CN101127671B - A method and system for remote control of home electrical appliance devices - Google Patents

Abstract

A method and system for remotely controlling home appliances, in which a user terminal constructs a session initiation protocol (SIP) signaling and sends it to an IP multimedia subsystem, the SIP signaling includes: the home appliance that the user terminal needs to communicate with attribute information of the home appliance, the operation information to be implemented on the home appliance, and the home gateway identification; then the IP multimedia subsystem judges whether the user terminal meets the initial filtering rules set by the home gateway, and if so, according to the home gateway identification The home gateway is found, and the SIP signaling is forwarded to it; the home gateway finds qualified household electrical appliances in the home domain according to the attribute information in the SIP signaling, and then performs operations on the household appliances according to the operation information. The invention enables users to use multiple terminals supporting the IP multimedia subsystem to access the home network at any time and any place, so as to obtain optimal and colorful user experiences.

Description

Method and system for remote control of home appliances

technical field

The present invention relates to a network technology, in particular to a method and a system for remotely controlling home appliances located in a home domain through an IP multimedia subsystem.

Background technique

When the user is outside the home domain, there is often a need to interact with the home environment. This interaction may include obtaining real-time home environment information, obtaining data content such as documents, music, and video from home appliances, remotely controlling devices in the home, and so on. For example, the user needs to copy an important electronic document from the computer at home when going out to work; the user wants to pass the time by listening to some music stored in the computer at home during the trip. In situations such as these, the user hopes to be able to remotely control the home appliances located in the home domain through a device around him.

Some existing technologies for remote control of home appliances basically realize the transmission of control signaling and data through the Internet. Since the user cannot access the Internet anytime and anywhere, this brings great inconvenience to the user and greatly limits the applicability of this type of remote control technology. With the rapid development of wireless mobile communication technology, the coverage and transmission rate of wireless mobile communication networks have been greatly improved. Mobile phones can be connected to the telecommunications network anytime and anywhere and can obtain high-speed, high-quality voice For data services, it is one of the best solutions to use mobile phones to remotely control home appliances in the home domain through wireless mobile communication networks.

The mobile communication has been developed to the third generation. As an important part of the core network of the third generation mobile communication, the IP multimedia subsystem IMS can support rich IP multimedia services. IMS is based on the system of the session initiation protocol SIP, and uses the SIP call control mechanism to create, manage and terminate various types of multimedia services. IMS provides the basis for business integration, and it supports voice, data and multimedia services as well as new applications based on IP technology.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system for remotely controlling home appliances, so that users can use a variety of terminals supporting IP multimedia subsystems to access the home network at any time and anywhere, and control home appliances. Remote control for the best and colorful user experience.

In order to solve the above problems, the present invention proposes a method for remotely controlling household electrical appliances, including the following steps:

(1) The user terminal constructs the Session Initiation Protocol SIP signaling, and sends it to the IP multimedia subsystem. The SIP signaling includes: the attribute information of the home appliance that the user terminal needs to communicate with, and the home appliance to be implemented. Operation information, and home gateway identification;

(2) judging whether the user terminal meets the initial filter rule set by the home gateway by the IP multimedia subsystem, if so, finding the home gateway according to the home gateway identification, forwarding the SIP signaling to it;

(3) The home gateway finds a qualified home appliance in the home domain according to the attribute information in the SIP signaling, and then performs operations on the home appliance according to the operation information.

Further, the method for remotely controlling household electrical appliances may also have the following characteristics. In step (1), a MESSAGE request of SIP signaling is constructed, and the attribute information includes at least one of the following: device type, device name, and operation information Including: turning on or off; in step (3), the home gateway controls the turning on or off of the home appliance.

Further, the method for remotely controlling household electrical appliances may also have the following characteristics. In step (1), an INVITE request for SIP signaling is constructed, and the INVITE request also includes: media negotiation information, and the attribute information includes at least the following One: device type, device name, operation information includes: data transmission, media negotiation information includes: the media type supported by the user terminal; in step (3), confirm the media supported by both the home appliance device and the user terminal according to the media negotiation information After typing, start the home appliance for data transmission.

