WO2013063942A1 - 无线局域网的接入方法、站点和接入点 - Google Patents

无线局域网的接入方法、站点和接入点 Download PDF

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Publication number
WO2013063942A1
WO2013063942A1 PCT/CN2012/077501 CN2012077501W WO2013063942A1 WO 2013063942 A1 WO2013063942 A1 WO 2013063942A1 CN 2012077501 W CN2012077501 W CN 2012077501W WO 2013063942 A1 WO2013063942 A1 WO 2013063942A1
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Prior art keywords
configuration
information
access point
version information
configuration version
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PCT/CN2012/077501
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English (en)
French (fr)
Inventor
姚宗明
巴贝尔⋅菲利普
王学寰
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12845447.7A priority Critical patent/EP2750452B1/en
Priority to JP2014537459A priority patent/JP6086392B2/ja
Publication of WO2013063942A1 publication Critical patent/WO2013063942A1/zh
Priority to US13/911,390 priority patent/US10172074B2/en
Priority to US16/213,565 priority patent/US10779226B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • 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
    • H04W48/14Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • 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
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • 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]

Definitions

  • TECHNICAL FIELD Embodiments of the present invention relate to the field of wireless communications, and more particularly, to an access method, a station, and an access point of a wireless local area network.
  • BACKGROUND OF THE INVENTION IEEE (Institute of Electrical and Electronics Engineers) 802. l lu is a supplemental standard for IEEE 802.11. The main content of the IEEE 802.
  • the external network is an external network with subscription or other features, such as a STA that can obtain a subscription service provided by a subscription service provider network (SSPN).
  • SSPN subscription service provider network
  • An interworking element is added to the IEEE 802.l lu standard as a carrier for AP (Access Point, Access Point) and STA interoperability and information to implement interoperability between the WLAN infrastructure network and the external network. behavior.
  • the IEEE 802. l lu standard also adds a Roaming Consortium information element to indicate the identification information of the relevant subscription service provider (SSP).
  • SSP subscription service provider
  • the AP will transmit this element. Quickly initiate certification of security credentials. Specifically, the AP sends a beacon frame and a probe response including an interworking element and a roaming alliance information element to assist the STA in network selection.
  • the STA supports the GAS (Generic Advertisement Services) protocol. GAS can cause STAs to make network choices. Regardless of whether the STA is in an associated or unassociated state, GAS can provide a transport mechanism for the advertisement service to implement network discovery and selection functions.
  • the query requesting STA and the query response AP implement the GAS query through the interaction frame. Specifically, in the synchronous query state, the query requesting STA first sends a GAS initial request frame to the query response AP, and requests it to feed back the expected query information; after receiving the request, the query response AP uploads the query request information to the advertisement server.
  • the query response AP feeds back the query information to the query request with a single GAS initial response frame or one or more GAS recovery response frames as a carrier.
  • STA which carrier is used depends on the size of the query information. If the length of the query information is too long, it will be fragmented. After receiving the GAS initial response frame, the query requesting STA can continue to send the GAS recovery request frame to obtain subsequent fragments.
  • the query requesting STA In the asynchronous query state, the query requesting STA first sends a GAS initial request frame to the query response AP, and requests it to feed back the expected query information; after receiving the request, the query response AP uploads the query request information to the notification server to request feedback thereof. Query information; the query response AP then sends a GAS initial response frame that does not contain the query information to the query requesting STA and tells it to take the query information after a period of time; the notification server feeds back the corresponding query information; after the time specified by the AP, the query request The STA requests the AP to return the query information by using the recovery request frame.
  • the last query response AP feeds the feedback query information to the query request STA by using a single GAS recovery response frame or one or more GAS recovery response frames as a carrier. Which carrier is used depends on the size of the query information. If the length of the query information is too long, the query request STA can continue to send the GAS recovery request frame to obtain subsequent fragments after receiving the GAS recovery response frame.
  • an STA obtains the external network information supported by the API through the GAS query process and successfully associates with the API, it is for some reason (for example, because the STA is brought to the range covered by the AP2). Internally and associated with communication on the new AP2 or the STA actively switches to communication on the non-WLAN network without leaving the API coverage) The STA disconnects from the API, after a period of time for some reason ( For example, if the STA is brought back to the range covered by the API or the STA actively switches back to the WLAN network without the API coverage of the UE, if it needs to re-associate with the API, the STA needs to re-acquire the API through the GAS query process. The supported external network information is thus associated with the API again.
  • the embodiments of the present invention provide a method, a site, and an access point for a wireless local area network, which can solve the problem of reduced access efficiency caused by repeated GAS query processes.
  • a method for accessing a wireless local area network including: receiving, by a station, a beacon frame or a detection response frame from an access point, where the beacon frame or the detection response frame carries configuration version information; the station according to the beacon frame Or perform a GAS query by detecting the configuration version information carried in the response frame.
  • a method for accessing a wireless local area network including: the access point sends a beacon frame or a detection response frame to the station, and the beacon frame or the detection response frame carries configuration version information, so that the site according to the letter The GAS query is performed on the configuration version information carried by the frame or the detection response frame.
  • a station including: a receiving unit, configured to receive a beacon frame or a detection response frame from an access point, where the beacon frame or the detection response frame carries configuration version information;
  • the GAS query is performed according to the configuration version information carried by the beacon frame or the detection response frame.
  • an access point including: a generating unit, configured to generate a beacon frame or a detection response frame, where the beacon frame or the detection response frame carries configuration version information; and a sending unit, configured to send to the station Generating a beacon frame or a detection response frame generated by the generating unit, so that the station performs a GAS query according to the configuration version information carried by the beacon frame or the detection response frame.
  • the access point in the embodiment of the present invention sends the configuration version information to the site, so that the site performs the GAS query according to the configuration version information, thereby improving the access efficiency.
  • FIG. 1 is a flow chart of a method for accessing a wireless local area network according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of a method for accessing a wireless local area network according to another embodiment of the present invention.
  • 3A to 3F are schematic diagrams showing an example of configuration version information according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of an initial access procedure in accordance with an embodiment of the present invention.
  • FIG. 5 is a flowchart of an initial access procedure according to another embodiment of the present invention.
  • FIG. 6 is a flow chart of an initial access procedure of another embodiment of the present invention.
  • FIG. 7 is a flow chart of an initial access procedure of another embodiment of the present invention.
  • Figure 8 is a flow diagram of the process of re-accessing in accordance with the embodiment of Figures 4-7.
  • FIG. 9 is a flow chart of an initial access procedure according to another embodiment of the present invention.
  • Figure 10 is a flow diagram of the process of re-accessing in accordance with the embodiment of Figure 9.
  • FIG 11 is a block diagram of a station in accordance with one embodiment of the present invention.
  • Figure 12 is a block diagram of a station in accordance with another embodiment of the present invention.
  • Figure 13 is a block diagram of an access point in accordance with one embodiment of the present invention.
  • the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of them. Example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
  • 1 is a flow chart of a method for accessing a wireless local area network according to an embodiment of the present invention. The method of Figure 1 is performed by a site. 101.
  • the station receives a beacon frame or a detection response frame from the access point, where the beacon frame or the detection response frame carries configuration version information.
  • the station performs a GAS query according to the configuration version information carried by the beacon frame or the detection response frame.
  • the GAS query is not performed.
  • the station determines the configuration version information carried in the beacon frame or the detection response frame and the configuration version information included in the associated record saved by the site. Is it consistent?
  • the foregoing association record may be pre-stored.
  • the site may maintain an association record for the access point, including the configuration version information of the access point and the GAS query information of the access point obtained from the advertisement server during the previous GAS query process. For example, if the configuration version information carried in the beacon frame or the detection response frame is consistent with the configuration version information included in the association record, the site does not perform the GAS query, but creates an association request directly according to the association record. And send an association request to the access point.
  • the GAS query information included in the above association record can be used when creating an association request.
  • the site may also perform the GAS query when the configuration version information carried in the beacon frame or the detection response frame is consistent with the configuration version information included in the associated record, and the direct use has been performed. Saved GAS query information.
  • the embodiment of the present invention does not limit the time for saving the associated record.
  • an association record can be created and saved after the GAS query information is obtained.
  • the station may save the record for the access point after successfully associating to the access point.
  • the GAS query information of the access point obtained from the advertisement server during the GAS query process is similar to that in the prior art, and therefore will not be described in detail.
  • the GAS query information may include a roaming alliance list, that is, the remaining 01 (Organizational Identifier) that is not included in the roaming alliance information element in the beacon; or the GAS query information may include a NAI (Network Access Identifier, network) Access identifier) list of domains.
  • the list can indicate that the hotspot can accept security certificates for these realms, where these areas are for hotspot operators or their roaming partners.
  • the list also provides supported EAP (Extensible Authentication Protocol) types.
