WO2013189260A1

WO2013189260A1 - Method, terminal, server and system for selecting an access point in wireless local area network

Info

Publication number: WO2013189260A1
Application number: PCT/CN2013/077236
Authority: WO
Inventors: 曹振; 杨葳; 邓辉
Original assignee: 中国移动通信集团公司
Priority date: 2012-06-21
Filing date: 2013-06-14
Publication date: 2013-12-27
Also published as: CN103517372A

Abstract

Disclosed is an access point selection method in a wireless local area network (WLAN), comprising: for a WLAN user terminal, searching for a WLAN, displaying the found WLAN and the tariff information of the WLAN, and selecting an access WLAN according to the tariff information of the WLAN; as for an access point, when the WLAN user terminal searches for a network, the access point provides the preconfigured tariff information of the WLAN to the WLAN user terminal. Also provided are a user terminal, access server and system for selecting an access point in a WLAN. The technical solution of the present invention enables a user terminal to acquire the tariff information of a network at the network searching stage, thus facilitating quick network selection of the user terminal.

Description

Method, terminal, server and system for selecting access point in domain network

The present invention relates to the field of wireless communications, and in particular, to a user terminal, an access server, and a system for selecting an access point in a wireless local area network. Wireless Local Area Network (WLAN) is a wireless broadband access method that supports mobile features in a certain area, and provides a broadband access method for user terminals to access the Internet. Through the WLAN access system, the user terminal can use various Internei services such as WWW, FTP, and E-mail at high speed. The WLAN access system is mainly composed of an access point (AP, Access Point) and a wireless access point controller (AC). The WLAN access system is used to complete access, access control, and charging information of the WLA user terminal. Acquisition and business management and control. The access point is a small wireless base station device in the WLAN access system, which is used to complete the wireless access involved in the 802, 11 series of standards. The access point is also a network bridge, as a bridge connecting the wired network and the wireless network, any The WLAN user terminal can access the wired network resources through the corresponding access point. In terms of security control, the access point can control the access of the user terminal through the network logo and the medium access control (MAC, !Vledia Access Control) address; meanwhile, the air encryption of the access point support (WEP, Wired Equivalent Privacy) technology Function to protect the information security of the user terminal. In terms of data communication, the access point is responsible for encrypting and decrypting the data packets that interact with the WLAN user terminal.

The first step of the user terminal accessing the WLAN is to select an access point. In the prior art, the selection of the access point is implemented by using a Service Set identifier (SSID), and the user terminal selects when searching for the surrounding network. The familiar SSID; for example, select the CMCC SSID provided by China Mobile to access the WLAN. However, this method of statically selecting an access point encounters many problems in a complicated scenario. l: When the user terminal roams or there is no network of the SSID provided by the user terminal, the user terminal cannot judge the access by searching the SSID. The characteristics of the network, such as the IP address of the access network and the roaming relationship of the access network, etc., in this case, the user terminal often can only test the SSID one by one, and the process of testing the SSID is very complicated and inefficient. Therefore, IEEE released the 802, 1111 standard in 2011, providing a Layer 2 network discovery mechanism and wireless fidelity (WiFi, Wireless). The Fidelity Alliance also began to develop an 802J lu-based interoperable product standard Wireless Hotspot 2.0 (Hoispot2.0) in 2011. _o 802. Ilu and Hotspoi 2, the 0 series of standards all extend the air interface signaling between the user terminal and the access point. User terminals are able to deliver more information. Currently, the extensions supported by the Hot _S pot 2,0 standard include roaming relationships, location information of access points, authentication types, 3GPP network information (for WLAN and cellular network convergence for user terminals), IP address W: information, wide area network Evaluation information, etc., the user terminal selects different access points to access the WLAN according to the above information broadcasted by the access point.

