response includes an identifier of the STA.
  • the method before the sending, by the AP, the first homing message to the STA to notify the STA that the data is to be received, the method further includes:
  • the AP broadcasts its paging capability, paging interval, and paging duration, so that the STA receives the first paging message sent by the AP according to the paging capability, the paging interval, and the paging duration.
  • the sending, by the AP, the first paging message to the STA, to notify the STA that the data is to be received includes: The AP sends a first paging message to the STA according to a preset period to notify the STA that there is data to receive.
  • the method and device for STA state transition in the WLAN system introduces an idle state and a connection state of the STA, so that a large number of STAs without data or sporadic data enter an idle state, and the STA that enters the idle state reduces the management frame.
  • FIG. 1 is a schematic structural diagram of a STA according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of another STA according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic structural diagram of an AP according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of Embodiment 1 of a method for STA state transition in a WLAN system according to the present invention
  • FIG. 5 is a flowchart of Embodiment 2 of a method for STA state transition in a WLAN system according to the present invention
  • FIG. 7 is a flowchart of a method for performing a state transition of a STA in a WLAN system according to Embodiment 4 of the present invention
  • Embodiment 8 is a signaling flow diagram of Embodiment 5 of a method for STA state transition in a WLAN system according to the present invention.
  • FIG. 9 is a schematic structural diagram of still another STA according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another AP according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of a STA according to an embodiment of the present invention.
  • the STA provided by this embodiment includes: a determining module 11 , a sending module 12 , a receiving module 13 , and a state adjusting module 14 .
  • the determining module 11 is configured to determine that the STA does not receive or transmit data during the waiting time when the STA is in the connected state.
  • the idle state (radio_IDLE) and the connection state of the STA are introduced.
  • the STA (radio-connected), allows STAs with no data or sporadic data to enter the idle state when no data is sent. After the STA enters the idle state, the STA configured to enter the idle state reduces the transmission of the management frame.
  • the determining module 11 determines whether the STA has no data to transmit or receive during the waiting period.
  • the sending module 12 is configured to send a connection release request to the access point AP after the determining module 11 determines that the STA does not receive or transmit data within the waiting time.
  • the transmitting module 12 sends a connection release request to the AP to request a transition from the connected state to the idle state.
  • the receiving module 13 is configured to receive a connection release response sent by the AP.
  • the state adjustment module 14 is configured to transfer the STA from the connected state to the idle state according to the connection release response, or maintain the connected state according to the connection release response.
  • the AP After receiving the connection release request sent by the STA, the AP determines whether to allow the state to be transferred to the STA, and returns a connection release response to the STA. If the AP allows the STA to perform state transition, the state adjustment module 14 transfers from the connection state to the connection release response according to the connection release request. In the idle state, if the AP does not allow the STA to perform state transition, the state adjustment module 14 maintains the connection state according to the connection release response, thereby implementing management of the STA by the AP.
  • the STA does not turn off the receiver and the transmitter in the idle state, and the STA can still send data, but the STA reduces the transmission of the management frame in the idle state, and the STA has no data or sporadic data. It will enter the idle state. For the STA in the idle state, the frequency of the management frame transmission can be reduced. If there is a large amount of data to be sent, the STA sends the pipe every 10 seconds. For a STA in an idle state, it can be configured to send a management frame 20 seconds or 30 seconds or even longer, and reduce the transmission of the management frame for STAs without data or sporadic data. The normal data transmission of the STA, but reducing the transmission of such STA management frames, can avoid such STAs from competing with the STAs having a large amount of data to be transmitted, thereby improving the MAC efficiency of the entire system.
  • the STA provided in this embodiment introduces the idle state and the connection state of the STA, so that a large number of STAs without data or sporadic data enter an idle state, and the STA that enters the idle state reduces the transmission of the management frame, and reduces the number of management frames sent by such STAs.
  • FIG. 2 is a schematic structural diagram of another STA according to an embodiment of the present invention.
  • the STA provided in this embodiment includes: a determining module 21, a sending module 22, a receiving module 23, and a state adjusting module 24.
  • the determining module 21 is configured to: when the STA is in a connected state, determine that the STA does not receive or send data during the waiting period;
  • the sending module 22 is configured to send, after the determining module 21, that the STA does not receive or send data within the waiting time, send a connection release request to the access point AP;
  • the receiving module 23 is configured to receive a connection release response sent by the AP.
  • the state adjustment module 24 is configured to transfer the STA from the connected state to the idle state according to the connection release response, or maintain the connected state according to the connection release response.
  • the determining module 21 is further configured to: determine whether the STA has data transmission or reception, and if the STA has data transmission or reception, the sending module 22 sends a connection establishment request to the AP, requesting to transfer from the idle state.
  • the AP returns a connection establishment response to the STA according to the connection establishment request
  • the receiving module 23 receives the connection establishment response sent by the AP
  • the state adjustment module 24 transfers the STA from the idle state to the connection state according to the connection establishment response, or according to the connection establishment. The response remains idle.
  • the determining module 21 determines that the STA has data to receive in the following two ways:
  • the AP when the AP has data to send to the STA, the AP actively sends a first paging message to the STA, and the determining module 21 receives the first paging message sent by the AP, and the first paging
  • the message includes the identifier of the STA, and the determining module 21 determines, according to the identifier of the STA included in the first paging message, that the STA has data to receive.
  • the AP also needs to broadcast its paging capability, paging interval, paging duration, etc., so that the determining module 21 is in accordance with the paging capability, paging interval, and paging duration of the AP.
  • the time receives the first paging message sent by the AP.
  • the AP may broadcast paging related information in a beacon frame or a probe response. Specifically, a paging capability field, a paging interval field, and a paging interval field may be added to the beacon frame or the probe response frame. Paging duration field.
  • the STA sends a second paging request message to the AP to check whether there is downlink data for itself. If yes, the AP replies with a second paging response with the STA ID to notify the STA. There is downlink data.
  • the determining module 21 receives the second paging response returned by the AP, where the second paging response includes the identifier of the STA, and the determining module 21 finds that the second paging response includes the identifier of the STA, and determines that the STA has data reception.
  • the determining module 21 determines that the STA has data transmission, specifically, determining whether there is data to be sent in the STA's transmission buffer, and if so, determining that the STA has data to send.
  • the sending module 22 is further configured to: send a management frame to the AP; and the receiving module 23 is further configured to: receive the management frame sent by the AP.
  • the sending module 22 sends a connection establishment request to the AP, requesting to transition from the idle state to the connected state, where The STA has data to send including the STA having a management frame to send.
  • the AP determines whether the STA is to be transferred from the idle state to the connected state. For example, the AP receives the connection establishment request sent by the STA, and then determines whether the data of the STA currently accessing the network is If the number of STAs that are currently connected to the network exceeds the threshold, the number of STAs accessing the network is already large.
  • the AP can reject the STA from the idle state to the connected state, and the AP is in the STA.
  • the returned connection setup response indicates that the STA remains idle, thereby reducing the transmission of the STA management frame and preventing the STA from competing with other STAs for the channel. If the number of STAs currently accessed by the network is less than the threshold, the AP allows the STA to transition from the idle state to the connected state, and the AP instructs the STA to transition from the idle state to the connected state in the connection establishment response returned to the STA.
  • the AP can also determine whether to allow the STA to move from the idle state to other states through other conditions.
  • the STA provided in this embodiment introduces an idle state of the STA, so that the STA that has no data transmission or the spurious data to be sent enters an idle state, reduces the transmission of the management frame for the STA that enters the idle state, and sends the paging and the STA initiative through the AP.
  • the manner of paging is used to notify the STA that there is downlink data, so that the STA can normally send the necessary management frames, which can reduce the competition of the entire network competition without affecting the transmission of such STA management frames, so as to improve the WLAN system in the dense deployment scenario. MAC efficiency.
  • FIG. 3 is a schematic structural diagram of an AP according to an embodiment of the present invention.
  • the AP provided in this embodiment includes: a receiving module 31, a determining module 32, and a sending module 33.
  • the receiving module 31 is configured to receive a connection release request sent by the STA, where the connection release request is determined by the STA to be sent to the AP when no data is received or sent within the waiting time.
  • the STA When the STA is in the connected state, if the STA does not send or receive any data within the waiting time, the STA sends a connection release request to the AP, requesting to transition from the connected state to the idle state, and the receiving module 31 receives the connection release request sent by the STA.
  • a determining module 32 configured to determine whether to allow the STA to transition from the connected state to the idle state; the sending module 33, configured to return a connection release response to the STA according to the determination result of the determining module 32, where the connection release response is used to instruct the STA to transfer from the connected state Go to the idle state or indicate that the STA remains connected.
  • the determining module 32 determines whether to allow the state to be transferred to the STA. For example, the determining module 32 determines whether the data of the STA currently accessing the network reaches a preset threshold. The number of STAs accessing the network exceeds the threshold, indicating that there are many STAs accessing the network. In this case, the AP can reject the STA from the idle state to the connected state, and the AP indicates the STA in the connection establishment response returned to the STA. The idle state is maintained, thereby reducing the transmission of the STA management frame, and avoiding the STA competing with other STAs for the channel.
  • the AP allows the STA to transition from the idle state to the connected state, and the AP instructs the STA to transition from the idle state to the connected state in the connection establishment response returned to the STA.
  • the determining module 32 can also determine whether to allow the STA to transfer from the idle state to other states through other conditions.
  • the sending module 33 indicates the STA in returning the connection release response to the STA. From the connected state to the idle state, if the STA is not allowed to transition from the connected state to the idle state, the transmitting module 33 instructs the STA to maintain the connected state in returning the connection release response to the STA.
  • the receiving module 31 further receives a connection establishment request sent by the STA, and the connection establishment request is sent to the AP when the STA determines that it has data transmission or reception.
  • the determining module 32 is further configured to: determine whether to allow the STA to transition from the idle state to the connected state; if the STA is allowed to transition from the idle state to the connected state, the sending module 33 instructs the STA to transfer from the idle state to the connection in sending a connection setup response to the STA State, if the STA is not allowed to transition from the idle state to the connected state, the transmitting module 33 instructs the STA to remain in an idle state in transmitting a connection setup response to the STA.
  • the sending module 33 is further configured to: send a first paging message to the STA to notify the STA that there is data to be received, and the first paging message includes the identifier of the STA.
