WO2012155749A1

WO2012155749A1 - Method and apparatus for acquiring user position information in wlan

Info

Publication number: WO2012155749A1
Application number: PCT/CN2012/074235
Authority: WO
Inventors: 黄翔; 潘云波
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-09-16
Filing date: 2012-04-18
Publication date: 2012-11-22
Also published as: CN103002572B; CN103002572A

Abstract

Disclosed is a method and apparatus for acquiring the user position information in a Wireless Local Area Network (WLAN), wherein after an identifier network User Equipment (UE) accesses an Access Service Router (ASR) through a Virtual Access Point (VAP), the ASR sends a position information request to an adjacent Access Point Control to acquire the position information of the UE. With the present invention, in the circumstance of keeping the present deployment and equipment of the WLAN from being changed, the ASR can acquire the information of the Access Point (AP) accessed by the terminal.

Description

Method and device for acquiring location information of wireless local area network users

The present invention relates to the field of mobile communication technologies, and in particular, to a method and apparatus for acquiring location information of a wireless local area network user. Background technique

In the identity and location separation network (also called the identification network), as shown in Figure 1, the host is the host, and the AID (Access Identifier) is used. The access identifier is the identity identifier. The access service router (ASR) The access router is equipped with a RID (Router Identifier) as the location identifier. All hosts are registered and authenticated by the ASR and access the network. The host accesses the ASR and leaves the ASR. (Identifier and Location Register) Reporting. The ILR stores the mapping relationship between the identity AID of the Host and the RID of the location <AID, RID>. The ILR also provides a response to the query mapping relationship.

The communication between the Host and the Host is encapsulated and routed by the RID on the ASR, and the original packet between the Host and the Host is encapsulated in the Payload. When the packet reaches the destination ASR, the destination ASR decapsulates the packet and then forwards the original packet to the destination host.

The process of forwarding packets in the identity and location network is shown in Figure 2. The process of packet forwarding is as follows: The source ASR (that is, ASR1) performs RID encapsulation on the packet, and then the source ASR and the destination ASR (that is, ASR2). After forwarding the encapsulated packet, the packet is decapsulated on the destination ASR and forwarded to the destination host.

In the packet forwarding process, the encapsulation format of the packet is divided into two types: the original packet and the RID encapsulated packet. The original packet is forwarded: The access layer of the network is separated from the identity and location, that is, the AID is used between the Host and the ASR. The packet is forwarded as the source address and the destination address. The format of the packet is shown in Figure 3.

RID encapsulation packet forwarding: The core layer of the identity and location separation network, that is, the packet forwarding after RID encapsulation between the ASR and the ASR. The packet format is shown in Figure 4.

Due to its low cost and high performance, WLAN (Wireless Local Area Network) has gained a large-scale application and is also the focus of operators'"full-serviceoperation". In the currently deployed WLAN, the wireless management function is controlled by AC (Access Point Control). Execution, the AC can obtain wireless information including the terminal access location.

To deploy an identity and a separate location network on an existing WLAN, you can use a virtual AP (Access Point) to implement incremental deployment, as shown in Figure 5. In this scenario, the ASR does not have any problem in forwarding the packet of the identification network. However, in order to enhance the accurate location service capability of the identification network, the location information of the WLAN user needs to be obtained. Therefore, the following series of problems will occur:

1) In this scenario, the WLAN and the AP do not correspond to each other. The VAP (virtual AP) or VLAN cannot be used to obtain the precise location of the UE. How does the ASR obtain the precise location of the WLAN user;

2) There is no specific interface between the AC and the ASR in the live network. How can the ASR obtain the required information from the AC without changing the AC;

3) The ASR is usually responsible for managing access to the identity network users from different ACs. How does the ASR discover the AC to which the terminal access belongs?

At present, for the above problems, the corresponding solutions are not given in the prior art. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and device for acquiring location information of a wireless local area network user, and obtaining user location information in the identification network without changing the existing WLAN deployment and equipment.

In order to solve the above technical problem, the present invention provides a method for obtaining location information of a wireless local area network user, after the identification network user equipment (UE) is accessed by a virtual access point (VAP) to an access service router (ASR), The ASR sends a location information request to an adjacent access point control (AC) to obtain location information of the UE.

Preferably, the ASR sends the location information request to an adjacent AC by using a protocol message agreed by the two parties, where the protocol message includes at least access location information. The location information request, the SNMP message includes an identifier of the UE, and the PDU of the SNMP message is a Get or GetNext or GetBulk operation.

Preferably, the location information request sent by the ASR includes the following fields:

An identifier field, the identifier field being an identifier of the UE; Accessing the location information field, the access location information field is empty.