  • the association record may further include configuration information on the access point.
  • the configuration information on the access point may include wireless local area network parameters, vendor specific parameters, or other parameters (such as related parameters for security authentication).
  • the WLAN parameters configured on the access point may be parameters related to a specific protocol (such as 802. l lu), such as information carried by the interworking element and the roaming alliance information element.
  • the vendor specific parameter configured on the access point may be information carried by a Vendor Specific Information information element (which may be located in a beacon frame or a detection response frame).
  • the configuration version information may include a configuration change counter for indicating configuration information on the access point and/or a change status of the configuration information on the advertisement server, or used to indicate the foregoing access.
  • the site may add or update the association record according to the updated GAS query information when acquiring the updated GAS query information (for example, in the process of re-association or in another GAS query process).
  • the access point in the embodiment of the present invention sends the configuration version information to the site, so that the site performs the GAS query according to the configuration version information, and does not need to repeatedly perform the GAS query every time, thereby reducing the unnecessary GAS query process and improving the access efficiency.
  • the beacon frame or the detection response frame may carry the identification information of the access point, and the association record may also include the identification information of the access point. It should be noted that the specific form of the foregoing identification information is not limited in the embodiment of the present invention.
  • an access point's MAC (Media Access Control) address can be used as its identification information.
  • MAC address can be Identify each access point in one place.
  • the GAS query information of the same AP saved before can be used to improve the access efficiency.
  • the SSID can identify the set of services in which the access point is located. There is generally a certain association between multiple APs (such as APIs and AP2s) within a group (for example, a service set), for example, belonging to the same carrier, possibly using the same associated information / GAS query information.
  • the GAS query information of the access point API saved by the STA can also be used when it is associated with the AP2, instead of performing GAS query through the AP2, which can further improve the access efficiency.
  • other forms of identification information such as identification information indicating the domain in which the access point is located, may also be used. Multiple APs may use the same associated information within the same region.
  • the association record of the embodiment of the present invention may include the GAS query information acquired from the advertisement server when initially associated with the access point, but the embodiment of the present invention is not limited thereto.
  • the association record may also include GAS query information, such as cross-network roaming information, etc., obtained from the advertisement server after the association is successful (either initial association or subsequent/re-association).
  • FIG. 2 is a flow chart of a method for accessing a wireless local area network according to another embodiment of the present invention. The method of Figure 2 is performed by an access point.
  • the access point sends a beacon frame or a detection response frame to the station, where the beacon frame or the detection response frame carries the configuration version information, so that the station performs the GAS query according to the configuration version information carried by the beacon frame or the detection response frame.
  • the configuration version information may include a configuration change counter for indicating configuration information on the access point and/or a change status of the configuration information on the advertisement server.
  • the above configuration version The information may include a configuration version string for indicating configuration information on the access point and/or a version of the configuration information on the advertisement server. The definition of the configuration information is as described above, and thus the description will not be repeated.
  • the access point in the embodiment of the present invention sends the configuration version information to the site, so that the site performs the GAS query according to the configuration version information, and does not need to repeatedly perform the GAS query every time, thereby reducing the unnecessary GAS query process and improving the access efficiency.
  • the configuration version information is used to indicate a change or a version of the configuration of the access point and/or the advertisement server.
  • the embodiment of the present invention does not limit the form of the configuration version information.
  • the configuration change counter may perform a corresponding counting operation for the configuration information on the access point and/or the change of the configuration information on the advertisement server.
  • the configuration version string may record the corresponding version string for the configuration information on the access point and/or the version of the configuration information on the advertisement server.
  • the structure of the configuration version information will be described below with reference to specific examples. However, the examples are only intended to help those skilled in the art to better understand the embodiments of the invention, and not to limit the scope of the invention.
  • 3A to 3F are schematic diagrams showing an example of configuration version information according to an embodiment of the present invention. Normally, the configuration information on the AP and the configuration information maintained on the advertisement server are not changed frequently once configured, which makes it possible to reuse the information obtained through the GAS query process by the STA.
  • the concept of version indication can be introduced to record the configuration information configured on the AP and/or the change of the configuration information maintained on the advertisement server.
  • a configuration change counter (Configuration Change Counter) as shown in FIG. 3A may be defined to record configuration information on the AP and/or to notify the change of configuration information on the server.
  • the configuration change counter may be incremented by one each time each of the above configuration information is changed once.
  • the element ID may be any integer value (for example, but not limited to 241, etc.) of 0 to 255 that is not used by the 802.11 protocol, and the length ( Length ) represents the number of bytes corresponding to the configuration change counter (for example, but not limited to 1, 2, 4, 8, etc.).
  • the configuration change counter of FIG. 3A may also record only the change of one of the above two types of configuration information.
  • FIG. 3B is an example of another configuration change counter. In the example of FIG. 3B, the change of the two types of configuration information is counted separately. Specifically, as shown in the figure, the element ID (Element ID) may be 0 to 255.
  • the configuration change counter includes two counters, that is, a counter 1 for configuration information on the AP and a counter 2 for the configuration information on the advertisement server, and records the changes of the above two configurations. It should be noted that although an example in which the two configurations respectively correspond to two counters is shown in FIG. 3B, the embodiment of the present invention is not limited thereto.
  • the configuration change counter can be targeted to only one of two configurations, and the corresponding number of counters can be reduced to one.
  • FIG. 3C is an example of another configuration change counter. In the example of FIG.
  • the change of the two types of configuration information is also counted separately, but two elements are used, that is, the element identification number 1 for the configuration information on the AP.
  • the element identification number 2 for notifying the configuration information on the server, respectively records the changes of the above two configurations.
  • the two element identification numbers can be two different integer values from 0 to 255 that are not yet defined by the 802.11 protocol, and the length (Length) represents the corresponding counter (counter 1 and counter 2). The number of bytes. It should be noted that although an example in which the two configurations respectively correspond to two elements is shown in FIG. 3C, the embodiment of the present invention is not limited thereto.
  • the configuration change counter can be targeted to only one of two configurations, and the number of corresponding elements can be reduced to one.
  • Figure 3D shows an example of the structure of the configuration version string.
  • the element ID (Element ID) may be any integer value from 0 to 255 that is not yet defined by the 802.11 protocol (for example, but not limited to 242, etc.), and the length (Length) represents the word corresponding to the configuration version string. Section number.
  • FIG. 3E is an example of another configuration version string.
  • the element ID (Element ID) may be any integer value from 0 to 255 that has not been defined by the 802.11 protocol, and the length (Length) represents the byte corresponding to the configuration version string. number.
  • the configuration version string includes two counters, that is, a string 1 for configuration information on the AP and a string 2 for configuration information on the advertisement server, and the versions of the above two configurations are separately recorded.
  • FIG. 3E is an example of another configuration version string.
  • the two configuration information are also respectively used, but two elements are used, that is, the element identification number 1 for the configuration information on the AP and the notification.
  • the element identification number 2 of the configuration information on the server records the versions of the above two configurations.
  • the two element IDs can be (two different integer values in 255 that are not yet defined by the 802.11 protocol, and the length (Length) represents the corresponding string (string 1 and string 2). Corresponding number of bytes. It should be noted that although an example in which the two configurations respectively correspond to two elements is shown in FIG. 3F, the embodiment of the present invention is not limited thereto.
  • the configuration version string may be only for one of the two configurations. The number of corresponding elements can be reduced to one.
  • the configuration change counter (or configuration version string) is maintained by the administrator of the AP and the advertisement server. When the administrator changes the configuration information on the AP and/or the notification server When maintaining configuration information, you must also update the configuration change counter (or configuration version string) to distinguish it from the previous configuration.
  • the STA initiates a scanning mechanism, and discovers the AP by passive scanning (beacon frame in step 401) or active scanning (the detection request frame in step 402 and the detection response frame in step 403), and acquires, for example, mutual Information such as an operation element, a roaming alliance information element, configuration version information (such as the configuration change counter shown in FIGS. 3A-3C or the configuration version string shown in FIGS. 3D-3F).
  • mutual Information such as an operation element, a roaming alliance information element, configuration version information (such as the configuration change counter shown in FIGS. 3A-3C or the configuration version string shown in FIGS. 3D-3F).
  • the beacon frame of step 401 or the detection response frame of step 403 may carry the interworking element, the roaming alliance information element, and the configuration version information. 404.
  • the STA detects that there is no record that the AP is successfully associated with the local device, and if the GAS query condition is met, the GAS query mechanism is started, and the GAS initial query frame is sent to the AP, where the query frame includes information such as the session identifier and the query request.
  • the content that satisfies the conditions for performing the GAS query here can be as follows:
  • the STA cannot identify the identification information of the SSP or SSP group represented by all the 01s carried in the roaming union information element, so that additional 01 information needs to be queried through the GAS.