  • the STA determines, according to the identifier of the STA included in the first paging message, that it has data to receive, and then receives data sent by the AP at a corresponding time.
  • the sending module 33 sends a first homing message to the STA to notify the STA that there is data to be received, and is further configured to: broadcast its paging capability, paging interval, paging duration, so that the STA according to paging capability, paging interval, and homing
  • the call duration receives the first paging message sent by the AP.
  • the sending module 33 can periodically send the first paging message to the STA according to a preset period.
  • the receiving module 31 receives the second paging request message sent by the STA; if the AP has data to send to the STA, , the STA is replied to the second paging response with the STA identifier.
  • Embodiment 1 is a flowchart of Embodiment 1 of a method for STA state transition in a WLAN system according to the present invention. As shown in FIG. 4, the method provided in this embodiment includes the following steps:
  • Step 101 When the STA is in the connected state, the STA determines that it has no data to receive or send within the waiting time, and sends a connection release request to the AP.
  • the idle state (radio_IDLE) and the connected state (radio-connected) of the STA are introduced, so that the STA with no data or sporadic data enters an idle state when no data is sent, and the STA enters an idle state.
  • the STA configured to enter the idle state reduces the transmission of the management frame.
  • the STA When the STA is in the connected state, if the STA does not send or receive any data within the waiting time, the STA sends a connection release request to the AP, requesting to move from the connected state to the idle state. State.
  • Step 102 The STA receives a connection release response sent by the AP, transitions from the connection state to the idle state according to the connection release response, or the STA maintains the connection state according to the connection release response.
  • the AP After receiving the connection release request sent by the STA, the AP determines whether to allow the state to be transferred to the STA, and returns a connection release response to the STA. If the AP allows the STA to perform state transition, the STA transits from the connection state to the idle state according to the connection release response. If the AP does not allow the STA to perform state transition, the STA maintains the connection state according to the connection release response, thereby implementing management of the STA by the AP.
  • the STA After the STA transitions from the connected state to the idle state, if the STA determines that it has data transmission or reception, the STA sends a connection establishment request to the AP, requesting to transition from the idle state to the connected state. It should be noted that the STA is in this embodiment. In the idle state, the receiver and the transmitter are not turned off, and the STA can still send data, but the STA reduces the transmission of the management frame in the idle state, and the STA that has no data or sporadic data enters the idle state, for the idle state. The STA can reduce the frequency of management frame transmission.
  • a STA with a large amount of data to send sends a management frame every 10 seconds, it can configure the STA in idle state to send it for 20 seconds or 30 seconds or even longer.
  • Frames, for STAs without data or sporadic data reduce the transmission of management frames, and do not affect the transmission of normal data of such STAs, but reduce the transmission of such STA management frames, which can avoid such STAs and have a large amount of data to be sent.
  • the STA competes for the channel, which improves the MAC efficiency of the entire system.
  • the method provided in this embodiment introduces an idle state of the STA, so that a large number of STAs without data or sporadic data enter an idle state, and the STA that enters the idle state reduces the transmission of the management frame, and reduces the total number of management frames sent by such STAs.
  • the STA when the STA determines that it does not receive or transmit data within the waiting time, the STA may not send a connection release request to the AP, and the STA directly transfers from the connected state to the idle state, and After the transition to the idle state, the AP sends a state transition notification message to the AP to notify the AP to change from the connection state to the idle state, so that the AP can know the state of the STA and better manage the STA.
  • the AP does not need to STA hair Sending a connection release response reduces the signaling overhead of the AP, but this approach also has some drawbacks, because in some cases, the AP does not allow the STA to transition from the connected state to the idle state.
  • both of the modes are feasible, and the present invention is not limited thereto.
  • FIG. 5 is a flowchart of Embodiment 2 of a method for STA state transition in a WLAN system according to the present invention. As shown in FIG. 5, the method provided in this embodiment includes the following steps:
  • Step 201 When the STA is in the connected state, the STA determines that it has no data to receive or send within the waiting time, and sends a connection release request to the AP.
  • Step 202 The STA receives a connection release response sent by the AP, and moves from the connection state to the idle state according to the connection release response.
  • Step 203 The STA determines that it has data transmission or reception, and the STA sends a connection establishment request to the AP.
  • the STA determines that it has data reception, and has the following two methods:
  • the AP when the AP has data to send to the STA, the AP sends a first paging message to the STA, and the STA receives the first paging message sent by the AP, where the first paging message includes the identifier of the STA.
  • the STA finds that the first paging message includes its own identifier, and the STA determines that it has data to receive.
  • the AP also needs to broadcast and transmit its paging capability, paging interval, paging duration, etc., so that the STA receives at the corresponding time according to the paging capability, paging interval, and paging duration of the AP.
  • the first paging message sent by the AP when the AP has data to send to the STA, the AP sends a first paging message to the STA, and the STA receives the first paging message sent by the AP, where the first paging message includes the identifier of the STA.
  • the STA finds that the first
  • the AP may broadcast paging related information in a beacon frame or a probe response. Specifically, a paging capability field, a paging interval field, and a paging interval field may be added to the beacon frame or the probe response frame. Paging duration field.
  • the STA sends a second paging request message to the AP to check whether there is downlink data for itself. If yes, the AP replies with a second paging response with the STA ID to notify the STA. There is downlink data.
  • the STA receives the second paging response returned by the AP, and the second paging response includes the identifier of the STA. The STA finds that the second paging response includes its own identifier, and determines that it has data reception.
  • the STA determines that it has data transmission. Specifically, the STA determines whether there is data to be sent in its own transmission buffer, and if so, determines that it has data to send.
  • Step 204 The STA receives a connection establishment response sent by the AP, and transfers from the idle state to the connection state according to the connection establishment response.
  • the STA After the STA transitions from the connected state to the idle state, if the STA determines that it has data to send or receive, the STA sends a connection establishment request to the AP, requesting to transfer from the idle state to the connected state, where the STA has data.
  • the AP determines whether the STA is to be transferred from the idle state to the connected state.
  • the AP receives the connection establishment request sent by the STA, and then determines whether the data of the STA currently accessing the network is If the number of STAs accessing the network exceeds the threshold, the number of STAs accessing the network is already high. In this case, the AP can reject the STA from the idle state to the connected state, and the AP is in the STA.
  • the returned connection setup response indicates that the STA remains idle, thereby reducing the transmission of the STA management frame and preventing the STA from competing with other STAs for the channel.
  • the AP allows the STA to transition from the idle state to the connected state, and the AP instructs the STA to transition from the idle state to the connected state in the connection establishment response returned to the STA.
  • the AP can also determine whether to allow the STA to move from the idle state to other states through other conditions.
  • the STA receives the connection establishment response sent by the AP, and transfers from the idle state to the connection state according to the connection establishment response.
  • the AP does not allow the STA to transfer to the connection state, and the STA remains idle according to the connection state response.
  • the method provided in this embodiment enters the idle state of the STA, allows a large number of idle states to be entered, reduces the transmission of the management frame for the STA that enters the idle state, and notifies the STA by sending the paging by the AP and actively paging the STA.
  • the STA can normally send the necessary management frames, which can reduce the competition of the STAs of the STAs while reducing the transmission of such STA management frames, so as to improve the MAC efficiency of the WLAN system in dense deployment scenarios.
  • FIG. 6 is a flowchart of Embodiment 3 of a method for STA state transition in a WLAN system according to the present invention. As shown in FIG. 6, the method provided in this embodiment includes the following steps:
  • Step 301 The AP receives the connection release request sent by the STA, and the connection release request is that the STA sends to the AP when there is no data reception or transmission within the waiting time period when the STA is in the connection state.
  • Step 302 The AP determines whether to allow the STA to transition from the connected state to the idle state.
  • Step 303 The AP sends a connection release response to the STA, where the connection release response is used to instruct the STA to transition from the connected state to the idle state.
  • This step is performed if the AP determines that the STA is allowed to transition from the connected state to the idle state.
  • Step 304 The AP sends a connection release response to the STA, where the connection release response is used to indicate that the STA remains in the connected state.
  • the AP determines that the STA is not allowed to transition from the connected state to the idle state, perform this step. If the STA transits from the connected state to the idle state, if the STA sends data to the AP, the AP sends a connection establishment request to the AP, and the AP returns a connection establishment response to the STA according to the connection establishment request.
  • the connection establishment response is used to indicate that the STA is transferred from the idle state. Go to the connected state, or, instruct the STA to remain idle. After the STA transitions from the idle state to the connected state, the STA can perform normal data transmission and reception.
  • the method provided in this embodiment when the STA has no data transmission, requests the AP to transition from the connection state to the idle state, so that a large number of STAs without data or sporadic data enter an idle state, and reduce the transmission of the management frame for STAs entering the idle state.
  • the data sending STA occupies radio resources and improves the utilization of radio resources.
  • FIG. 7 is a signaling flow diagram of Embodiment 4 of a method for STA state transition in a WLAN system according to the present invention. As shown in FIG. 7, the method provided in this embodiment includes the following steps:
  • Step 401 The AP broadcasts its paging capability, paging interval, and paging duration.
  • the AP broadcasts its paging capability, paging interval, paging duration, etc., so that the STA receives the first paging message sent by the AP according to the paging capability, the paging interval, and the paging duration.
  • Step 402 The AP sends a first paging message to the STA.
  • the AP When the AP has data to send to the STA, the AP sends a first paging message to the STA to notify the STA that there is data to be received, and the first paging message includes the identifier of the STA.
  • the AP when the AP sends data to the STA, the AP sends a first paging message to the STA to notify the STA that downlink data is to be received.
  • Step 403 The STA receives the first paging message sent by the AP, and determines that the STA has downlink data reception according to the identifier of the STA included in the first paging message.
  • Step 404 The STA sends a connection establishment request to the AP, where the request is used to transfer from the idle state to the connection. Connected state.
  • Step 405 The AP receives a connection establishment request sent by the STA, and sends a connection establishment response to the STA according to the connection establishment request, where the connection establishment response is used to indicate that the STA transits from the idle state to the connection state, or indicates that the STA remains in the idle state.
  • the AP receives the connection establishment request sent by the STA, and determines whether the STA is allowed to transfer from the idle state to the connected state. For example, the AP receives the connection establishment request sent by the STA, and then determines whether the data of the STA currently accessing the network reaches the pre-preparation. If the number of STAs that the current network accesses exceeds the threshold, it indicates that there are many STAs accessing the network. In this case, the AP can reject the STA from the idle state to the connected state, and the AP returns to the STA.
