WO2014044010A1

WO2014044010A1 - Method, device and system for domain name resolution during traffic offloading

Info

Publication number: WO2014044010A1
Application number: PCT/CN2013/000212
Authority: WO
Inventors: 彭勇; 刘建军
Original assignee: 邦讯技术股份有限公司
Priority date: 2012-09-19
Filing date: 2013-03-01
Publication date: 2014-03-27
Also published as: CN102891900A; CN102891900B

Abstract

Disclosed are a method, device and system for domain name resolution during traffic offloading. Said method comprises: an Internet Protocol (IP) address of a first domain name resolution server is configured in a wireless access network equipment, wherein the first domain name resolution server is located in public internet; the wireless access network equipment receives an address assignment message which is sent to a terminal by a core network, and the address assignment message carries the IP address of a second domain name resolution server, and the IP address of the second domain name resolution server is replaced by the IP address of the first domain name resolution server to obtain a second address assignment message; and the wireless access network equipment sends the second address assignment message to the terminal, and the terminal performs domain name resolution according to the second address assignment message. Application of the method disclosed by the invention enables a user terminal to smoothly access a network in the net mode configured originally during traffic offloading without any modification, and user experience is improved.

Description

Method, device and system for domain name resolution during flow unloading The application is submitted to the Chinese Patent Office on September 19, 2012, and the application number is 201210351000.7, and the invention name is "a method for domain name resolution during traffic unloading. The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a system for domain name resolution during traffic offloading. Background technique

In a wireless communication access network, when a user terminal is configured to perform data services in the Internet mode, the user obtains full Internet access rights. Access Point Name (APN) is a way for Internet access to be accessed by user terminals. For example, China Mobile Net (CMNET) is the name of the access point used by mobile phones. It is the access point name (APN) of China Mobile's GPRS network. It can obtain full Internet access through CMNET and provide NAT service.

The Domain Name System (DNS), the role of the DNS server in the Internet is: Convert the domain name into an IP address that the network can recognize. Internet websites exist in the form of a single server. When visiting a website server, it is necessary to assign an IP address to each server. There are not many websites on the Internet, and users cannot remember the IP address of each website. It generates a convenient DNS, which can convert the user-entered domain name into the IP address of the server to be accessed, and provide a service that resolves the domain name into IP, so that the user can use the short and friendly domain name when surfing the Internet. To access the host of static IP on the Internet.

In the wireless communication access network, when the terminal performs data services, the core network device is required to allocate the IP of the IP and the DNS server to the terminal. It is used to resolve the domain name when the terminal accesses the Internet using the Internet. When the traffic is offloaded, the terminal's data packet is wirelessly accessed. The network device directly accesses the Internet, and the data packet does not pass through the core network. At this time, the original IP address of the DNS cannot be used normally. As a result, the traffic unloading function cannot be used normally when the terminal is in the Internet mode. Summary of the invention

The embodiment of the invention provides a method, a device and a system for domain name resolution during traffic unloading, and proposes to implement the traffic in the radio access network communication device by modifying the IP address of the configuration to the terminal domain name resolution server. The function of domain name resolution when uninstalling.

To achieve the above objective, an embodiment of the present invention provides a method for domain name resolution during traffic offloading, where an IP address of a first domain name resolution server is configured in a radio access network device, and the first domain name resolution server is located in a public In the Internet, the radio access network device receives an IP address allocation message sent by the core network to the terminal, where the address allocation message carries an IP address of the second domain name resolution server; when the radio access network device traffic is unloaded The radio access network device modifies the IP address of the second domain name resolution server sent by the core network to the terminal as the IP address of the first domain name resolution server, and in the traffic unloading, the data packet of the terminal is not Will be sent to the core network device communication. The invention realizes the function of domain name resolution during traffic offloading by modifying the IP address of the domain name resolution server configured by the core network to the terminal in the radio access network device; the method includes: in the traffic unloading:

The radio access network device receives an address allocation message sent by the core network to the terminal, where the address allocation message carries an IP address of the second domain name resolution server;

Replacing the IP address of the second domain name resolution server with the IP address of the first domain name resolution server to obtain a second address allocation message;

The radio access network device sends the second address allocation message to the terminal, and the terminal uses the second address allocation message to perform domain name resolution, thereby establishing communication for the terminal to access the Internet through the wireless access network device.

The present invention also provides a system for domain name resolution during traffic unloading, comprising: configuring an IP address of a first domain name resolution server in a radio access network device, The first domain name resolution server is located in the public Internet; when the radio access network device traffic is offloaded, the radio access network device receives an IP address allocation message sent by the core network to the terminal, where the address allocation message carries the The IP address of the second domain name resolution server. The radio access network device modifies the IP address of the second domain name resolution server sent by the core network to the terminal as the IP address of the first domain name resolution server, and in the traffic offloading, the data packet of the terminal is not sent to Core network device communication; the method includes: in the traffic unloading;