  • the STA can identify the identification information of the SSP (Subscription Service Provider) or the SSP group represented by all the 01s carried in the roaming alliance information element, but the interworking element (Interworking element)
  • the ASA Additional Step Required for Access
  • the STA needs to pass the GAS. Query the relevant Network Authentication Type information to perform the next related action.
  • the STA needs to query other external network information supported by the AP.
  • the GAS query condition is not met, for example, the interworking element/roaming alliance information element in the beacon frame or the detection response frame after the configuration change carries the 01 information that the STA can recognize and the STA can pass the beacon frame or the Detector. If the RSN cell in the response frame obtains the relevant authentication information, the GAS query is not needed, and steps 404-407 are skipped.
  • the AP parses the GAS initial query frame, and sends the query request included in the frame to the advertisement server.
  • the advertisement server processes the query request, and returns a corresponding query response to the AP.
  • the AP returns, to the STA, a GAS initial query response frame corresponding to the GAS initial query frame, where the response frame includes a session identifier carried by the initial request frame, and a delayed query time (in the example of FIG. 4, the delayed query time is set to 0. ) and query response information.
  • the STA obtains the GAS query information of the AP by querying the response information. If the STA decides to associate with the AP, the STA's complete the STA and the AP through the association request gKre-association request frame (step 421) and the association response or re-association response frame (step 422). Associated action. It should be noted that steps 421 and 422 are merely illustrative. Referring to the corresponding processes in the prior art, the associated actions of embodiments of the present invention may include more relevant steps.
  • the association record may include but is not limited to: AP identification information, wireless LAN parameters configured on the AP (such as 802. l lu related parameters, vendor specific parameters, etc.) Etc., GAS query information of the AP obtained from the advertisement server in the GAS query process 404-407.
  • the associated record may take the form of a record table, each item of the record table including the above.
  • the embodiment of Figure 4 is a process of using a synchronous GAS query, and the query response information does not need to be fragmented.
  • FIG. 5 is a flowchart of an initial access procedure according to another embodiment of the present invention.
  • Figure 5 also uses the synchronous GAS query process, but the query response message needs to be sent in fragments.
  • STA represents a site and AP represents an access point.
  • both STA and AP can support the 802. l lu protocol.
  • FIG. 5 the same steps as those in FIG. 4 are given the same reference numerals, and thus the duplicated description will be appropriately omitted.
  • the difference between Figure 5 and Figure 4 is mainly:
  • the delayed query time in 407 is not 0. 408-409, the query response message is too long, and the STA needs to request the GAS initial response, and after the delayed query time in the foregoing step 407, the STA sends the fragment transmission to the AP one or more times through the GAS recovery request in step 408.
  • the session ID can be carried in the GAS recovery request.
  • the STA then receives the GAS recovery response returned by the AP (step 409), and the GAS recovery response carries the corresponding session identifier and partial query response message until the query response message is transmitted.
  • the embodiments of the present invention are also applicable to the process of asynchronous GAS query.
  • Figure 6 is a flow diagram of an initial access procedure in accordance with another embodiment of the present invention.
  • Figure 6 uses the asynchronous GAS query process, and the query response message does not need to be sent in fragments.
  • STA represents a site and AP represents an access point.
  • both STA and AP can support the 802. l lu protocol.
  • FIG. 6 the same steps as those in FIG. 4 use the same reference numerals, and thus the duplicated description will be appropriately omitted.
  • the difference between Figure 6 and Figure 4 is mainly:
  • the STA starts the GAS query mechanism, and sends a GAS initial query frame to the AP, where the query frame includes information such as a session identifier and a query request.
  • the AP parses the GAS initial query frame, and sends the query request included in the frame to the advertisement server.
  • the AP sends a GAS initial response frame to the STA, and tells the STA to query the information after delaying the query time.
  • the notification server processes the query request, and returns a corresponding query response to the AP;
  • FIG. 7 is a flow chart of an initial access procedure of another embodiment of the present invention.
  • Figure 7 uses the asynchronous GAS query process, but the query response message needs to be sent in fragments.
  • STA represents a site and AP represents an access point.
  • both STA and AP can support the 802. l lu protocol.
  • FIG. 7 the same steps as those in FIG.
  • FIG. 7 and FIG. 6 are given the same reference numerals, and thus the duplicated description will be appropriately omitted.
  • the difference between FIG. 7 and FIG. 6 is mainly: one or more steps 412-413 are performed until the inquiry response message is transmitted.
  • the STA obtains the GAS query information of the AP by querying the response information.
  • Figure 8 is a flow diagram of the process of re-accessing in accordance with the embodiment of Figures 4-7.
  • STA represents a station and AP represents an access point.
  • both STA and AP can support the 802. l lu protocol. 501-503, similar to 401-403 of Fig. 4, and therefore the description will not be repeated.
  • the STA detects that the AP has a related record that is successfully associated with the AP. For example, the identifier of the AP is consistent with the identifier information in the associated record, and the configuration version information carried in the beacon frame or the detection response frame is associated with the associated record. If the configuration version information of the AP is consistent, the previously saved GAS query information will be obtained locally. On the other hand, if the configuration version information carried in the beacon frame or the detection response frame is inconsistent with the configuration version information corresponding to the AP in the associated record, the GAS query process may be required to obtain the GAS query from the advertisement server. information. Alternatively, the required information can be obtained by other means, such as from a modified beacon frame or a detection response frame.
  • the association action between the STA and the AP is completed by associating the request frame/association response frame.
  • STA represents a site and AP represents an access point.
  • AP represents an access point.
  • both STA and AP can support the 802. l lu protocol.
  • the STA initiates a scanning mechanism, and discovers the AP by passive scanning (beacon frame in step 601) or active scanning (the detection request frame in step 602 and the detection response frame in step 603), and acquires, for example, mutual Information such as operational elements, roaming alliance information elements, and so on.
  • the beacon frame of step 601 or the detection response frame of step 603 may carry the interworking element and the roaming alliance information element.
  • FIG. 9 is an example of a synchronous GAS query and the query response message does not require fragment transmission, except that the configuration version information is subtracted from the beacon frame or the detection response frame.
  • the embodiment of the present invention is not limited thereto, and the process shown in FIG. 5 to FIG. 7 may be similarly used, and the configuration version information is correspondingly subtracted from the beacon frame or the detection response frame. In order to avoid swearing, such a process will not be repeatedly described.
  • Figure 10 is a flow diagram of the process of re-accessing in accordance with the embodiment of Figure 9.
  • STA represents a site and AP represents an access point.
  • both STA and AP can support the 802. l lu protocol.
  • the STA detects that the AP has a related record that is successfully associated with the AP. For example, if the identifier of the AP is consistent with the identifier information in the association record, the previously saved GAS query information is obtained locally.
  • the association action between the STA and the AP is completed by associating the request frame/association response frame.
  • the STA may not perform update processing on the associated record of the AP. In this way, in the process of re-association, there is no need to obtain GAS query information from the advertisement server, which improves the access speed and enhances the user experience.
  • the updated GAS query message of the AP may be utilized to add or update the locally saved associated record. For example, if the association action between the STA and the AP fails, the previously saved association record may not include the latest GAS query information. In this case, the STA may perform a GAS query to obtain the latest GAS query information according to the process of initial access (for example, the process of FIG. 4-7 or FIG. 9).
  • step 504 of FIG. 8 it is found that the configuration version information carried in the beacon frame or the detection response frame is inconsistent with the configuration version information corresponding to the AP in the associated record, indicating that the previously saved associated record may have expired. unusable.
  • the STA may perform the initial association again according to the process of the initial access (for example, the process of FIG. 4-7 or FIG. 9).
  • the impact of the time-consuming power consumption caused by the GAS query process on the STA user experience is greatly reduced, and the 802. l lai or hotspot 2.0 wireless local area network is also well supported. Terminal fast access concept.
  • Figure 11 is a block diagram of a station in accordance with one embodiment of the present invention.
  • An example of the site 110 of FIG. 11 is the STAs of FIGS. 4-10, including a receiving unit 111 and an executing unit 112.
  • the receiving unit 111 receives a beacon frame or a detection response frame from the access point, and the beacon frame or the detection response frame carries configuration version information.
  • the execution unit 112 performs a GAS query according to the configuration version information carried by the beacon frame or the detection response frame.
  • the access point in the embodiment of the present invention sends configuration version information to the site, so that the site performs the configuration according to the configuration version information.
  • FIG. 12 is a block diagram of a station in accordance with another embodiment of the present invention.
  • the site 120 of FIG. 12 includes the receiving unit 111 and the executing unit 112 of FIG. 11, and further includes a saving unit 113 for saving an associated record for the access point, the associated record including the configuration version information of the access point and the previous GAS.
  • the GAS query information of the access point obtained from the advertisement server during the query process.