  • the connection setup response indicates that the STA remains idle, thereby reducing the transmission of the STA management frame and preventing the STA from competing with other STAs for the channel.
  • the AP allows the STA to transition from the idle state to the connected state, and the AP instructs the STA to transition from the idle state to the connected state in the connection establishment response returned to the STA.
  • the AP can also determine whether to allow the STA to move from the idle state to other states through other conditions.
  • FIG. 8 is a signaling flowchart of Embodiment 5 of a STA state transition method in a WLAN system according to the present invention. As shown in FIG. 8, the method provided in this embodiment includes the following steps:
  • Step 501 The STA sends a second paging request message to the AP.
  • the STA actively sends a second paging request message to the AP to determine whether there is downlink data to be received for itself.
  • Step 502 The AP receives the second paging request message sent by the STA, and sends a second paging response to the STA, where the second paging response includes the identifier of the STA.
  • the AP If the AP has data to send, the AP returns a second paging response to the STA according to the second paging request message, and adds the identifier of the STA in the second paging request message.
  • Step 503 The STA receives the second paging response, and determines that it has downlink data reception according to the identifier of the STA included in the second paging response.
  • Step 504 The STA sends a connection establishment request to the AP, where the request is transferred from the idle state to the connected state.
  • Step 505 The AP receives a connection establishment request sent by the STA, and sends a connection establishment response to the STA according to the connection establishment request, where the connection establishment response is used to instruct the STA to transition from the idle state to the connection state, or the STA is instructed to remain in the idle state.
  • FIG. 9 is a schematic structural diagram of still another STA according to an embodiment of the present invention.
  • the STA 600 provided in this embodiment includes: a processor 61, a memory 62, a transmitter 63, a receiver 64, a memory 62, and a transmitting.
  • the processor 63 and the receiver 64 are respectively connected to the processor 61 via a bus.
  • the memory 62 stores execution instructions. When the STA 600 is running, the processor 61 communicates with the memory 62.
  • the processor 61 executes the instructions to cause the STA 600 to execute the WLAN system provided by the present invention.
  • Medium STA state transition method is used to instruct the STA to transition from the idle state to the connection state, or the
  • the processor 61 is configured to: when the STA is in a connected state, determine that the STA does not receive or send data during the waiting period;
  • the transmitter 63 is configured to send a connection release request to the access point AP after determining that the STA does not receive or transmit data within the waiting time period;
  • the receiver 64 is configured to receive a connection release response sent by the AP.
  • the processor 61 is further configured to: transfer the STA from the connected state to the idle state according to the connection release response, or maintain the connected state according to the connection release response.
  • the processor 61 After the processor 61 transfers the STA from the connected state to the idle state according to the connection release response, the processor 61 is further configured to: determine whether the STA has data transmission or reception; and the transmitter 63 is further configured to: if the STA has data transmission or reception, send a connection to the AP.
  • the receiver 64 is further configured to: receive a connection establishment response sent by the AP, and the processor 61 is further configured to transfer the STA from the idle state to the connection state according to the connection establishment response, or maintain the idle state according to the connection establishment response.
  • the AP sends a first paging message to the STA, and the receiver 64 receives the first paging message sent by the AP, first.
  • the paging message includes the identifier of the STA, where the first paging message is sent to the STA when the AP has data sent to the STA.
  • the processor 61 is specifically configured to: determine, according to the identifier of the STA included in the first paging message, that the STA has data. To receive. Alternatively, the STA may also send a second paging request message to the AP through the transmitter 63 to query whether there is data to be received.
  • the receiver 64 receives the second paging response returned by the AP, and the second paging response includes the identifier of the STA.
  • the processor 61 determines that the STA has data reception according to the identifier of the STA included in the second paging response.
  • the processor 61 determines whether the STA has data to be sent, specifically: determining data to be sent in the STA's transmission buffer, and determining that the STA has data to send.
  • the receiver 64 before receiving the first paging message sent by the AP, the receiver 64 is further configured to: receive the paging capability, the paging interval, and the paging duration sent by the AP, and according to the paging capability of the AP, The paging interval and the paging duration receive the first paging message sent by the AP.
