CN109995572B - Topology hiding method and device - Google Patents

Abstract

The invention discloses a topology hiding method and device, which are used to solve the problem that the topology hiding scheme of the 4G network in the prior art is not suitable for the 5G network. In the embodiment of the present invention, a topology hiding unit is set to determine the hidden ID of the network element of the local network, and the hidden ID is used to establish a connection with the network element of the external network. An address hiding unit is also added to determine the hidden address of the network element on the local network, replace the real address with the hidden address and send it to the external network element, or replace the hidden address with the real address and send it to the network element on the local network. In the embodiment of the present invention, the new topology hiding unit assigns the hidden ID, and the newly added address hiding unit determines the hidden address and replaces the real address of the network element of the local network, and the routing node is no longer used to realize topology hiding. Therefore, it can solve the problem in the 5G network. Because no routing node is introduced, topology hiding and address hiding of network element identifiers cannot be implemented, and addresses and identifiers cannot be translated and recovered during the addressing process.

Description

A method and device for topology hiding

technical field

The present invention relates to the technical field of core networks, in particular to a method and device for topology hiding.

Background technique

There will be media communication between different operators. Each node in the core network will add its own information to the signaling so that the signaling can interact normally. If the information of these nodes is not controlled, it will be transmitted to the operator. outside the business network. If the information of these nodes is added and controlled, the internal topology structure of an operator will be exposed, which will become a security risk of the core network. Therefore, it is necessary to hide the topology of the local network, replace the real network element identifier, and hide the signaling route in the network without violating the protocol standard.

In the 4G network, the source network element of the local network replaces the real network element identifier through the I-DRA (international-Diameter Routing Agent, international Diameter Routing Agent node) node of the signaling network, and hides the signaling routes in the local network and the transmission of the local network. The source host name in the request message and the response message generates a topology hiding mapping table, and the I-DRA node maintains the topology hiding mapping table and routes the signaling. The destination network element receives the message through the I-DRA node of the signaling network, and translates and restores the replaced network element identifier in the message to realize addressing within the network.

However, in the 5G network, the signaling route between NF (Network Function, network function) adopts direct connection, and does not introduce routing nodes, so the addresses of source nodes and destination nodes cannot be hidden through routing nodes, and the signaling addresses Translation recovery of destination addresses and identifiers is not supported in the process.

To sum up, the current topology hiding scheme of 4G network is not suitable for 5G network.

SUMMARY OF THE INVENTION

The present invention provides a method and device for topology hiding, which are used to solve the problem that the topology hiding scheme of 4G network in the prior art is not suitable for 5G network.

An embodiment of the present invention provides a method for topology hiding, and the method includes:

After the network element of the local network and the network element of the external network need to be accessed directly, the topology hiding unit determines the hidden ID of the network element of the local network according to the real ID of the network element of the local network;

The topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network according to the real address, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network.

Optionally, the topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network according to the real address, including:

The topology hiding unit sends the determined hiding ID of the network element of the own network to the network element of the own network through a topology hiding response or a topology hiding notification.

Optionally, if the topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network through the topology hiding notification, before the topology hiding unit determines the hidden ID of the network element of the local network, it also includes:

The topology hiding unit sends a service discovery request including the ID of the external network element to the network storage function NRF of the local network after receiving the application layer access request containing the identifier of the external network element sent by the external network element;

The topology hiding unit receives a service discovery response request including the real ID and real address of at least one local network element from the local network NRF;

The topology hiding unit sends the determined hidden ID of the local network element to the local network element by sending a topology hiding notification, including:

The topology hiding unit sends a topology hiding notification including the hiding ID of the network element of the own network to the network element of the own network.

Optionally, after the topology hiding unit receives a service discovery response request from the local network NRF that includes the real ID and real address of at least one local network element, it further includes:

If the service discovery response request sent by the local network NRF contains the real IDs and real addresses of multiple local network elements, the topology hiding unit will send the local network element to the local network element according to the attribution relationship between the local network element and the IP address. The corresponding address hiding unit sends an address hiding request.

Optionally, after the topology hiding unit sends the topology hiding notification including the hidden ID of the network element of the local network to the network element of the local network, the method further includes:

After receiving the address hiding response sent by the address hiding unit, the topology hiding unit sends an application layer service access response including the hidden ID and hidden address of the network element of the local network to the external network element.