In addition, when the user terminal selects the access network, an important criterion is the tariff policy for accessing the network. When the user terminal accesses the network during roaming or in an area not covered by the home network, it is often more accustomed to selecting a free network or tariff. Relatively cheap network. However, in the prior art, only after the user terminal accesses the network and obtains the IP address W:, the user terminal is redirected to the portal interface to display the tariff policy of the network. If the user is not satisfied, the user can only re-select. The SSID repeats the above process; thus, it causes a lot of inconvenience to the household. The invention patent application with the application number of 200910164960,0 proposes a solution, the user terminal needs to access the tariff server after accessing the network, or select the network according to the tariff reminding short message provided by the wireless network operator of each standard; however, this The method still requires the user terminal to obtain the tariff information after accessing the network, and is limited by the deployment of the tariff server. The present invention is directed to a method for selecting an access point in a wireless local area network, a user terminal, an access server, and a system, so that the user terminal can obtain the network tariff information during the network search phase, which is convenient. ^ The terminal quickly selects the network.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a method for selecting an access point in a wireless local area network, including: searching for a WLAN;

Displaying the searched WLAN and the tariff information of the WLAN;

The accessed WLAN is selected according to the tariff information of the WLAN.

In the above method, the tariff information of the WLAN includes: whether the WLAN corresponding to the access point is a charging network;

When the WLAN is a network, the tariff information of the WLAN further includes: a fee type of the WLAN and/or a charging detailed information of the corresponding charging type.

In the above method, the tariff information indicating the searched WLAN and the WLAN is: The WLAN user terminal receives the tariff information of the WLAN provided by each access point through the broadcast message, and the WLAN user terminal displays the searched WLAN and the tariff information of the WLAN;

Or, the WLAN user terminal displays the searched WLAN, and the cluster access point actively queries the tariff information of the WLAN.

In the above method, the WLAN user terminal receives the tariff information of the WLAN provided by each access point through the broadcast message:

When the WLAN user terminal searches for the network, it receives the broadcast message sent by each access point, and obtains the tariff information of the WLAN corresponding to the access point from the basic data frame carried by the broadcast message.

In the above method, the WLAN user terminal actively queries the WLAN for the tariff information from the access point as:

When the WLAN user terminal searches for the network, sends an inquiry message to the access point;

When the WLAN corresponding to the access point is a non-accounting network, the WLAN ffi terminal receives the first response message; the first response message carries the tariff information of the WLAN, and the tariff information of the WLAN includes the WLAN as a non-fee network.

When the WLAN corresponding to the access point is the charging network, the WLAN user terminal receives the second response message; the second response message carries the tariff information of the WLAN, and the tariff information of the WLAN includes the WLAN as the charging network and the WLAN. Billing details for the fee type and/or the corresponding billing type.

In the above method, the second response message is a broadcast message or a transport layer protocol message.

In the above method, the broadcast protocol message is an access network query 1# ANQP message, and a charging detailed information element is added in a vendor custom field in the ANQP message.

In the above method,

The value of the type of the charging detailed information element ranges from 8 to 255;

The charging detailed information element includes: a field indicating a total length of the payload, a field indicating a charging type, and/or a field indicating charging detailed information;

The field indicating the charging type includes a reserved bit, a calculated bit by flow, and/or a calculated bit by time, a reserved bit; the value of the reserved bit is 0, the value of the calculated bit by the flow is an integer greater than 0, and the value of the calculated bit by time is an integer greater than 0.

In the above method, the WLAN selected to be accessed according to the tariff information of the WLAN is:

The WLAN user terminal selects the accessed WLAN among the searched plurality of WLAN tariff information according to a pre-configured selection rule;

Or, after displaying the searched WLAN tariff information, the WLAN user terminal receives the WLAN selected by the user according to the displayed WLAN tariff information.

The present invention also provides a method for selecting an access point in a wireless local area network, including:

When the WLAN user terminal searches for the network, the access point provides the pre-configured WLAN tariff information to the WLAN user terminal.

In the above method, the method further comprises: the access point receiving the WLAN selected by the WLAN user terminal. In the above method,

The tariff information includes: whether the WLAN corresponding to the access point is a charging network;

When the WLAN is a charging network, the tariff information further includes: a charging type of the WLAN and a charging detailed information of the Z or the corresponding charging type.