  • the STA can normally send a management frame to the AP or receive the management frame sent by the AP.
  • the STAs provided in this embodiment may be used to implement the technical solutions shown in FIG. 4 and FIG. 5, and the specific implementation manners and technical effects are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of another AP according to an embodiment of the present invention.
  • the AP 700 provided in this embodiment includes: a processor 71, a memory 72, a transmitter 73, a receiver 74, a memory 72, and a transmitting.
  • the processor 73 and the receiver 74 are respectively connected to the processor 71 via a bus.
  • the memory 72 stores execution instructions.
  • the processor 71 communicates with the memory 72.
  • the processor 71 executes instructions to enable the AP 700 to execute the WLAN system provided by the present invention.
  • Medium STA state transition method is a Wi-Fi connection method.
  • the receiver 74 is configured to receive a connection release request sent by the STA, where the connection release request is determined by the STA to be sent to the AP when no data is received or sent within the waiting time period;
  • the processor 71 is configured to determine whether to allow the STA to transition from the connected state to the idle state.
  • the transmitter 73 is configured to return a connection release response to the STA according to the determination result of the processor 71, where the connection release response is used to instruct the STA to transfer from the connection state. Go to the idle state, or indicate that the STA remains connected.
  • the receiver 74 is further configured to: receive a connection establishment request sent by the STA, where the connection establishment request is sent to the AP when the STA determines that it has data transmission or reception; the processor 71 is further configured to: Determining whether to allow the STA to transition from the idle state to the connected state; the transmitter 73 is further configured to: if the STA is allowed to transition from the idle state to the connected state, send a connection establishment response to the STA to instruct the STA to transition from the idle state to the connected state, if not The STA is allowed to transition from the idle state to the connected state or the STA is sent to the STA to establish a connection establishment response indicating that the STA remains idle.
  • the transmitter 73 sends a first paging message to the STA to notify the STA that there is data to be received, and the first paging message includes the STA.
  • the receiver 74 receives the second paging request message sent by the STA, and if the AP has data to send to the STA, according to the second paging request message to the STA Returning a second paging response, where the second paging response includes the identity of the STA.
  • the transmitter 73 may send the first paging message to the STA according to a preset period.
  • the transmitter 73 sends a first homing message to the STA to notify the STA that there is data to be received, and is further configured to: broadcast its paging capability, paging interval, and paging duration, so that the STA according to the paging capability, The paging interval and the paging duration receive the first paging message sent by the AP.
  • the AP provided in this embodiment may be used to implement the technical solution provided by the method embodiment shown in FIG. 6.
  • the specific implementation manner and technical effects are similar, and details are not described herein again.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of cells is only a logical function division.
  • multiple units or components may be combined or integrated. Go to another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the 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 hardware plus software functional unit.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional unit described above is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform portions of the methods of various embodiments of the present invention.
  • Step. The foregoing storage medium includes: a U disk, a mobile 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 code. .
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiment; and the foregoing storage medium includes: a ROM, A variety of media that can store program code, such as RAM, disk, or optical disk.

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Abstract

本发明实施例提供一种WLAN系统中STA状态转移的方法和设备，包括：当STA处于连接状态时，所述STA确定自身在等待时长内没有数据接收或发送，则向AP发送连接释放请求；所述STA接收所述AP发送的连接释放响应，根据所述连接释放响应从连接状态转移到空闲状态，或者所述STA根据所述连接释放响应保持连接状态。所述方法中，引入STA的空闲状态，让大量无数据或偶发数据的STA进入空闲状态，对于进入空闲状态的STA减小管理帧的发送，降低这类STA发送大量管理帧对整个网络竞争冲突的影响，以提升密集部署场景下WLAN系统的MAC效率。而且减少无数据或偶发数据的STA管理帧的发送，能让有更多数据发送STA占用无线资源，提升无线资源利用率。

Description

WLAN系统中 STA状态转移的方法和设备 技术领域
本发明涉及数据通讯技术， 尤其涉及一种 WLAN系统中 STA状态转移 的方法和设备。 背景技术 随着移动互联网的发展和智能终端的普及， 数据流量呈现出爆发式的 增长趋势。 无线局域网 （Wireless Local Area Network, 简称 WLAN)在数 据传输速率和成本方面具备优势， 使其成为满足热点区域数据流量需求的 重要无线技术之一， WLAN在媒体访问控制（Media Access Control, 简称 MAC) MAC层采用基于竞争的载波帧听多路访问 /冲突避免（Carrier Sense Multiple Access /Collision Avoidance, 简称 CSMA/CA) 机制来接入信道， 其 MAC效率一直是 WLAN系统中被广泛关注的问题之一。
对 WLAN系统而言， 数据的发送是靠竞争信道来完成的， 当站点 ( STATION, 简称 STA) 无数据或有偶发数据时， 也会间歇性地发送一 些管理帧如探测请求 (probe request) 、 无线测量报告 ( radio measurement report) 等， 这些管理帧的发送同样需要竞争信道来完成。 尤其在密集部 署接入点 （Access Point, 简称 AP) 和 STA的场景下 （如体育馆、 机场 / 火车站等） ， 网络中会存在大量无数据或偶发数据的 STA, 由于无数据或 偶发数据的 STA在发送管理帧时也需要信道竞争， 会对有大数据需求的 STA的信道竞争造成影响， 引发大规模的节点间竞争冲突问题， 在降低了 网络整体的 MAC效率。