Optionally, if the topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network by sending a topology hiding response, before the topology hiding unit determines the hidden ID of the network element of the local network, it also includes: :

The topology hiding unit receives a topology hiding request carrying the real ID of the network element of the own network from the network element of the own network;

The topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network through a topology hiding response, including:

The topology hiding unit sends a topology hiding response including the hiding ID of the network element of the own network to the network element of the own network.

An embodiment of the present invention provides a method for topology hiding, and the method includes:

The address hiding unit determines the hidden address of the network element of this network;

After receiving the message sent by the network element of the local network to the network element of the external network, the address hiding unit replaces the address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network, and After receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the real address of the local network element and send it to the local network element.

Optionally, before the address hiding unit determines the hidden address of the network element of the local network, it further includes:

The address hiding unit receives an address hiding request including the real address of the network element of the local network from the topology hiding unit;

The address hiding unit sends the determined hidden address of the network element of the local network to the topology hiding unit, including:

The address hiding unit sends an address hiding response including the hiding address of the network element of the local network to the topology hiding unit.

An embodiment of the present invention provides a method for topology hiding, and the method includes:

The network element of the local network receives the hidden ID of the network element of the local network sent by the topology hiding unit; the network element of the local network establishes a connection with the network element of the external network through the address hiding unit;

When the local network element sends a message to an external network element, it replaces the ID in the message with a hidden ID, and sends it to the address hiding unit, so that the address hiding unit replaces the real address in the message. The hidden address of the network element of the local network is sent to the network element of the external network.

Optionally, before the local network element receives the hidden ID of the local network element sent by the topology hiding unit, the method further includes:

When the network element of the local network needs to access the network element of the external network in a direct way, it sends a topology hiding request to the topology hiding unit.

Optionally, after the local network element receives the hidden ID of the local network element sent by the topology hiding unit, the method further includes:

The local network element stores the hidden ID of the local network element for use in subsequent signaling interworking.

Optionally, the message sent by the local network element to the external network element is an application layer service access request message or an application layer service access response message.

An embodiment of the present invention provides a method for topology hiding, and the method includes:

When the external network element needs to access the local network element in a direct way, it sends an application layer service access request to the topology hidden unit according to the address of the topology hidden unit returned by the external network NRF;

The external network element receives the application layer service access response that includes the hidden ID and the hidden address of the network element of the local network and is sent by the topology hiding unit;

The external network element performs signaling intercommunication with the local network element through the address hiding unit according to the hidden ID and hidden address of the local network element.

Optionally, before the external network element requests the ID and address of the local network element from the topology hiding unit, the method further includes:

The external network element sends a service discovery request to the external network NRF.

Optionally, after the external network element receives the application layer service access response including the hidden ID and the hidden address of the local network element and sent by the topology hiding unit, the method further includes:

The external network element stores the hidden ID of the local network element for use in subsequent signaling interworking.

An embodiment of the present invention provides a topology hiding device, including: a processor and a transceiver:

The processor is used to determine the hidden ID of the network element of the local network according to the real ID of the network element of the local network after the network element of the local network and the network element of the external network need to be accessed in a direct way; The hidden ID of the element is sent to the network element of the local network through the transceiver, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network.

Optionally, the processor is also specifically used for:

The determined hidden ID of the local network element is sent to the local network element through the topology hiding response or the topology hiding notification.

Optionally, the processor is also specifically used for:

Before sending the determined hidden ID of the local network element to the local network element through the topology hidden notification and determining the hidden ID of the local network element, receive the application layer access sent by the external network element including the external network element identifier After the request, send a service discovery request containing the ID of the external network element to the local network storage function NRF; receive a service discovery response request containing the real ID and real address of at least one local network element from the local network NRF ; Send the topology hidden notification including the hidden ID of the network element of the local network to the network element of the local network.

Optionally, the processor is also specifically used for:

After receiving a service discovery response request including the real ID and real address of at least one local network element from the local network NRF through the transceiver, if the service discovery response request sent by the local network NRF contains multiple local network elements If the real ID and real address of the network element of the network are used, the address hiding request is sent to the address hiding unit corresponding to the network element of the network according to the attribution relationship between the network element of the network element and the IP address of the network element.