In the above method, when the WLAN user terminal searches for a network, the access point provides the pre-configured WLAN tariff information to the WLAN user terminal as:

The WLAN user terminal searches for the network ^, and the access point provides the pre-configured WLAN tariff information to the WLAN user terminal through a broadcast message.

After receiving the query message sent by the WLAN user terminal, when the WLAN corresponding to the access point is a non-accounting network, the first response message is returned to the WLAN user terminal; the tariff information of the WLAN carried in the first response message is The tariff information of the WLAN includes the WLAN as a non-billing network.

After receiving the query message sent by the WLAN user terminal, when the WLAN corresponding to the access point is the charging network, the second response message is sent to the WLAN user terminal; the second response message carries the tariff information of the WLAN, and the WLAN The tariff information includes WLAN as the billing network, WLAN Billing type, billing details corresponding to the billing type.

In the above method, the access point provides the tariff information of the pre-configured WLAN to the WLAN user terminal by using a broadcast message: each access point adds the configured tariff information of the WLAN to the basic data frame, and periodically sends out the carried The broadcast message of the basic data frame.

In the above method, the broadcast protocol message is an access network query ANQP message, and the charging detailed information element is added in a vendor custom field in the ANQP message.

In the above method,

The value of the type of the charging detailed information element ranges from 8 to 255 _;

The field indicating the charging type includes a reserved bit, a calculated bit by flow, and/or a calculated bit by using a length, and a reserved bit; the value of the reserved bit is 0, and the value of the calculated bit by the flow is greater than An integer of 0, the value of the calculation of the time length is an integer greater than 0.

The present invention also provides a WLAN user terminal, including: a search unit, a display unit, and a selection unit;

a search unit for searching for a WLAN;

a display unit, configured to display the WLAN searched by the search unit and the tariff information of the WLAN;

a selection unit, configured to select an access WLAN according to the tariff information of the WLAN displayed by the display unit

In the above WLAN user terminal, the selection unit further includes a first receiving unit and a first selecting subunit; wherein

a first receiving unit, configured to receive a pre-configured selection rule;

And a first selection sub-unit, configured to select, according to the selection rule received by the first receiving unit, the WLAN that is accessed by displaying the tariff information of the plurality of WLANs searched by the m-element.

In the above WLAN user terminal, the selection unit further includes a second receiving unit and a second selection unit; wherein

The second receiving unit, after displaying the searched WLAN tariff information, receives the user according to The WLAN selected by the display unit for the tariff information of the WLAN;

a second selection subunit, configured to select a WLAN according to the WLAN received by the second receiving unit. The present invention also provides an access server, including: a storage unit and an information providing unit; wherein, the storage unit is configured to store pre-configured tariff information of the WLAN;

The information providing unit is configured to provide, when the WLAN user terminal searches for the network, the tariff information of the WLAN stored by the storage unit to the WLAN user terminal.

In the above server, the server further includes:

The receiving unit is configured to receive the WLAN selected by the WLAN user terminal.

The present invention also provides a system for selecting an access point in a wireless local area network, including: a WLAN user terminal, an access point;

The WLAN user terminal, searching for the WLAN, displaying the searched WLA and the tariff information of the WLAN, and selecting the accessed WLAN according to the tariff information of the WLAN;

The access point is used to provide the WLAN user terminal with the pre-configured WLAN tariff information when searching for the network.

The method for selecting an access point in a wireless local area network, a user terminal, an access server, and a system, for a WLAN user terminal, searching for a WLAN; displaying the searched WLAN and the tariff information of the WLAN; according to the tariff of the WLAN For the access point, when the WLAN user terminal searches for the network, the access point provides the pre-configured WLAN tariff information to the WLAN terminal, so that the user terminal does not access the network. Obtaining the tariff information of the network, so that the user terminal can obtain the tariff information of the network during the network search phase, so that the user terminal can quickly select the network.