The terminal receives the second address allocation message without any modification, and uses the second address allocation message to carry the IP address of the second domain name resolution server as the IP address of the address resolution server to implement the user terminal accessing the Internet. The present invention also provides a radio access network device, which includes: a configuration unit, configured to receive an IP address configuration parameter of a locally configured first domain name resolution configuration server, and check an IP address. legality. The configured parameters include the primary domain name resolution server IP address and the secondary domain name resolution server IP address.

a receiving unit, configured to receive an address allocation message sent by the core network to the terminal when the traffic is offloaded, where the address allocation message carries an IP address of the second domain name resolution server, and a modifying unit, configured to parse the first domain name The IP address of the server replaces the IP address of the second domain name resolution server;

And a sending unit, configured to send the second address allocation message to the terminal. Compared with the prior art, the present invention has the following advantages: The IP address of the domain name resolution server in the wireless access network device is configured, and the IP address of the domain name resolution server of the terminal is modified, and the terminal does not need any modification to implement domain name resolution during traffic offloading. Features. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work. 1 is a flowchart of a method for domain name resolution during traffic offloading according to the present invention; FIG. 2 is a structural diagram of a system for domain name resolution during traffic offloading according to the present invention; FIG. 3 is a radio access network device of the present invention; Schematic diagram of the structure. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention, and the embodiments described are only a part of the embodiments of the present invention, not all embodiments, based on the present invention All other embodiments obtained by a person of ordinary skill in the art without any inventive effort are within the scope of the present invention.

An embodiment of the present invention provides a method for domain name resolution during traffic offloading, where an IP address of a first domain name resolution server is configured in a radio access network device, where the first domain name resolution server is located in a public Internet; The radio access network device receives the IP address allocation message sent by the core network to the terminal, where the address allocation message carries the IP address of the second domain name resolution server; when the traffic of the radio access network device is unloaded, the radio access The IP address of the second domain name resolution server sent by the network device to the terminal is the IP address of the first domain name resolution server. In the traffic unloading, the data packet of the terminal is not sent to the core network. Device communication; the method includes: in the traffic offloading; the specific implementation process is as shown in FIG. 1 , including: in the traffic unloading: Step 101: configuring, by the radio access network device, the first domain name resolution server IP address, and check the legitimacy of the IP address.

Step 102: The radio access network device receives an address allocation message sent by the core network to the terminal, where the address allocation message carries an IP address of the second domain name resolution server.

Step 103: The radio access network device determines whether the local traffic offloading function is enabled.

Step 104: If the local traffic offloading function is not enabled, the address allocation message sent by the core network to the terminal is normally sent. Step 105: If the local traffic unloading function is enabled, the radio access network device modifies the IP address of the second domain name resolution server carried in the address allocation message sent by the core network to the terminal as the configured first domain name resolution server. IP address;

Step 106: The radio access network device modifies an address assignment message sent by the core network to the terminal to obtain a second address allocation message, where the radio access network device sends the second address allocation message to the terminal.

The address allocation message sent by the core network to the terminal is specifically: a packet message protocol activation accept message, or a packet message protocol secondary activation accept message, or a packet message protocol modification accept message.

The message that the core network sends the IP address of the terminal to the terminal and the IP address of the DNS in the 3G network is the packet PIM context accept or the secondary packet PTY Context Accept or the packet. The text protocol modification accept message, Modify PDP context accept, etc., and the message is similar in the 4G / LTE system.

In the case of traffic offloading, because the data packet does not pass through the core network, but directly connects to the Internet in the wireless access network device, the original configured DNS is unavailable. Therefore, the correct DNS is configured in advance in the wireless access network device. IP address, and make the IP address configurable, can be changed.

The IP address of the first domain name resolution server configured in the radio access network device includes:

Configure the IP address of the primary domain name resolution server and the IP address of the secondary domain name resolution server. Check the legality of the configured primary domain name resolution server IP address and the secondary domain name resolution server IP address.

This example uses the TD_SCDMA home base station as an example to illustrate the specific process of domain name resolution in CMNET mode by modifying the IP address of the DNS of the terminal:

Step A: Configure the home base station to enable the traffic unloading function, and when the terminal accesses the Internet, send a PDP context request to the core network, and the core network responds to the PDP context accept message to the terminal, and The message carries the IP address assigned to the terminal (UE) and the IP address of the DNS. Family The base station determines that the traffic offload function is enabled, and after intercepting the Activate PDP context accept message, the value of the DNS IP address is modified to a pre-configured value, and then the message is sent to the terminal.

Step B: After receiving the PDP context accept message, the terminal configures the IP address of the DNS as the modified IP address value of the home base station. Step C: When the terminal accesses the Internet using the CMNET mode, the terminal sends a domain name resolution request. Message to the DNS of the specified IP;

Step D: After receiving the data packet, the PDCP module of the home base station performs traffic offloading, and directly sends the data packet to the destination IP address in the IP packet, thereby implementing local traffic unloading.