Optionally, the processor is also specifically used for:

After receiving the address hiding response sent by the address hiding unit, send the application layer service access response including the hidden ID and the hidden address of the network element of the local network to the external network element.

Optionally, the processor is also specifically used for:

If the determined hidden ID of the local network element is sent to the local network element by sending the topology hidden response, before the unit determines the hidden ID of the local network element, the transceiver receives the information from the local network element carrying the local network element through the transceiver. The topology hiding request of the real ID; the topology hiding response including the hidden ID of the network element of the local network is sent to the network element of the local network through the transceiver.

An embodiment of the present invention provides a topology hiding device, including: a processor and a transceiver:

The processor is used to determine the hidden address of the network element of the local network; after receiving the message sent by the network element of the local network to the network element of the external network through the transceiver, replace the address in the message with the network element of the local network After receiving the message sent by the external network element to the local network element through the transceiver, replace the hidden address of the local network element with the real address of the local network element It is sent to the network element of this network.

Optionally, the processor is also specifically used for:

Before the unit determines the hidden address of the network element of the own network, the transceiver receives an address hiding request containing the real address of the network element of the own network from the topology hiding unit; hides the address containing the hidden address of the network element of the own network The response is sent to the topological hidden unit.

An embodiment of the present invention provides a topology hiding device, including: a processor and a transceiver:

The processor is configured to receive, through the transceiver, the hidden ID of the network element of the local network sent by the topology hiding unit; establish a connection with the network element of the external network through the address hiding unit; send a message to the network element of the external network When replacing the ID in the message with a hidden ID, send it to the address hiding unit, so that the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the address hiding unit. the external network element.

Optionally, the processor is also specifically used for:

Before receiving the hidden ID of the network element of the local network sent by the topology hiding unit, when it is necessary to access the network element of the external network in a direct way, a topology hiding request is sent to the topology hiding unit through the transceiver.

Optionally, the processor is also specifically used for:

After receiving the hidden ID of the network element of the local network sent by the topology hiding unit through the transceiver, the hidden ID of the network element of the local network is stored for use in subsequent signaling interworking.

Optionally, the message sent to the external network element is an application layer service access request message or an application layer service access response message.

An embodiment of the present invention provides a topology hiding device, including: a processor and a transceiver:

The processor is configured to send an application layer service access request to the topology hidden unit according to the address of the topology hidden unit returned by the external network NRF when it is necessary to access the network element of the local network in a direct manner; receive the topology hidden unit through a transceiver The sent application layer service access response including the hidden ID and hidden address of the network element of the local network; according to the hidden ID and hidden address of the network element of the local network, signaling is performed with the network element of the local network through the address hiding unit Intercommunication.

Optionally, the processor is also specifically used for:

Before requesting the ID and address of the network element of the local network from the topology hiding unit, a service discovery request is sent to the external network NRF.

Optionally, the processor is also specifically used for:

After receiving the application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the topology hiding unit through the transceiver, the hidden ID of the network element of the local network is stored for subsequent signaling interworking use.

The embodiment of the present invention also provides a topology hiding device, including:

The first determination module is used to determine the hidden ID of the network element of the local network according to the real ID of the network element of the local network after the network element of the local network and the network element of the external network need to be accessed in a direct way;

The first sending module is used for the unit to send the determined hidden ID of the network element of the local network to the network element of the local network according to the real address, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network .

The embodiment of the present invention also provides a topology hiding device, including:

The second determination module is used to determine the hidden address of the network element of this network;

The second sending module is configured to, after receiving the message sent by the network element of the local network to the network element of the external network, replace the address in the message with the hidden address of the network element of the local network and send it to the network element of the external network , and after receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the real address of the local network element and send it to the local network element.

The embodiment of the present invention also provides a topology hiding device, including:

a third determining module, configured to receive the hidden ID of the network element of the local network sent by the topology hiding unit; the network element of the local network establishes a connection with the network element of the external network through the address hiding unit;

The third sending module is configured to replace the ID in the message with a hidden ID when sending a message to an external network element, and send it to the address hiding unit, so that the address hiding unit can convert the real address in the message to the address hiding unit. After being replaced with the hidden address of the network element of the local network, it is sent to the network element of the external network.

