CN110324817A - International roaming communication means, service control point node based on block chain - Google Patents

Abstract

The present disclosure provides a block chain-based international roaming communication method, the method comprising: a service control point node receiving a first call request sent by a first call session control function entity, and responding to the fact that the first call request is a group call request, Send the first broadcast message carrying the first called short number in the first call request in the blockchain network to which it belongs, and receive the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message Call the first called long number corresponding to the short number and the first operator information after the number portability, and send the first called long number and the first operator information to the first call session control function entity. The disclosure also provides a service control point node, a home user server node, and a call session control functional entity.

Description

Blockchain-based international roaming communication method, service control point node

technical field

Embodiments of the present disclosure relate to the technical field of blockchain, and in particular to a blockchain-based international roaming communication method, a service control point node, a home user server node, and a call session control functional entity.

Background technique

With the development of the Internet and blockchain technology, the Internet and blockchain technology are widely used in various fields. Due to the diversified needs of end users in the communication field, the Internet and blockchain technology are more popular in the communication field.

In the prior art, when a group user roams internationally, for example, the first group user A travels abroad or goes on a business trip, and calls the group user B of his country from abroad (that is, the short number that the group user A calls is the corresponding short number of the group user B), and the group When user B sets call forwarding, the international gateway office where group user A is located will send the call request to the international gateway office where group user B is located, and then the communication connection will be realized.

Contents of the invention

Embodiments of the present disclosure provide a blockchain-based international roaming communication method, a service control point node, a home user server node, and a call session control functional entity.

In the first aspect, the embodiment of the present disclosure provides a blockchain-based international roaming communication method, which is applied to a service control point node. When the calling number is an international roaming number and the called number is a non-international roaming number, it includes:

receiving a first call request sent by a first call session control function entity;

In response to the first call request being a group call request, sending a first broadcast message carrying the first called short number in the first call request in the blockchain network to which it belongs;

Receive the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the first operation after porting the number to the network. business information;

Send the first called long number and the first operator information to the first call session control function entity.

In some embodiments, the method also includes:

receiving the second broadcast message carrying the second called short number sent by the first service control point node in the blockchain network to which it belongs;

Selecting a second called long number corresponding to the second called short number from a preset long and short number comparison table;

Broadcasting the second called long number in the block chain network.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure also provide a blockchain-based international roaming communication method, which is applied to the home user server node. When the calling number is an international roaming number and the called number is a non- When roaming internationally, include:

In response to the third called long number sent by the second service control point node in the blockchain network to which it belongs, determine whether the third called long number has undergone number portability;

If yes, then determine the second operator information after the called third long number is ported;

Broadcasting the third called long number and the second operator information in the block chain network.

In some embodiments, the method also includes:

Responding to the fourth called long number and the third operator information broadcast by the second home user server node in the blockchain network to which it belongs, verifying the fourth called long number and the third operator information;

If the verification is passed, the fourth called long number and the third operator information are broadcast in the block chain network.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure also provide a blockchain-based international roaming communication method, which is applied to a call session control function entity. When the calling number is an international roaming number and the called number is For non-international roaming numbers, include:

determining the third service control point node corresponding to the calling number according to the received second call request;

sending the second call request to the third service control point node, and receiving the fifth called party corresponding to the third called short number in the second call request fed back by the third service control point node Long number and fourth operator information;

generating a first call invitation according to the fifth called long number and the second call request;

sending the first call invitation and the information of the fourth operator to the first international gateway, so that the first international gateway sends the first call invitation to the second Call session control functional entity.

In some embodiments, the method also includes:

receiving the second call invitation sent by the second international gateway office according to the information of the fifth operator;

sending the second call invitation to an application server;

If receiving the information fed back by the application server, the selected access domain is the IMS domain, then determining the service control point application server according to the subscription information corresponding to the sixth called long number in the second call invitation;

Send the second call invitation to the service control point application server.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure also provide a service control point node, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

A first receiving module, configured to receive a first call request sent by a first call session control function entity;

The first sending module is configured to send, in the blockchain network to which the first call request is a group call request, a first broadcast message carrying the first called short number in the first call request;

The first receiving module is further configured to receive the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the information of the first operator after porting the number;

The first sending module is further configured to send the first called long number and the first operator information to the first call session control function entity.