  • the association record of the embodiment of the present invention may include the GAS query information acquired from the advertisement server when initially associated with the access point, but the embodiment of the present invention is not limited thereto.
  • the association record may also include GAS query information, such as cross-network roaming information, etc., obtained from the advertisement server after the association is successful (either initial association or subsequent/re-association).
  • GAS query information such as cross-network roaming information, etc.
  • the execution unit 112 may not perform the GAS query when the configuration version information carried in the beacon frame or the detection response frame is consistent with the configuration version information included in the association record.
  • execution unit 112 may create an association request using locally saved GAS query information and send an association request to the access point.
  • the executing unit 112 may perform a GAS query when the configuration version information carried in the beacon frame or the detection response frame is inconsistent with the configuration version information included in the association record.
  • the configuration version information may include at least one of the following: a configuration change counter for indicating configuration information on the access point and/or a change status of the configuration information on the advertisement server.
  • a configuration version string for indicating the configuration information on the access point and/or the version of the configuration information on the advertisement server.
  • An example of the specific configuration version information can be seen in FIGS. 3A to 3F, and the description thereof will not be repeated.
  • the saving unit 113 may save the record for the access point after successfully association with the access point.
  • the association record saved by the saving unit 113 may further include a wireless local area network parameter (such as a l-related parameter, a vendor-specific parameter, and the like) configured on the access point.
  • the saving unit 113 when the saving unit 113 can obtain the updated GAS query information, the association record is added or updated according to the updated GAS query information.
  • the site 110 of FIG. 11 and the site 120 of FIG. 12 may perform operations related to the STAs in FIGS. 1 to 10, and are not described again in order to avoid redundancy. Therefore, the access point in the embodiment of the present invention sends the configuration version information to the site, so that the site performs the GAS query according to the configuration version information, instead of repeatedly performing the GAS query every time, thereby reducing the unnecessary GAS query process and improving the connection.
  • Figure 13 is a block diagram of an access point in accordance with one embodiment of the present invention. An example of the access point of FIG. 13 is the AP in FIGS.
  • the generating unit 131 generates a beacon frame or a detection response frame, and the beacon frame or the detection response frame carries configuration version information.
  • the transmitting unit 132 transmits the beacon frame or the detection response frame generated by the generating unit 131. Therefore, the station can perform a GAS query according to the configuration version information carried by the beacon frame or the detection response frame.
  • the access point in the embodiment of the present invention sends the configuration version information to the site, so that the site performs the GAS query according to the configuration version information, and does not need to repeatedly perform the GAS query every time, thereby reducing the unnecessary GAS query process and improving the access efficiency. .
  • the configuration version information carried by the beacon frame or the detection response frame generated by the generating unit 131 includes at least one of the following: used to indicate configuration information on the access point and/or A configuration change counter for notifying the change of the configuration information on the server; a configuration version string for indicating the configuration information on the access point and/or the version of the configuration information on the advertisement server.
  • An example of the specific configuration version information can be seen in FIGS. 3A to 3F, and the description thereof will not be repeated.
  • the access point 130 of FIG. 13 may perform the operations related to the AP in FIG. 1 to FIG. 10. To avoid repetition, details are not described herein again.
