CN102160400A - Method, equipment for acquiring information needed to locate mobile terminal - Google Patents

Abstract

The present invention provides a technical solution for assisting a network server to acquire the information needed to locate a mobile terminal in an access equipment. After receiving the network connection request message from the mobile terminal, the access equipment determines the access loop information of the mobile terminal, and reports the access loop information of the mobile terminal to the network server so that the network server can locate the mobile terminal based on the information. By using the method and equipment provided by the present invention, the network server, especially the address allocation server which is a Dynamic Host Configuration Protocol (DHCP) server, can know the information needed to locate a mobile terminal no matter how the mobile terminal moves, thereby can enable accurate locating of the mobile terminal.

Description

Used to obtain the location of the mobile terminal

Method and apparatus for required information Technical field

The present invention relates to an access device and a network server in a communication network, and in particular to a method and a device for assisting a network server in the access device to obtain information required for positioning a mobile terminal, and for obtaining information required for positioning a mobile terminal in the network server. Method and apparatus for locating required information. Background technique

With the rapid development of technology, the trend of Fixed Mobile Convergence (FMC) becomes more and more obvious, and the wireless local area network has been widely used in the access network. Network operators have also begun to vigorously deploy wireless local area networks in access networks to provide public wireless access services for mobile terminals. If the access network of the network operator is to provide mobility for the mobile terminal, no matter which wireless access point the mobile terminal is in, it should be visible to the network operator. This means that whether the mobile terminal can access the network to enjoy the service through the wireless access point should be controlled by the network operator. Since the wireless access point is generally placed in the customer premises network, it is considered unsafe from the perspectives of the mobile terminal and the network operator.

At present, a centralized WLAN architecture proposed by the IETF-based Control and Configuration Protocol for Wireless Access Points (CAPWAP, RFC3990) is a technical solution to solve the above-mentioned security problems. Its network topology structure diagram is shown in FIG. 1, wherein, the wireless access point 12 realizes the function of thin AP (or called "WTP" or smart antenna), and the wireless control function (AC) is realized by the access device 14 . The Public WLAN that provides network access services for mobile terminals is controlled by the access device 14 controlled by the operator (of course, the user's Private WLAN is controlled by the user himself).

In the network topology shown in FIG. 1, the access device 14 (including 14-1 and 14-2) inserts the option 82 into the DHCP address allocation request message sent when each mobile terminal 11 is started, to notify The access loop information of the mobile terminal 11 in the DHCP address assignment server 19, that is, which access device the mobile terminal passes through and which access device Which slot and which port of the device is connected to the network. Usually, when the network operator deploys the network, which geographical area each port of each slot of each access device corresponds to is planned in advance and stored in the DHCP server 19. The DHCP server extracts and stores the access loop information of each mobile terminal 11 from the DHCP address allocation request message, and then uses the access loop information to locate each mobile terminal 11.

In order to support the mobility of the mobile terminal 11, IEEE 802.11r stipulates the protocol standard for the mobile terminal 11 to switch between different WLAN-access points, so that the mobile station can scenario) to quickly switch between different WLAN access points. At this time, a problem caused is that the access loop information mapping table in the DHCP server 19 is not updated, and the DHCP server 19 cannot use the access loop information stored therein to locate the mobile terminal. Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention proposes a technical solution for assisting the network server in the access device to obtain the information required for positioning the mobile terminal. After the access device receives the network connection request message from the mobile terminal, Determine the access loop information of the mobile terminal, and report the access loop information of the mobile terminal to the network server, so that the network server can locate the mobile terminal accordingly.

According to the first aspect of the present invention, there is provided a method for assisting a network server in obtaining information required for positioning a mobile terminal in an access device of an access network, which is characterized in that it includes the following steps: a. A network connection request message of the mobile terminal, where the network connection request message includes the identifier of the mobile terminal; b. According to the port position at which the access device receives the network connection request message, determine the access of the mobile terminal loop information; c. sending a notification message to the network server, the notification message including the access loop information of the mobile terminal and the identifier of the mobile terminal.

According to a second aspect of the present invention, there is provided a method for obtaining information required for positioning a mobile terminal in a network server of a communication network, characterized in that it includes the following steps: - receiving a notification from an access device message, the notification message includes the access loop information of the mobile terminal and the identification information of the mobile terminal; - according to the mobile terminal The access loop information and identification information are used to establish or update the access loop information mapping table, and the access loop information mapping table is used to locate the mobile terminal.

According to a third aspect of the present invention, there is provided an assisting device for assisting a network server in obtaining information required for positioning a mobile terminal in an access device of an access network, wherein the device includes a first receiving means, determining means and first sending means. Wherein, the first receiving means is used to receive the network connection request message from the mobile terminal, and the network connection request message includes the identifier of the mobile terminal; the determining means is used to receive the network connection request message according to the access device The port position of the mobile terminal is determined to determine the access loop information of the mobile terminal; the first sending means is used to send a notification message to the network server, and the notification message includes the access loop information of the mobile terminal and the identification of the mobile terminal .