The embodiment of the present invention also provides a topology hiding device, including:

The fourth sending module is used to send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external network NRF when it is necessary to access the network element of the local network in a direct way;

The fourth determination module is configured to receive the application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the topology hiding unit; according to the hidden ID and hidden address of the network element of the local network, through the The address hiding unit performs signaling intercommunication with the local network element.

An embodiment of the present invention further provides a topology hiding device, the device includes: at least one processing unit and at least one storage unit, wherein the storage unit stores program codes, and when the program codes are executed by the processing unit , causing the processing unit to execute:

the step of topology hiding by the topology hiding unit; or

The address hiding unit performs a step of topology hiding; or

The step of performing topology hiding by the network element of the local network; or

The step of performing topology hiding by the external network element.

In this embodiment of the present invention, a topology hiding unit is set, and after the network element of the local network and the network element of the external network need to be accessed in a direct way, the hidden ID of the network element of the local network is determined, and the network element of the local network adopts the hidden ID and the network element of the external network. Meta establishes a connection. An address hiding unit is also added to determine the hidden address of the network element of the local network, and the network element of the local network replaces the address in the message with the hidden address of the network element of the local network when the network element of the local network sends a message to the network element of the external network. To the external network element, and when receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the address of the local network element and send the message to the local network element. In the embodiment of the present invention, a new topology hiding unit assigns a hidden ID to the network element of the own network, and the newly added address hiding unit determines the hidden address of the network element of the own network and replaces the address when the network element of the own network is connected with the network element of the external network. , the routing node is no longer used to achieve topology hiding, so it can solve the problem that the network element identification topology hiding and address hiding cannot be realized because the direct connection is not introduced in the 5G network, and the address and identification cannot be translated during the addressing process. recovery problem.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a schematic diagram of a system structure of a method for topology hiding according to an embodiment of the present invention;

2 is a schematic diagram of a device structure of a topology hiding unit of a first topology hiding according to an embodiment of the present invention;

3 is a schematic diagram of a device structure of a first topology-hiding address hiding unit according to an embodiment of the present invention;

4 is a schematic structural diagram of a local network element of a first topology hiding device according to an embodiment of the present invention;

5 is a schematic structural diagram of an external network element of a first topology hiding device according to an embodiment of the present invention;

6 is a schematic structural diagram of another topology hiding device according to an embodiment of the present invention;

7 is a schematic diagram of a device structure of a topology hiding unit of the first topology hiding according to an embodiment of the present invention;

8 is a schematic diagram of a device structure of a first topology-hiding address hiding unit according to an embodiment of the present invention;

9 is a schematic structural diagram of a local network element of a first topology hiding device according to an embodiment of the present invention;

10 is a schematic structural diagram of an external network element of a first topology hiding device according to an embodiment of the present invention;

11 is a schematic flowchart of a topology hiding unit of a topology hiding method according to an embodiment of the present invention;

12 is a schematic flowchart of an address hiding unit of a topology hiding method according to an embodiment of the present invention;

13 is a schematic flowchart of a network element of a local network of a topology hiding method according to an embodiment of the present invention;

14 is a schematic flowchart of an external network element of a topology hiding method according to an embodiment of the present invention;

15 is a schematic flowchart of a complete method of a first topology hiding method according to an embodiment of the present invention;

16 is a schematic flowchart of a complete method of a second topology hiding method according to an embodiment of the present invention;

17 is a schematic flowchart of a complete method of a third topology hiding method according to an embodiment of the present invention;

FIG. 18 is a schematic flowchart of a complete method of a fourth topology hiding method according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

For the 5G network roaming architecture, no matter what topology hiding mechanism is deployed by an operator, it is transparent to other operators at the business process level. Therefore, the solution of the embodiment of the present invention does not limit the topology hiding mechanism of the external network, and the external network may deploy the same network The same topology hiding mechanism, possibly other mechanisms as well.

As shown in FIG. 1 , the system for performing topology hiding according to the embodiment of the present invention includes: a topology hiding unit 10 , an address hiding unit 11 , a network element 12 of the local network, and a network element 13 of an external network.

The topology hiding unit 10 is used to determine the hidden ID of the network element of the local network according to the real ID of the network element of the local network after the network element of the local network and the network element of the external network need to be accessed in a direct way; The hidden ID of the element is sent to the network element of the local network, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network.