In some embodiments, also include:

The first receiving module is also used to receive the second broadcast message carrying the second called short number sent by the first service control point node in the block chain network to which it belongs;

A selection module, configured to select a second called long number corresponding to the second called short number from a preset long and short number comparison table;

The first broadcast module is used to broadcast the second called long number in the block chain network.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure also provide a home user server node, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

A judging module, configured to respond to the third called long number sent by the second service control point node in the blockchain network to which it belongs, and judge whether the third called long number has undergone number portability;

The first determination module is used to determine the information of the second operator after the third called long number is ported to the network if yes;

The second broadcast module is configured to broadcast the third called long number and the second operator information in the block chain network.

In some embodiments, also include:

A verification module, configured to verify the fourth called long number and the third operator in response to the fourth called long number and the third operator information broadcast by the second home user server node in the blockchain network to which it belongs. Verify the business information;

The second broadcast module is further configured to, if the verification is passed, broadcast the fourth called long number and the third operator information in the block chain network.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure also provide a call session control function entity, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

The second determination module is configured to determine the third service control point node corresponding to the calling number according to the received second call request;

a second sending module, configured to send the second call request to the third service control point node;

The second receiving module is configured to receive the fifth called long number and the fourth operator information corresponding to the third called short number in the second call request fed back by the third service control point node;

A generating module, configured to generate a first call invitation according to the fifth called long number and the second call request;

The second sending module is further configured to send the first call invitation and the fourth operator information to the first international gateway, so that the first international gateway will The first call invitation is sent to the second call session control function entity.

In some embodiments, also include:

The second receiving module is further configured to receive a second call invitation sent by the second international gateway office according to the information of the fifth operator;

The second sending module is further configured to send the second call invitation to an application server;

The second determining module is further configured to: if the access domain selected for the application server is the IMS domain according to the information fed back by the application server, according to the subscription corresponding to the sixth called long number in the second call invitation The information determines the service control point application server;

The second sending module is further configured to send the second call invitation to the service control point application server.

According to the embodiment of the present disclosure, when the calling number is an international roaming number and the called number is a non-international roaming number, the service control point node receives the first call request sent by the first call session control function entity, and responds to the first call The request is a group call request, and the first broadcast message carrying the first called short number in the first call request is sent in the blockchain network to which it belongs, and the first home user server node in the receiving blockchain network receives the first broadcast message based on the first broadcast message. The first called long number corresponding to the first called short number fed back by the message and the first operator information after the number portability is transferred to the network, and the first called long number and the first operator information are sent to the first call session control The technical solution of the functional entity avoids the problem that the call request cannot be answered in time in the prior art, resulting in the failure of the call to proceed normally, or the problem of prolonged time. By using the unique trust mechanism of the blockchain network to synchronize information between different operators , which is convenient for timely synchronization and supervision of information, and realizes the effect of ensuring normal communication of users.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of a blockchain-based international roaming communication method according to an embodiment of the present disclosure;

2 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure;

3 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure;

4 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure;

5 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure;

6 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a service control point node according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a home user server node according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a call session control function entity according to an embodiment of the present disclosure;

Reference signs:

1. The first receiving module, 2. The first sending module, 3. The selection module, 4. The first broadcast module, 5. The judgment module, 6. The first determination module, 7. The second broadcast module, 8. The verification module, 9. A second determining module, 10. A second sending module, 11. A second receiving module, 12. A generating module.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

According to an aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a blockchain-based international roaming communication method, which is applied to service control point nodes.

Please refer to FIG. 1 , which is a schematic diagram of a blockchain-based international roaming communication method according to an embodiment of the present disclosure.

As shown in Figure 1, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

In step S10, the service control point node receives the call request sent by the first call session control function entity.