In addition, the present invention also provides a system for domain name resolution during traffic offloading. As shown in FIG. 2, the system includes:

The radio access network device 101, the radio access network device accepts the IP address of the first domain name resolution server locally, and checks the legality of the IP address. The radio access network device receives an address allocation message sent by the core network to the terminal, where the address allocation message carries an IP address of the second domain name resolution server; and the radio access network device determines whether the local traffic offload function is If the local traffic offloading function is not enabled, the address allocation message sent by the core network to the terminal is normally sent. If the local traffic offloading function is enabled, the wireless access network device modifies the IP address of the second domain name resolution server carried in the address allocation message sent by the core network to the terminal as the IP address of the configured first domain name resolution server; The radio access network device modifies the address allocation message sent by the core network to the terminal to obtain a second address allocation message; the radio access network device sends the second address allocation message to the terminal;

The terminal 102 receives the address allocation message without any modification, and obtains an IP address of the first domain name resolution server in the message.

The first domain name resolution server 103 is located on the public Internet and is configured to return the domain name resolution balance of the terminal 102 through the radio access network device 101 according to the IP data sent by the radio access network device 101.

In addition, the present invention further provides a radio access network device, as shown in FIG. 3, including: The configuration unit 1011 is configured to receive an IP address of the first domain name resolution server, and check the legality of the IP address. The receiving unit 1012 is configured to receive an address allocation message sent by the core network to the terminal when the traffic is offloaded, where the address allocation message carries the IP address of the second domain name resolution server;

The modifying unit 1013 is configured to replace the IP address of the second domain name resolution server in the address allocation message with the IP address of the first domain name resolution server;

The sending unit 1014 is configured to send the second address allocation message to the terminal. The technical solution of the embodiment of the present invention has the following advantages: the domain name resolution function during traffic offloading is implemented by modifying the IP address of the domain name resolution server configured in the wireless access network device to improve the user experience. Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by software plus necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including A number of instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the units or processes in the drawings are not necessarily required to implement the invention.

Those skilled in the art can understand that the units in the system in the embodiment may be distributed in the apparatus of the embodiment according to the description of the embodiment, or the corresponding changes may be located in one or more apparatuses different from the embodiment. The units of the above embodiment may be combined into one unit, or may be further split into a plurality of subunits.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. The above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the invention. Those of ordinary skill in the art should The invention can be modified or equivalently substituted without departing from the spirit and scope of the invention, and should be included in the scope of the claims of the invention.

Claims

Rights request

1. A method for domain name resolution during traffic offloading, characterized in that the IP address of a first domain name resolution server is configured in the wireless access network device, and the first domain name resolution server is located in the public Internet; the wireless access network device The network access device receives the IP address allocation message sent by the core network to the terminal, and the address allocation message carries the IP address of the second domain name resolution server; when the wireless access network device traffic is offloaded, the wireless access network device Modify the IP of the second domain name resolution server sent by the core network to the terminal to the IP address of the first domain name resolution server. In the traffic offloading, the terminal's data packet will not be sent to the core network device for communication; The method includes, in the traffic offloading: the wireless access network device receives an address allocation message from a terminal, where the address allocation message carries the IP address of the second domain name resolution server;

Replace the IP address of the second domain name resolution server with the IP address of the first domain name resolution server to obtain a second address allocation message;

The wireless access network device sends the second address allocation message to the terminal, and the terminal performs domain name resolution according to the second address allocation message, thereby completing the normal domain name resolution function and the terminal's normal access to the Internet.

2. The method according to claim 1, wherein the address allocation message sent by the core network to the terminal is specifically: a packet message protocol activation acceptance message, or, an auxiliary packet message protocol activation acceptance message, or, Packet message protocol modification accept message.

3. The method of claim 1, wherein configuring the IP address of the first domain name resolution server in the wireless access network device includes:

Configure the IP address of the primary domain name resolution server and the IP address of the secondary domain name resolution server; Check the validity of the configured primary domain name resolution server IP address and secondary domain name resolution server IP address.

4. A system for domain name resolution during traffic offloading, characterized by including: a wireless access network device, configured to receive the locally configured IP address configuration parameters of the first domain name resolution server, and check the legality of the configured IP address. sex. Receive the address allocation message sent by the core network to the terminal; and check whether the local traffic offloading function is turned on. If it is turned on, modify the address allocation message sent by the core network to the terminal to carry the IP address of the second domain name resolution server; use the Replace the IP address of the second domain name resolution server with the IP address of the first domain name resolution server to obtain a second address allocation message; Send the second address allocation message to the user terminal;

The terminal, without any modification, is used to receive the second address allocation message and use the IP address of the second domain name resolution server carried in the second address allocation message as the IP address of the address resolution server to implement the user terminal Domain name resolution when accessing the Internet;

5. A wireless access network device, characterized by including:

The configuration unit is configured to receive the IP address configuration parameters of the locally configured first domain name resolution configuration server, and check the validity of the IP address. The configured parameters include the IP address of the primary domain name resolution server and the IP address of the secondary domain name resolution server;

A receiving unit, configured to receive an address allocation message sent by the core network to the terminal during traffic offloading, where the address allocation message carries the IP address of the second domain name resolution server; A modification unit, configured to use the first domain name resolution The IP address of the server replaces the IP address of the second domain name resolution server; A sending unit, configured to send the second address allocation message to the terminal.