CN102238238A - Method and device for accessing local network equipment - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for accessing local network equipment, which relate to the communication field. In order to solve the problem in the prior art that the operation is complicated because the IP address of the local network device must be input to access the device. The technical solution provided by the present invention includes: Femtocell receives a resolution request sent by a user terminal that includes a domain name, and the domain name is the domain name of a local network device to be accessed by the user terminal; and queries the domain name from a pre-established address mapping table The corresponding IP address, the IP address being the IP address of the local network device; the Femtocell sends the queried IP address to the user terminal, and notifies the user terminal to access the local network device according to the IP address of the local network device. The technical solution provided by the present invention can be applied in the technical field where the mobile terminal accesses the digital home device DHD in the local network.

Description

Method and device for accessing local network equipment

technical field

The invention relates to the communication field, in particular to a method and device for accessing local network equipment.

Background technique

Femtocell (flying honeycomb) technology is a solution for extending indoor coverage of mobile communications. In the overall network architecture of Femtocell, traditional data services need to pass through the local network, IP network, and mobile core network in sequence, and finally reach the destination IP network.

GI interface (GPRS interface) is the interface between GPRS and the external data network. Operations such as encapsulation, decapsulation, and address conversion (such as converting a private network IP address to a public network IP address) of various protocols can be performed on the GI interface. .

After the GI interface is integrated in the Femtocell, the mobile terminal can directly access other devices in the same local network without going through the external IP broadband network and mobile core network. FIG. 1 is a schematic diagram of a user equipment (User Equipment, UE) accessing a digital home device (Digital Home Device, DHD).

In the process of implementing the present invention, the inventors found that when the user accesses the DHD using the UE, the device address of the DHD must be input, for example, http://192.168.1.100. The IP address in digital form can only be obtained after being queried, and the IP address may change sometimes, making it difficult to remember, which increases the complexity of user operations.

Contents of the invention

Embodiments of the present invention provide a method and device for accessing local network equipment, which can simplify user input operations.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A method for accessing local network equipment, applied in Femtocell, including:

The Femtocell receives the resolution request sent by the user terminal and includes the domain name, and the domain name is the domain name of the local network device to be accessed by the user terminal;

Femtocell queries the IP address corresponding to the domain name from a pre-established address mapping table, and the IP address is the IP address of the local network device;

The Femtocell sends the queried IP address of the local network device to the user terminal, and notifies the user terminal to access the local network device according to the IP address of the local network device.

A device for accessing local network equipment, applied in Femtocell, including:

The first receiving unit is configured to receive a resolution request sent by the user terminal that includes a domain name, where the domain name is the domain name of a local network device to be accessed by the user terminal;

a query unit, configured to query an IP address corresponding to the domain name received by the first receiving unit from a pre-established address mapping table, where the IP address is the IP address of the local network device;

The first sending unit is configured to send the queried IP address of the local network device to the user terminal, and notify the user terminal to access the local network device according to the IP address of the local network device.

The method and device for accessing local network devices provided by the embodiments of the present invention can convert the domain name of the device into a corresponding IP address through a preset address mapping table, so that easy-to-use domain name resolution can be realized in the local network. When a user accesses a certain device in the local network, he only needs to enter the domain name of the device instead of a complicated and hard-to-remember IP address, which makes the user input easier. The method and device for accessing local network equipment provided by the embodiments of the present invention can simplify user input operations.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the local network structure of the embodiment of the present invention;

FIG. 2 is a flowchart of a method for accessing a local network device provided by an embodiment of the present invention;

FIG. 3 is a flowchart of a method for accessing a local network device according to another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for accessing a local network device provided by an embodiment of the present invention;

FIG. 5 is a second schematic structural diagram of an apparatus for accessing a local network device provided by an embodiment of the present invention;

FIG. 6 is a third structural diagram of an apparatus for accessing a local network device provided by an embodiment of the present invention;

FIG. 7 is a fourth structural schematic diagram of an apparatus for accessing a local network device provided by an embodiment of the present invention;

FIG. 8 is a communication flow of a UE using a domain name to access a DHD in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to solve the problem of complicated operation in the prior art because the IP address of a local network device must be entered to access the device, the embodiment of the present invention provides a method and device for accessing a local network device. The following embodiments are all Applied in Femtocell.