Other features and advantages of the invention will be set forth in part in the description which follows. The object and other advantages of the invention will be realized and attained by the <RTIgt;

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawing - 2 is a schematic structural diagram of a network selection environment of a WLAN user terminal according to the present invention; FIG. 3 is a schematic flowchart of Embodiment 2 of a method for selecting an access point in a wireless local area network according to the present invention;

4(a) is a schematic structural diagram of Embodiment 1 of a WLAN user terminal according to the present invention; FIG. 4(b) is a schematic structural diagram of Embodiment 2 of a WLAN user terminal according to the present invention; and FIG. 5 is a schematic structural diagram of an access point according to the present invention;

6 is a schematic structural diagram of a system for implementing an access point in a wireless local area network according to the present invention. The preferred embodiments of the present invention are described in the following, and the preferred embodiments described herein are intended to illustrate and explain the invention.

The basic idea of the present invention is: searching for a WLAN for a WLAN user terminal; displaying the searched WLAN and the tariff information of the WLAN; selecting an accessed WLAN according to the tariff information of the WLAN; and searching for the access point, the WLAN user terminal The network ^, the access point provides the tariff information of the pre-configured WLAN to the WLAN user terminal.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The present invention provides a method for selecting an access point in a wireless local area network. FIG. 1 is a schematic flowchart of Embodiment 1 of a method for selecting an access point in a wireless local area network according to the present invention, which is based on a selection of a WLAN user terminal side in a wireless local area network. The method of entering the point, as shown in Figure 1, the method includes the following steps:

Step 101: The WLAN user terminal searches for a network, and displays the searched WLA and WLAN tariff information;

Specifically, each access point periodically sends a broadcast message according to a pre-configured broadcast period, where the broadcast message carries a basic data frame defined in the 802.11 standard, and the access point adds the pre-configured WLAN tariff information to the basic data frame. For example, the basic data frame may be a Beacon Frame defined in the IEEE802 ii-2007 standard, in the SSID Information Element field or the Vendor Specific Information element of the indication ^ Add the pre-configured WLAN tariff information to the Element) field; In this case, when the WLAN user terminal searches for the network, the WLAN user terminal can search for the broadcast message sent by each access point, and the basic data carried in the broadcast message obtains the tariff information of the WLAN corresponding to the access point, and the WLAN user The terminal displays the WLAN and the tariff information of the WLAN; or, the WLAN user terminal can display the searched WLAN when searching the network, and then the WLAN user terminal can send an inquiry message to the access point to actively query the WLAN tariff information; After the WLAN user terminal sends the Query message, if the WLAN corresponding to the access point is a non-accounting network, the access point may directly return the pre-configured WLAN tariff information to the WLAN user terminal by using the first response message, where The tariff information of the WLAN carried in the first response message includes that the WLAN is a non-billing network; the WLAN user terminal receives the first response message, and displays the tariff information of the WLAN therein;

Or, the WLAN user terminal may display the searched WLAN when searching the network, and then the WLAN user terminal may send an inquiry message to the access point to actively query the tariff information of the WLAN; if the WLAN corresponding to the access point is a charging network, The access point may send the tariff information of the pre-configured WLAN to the WLAN ffi terminal through the second response message, where the tariff information of the WLAN carried in the second response message includes the WLAN as the charging network, the WLAN fee type, The WLAN user terminal can receive the second responsive message of the WLAN charging information, and the WLAN user terminal displays the tariff information of the WLAN.

The second response message may be a broadcast 1# negotiation message proposed in the 802.11U standard, or may be a message that may carry the WLAN tariff information, such as a transport layer protocol message;

For example, in this embodiment, the broadcast protocol message proposed in the 802.iiu standard may be an Access Network Query Protocol (ANQP) message, and the tariff information is carried by the vendor-defined field in the ANQP message; Currently, the access network type field provided by 802, lhi only has 4Wt to indicate whether the network is charged, but cannot provide specific charging information in the case of charging. Therefore, the ANQP message needs to be extended to carry the information, for example, in the ANQP message. The extension adds an element whose name is the charging details, as shown in Table 1, due to 802. 0~7 in the iiu standard has been configured with other meanings, so the value of the type of this element has a value range of 8~255 _; Element Name (Subtype Value) Charging Details An integer number greater than or equal to 8 i less than or equal to 255.