Preferably, when receiving the location information request of the ASR, the AC queries the location information of the UE in the maintained wireless management information, and returns the location information to the ASR.

Preferably, the location information of the UE includes information of an access point (AP) accessed by the UE. The present invention also provides an apparatus for acquiring location information of a wireless local area network, which is applied to an identity and location separation network, the apparatus includes an ASR, and the ASR includes a location information acquisition module, and the location information acquisition module is configured to: After the identity network UE is accessed by the VAP, the location information request is sent to the neighboring AC to obtain the location information of the UE.

Preferably, the location information obtaining module is configured to: send the location information request to an adjacent AC by using a protocol message agreed by both the ASR and the AC, where the protocol message includes at least access location information.

Preferably, the location information obtaining module is configured to: send the location information request to an adjacent AC by using an SNMP message, where the SNMP message includes an identifier of the UE, and preferably, the device further Including the location information query module in the AC,

The location information querying module is configured to: when receiving the location information request of the ASR, query the location information of the UE in the maintained wireless management information, and return the location information to the ASR; where the location information of the UE includes Information about the AP accessed by the UE.

The embodiment of the present invention provides a solution for obtaining location information of a WLAN user in the identification network. The location information of the user can be obtained in the identification network without changing the existing WLAN deployment and the device, so that the ASR can learn the connection of the terminal. AP information entered. BRIEF abstract

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:

1 is a schematic diagram of an architecture of an identity and location separation network; 2 is a schematic diagram of a forwarding process of a packet in an identity and location separated network; FIG. 3 is a schematic diagram of an original AID packet;

Figure 4 is a schematic diagram of a RID encapsulated message;

Figure 5 is a schematic diagram of incremental deployment through a virtual AP;

FIG. 6 is a schematic diagram of obtaining WLAN user location information in an identification network according to an embodiment of the present invention; FIG. 7 is a schematic diagram of a packet format of an ASR querying an AC for a UE according to an embodiment of the present invention; FIG. 8 is a schematic diagram of an AC returning to an ASR according to an embodiment of the present invention; Schematic diagram of the packet format of the UE location. Preferred embodiment of the invention

The embodiment provides a method for acquiring location information of a wireless local area network user, and the following technical solutions are used:

After the ARP is accessed by the VAP, the ASR accessed by the UE sends a location information request to the neighboring AC to obtain the location information of the UE.

When receiving the location information request of the ASR, the AC queries the location information of the UE in the maintained wireless management information, and returns the location information to the ASR.

The location information of the UE includes information about an AP accessed by the UE.

Further, the ASR requests the neighboring AC to obtain the information of the AP accessed by the UE in a mutually agreed protocol.

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

Embodiment 1

The process of obtaining the location of the WLAN user in this embodiment is as shown in FIG. 6, which specifically includes the following steps:

Step 1: The UE selects a VAP access corresponding to the identification network.

Corresponding to different UEs, specifically including: Step la, the non-identifying network UE accesses the corresponding VAP, for example:

Two VAPs are generated on the AP. The SSID of the VAP1 used by the common WLAN is VAP-PT, and the SSID of the VAP2 dedicated to the identification network is VAP-BZ. A normal UE can select VAP PT access.

Step 1.b. The identity network UE accesses the corresponding VAP, for example:

Two VAPs are generated on the AP. The SSID of the VAP1 used by the common WLAN is VAP-PT, and the SSID of the VAP2 dedicated to the identification network is VAP-BZ. After the UE subscribes to the identification network, the UE can select VAP-BZ access.

Step 2: The VAP accesses the ASR, such as a VLAN, to the UE in some manner.

Step 2.a, corresponding to the VAP of the ordinary UE, accessing the AC in some way;

Step 2.b, corresponding to the VAP of the identity network UE, accessing the ASR in some way;

For example, the AP and the AC form a VLAN1, which corresponds to a WLAN common UE; the AP and the ASR form a VLAN 2, which corresponds to the identity network UE. VAP1 connects the WLAN common UE to the ACs through VLAN 1. The VAP2 connects the identity network UE to the ASR through VLAN 2.

Step 3: The ASR is aware of the identity of the UE, and obtains the location information of the UE from the neighboring ACs by using a protocol agreed by the two parties, such as an SNMP (Simple Network Management Protocol) or other protocol.

Specifically, after the ASR discovers that the identity network UE accesses, the PDU is an SNMP message of Get or GetNext (Get Next) or GetBulk (Get Batch) operation, and indicates the identifier of the UE in the PDU, and then goes to the adjacent AC. Get information on which AP the UE is accessing.

For example, the PDU is set to the ID in the Variable bindings in GetNext.

The MAC of the UE, as the query key value, the value of the location field to be obtained is set to 0.