As shown in Figure 2, the method for accessing a local network device provided by an embodiment of the present invention includes:

Step 101, the Femtocell receives the resolution request sent by the user terminal and includes the domain name, and the domain name is the domain name of the local network device to be accessed by the user terminal;

In the embodiment of the present invention, when the user terminal wants to access a digital home device (Digital Home Device, DHD) in the same local network, the domain name of the DHD can be input, which intuitively reflects the name of the DHD or the Business, so that users do not need to enter IP addresses in the form of numbers that are difficult to remember. And the Femtocell receives the resolution request containing the domain name, so as to find the IP address corresponding to the domain name.

Step 102, the Femtocell queries the IP address corresponding to the domain name from a pre-established address mapping table, and the IP address is the IP address of the local network device;

In the embodiment of the present invention, the address mapping table is pre-established by the Femtocell, reflecting the correspondence between the IP address of each device in the local network and the domain name of the device. When the Femtocell receives the resolution request, it will query in the address mapping table, and return the IP address found in the query to the user terminal.

In step 103, the Femtocell sends the queried IP address of the local network device to the user terminal, and notifies the user terminal to access the local network device according to the IP address of the local network device.

In the embodiment of the present invention, the user terminal uses the IP address returned by the Femtocell as the destination IP address, and sends an access request including the IP address of the user terminal itself and the above-mentioned destination IP address to the Femtocell, and the Femtocell performs a check on the IP address of the user terminal. After conversion, it is sent to the local network. After receiving the access request, the device with the destination IP address returns a response message and completes a communication process, so as to realize the purpose of the user terminal to access the local network device.

The method for accessing a local network device provided by the embodiment of the present invention can convert the domain name of the device into a corresponding IP address through the preset address mapping table, so that easy-to-use domain name resolution can be realized in the local network. When a user accesses a certain device in the local network, he only needs to enter the domain name of the device instead of a complicated and hard-to-remember IP address, which makes the user input easier. The method for accessing local network equipment provided by the embodiments of the present invention can simplify user input operations.

In order to enable those skilled in the art to understand the technical solutions provided by the embodiments of the present invention more clearly, the method for accessing a local network device provided by another embodiment of the present invention will be described in detail below through specific embodiments.

As shown in FIG. 3, the method for accessing a local network device provided by another embodiment of the present invention includes:

Step 201, a user equipment (User Equipment, UE) sends a resolution request including a domain name;

In the embodiment of the present invention, the UE sends a resolution request including the domain name to the Femtocell. Femtocell is equivalent to a home-type 3G micro base station, which is connected to the mobile core network through the broadband Internet to provide 3G mobile communication services for the home environment. After the GI interface function is integrated in the Femtocell, the UE can directly access the DHD equipment in the local network without going through the broadband Internet and the mobile core network. The DHD device mainly refers to a universal plug and play (Universal Plug and Play, UPnP) media service device, which can realize convenient playback of media. The media service device is a device form stipulated by the UPnP specification, which can realize business functions such as AV conversion, video scheduling, connection management and presentation of directory content. Since the IP address of the DHD device is difficult to remember, and many users do not even know how to query the IP address of the device, therefore, in this embodiment, each DHD device in the local network is preset with a simple and intuitive domain name , for example, DHD-MEDIA, when the user wants to access a certain device, he only needs to enter the domain name of the device. For example, when a user uses a mobile phone to access a DHD in the local network, he only needs to enter http://DHD-MEDIA in the mobile phone, and the mobile phone will send a domain name resolution request containing DHD-MEDIA to the Femtocell, requesting that the domain name be resolved to corresponding IP address. It should be noted that the domain name may be the device name of the DHD itself, or a certain service name of the DHD, and the naming rules only need to be simple and intuitive for the user.

Step 202, the Femtocell receives the resolution request sent by the user terminal and includes the domain name, and the domain name is the domain name of the local network device to be accessed by the user terminal;

In the embodiment of the present invention, the Femtocell monitors the resolution request sent by the user terminal in step 201 on a specified port (usually UDP 53).