S11: In response to the fact that the first call request is a group call request, the service control point node sends a first broadcast message carrying the first called short number in the first call request in the blockchain network to which it belongs.

S12: The service control point node receives the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the first operation after the number portability transfer. supplier information.

S13: The service control point node sends the first called long number and the first operator information to the first call session control function entity.

It can be understood that calling and called are relative concepts. That is to say, the currently calling user (or number) may be the called user (or number) in other call relationships.

Similarly, the service control point node is the calling service control point node in some call relationships, and is the called service control point node in some call relationships.

In this embodiment, when the service control point node is the calling service control point node, the first call session control function entity is the calling call session control function entity, and the first home user server node is the called home The user server node, and the first home user server node is specifically the home user server node after the called number portability.

As can be seen with reference to FIG. 2, in some embodiments, the method further includes:

S20: The service control point node receives the second broadcast message carrying the second called short number sent by the first service control point node in the blockchain network to which it belongs.

S21: The service control point node selects the second called long number corresponding to the second called short number from the preset long and short number comparison table;

S22: The service control point node broadcasts the second called long number in the blockchain network.

In this embodiment, when the service control point node is the called service control point node, the first CSCF entity is the calling CSCF entity.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a blockchain-based international roaming communication method, which is applied to a home user server node.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure.

As shown in Figure 3, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

S30: The home user server node responds to the third called long number sent by the second service control point node in the blockchain network to which it belongs based on the call request, and determines whether the third called long number has undergone number portability.

If yes, execute S31: the home user server node determines the information of the second operator after the third called long number is ported to the network.

S32: The home user server node broadcasts the third called long number and the second operator information in the blockchain network.

Similarly, the home user server node may be the home user server node of the calling party, or may be the home user server node. And when there is a number portability event, the home user server node may be the home user server node of the called party before the number portability, and may also be the home user server node of the calling party before the number portability.

In this embodiment, when the home user server node is the home user server node before the called number portability transfer, the second service control point node is the called service control point node.

As can be seen with reference to FIG. 4, in some embodiments, the method further includes:

S40: The home user server node performs the fourth called long number and the third operator information in response to the fourth called long number and the third operator information broadcast by the second home user server node in the blockchain network to which it belongs. verify.

If the verification is passed, execute S41: the home user server node broadcasts the fourth called long number and the third operator information in the blockchain network.

In this embodiment, when the home user server node is the home user server node of the called party after porting the number, the second home user server node is the home user server node of the called party before porting the number.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a blockchain-based international roaming communication method, which is applied to a call session control function entity.

Please refer to FIG. 5 . FIG. 5 is a schematic diagram of a blockchain-based international roaming communication method according to another embodiment of the present disclosure.

As shown in Figure 5, when the calling number is an international roaming number and the called number is a non-international roaming number, including:

S50: The call session control function entity determines the third service control point node corresponding to the calling number according to the received second call request.

S51: The call session control function entity sends the second call request to the third service control point node, and receives the fifth called long number corresponding to the third called short number in the second call request fed back by the third service control point node number and fourth operator information.

S52: The call session control function entity generates a first call invitation according to the fifth called long number and the second call request.

S53: The call session control functional entity sends the first call invitation and the fourth operator information to the first international gateway office, so that the first international gateway office sends the first call invitation to the second call session control office according to the fourth operator information functional entities.

Similarly, the CSCF entity may be the calling CSCF entity, or may be the called CSCF entity. In this embodiment, when the call session control function entity is the caller's call session control function entity, the third service control point node is the caller's service control point node, and the first international gateway office is the caller's international gateway In the office, the second call session control function entity is the called call session control function entity.

As can be seen in conjunction with Figure 6, the method also includes:

S60: The call session control function entity receives the second call invitation sent by the second international gateway according to the information of the fifth operator.

S61: The CSCF entity sends the second call invitation to the application server.

S62: If the call session control function entity receives the information fed back by the application server and the access domain selected for it is the IMS domain, determine the service control point application server according to the subscription information corresponding to the sixth called long number in the second call invitation .

S63: The CSCF entity sends the second call invitation to the service control point application server.