  • a communication system in accordance with an embodiment of the present invention may include the aforementioned site 110/120 or access point 130.
  • the receiving unit may be a receiver physically
  • the sending unit may be a transmitter
  • other units such as an executing unit, a saving unit, and a generating unit, may be processors.
  • 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, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) 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 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 codes. .
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk and the like, which can store program codes.

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Abstract

本发明实施例提供一种无线局域网的接入方法、站点和接入点。该方法包括:站点从接入点接收信标帧或侦测响应帧,该信标帧或侦测响应帧携带配置版本信息;站点根据信标帧或侦测响应帧携带的配置版本信息执行GAS查询。本发明实施例的接入点向站点发送配置版本信息,以便站点根据配置版本信息执行GAS查询,提高了接入效率。

Description

无线局域网的接入方法、 站点和接入点 本申请要求于 2011年 11月 1 日提交中国专利局、 申请号为 201110339998. 4、发明 名称为 "无线局域网的接入方法、 站点和接入点"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 本发明实施例涉及无线通信领域, 并且更具体地, 涉及无线局域网的接入方法、 站 点和接入点。 发明背景 IEEE ( Institute of Electrical and Electronics Engineers , 电气禾口电子工禾呈 师协会) 802. l lu是针对 IEEE 802. 11制定的一个补充标准。 IEEE 802. l lu标准研究 的主要内容是 WLAN (Wireless Local Area Network; 无线局域网) 与外部网络的互操 作功能 ( Interworking with External Networks ), 该功能允许 STA ( Station, 站点) 获取外部网络的服务接入。 该外部网络为具有签约或其他特征的外部网络, 比如 STA可 以获得签约服务供应网络 ( SSPN, Subscription service provider network) 提供的 签约服务。
IEEE 802. l lu标准中新增互操作元素 ( Interworking element ), 作为 AP (Access Point , 接入点)与 STA互操作能力和信息的载体, 以实现 WLAN基础网络与外部网络之 间的互操作行为。 此外, IEEE 802. l lu 标准中也新增了漫游联盟信息元素 (Roaming Consortium information element ) 来指示相关签约月艮务供应商 ( SSP, Subscription Service Provider) 的标识信息, AP传输该元素将有助于快速启动安全信任状的认证。 具体地, AP发送包含互操作元素与漫游联盟信息元素的信标帧(Beacon)和侦测响应帧 (Probe response ) 来帮助 STA进行网络选择。
信标帧和侦测响应帧中如果出现互操作元素则表明该 STA 支持 GAS ( Generic Advertisement Services , 通用通告服务) 协议。 GAS可以促使 STA进行网络选择。 不 管 STA处于关联还是未关联状态, GAS都能为通告服务提供传输机制, 实现网络发现和 选择功能。 查询请求 STA和查询响应 AP通过交互帧来实现 GAS查询。 具体地, 在同步 查询状态下, 首先查询请求 STA向查询响应 AP发送 GAS初始请求帧, 要求其反馈所期 望的查询信息; 查询响应 AP 收到请求后, 将查询请求信息上传到通告服务器 (Advertisement Server) 要求其反馈相应的查询信息; 通告服务器反馈相应的查询信 息; 最后查询响应 AP将反馈的查询信息以单个 GAS初始响应帧或者一个或多个 GAS恢 复响应帧为载体反馈给查询请求 STA。 采用何种载体与查询信息的大小有关, 如果查询 信息的长度过长则会被分片, 查询请求 STA在收到 GAS初始响应帧后可继续发送 GAS恢 复请求帧要求获取后续的分片。 在异步查询状态下, 首先查询请求 STA 向查询响应 AP 发送 GAS初始请求帧, 要求其反馈所期望的查询信息; 查询响应 AP收到请求后, 将查 询请求信息上传到通告服务器要求其反馈相应的查询信息; 查询响应 AP接下来发送不 包含查询信息的 GAS初始响应帧给查询请求 STA并告诉它过一段时间再来取查询信息; 通告服务器反馈相应的查询信息; 经过 AP指定的时间后, 查询请求 STA通过恢复请求 帧向 AP请求返回查询信息; 最后查询响应 AP将反馈的查询信息以单个 GAS恢复响应帧 或者一个或多个 GAS恢复响应帧为载体反馈给查询请求 STA。 采用何种载体与查询信息 的大小有关, 如果查询信息的长度过长则会被分片, 查询请求 STA在收到 GAS恢复响应 帧后可继续发送 GAS恢复请求帧要求获取后续的分片。
在现有的 802. l lu机制下,假如一个 STA通过 GAS查询流程得到 API所支持的外部 网络信息并成功与 API关联, 接下来基于某种原因 (比如由于 STA被带到 AP2所覆盖的 范围内并关联到新的 AP2上通信或者 STA在没离开的 API覆盖范围的情况下主动切换到 非 WLAN网络上通信) STA断开了和该 API的关联, 过了一段时间 STA基于某种原因(比 如 STA被带回到 API所覆盖的范围内或者 STA在没离开的 API覆盖范围的情况下主动切 换回 WLAN网络上通信) 需要重新和 API建立关联, 那么 STA需要重新通过 GAS查询流 程得到 API所支持的外部网络信息从而再次与 API关联。
可见,在现有的 802. l lu机制下, 即使外部网络信息一直保持不变, STA每次与 API 建立关联时仍然需要重新通过 GAS查询流程得到 API所支持的外部网络信息。这个过程 效率较低, 既耗时又耗电, 影响 STA的用户体验。 发明内容
本发明实施例提供一种无线局域网的接入方法、 站点和接入点, 能够解决重复进行 GAS查询流程引起的接入效率降低的问题。
一方面, 提供了一种无线局域网的接入方法, 包括: 站点从接入点接收信标帧或侦 测响应帧, 该信标帧或侦测响应帧携带配置版本信息; 站点根据信标帧或侦测响应帧携 带的配置版本信息执行 GAS查询。 另一方面, 提供了一种无线局域网的接入方法, 包括: 接入点向站点发送信标帧或 侦测响应帧, 该信标帧或侦测响应帧携带配置版本信息, 以便站点根据信标帧或侦测响 应帧携带的配置版本信息执行 GAS查询。
另一方面, 提供了一种站点, 包括: 接收单元, 用于从接入点接收信标帧或侦测响 应帧, 该信标帧或侦测响应帧携带配置版本信息; 执行单元, 用于根据信标帧或侦测响 应帧携带的配置版本信息执行 GAS查询。
另一方面, 提供了一种接入点, 包括: 生成单元, 用于生成信标帧或侦测响应帧, 信标帧或侦测响应帧携带配置版本信息; 发送单元, 用于向站点发送所述生成单元生成 的信标帧或侦测响应帧, 以便站点根据信标帧或侦测响应帧携带的配置版本信息执行 GAS查询。
本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信息执行 GAS查询, 提高了接入效率。 附图简要说明 为了更清楚地说明本发明实施例的技术方案, 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的前提下, 还可以根据这些 附图获得其他的附图。
图 1是本发明一个实施例的无线局域网的接入方法的流程图。
图 2是本发明另一实施例的无线局域网的接入方法的流程图。
图 3A至图 3F是本发明实施例的配置版本信息的例子的示意图。
图 4是本发明一个实施例的初始接入过程的流程图。
图 5是本发明另一实施例的初始接入过程的流程图。
图 6是本发明另一实施例的初始接入过程的流程图。
图 7是本发明另一实施例的初始接入过程的流程图。
图 8是按照图 4至图 7的实施例再次接入的过程的流程图。
图 9是本发明另一实施例的初始接入过程的流程图。
图 10是按照图 9的实施例再次接入的过程的流程图。
图 11是本发明一个实施例的站点的框图。
图 12是本发明另一实施例的站点的框图。 图 13是本发明一个实施例的接入点的框图。 实施本发明的方式 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是本发明一个实施例的无线局域网的接入方法的流程图。 图 1的方法由站点执 行。 101, 站点从接入点接收信标帧或侦测响应帧, 该信标帧或侦测响应帧携带配置版 本信息。