Step 4: After receiving the message sent by the ASR to obtain the location information of the identity network, the ACs queries the database containing the UE access location information according to the UE identifier (such as the MAC of the UE) included in the message.

Specifically, it can pass the management information base MIB in SNMP ( Management Information

Base (MIB for short) finds UE information that matches the UE identifier. In order to maintain the access location information, a node about the access location may be added to the MIB, so that the value of the node that acquires the access location is added in the SNMP message that the PDU is Get or GetNext or GetBulk. For example, AC After the PDU sent by the ASR is an SNMP message of Get or GetNext or GetBulk, the information matching the UE identifier is queried in the MIB according to the UE identifier included in the message PDU.

Alternatively, other forms of database may be used to search for UE information matching the UE identifier. For example, a database entry whose key value is an access location in the database may be added, and the corresponding access may be obtained by querying the entry under the key value. location information.

Step 5: After obtaining the information that matches the UE identifier, the AC returns the location information of the UE to the ASR through a protocol agreed by the two parties, such as an SNMP or other protocol.

For example, the AC fills the UE location information obtained by the query into the Response PDU of the SNMP message, and sends the message to the ASR.

Embodiment 2

The flow of this embodiment is consistent with the flow of the first embodiment. The main difference between the two is that the message format used when obtaining the location information is different.

In this embodiment, the ASR can obtain the UE location information from the AC by using the packet as shown in FIG. 7. Referring to FIG. 7, the packet mainly includes the following information: packet type (Type), length (length), and UE identifier. UE's Identifier and UE's Location Information (UE's Location). For example, the value of the UE's Location field is an initial value or a default value, but is not limited to the form; and the AC can return the UE location information to the ASR by using the packet as shown in FIG. 8, for example, the response packet. The Type field in the field may take a value of (Type+1), and the UE's Location field fills in the access location information of the UE.

In addition, the embodiment of the present invention further provides a device for acquiring location information of a WLAN user, which is applied to an identity and location separation network, where the device mainly includes an ASR, and the ASR further includes a location information acquiring module.

The location information obtaining module is configured to: after the identity network UE is accessed by the VAP, send a location information request to the neighboring AC to obtain the location information of the UE.

Further, the location information acquiring module is configured to send the location information request to an adjacent AC by using a protocol message agreed by the ASR and the AC, where the protocol message includes at least access location information.

Further, the location information acquiring module is configured to use an SNMP message to the adjacent AC. Sending the location information request, the SNMP message includes an identifier of the UE, and the PDU of the SNMP message is a Get or GetNext or GetBulk operation.

Further, the device further includes a location information querying module in the AC, where the location information querying module is configured to: when receiving the location information request of the ASR, query the location information of the UE in the maintained wireless management information, and return And the location information of the UE includes information about an AP accessed by the UE.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Various changes and modifications may be made to the invention, and such changes and modifications are intended to be included within the scope of the appended claims.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

Industrial Applicability The present invention provides a solution for acquiring WLAN user location information in an identification network. The location information of the user can be obtained in the identification network without changing the existing WLAN deployment and equipment, so that the ASR can know. AP information accessed by the terminal.

Claims

Claim

A method for obtaining location information of a wireless local area network user, comprising:

After the identity network user equipment (UE) is accessed by the virtual access point (VAP) to the access service router (ASR), the ASR sends a location information request to the adjacent access point control (AC) to obtain the Location information of the UE.

2. The method of claim 1 wherein

The ASR sends the location information request to an adjacent AC by using a protocol message agreed by the two parties, where the protocol message includes at least access location information.

3. The method according to claim 1, wherein, in the information request, the SNMP message includes an identifier of the UE, and a protocol data unit (PDU) of the SNMP message is a Get or GetNext or GetBulk operation.

4. The method of claim 1, wherein

The location information request sent by the ASR includes the following fields:

An identifier field, the identifier field being an identifier of the UE;

Accessing the location information field, the access location information field is empty.

5. The method of claim 1, 2, 3 or 4, wherein

6. The method of claim 5, wherein

The location information of the UE includes information of an access point (AP) accessed by the UE.

A device for acquiring location information of a wireless local area network, which is applied to an identity and location separation network, the device includes an ASR, and the ASR includes a location information acquisition module.

8. The apparatus according to claim 7, wherein The location information obtaining module is configured to: send the location information request to an adjacent AC by using a protocol message agreed by the ASR and the AC, where the protocol message includes at least access location information.

9. The apparatus according to claim 7, wherein

The location information obtaining module is configured to: send the location information request to an adjacent AC by using an SNMP message, where the SNMP message includes an identifier of the UE, and the PDU of the SNMP message is Get or GetNext or GetBulk operating.

10. The device according to claim 7, 8 or 9, wherein the device further comprises a location information query module in the AC,