In this embodiment, when the call session control function entity is the called call session control function entity, the second international gateway is the calling international gateway, the application server is the called application server, and the service control point application The server is the application server of the called service control point.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a service control point node.

Please refer to FIG. 7 . FIG. 7 is a schematic diagram of a service control point node according to an embodiment of the present disclosure.

As shown in Figure 7, when the calling number is an international roaming number and the called number is a non-international roaming number, the service control point nodes include:

The first receiving module 1 is configured to receive a first call request sent by a first call session control function entity;

The first sending module 2 is configured to send a first broadcast message carrying the first called short number in the first call request in the block chain network to which it belongs in response to the first call request being a group call request;

The first receiving module 1 is also used to receive the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the number after the number portability transfer. First operator information;

The first sending module 2 is further configured to send the first called long number and the first operator information to the first call session control function entity.

As can be seen in conjunction with FIG. 7, in some embodiments, the service control point node further includes:

The first receiving module 1 is also used to receive the second broadcast message carrying the second called short number sent by the first service control point node in the block chain network to which it belongs;

Selection module 3, for selecting the second called long number corresponding to the second called short number from the preset long and short number comparison table;

The first broadcast module 4 is used for broadcasting the second called long number in the blockchain network.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a home user server node before the called number portability.

Please refer to FIG. 8 . FIG. 8 is a schematic diagram of a home user server node according to an embodiment of the present disclosure.

As shown in Figure 8, when the calling number is an international roaming number and the called number is a non-international roaming number, the home user server node includes:

Judging module 5, configured to respond to the third called long number sent by the second service control point node in the blockchain network to which it belongs, and judge whether the third called long number has undergone number portability;

The first determination module 6 is used to determine the second operator information after the third called long number is ported to the network if yes;

The second broadcast module 7 is used to broadcast the third called long number and the second operator information in the block chain network.

As can be seen in conjunction with FIG. 8, in some embodiments, the home user server node further includes:

The verification module 8 is configured to perform the fourth called long number and the third operator information in response to the fourth called long number and the third operator information broadcast by the second home user server node in the block chain network to which it belongs. verify;

The second broadcast module 7 is also used to broadcast the fourth called long number and the third operator information in the block chain network if the verification is passed.

According to another aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a call session control function entity.

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of a call session control function entity according to an embodiment of the present disclosure.

As shown in Figure 9, when the calling number is an international roaming number and the called number is a non-international roaming number, the call session control functional entities include:

The second determination module 9 is configured to determine the third service control point node corresponding to the calling number according to the received second call request;

The second sending module 10 is configured to send the second call request to the third service control point node;

The second receiving module 11 is configured to receive the fifth called long number and the fourth operator information corresponding to the third called short number in the second call request fed back by the third service control point node;

A generating module 12, configured to generate a first call invitation according to the fifth called long number and the second call request;

The second sending module 10 is also used to send the first call invitation and the fourth operator information to the first international gateway, so that the first international gateway sends the first call invitation to the second caller according to the fourth operator information. Session control functional entity.

In some embodiments, the second receiving module 11 is also used to receive the second call invitation sent by the second international gateway office according to the information of the fifth operator; the second sending module 10 is also used to send the second call invitation to the application server The second determination module 9 is also used to determine the application of the service control point according to the subscription information corresponding to the sixth called long number in the second call invitation if the access domain selected for it by receiving the information fed back by the application server is an IMS domain Server; the second sending module 10 is also configured to send the second call invitation to the service control point application server.

In order to have a more thorough understanding of the solutions of the embodiments of the present disclosure, the solutions of the embodiments of the present disclosure will now be described in detail with reference to specific examples. Among them, the first user and the second user are two users of the same group, both users have subscribed to the VoLTE service, and both are China Unicom users. And the second user handles the number portability transfer, that is, the second user becomes a mobile user from a Unicom user portability transfer. In order to meet work needs, the first user travels from China to the United States, and sends a call request to the second user in the United States. specifically:

It is understandable that after the first user is in the United States, he needs to register in the United States. If the first user registers the IMS domain in the United States, the process of registration and authentication needs to be completed. For the specific registration process, please refer to the prior art.