According to a fourth aspect of the present invention, there is provided an obtaining device for obtaining information required for positioning a mobile terminal in a network server of a communication network, wherein the obtaining device includes a second receiving device, establishing or Update device. Wherein, the second receiving means is used to receive a notification message from the access device, the notification message includes the access loop information of the mobile terminal and the identification information of the mobile terminal; The access loop information and the identification information are used to establish or update the access loop information mapping table, and the access loop information mapping table is used to locate the mobile terminal.

By using the method and device of the present invention, no matter how the mobile terminal moves, the network server, especially the address allocation server such as the DHCP server, can obtain the information required for locating the mobile terminal, thereby accurately locating the mobile terminal. Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a network topology structure according to a specific embodiment of the present invention; Fig. 2 is a diagram of an access device assisting a network server in obtaining information required for positioning a mobile terminal in a communication network according to a specific embodiment of the present invention System flow diagram; Fig. 3a is in TCP/IP communication network according to a specific embodiment of the present invention When the mobile terminal is initially started, the access device assists. A system flow chart of the network server obtaining the information required for positioning the mobile terminal;

FIG. 3b is another system flow diagram of an access device assisting a network server in obtaining information required for positioning a mobile terminal in a TCP/IP communication network when the mobile terminal is initially started according to a specific embodiment of the present invention;

FIG. 4 is another system flow diagram of the access device assisting the network server in obtaining the information required for positioning the mobile terminal when the mobile terminal is switched in the TCP/IP communication network according to a specific embodiment of the present invention;

FIG. 5 is a structural block diagram of an assisting device 500 for assisting a network server in obtaining information required for positioning a mobile terminal in an access device of an access network according to a specific embodiment of the present invention;

FIG. 6 is a structural block diagram of an acquisition device 600 for acquiring information required for positioning a mobile terminal in a network server of a communication network according to a specific embodiment of the present invention;

Wherein, the same or similar reference numerals represent the same or similar step features or devices (modules). Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a network topology diagram according to a specific embodiment of the present invention. Wherein, the mobile terminal 11 accesses the network through the wireless access point 12 (including 12-1, 12-2 and 12-3, etc.). The wireless access point 12 is connected to the access device 14 (including 14-1 and 14-2, etc.) through a digital subscriber line (DSL) modulator or directly. Access devices 14 are connected through edge routers 15. In the operator's (NSP) network, it includes AAA server 17, network management system 18, network server 10 and address allocation server 19, etc.

In the prior art, the DHCP server 19 obtains the access loop information of the mobile terminal 11 from the DHCP address assignment request message from the mobile terminal 11, and uses the access loop information to locate the mobile terminal 11. In the present invention, it is not limited to obtain the access loop information by the DHCP server 19 so as to locate the mobile terminal 11, any network server 10 can obtain the access loop information of the mobile terminal 11 so as to locate the mobile terminal 11, and the network server can be located in the network of the operator, or in the network of the Internet content service provider (ICP), according to the positioning It depends on the actual application. For example, network advertisers can use the network server 10 to send targeted advertisements to the mobile terminal's positioning function; operators can use the network server 10 to send targeted weather forecasts to the mobile terminal's positioning function.

Fig. 2 shows a system flow chart according to a specific embodiment of the present invention. The process in which the access device shown in FIG. 2 assists the network server 10 in obtaining information required for positioning the mobile terminal will be described in detail below in conjunction with FIG. 1.

First, in step S201, the access device 14-2 receives a network connection request message from the mobile terminal 11, and the network connection request message includes the identifier of the mobile terminal. As shown in FIG. 1, the mobile terminal 11 first sends the network connection request message to the wireless access point 12-1, and the wireless access point 12-1 then sends the network connection request message to the access device 14-2, and the wireless access point 12-1 sends the network connection request message to the access device 14-2. Entry point 12-1 functions as a simple forwarding.

Then in step S202, the access device 14-2 determines the access loop information of the mobile terminal 11 according to the port position at which the network connection request message is received.

Generally, a large access device has multiple slots (Slots), each slot has multiple ports (Port), and a small access device has multiple ports. The access device 14-2 can determine the access loop information of the mobile terminal according to the port position of the received network connection request message, that is, which port of the access device the mobile terminal accesses through, or the mobile terminal The terminal is accessed through which port of which slot of the access device, that is, the access loop information includes the identification of the access device 14-2 and the line identification of the line through which the access device 14-2 connects the mobile terminal 11 to the network . The line identifier includes the port identifier of the access device 14-2, and in the case that the access device _14-2 has multiple slots, it may further include the slot identifier of the access device 14-2.