Further, the method for remotely controlling household electrical appliances may also have the following characteristics. After the home gateway is registered, the IP multimedia subsystem binds the home gateway IP address with the public user identity of the home gateway; when the home gateway is in the IP multimedia After completing the public user identity registration in the home subscriber server in the subsystem, set its own initial filtering rules in the home subscriber server through the application server, and modify the home gateway's Initial filter rules.

Further, the method for remotely controlling household electrical appliances may also have the following features, in step (1), the home gateway identification includes: home gateway public user identity.

Further, the method for remotely controlling household electrical appliances may also have the following features, step (2) includes the following steps: (21) The proxy call session control of the IP multimedia subsystem forwards the SIP signaling to the Service session control of user service; (22) The service session control extracts the user's initial filtering rules from the home user server, evaluates the user's initial filtering rules, and determines the next step of processing the request message. If the evaluation result is to forward the request message to the destination, by analyzing the host part of the public user identity of the home gateway in the request message, query the inquiry session control in the home network, and forward the request message to it; (23) The inquiry session control inquires the address of the service session control serving the home gateway to the local home network server, and then sends the request message to this address; (24) the service session control serving the home gateway is based on the initial filter rule of the home gateway, Judging whether the user terminal that initiated the request has been allowed by the home gateway, if allowed, the request message is sent to the agent call session control; otherwise, the forwarding is refused; (25) the agent call session control is based on the binding of the public user identity and the home gateway IP address Determine the relationship, and send the request message to the home gateway corresponding to the IP address.

Further, the method for remotely controlling household electrical appliances may also have the following features. In step (3), the following steps are included: (31) The home gateway sends a response to the user terminal, and the response message body includes: (32) The user terminal determines the media type used for communication according to the response and informs the home gateway; (33) After the home gateway knows the media type, it sends a response message to the user terminal; (34) When the user confirms When transmitting, the user terminal sends a message to the home gateway to notify the home gateway to perform data transmission; (35) the home gateway activates the home appliance, and transmits the media data after both the home gateway and the user terminal confirm.

A system for remotely controlling home appliances, including: user terminals, IP multimedia subsystems, and home gateways, wherein,

The user terminal is used to construct the session initiation protocol signaling SIP and send it to the IP multimedia subsystem. The SIP signaling includes: the attribute information of the home appliance that the user terminal needs to communicate with, and the operation to be performed on the home appliance information, and home gateway identification;

The IP multimedia subsystem is used to judge whether the user terminal complies with the initial filter rule set by the home gateway, and if so, find the home gateway according to the home gateway identifier and forward the SIP signaling to it;

The home gateway is used to find qualified home appliances in the home domain according to the attribute information in the SIP signaling, and then perform operations on the home appliances according to the operation information.

Further, the system for remotely controlling household electrical appliances may also have the following features, the user terminal also constructs a SIP signaling MESSAGE request, the attribute information includes at least one of the following: device type, device name, and the operation information includes: enable or off; the home gateway also controls the on or off of home appliances.

Further, the system for remotely controlling household electrical appliances may also have the following features, the user terminal also constructs an INVITE request for SIP signaling, and the INVITE request also includes: media negotiation information, and the attribute information includes at least one of the following: The device type, device name, and operation information include: data transmission, and the media negotiation information includes: the media type supported by the user terminal; after the home gateway confirms the media type supported by both the home appliance device and the user terminal according to the media negotiation information, it starts the Home appliances for data transmission.

Further, the system for remotely controlling household electrical appliances may also have the following features, the IP multimedia subsystem binds the IP address of the home gateway with the public user identity of the home gateway after the home gateway is registered; when the home gateway is in After the public user identity registration is completed in the home subscriber server in the IP multimedia subsystem, set its own initial filtering rules in the home subscriber server through the application server, and modify the home Initial filter rules for the gateway.

Further, the system for remotely controlling household electrical appliances may also have the following features, the home gateway identification includes: home gateway public user identity.