现有技术中， 为了节省无数据或偶发数据的 STA的能量， WLAN系统 定义了两种不同的节能模式： 流量指示图 （Traffic Indication Map, 简称 TIM) 和发送流量指示图 （Delivery Traffic Indication Map, 简称 DTIM) ， TIM和 DTIM信息在信标帧 （beacon) 中进行传输。 当 STA没有数据要发送 的时候， 进行节能状态， STA在节能状态下不发送任何数据， TIM技术中， 当 AP有数据要向 STA发送时， AP在 TIM信息中包含所需要通知的 STA ID, 通知处于节能状态的 STA有下行数据， STA听到 TIM中含有自己的 ID后， 发送 PS-Poll消息给 AP, 通知 AP其准备好了， 可以开始接收数据。 在 DTIM 技术中， AP广播需要可能下发的数据包， STA在 DTIM时刻醒来接收数据 包即可， 而不需发送 poll消息。 虽然， TIM/DTIM技术能降低无数据或偶发 数据 STA的发送大量管理帧， 但需要 STA进入节能状态， 在节能状态下所 有的管理帧都不能发送。 在实际的应用中， STA在节能状态下仍然有部分 管理帧需要发送， TIM/DTIM技术并不能完全适合对 MAC效率的提升需 求。 发明内容 本发明实施例提供一种 WLAN系统中 STA状态转移的方法和设备， 能 够减少管理帧的发送， 提高 MAC效率。
本发明第一方面提供一种站点 STA, 包括：
确定模块， 用于当所述 STA处于连接状态时， 确定所述 STA在等待时 长内没有数据接收或发送；
发送模块， 用于在所述确定模块确定所述 STA在等待时长内没有数据接 收或发送后， 向接入点 AP发送连接释放请求；
接收模块， 用于接收所述 AP发送的连接释放响应；
状态调整模块， 用于根据所述连接释放响应将所述 STA从连接状态转移 到空闲状态， 或者根据所述连接释放响应保持连接状态。
在本发明第一方面的第一种可能的实现方式中， 所述状态调整模块根据 所述连接释放响应将所述 STA从连接状态转移到空闲状态之后，
所述确定模块还用于： 确定所述 STA是否有数据发送或接收；
所述发送模块还用于： 如果所述 STA有数据发送或接收， 向所述 AP发 送连接建立请求；
所述接收模块还用于： 接收所述 AP发送的连接建立响应；
所述状态调整模块还用于： 根据所述连接建立响应将所述 STA从空闲状 态转移到连接状态， 或者， 根据所述连接建立响应保持空闲状态。
在本发明第一方面的第二种可能的实现方式中，所述确定模块具体用于： 接收所述 AP发送的第一寻呼消息， 所述第一寻呼消息中包含所述 STA 的标识， 所述第一寻呼消息为所述 AP有数据向所述 STA发送时向所述 STA 发送的；
根据所述第一寻呼消息中包含的所述 STA的标识确定所述 STA有数据 要接收。
在本发明第一方面的第三种可能的实现方式中，所述确定模块具体用于： 向所述 AP发送第二寻呼请求消息；
接收所述 AP返回的第二寻呼响应， 所述第二寻呼响应中包含所述 STA 的标识， 所述 STA根据所述第二寻呼响应中包含的所述 STA的标识确定所 述 STA有数据接收。
在本发明第一方面的第四种可能的实现方式中，所述确定模块具体用于： 确定发送缓存中有待发送的数据， 则确定所述 STA有数据要发送。
在本发明第一方面的第五种可能的实现方式中， 所述确定模块在接收所 述 AP发送的第一寻呼消息之前， 还用于：
接收所述 AP发送的寻呼能力、 寻呼间隔、 寻呼持续时间， 并根据所述 寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消息。
在本发明第一方面的第六种可能的实现方式中， 所述状态调整模块根据 所述连接建立响应将所述 STA从空闲状态转移到连接状态之后， 所述发送模 块还用于： 向所述 AP发送管理帧；
所述接收模块还用于： 接收所述 AP发送的管理帧。
本发明第二方面提供一种接入点 AP， 包括：
接收模块， 用于接收站点 STA发送的连接释放请求， 所述连接释放请求 为 STA在连接状态时确定自身在等待时长内没有数据接收或发送时向所述 AP发送的；
确定模块， 用于确定是否允许所述 STA从连接状态转移到空闲状态； 发送模块， 用于根据所述确定模块的确定结果， 向所述 STA返回连接释 放响应， 所述连接释放响应用于指示所述 STA从连接状态转移到空闲状态， 或者指示所述 STA保持连接状态。
在本发明第二方面的第一种可能的实现方式中， 若所述 STA从连接状态 转移到空闲状态， 所述接收模块还用于：
接收所述 STA发送的连接建立请求， 所述连接建立请求为所述 STA确 定自身有数据发送或接收时向所述 AP发送的；
所述确定模块还用于：确定是否允许所述 STA从空闲状态转移到连接状 态；
所述发送模块还用于： 根据所述确定模块的确定结果， 向所述 STA发送 连接建立响应， 所述连接建立响应用于指示所述 STA从空闲状态转移到连接 状态， 或者， 指示所述 STA保持空闲状态。
在本发明第二方面的第二种可能的实现方式中， 当所述 AP有数据向所 述 STA发送时， 所述发送模块还用于： 向所述 STA发送第一寻呼消息通知 所述 STA有数据要接收， 所述第一寻呼消息中包含所述 STA的标识。
在本发明第二方面的第三种可能的实现方式中， 所述接收模块还用于： 接收所述 STA发送的第二寻呼请求消息；
根据所述第二寻呼请求消息向所述 STA返回第二寻呼响应， 所述第二寻 呼响应中包含所述 STA的标识。
在本发明第二方面的第四种可能的实现方式中， 所述发送模块向所述 STA发送第一寻消息通知所述 STA有数据要接收之前， 还用于：
广播其寻呼能力， 寻呼间隔、 寻呼持续时间， 以使所述 STA根据所述寻 呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消息。
在本发明第二方面的第五种可能的实现方式中，所述发送模块具体用于: 按照预设的周期向所述 STA发送所述第一寻呼消息。
本发明第三方面提供一种 WLAN系统中 STA状态的转移方法， 包括： 当站点 STA处于连接状态时， 所述 STA确定自身在等待时长内没有数 据接收或发送， 则向接入点 AP发送连接释放请求；
所述 STA接收所述 AP发送的连接释放响应， 根据所述连接释放响应从 连接状态转移到空闲状态， 或者所述 STA根据所述连接释放响应保持连接状 态。
在本发明第三方面的第一种可能的实现方式中， 所述 STA接收所述 AP 发送的连接释放响应， 根据所述连接释放响应从连接状态转移到空闲状态之 后， 还包括：
所述 STA确定自身有数据发送或接收，则所述 STA向所述 AP发送连接 建立请求； 所述 STA接收所述 AP发送的连接建立响应， 根据所述连接建立响应从 空闲状态转移到连接状态， 或者， 所述 STA根据所述连接建立响应保持空闲 状态。
在本发明第三方面的第二种可能的实现方式中， 所述 STA确定自身有数 据接收， 包括：
所述 STA接收所述 AP发送的第一寻呼消息， 所述第一寻呼消息中包含 所述 STA的标识，所述第一寻呼消息为所述 AP有数据向所述 STA发送时向 所述 STA发送的；
所述 STA 根据所述第一寻呼消息中包含的所述 STA 的标识确定所述 STA有数据要接收。
在本发明第三方面的第三种可能的实现方式中， 所述 STA确定自身有数 据接收， 包括：
所述 STA向所述 AP发送第二寻呼请求消息；
所述 STA接收所述 AP返回的第二寻呼响应， 所述第二寻呼响应中包含 所述 STA的标识， 所述 STA根据所述第二寻呼响应中包含所述 STA的标识 确定自身有数据接收。
在本发明第三方面的第四种可能的实现方式中， 所述 STA确定自身有数 据发送， 包括：
所述 STA确定发送缓存中有待发送的数据， 则确定自身有数据要发送。 在本发明第三方面的第五种可能的实现方式中， 所述 STA在接收所述
AP发送的第一寻呼消息之前， 还包括：
所述 STA接收所述 AP发送的寻呼能力、 寻呼间隔、 寻呼持续时间， 并 根据所述寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼 消息。
在本发明第三方面的第六种可能的实现方式中， 所述 STA接收所述 AP 发送的连接建立响应， 根据所述连接建立响应从空闲状态转移到连接状态之 后， 还包括：
所述 STA向所述 AP发送管理帧， 或者， 所述 STA接收所述 AP发送的 管理帧。
本发明第四方面提供一种 WLAN系统中 STA状态转移的方法， 包括： 接入点 AP接收站点 STA发送的连接释放请求，所述连接释放请求为 STA 在连接状态时确定自身在等待时长内没有数据接收或发送时向所述 AP发送 的；
所述 AP确定是否允许所述 STA从连接状态转移到空闲状态；
若是， 所述 AP向所述 STA发送连接释放响应， 所述连接释放响应用于 指示所述 STA从连接状态转移到空闲状态；
若否， 所述 AP向所述 STA发送连接释放响应， 所述连接释放响应用于 指示所述 STA保持连接状态。
在本发明第四方面的第一种可能的实现方式中， 若所述 STA从连接状态 转移到空闲状态， 则所述 AP向所述 STA返回连接释放响应之后， 还包括： 所述 AP接收所述 STA发送的连接建立请求， 所述连接建立请求为所述 STA确定自身有数据发送或接收时向所述 AP发送的；
所述 AP根据所述连接建立请求， 向所述 STA发送连接建立响应， 所述 连接建立响应用于指示所述 STA从空闲状态转移到连接状态， 或者， 指示所 述 STA保持空闲状态。
在本发明第四方面的第二种可能的实现方式中， 还包括：
当所述 AP有数据向所述 STA发送时， 所述 AP向所述 STA发送第一寻 呼消息通知所述 STA有数据要接收， 所述第一寻呼消息中包含所述 STA的 标识。
在本发明第四方面的第三种可能的实现方式中， 还包括：
所述 AP接收所述 STA发送的第二寻呼请求消息；
所述 AP根据所述第二寻呼请求消息向所述所述 STA返回第二寻呼响应， 所述第二寻呼响应中包含所述 STA的标识。
在本发明第四方面的第四种可能的实现方式中， 所述 AP向所述 STA发 送第一寻消息通知所述 STA有数据要接收之前， 还包括：
所述 AP广播其寻呼能力， 寻呼间隔、 寻呼持续时间， 以使所述 STA根 据所述寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消 息。
在本发明第四方面的第六种可能的实现方式中， 所述 AP向所述 STA发 送第一寻呼消息通知所述 STA有数据要接收， 包括： 所述 AP按照预设的周期向所述 STA发送第一寻呼消息通知所述 STA有 数据要接收。
本发明实施例提供的 WLAN系统中 STA状态转移的方法和设备， 引入 STA的空闲状态和连接状态，让大量无数据或偶发数据的 STA进入空闲状态， 对于进入空闲状态的 STA减小管理帧的发送， 降低这类 STA发送大量管理 帧时对整个网络竞争冲突的影响，以提升密集部署场景下 WLAN系统的 MAC 效率， 而且减少无数据或偶发数据的 STA管理帧的发送， 能让其他有更多 数据发送 STA占用无线资源， 提升无线资源利用率。 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一简单地介绍， 显而易见 地， 下面描述中的附图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为本发明实施例提供的一种 STA的结构示意图；
图 2为本发明实施例提供的另一种 STA的结构示意图；
图 3为本发明实施例提供的一种 AP的结构示意图；
图 4为本发明 WLAN系统中 STA状态转移的方法实施例一的流程图； 图 5为本发明 WLAN系统中 STA状态转移的方法实施例二的流程图； 图 6为本发明 WLAN系统中 STA状态转移的方法实施例三的流程图； 图 7为本发明 WLAN系统中 STA状态转移的方法实施例四的信令流程 图；
图 8为本发明 WLAN系统中 STA状态转移的方法实施例五的信令流程 图；
图 9为本发明实施例提供的又一种 STA的结构示意图；
图 10为本发明实施例提供的另一种 AP的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 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。
图 1为本发明实施例提供的一种 STA的结构示意图， 如图 1所示， 本实 施例提供的 STA包括： 确定模块 11、 发送模块 12、 接收模块 13、 状态调整 模块 14。
其中， 确定模块 11， 用于当 STA处于连接状态时， 确定 STA在等待时 长内没有数据接收或发送。
本发明各实施例中， 引入了 STA的空闲状态 （radio— IDLE) 和连接状态
(radio— connected) ， 让无数据或偶发数据的 STA在没数据发送的时候进入 空闲状态， 在 STA进入空闲状态后， 配置进入空闲状态的 STA减小管理帧 的发送。 当 STA处于连接状态时， 确定模块 11判断 STA在等待时长内有没 有数据发送或接收。
