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Method and device for obtaining IP address of mobile terminal

An IP address and mobile terminal technology, applied in the field of communication, can solve the problems that the TTG solution cannot solve the mobility management problems of WLAN networks and 2G/3G networks, the mobile terminal has high requirements, and does not have forward compatibility, etc. Effects of mobility management issues

Inactive Publication Date: 2011-06-29
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the TTG scheme, when the mobile terminal accesses the WLAN network, the WLAN network selects a GGSN for the mobile terminal, and records the IP address of the mobile terminal in the GGSN; and when the mobile terminal switches from the WLAN network to 2G / 3G When connecting to the Internet, the 2G / 3G network will re-select the GGSN for the mobile terminal, and the newly selected GGSN will re-allocate the IP address for the mobile terminal, resulting in the IP address used by the mobile terminal in the WLAN network and the IP address used by the mobile terminal in the 2G / 3G network. Inconsistent, so mobility management between WLAN network and 2G / 3G network cannot be realized
[0006] To sum up, in the current technology, when a mobile terminal switches between a WLAN network and a 2G / 3G network, if the mobility management scheme defined in TS23.327 is followed, the requirements for the mobile terminal are high and there is no previous direction compatibility; if the TTG scheme defined in TS23.234 is followed, the TTG scheme cannot solve the mobility management problems of WLAN networks and 2G / 3G networks

Method used

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  • Method and device for obtaining IP address of mobile terminal
  • Method and device for obtaining IP address of mobile terminal
  • Method and device for obtaining IP address of mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 2 As shown, it is a schematic diagram of a method for obtaining an IP address of a mobile terminal in Embodiment 1 of the present invention, and the method includes the following steps:

[0030] Step 101: the mobile terminal sends an access request including the terminal identifier to the access network.

[0031] In this embodiment, special APN information is introduced into the IWLAN and 2G / 3G network, and the mobile terminal accesses the network through the APN, and carries corresponding APN information in the access request.

[0032] The current access operation of the mobile terminal to the network may be the first access to the network after the mobile terminal is turned on, that is, access without services; it may also be the access to the second network when the mobile terminal switches from the first network to the second network element operation, that is, it may be access with services.

[0033] Step 102: Send a query request to Domain Name S...

Embodiment 2

[0056] Embodiment 2 of the present invention describes the solution of Embodiment 1 of the present invention in detail through a specific example.

[0057] Assume that in Embodiment 2 of the present invention, the mobile terminal first accesses the WLAN network after being turned on, and after a period of time, the mobile terminal roams to the 3G network.

[0058] The second embodiment includes the following steps:

[0059] Step 1: The mobile terminal sends an access request including UE_ID to the TTG through the AC, requesting to access the WLAN network.

[0060] The access request here includes the terminal identifier and APN information.

[0061] When a mobile terminal accesses a WLAN network, the network elements performing the access operation are TTG and WAG, and these two network elements can be set independently or integrated together. In this embodiment, it is assumed that the TTG and the WAG are integrated together, which is called TTG.

[0062] This embodiment ex...

Embodiment 3

[0088] Embodiment 3 of the present invention provides a system for obtaining the IP address of a mobile terminal, such as image 3 As shown, the system includes a network element 11 for accessing the network and a DNS 12, wherein: the network element 11 for accessing the network is used to receive an access request containing the terminal identifier sent by the mobile terminal, and send to the DNS 12 the access request containing the The query request of terminal identification, after receiving the GGSN address returned by DNS, obtains the IP address corresponding to the mobile terminal from the GGSN indicated by the received GGSN address; DNS 12 is used to The corresponding relationship determines the GGSN address corresponding to the terminal identifier carried in the received query request, and returns the determined GGSN address to the network element 11 accessing the network.

[0089]The query request sent by the network element 11 accessing the network to the DNS 12 also...

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Abstract

The present invention discloses a method and a device for obtaining an IP address of a mobile terminal, wherein the method comprises the main contents as follows: when the mobile terminal switches between a WLAN (Wireless Local Area Network) network and a 2G / 3G (The 2nd / 3rd Generation) network, a GGSN (Gateway GPRS Support Node) address served for the mobile terminal is recorded in a DNS (Domain Name System), so that, before and after the switching of the mobile terminal, a network element accessed to the network can find a corresponding GGSN according to the GGSN address, so as to ensure that the GGSN served for the mobile terminal is always constant, furthermore to ensure that the IP address distributed for the mobile terminal is consistent, thereby solving the mobility management problem of the mobile terminal while switching between the WLAN network and the 2G / 3G network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and equipment for acquiring the IP address of a mobile terminal. Background technique [0002] The Industrial Wireless LAN (IWLAN) specification specifies the specification for the interoperability between the wireless local area network (WLAN) and the 2G / 3G system in TS23.234 and TS23.327, among which: TS23.234 defines the basic structure and network of the IWLAN Element composition, TS23.327 defines the mobility management scheme of IWLAN and 2G / 3G system. [0003] The mobility management scheme defined by TS23.327 is to introduce the home agent (Home Agent, HA) and dual-stack mobile IP protocol (DSMIP) into the system. As the anchor point of the IWLAN system and the 3GPP system, the HA can be integrated with the The gateway GPRS support node (Gateway GPRS Support Node, GGSN) is deployed together. The 2G / 3G system is used as the home network of the mobile terminal, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04W64/00H04W36/14
Inventor 刘大鹏
Owner CHINA MOBILE COMM GRP CO LTD
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