The structure of the payload corresponding to the charging detailed information element included in the ANQP message is as shown in Table 2. The first field is used to indicate the total length of the payload, and the length of the first field is fixed; the second field is used. In the representation of the charging type, the length of the second field is fixed; the third field is used to indicate the detailed information, according to the different type, the third word;

Table 2

Since the charging type includes at least two types of traffic calculation and time length calculation, other types of charging may be designed for the purpose of expansion. For the type of charging in Table 2, as shown in Table 3, the charging type is as shown in Table 3. The corresponding second field includes a reserved bit, a flow calculation unit, and a Z or a time length calculation bit, and a reserved bit, wherein the minimum value 0 is used as a reserved bit, and is not used, and the flow rate calculation and the time length calculation can be correspondingly greater than 0. The integer value; the value of the reserved bit needs to be set according to other charging types, which is convenient for future expansion;

table 3

Step 102: The WLAN user terminal selects the accessed WLAN according to the tariff information of the WLAN. Specifically, after the WLAN user terminal searches for the network, the WLAN user terminal can search for the WLAN tariff information provided by each access point through the broadcast message, or WLAN. The user terminal actively obtains the tariff information of the WLAN from the access point; the selection rule can be pre-configured in the WLAN user terminal, and the WLAN user terminal selects the appropriate WLAN among the searched plurality of WLAN tariff information according to the pre-configured selection rule. Or, after the WLAN user terminal displays the searched tariff information of the WLAN, the receiving ffi household selects the WLAN according to the displayed tariff information of the WLAN; the WLAN user terminal provides the selected WLAN to the access point, and the WLAN ffi terminal can further Initiate recognition After the authentication and authentication process is completed, the WLAN network W:, and then the WLAN, can be obtained.

3 is a schematic flowchart of Embodiment 2 of a method for selecting an access point in a wireless local area network according to the present invention, which is based on a method for selecting an access point on an access point side of a wireless local area network. As shown in FIG. 3, the method includes the following steps. Steps:

Step 301: The access point receives the pre-configured tariff information of the WLAN.

Specifically, FIG. 2 is a structural diagram of a network selection environment of a WLAN user terminal according to the present invention. As shown in FIG. 2, a WLAN provided by multiple operators and a corresponding access point AP1~AP carrier are deployed around the WLAN user terminal. The information of the WLAN is sent to the access point by using the message interface. The access point receives the configuration message sent by the operator, and saves the configuration message locally. The tariff information of the WLAN includes: Whether the WLAN is a fee network; if the WLAN is a charging network, the tariff information of the WLAN also needs to include: a WLAN fee type, a corresponding charging type, a fee detailed information, etc., wherein the charging type includes Billing by time and by data flow metering;

The message interface used by the operator to configure the tariff information of the WLAN is located in a network provided by the operator, and the message interface may be defined by using a protocol between the access point and the wireless controller, for example, an existing Internet engineering task group. (IEW, Internet Engineering Task Force) Protocol for Control and Provisioning of Wireless Access Points (CAPWAP);

The operator can periodically update the tariff information of the previously configured WLAN, and use the message interface to send the new WLAN tariff information to the access point; the access point replaces the previously saved WLAN tariff with the received new WLAN tariff information. Information, complete the local WLAN tariff information more o

In the present invention, the WLAN tariff information is directly configured on the access point, and there is no need to separately deploy a server that manages the tariff information, thereby reducing hardware transformation and reducing the operator's transformation cost.

Step 302: When the WLAN user terminal searches for the network, the access point provides the pre-configured WLAN tariff information to the WLAN ffi home terminal.

Specifically, each access point periodically sends a broadcast message according to a pre-configured broadcast period, where the broadcast message carries a basic data frame defined in the 802.11 standard, and the access point configures the WLAN. The tariff information is added to the basic data ^, for example, the basic data frame can be

A beacon frame defined in the IEEE802.U-2007 standard, where the configured WLAN tariff is added in the SSID Information Element field or the Vendor Specific Information Element field of the indication ^ In this way, when the WLAN user terminal searches for the network date, the access point can provide the pre-configured WLAN tariff information to the WLAN user terminal by using the broadcast message, and the WLAN user terminal can cluster the basic data carried by the broadcast message. Obtaining the tariff information of the WLAN corresponding to the access point;