发送模块 12， 用于在确定模块 11确定 STA在等待时长内没有数据接收 或发送后， 向接入点 AP发送连接释放请求。
如果确定模块 11判断出 STA在等待时长内没有任何数据发送或接收， 则发送模块 12向 AP发送连接释放请求， 请求从连接状态转移到空闲状态。
接收模块 13， 用于接收 AP发送的连接释放响应。
状态调整模块 14，用于根据连接释放响应将 STA从连接状态转移到空闲 状态， 或者根据连接释放响应保持连接状态。
AP接收到 STA发送的连接释放请求后， 确定是否允许对 STA进行状态 转移， 并向 STA返回连接释放响应， 如果 AP允许 STA进行状态转移， 则状 态调整模块 14根据连接释放响应从连接状态转移到空闲状态， 如果 AP不允 许 STA进行状态转移， 则状态调整模块 14根据连接释放响应保持连接状态， 从而实现了 AP对 STA的管理。
需要说明的是， 本实施例中 STA在空闲状态下并没有关闭接收机和发射 机， STA仍然能够发送数据， 只是 STA在空闲状态下减少了管理帧的发送， 对于没有数据或偶发数据的 STA才会进入空闲状态，对于空闲状态下的 STA 可减少管理帧发送的频率， 如有大量数据要发送的 STA每 10秒发送一次管 理帧， 则对于空闲状态下的 STA, 可配置其 20秒或 30秒甚至更长的时间才 发送一次管理帧， 对于没有数据或偶发数据的 STA减少管理帧的发送， 并不 会影响这类 STA正常数据的发送， 但减少这类 STA管理帧的发送， 能够避 免这类 STA和有大量数据要发送的 STA竞争信道， 提高了整个系统的 MAC 效率。
本实施例提供的 STA, 引入 STA的空闲状态和连接状态， 让大量无数据 或偶发数据的 STA进入空闲状态， 对于进入空闲状态的 STA减小管理帧的 发送， 降低这类 STA发送大量管理帧时对整个网络竞争冲突的影响， 以提升 密集部署场景下 WLAN系统的 MAC效率， 而且减少无数据或偶发数据的 STA管理帧的发送， 能让其他有更多数据发送 STA 占用无线资源， 提升 无线资源利用率。
图 2为本发明实施例提供的另一种 STA的结构示意图， 如图 2所示， 本 实施例提供的 STA包括： 确定模块 21、 发送模块 22、 接收模块 23、 状态调 整模块 24。
其中， 确定模块 21， 用于当 STA处于连接状态时， 确定 STA在等待时 长内没有数据接收或发送；
发送模块 22， 用于在确定模块 21确定 STA在等待时长内没有数据接收 或发送后， 向接入点 AP发送连接释放请求；
接收模块 23， 用于接收 AP发送的连接释放响应；
状态调整模块 24，用于根据连接释放响应将 STA从连接状态转移到空闲 状态， 或者根据连接释放响应保持连接状态。
当 STA从连接状态转移到空闲状态之后，确定模块 21还用于：确定 STA 是否有数据发送或接收， 如果 STA有数据发送或接收， 发送模块 22 向 AP 发送连接建立请求， 请求从空闲状态转移到连接状态， AP根据连接建立请求 向 STA返回连接建立响应，接收模块 23接收 AP发送的连接建立响应，状态 调整模块 24根据连接建立响应将 STA从空闲状态转移到连接状态， 或者， 根据连接建立响应保持空闲状态。
确定模块 21具体通过以下两种方式确定 STA有数据要接收：
第一种方式， 当 AP有数据要向 STA发送时， AP主动向 STA发送第一 寻呼消息 （paging) ， 确定模块 21接收 AP发送的第一寻呼消息， 第一寻呼 消息中包含 STA的标识， 确定模块 21根据第一寻呼消息中包含的 STA的标 识确定 STA有数据要接收。在这种方式中， AP还需要广播发送其寻呼能力、 寻呼间隔、 寻呼持续时间等， 以使确定模块 21根据 AP的寻呼能力、 寻呼间 隔、 寻呼持续时间， 在对应的时间接收 AP发送的第一寻呼消息。 AP可以在 信标帧 （Beacon) 或探测响应帧 （Probe response) 中广播寻呼相关信息， 具 体的， 可在信标帧或探测响应帧的中新增寻呼能力字段、 寻呼间隔字段和寻 呼持续时间字段。
第二种方式， STA主动向 AP发送第二寻呼请求消息， 查询是否有针对 自己的下行数据，若有，则 AP回复带有该 STA ID的第二寻呼响应（paging response ) ， 通知 STA有下行数据。 确定模块 21接收 AP返回的第二寻呼 响应， 第二寻呼响应中包含 STA的标识， 确定模块 21发现第二寻呼响应中 包含 STA的标识， 则确定 STA有数据接收。
本实施例中， 确定模块 21确定 STA有数据发送， 具体为， 确定 STA的 发送缓存中是否有待发送的数据， 若有， 则确定 STA有数据要发送。
本实施例中， 状态调整模块 24将 STA从空闲状态转移到连接状态之后， 发送模块 22还用于： 向 AP发送管理帧； 接收模块 23还用于： 接收 AP发送 的管理帧。
本实施例中， 当 STA由连接状态转移到空闲状态之后，如果确定模块 24 确定出 STA有数据要发送或者接收， 发送模块 22向 AP发送连接建立请求， 请求从空闲状态转移到连接状态， 这里 STA有数据要发送包括 STA有管理 帧要发送。 AP接收到 STA发送的连接建立请求后， 确定是否要将 STA由空 闲状态转移到连接状态， 举例来说， AP接收到 STA发送的连接建立请求， 然后， 判断当前接入网络的 STA的数据是否达到预设的阈值， 如果当前网络 接入的 STA的数量超过了阈值， 说明网络中接入的 STA数据已经很多， 此 时， AP可以拒绝 STA由空闲状态转移到连接状态， 则 AP在向 STA返回的 连接建立响应中指示 STA保持空闲状态， 从而减少该 STA管理帧的发送， 避免该 STA与其他 STA竞争信道。 如果当前网络接入的 STA的数量小于阈 值， 则 AP允许 STA从空闲状态转移到连接状态， 则 AP在向 STA返回的连 接建立响应中指示 STA从空闲状态转移到连接状态。 当然， AP还可以通过 其他条件判断是否允许 STA从空闲状态转移到其他状态。 本实施例提供的 STA, 引入 STA的空闲状态， 让无数据发送或偶发数据 要发送的 STA进入空闲状态， 对于进入空闲状态的 STA减小管理帧的发送， 并且通过 AP发送寻呼和 STA主动进行寻呼的方式通知 STA有下行数据，使 得 STA能够正常发送必须的管理帧， 在不影响降低这类 STA管理帧的发送 的同时能够降低整个网络竞争冲突响， 以提升密集部署场景下 WLAN系统的 MAC效率。
图 3为本发明实施例提供的一种 AP的结构示意图， 如图 3所示， 本实 施例提供的 AP包括： 接收模块 31、 确定模块 32、 发送模块 33。
其中， 接收模块 31， 用于接收站点 STA发送的连接释放请求， 连接释放 请求为 STA在连接状态时确定自身在等待时长内没有数据接收或发送时向 AP发送的。
当 STA处于连接状态时， 如果 STA在等待时长内没有任何数据发送或 接收， 则 STA向 AP发送连接释放请求， 请求从连接状态转移到空闲状态， 接收模块 31接收 STA发送的连接释放请求。
确定模块 32， 用于确定是否允许 STA从连接状态转移到空闲状态； 发送模块 33， 用于根据确定模块 32的确定结果， 向 STA返回连接释放 响应，连接释放响应用于指示 STA从连接状态转移到空闲状态，或者指示 STA 保持连接状态。
接收模块 31接收到 STA发送的连接释放请求后， 确定模块 32确定是否 允许对 STA进行状态转移，举例来说，确定模块 32判断当前接入网络的 STA 的数据是否达到预设的阈值， 如果当前网络接入的 STA的数量超过了阈值， 说明网络中接入的 STA数据已经很多， 此时， AP可以拒绝 STA由空闲状态 转移到连接状态，则 AP在向 STA返回的连接建立响应中指示 STA保持空闲 状态， 从而减少该 STA管理帧的发送， 避免该 STA与其他 STA竞争信道。 如果当前网络接入的 STA的数量小于阈值，则 AP允许 STA从空闲状态转移 到连接状态，则 AP在向 STA返回的连接建立响应中指示 STA从空闲状态转 移到连接状态。 当然， 确定模块 32还可以通过其他条件判断是否允许 STA 从空闲状态转移到其他状态。
具体的判断方法可以参照图 2所示实施例的描述， 如果允许 STA从连接 状态转移到空闲状态，则发送模块 33在向 STA返回连接释放响应中指示 STA 从连接状态转移到空闲状态， 如果不允许 STA从连接状态转移到空闲状态， 则发送模块 33在向 STA返回连接释放响应中指示 STA保持连接状态。
在 STA从连接状态转移到空闲状态后， 接收模块 31还接收 STA发送的 连接建立请求， 该连接建立请求为 STA确定自身有数据发送或接收时向 AP 发送的。 确定模块 32还用于： 确定是否允许 STA从空闲状态转移到连接状 态； 如果允许 STA从空闲状态转移到连接状态， 则发送模块 33在向 STA发 送连接建立响应中指示 STA从空闲状态转移到连接状态， 如果不允许 STA 从空闲状态转移到连接状态， 则发送模块 33在向 STA发送连接建立响应中 指示 STA保持空闲状态。
本实施例中， 当 AP有数据向 STA发送时， 发送模块 33还用于： 向 STA 发送第一寻呼消息通知 STA有数据要接收， 第一寻呼消息中包含 STA的标 识。 STA接收到第一寻呼消息后， 根据第一寻呼消息中包含 STA的标识确定 自身有数据要接收，则在相应的时间接收 AP发送的数据。发送模块 33向 STA 发送第一寻消息通知 STA有数据要接收之前， 还用于： 广播其寻呼能力， 寻 呼间隔、 寻呼持续时间， 以使 STA根据寻呼能力、 寻呼间隔、 寻呼持续时间 接收 AP发送的第一寻呼消息。 发送模块 33可以按照预设的周期， 周期性的 向 STA发送第一寻呼消息。
本实施例中， 当 STA可以主动向 AP发送第二寻呼请求消息， 查询是否 有针对自己的下行数据， 接收模块 31接收 STA发送的第二寻呼请求消息； 如果 AP有数据要向 STA发送， 则向 STA回复带有该 STA 标识的第二寻 呼响应。
图 4为本发明 WLAN系统中 STA状态转移的方法实施例一的流程图， 如图 4所示， 本实施例提供的方法包括以下歩骤：
歩骤 101、 当 STA处于连接状态时， STA确定自身在等待时长内没有数 据接收或发送， 则向 AP发送连接释放请求。
本发明各实施例中， 引入了 STA的空闲状态 （radio— IDLE) 和连接状态 (radio— connected) ， 让无数据或偶发数据的 STA在没数据发送的时候进入 空闲状态， 在 STA进入空闲状态后， 配置进入空闲状态的 STA减小管理帧 的发送。 当 STA处于连接状态时， 如果 STA在等待时长内没有任何数据发 送或接收， 则 STA向 AP发送连接释放请求， 请求从连接状态转移到空闲状 态。
歩骤 102、 STA接收 AP发送的连接释放响应，根据连接释放响应从连接 状态转移到空闲状态， 或者 STA根据连接释放响应保持连接状态。
AP接收到 STA发送的连接释放请求后， 确定是否允许对 STA进行状态 转移， 并向 STA返回连接释放响应， 如果 AP允许 STA进行状态转移， 则 STA根据连接释放响应从连接状态转移到空闲状态， 如果 AP不允许 STA进 行状态转移，则 STA根据连接释放响应保持连接状态，从而实现了 AP对 STA 的管理。
当 STA从连接状态转移到空闲状态之后， 如果 STA确定自身有数据发 送或接收， 则 STA向 AP发送连接建立请求， 请求从空闲状态转移到连接状 态， 需要说明的是， 本实施例中 STA在空闲状态下并没有关闭接收机和发射 机， STA仍然能够发送数据， 只是 STA在空闲状态下减少了管理帧的发送， 对于没有数据或偶发数据的 STA才会进入空闲状态，对于空闲状态下的 STA 可减少管理帧发送的频率， 如有大量数据要发送的 STA每 10秒发送一次管 理帧， 则对于空闲状态下的 STA, 可配置其 20秒或 30秒甚至更长的时间才 发送一次管理帧， 对于没有数据或偶发数据的 STA减少管理帧的发送， 并不 会影响这类 STA正常数据的发送， 但减少这类 STA管理帧的发送， 能够避 免这类 STA和有大量数据要发送的 STA竞争信道， 提高了整个系统的 MAC 效率。
本实施例提供的方法， 引入 STA的空闲状态， 让大量无数据或偶发数据 的 STA进入空闲状态， 对于进入空闲状态的 STA减小管理帧的发送， 降低 这类 STA发送大量管理帧时对整个网络竞争冲突的影响， 以提升密集部署场 景下 WLAN系统的 MAC效率，而且减少无数据或偶发数据的 STA管理帧 的发送， 能让其他有更多数据发送 STA 占用无线资源， 提升无线资源利 用率。