Step 203, the Femtocell queries the IP address corresponding to the domain name from the pre-established address mapping table, and the IP address is the IP address of the local network device;

In the embodiment of the present invention, the address mapping table is pre-established by the Femtocell, reflecting the correspondence between the IP address of each device in the local network and the domain name of the device. The Femtocell can establish the address mapping table by actively inquiring, or by receiving the service report message of each device in the local network. The following two methods are described in detail:

Method 1: Femtocell sends a service query request to the local network in the form of IP multicast to query which DHDs have a certain service required by Femtocell, and the DHD with this service function replies to Femtocell with a response message in the form of IP unicast, the response The message includes the IP address of the DHD and the pre-configured domain name of the DHD, that is, through this response message, the Femtocell can learn the IP address and domain name of the DHD with the service, and establish a corresponding relationship between them. After the Femtocell queries all the service functions, these correspondences form an address mapping table.

The second method is that the DHD in the local network will regularly send a service report message to the network in the form of IP multicast to report which service functions it has. Therefore, the Femtocell can actively monitor these service reporting messages, so as to obtain the IP address and domain name of the DHD contained in the service reporting messages, so as to establish a corresponding relationship between them, that is, to establish an address mapping table. The type of the service reporting message is the Digital Living Network Alliance (DLNA) protocol. The DLNA protocol is a standard protocol commonly used in home networks at present. The bottom layer of DLNA is implemented based on UPnP. Therefore, based on this protocol, it can The embodiment of the present invention can be applied more widely.

When the Femtocell receives the resolution request, it will search the address mapping table for the IP address corresponding to the domain name included in the resolution request, and will return it to the UE immediately after finding it. If the IP address corresponding to the domain name cannot be found in the address mapping table, the Femtocell will forward the resolution request to the DNS server in the mobile core network, and the DNS server will complete the resolution task. The IP address of the DNS server is included in the resolution request, and is allocated by the mobile core network when the UE completes the process of preparing for accessing the Internet, and at the same time, the IP address of the UE itself is also allocated to the UE. When the Femtocell forwards the parsing request, it follows the forwarding rule of the GI interface in the Femtocell, that is, a routing policy. The forwarding rule determines whether to use the GI interface for forwarding or forward through the mobile core network for a certain target network. After obtaining the IP address corresponding to the domain name, the DNS server returns the IP address to the Femtocell, and then the Femtocell sends the IP address to the UE.

It should be noted that one DHD can register multiple services, and multiple different services of the same DHD can correspond to the unique IP address of the device. For example, the domain name of a certain DHD is DHD-MEDIA, and it has three services A, B, and C, which correspond to the same IP address 192.168.1.100. When the user enters http://DHD-MEDIA/B, Femtocell will It is parsed into http://192.168.1.100/B and returned to the user UE.

The above two methods of establishing the address mapping table can be applied to different time periods respectively. For example, when the Femtocell is just powered on, the address mapping table can be established by actively querying, and then the address mapping table can be established in real time by listening to the service reporting messages in the network. Update this address mapping table.

Step 204, the Femtocell sends the queried IP address of the local network device to the user terminal;

In this embodiment, the Femtocell sends the IP address 192.168.1.100 resolved through the search to the UE.

Step 205, the Femtocell receives the access request sent by the user terminal, and the access request includes the IP address of the user terminal and the IP address of the local network device;

In the embodiment of the present invention, the UE accesses the DHD device through the Femtocell, that is, the UE needs to send the access request message to the Femtocell first, and the Femtocell completes the Network Address Translation (NAT) before forwarding. The access request includes the UE's own IP address (source IP address, represented by Sip=UEIP), the IP address of the DHD to be accessed (destination IP address, represented by Dip=DHDIP), the source port of the request message message number (Sport), destination port number (Dport) and the IP protocol type of the message.

Step 206, the Femtocell converts the IP address of the user terminal into the IP address of the Femtocell;

In the embodiment of the present invention, after the Femtocell receives the access request, it replaces the source IP address of the access request message with its own IP address, and the source port number of the message (the source port of TCP or UDP protocol) number) is replaced by a port natport in the Femtocell port pool, as shown in Figure 8. At the same time, the Femtocell also needs to establish a forwarding table item according to the above parameters, that is, record the parameter information and the replacement information, so as to provide evidence for the subsequent inverse transformation of the network address.