Or, the access point may receive the query message sent by the WLAN user terminal when searching the network. After receiving the query message sent by the WLAN user terminal, if the WLAN corresponding to the access point is a non-accounting network, the access point may directly The tariff information of the WLAN is returned to the WLAN user terminal by using the first response message; the tariff information of the WLAN carried in the first response message includes the WLAN being a non-accounting network;

Or, the access point may receive the query message sent by the WLAN terminal when searching the network. After receiving the query message sent by the WLAN user terminal, if the WLAN corresponding to the access point is a charging network, the access point may The tariff information of the WLAN is sent to the WLAN ffi terminal through the second response message. The tariff information of the WLAN carried in the second response message includes the charging type of the WLAN, the charging type of the WLAN, and the detailed information of the charging type. ;

The second response message may be a broadcast protocol message proposed in the 802, 1111 standard, or may be a message that may carry WLAN tariff information, such as a transport layer protocol message;

For example, in this embodiment, the broadcast protocol message proposed in the 802J1U standard may be an Access Network Query Protocol (ANQP) message, and the tariff information is carried by the vendor custom field in the ANQP message; The access network type field provided by 802.ii _U only has 4 bits to indicate whether the network is charged, but cannot provide specific charging information under the 'fee case. Therefore, the ANQP message needs to be extended to carry the information, for example, the ANQP message can be The extension adds an element whose name is charging details, as shown in Table 1. Since 0 to 7 of the 802.llu standard has been configured with other meanings, the type of this element is valued. The value of Fan Park is 8~255 _;

The structure of the payload corresponding to the detail information element included in the ANQP message is as shown in Table 2, wherein the first field is used to indicate the total length of the payload, and the length of the first field is fixed; The second field is used to indicate the charging type, the length of the second field is fixed; the third field is used to indicate the charging detailed information, and the length of the third field is ok according to the charging type. Changed; the value of the reserved bit needs to be set according to other charging types, which is convenient for future expansion;

Since the charging type includes at least two types of traffic calculation and time-based calculation, other types of charging may be designed for the purpose of expansion. For the charging type in Table 2, as shown in Table 3, the charging type corresponds to The second field includes a reserved bit, a calculated bit by flow, and/or a calculated bit according to the duration, and a reserved bit, wherein the minimum value 0 is used as a reserved bit, not used, and the flow rate calculation and the time length calculation may correspond to a value greater than 0. Integer.

Step 303: The access point receives the WLAN selected by the WLAN user terminal.

Specifically, after searching for the network, the WLAN user terminal can search for the tariff information of the WLAN provided by each access point through the broadcast message, or the WLAN user terminal actively obtains the tariff information of the WLAN from the access point, and the WLAN user terminal can be pre-configured according to the pre-configuration. Selection rules, and the tariff information of multiple WLANs received, select the appropriate WLAN;

The access point receives the WLAN selected by the WLAN user terminal. After the WLAN is selected, the WLAN user terminal can initiate the authentication and authentication process. After the authentication and authentication are completed, the WLAN network address can be obtained, and then the WLA is accessed.

To achieve the above method, the present invention further provides a WLAN user terminal, and FIG. 4(a) is a schematic structural diagram of Embodiment 1 of the WLAN user terminal according to the present invention. As shown in FIG. 4(a), the WLAN user terminal includes: Unit 40, display unit 41, selection unit 42;

Search unit 40, used to search for WLAN;

The display unit 41 is configured to display the WLA searched by the search unit 40 and the tariff information of the WLAN;

The selecting unit 42 is configured to select the accessed WLAN according to the tariff information of the WLAN displayed by the display unit 41.

The selection unit 42 further includes a first receiving unit 421 and a first selection subunit 422: wherein

The first receiving unit 421 is configured to receive a pre-configured selection rule.