需要说明的是， 在本发明可行的实现方式中， 当 STA确定自身在等待时 长内没有数据接收或发送， STA可以不向 AP发送连接释放请求， STA直接 从连接状态转移到空闲状态， 并在转移到空闲状态后向 AP发送一个状态转 移通知消息， 通知 AP 自己从连接状态转移到空闲状态， 使得 AP能够知道 STA的状态， 更好的实现对 STA的管理， 这种方式中， AP无需向 STA发 送连接释放响应， 减少了 AP的信令的开销， 但是这种方式也会有一些弊端， 因为在有些情况下， AP不允许 STA从连接状态转移到空闲状态。 在本发明 各实施例中， 这两种方式都是可行的， 本发明并不对此进行限制。
图 5为本发明 WLAN系统中 STA状态转移的方法实施例二的流程图， 如图 5所示， 本实施例提供的方法包括以下歩骤：
歩骤 201、 当 STA处于连接状态时， STA确定自身在等待时长内没有数 据接收或发送， 则向 AP发送连接释放请求。
歩骤 202、 STA接收 AP发送的连接释放响应，根据连接释放响应从连接 状态转移到空闲状态。
歩骤 203、 STA确定自身有数据发送或接收， 则 STA向 AP发送连接建 立请求。
本实施例中， STA确定自身有数据接收， 有以下两种方式：
第一种方式， 当 AP有数据要向 STA发送时， AP主动向 STA发送第一 寻呼消息（paging) ， STA接收 AP发送的第一寻呼消息， 第一寻呼消息中包 含 STA的标识； STA收到第一寻呼消息后， 发现第一寻呼消息中包含自身的 标识， 则 STA确定自身有数据要接收。 在这种方式中， AP还需要广播发送 其寻呼能力、 寻呼间隔、 寻呼持续时间等， 以使 STA根据 AP的寻呼能力、 寻呼间隔、 寻呼持续时间， 在对应的时间接收 AP发送的第一寻呼消息。 AP 可以在信标帧 (Beacon) 或探测响应帧 （Probe response) 中广播寻呼相关信 息， 具体的， 可在信标帧或探测响应帧的中新增寻呼能力字段、 寻呼间隔字 段和寻呼持续时间字段。
第二种方式， STA主动向 AP发送第二寻呼请求消息， 查询是否有针对 自己的下行数据，若有，则 AP回复带有该 STA ID的第二寻呼响应（paging response) ， 通知 STA有下行数据。 STA接收 AP返回的第二寻呼响应， 第 二寻呼响应中包含 STA的标识， STA发现第二寻呼响应中包含自身的标识， 则确定自身有数据接收。
本实施例中， STA确定自身有数据发送， 具体为， STA确定自身的发送 缓存中是否有待发送的数据， 若有， 则确定自身有数据要发送。
歩骤 204、 STA接收 AP发送的连接建立响应，根据连接建立响应从空闲 状态转移到连接状态。 本实施例中， 当 STA由连接状态转移到空闲状态之后， 如果 STA确定 出自己有数据要发送或者接收， 则 STA向 AP发送连接建立请求， 请求从空 闲状态转移到连接状态， 这里 STA有数据要发送包括 STA有管理帧要发送。 AP接收到 STA发送的连接建立请求后， 确定是否要将 STA由空闲状态转移 到连接状态， 举例来说， AP接收到 STA发送的连接建立请求， 然后， 判断 当前接入网络的 STA的数据是否达到预设的阈值，如果当前网络接入的 STA 的数量超过了阈值， 说明网络中接入的 STA数据已经很多， 此时， AP可以 拒绝 STA由空闲状态转移到连接状态，则 AP在向 STA返回的连接建立响应 中指示 STA保持空闲状态， 从而减少该 STA管理帧的发送， 避免该 STA与 其他 STA竞争信道。如果当前网络接入的 STA的数量小于阈值， 则 AP允许 STA从空闲状态转移到连接状态， 则 AP在向 STA返回的连接建立响应中指 示 STA从空闲状态转移到连接状态。 当然， AP还可以通过其他条件判断是 否允许 STA从空闲状态转移到其他状态。
STA接收 AP发送的连接建立响应， 根据连接建立响应从空闲状态转移 到连接状态，当然，有些情况下 AP不允许 STA转移到连接状态的话，则 STA 根据连接状态响应保持空闲状态。
本实施例提供的方法， 弓 1入 STA的空闲状态， 让大量进入空闲状态， 对 于进入空闲状态的 STA减小管理帧的发送，并且通过 AP发送寻呼和 STA主 动进行寻呼的方式通知 STA有下行数据， 使得 STA能够正常发送必须的管 理帧， 在不影响降低这类 STA管理帧的发送的同时能够降低整个网络竞争冲 突响， 以提升密集部署场景下 WLAN系统的 MAC效率。
图 6为本发明 WLAN系统中 STA状态转移的方法实施例三的流程图， 如图 6所示， 本实施例提供的方法包括以下歩骤：
歩骤 301、 AP接收 STA发送的连接释放请求， 连接释放请求为 STA在 连接状态时确定自身在等待时长内没有数据接收或发送时向 AP发送的。
本实施例中， 当 STA处于连接状态时， 如果 STA在等待时长内没有任 何数据发送或接收， 则 STA向 AP发送连接释放请求， 请求从连接状态转移 到空闲状态， AP接收 STA发送的连接释放请求。
歩骤 302、 AP确定是否允许 STA从连接状态转移到空闲状态。
若是， 执行歩骤 303， 若否， 执行歩骤 304。 歩骤 303、 AP向 STA发送连接释放响应， 连接释放响应用于指示 STA 从连接状态转移到空闲状态。
若 AP确定允许 STA从连接状态转移到空闲状态， 则执行本歩骤。
歩骤 304、 AP向 STA发送连接释放响应， 连接释放响应用于指示 STA 保持连接状态。
如果 AP确定不允许 STA从连接状态转移到空闲状态， 执行本歩骤。 若 STA从连接状态转移到空闲状态， 如果 STA有数据发送或接收时， 向 AP发送连接建立请求， AP根据连接建立请求， 向 STA返回连接建立响应 该连接建立响应用于指示 STA从空闲状态转移到连接状态， 或者， 指示 STA 保持空闲状态。 当 STA从空闲状态转移到连接状态后， STA可以进行正常的 数据收发。
本实施例提供的方法， 当 STA没有数据发送时， 向 AP请求从连接状态 转移到空闲状态， 让大量无数据或偶发数据的 STA进入空闲状态， 对于进入 空闲状态的 STA减小管理帧的发送， 降低这类 STA发送大量管理帧时对整 个网络竞争冲突的影响， 以提升密集部署场景下 WLAN系统的 MAC效率， 而且减少无数据或偶发数据的 STA 管理帧的发送， 能让其他有更多数据 发送 STA占用无线资源， 提升无线资源利用率。
图 7为本发明 WLAN系统中 STA状态转移的方法实施例四的信令流程 图， 如图 7所示， 本实施例提供的方法包括以下歩骤：
歩骤 401、 AP广播其寻呼能力， 寻呼间隔、 寻呼持续时间。
AP广播其寻呼能力， 寻呼间隔、 寻呼持续时间等， 以使 STA根据寻呼 能力、 寻呼间隔、 寻呼持续时间接收 AP发送的第一寻呼消息。
歩骤 402、 AP向 STA发送第一寻呼消息。
当 AP有数据向 STA发送时， AP向 STA发送第一寻呼消息通知 STA有 数据要接收， 第一寻呼消息中包含 STA的标识。
这种方式中， 当 AP有数据向 STA发送时， AP主动向 STA发送第一寻 呼消息， 通知 STA有下行数据要接收。
歩骤 403、 STA接收 AP发送的第一寻呼消息，根据第一寻呼消息中包含 STA的标识， 确定自身有下行数据接收。
歩骤 404、 STA向 AP发送连接建立请求，用于请求从空闲状态转移到连 接状态。
歩骤 405、 AP接收 STA发送的连接建立请求， 根据连接建立请求， 向 STA发送连接建立响应，连接建立响应用于指示 STA从空闲状态转移到连接 状态， 或者， 指示 STA保持空闲状态。
AP接收 STA发送的连接建立请求， 确定是否允许 STA从空闲状态转移 到连接状态， A举例来说， AP接收到 STA发送的连接建立请求， 然后， 判 断当前接入网络的 STA 的数据是否达到预设的阈值， 如果当前网络接入的 STA的数量超过了阈值， 说明网络中接入的 STA数据已经很多， 此时， AP 可以拒绝 STA由空闲状态转移到连接状态，则 AP在向 STA返回的连接建立 响应中指示 STA保持空闲状态，从而减少该 STA管理帧的发送，避免该 STA 与其他 STA竞争信道。如果当前网络接入的 STA的数量小于阈值， 则 AP允 许 STA从空闲状态转移到连接状态，则 AP在向 STA返回的连接建立响应中 指示 STA从空闲状态转移到连接状态。 当然， AP还可以通过其他条件判断 是否允许 STA从空闲状态转移到其他状态。
图 8为本发明 WLAN系统中 STA状态转移方法实施例五的信令流程图， 如图 8所示， 本实施例提供的方法包括以下歩骤：
歩骤 501、 STA向 AP发送第二寻呼请求消息。
本实施例中， STA主动向 AP发送第二寻呼请求消息， 确定是否有针对 自己的下行数据要接收。
歩骤 502、 AP接收 STA发送的第二寻呼请求消息， 并向 STA发送的第 二寻呼响应， 第二寻呼响应中包含 STA的标识。
如果 AP有数据要发送， 则 AP根据第二寻呼请求消息向 STA返回第二 寻呼响应， 并在第二寻呼请求消息中添加 STA的标识。
歩骤 503、 STA接收第二寻呼响应， 根据第二寻呼响应中包含的 STA的 标识， 确定自身有下行数据接收。
歩骤 504、 STA向 AP发送连接建立请求，用于请求从空闲状态转移到连 接状态。
歩骤 505、 AP接收 STA发送的连接建立请求， 并根据连接建立请求， 向 STA发送连接建立响应，连接建立响应用于指示 STA从空闲状态转移到连接 状态， 或者， 指示 STA保持空闲状态。 图 9为本发明实施例提供的又一种 STA的结构示意图， 如图 9所示， 本 实施例提供的 STA600包括： 处理器 61、 存储器 62、 发射器 63、 接收器 64， 存储器 62、 发射器 63、 接收器 64分别通过总线与处理器 61连接， 存储器 62存储执行指令， 当 STA600运行时， 处理器 61与存储器 62之间通信， 处理器 61执行指令使得 STA600执行本发明提供的 WLAN系统中 STA状 态转移方法。
处理器 61， 用于当 STA处于连接状态时， 确定 STA在等待时长内没有 数据接收或发送；
发射器 63，用于在确定 STA在等待时长内没有数据接收或发送后， 向接 入点 AP发送连接释放请求；
接收器 64， 用于接收 AP发送的连接释放响应；
处理器 61还用于： 根据连接释放响应将 STA从连接状态转移到空闲状 态， 或者根据连接释放响应保持连接状态。
处理器 61根据连接释放响应将 STA从连接状态转移到空闲状态之后， 还用于： 确定 STA是否有数据发送或接收； 发射器 63还用于： 如果 STA有 数据发送或接收， 向 AP发送连接建立请求； 接收器 64还用于： 接收 AP发 送的连接建立响应， 处理器 61还用于根据连接建立响应将 STA从空闲状态 转移到连接状态， 或者， 根据连接建立响应保持空闲状态。
本实施例中， 当 STA从连接状态状态转移到空闲状态后， 如果 STA有 数据要接收， AP会向 STA发送第一寻呼消息， 接收器 64接收 AP发送的第 一寻呼消息， 第一寻呼消息中包含 STA的标识， 第一寻呼消息为 AP有数据 向 STA发送时向 STA发送的； 处理器 61具体用于： 根据第一寻呼消息中包 含的 STA的标识确定 STA有数据要接收。 或者， STA也可以通过发射器 63 向 AP发送第二寻呼请求消息， 询问是否有数据要接收； 接收器 64接收 AP 返回的第二寻呼响应， 第二寻呼响应中包含 STA的标识， 处理器 61根据第 二寻呼响应中包含 STA的标识确定 STA有数据接收。
本实施例中， 处理器 61确定 STA是否有数据要发送具体为： 确定 STA 的发送缓存中有待发送的数据， 则确定 STA有数据要发送。
本实施例中， 接收器 64在接收 AP发送的第一寻呼消息之前， 还用于： 接收 AP发送的寻呼能力、寻呼间隔、寻呼持续时间，并根据 AP的寻呼能力、 寻呼间隔、 寻呼持续时间接收 AP发送的第一寻呼消息。
本实施例中， 处理器 61根据连接建立响应将 STA从空闲状态转移到连 接状态之后， STA就可以正常的向 AP发送管理帧，或者接收 AP发送的管理 帧。
本实施例提供的 STA, 可用于执行图 4和图 5所示的技术方案， 具体实 现方式和技术效果类似， 这里不再赘述。
图 10为本发明实施例提供的另一种 AP的结构示意图， 如图 10所示， 本实施例提供的 AP700包括： 处理器 71、存储器 72、发射器 73、接收器 74， 存储器 72、 发射器 73、 接收器 74分别通过总线与处理器 71连接， 存储器 72存储执行指令， 当 AP700运行时， 处理器 71与存储器 72之间通信， 处理器 71执行指令使得 AP700执行本发明提供的 WLAN系统中 STA状态 转移方法。
接收器 74， 用于接收站点 STA发送的连接释放请求， 连接释放请求为 STA在连接状态时确定自身在等待时长内没有数据接收或发送时向 AP发送 的；
处理器 71， 用于确定是否允许 STA从连接状态转移到空闲状态； 发射器 73，用于根据处理器 71的确定结果， 向 STA返回连接释放响应， 连接释放响应用于指示 STA从连接状态转移到空闲状态， 或者指示 STA保 持连接状态。