Preferably, if one port of the access device 14-2 governs multiple wireless access points, or one wireless access point governs multiple Public WLANs, the access loop information may further include the An identifier of the accessed Public WLAN, that is, an identifier of the wireless network, such as an SSID. The logo of the Public WLAN can be inserted by the wireless access point 12-1 into the network connection request message from the mobile terminal 11, or may also be inserted into the network connection request message by the mobile terminal 11 itself.

In step S203, the access device-2 sends a notification message to the network server 10, and the notification message includes the access loop information of the mobile terminal 11 and the identification of the mobile terminal 11. The identifier of the mobile terminal 11 includes any identifier that can uniquely identify the mobile terminal, such as a data link layer address, a network layer address, and the like. For a TCP/IP network, the data link layer address is the MAC address, and the network layer address is the IP address.

Finally, in step S204, the network server 10 establishes or updates an access loop information mapping table according to the access loop information and identification information of the mobile terminal 11 included in the notification message, and the access loop information mapping table is used for Locate the mobile terminal. An example of the access loop information mapping table is shown in the following table.

Table 1 Access loop information mapping table

It should be noted that there are two columns of mobile terminal identifiers in Table 1. In actual use, only one column of mobile terminal identifiers may be reserved, or two columns of mobile terminal identifiers may be used as required.

Preferably, in the process shown in FIG. 2, after step S201, that is, after the access device 14-2 receives the network connection request message from the mobile terminal 11, the access device 14-2 determines whether the mobile terminal 11 is allowed to access to the network, if the mobile terminal 11 is allowed to access the network, step S202 will be executed again.

Preferably, there are many criteria for the access device 14-2 to determine whether to allow the mobile terminal 11 to access the network. For example, if some wireless access points only serve high-priority users, it may also reject low-priority mobile Terminal access, or congestion on the network side, may also reject the access of the new mobile terminal, or the number of terminals served by the access device or wireless access point may reach the maximum limit, or the access of the new mobile terminal may be rejected , or the mobile terminal The client does not have permission to access the network.

In the wireless access process based on the 80 ² .11 protocol, the network connection request message in the above process includes at least an association request message and a re-association request message. These two kinds of messages respectively correspond to the situation of the mobile terminal 11 initially starting up and moving from the coverage area of one wireless access point to the coverage area of another wireless access point.

When the mobile terminal 11 is initially started, the network server 10 obtains the access loop information of the mobile terminal 11 at least in the following two ways.

One is that the access device 14-2 inserts the access loop information of the mobile terminal 11 into the address allocation request message received from the mobile terminal 11, and the address allocation server 19 extracts the information from the address allocation request message after receiving the address allocation request message. The access loop information of the mobile terminal 11 is stored, and then the access loop information of the mobile terminal 11 is sent to the network server 10 . This method is suitable for those mobile terminals 11 that obtain the network address through the network.

The other is that after receiving the association request message from the mobile terminal 11, the access device 14-2 determines the access loop information of the mobile terminal 11 according to the port position of the received association request message, and then sends a notification message to For the network server 10, the notification message includes the access loop information of the mobile terminal 11 and the identifier of the mobile terminal 11. At this time, the mobile terminal 11 has not obtained an IP address, and the identifier of the mobile terminal 11 is a MAC address. This method is applicable to both the mobile terminal 11 having a static network address and the mobile terminal 11 obtaining a network address through the network.

For those mobile terminals 11 that obtain network addresses through the network, the above two methods can be used alone or in combination.

Taking a communication network based on the TCP/IP protocol (hereinafter referred to as "TCP/IP network") as an example, Figure 3a and Figure 3b show the flow charts of the above two methods respectively. For a TCP/IP network, the network address is also IP address: Address assignment server 19 includes an address assignment server based on Dynamic Host Configuration Protocol (DHCP).Address assignment request messages include DHCP discovery (DHCP-DISCOVER) messages and DHCP request (DHCP-REQUEST) messages in the DHCP address assignment protocol.

The process shown in FIG. 3a will be described in detail below in conjunction with FIG. 1.

First, in step S301, the mobile terminal 11 and the wireless access point 12-1 pass Beacon/probe signaling executes a scanning (Scanning) process.

Next, in step S302, a network and service discovery process is performed between the mobile terminal 11, the access device 14-2 and the resource manager in the operator's network (for the sake of simplicity, not shown in FIG. 1 and FIG. 3 ) .

In step S303, the mobile terminal 11 performs an authentication process (Open System Authentication in 802.11 authentication) with the access device 14-2 via the wireless access point 12-1.

After the authentication is successful, in step S304, the mobile terminal 11 performs an association process with the access device 14-2. The mobile terminal 11 sends an association request message to the access device 14-2, and the access device 14-2 sends an association response message to the mobile terminal 11 after receiving the association request message.

Next, in step S305, the mobile terminal 11 performs the 802.1x EAP authentication and key exchange process with the access device 14-2 and the AAA server in the NSP network.