102, 站点根据信标帧或侦测响应帧携带的配置版本信息执行 GAS查询。 可选地, 作为一个实施例, 站点在信标帧或侦测响应帧中携带的配置版本信息与该 站点保存的关联记录所包括的配置版本信息一致时, 不执行 GAS查询。 可选地, 作为另一实施例, 站点在信标帧或侦测响应帧中携带的配置版本信息与该 站点保存的关联记录所包括的配置版本信息不一致时, 执行 GAS查询。 可选地, 作为另一实施例, 站点在信标帧或侦测响应帧后, 判断信标帧或侦测响应 帧中携带的配置版本信息与该站点保存的关联记录所包括的配置版本信息是否一致。 可选地, 作为另一实施例, 上述关联记录可以是预先保存的。 例如, 站点可保存针 对接入点的关联记录, 该关联记录包括接入点的配置版本信息以及在先前的 GAS查询过 程中从通告服务器获取的该接入点的 GAS查询信息。 例如, 在再次关联时, 如果信标帧或侦测响应帧中携带的配置版本信息与关联记录 所包括的配置版本信息一致, 则站点不执行 GAS查询, 而是直接根据关联记录创建关联 请求,并向接入点发送关联请求。在创建关联请求时,可使用上述关联记录中包括的 GAS 查询信息。 另外, 在因为其他情况需要执行 GAS查询时, 站点也可以在信标帧或侦测响 应帧中携带的配置版本信息与关联记录所包括的配置版本信息一致时不执行 GAS查询, 而直接使用已保存的 GAS查询信息。 本发明实施例对保存关联记录的时间不做限制。 例如, 可以在获取 GAS查询信息之 后, 建立并保存关联记录。 可选地, 作为一个实施例, 站点可以在成功关联到接入点之 后, 保存针对接入点的记录。 在 GAS查询过程中从通告服务器获取的接入点的 GAS查询信息与现有技术中类似, 因 此不再详细描述。 例如, GAS查询信息可包括漫游联盟列表, 即信标中的漫游联盟信息 元素中未包含的其余 01 ( Organizational Identifier, 组织的标识符) ; 或者, GAS查 询信息可包括 NAI (Network Access Identifier, 网络访问标识符) 领域列表。 该列表 可表示热点能接受这些领域 (realm) 的安全证书, 其中这些领域针对热点运营商或其 漫游伙伴。 该列表还提供所支持的 EAP (Extensible Authentication Protocol , 可延 伸的验证通信协议)类型。 可选地, 作为另一实施例, 关联记录还可以包括接入点上的配置信息。 接入点上的 配置信息可包括无线局域网参数、厂家特定参数或其他参数(如安全认证的相关参数)。 例如, 接入点上配置的无线局域网参数可以是与特定协议 (如 802. l lu) 相关的参数, 如互操作元素和漫游联盟信息元素所携带的信息等。 另外, 接入点上配置的厂家特定参 数可以是厂家特定信息 (Vendor Specific Information) 信息元 (该信息元可位于信 标帧或侦测响应帧中) 所携带的信息。 可选地, 作为一个实施例, 上述配置版本信息可包括用于表示上述接入点上的配置 信息和 /或通告服务器上的配置信息的变更情况的配置变更计数器, 或者用于表示上述 接入点上的配置信息和 /或通告服务器上的配置信息的版本的配置版本字符串。 下文中 还将结合附图, 详细描述配置版本信息的示例结构。 可选地, 作为另一实施例, 站点可以在获取更新的 GAS查询信息时 (例如在再次关 联的过程中或者在另一 GAS查询过程中),根据更新的 GAS查询信息增加或更新关联记录。 本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信息执行 GAS查询, 而不必每次都重复执行 GAS查询, 从而减少了不必要的 GAS查询过程, 提高了 接入效率。 信标帧或侦测响应帧中可携带接入点的标识信息, 关联记录中也可包括接入点的标 识信息。 应注意, 本发明实施例对上述标识信息的具体形式不做限制。 例如, 可使用接入点 的 MAC (Media Access Control , 媒体接入控制) 地址作为其标识信息。 MAC地址可以唯 一地标识每个接入点。 在后续关联时使用之前保存的同一 AP的 GAS查询信息, 能够提高 接入效率。 或者, 也可以使用接入点所属组的标识信息, 例如 SSID (Service Set
Identification, 服务集标识) 。 SSID可以标识接入点所在的服务集。 一个组 (例如服 务集)内的多个 AP (例如 API和 AP2)之间一般具有一定的关联性, 例如属于同一运营商, 可能使用相同的关联信息 /GAS查询信息。 在此情况下, STA之前保存的接入点 API的 GAS 查询信息同样可以在关联到 AP2时使用, 而无需通过 AP2进行 GAS查询, 这样能进一步提 高接入效率。 作为另一实施例, 也可以使用其他形式的标识信息, 如指示接入点所在地域的标识 信息。 在同一地域内, 多个 AP可能使用相同的关联信息。 在此情况下, 如果在关联到一 个 AP时能够使用之前保存的关于另一 AP的 GAS查询信息, 也能提高接入效率。 上述标识信息可以通过信标帧或侦测响应帧通知给 STA, 或者通过其他方式通知, 本发明实施例对此不作限制。 此外,本发明实施例的关联记录可包括在初始关联到接入点时从通告服务器获取的 GAS查询信息, 但本发明实施例不限于此。 例如, 关联记录也可包括在关联成功 (初始 关联或后续 /再次关联均可)之后从通告服务器获取的 GAS查询信息, 如跨网络漫游信息 等。 举例而言, 假设 STA在初始关联到 AP时, 通过 GAS查询获取了该 AP的 GAS查询信息并 在关联记录中记录了该 GAS查询信息。 此后, 由于某种原因 (不论此时是否已成功关联 至该 AP), STA需要针对该 AP再次执行 GAS查询, 则可将新获得的 GAS查询信息补充 /更新 到原来的关联记录中, 或者可以新增关联记录以记录新获得的 GAS查询信息。 图 2是本发明另一实施例的无线局域网的接入方法的流程图。 图 2的方法由接入点执 行。
201, 接入点向站点发送信标帧或侦测响应帧, 信标帧或侦测响应帧携带配置版本 信息, 以便站点根据信标帧或侦测响应帧携带的配置版本信息执行 GAS查询。 可选地, 作为一个实施例, 上述配置版本信息可包括用于表示所述接入点上的配置 信息和 /或通告服务器上的配置信息的变更情况的配置变更计数器。 或者, 上述配置版 本信息可包括用于表示所述接入点上的配置信息和 /或通告服务器上的配置信息的版本 的配置版本字符串。 配置信息的定义如上所述, 因此不再重复描述。 本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信息执行 GAS查询, 而不必每次都重复执行 GAS查询, 从而减少了不必要的 GAS查询过程, 提高了 接入效率。 上述配置版本信息用于指示接入点和 /或通告服务器的配置的变更或版本, 本发明 实施例对配置版本信息的形式不作限制。 例如, 在采用上述配置变更计数器的情况下, 配置变更计数器可以针对于接入点上的配置信息和 /或通告服务器上的配置信息的变 更, 进行相应的计数操作。 另一方面, 在采用上述配置版本字符串的情况下, 配置版本 字符串可以针对于接入点上的配置信息和 /或通告服务器上的配置信息的版本, 记录相 应的版本字符串。 下面结合具体例子, 描述配置版本信息的结构。 但是, 这些例子仅仅 是为了帮助本领域技术人员更好地理解本发明实施例, 而非要限制本发明的范围。 图 3A至图 3F是本发明实施例的配置版本信息的例子的示意图。 通常情况下, AP上的配置信息以及通告服务器上所维护的配置信息一旦被配置好就 不会经常性地改变, 这样就使得通过 GAS查询流程得到的信息被 STA复用成为了可能。 鉴 于此, 可引入版本指示的概念来记录 AP上配置的配置信息和 /或通告服务器上所维护的 配置信息的变更情况。 比如, 可以定义如图 3A所示的配置变更计数器(Configurat ion Change Counter)来 记录 AP上的配置信息和 /或通告服务器上的配置信息的变更情况。 具体地, 可以在上述 任一种配置信息每变更一次时, 相应地使得配置变更计数器加 1。 图 3A所示的配置变更计数器的结构中, 元素标识号 (Element ID)可以为 0~255中还 没有被 802. 11协议所定义用途的任何整数值 (例如但不限于 241等) , 长度 (Length ) 代表配置变更计数器所对应的字节数 (例如但不限于 1、 2、 4、 8等) 。 应注意, 图 3A的配置变更计数器也可以仅仅记录上述两种配置信息中的一种的变更 情况。 图 3B是另一配置变更计数器的例子。 在图 3B的例子中, 分别针对两种配置信息的变 更情况进行计数。 具体地, 如图所示, 元素标识号(Element ID)可以为 0~255中还没有 被 802. 11协议所定义用途的任何整数值, 长度 (Length )代表配置变更计数器所对应的 字节数。 配置变更计数器包括两个计数器, 即针对于 AP上的配置信息的计数器 1以及针 对于通告服务器上的配置信息的计数器 2, 分别记录上述两种配置的变更情况。 应注意, 虽然图 3B中显示了两种配置分别对应于两个计数器的例子, 但本发明实施 例不限于此。 配置变更计数器可以仅针对于两种配置中的一种, 相应的计数器数目可减 至一个。 图 3C是另一配置变更计数器的例子, 在图 3C的例子中, 同样分别针对两种配置信息 的变更情况进行计数, 但是使用两个元素, 即针对于 AP上的配置信息的元素标识号 1以 及针对于通告服务器上的配置信息的元素标识号 2, 分别记录上述两种配置的变更情况。 两个元素标识号(Element ID)可以为 0~255中还没有被 802. 11协议所定义用途的两个不 同整数值, 长度 (Length ) 代表相应的计数器 (计数器 1和计数器 2 ) 所对应的字节数。 应注意, 虽然图 3C中显示了两种配置分别对应于两个元素的例子, 但本发明实施例 不限于此。 配置变更计数器可以仅针对于两种配置中的一种, 相应的元素数目可减至一 个。 除了可以用配置变更计数器来记录 AP上的配置信息和 /或通告服务器上的配置信息 的变更情况外, 也可以用配置版本字符串 (Configurat ion Vers ion String ) 来记录 AP 上的配置信息和 /或通告服务器上的配置信息的版本及其变更情况。 图 3D给出了配置版本字符串的结构例子。其中元素标识号 (Element ID)可以为 0~255 中还没有被 802. 11协议所定义用途的任何整数值(例如但不限于 242等),长度(Length ) 代表配置版本字符串所对应的字节数。 应注意, 图 3D的配置版本字符串也可以仅仅记录上述两种配置中的一种的版本。 图 3E是另一配置版本字符串的例子。 在图 3E的例子中, 分别针对两种配置信息。 具 体地, 如图所示, 元素标识号(Element ID)可以为 0~255中还没有被 802. 11协议所定义 用途的任何整数值, 长度 (Length )代表配置版本字符串所对应的字节数。 配置版本字 符串包括两个计数器, 即针对于 AP上的配置信息的字符串 1以及针对于通告服务器上的 配置信息的字符串 2, 分别记录上述两种配置的版本。 应注意, 虽然图 3E中显示了两种配置分别对应于两个计数器的例子, 但本发明实施 例不限于此。 配置版本字符串可以仅针对于两种配置中的一种, 相应的字符串数目可减 至一个。 图 3F是另一配置版本字符串的例子,在图 3F的例子中,同样分别针对两种配置信息, 但是使用两个元素, 即针对于 AP上的配置信息的元素标识号 1以及针对于通告服务器上 的配置信息的元素标识号 2, 分别记录上述两种配置的版本。 两个元素标识号 (Element ID)可以为 (Γ255中还没有被 802. 11协议所定义用途的两个不同整数值, 长度 (Length) 代表相应的字符串 (字符串 1和字符串 2) 所对应的字节数。 应注意, 虽然图 3F中显示了两种配置分别对应于两个元素的例子, 但本发明实施例 不限于此。 配置版本字符串可以仅针对于两种配置中的一种, 相应的元素数目可减至一 个。 配置变更计数器(或者配置版本字符串) 由 AP和通告服务器的管理者来维护。 当管 理者重新更改了 AP上的配置信息和 /或通告服务器上所维护的配置信息时, 必须同时更 新配置变更计数器 (或者配置版本字符串) 来和先前的配置相区别。 配置变更计数器信元(或者配置版本字符串信元)可以由 AP的信标帧或者侦测响应 帧携带至站点。 下面结合具体例子, 更加详细地描述本发明的实施例, 应注意, 下面的例子仅仅是 为了帮助本领域技术人员理解本发明, 而不是要限制本发明的范围。 另外, 图 4-图 10的 实施例中, 以站点在初始关联时保存关联记录且在再次关联时使用所保存的关联记录。 但是本发明实施例不限于此, 可以在任何一次执行 GAS查询之后保存关联记录, 并且可 以在后续任何一次执行 GAS查询时使用所保存的关联记录。 图 4是本发明一个实施例的初始接入过程的流程图。 图 4的实施例中, STA表示站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。