若 STA从连接状态转移到空闲状态， 接收器 74还用于： 接收 STA发送 的连接建立请求， 连接建立请求为 STA确定自身有数据发送或接收时向 AP 发送的； 处理器 71还用于： 确定是否允许 STA从空闲状态转移到连接状态； 发射器 73还用于： 如果允许 STA从空闲状态转移到连接状态， 则向 STA发 送连接建立响应中指示 STA从空闲状态转移到连接状态， 如果不允许 STA 从空闲状态转移到连接状态或者， 则向 STA发送连接建立响应中指示 STA 保持空闲状态。
本实施例中， 当 STA从连接状态转移到空闲状态后， 如果 AP有数据向 STA发送， 发射器 73向 STA发送第一寻呼消息通知 STA有数据要接收， 第 一寻呼消息中包含 STA的标识。 或者， 接收器 74接收 STA发送的第二寻呼 请求消息， 如果 AP有数据要向 STA发送， 则根据第二寻呼请求消息向 STA 返回第二寻呼响应， 第二寻呼响应中包含 STA的标识。 其中， 发射器 73可 以按照预设的周期向 STA发送第一寻呼消息。
本实施例中， 发射器 73向 STA发送第一寻消息通知 STA有数据要接收 之前， 还用于： 广播其寻呼能力， 寻呼间隔、 寻呼持续时间， 以使 STA根据 寻呼能力、 寻呼间隔、 寻呼持续时间接收 AP发送的第一寻呼消息。
本实施例提供的 AP, 可用于执行图 6所示方法实施例提供的技术方案， 具体实现方式和技术效果类似， 这里不再赘述。
在本发明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， 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系 统， 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。
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或者也可以不是物理单元， 即可以位于一个地方， 或者也可以分布到多个网络单元上。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， 也可以采用硬 件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元， 可以存储在一个计算 机可读取存储介质中。 上述软件功能单元存储在一个存储介质中， 包括若 干指令用以使得一台计算机设备 （可以是个人计算机， 服务器， 或者网络 设备等） 或处理器 （processor) 执行本发明各个实施例方法的部分歩骤。 而前述的存储介质包括： U盘、移动硬盘、只读存储器（Read-Only Memory, ROM) 、 随机存取存储器 （Random Access Memory, RAM) 、 磁碟或者 光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分歩骤 可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机可读 取存储介质中， 该程序在执行时， 执行包括上述方法实施例的歩骤； 而前述 的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介 质。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种站点 STA, 其特征在于， 包括：
确定模块， 用于当所述 STA处于连接状态时， 确定所述 STA在等待时 长内没有数据接收或发送；
发送模块， 用于在所述确定模块确定所述 STA在等待时长内没有数据接 收或发送后， 向接入点 AP发送连接释放请求；
接收模块， 用于接收所述 AP发送的连接释放响应；
状态调整模块， 用于根据所述连接释放响应将所述 STA从连接状态转移 到空闲状态， 或者根据所述连接释放响应保持连接状态。
2、根据权利要求 1所述的 STA, 其特征在于， 所述状态调整模块根据所 述连接释放响应将所述 STA从连接状态转移到空闲状态之后，
所述确定模块还用于： 确定所述 STA是否有数据发送或接收；
所述发送模块还用于： 如果所述 STA有数据发送或接收， 向所述 AP发 送连接建立请求；
所述接收模块还用于： 接收所述 AP发送的连接建立响应；
所述状态调整模块还用于： 根据所述连接建立响应将所述 STA从空闲状 态转移到连接状态， 或者， 根据所述连接建立响应保持空闲状态。
3、 根据权利要求 2所述的 STA, 其特征在于， 所述确定模块具体用于： 接收所述 AP发送的第一寻呼消息， 所述第一寻呼消息中包含所述 STA 的标识， 所述第一寻呼消息为所述 AP有数据向所述 STA发送时向所述 STA 发送的；
根据所述第一寻呼消息中包含的所述 STA的标识确定所述 STA有数据 要接收。
4、 根据权利要求 2所述的 STA, 其特征在于， 所述确定模块具体用于： 向所述 AP发送第二寻呼请求消息；
接收所述 AP返回的第二寻呼响应， 所述第二寻呼响应中包含所述 STA 的标识， 所述 STA根据所述第二寻呼响应中包含的所述 STA的标识确定所 述 STA有数据接收。
5、 根据权利要求 2所述的 STA, 其特征在于， 所述确定模块具体用于： 确定发送缓存中有待发送的数据， 则确定所述 STA有数据要发送。
6、根据权利要求 3所述的 STA, 其特征在于， 所述确定模块在接收所述 AP发送的第一寻呼消息之前， 还用于：
接收所述 AP发送的寻呼能力、 寻呼间隔、 寻呼持续时间， 并根据所述 寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消息。
7、根据权利要求 2所述的 STA, 其特征在于， 所述状态调整模块根据所 述连接建立响应将所述 STA从空闲状态转移到连接状态之后， 所述发送模块 还用于： 向所述 AP发送管理帧；
所述接收模块还用于： 接收所述 AP发送的管理帧。
8、 一种接入点 AP, 其特征在于， 包括：
接收模块， 用于接收站点 STA发送的连接释放请求， 所述连接释放请求 为 STA在连接状态时确定自身在等待时长内没有数据接收或发送时向所述 AP发送的；
确定模块， 用于确定是否允许所述 STA从连接状态转移到空闲状态； 发送模块， 用于根据所述确定模块的确定结果， 向所述 STA返回连接释 放响应， 所述连接释放响应用于指示所述 STA从连接状态转移到空闲状态， 或者指示所述 STA保持连接状态。
9、 根据权利要求 8所述的 AP， 其特征在于， 若所述 STA从连接状态转 移到空闲状态， 所述接收模块还用于：
接收所述 STA发送的连接建立请求， 所述连接建立请求为所述 STA确 定自身有数据发送或接收时向所述 AP发送的；
所述确定模块还用于：确定是否允许所述 STA从空闲状态转移到连接状 态；
所述发送模块还用于： 根据所述确定模块的确定结果， 向所述 STA发送 连接建立响应， 所述连接建立响应用于指示所述 STA从空闲状态转移到连接 状态， 或者， 指示所述 STA保持空闲状态。
10、 根据权利要求 8所述的 AP， 其特征在于， 当所述 AP有数据向所述 STA发送时， 所述发送模块还用于： 向所述 STA发送第一寻呼消息通知所述 STA有数据要接收， 所述第一寻呼消息中包含所述 STA的标识。
11、 根据权利要求 8所述的 AP， 其特征在于， 所述接收模块还用于： 接收所述 STA发送的第二寻呼请求消息； 根据所述第二寻呼请求消息向所述 STA返回第二寻呼响应， 所述第二寻 呼响应中包含所述 STA的标识。
12、根据权利要求 10所述的 AP,其特征在于，所述发送模块向所述 STA 发送第一寻消息通知所述 STA有数据要接收之前， 还用于：
广播其寻呼能力， 寻呼间隔、 寻呼持续时间， 以使所述 STA根据所述寻 呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消息。
13、 根据权利要求 10所述的 AP， 其特征在于， 所述发送模块具体用于： 按照预设的周期向所述 STA发送所述第一寻呼消息。
14、 一种 WLAN系统中 STA状态转移的方法， 其特征在于， 包括： 当站点 STA处于连接状态时， 所述 STA确定自身在等待时长内没有数 据接收或发送， 则向接入点 AP发送连接释放请求；
所述 STA接收所述 AP发送的连接释放响应， 根据所述连接释放响应从 连接状态转移到空闲状态， 或者所述 STA根据所述连接释放响应保持连接状 态。
15、 根据权利要求 14所述的方法， 其特征在于， 所述 STA接收所述 AP 发送的连接释放响应， 根据所述连接释放响应从连接状态转移到空闲状态之 后， 还包括：
所述 STA确定自身有数据发送或接收，则所述 STA向所述 AP发送连接 建立请求；
所述 STA接收所述 AP发送的连接建立响应， 根据所述连接建立响应从 空闲状态转移到连接状态， 或者， 所述 STA根据所述连接建立响应保持空闲 状态。
16、 根据权利要求 15所述的方法， 其特征在于， 所述 STA确定自身有 数据接收， 包括：
所述 STA接收所述 AP发送的第一寻呼消息， 所述第一寻呼消息中包含 所述 STA的标识，所述第一寻呼消息为所述 AP有数据向所述 STA发送时向 所述 STA发送的；
所述 STA 根据所述第一寻呼消息中包含的所述 STA 的标识确定所述 STA有数据要接收。
17、 根据权利要求 15所述的方法， 其特征在于， 所述 STA确定自身有 数据接收， 包括：
所述 STA向所述 AP发送第二寻呼请求消息；
所述 STA接收所述 AP返回的第二寻呼响应， 所述第二寻呼响应中包含 所述 STA的标识， 所述 STA根据所述第二寻呼响应中包含的所述 STA的标 识确定所述 STA有数据接收。
18、 根据权利要求 15所述的方法， 其特征在于， 所述 STA确定自身有 数据发送， 包括：
所述 STA确定发送缓存中有待发送的数据， 则确定自身有数据要发送。
19、 根据权利要求 16所述的方法， 其特征在于， 所述 STA在接收所述 AP发送的第一寻呼消息之前， 还包括：
所述 STA接收所述 AP发送的寻呼能力、 寻呼间隔、 寻呼持续时间， 并 根据所述寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼 消息。
20、 根据权利要求 15所述的方法， 其特征在于， 所述 STA接收所述 AP 发送的连接建立响应， 根据所述连接建立响应从空闲状态转移到连接状态之 后， 还包括：
所述 STA向所述 AP发送管理帧， 或者， 所述 STA接收所述 AP发送的 管理帧。
21、 一种 WLAN系统中 STA状态转移的方法， 其特征在于， 包括： 接入点 AP接收站点 STA发送的连接释放请求，所述连接释放请求为 STA 在连接状态时确定自身在等待时长内没有数据接收或发送时向所述 AP发送 的；
所述 AP确定是否允许所述 STA从连接状态转移到空闲状态；
若是， 所述 AP向所述 STA发送连接释放响应， 所述连接释放响应用于 指示所述 STA从连接状态转移到空闲状态；
若否， 所述 AP向所述 STA发送连接释放响应， 所述连接释放响应用于 指示所述 STA保持连接状态。
22、 根据权利要求 21所述的方法， 其特征在于， 若所述 STA从连接状 态转移到空闲状态，则所述 AP向所述 STA返回连接释放响应之后，还包括： 所述 AP接收所述 STA发送的连接建立请求， 所述连接建立请求为所述 STA确定自身有数据发送或接收时向所述 AP发送的；
所述 AP根据所述连接建立请求， 向所述 STA发送连接建立响应， 所述 连接建立响应用于指示所述 STA从空闲状态转移到连接状态， 或者， 指示所 述 STA保持空闲状态。
23、 根据权利要求 21所述的方法， 其特征在于， 还包括：
当所述 AP有数据向所述 STA发送时， 所述 AP向所述 STA发送第一寻 呼消息通知所述 STA有数据要接收， 所述第一寻呼消息中包含所述 STA的 标识。
24、 根据权利要求 21所述的方法， 其特征在于， 还包括：
所述 AP接收所述 STA发送的第二寻呼请求消息；
所述 AP根据所述第二寻呼请求消息向所述所述 STA返回第二寻呼响应， 所述第二寻呼响应中包含所述 STA的标识。
25、根据权利要求 23所述的方法， 其特征在于， 所述 AP向所述 STA发 送第一寻消息通知所述 STA有数据要接收之前， 还包括：
所述 AP广播其寻呼能力， 寻呼间隔、 寻呼持续时间， 以使所述 STA根 据所述寻呼能力、 寻呼间隔、 寻呼持续时间接收所述 AP发送的第一寻呼消 息。
26、根据权利要求 23所述的方法， 其特征在于， 所述 AP向所述 STA发 送第一寻呼消息通知所述 STA有数据要接收， 包括：
所述 AP 按照预设的周期向所述 STA发送所述第一寻呼消息通知所述
STA有数据要接收。
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