Further, the system for remotely controlling household electrical appliances may also have the following features: the IP multimedia subsystem also performs proxy call session control, service session control, and the home gateway also performs inquiry session control, service session control, and proxy call session control , wherein the proxy call session control of the IP multimedia subsystem is used to forward the SIP signaling to the service session control serving the user who initiated the message; the service session control of the IP multimedia subsystem is used to send The server extracts the user's initial filtering rules, evaluates the user's initial filtering rules, and determines the next step of processing the request message. If the evaluation result is to forward the request message to the destination, by analyzing the host part in the public user identity of the home gateway in the request message, query the inquiry session control in the home network, and forward the request message to it; The query session control of the gateway is used to inquire the address of the service session control serving the home gateway from the local home network server, and send the request message to this address; the service session control of the home gateway is used for initial filtering according to the home gateway Rule, judging whether the user terminal that initiated the request has been allowed by the home gateway, if allowed, the request message is sent to the proxy call session control; the proxy call session control of the home gateway is used for Binding relationship, sending the request message to the home gateway corresponding to the IP address.

Further, the system for remotely controlling household electrical appliances may also have the following features. The home gateway also sends a message to the user terminal, including: the media type supported by the household electrical appliance; Send a response message; the user terminal also determines the media type used for communication according to the media type supported by the home appliance and informs the home gateway.

Compared with the prior art, the present invention realizes the remote control of home appliances through the IP multimedia subsystem. The multimedia subsystem finds the home gateway according to the home gateway identifier, and then the home gateway finds the qualified home appliance according to the attribute information, and turns on or off the home appliance according to the operation information. If the user terminal also transmits media negotiation information, it can be based on This information controls the household appliances to perform data transmission. Furthermore, users can use various terminals supporting the IP multimedia subsystem to access the home network at any time and any place, so as to obtain the best and colorful user experience.

Description of drawings

Fig. 1 is a system block diagram in the embodiment;

Fig. 2 is the method flowchart in the embodiment;

Fig. 3 is a flow chart of a method in another embodiment.

Detailed ways

The invention proposes a wireless mobile network-based method and a system for realizing remote control of home appliances through an IP multimedia subsystem. The present invention will be further described in detail with the accompanying drawings and examples below.

As shown in Figure 1, a system for remotely controlling home appliances includes: a user terminal, an IP multimedia subsystem, an IP connectivity access network (IP-Connectivity AccessNetwork), a home gateway, and multiple home appliances, wherein,

The user terminal is used to construct SIP signaling and send it to the IP multimedia subsystem through the IP connectivity network. The SIP signaling includes: attribute information of the home appliance that the user terminal needs to communicate with, and the home appliance will be Implemented operational information and home gateway identification;

The SIP signaling includes: an INVITE request and a MESSAGE request, wherein the INVITE request includes: the attribute information of the home appliance that the user terminal needs to communicate with, the operation information to be implemented on the home appliance (extended markup language XML can be used), And the information used for media negotiation (encapsulated into the INVITE request message body with the session description protocol SDP), the attribute information includes at least one of the following: device type, device name, etc., and the home appliance operation information includes: data transmission, etc. The media negotiation information includes: the media type supported by the user equipment, the address and port used by the user equipment to receive media, etc.; the MESSAGE request includes: attribute information and operation information, and the attribute information includes at least one of the following: device type, device name etc., the operation information includes: open, close, etc.

The home gateway identifier includes: home gateway public user identity, in a format such as Bob@bupt.com or 123456@bupt.com. Of course, it also includes other symbols and characters used to identify the home gateway, and a format in which the corresponding home gateway can be found according to a certain binding relationship, and the like.

The IP multimedia subsystem is used for the transmission of control signaling between the user terminal and the home gateway, including: judging whether the user terminal conforms to the initial filter rule set by the home gateway, and if so, finding the home according to the home gateway identifier Gateway and forwards SIP signaling to it;

After the home gateway is registered in the home user server of the IP multimedia subsystem, the binding between the home gateway IP address and the home gateway public user identity is completed and the binding relationship is saved in the home user server. When the user terminal meets the initial filtering rules of the home gateway, the IP multimedia subsystem forwards the SIP signaling to the home gateway corresponding to the IP address according to the stored binding relationship between the public user identity and the home gateway IP address .

The IP connectivity access network is used for data transmission between the user terminal and the IP multimedia subsystem, between the home gateway and the IP multimedia subsystem, and between the user terminal and the home gateway. IP connectivity access network refers to any network with IP as the bearer, which can be a wireless mobile communication network, such as the general packet radio service network GPRS, the universal mobile communication system UMTS, and the wireless local area network WLAN, and can be a wired communication network, such as the Internet, local area network;

The home gateway is used to search for qualified home appliances in the home domain according to the attribute information in the SIP signaling, and then perform operations on the home appliances according to the operation information;

When the SIP signaling includes an INVITE request, the home gateway confirms the media type supported by both the home appliance and the user terminal according to the media negotiation information and reserves resources before starting the home appliance for data transmission. When the SIP signaling includes: a MESSAGE request, the home gateway turns on or off the home appliance according to the operation information.