The first selection sub-unit 422 is configured to select an appropriate WLAN in the tariff information of the plurality of WLANs searched by the display unit 41 according to the selection rule received by the first receiving unit 421. The present invention also provides a WLAN user terminal, and FIG. 4(b) is a schematic structural diagram of Embodiment 2 of the WLAN user terminal according to the present invention. As shown in FIG. 4(b), the WLAN user terminal includes: a search unit 40 and a display unit. 41, a selection unit 42; wherein

Search unit 40, used to search for WLAN;

The display unit 4! is configured to display the WLAN searched by the search unit 40 and the WLAN of the WLAN, and the /: "r & selection unit 42 is configured to select the accessed WLAN according to the tariff information of the WLAN displayed by the display unit 41.

The selection unit 42 further includes a second receiving unit 423 and a second selecting subunit 424;

The second receiving unit 423 is configured to: after displaying the tariff information of the searched WLAN, receive the WLAN selected by the user according to the tariff information of the WLAN displayed by the display unit 41;

a second selection subunit 424, configured to select a WLAN according to the WLAN received by the second receiving unit 423

The present invention also provides an access server. FIG. 5 is a schematic structural diagram of an access server according to the present invention. As shown in FIG. 5, the access server includes: a storage unit 50 and an information providing unit 51. For storing the tariff information of the pre-configured WLAN;

The information providing unit 51, when the WLAN user terminal searches for the network, provides the tariff information of the WLAN stored by the storage unit 50 to the WLAN user terminal.

The access server also includes:

The receiving unit 52 is configured to receive the WLAN selected by the WLAN user terminal.

The present invention also provides a system for selecting an access point in a wireless local area network. FIG. 6 is a schematic structural diagram of a system for implementing an access point in a wireless local area network according to the present invention. As shown in FIG. 6, the system includes: a WLAN user terminal 60, Access point 61; wherein

The WLAN ffi terminal 60 is configured to search for a WLAN, display the searched WLAN, and the tariff information of the WLAN, and select the accessed WLAN according to the tariff information of the WLAN;

The access point 6 i is configured to provide the pre-configured WLAN tariff information to the WLAN user terminal 60 when the WLAN user terminal 60 searches for the network.

The invention has been described above with sufficient specificity in detail. In the field It should be understood by those skilled in the art that the description of the embodiments is merely exemplary, and that all changes should be made without departing from the true spirit and scope of the invention. The scope of the invention as defined by the appended claims is defined by the appended claims rather

Claims

A method for selecting an access point in a wireless local area network, the method comprising: searching for a WLAN;

Displaying the searched WLAN and the tariff information of the WLAN;

The accessed WLAN is selected according to the tariff information of the WLAN.

2. The method of claim 1 wherein

The tariff information of the WLAN includes: whether the WLAN corresponding to the access point is a charging network; the WLAN is a charging network day, and the tariff information of the WLAN further includes: a charging type of the WLAN and/or a corresponding charging type. Billing details.

The method according to claim 1, wherein the tariff information for displaying the searched WLAN and the WLAN is:

The WLAN user terminal receives the tariff information of the WLAN provided by each access point through the broadcast message, and the WLAN user terminal displays the searched WLAN and the tariff information of the WLAN;

Or, the WLAN user terminal displays the searched WLAN, and actively queries the WLAN for the tariff information from the access point.

The method according to claim 3, wherein the WLAN user terminal receives the tariff information of the WLAN provided by each access point through the broadcast message:

The method according to claim 3, wherein the WLAN user terminal actively queries the WLAN for the tariff information from the access point:

When the WLAN user terminal searches for the network, sends an inquiry message to the access point; When the WLAN corresponding to the access point is the charging network, the WLAN user terminal receives the second response message; the second response message carries the tariff information of the WLAN, and the tariff information of the WLAN includes the WLAN as the charging network and the WLAN. Billing details for the fee type and/or the corresponding billing type.

The method according to claim 6, wherein

The second response message is a broadcast protocol message or a transport layer protocol message.

8. The method of claim 7 wherein:

The broadcast protocol message is an access network query protocol ANQP message, and a charging detail information element is added in a vendor custom field in the ANQP message.

9. The method of claim 8 wherein:

The method according to claim 1, wherein the WLAN selected to be accessed according to the tariff information of the WLAN is:

A method for selecting an access point in a wireless local area network, the method comprising: when the WLAN user terminal searches for a network, the access point provides the pre-configured tariff information of the WLAN to the WLAN user terminal.