Finally, in step S306, the mobile terminal 11 acquires various configuration parameters from the DHCP server 19 of the NSP network, including the IP address and the like. Specifically, the access device ^14-2 determines the access loop information of the mobile terminal 11 according to the port position of the received DHCP address allocation request message ^from the mobile terminal 11, and in the received The access loop information of the mobile terminal 11 is inserted into the DHCP address assignment request message of the mobile terminal 11.

In step S308, after receiving the DHCP address assignment request message from the mobile terminal 11, the DHCP server 19 extracts the access loop information of the mobile terminal 11 and sends it to the network server 10.

Then, in step S309, after obtaining the access loop information of the mobile terminal 11, the network server 10 creates or updates the access loop information mapping table, so as to locate the mobile terminal according to the access loop information mapping table.

The flow shown in FIG. 3a has been described in detail above, and the flow shown in FIG. 3b will be described in detail below.

Steps S301 to S305 in FIG. 3b are the same as the steps in FIG. 3a, and will not be repeated here. Successfully complete 802.1xEAP authentication between the access device 14-2 and the mobile terminal 11 After exchanging with the key, in step S307, the access device 14-2 determines the access loop information of the mobile terminal 11 according to the port position of the received message such as the association request message from the mobile terminal 11, and sends a notification message to the network server 10, the notification message includes the access loop information of the mobile terminal 11 and the identification of the mobile terminal 11, for those mobile terminals 11 that need a DHCP server to assign an IP address, the IP address has not been obtained at this time, and the identification is MAC address. For those mobile terminals 11 with static IP addresses, the identifier can be an IP address or a MAC address.

Similarly, after the network server 10 receives the notification message, in step S309, according to the access loop information of the mobile terminal 11 in the notification message, the access loop information mapping table is established or updated, so that according to the access loop The information mapping table locates the mobile terminal.

It should be noted that, among them, steps S301 to S306 shown in FIG. 3a and FIG. 3b all include one or more interaction processes, steps S301 to S305 are all existing technologies, and the detailed processes of steps S301 to S305 can be References: CAPWAP Protocol Binding for IEEE 802.11 page 7 and 802.11-2007 protocol page 44, for the interaction process of DHCP messages in step S306, refer to the DHCP protocol (RFC2131, etc.), and the present invention will not repeat them here.

Another thing to be explained is that the flowchart shown in FIG. 3b is only a schematic diagram, and does not necessarily constitute a restriction on the sequence of the various steps therein. In actual use, it can be adjusted as needed. Wherein, there is no necessary sequence relationship between steps S307, S309 and steps S304 and S305, steps S307, S309 and steps S304 and S305 are executed in no particular order, and can be executed at the same time, or the first two steps S303 and S305 can be executed first S304. Steps S307 and S309 may also be performed first.

For example, step S304 in FIG. 3b includes two substeps S3041 and S3042 (for simplicity, not shown in FIG. 3a and FIG. 3b): S3041: The mobile terminal 11 sends an association request message to the access device 14-2, S3042: The access device 14 - 2 sends an association response message to the mobile terminal 11 .

At this time, step S307 and step S3042 are executed in no particular order, either step S307 and step S3042 can be executed at the same time; step S307 can also be executed first, and then step S3042 can be executed; or step S3042 can be executed first, and then step S307 can be executed . When the mobile terminal 11 moves from the coverage area of one wireless access point to the coverage area of another wireless access point, for example, moving from the coverage area of the wireless access point 12-1 in FIG. 1 to the wireless access point 12 -3, the access loop information of the mobile terminal 11 changes, and the access loop information of the mobile terminal 11 stored in the network server 10 needs to be updated. At this time, the mobile terminal 11 will start the fast handover process according to the 802.11r protocol. After receiving the reassociation request message from the mobile terminal 11, the access device 14-2 determines that the mobile terminal 11 access loop information, and then send a notification message to the network server 10, the notification message includes the access loop information of the mobile terminal 11 and the identifier of the mobile terminal 11. Since the IP address of the mobile terminal 11 does not change during the handover process, the identifier of the mobile terminal 11 may be the IP address of the mobile terminal 11 or the MAC address of the mobile terminal 11.

If when the mobile terminal 11 is initially started, the identifier of the mobile terminal 11 contained in the notification message sent by the access device 14-2 is the MAC address of the mobile terminal 11, then when the mobile terminal 11 switches rapidly, the access device 14-1 The identifier of the mobile terminal 11 included in the sent notification message may be the MAC address of the mobile terminal 11, or may include both the MAC address and the IP address. If when the mobile terminal 11 is initially started, the identification of the mobile terminal 11 contained in the notification message sent by the access device 14-2 is the IP address of the mobile terminal 11, then when the mobile terminal 11 is switched quickly, the access device 14-1 The identifier of the mobile terminal 11 contained in the sent notification message is also the IP address of the mobile terminal 11, or the IP address and the MAC address of the mobile terminal 11. If when the mobile terminal 11 is initially started, the identifier of the mobile terminal 11 contained in the notification message sent by the access device 14-2 is the MAC address and IP address of the mobile terminal 11, then the notification message sent by the access device 14-1 The contained identifier of the mobile terminal 11 may be the IP address or the MAC address or the IP address and the MAC address of the mobile terminal 11 .