The home gateway sends a message to the user terminal, including: the media type supported by the home appliance. The user terminal determines the media type used for communication according to the media type supported by the home appliance, reserves resources and informs the home gateway. After the home gateway learns After specifying the media types supported by the user terminal, resource reservation is performed and a response message is sent to the user terminal. Then, when the user confirms the transmission, the user terminal notifies the home gateway to perform data transmission, and the home gateway activates the home appliance after receiving the message, and performs media data transmission after both the home gateway and the user terminal confirm.

After the home gateway completes the public user identity registration in the home subscriber server of the IP multimedia subsystem, it sets its own initial filtering rules in the home subscriber server through the application server to check the identity of the user terminal accessing its own IP multimedia subsystem. Make restrictions to ensure that only users allowed by the home gateway can initiate application requests to it. And through the interaction between the home user server of the IP multimedia subsystem and the application server, the initial filtering rule is modified.

The home gateway extracts the home appliance attribute information and operation information from the SIP signaling message body, and uses it to construct the protocol signaling used by the current home domain for the interconnection of home appliances, and to discover and operate home appliances on behalf of the user terminal in the home domain , and send the operation result to the user terminal through the IP connectivity network. However, the protocol used for interconnection, intercommunication and mutual discovery between home appliances is not necessarily the SIP protocol, and may be any existing standard protocol that can support the interconnection of home appliances in the home domain.

Home appliances are the objects that users will eventually operate. Household appliances use some existing technology to interconnect in the home domain, and can discover each other's existence and realize mutual control. Existing technical standards, such as UPnP and IGRS, can be used for interconnection, mutual discovery and resource sharing of home appliances. Signaling and data are sent and received between home appliances and between home appliances and home gateways through a physical transmission medium. The physical transmission medium may be a twisted pair, power line or wireless.

In the system that realizes the remote control of home appliances through the IP multimedia subsystem, the SIP signaling construction of the user on the terminal side is also an important part. The user needs to add the session description protocol text used for session negotiation in the message body of the SIP signaling. In addition, the attribute information of the home appliance that the user needs to communicate with and the home appliance that the user will communicate with need to be added to the message body. The operation information implemented by the device, which is described by the extended markup language XML. The SIP signaling used for remote control of home appliances includes two types: one is MESSAGE messages used to control the home appliances on or off; the other is INVITE messages used for remote transmission of data stored in home appliances. Both types of messages are message types in the Session Initiation Protocol SIP.

A method for remotely controlling household electrical appliances, as shown in Fig. 2 and Fig. 3 respectively, includes: controlling the household electrical appliances to perform remote data transmission, and remotely turning on or off the household electrical appliances.

Figure 2 is the process of remotely controlling household appliances to transmit data to the user terminal, using the INVITE message in the SIP protocol, including the following steps:

Step 210, the user terminal constructs the INVITE request message of SIP signaling, and sends the INVITE request message to the IP multimedia subsystem through the IP connectivity network;

The message body of the INVITE request of the SIP signaling includes: the attribute information of the home appliance that the user terminal needs to communicate with, the operation information to be implemented on the home appliance (extended markup language XML can be used), the home gateway identifier and media negotiation information; The information of the media negotiation is encapsulated into the INVITE request with the session description protocol SDP. The home gateway identifier includes: home gateway public user identity.

Step 220, judging whether the INVITE request meets the initial filter rule of the home gateway by the IP multimedia subsystem, if yes, finding the home gateway according to the home gateway identification, forwarding the INVITE request to it;

Step 230, the home gateway extracts the home appliance attribute information in the INVITE request, and finds the eligible home appliance according to the attribute information;

Step 240, the home gateway extracts the media negotiation information in the INVITE request, confirms with the user terminal the media types supported by both parties according to the negotiation information, and reserves resources between the home gateway and the user terminal;

In step 250, the home gateway activates the home appliance for data transmission according to the operation information in the INVITE message body.