When the first user (ie, the calling user) calls the second user (ie, the called user), that is, when the first user dials the short number of the second user through the user terminal UE-A, it is necessary to first establish the connection between the user terminal UE-A and U.S. Base Station, U.S. Mobile Management Entity and other communication connections. For the specific registration process, please refer to the prior art. (Specifically, the terminal can be a mobile device such as a mobile phone, a notebook computer, a tablet computer, a personal digital assistant, etc., or a fixed device such as a desktop computer, etc.) It can also be realized by the following methods:

The user terminal UE-A initiates a service request message to the US base station.

The base station in the United States forwards the service request information to the mobile management entity in the United States. According to the policy of the operator's network in the United States, security procedures can be performed.

The mobility management entity in the United States initiates a wireless connection establishment request to the base station in the United States and sends a UE-A message, and the base station in the United States establishes a related radio bearer.

The user terminal UE-A sends a call request to the base station in the United States, the base station in the United States forwards the call request to the serving gateway in the United States, and the serving gateway in the United States forwards the call request to the proxy gateway in the United States. The serving gateway in the United States forwards the call request to the CSCF entity in the United States (that is, the calling CSCF entity, hereinafter referred to as the CSCF entity in the United States).

The base station in the United States replies a wireless connection establishment request response message to the MME in the United States, and the MME in the United States sends a bearer modification message to the serving gateway in the United States, and the serving gateway in the United States can then send downlink data to the base station in the United States.

The US serving gateway decides whether to initiate a bearer modification process to the US proxy gateway based on the subscription status, the US proxy gateway replies a bearer modification response message to the US serving gateway, and the US serving gateway replies a bearer modification response message to the US MME.

After receiving the bearer modification response message returned by the MME of the United States, the call session control function entity of the United States triggers the service control point (SCP) node of the United States according to the subscription information of the first user in the call request (that is, the called service The control point node, hereinafter referred to as the service control point (SCP) node in the United States, and the full name of SCP is ServiceControl Point), which carries the calling number and the called number. The calling number is a long number, and the called number is a short number.

The service control point (SCP) node in the United States knows that the first user is a group user according to the subscription information when the calling number is registered in the American network, and determines that the call is an intra-group call according to the called number and calling number .

Among them, the blockchain network also includes the following nodes: China Unicom Service Control Point (SCP) node, Telecom Service Control Point (SCP) node, Mobile Service Control Point (SCP) node and other national operators’ Service Control Points (SCP) Node, China Unicom Home Subscriber Server node (China Unicom HSS node, Home Subscriber Sever, HSS for short), China Unicom HSS-2 node, China Unicom HSS-n node, China Mobile HSS-1 node, China Mobile HSS-2 node , China Mobile HSS-n node, China Telecom HSS-1 node, China Telecom HSS-2 node, China Telecom HSS-n node, and HSS nodes operated by other countries.

In other words, the US Service Control Point (SCP) node is a node of the blockchain network. The steps for any service control point (SCP) to become a node of the blockchain network include: the service control point (SCP) sends a registration request to the blockchain network, and the registration request carries relevant information of the service control point (SCP), such as Operator information, address information, etc., the blockchain network verifies the registration request sent by the service control point (SCP), that is, verifies the operator information and address information, and when the verification is passed, the registration request in the blockchain network Broadcast the message that the service control point (SCP) becomes its node, and obtain the service control point (SCP) node.

The service control point (SCP) node of the United States sends a broadcast message in the blockchain network. The content of the broadcast message includes the calling number (long number) and the called number (short number). The broadcast message uses the service control point of the United States (SCP) The private key of the node is signed and broadcasted.

The service control point (SCP) nodes of operators in various countries in the blockchain network received the broadcast message. According to the number segment of the calling number (long number) 18601101234 in the broadcast message, the Chinese operator Unicom business The control point (SCP) node queries its internal long and short number comparison table to obtain the long number of the called number.