Step 207, the Femtocell finds the local network device according to the IP address of the local network device, so that the user terminal sends access information to the local network device;

Step 208, the local network device finds the Femtocell according to the IP address of the Femtocell, and the Femtocell finds the user terminal according to the IP address of the user terminal, so that the local network device returns a response message to the user terminal.

In the embodiment of the present invention, the Femtocell sends the access request after network address translation to the destination DHD according to the destination IP address, and the DHD responds to the access request and returns a response message to the Femtocell. The destination IP address in the response message is the IP address of the Femtocell, the source IP address is the IP address of the DHD, the source port number is Dport, and the destination port number is natport. Femtocell carries out the inverse conversion of the network address of the message of this response message, namely by querying the forwarding table item in step 206, using the source IP address and source port number in the forwarding table item to replace the destination IP address in the response message message , the destination port number, and finally the Femtocell sends the response message after network address translation to the UE, as shown in FIG. 8 . By repeating the process from step 205 to step 207, multiple communications between the UE and the DHD can be completed.

The method for accessing a local network device provided by the embodiment of the present invention can convert the domain name of the device into a corresponding IP address through the preset address mapping table, so that easy-to-use domain name resolution can be realized in the local network. When a user accesses a certain device in the local network, he only needs to enter the domain name of the device instead of a complicated and hard-to-remember IP address, which makes the user input easier. The method for accessing local network equipment provided by the embodiments of the present invention can simplify user input operations.

As shown in FIG. 4, an embodiment of the present invention also provides an apparatus for accessing a local network device, including:

The first receiving unit 301 is configured to receive a resolution request sent by a user terminal that includes a domain name, where the domain name is the domain name of a local network device to be accessed by the user terminal;

A query unit 302, configured to query an IP address corresponding to the domain name received by the first receiving unit 301 from a pre-established address mapping table, where the IP address is the IP address of the local network device;

The first sending unit 303 is configured to send the IP address of the local network device obtained by the query unit 302 to the user terminal, and notify the user terminal to perform a search on the local network device according to the IP address of the local network device access.

Further, as shown in Figure 5, the device also includes:

The second sending unit 304 is configured to send a service query request to the local network;

The second receiving unit 305 is configured to receive a response message from a device having the service in the local network, where the response message includes the IP address of the device and the domain name of the device;

The first establishing unit 306 is configured to establish the address mapping table according to the response message received by the second receiving unit 305 .

The above three units are the process of establishing the address mapping table by the Femtocell through active query.

Or, as shown in Figure 6, the device also includes:

The third receiving unit 307 is configured to receive a service report message periodically sent by each device in the local network, where the service report message includes the IP address of the device and the domain name of the device;

The second establishing unit 308 is configured to establish the address mapping table according to the service report message received by the third receiving unit 307 .

The above two units are for the Femtocell to complete the process of establishing the address mapping table by receiving service report messages.

Further, as shown in Figure 7, the device also includes:

The fourth receiving unit 309 is configured to receive an access request sent by the user terminal, where the access request includes the IP address of the user terminal and the IP address of the local network device;

A conversion unit 310, configured to convert the IP address of the user terminal received by the fourth receiving unit 309 into the IP address of the Femtocell;

The first search unit 311 is configured to find the local network device according to the IP address of the local network device received by the fourth receiving unit 309, so as to enable the user terminal to send access information to the local network device;

The second searching unit 312 is configured to find the user terminal according to the IP address of the user terminal received by the fourth receiving unit 309 after the local network device finds the Femtocell according to the IP address of the Femtocell, so as to realize the The local network device returns a response message to the user terminal.

For the specific implementation manner of the above-mentioned apparatus, reference may be made to the method part described in steps 201 to 208, which will not be repeated here.

The device for accessing local network devices provided by the embodiments of the present invention can convert the domain name of the device into a corresponding IP address through the preset address mapping table, so that easy-to-use domain name resolution can be realized in the local network. When a user accesses a certain device in the local network, he only needs to enter the domain name of the device instead of a complicated and hard-to-remember IP address, which makes the user input easier. The device for accessing local network equipment provided by the embodiments of the present invention can simplify user input operations.