401-403, STA启动扫描机制, 通过被动扫描(步骤 401中的信标帧)或主动扫描(步 骤 402的侦测请求帧以及步骤 403的侦测响应帧的交互)发现 AP,并获取诸如互操作元素、 漫游联盟信息元素、 配置版本信息(例如图 3A-图 3C所示的配置变更计数器或图 3D-图 3F 所示的配置版本字符串) 等信息。 图 4的实施例中, 步骤 401的信标帧或者步骤 403的侦 测响应帧可携带上述互操作元素、 漫游联盟信息元素、 配置版本信息。 404, STA检测此到本地没有此 AP成功关联的记录, 且满足 GAS查询条件, 则启动 GAS 查询机制, 向 AP发送 GAS初始查询帧, 该查询帧包含会话标识和查询请求等信息。 这里满足执行 GAS查询的条件指代的内容可以如下任一情况所述:
1) 关联过程中 STA不能识别漫游联盟信息元素中所携带的所有 01所代表的 SSP或者 SSP组的标识信息, 从而需要通过 GAS查询额外的 01信息。
2) 关联过程中 STA虽然能识别漫游联盟信息元素中所携带的所有 01所代表的 SSP (Subscription Service Provider, 签约服务供应商) 或者 SSP组的标识信息,但是互 操作元素 (Interworking element ) 中的接入的额外步骤需求字段 (ASRA: Additional Step Required for Access ) 被 AP设置为 1而且 STA也没有在信标帧或者侦测响应帧中发 现健壮安全网络(RSN)信元时, STA需要通过 GAS查询相关的网络认证类型信息(Network Authentication Type information) 从而进行下一步的关联动作。
3) STA需要查询 AP所支持的其他外部网络信息。 另一方面, 如果不满足 GAS查询条件, 例如配置改变后信标帧或侦测响应帧中的互 操作元素 /漫游联盟信息元素携带了 STA能够识别的 01信息且 STA可以通过信标帧或侦测 响应帧中的 RSN信元获得相关的认证信息, 则不需进行 GAS查询, 跳过步骤 404-407。
405, AP解析 GAS初始查询帧, 并将该帧所包含的查询请求发送到通告服务器。
406, 通告服务器处理查询请求, 将相应的查询应答返回给 AP。
407, AP向 STA返回与 GAS初始查询帧相对应的 GAS初始查询响应帧, 该响应帧包含初 始请求帧携带的会话标识、 延迟查询时间 (在图 4的例子中, 该延迟查询时间设置为 0) 和查询应答等信息。
421-422, STA通过查询应答信息, 获知该 AP的 GAS查询信息。 如果 STA决定关联到此 AP, 贝 'J通过关联请求 ( association request gKre-association request )帧 (步骤 421 ) 禾口关联响应 (association response或 re-association response) 帧 (步骤 422) , 完 成 STA与 AP的关联动作。 应注意, 步骤 421和 422只是示意性的, 参照现有技术中的相应 过程, 本发明实施例的关联动作可以包括更多相关步骤。
423, STA关联成功后, STA针对此 AP新建本地的关联记录。 关联记录可包括但不限 于: AP标识信息、 AP上配置的无线局域网参数 (如 802. l lu相关参数、 厂家特定参数等 等) 、 在 GAS查询过程 404-407中从通告服务器上得到的 AP的 GAS查询信息。 例如, 关联 记录可以采用记录表的形式, 记录表的每一项包括上述内容。 图 4的实施例是采用同步 GAS查询的过程, 查询应答信息也不需要进行分片传送。 图 5是本发明另一实施例的初始接入过程的流程图。 图 5也采用同步 GAS查询过程, 但查询 应答消息需要分片发送。 图 5的实施例中, STA表示站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。 另外, 图 5中, 与图 4相同的步骤使用相同的附图标记, 因此 将适当省略重复的描述。 图 5与图 4的不同之处主要在于:
407中的延迟查询时间不为 0。 408-409, 查询应答消息过长, STA需要在收到 GAS初始响应时, 经过上述步骤 407中 的延迟查询时间后, 通过步骤 408的 GAS恢复请求, 一次或多次向 AP请求分片传输, GAS 恢复请求中可携带会话标识。 然后 STA接收 AP返回的 GAS恢复响应 (步骤 409 ) , 该 GAS恢 复响应携带相应的会话标识和部分查询应答消息, 直到查询应答消息传完为止。 另外, 本发明实施例也可应用于异步 GAS查询的过程。 图 6是本发明另一实施例的初 始接入过程的流程图。 图 6采用异步 GAS查询过程, 查询应答消息不需要分片发送。 图 6 的实施例中, STA表示站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。 另 夕卜, 图 6中, 与图 4相同的步骤使用相同的附图标记, 因此将适当省略重复的描述。 图 6与图 4的不同之处主要在于:
404, 如果满足 GAS查询条件, 则 STA启动 GAS查询机制, 向 AP发送 GAS初始查询帧, 该查询帧包含会话标识和查询请求等信息。
405, AP解析 GAS初始查询帧, 并将该帧所包含的查询请求发送到通告服务器。
410, AP发送 GAS初始响应帧给 STA, 告诉 STA过延迟查询时间后来查询信息。
411, 通告服务器处理查询请求, 将相应的查询应答返回给 AP;
412, STA过延迟查询时间后, 通过 GAS恢复请求帧向 AP请求先前的查询信息。 413, AP通过 GAS恢复响应把查询应答消息返回给 STA。 STA通过查询应答信息, 获知 该 AP的 GAS查询信息。 图 7是本发明另一实施例的初始接入过程的流程图。 图 7采用异步 GAS查询过程, 但 查询应答消息需要分片发送。 图 7的实施例中, STA表示站点, AP表示接入点。例如, STA 和 AP均可支持 802. l lu协议。 另外, 图 7中, 与图 6相同的步骤使用相同的附图标记, 因 此将适当省略重复的描述。 图 7与图 6的不同之处主要在于: 执行一次或多次步骤 412-413,直到查询应答消息传完为止。 STA通过查询应答信息, 获知该 AP的 GAS查询信息。 图 8是按照图 4至图 7的实施例再次接入的过程的流程图。 图 8的实施例中, STA表示 站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。 501-503 , 类似于图 4的 401-403, 因此不再重复描述。
504, STA检测到此 AP有成功关联的关联记录, 例如该 AP的标识与关联记录中的标识 信息一致, 并且该信标帧或侦测响应帧中携带的配置版本信息与关联记录中的对应于该 AP的配置版本信息一致, 则将从本地获取之前保存的 GAS查询信息。 另一方面, 如果该 信标帧或侦测响应帧中携带的配置版本信息与关联记录中的对应于该 AP的配置版本信 息不一致, 则可能需要执行 GAS查询过程, 以从通告服务器获取 GAS查询信息。 或者, 可 通过其他方式 (例如从修改的信标帧或侦测响应帧) 获取所需的信息。
505-506, 类似于图 4的 421-422, 如果 STA决定关联到此 AP, 则通过关联请求帧 /关 联响应帧, 完成 STA与 AP的关联动作。
STA关联成功后, STA针对此 AP的关联记录可以不进行更新处理。 这样, 在再次关联的过程中, 无需从通告服务器获取 GAS查询信息, 提高了接入速 度, 增强了用户体验。 图 9是本发明另一实施例的初始接入过程的流程图。 图 9的实施例中, STA表示站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。
601-603, STA启动扫描机制, 通过被动扫描(步骤 601中的信标帧)或主动扫描(步 骤 602的侦测请求帧以及步骤 603的侦测响应帧的交互)发现 AP,并获取诸如互操作元素、 漫游联盟信息元素等信息。 图 9的实施例中, 步骤 601的信标帧或者步骤 603的侦测响应 帧可携带上述互操作元素、 漫游联盟信息元素。
604-607分别类似于图 4的步骤 404-407所述, 因此不再重复描述。 608-610分别类似于图 4的步骤 421-423所述, 因此不再重复描述。 类似于图 4, 图 9是同步 GAS查询且查询应答消息不需要分片传送的例子, 只是在信 标帧或侦测响应帧中减去了配置版本信息。 但本发明实施例不限于此, 也可以同样地采 用图 5-图 7所示的过程, 相应地在信标帧或侦测响应帧中减去配置版本信息。 为了避免 罗嗦, 不再重复描述这样的过程。 图 10是按照图 9的实施例再次接入的过程的流程图。图 10的实施例中, STA表示站点, AP表示接入点。 例如, STA和 AP均可支持 802. l lu协议。
701-703, 类似于图 9的 601-603, 因此不再重复描述。
704, STA检测到此 AP有成功关联的关联记录, 例如该 AP的标识与关联记录中的标识 信息一致, 则将从本地获取之前保存的 GAS查询信息。
705-706, 类似于图 9的 608-609, 如果 STA决定关联到此 AP, 则通过关联请求帧 /关 联响应帧, 完成 STA与 AP的关联动作。