China's Unicom Service Control Point (SCP) node sends the long number of the called number that it has queried to the blockchain network. The broadcast message includes: the short number of the called number 665678, the long number of the called number 18601105678, The broadcast message is broadcasted after signing with the private key of China Unicom Service Control Point (SCP) node.

After the China Unicom HSS node receives the broadcast message, it finds that the called number 18601105678 has been transferred from China Unicom to China Mobile, then the China Unicom HSS node sends a broadcast message in the blockchain network. The content of the information is as follows: China Unicom HSS node identification + public key, mobile phone number 18601105678, the number has been ported to China Mobile, and the identification of China Mobile. The China Unicom HSS node sends the broadcast information after signing with its own private key.

After receiving the broadcast message, the China Mobile HSS node will query the number 18601105678. If it is confirmed that the number is its own user, the China Mobile HSS node will send a broadcast message in the blockchain network. The content of the broadcast broadcast information is as follows : China Mobile HSS node identification + public key, mobile phone number 18601105678, this number has been ported to China Mobile, China Mobile HSS node uses its own private key to sign and send the broadcast information.

The service control point (SCP) node in the United States receives the broadcast message, extracts the correspondence between the long and short numbers of the called number in the broadcast message and the information that the operator of the called number is China Mobile. The point (SCP) node generates a call invitation according to the called long number and the call request. The called number in the call invitation is the called long number (the called short number before), and sends the call to the call session control function entity in the United States invite.

The call session control function entity in the United States sends the call invitation to the international gateway office in the United States according to the called long number, the country (namely China) of the operator to which it belongs, and the identifier of the mobile operator.

The international gateway office of the United States sends the call invitation to the corresponding Chinese international gateway office of China Mobile, and then the international gateway office of China sends the call invitation to the call session control function entity of the mobile where the called user is located (that is, the called call session control function entity).

The call session control functional entity of China Mobile sends the call invitation to the application server AS of China Mobile. AS needs China Mobile's inquiry number to carry the home location register to select the terminal access domain. Carry out the call connection process. After receiving the call invitation, the mobile call session control function entity triggers the call invitation to the service control point (SCP) application server of China Mobile according to the subscription information of the second user.

After China Mobile's service control point (SCP) application server receives the call invitation, it obtains the calling number from the call invitation, judges through the field that the first user has dialed a short number, and the second user's call is displayed as a short number.

The service control point (SCP) application server of China Mobile queries the location information of the second user. China Mobile's Service Control Point (SCP) application server sends a call invitation to China Mobile's call session control function entity to route the second user. If the short number is displayed, the user terminal UE-B of the second user displays the first The user's short number.

China Mobile's call session control function entity triggers China Mobile's application server, and China Mobile's application server provides basic services and routing domain selection, and finally routes the called user terminal UE-B of the second user.

After the user terminal UE-B receives the call request, it first displays the short number according to the header field (FROM), and establishes the session through subsequent message interaction. The call session control function entity in the United States sends a called response message to the user terminal UE-A, and the user terminal UE-A sends an end message. After receiving the end message, the service control point (SCP) application server of China Mobile writes a bill and releases the session.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (12)