According to the flow chart of fast handover based on the basic mode stipulated in the 802.11r protocol, FIG. 4 shows a flow chart when the mobile terminal 11 performs fast handover.

First, in step S401, a successful (secure) session and data communication is performed between the mobile terminal 11 and the wireless access point 12-1.

In step S402, the mobile terminal 11 judges that it must be disconnected from the wireless access point 12-1 Connect to establish a session with the wireless access point 12-3. For example, because the mobile terminal 11 moves from the coverage area of the wireless access point 12-1 to the coverage area of the wireless access point 12-3, the mobile terminal 11 is switched from accessing the network by the wireless access point 12-1 to being switched by the wireless access point 12-1. 12-3 accesses the network, and the mobile terminal 11 judges to establish a session with the wireless access point 12-3 through steps such as scanning and network and service discovery.

In step S403, the mobile terminal 11 sends a re-authentication request message to the wireless access point 12-3. Since the access control function is implemented by the access device 14-1, the wireless access point 12-3 sends the The re-authentication request message is forwarded to the access device 14-1. The access device 14-1 sends a re-authentication response message to the mobile terminal 11 after receiving the re-authentication request message.

In step S404, the mobile terminal 11 sends a reassociation request message to the wireless access point 12-3. Similarly, since the access control function is implemented by the access device 14-1, the wireless access point 12-3 forwards the re-authentication request message from the mobile terminal 11 to the access device 14-1. After receiving the reassociation request message, the access device 14-1 sends a reassociation response message to the mobile terminal 11.

In step S405, the access device 14-1 determines the access loop information of the mobile terminal 11 according to the received reassociation request message from the mobile terminal 11, and sends a notification message to the network server 10. In the notification message, It includes the access loop information of the mobile terminal 11 and the identifier of the mobile terminal 11. At this time, the mobile terminal 11 has obtained an IP address, and the identifier of the mobile terminal 11 may be a MAC address or an IP address.

After the network server 10 receives the notification message, in step S406, it establishes or updates the access loop information mapping table according to the access loop information of the mobile terminal 11 in the notification message, so as to map The table locates the mobile terminal.

Finally, in step S407, the 802.lx port between the mobile terminal 11 and the wireless access point 12-3 is opened, and the mobile terminal 11 and the wireless access point 12-3 directly perform successful (secure) sessions and data transmission .

It should be noted that, among them, steps S401 to S404 and step S407 shown in FIG. 4 all include one or more interactive processes, steps S401 to S404 and step S407 are all existing technologies, and details can be referred to IEEE802.11r , IEEE802.il-2007 protocol and document CAPWAP Protocol Binding for IEEE 802.11 page 7 etc., the present invention is in This will not be repeated here.

Another thing to be explained is that the flowchart shown in FIG. 4 is only a schematic diagram, and does not necessarily constitute a restriction on the sequence of the various steps therein. In actual use, it can be adjusted as needed. Wherein, steps S405, S406 and step S407 are executed in no particular order, they can be executed at the same time, or the first two steps S405 and S406 can be executed first, or step S407 can be executed first.

Wherein, step S404 includes two sub-steps S4041 and S4042 (for simplicity, not shown in FIG. 4): S4041: The mobile terminal 11 sends an association request message to the access device 14-1, S4042: The access device 14-1 Send an association response message to the mobile terminal 11.

At this time, step S405 and step S4042 are executed in no particular order, and step S405 and step S4042 can be executed simultaneously; step S405 can also be executed first, and then step S4042 can be executed; or step S4042 can be executed first, and then step S405 can be executed .

It should be noted that the network server 10 and the DHCP server 19 may also be the same physical device, that is, in the processes shown in FIG. 3a, FIG. 3b and FIG. 4, the network server 10 is the DHCP server. In Fig. 4, if the network server 10 is a DHCP server 19, the format of the notification message sent by the access device 14-1 to the DHCP server 19 can be the format of a DHCP INFORM message, after the DHCP server 19 receives the DHCP INFORM message , extract the access loop information of the mobile terminal 11 from it, and send a DHCP ACK message to the access device 14-1, and after receiving the DHCP ACK message, the access device 14-1 discards it directly and does not continue to forward it to the mobile terminal 11. Terminal 11.

The flow of the system method of the present invention has been described in detail above, and the working process of the device of the present invention will be described in detail below in conjunction with FIG. 5 and FIG. 6 .