STA关联成功后, STA针对此 AP的关联记录可以不进行更新处理。 这样, 在再次关联的过程中, 无需从通告服务器获取 GAS查询信息, 提高了接入速 度, 增强了用户体验。 此外, 在图 4-图 10的实施例中, 如果获取 AP的更新的 GAS查询消息, 可利用该更新 的 GAS查询消息, 增加或更新本地保存的关联记录。 例如, 如果 STA与 AP的关联动作失败, 则说明之前保存的关联记录可能不包括最新 的 GAS查询信息。在此情况下, STA可按照初次接入的过程(例如图 4-图 7或图 9的过程), 重新进行 GAS查询以获取最新的 GAS查询信息。 或者, 在图 8的步骤 504中, 发现信标帧或侦测响应帧中携带的配置版本信息与关联 记录中的对应于该 AP的配置版本信息不一致, 则说明之前保存的关联记录可能已经失效 不能用了。 在此情况下, STA可按照初次接入的过程 (例如图 4-图 7或图 9的过程) , 重 新进行初始关联。 按照本发明的上述实施例, 能够使得 GAS查询流程所带来的耗时耗电对 STA用户体验 的影响大大减轻, 也很好地支撑了 802. l lai或者热点 2. 0无线局域网络所倡导的终端快 速接入理念。 图 11是本发明一个实施例的站点的框图。 图 11的站点 110的一个例子是图 4-图 10中 的 STA, 包括接收单元 111和执行单元 112。 接收单元 111从接入点接收信标帧或侦测响应帧, 该信标帧或侦测响应帧携带配置 版本信息。 执行单元 112根据信标帧或侦测响应帧携带的配置版本信息执行 GAS查询。 本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信息执行
GAS查询, 而不必每次都重复执行 GAS查询, 从而减少了不必要的 GAS查询过程, 提高了 接入效率。 图 12是本发明另一实施例的站点的框图。 图 12的站点 120包括图 11的接收单元 111和 执行单元 112, 还包括保存单元 113, 用于保存针对接入点的关联记录, 该关联记录包括 接入点的配置版本信息以及在先前的 GAS查询过程中从公告服务器获取的该接入点的 GAS查询信息。 可选地, 作为一个实施例, 本发明实施例的关联记录可包括在初始关联到接入点时 从通告服务器获取的 GAS查询信息, 但本发明实施例不限于此。 例如, 关联记录也可包 括在关联成功(初始关联或后续 /再次关联均可)之后从通告服务器获取的 GAS查询信息, 如跨网络漫游信息等。 可选地, 作为一个实施例, 执行单元 112可在信标帧或侦测响应帧中携带的配置版 本信息与关联记录所包括的配置版本信息一致时, 不执行 GAS查询。 例如, 执行单元 112 可使用本地保存的 GAS查询信息创建关联请求, 并向接入点发送关联请求。 可选地, 作为另一实施例, 执行单元 112可在信标帧或侦测响应帧中携带的配置版 本信息与关联记录所包括的配置版本信息不一致时, 执行 GAS查询。 可选地, 作为另一实施例, 上述配置版本信息可包括以下中的至少一个: 用于表示 所述接入点上的配置信息和 /或通告服务器上的配置信息的变更情况的配置变更计数 器; 用于表示所述接入点上的配置信息和 /或通告服务器上的配置信息的版本的配置版 本字符串。 具体配置版本信息的例子可参见图 3A-图 3F所示, 为此不再重复描述。 可选地, 作为另一实施例, 保存单元 113可在成功关联到接入点之后, 保存针对接 入点的记录。 可选地, 作为另一实施例, 保存单元 113保存的关联记录还可以包括接入点上配置 的无线局域网参数 (比如 l lu相关参数, 厂家特定参数等) 。 可选地, 作为另一实施例, 保存单元 113还可以获取更新的 GAS查询信息时, 根据更 新的 GAS查询信息增加或更新关联记录。 图 11的站点 110和图 12的站点 120可执行图 1-图 10中涉及 STA的操作, 为避免重复, 不再赘述。 因此, 本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信 息执行 GAS查询, 而不必每次都重复执行 GAS查询, 从而减少了不必要的 GAS查询过程, 提高了接入效率。 图 13是本发明一个实施例的接入点的框图。 图 13的接入点的一个例子是是图 4-图 10 中的 AP, 包括生成单元 131和发送单元 132。 生成单元 131生成信标帧或侦测响应帧, 该信标帧或侦测响应帧携带配置版本信息。 发送单元 132发送生成单元 131生成的信标帧或侦测响应帧。从而该站点可根据信标帧或 侦测响应帧携带的配置版本信息执行 GAS查询。 本发明实施例的接入点向站点发送配置版本信息, 以便站点根据配置版本信息执行 GAS查询, 而不必每次都重复执行 GAS查询, 从而减少了不必要的 GAS查询过程, 提高了 接入效率。 可选地, 作为一个实施例, 生成单元 131生成的信标帧或侦测响应帧所携带的配置 版本信息包括以下中的至少一个: 用于表示所述接入点上的配置信息和 /或通告服务器 上的配置信息的变更情况的配置变更计数器; 用于表示所述接入点上的配置信息和 /或 通告服务器上的配置信息的版本的配置版本字符串。具体配置版本信息的例子可参见图 3A-图 3F所示, 为此不再重复描述。 图 13的接入点 130可执行图 1-图 10中涉及 AP的操作, 为避免重复, 不再赘述。 根据本发明实施例的通信系统可包括上述站点 110/120或接入点 130。 可选地, 上述实施例中, 接收单元物理上可以为接收机, 发送单元可以为发射机, 而其他的单元, 如执行单元, 保存单元及生成单元可以为处理器。 本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各示例的单元 及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结合来实现。 这些功能究 竟以硬件还是软件方式来执行, 取决于技术方案的特定应用和设计约束条件。 专业技术 人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认 为超出本发明的范围。 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, 上述描述的系统、 装置和单元的具体工作过程, 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, 所揭露的系统、 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。 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。 所述功能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 储在一个计算机可读取存储介质中。 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部分可以以软件产品的形式体现出来, 该 计算机软件产品存储在一个存储介质中, 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)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
1、 一种无线局域网的接入方法, 其特征在于, 包括:
站点从接入点接收信标帧或侦测响应帧,所述信标帧或侦测响应帧携带配置版本信 息;
所述站点根据所述信标帧或侦测响应帧携带的配置版本信息执行通用通告服务 GAS 查询。
2、 如权利要求 1所述的方法, 其特征在于, 所述站点在所述信标帧或侦测响应帧中 携带的配置版本信息与所述站点保存的关联记录所包括的配置版本信息一致时, 不执行 GAS查询; 或者,
所述站点在所述信标帧或侦测响应帧中携带的配置版本信息与所述站点保存的关 联记录所包括的配置版本信息不一致时, 执行 GAS查询。
3、 如权利要求 2所述的方法, 其特征在于, 所述关联记录包括所述接入点的配置版 本信息以及在先前的 GAS查询过程中从通告服务器获取的所述接入点的 GAS查询信息。
4、 如权利要求 3所述的方法, 其特征在于, 所述站点在所述信标帧或侦测响应帧中 携带的配置版本信息与所述站点保存的关联记录所包括的配置版本信息一致时, 不执行 GAS查询, 包括:
所述站点在所述信标帧或侦测响应帧中携带的配置版本信息与所述站点保存的关 联记录所包括的配置版本信息一致时, 使用所述 GAS查询信息而不执行 GAS查询。
5、 如权利要求 1-4任一项所述的方法, 其特征在于, 所述配置版本信息包括以下中 的至少一个: 用于表示所述接入点上的配置信息的变更情况和 /或通告服务器上的配置信息的变 更情况的配置变更计数器;
用于表示所述接入点上的配置信息的版本和 /或通告服务器上的配置信息的版本的 配置版本字符串。
6、 如权利要求 2-4任一项所述的方法, 其特征在于, 所述关联记录是所述站点在成 功关联到所述接入点之后保存的。
7、 如权利要求 2-4任一项所述的方法, 其特征在于, 所述关联记录还包括所述接入 点上的配置信息。
8、 一种无线局域网的接入方法, 其特征在于, 包括:
接入点向站点发送信标帧或侦测响应帧,所述信标帧或侦测响应帧携带配置版本信 息, 以便所述站点根据所述信标帧或侦测响应帧携带的配置版本信息执行通用通告服务 GAS查询。
9、 如权利要求 8所述的方法, 其特征在于, 所述配置版本信息包括以下中的至少一 个. 用于表示所述接入点上的配置信息和 /或通告服务器上的配置信息的变更情况的配 置变更计数器;
用于表示所述接入点上的配置信息和 /或通告服务器上的配置信息的版本的配置版 本字符串。
10、 一种站点, 其特征在于, 包括:
接收单元, 用于从接入点接收信标帧或侦测响应帧, 所述信标帧或侦测响应帧携带 配置版本信息;
执行单元,用于根据所述信标帧或侦测响应帧携带的配置版本信息执行通用通告服 务 GAS查询。
11、 如权利要求 10所述的站点, 其特征在于, 还包括:
保存单元, 用于保存针对所述接入点的关联记录, 所述关联记录包括所述接入点的 配置版本信息以及在先前的 GAS查询过程中从通告服务器获取的所述接入点的 GAS查询 信息。
12、 如权利要求 11所述的站点, 其特征在于, 所述执行单元具体用于在所述信标帧 或侦测响应帧中携带的配置版本信息与所述关联记录所包括的配置版本信息一致时,使 用所述 GAS查询信息而不执行 GAS查询; 或者, 在所述信标帧或侦测响应帧中携带的配置 版本信息与所述关联记录所包括的配置版本信息不一致时, 执行 GAS查询。
13、 如权利要求 11所述的站点, 其特征在于, 所述保存单元具体用于在成功关联到 所述接入点之后, 保存针对所述接入点的关联记录。
14、 如权利要求 11所述的站点, 其特征在于, 所述保存单元保存的关联记录还包括 所述接入点上的配置信息。
15、 一种接入点, 其特征在于, 包括:
生成单元, 用于生成信标帧或侦测响应帧, 所述信标帧或侦测响应帧携带配置版本 信息;
发送单元, 用于向站点发送所述生成单元生成的信标帧或侦测响应帧, 以便所述站 点根据所述信标帧或侦测响应帧携带的配置版本信息执行通用通告服务 GAS查询。
PCT/CN2012/077501 2011-11-01 2012-06-26 无线局域网的接入方法、站点和接入点 WO2013063942A1 (zh)

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