1. A block chain-based international roaming communication method, which is applied to a service control point node, is characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the international roaming communication method include: receiving a first call request sent by a first call session control function entity; In response to the first call request being a group call request, sending a first broadcast message carrying the first called short number in the first call request in the blockchain network to which it belongs; Receive the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the first operation after porting the number to the network. business information; Send the first called long number and the first operator information to the first call session control function entity. 2. The international roaming communication method according to claim 1, characterized in that, the international roaming communication method further comprises: receiving the second broadcast message carrying the second called short number sent by the first service control point node in the blockchain network to which it belongs; Selecting a second called long number corresponding to the second called short number from a preset long and short number comparison table; Broadcasting the second called long number in the block chain network. 3. A blockchain-based international roaming communication method, applied to a home user server node, characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the international roaming communication method include: In response to the third called long number sent by the second service control point node in the blockchain network to which it belongs, determine whether the third called long number has undergone number portability; If yes, then determine the second operator information after the called third long number is ported; Broadcasting the third called long number and the second operator information in the block chain network. 4. The international roaming communication method according to claim 3, characterized in that the international roaming communication method further comprises: Responding to the fourth called long number and the third operator information broadcast by the second home user server node in the blockchain network to which it belongs, verifying the fourth called long number and the third operator information; If the verification is passed, the fourth called long number and the third operator information are broadcast in the block chain network. 5. A blockchain-based international roaming communication method, applied to a call session control function entity, characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the international roaming communication Methods include: determining the third service control point node corresponding to the calling number according to the received second call request; sending the second call request to the third service control point node, and receiving the fifth called party corresponding to the third called short number in the second call request fed back by the third service control point node Long number and fourth operator information; generating a first call invitation according to the fifth called long number and the second call request; sending the first call invitation and the information of the fourth operator to the first international gateway, so that the first international gateway sends the first call invitation to the second Call session control functional entity. 6. The international roaming communication method according to claim 5, characterized in that the method further comprises: receiving the second call invitation sent by the second international gateway office according to the information of the fifth operator; sending the second call invitation to an application server; If receiving the information fed back by the application server, the selected access domain is the IMS domain, then determining the service control point application server according to the subscription information corresponding to the sixth called long number in the second call invitation; Send the second call invitation to the service control point application server. 7. A service control point node, characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the service control point node includes: A first receiving module, configured to receive a first call request sent by a first call session control function entity; The first sending module is configured to send, in the blockchain network to which the first call request is a group call request, a first broadcast message carrying the first called short number in the first call request; The first receiving module is further configured to receive the first called long number corresponding to the first called short number fed back by the first home user server node in the blockchain network based on the first broadcast message and the information of the first operator after porting the number; The first sending module is further configured to send the first called long number and the first operator information to the first call session control function entity. 8. The service control point node according to claim 7, further comprising: The first receiving module is also used to receive the second broadcast message carrying the second called short number sent by the first service control point node in the block chain network to which it belongs; A selection module, configured to select a second called long number corresponding to the second called short number from a preset long and short number comparison table; The first broadcast module is used to broadcast the second called long number in the block chain network. 9. A home user server node, characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the home server node includes: A judging module, configured to respond to the third called long number sent by the second service control point node in the blockchain network to which it belongs, and judge whether the third called long number has undergone number portability; The first determination module is used to determine the information of the second operator after the third called long number is ported to the network if yes; The second broadcast module is configured to broadcast the third called long number and the second operator information in the block chain network. 10. The home user server node according to claim 9, further comprising: A verification module, configured to verify the fourth called long number and the third operator in response to the fourth called long number and the third operator information broadcast by the second home user server node in the blockchain network to which it belongs. Verify the business information; The second broadcast module is further configured to, if the verification is passed, broadcast the fourth called long number and the third operator information in the block chain network. 11. A call session control function entity, characterized in that, when the calling number is an international roaming number and the called number is a non-international roaming number, the call session control function entity includes: The second determination module is configured to determine the third service control point node corresponding to the calling number according to the received second call request; a second sending module, configured to send the second call request to the third service control point node; The second receiving module is configured to receive the fifth called long number and the fourth operator information corresponding to the third called short number in the second call request fed back by the third service control point node; A generating module, configured to generate a first call invitation according to the fifth called long number and the second call request; The second sending module is further configured to send the first call invitation and the fourth operator information to the first international gateway, so that the first international gateway will The first call invitation is sent to the second call session control function entity. 12. The call session control function entity according to claim 11, characterized in that, The second receiving module is further configured to receive a second call invitation sent by the second international gateway office according to the information of the fifth operator; The second sending module is further configured to send the second call invitation to an application server; The second determining module is further configured to: if the access domain selected for the application server is the IMS domain according to the information fed back by the application server, according to the subscription corresponding to the sixth called long number in the second call invitation The information determines the service control point application server; The second sending module is further configured to send the second call invitation to the service control point application server.