FIG. 5 shows a structural block diagram of an assisting device 500 in an access device of an access network for assisting a network server in obtaining information required for positioning a mobile terminal according to a specific embodiment of the present invention. Wherein, the assisting device 500 includes a first receiving device 501, a determining device 502, a first sending device 503, a judging device 504 and an inserting device 505. Those skilled in the art should be able to understand that only the first receiving device 501, the first determining device 502 and the determining device 503 are necessary devices for implementing the present invention, and other devices are optional devices. 009 000030

The process of assisting the network server 10 to obtain the information required for positioning the mobile terminal 11 by the assisting device 500 located in the access device 14-1 or 14-2 will be described in detail below in conjunction with FIG. 1 .

First, the first receiving means 501 receives a network connection request message from the mobile terminal 11, and the network connection request message includes the identifier of the mobile terminal 11. The identifier of the mobile terminal 11 includes any identifier that can uniquely identify the mobile terminal, such as a data link layer address, a network layer address, and the like. For a TCP/IP network, the data link layer address is the MAC address, and the network layer address is the IP address.

Then, the determining means 502 determines the access loop information of the mobile terminal 11 according to the port position of the network connection request message received by the access device 14-1 or 14-2.

Generally, a large access device has multiple slots (Slots), and each slot has multiple ports (Ports), and a small access device has multiple ports. Taking the access device 14-2 as an example, the access device 14-2 can determine the access loop information of the mobile terminal according to the port position of the received network connection request message, that is, which access loop information the mobile terminal passes through. Which port of the device is accessed, or the mobile terminal is accessed through which port of which slot of the access device, that is, the access loop information includes the identifier of the access device 14-2 and the access device' 14-2 will The line identifier of the line through which the mobile terminal 11 accesses the network. The line identifier includes the port identifier of the access device 14-2, and if the access device 14-2 has multiple slots, it may further include the slot identifier of the access device 14-2.

Preferably, if one port of the access device 14-2 has multiple wireless access points, or one wireless access point has multiple Public WLANs, the access loop information may further include the An identifier of the Public WLAN, that is, an identifier of a wireless network, such as an SSID. The public WLAN identifier can be inserted into the network connection request message from the mobile terminal 11 by the wireless access point 12-1, or can also be inserted into the network connection request message by the mobile terminal 11 itself.

Finally, the first sending means 503 sends a notification message to the network server 10, and the notification message includes the access loop information of the mobile terminal 11 and the identifier of the mobile terminal 11.

Taking the receiving device 14-2 as an example, preferably, after the first receiving means 501 receives, that is, the access device 14-2 receives the network connection request message from the mobile terminal 11, the judging means 504 judges whether the mobile terminal 11 is allowed to access to the network, if the mobile terminal 11 is allowed to access the network, then the determination means 502 and the first sending means 503 perform the determination and execution process respectively. Or the execution of the judging step by the judging means 504 may also be implemented after the determining means ⁵⁰² executes the determining step and before the first sending means 503 executes the sending step.

Preferably, the judging means 504 has many criteria for judging whether to allow the mobile terminal 11 to access the network. For example, if some wireless access points only serve high-priority users, it is also possible to reject the access of low-priority mobile terminals. access of the new mobile terminal may be rejected, or the number of terminals served by the access device or wireless access point reaches the maximum limit, or the access of the new mobile terminal may be rejected, or the Mobile terminals do not have permission to access the network.

In the wireless access process based on the 802.11 protocol, the above-mentioned network connection request message includes at least an association request message and a re-association request message. These two kinds of messages respectively correspond to the situation of the mobile terminal 11 initially starting and moving from the coverage area of one wireless access point to the coverage area of another wireless access point.

When the mobile terminal 11 is initially started, the ways in which the assisting device 500 assists the network server 10 in obtaining the access loop information of the mobile terminal 11 include at least the following two ways.

The first one is as follows: First, the first receiving means 501 receives the address allocation request message from the mobile terminal 11; the inserting means 505 inserts the access loop information of the mobile terminal 11 into the received address allocation request message from the mobile terminal 11 , and then the first sending means 503 sends the address assignment request message inserted into the access loop information to the address assignment server 19 . After receiving the address allocation request message, the address allocation server 19 extracts the access loop information of the mobile terminal 11 and stores it, and then sends the access loop information of the mobile terminal 11 to the network server 10.

Preferably, for a TCP/IP network, the address allocation server 19 includes a DHCP address allocation server. The address allocation request message includes a DHCP discovery (DHCP-DISCOVER) message and a DHCP request (DHCP-REQUEST) message in the DHCP address allocation protocol.

The second one is as follows: After the first receiving device 501 receives the association of the mobile terminal 11 request message or re-association request message, according to the port position of the received association request message or re-association request message, determining means 502 determines the access loop information of the mobile terminal 11, and then the first sending means 503 sends a notification message to For the network server 10, the notification message includes the access loop information of the mobile terminal 11 and the identifier of the mobile terminal 11. At this time, the mobile terminal 11 has not obtained an IP address, and the identifier of the mobile terminal 11 is a MAC address.

The above two methods can be used alone or in combination.