The address hiding unit 11 is configured to determine the hidden address of the network element of the local network; after receiving the message sent by the network element of the local network to the network element of the external network, replace the address in the message with the hidden address of the network element of the local network After receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the address of the local network element and send it to the local network element.

The network element 12 of the local network is used for receiving the hidden ID of the network element of the local network sent by the topology hiding unit; establishing a connection with the network element of the external network through the address hiding unit; when sending a message to the network element of the external network , replace the ID in the message with a hidden ID, and send it to the address hiding unit, so that the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the address hiding unit. External network element.

The external network element 13 is used to send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external network NRF when it is necessary to access the network element of the local network in a direct manner; The application layer service access response including the hidden ID and hidden address of the local network element; according to the hidden ID and hidden address of the local network element, the address hiding unit performs signaling intercommunication with the local network element.

The local network refers to the operator network to which the network element belongs, and the external network refers to other operator networks to which the network element belongs. For example, when the local network is China Mobile, the external network is another operator's network; the address is the signaling connection address used by the network element to establish a connection with its external network element.

In this embodiment of the present invention, a topology hiding unit is set, and after the network element of the local network and the network element of the external network need to be accessed in a direct way, the hidden ID of the network element of the local network is determined, and the network element of the local network adopts the hidden ID and the network element of the external network. Meta establishes a connection. An address hiding unit is also added to determine the hidden address of the network element of the local network, and the network element of the local network replaces the address in the message with the hidden address of the network element of the local network when the network element of the local network sends a message to the network element of the external network. To the external network element, and when receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the address of the local network element and send the message to the local network element. In the embodiment of the present invention, a new topology hiding unit assigns a hidden ID to the network element of the own network, and the newly added address hiding unit determines the hidden address of the network element of the own network and replaces the address when the network element of the own network is connected with the network element of the external network. , the routing node is no longer used to achieve topology hiding, so it can solve the problem that the network element identification topology hiding and address hiding cannot be realized because the direct connection is not introduced in the 5G network, and the address and identification cannot be translated during the addressing process. recovery problem.

In the roaming scenario, the business process between the local network element and the external network element is divided into two schemes according to the different initiators: the local network initiates a request message to the external network and the corresponding addressing scheme, and the external network initiates a request message to the local network. Request message and corresponding addressing scheme.

The embodiments of the present invention provide two topology hiding schemes for the two schemes, which will be described separately below.

Scheme 1, the local network initiates a request message and a corresponding addressing scheme to the external network.

Specifically, when the local network initiates a request message to the external network, it can be divided into two cases according to whether the local network element stores the hidden ID of the local network element: the local network element does not store the hidden ID of the local network element. Send a request message to the external network, and the network element of the local network stores the hidden ID of the network element of the local network to send the request message to the external network,

The embodiments of the present invention respectively provide corresponding topology hiding schemes for the above two situations.

1. The network element of the local network does not store the hidden ID of the network element of the local network and sends a request message to the external network.

When the local network element sends a message to its external network element, it needs to query the NRF of the local network whether the destination network element is an external network element, specifically.

The local network element sends a service discovery request to the local network NRF (Network Repository Function, network storage function), and the service discovery request includes signaling such as the service ID, the type of the local network element and the identifier of the destination network element. Wherein, the type of the network element of the local network and the identifier of the destination network element may be a mobile network identification code, a mobile country code, and the like.

The local network NRF determines whether it is a network element in the local network according to the identifier of the destination network element in the service discovery request, and if not, the local network NRF sends the service discovery request to the external network NRF.

After receiving the service discovery request, the external network NRF queries the destination network element according to the signaling in the request message, and sends a service discovery response message including the ID and address of the external network element to the local network NRF.

The local network NRF sends the service discovery response message to the local network element. After receiving the service discovery response, the local network element saves the ID and address of the destination network element in the message and sends it to the topology hiding unit. Topology hiding request message containing its own ID.

Correspondingly, after receiving the topology hiding request from the network element of the own network, the topology hiding unit dynamically assigns a hiding ID to the network element of the own network.