In step 220, search for the home gateway by the IP multimedia subsystem and forward the request message to it, including the following steps:

Step 2201, the INVITE request message is forwarded by the P-CSCF of the IP Multimedia Subsystem to the S-CSCF serving the user who initiated the message;

Step 2202, the S-CSCF extracts the user's initial filtering rules from the home user server, evaluates the user's initial filtering rules, and determines the next step of processing the request message. If the evaluation result is to forward the request message to the destination, the S-CSCF will analyze the host part of the public user identity of the home gateway in the request message, query an I-CSCF in the home network, and forward the request message to the I-CSCF;

After the home gateway completes the public user identity registration in the home subscriber server in the IP multimedia subsystem, it sets its own initial filtering rules in the home subscriber server through the application server, which is used to check the identity of the user who visits its own IP multimedia subsystem. Restrictions are made to ensure that only users permitted by the home gateway can initiate application requests to the home gateway. And through the interaction between the home subscriber server and the application server of the IP multimedia subsystem, the initial filtering rules of the home gateway are modified.

Step 2203, the I-CSCF, as the entrance of the home gateway's home network, asks the local home network server for the address of the S-CSCF serving the home gateway, and then sends the request message to the address;

Step 2204, the S-CSCF serving the home gateway judges whether the requesting user terminal is allowed by the home gateway according to the initial filtering rules of the home gateway, and if allowed, according to the binding relationship between the public user identity and the home gateway IP address, Send the request message to the home gateway corresponding to the IP address through the P-CSCF; otherwise, refuse to forward it.

Among them, P-CSCF stands for Proxy Call Session Control Function, S-CSCF stands for Serving Session Control Function, I-CSCF stands for Inquiry Session Control Function, HSS stands for Home Subscriber Server, all of them are important network elements of IP Multimedia Subsystem. Take session management and routing.

In step 240, the home gateway and the user terminal confirm the media types supported by both parties and reserve resources, including the following steps:

Step 2401, after finding a qualified home appliance in the home domain, the home gateway sends a 183 response to the user, and the response message body includes at least: the media type supported by the home appliance;

The response message body also includes: a port number, and when RTP protocol is used for data transmission, the port corresponding to the port number receives the media content.

Step 2402, after receiving the 183 response from the home gateway, the user terminal knows the media type acceptable to both parties, and then determines the media type used for communication, and includes the determined media type in the PRACK confirmation message sent to the home gateway , while the user terminal performs a resource reservation operation;

Step 2403, after the home gateway receives the PRACK message, it knows the media type used for communication, sends a 200 OK response to the user, and reserves resources at the same time;

When performing real-time data transmission, in order to ensure QoS, the home gateway needs to reserve resources.

Step 2404, after the resource reservation is completed, the user terminal sends an UPDATE message to the home gateway to notify the home gateway of this event;

Step 2405, after receiving the UPDATE message, the home gateway sends a 200 OK response to the user terminal, and after the home gateway completes resource reservation, sends a 180 ringing message to the user terminal to notify the user that resource reservation is complete and media transmission can be performed.

In step 250, the home gateway activates the home appliance for data transmission according to the operation information in the INVITE message body, including the following steps:

Step 2501, after the user terminal receives the 180 ringing message, it knows that the home network side device is ready, and asks the user whether to start data transmission. If the user confirms the transmission, the user terminal sends a PRACK message to the home gateway to notify the home gateway to perform data transmission. transmission;

In step 2502, the home gateway activates the home appliance after receiving the PRACK message, and transmits media data after both the home gateway and the user terminal confirm.

Another embodiment of the present invention, as shown in Figure 3, is the process of remotely controlling the opening or closing of household appliances, using the MESSAGE message in the SIP protocol, including the following steps:

Step 310, the user terminal constructs a MESSAGE request message of SIP signaling, and sends the MESSAGE request message to the IP multimedia subsystem through the IP connectivity network;

The attribute information of the home appliance that the user needs to communicate with, the operation information to be implemented on the home appliance, and the identification of the home gateway are encapsulated into the message body of the MESSAGE request using the extended markup language XML. Wherein, the attribute information of the household electrical appliance includes at least one of the following: equipment type, equipment name, etc., and the operation information of the household electrical appliance includes: opening, closing, and the like.