FIG. 6 shows a structural block diagram of an acquisition device 600 used in a network server of a communication network to acquire information required for positioning a mobile terminal according to a specific embodiment of the present invention. Wherein, the obtaining means 600 includes a second receiving means 601, an establishing or updating means 602 and an extracting means 603. According to the teaching of this specification, those skilled in the art should understand that only the second receiving device 601 and the establishing or updating device 602 are necessary devices for implementing the present invention, and the extracting device 603 is an optional device.

Referring to FIG. 1 below, the process of obtaining the information required for positioning the mobile terminal 11 by the obtaining device 600 in the network server 10 will be described in detail.

First, the second receiving module 601 receives a notification message from the access device 14-1 or 14-2, and the notification message includes the access loop information of the mobile terminal 11 and the identification information of the mobile terminal 11. Then, the establishing or updating means 602 establishes or updates an access loop information mapping table according to the access loop information and identification information of the mobile terminal 11, and the access loop information mapping table is used for positioning the mobile terminal.

The identifier of the mobile terminal 11 includes any identifier that can uniquely identify the mobile terminal, such as a data link layer address, a network layer address, and the like. For a TCP/IP network, the data link layer address is the MAC address, and the network layer address is the IP address.

The access loop information includes the identifier of the access device 14-1 or 14-2 and the line identifier of the line in the access device 14-1 or 14-2 that connects the mobile terminal 11 to the network, or the access loop information includes The identification of the access device 14-1 or 14-2, the line identification of the line in the access device 14-1 or 14-2 that will allow the mobile terminal to access the network, and the identification of the wireless network that the mobile terminal 11 seeks to access. An example of the access loop information mapping table is shown in Table 1.

Preferably, if the network server 10 is the address allocation server 19, the second receiving Device 601 also receives an address allocation request message from mobile terminal 11, where the address allocation request message includes identification information and access loop information of mobile terminal 11. Then, the 'extracting means 603 extracts the identification information and access loop information of the mobile terminal 11 from the address allocation request message. The establishing or updating means 602 establishes or updates the access loop information mapping table according to the access loop information and identification information of the mobile terminal 11 extracted by the extracting means 603.

Preferably, for a TCP/IP network, the address allocation server 19 includes a DHCP address allocation server. The address allocation request message includes a DHCP discovery (DHCP-DISCOVER) message and a DHCP request (DHCP-REQUEST) message in the DHCP address allocation protocol, and the notification message sent by the access device 14 to the network server 10 includes a DHCP INFORM message.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various variations or modifications within the scope of the appended claims. The technical scheme of the present invention can be realized by software or hardware.

Claims (30)