The technical solution provided by the present invention can be applied in the technical field where the mobile terminal accesses the digital home device DHD in the local network.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM/RAM, disk or disc, etc.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. a method of visiting local network device is applied to it is characterized in that among the Femtocell, comprising:

Femtocell receives the analysis request that comprises domain name that user terminal sends, and domain name is the domain name of the local network device that will visit of described user terminal;

The IP address of Femtocell inquiry domain name correspondence from the address mapping table of setting up in advance, described IP address is the IP address of described local network device;

Femtocell sends to described user terminal with the IP address of the described local network device that inquires, and notifies described user terminal according to the IP address of described local network device described local network device to be conducted interviews.

2. the method for visit local network device according to claim 1 is characterized in that, the step of the foundation of described address mapping table comprises:

Femtocell sends the service inquiry request to local network;

Femtocell receives the response message that has the equipment of described business in the local network, comprises the IP address of described equipment and the domain name of described equipment in the described response message;

Femtocell sets up described address mapping table according to described response message.

3. the method for visit local network device according to claim 1 is characterized in that, the step of the foundation of described address mapping table comprises:

Femtocell receives the professional reporting message that each equipment regularly sends in the local network, comprises the IP address of described equipment and the domain name of described equipment in the described professional reporting message;

Femtocell sets up described address mapping table according to described professional reporting message.

4. according to the method for claim 2 or 3 described visit local network devices, it is characterized in that the protocol type of described professional reporting message is a DLNA DLNA agreement.

5. the method for visit local network device according to claim 1 is characterized in that, also comprises:

Femtocell receives the access request that described user terminal sends, and comprises the IP address of described user terminal and the IP address of described local network device in the described access request;

Femtocell becomes the IP address transition of described user terminal the IP address of Femtocell;

Femtocell finds described local network device according to the IP address of described local network device, sends visit information to realize described user terminal to described local network device;

Described local network device finds Femtocell according to the IP address of described Femtocell, and Femtocell finds described user terminal according to the IP address of described user terminal, to realize that described local network device is to described user terminal echo reply message.

6. a device of visiting local network device is applied to it is characterized in that among the Femtocell, comprising:

First receiving element is used to receive the analysis request that comprises domain name that user terminal sends, and domain name is the domain name of the local network device that will visit of described user terminal;

Query unit is used for the IP address of the domain name correspondence that received by described first receiving element from the address mapping table inquiry of setting up in advance, and described IP address is the IP address of described local network device;

First transmitting element, the IP address that is used for the local network device that will be obtained by described query unit sends to described user terminal, notifies described user terminal according to the IP address of described local network device described local network device to be conducted interviews.

7. the device of visit local network device according to claim 6 is characterized in that, described device also comprises:

Second transmitting element is used for sending the service inquiry request to local network;

Second receiving element is used for receiving the response message that local network has the equipment of described business, comprises the IP address of described equipment and the domain name of described equipment in the described response message;

First sets up the unit, is used for setting up described address mapping table according to the response message that is received by described second receiving element.

8. the device of visit local network device according to claim 6 is characterized in that, described device also comprises:

The 3rd receiving element is used for receiving the professional reporting message that each equipment of local network regularly sends, and comprises the IP address of described equipment and the domain name of described equipment in the described professional reporting message;

Second sets up the unit, is used for setting up described address mapping table according to the professional reporting message that is received by described the 3rd receiving element.

9. the device of visit local network device according to claim 6 is characterized in that, described device also comprises:

The 4th receiving element is used to receive the access request that described user terminal sends, and comprises the IP address of described user terminal and the IP address of described local network device in the described access request;

Converting unit, the IP address transition that is used for the user terminal that will be received by described the 4th receiving element is the IP address of Femtocell;

First searches the unit, is used for finding described local network device according to the IP address of the local network device that is received by described the 4th receiving element, sends visit information to realize described user terminal to described local network device;

Second searches the unit, be used for after described local network device finds Femtocell according to the IP address of described Femtocell, described user terminal is found in IP address according to the user terminal that is received by described the 4th receiving element, to realize that described local network device is to described user terminal echo reply message.

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