Step 320, judging whether the MESSAGE request meets the initial filter rule of the home gateway by the IP multimedia subsystem, if yes, finding the home gateway according to the home gateway identification, forwarding the MESSAGE request to it, and performing step 230; otherwise, rejecting Forward the MESSAGE request;

Step 330, the home gateway extracts the attribute information and operation information in the MESSAGE request, constructs the protocol signaling applied to the home network, and finds the eligible home appliances according to the attribute information;

Step 340, the home gateway sends a control message to the home appliance according to the operation information, and then sends a 200 OK response to the user, completing the remote control of the home appliance.

The difference between this embodiment and the previous embodiment is that the message sent by the user terminal to the home gateway is a MESSAGE message, which is only used to remotely control the opening or closing of the home appliance, and does not involve remote transmission of data, so the message body does not contain For media negotiation information, the user equipment and the home gateway do not need to perform resource reservation.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions disclosed in the present invention Within the technical scope, easily conceivable changes or substitutions shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (14)

1. A method for remotely controlling household electrical appliances, comprising the following steps: (1) The user terminal constructs the INVITE request message of the session initiation protocol SIP signaling, and sends it to the IP multimedia subsystem. The message body of the INVITE request of the SIP signaling includes: the information of the home appliance that the user terminal needs to communicate with Attribute information, the operation information to be implemented on the home appliance, and the home gateway identification and media negotiation information; (2) judging whether the user terminal meets the initial filtering rule provided by the home gateway by the IP multimedia subsystem, if so, finding the home gateway according to the home gateway identification, forwarding the INVITE request of the SIP signaling to it; (3) According to the attribute information in the INVITE request of SIP signaling, the home gateway finds a qualified home appliance in the home domain, extracts the media negotiation information in the INVITE request, and confirms with the user terminal based on the media negotiation information. media type, and reserve the resources of the home gateway and the user terminal; then perform data transmission operations on the home appliance according to the operation information in the INVITE message body. 2. The method for remotely controlling household appliances as claimed in claim 1, characterized in that: In step (1), construct the MESSAGE request of SIP signaling, the attribute information includes at least one of the following: device type, device name, and operation information includes: open or close; In step (3), the home appliance is controlled by the home gateway to turn on or off. 3. The method for remotely controlling household appliances as claimed in claim 1, characterized in that: In step (1), construct the INVITE request of SIP signaling, the INVITE request also includes: media negotiation information, and the attribute information includes at least one of the following: device type, device name, and operation information includes: data transmission, media negotiation The information includes: the media type supported by the user terminal; In step (3), after confirming the media types supported by both the home appliance and the user terminal according to the media negotiation information, the home appliance is started to perform data transmission. 4. The method for remotely controlling household appliances as claimed in claim 1, characterized in that, in step (1), further comprising: After the home gateway is registered, the IP multimedia subsystem binds the public user identity of the home gateway with the home gateway IP address; After the home gateway completes the public user identity registration in the home subscriber server in the IP multimedia subsystem, it sets its own initial filtering rules in the home subscriber server through the application server, and through the communication between the home subscriber server of the IP multimedia subsystem and the application server Interact to modify the initial filtering rules of the home gateway. 5. The method for remotely controlling household appliances as claimed in claim 4, wherein: In step (1), the home gateway identification includes: home gateway public user identity. 6. The method for remotely controlling household appliances as claimed in claim 1, wherein step (2) comprises the following steps: (21) The proxy call session control of the IP multimedia subsystem forwards the SIP signaling to the service session control of the user serving the message; (22) The user's initial filtering rules are extracted from the home user server by the service session control and evaluated. If the evaluation result is to forward the request message to the destination, the home gateway public user identity in the request message is resolved. part, query the inquiry session control in the home network, and forward the request message to it; (23) The inquiry session control inquires the address of the service session control serving the home gateway from the local home network server, and then sends the request message to the address; (24) The service session control for the home gateway service judges whether the user terminal initiating the request is allowed by the home gateway according to the initial filtering rules of the home gateway, and if allowed, sends the request message to the proxy call session control; otherwise, refuses to forward ; (25) The proxy call session control sends the request message to the home gateway corresponding to the IP address according to the binding relationship between the public user identity and the home gateway IP address. 