The method according to claim 11, wherein the method further comprises: the access point receiving the WLAN selected by the WLAN user terminal.

13. The method of claim n, wherein

The tariff information includes: whether the WLAN corresponding to the access point is a charging network; When the WLAN is a charging network, the tariff information further includes: a charging type of the WLAN and/or charging detailed information of the corresponding charging type.

The method according to claim 11, wherein when the WLAN user terminal searches for a network, the access point provides the pre-configured tariff information of the WLAN to the user of the WLAN.

The WLAN user terminal searches for the network day, and the access point provides the pre-configured WLAN tariff information to the WLAN user terminal through a broadcast message.

The method according to claim 11, wherein when the WLAN user terminal searches for a network, the access point provides the pre-configured tariff information of the WLAN to the user terminal of the WLAN as:

After receiving the query message sent by the WLAN user terminal, when the WLAN corresponding to the access point is a non-accounting network, the first response message is returned to the WLAN user terminal; the first response message carries the tariff information of the WLAN, The tariff information of the WLAN includes the WLAN as a non-billing network.

The method according to claim 11, wherein when the WLAN user terminal searches for a network, the access point provides the pre-configured WLAN tariff information to the WLAN user terminal as:

After receiving the query message sent by the WLAN user terminal, the WLAN corresponding to the access point is the 'fee network H inch, and the second response message is sent to the WLAN user terminal; the second response message carries the WLAN tariff information. The tariff information of the WLAN includes charging details of the WLAN, the charging type of the WLAN, the charging type of the WLAN, and the corresponding charging type.

The method according to claim 14, wherein the access point provides the pre-configured tariff information of the WLAN to the WLAN user terminal by using a broadcast message: each access point adds the configured tariff information of the WLAN. In the basic data, a broadcast message carrying the basic data frame is sent.

18. The method of claim 16 wherein:

The second response message is a broadcast protocol message or a transport layer or a negotiation message.

19. The method of claim 18, wherein

The broadcast protocol message is an access network query protocol ANQP message, and a fee detail information element is added in a vendor custom field in the ANQP message. 20. The method of claim 19, wherein

The field indicating the charging type includes a reserved bit, a calculated bit by flow, and/or a calculated bit by time length, and a reserved bit; the value of the reserved bit is 0, and the value of the calculated bit by flow is greater than 0. An integer that is calculated by the time length is an integer greater than zero.

A WLAN user terminal, comprising: a search unit, a display unit, and a selection unit; wherein

a search unit for searching for a WLAN;

The WLAN user terminal according to claim 21, wherein the selecting unit further comprises a first receiving unit and a first selecting subunit;

The first receiving unit, ^ is configured to receive a pre-configured selection rule;

And a first selection subunit, configured to select, according to a selection rule received by the first receiving unit, the accessed WLAN in the tariff information of the plurality of WLANs searched by the display unit.

The WLAN user terminal according to claim 21, wherein the selection unit further comprises a second receiving unit and a second selecting subunit;

a second receiving unit, configured to display the WLAN of the searched WLAN, and receive the WLAN selected by the user according to the tariff information of the WLAN displayed by the display unit;

a second selection subunit, configured to select, according to the WLAN received by the second receiving unit, the accessed WLAN

An access server, comprising: a storage unit and an information providing unit;

a storage unit, where the cost information of the pre-configured WLAN is stored;

An information providing unit, configured to store a storage unit when a WLAN user terminal searches for a network The tariff information of the WLAN is provided to the WLAN user terminal.

The server according to claim 24, wherein the server further comprises: a receiving unit, configured to receive the WLAN selected by the WLAN user terminal.

A system for selecting an access point in a wireless local area network, the system comprising: a WLAN user terminal, an access point;

a WLAN user terminal, configured to search for a WLAN, display the searched WLAN and the tariff information of the WLAN, and select the accessed WLAN according to the tariff information of the WLAN;

The access point is used to provide the WLAN user terminal with the pre-configured WLAN tariff information to the WLAN user terminal.