Claims 1. A method for assisting a network server in obtaining information required for positioning a mobile terminal in an access device of an access network, comprising the following steps: a. receiving a network connection request message from the mobile terminal, where the network connection request message includes the identifier of the mobile terminal; b. Determine the access loop information of the mobile terminal according to the port position at which the access device receives the network connection request message; c. Sending a notification message to the network server, where the notification message includes the access loop information of the mobile terminal and the identifier of the mobile terminal. 2. The method according to claim 1, further comprising the following steps before step c: - judging whether the mobile terminal is allowed to access the network; Said step c also includes the following steps: - if the mobile terminal is allowed to access the network, then according to the network connection request message, send the notification message to the network server, where the notification message includes the access loop information of the mobile terminal and the The identification of the mobile terminal. 3. The method according to claim 1 or 2, wherein the network server includes an address allocation server, and the method further includes the following steps: - receiving an address assignment request message from a mobile terminal; - inserting the access loop information of the mobile terminal into the address allocation request message to obtain an address allocation request message including the access loop information; - sending the address allocation request message including access loop information to the address allocation server. 4. The method according to claim 1 or 2, wherein the network reconnection request message includes a reassociation request message based on the 802.1lr protocol. 5. The method according to claim 1 or 2, wherein the access loop information includes the identity of the access device and the line identity of the line in the access device that connects the mobile terminal to the network. 6. The method according to claim 5, wherein the network access request message further includes an identifier of the wireless network that the mobile terminal requests to access, and the access loop information further includes the The identifier of the wireless network that the mobile terminal requests to access. 7. The method according to claim 1 or 2, wherein the identifier of the mobile terminal includes a network layer address or a data link layer address of the mobile terminal. 8. The method according to claim 1 or 2, wherein the network server includes an address allocation server. 9. The method according to claim 8, wherein the address allocation server comprises an address allocation server based on Dynamic Host Configuration Protocol, and the notification message comprises a notification message in Dynamic Host Configuration Protocol. 10. A method for obtaining information required for positioning a mobile terminal in a network server of a communication network, comprising the following steps: - receiving a notification message from the access device, where the notification message includes the access loop information of the mobile terminal and the identification information of the mobile terminal; - Establishing or updating an access loop information mapping table according to the access loop information and identification information of the mobile terminal, where the access loop information mapping table is used to locate the mobile terminal. 11. The method according to claim 10, wherein the network server comprises an address allocation server, and the method further comprises the following steps: - receiving an address allocation request message from the mobile terminal, where the address allocation request message includes identification information and access loop information of the mobile terminal; - extracting the identification information and access loop information of the mobile terminal from the address allocation request message; - Establishing or updating the access loop information mapping table according to the extracted access loop information and identification information of the mobile terminal. 12. The method according to claim 10 or 11, wherein the access loop information includes the identification of the access device and the line identification of the line in the access device that connects the mobile terminal to the network, Or the access loop information includes the identification of the access device, the line identification of the line in the access device that connects the mobile terminal to the network, and the The identifier of the wireless network that the mobile terminal requests to access. 13. The method according to claim 10 or 11, wherein the identifier of the mobile terminal includes a network layer address or a data link layer address of the mobile terminal. 14. The method according to claim 10, wherein the network server comprises an address allocation server. 15. The method according to claim 10, wherein the address allocation server comprises an address allocation server based on Dynamic Host Configuration Protocol, and the notification message comprises a notification message in Dynamic Host Configuration Protocol. 16. An assisting device for assisting a network server in obtaining information required for positioning a mobile terminal in an access device of an access network, characterized in that it includes: The first receiving means is configured to receive a network connection request message from the mobile terminal, where the network connection request message includes the identifier of the mobile terminal; a determining device, configured to determine the access loop information of the mobile terminal according to the port position at which the access device receives the network connection request message; The first sending means is configured to send a notification message to the network server, where the notification message includes the access loop information of the mobile terminal and the identifier of the mobile terminal. 17. The assisting device according to claim 16, further comprising: a judging device, configured to judge whether the mobile terminal is allowed to access the network; If the judging means judges that the mobile terminal is allowed to access the network, the first sending means is further configured to: - sending the notification message to the network server, where the notification message includes the access loop information of the mobile terminal and the identifier of the mobile terminal. 18. The assisting device according to claim 16 or 17, wherein the network server includes an address allocation server, and the first receiving device is further used for: - receiving an address assignment request message from a mobile terminal; Among them, also include: inserting means, configured to insert the access loop information of the mobile terminal into the address allocation request message, so as to obtain an address allocation request message including the access loop information; The first sending device is also used for: - Sending the address assignment request message containing the access loop information to the address assignment server. 19. The assisting device according to claim 16 or 17, wherein the network reconnection request message includes a reassociation request message based on the 802.1lr protocol. 20. The assisting device according to claim 16 or 17, wherein the access loop information includes the identification of the access device and the line identification of the line in the access device that connects the mobile terminal to the network . 21. The assisting device according to claim 20, wherein the network access request message further includes an identifier of the wireless network that the mobile terminal requests to access, and the access loop information further includes the The identifier of the wireless network that the mobile terminal requests to access. 22. The assisting device according to claim 16 or 17, wherein the identifier of the mobile terminal includes a network layer address or a data link layer address of the mobile terminal. 23. The assisting device according to claim 16 or 17, wherein the network server includes an address allocation server. 24. The assisting device according to claim 23, wherein the address allocation server comprises an address allocation server based on Dynamic Host Configuration Protocol, and the notification message comprises a notification message in Dynamic Host Configuration Protocol. 25. An acquisition device for acquiring information required for positioning a mobile terminal in a network server of a communication network, comprising: The second receiving means is configured to receive a notification message from the access device, where the notification message includes the access loop information of the mobile terminal and the identification information of the mobile terminal; The establishing or updating means is used for establishing or updating an access loop information mapping table according to the access loop information and identification information of the mobile terminal, and the access loop information mapping table is used for positioning the mobile terminal. 26. The obtaining device according to claim 25, wherein the network server includes an address allocation server, and the second receiving device is further used for: - receiving an address allocation request message from the mobile terminal, where the address allocation request message includes identification information and access loop information of the mobile terminal; Among them, also include: Extracting means, configured to extract the identification information and access loop information of the mobile terminal from the address allocation request message; Said establishing or updating means is also used for: - Establishing or updating the access loop information mapping table according to the extracted access loop information and identification information of the mobile terminal. 27. The obtaining device according to claim 25 or 26, wherein the access loop information includes an access device identifier and a line identifier of a line in the access device that connects the mobile terminal to the network, or The access loop information includes an access device identifier, a line identifier of a line in the access device that allows the mobile terminal to access the network, and an identifier of the wireless network that the mobile terminal requests to access. 28. The obtaining device according to claim 25 or 26, characterized in that the identifier of the mobile terminal includes a network layer address or a data link layer address of the mobile terminal. 29. The obtaining device according to claim 25, wherein the network server includes an address allocation server. 30. The obtaining device according to claim 25, wherein the address allocation server comprises an address allocation server based on Dynamic Host Configuration Protocol, and the notification message comprises a notification message in Dynamic Host Configuration Protocol.