7. The method for remotely controlling household electrical appliances as claimed in claim 3, characterized in that, in step (3), comprising the following steps: (31) The home gateway sends a response to the user terminal, and the response message body includes: the media type supported by the home appliance; (32) The user terminal determines the media type used for communication according to the response and informs the home gateway; (33) After the home gateway knows the media type, it sends a response message to the user terminal; (34) When the user confirms the transmission, the user terminal sends a message to the home gateway to notify the home gateway to perform data transmission; (35) The home gateway activates the home appliance, and transmits the media data after both the home gateway and the user terminal confirm. 8. A system for remotely controlling home appliances, including: user terminals, IP multimedia subsystems, and home gateways, wherein, The user terminal is used to construct the session initiation protocol signaling SIP and send it to the IP multimedia subsystem. The SIP signaling includes: the attribute information of the home appliance that the user terminal needs to communicate with, and the operation to be performed on the home appliance information, and the home gateway identifier; when the SIP signaling includes an INVITE request, it also includes media negotiation information; The IP multimedia subsystem is used to judge whether the user terminal complies with the initial filter rule set by the home gateway, and if so, find the home gateway according to the home gateway identifier and forward the SIP signaling to it; The home gateway is used to find qualified home appliances in the home domain according to the attribute information in the SIP signaling, and then perform operations on the home appliances according to the operation information. When the SIP signaling includes an INVITE request, the home gateway After the media negotiation information confirms the media type supported by both the home appliance and the user terminal and reserves resources, the home appliance is started for data transmission. 9. The system for remotely controlling household electrical appliances as claimed in claim 8, characterized in that: The user terminal also constructs a MESSAGE request for SIP signaling, and the attribute information includes at least one of the following: device type, device name, and operation information includes: on or off; The home gateway also controls the turning on or off of home appliances. 10. The system for remotely controlling household electrical appliances as claimed in claim 8, characterized in that: The user terminal also constructs an INVITE request for SIP signaling, the INVITE request also includes: media negotiation information, the attribute information includes at least one of the following: device type, device name, operation information includes: data transmission, media negotiation information includes: Media types supported by the user terminal; The home gateway also confirms the media type supported by both the home appliance and the user terminal according to the media negotiation information, and then starts the home appliance to perform data transmission. 11. The system for remotely controlling household appliances as claimed in claim 8, characterized in that: After the home gateway is registered by the IP multimedia subsystem, the public user identity of the home gateway is bound to the home gateway IP address; After the home gateway completes the public user identity registration in the home subscriber server of the IP multimedia subsystem, it sets its own initial filtering rules in the home subscriber server through the application server, and through the home subscriber server of the IP multimedia subsystem and the application server Interact to modify the initial filtering rules. 12. The system for remotely controlling household electrical appliances as claimed in claim 11, characterized in that: The home gateway identifier includes: home gateway public user identity. 13. The system for remotely controlling household electrical appliances as claimed in claim 8, wherein the IP multimedia subsystem also performs proxy call session control and service session control, and the home gateway also performs query session control, service session control and proxy call session control, Wherein the proxy call session control of the IP multimedia subsystem is used to forward the SIP signaling to the service session control for the user service that initiates the message; The service session control of the IP multimedia subsystem is used to extract the user's initial filter rule from the home user server and evaluate it. If the evaluation result is to forward the request message to the destination, the home gateway in the request message is parsed The host part in the public user identity queries the inquiry session control in the home network, and forwards the request message to it; The inquiry session control of the home gateway is used to inquire the address of the service session control serving the home gateway from the local home network server, and send the request message to the address; The service session control of the home gateway is used to determine whether the requesting user terminal is allowed by the home gateway according to the initial filtering rules of the home gateway, and if allowed, send the request message to the proxy call session control; The proxy call session control of the home gateway is used to send the request message to the home gateway corresponding to the IP address according to the binding relationship between the public user identity and the home gateway IP address. 14. The system for remotely controlling household appliances as claimed in claim 10, characterized in that: The home gateway also sends a message to the user terminal, including: the media type supported by the home appliance; after knowing the media type supported by the user terminal, it sends a response message to the user terminal; The user terminal also determines the media type used for communication according to the media type supported by the home appliance and informs the home gateway.

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