For example, according to the type classification number of the network element on the local network, such as UDM1234.3GPP, an allocation rule is preset. For example, after deleting the topology information such as the city name from the real ID of the network element on the local network, the required hidden ID is formed. When the topology hiding unit receives the topology hiding request from the network element of the local network, it deletes the name of the city on the network element of the local network according to the preset allocation rule, and uses the ID of the name of the city to be deleted as the local city name ID. The hidden ID of the network element of the network is allocated to the network element of the local network.

In the topology hiding list, the hiding ID is placed in a topology hiding response message and sent to the network element of the local network.

Correspondingly, after storing the mapping relationship between the real ID and the hidden ID in the user context, the local network element sends a signaling connection request to the address hiding unit at the transport layer, wherein the signaling connection request includes the local network. The real address of the network element and the address of the external network element.

The address hiding unit replaces the real address in the message with the hidden address of the network element of the local network after receiving the signaling connection request.

The address hiding unit places the hidden address in a signaling connection request message and sends it to the external network element.

Correspondingly, after receiving the signaling connection request, the external network element sends a signaling connection response to the local network element through the address hiding unit according to the hidden address of the local network element in the message, Wherein, the signaling connection response includes the hidden address of the network element of the local network and the address of the network element of the external network.

After receiving the signaling connection response sent by the external network element to the local network element, the address hiding unit replaces the hidden address of the local network element in the message with the real address of the local network element and sends it to the local network element. network element.

Correspondingly, after the local network element receives the signaling connection response, it replaces its own ID with a hidden ID in the application layer service access request, and sends it to the external network element through the address hiding unit.

After receiving the signaling connection response, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network.

After the external network element receives the application layer service access request, according to the hidden address and hidden ID of the local network element in the message, send the application layer service access to the local network element through the address hiding unit. response, and store the hidden ID of the network element of the local network.

Wherein, the signaling connection response includes the hidden address and hidden ID of the network element of the local network and the address and ID of the network element of the external network.

After receiving the application layer service access response, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network, and the network element of the local network and the network element of the local network are sent to the external network element. The external network element establishes service access.

2. The network element of the local network stores the hidden ID of the network element of the local network and sends a request message to the external network.

The network element of the local network has stored its own hidden ID after establishing a connection with the network element of the external network. When sending a request message to the network element of the external network, it is judged whether there is a trust relationship between the network element of the local network and the network element of the external network. Make connection: If a connection has been established between the network element of the local network and the network element of the external network, the network element of the local network sends a request message on the existing signaling connection, so that the network element of the external network can receive After receiving the message, establish service access with the network element of the local network;

If there is no connection between the network element of the local network and the network element of the external network, the network element of the local network queries the address of the network element of the external network from the data stored by itself, and puts the address of the network element of the external network in the information In the connection request, it is sent to the external network element through the address hiding unit.

After receiving the signaling connection request, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network.

After receiving the signaling connection request, the external network element sends a signaling connection response to the local network element through the address hiding unit according to the hidden address of the local network element in the message, wherein the The signaling connection response includes the hidden address of the network element of the local network and the address of the network element of the external network.

After receiving the signaling connection response sent by the external network element to the local network element, the address hiding unit replaces the hidden address of the local network element in the message with the real address of the local network element and sends it to the local network element. network element.

Correspondingly, after the local network element receives the signaling connection response, it replaces its own ID with a hidden ID in the application layer service access request, and sends it to the external network element through the address hiding unit.

After receiving the signaling connection response, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network.

After the external network element receives the application layer service access request, according to the hidden address and hidden ID of the local network element in the message, send the application layer service access to the local network element through the address hiding unit. response, and store the hidden ID of the network element of the local network.

Wherein, the signaling connection response includes the hidden address and hidden ID of the network element of the local network and the address and ID of the network element of the external network.

After receiving the application layer service access response, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network, and the network element of the local network and the network element of the local network are sent to the external network element. The external network element establishes service access.

Scheme 2, the external network initiates a request message and a corresponding addressing scheme to the local network.

Specifically, when the external network initiates a request message to the local network, it can be divided into two cases according to whether the external network element stores the hidden ID and hidden address of the local network element: the external network element does not store the local network element's hidden ID and hidden address. The hidden ID and hidden address send a request message to the local network, and the external network element stores the hidden ID and hidden address of the local network element to send the request message to the local network.

The embodiments of the present invention respectively provide corresponding topology hiding schemes for the above two situations.

1. The external network element does not store the hidden ID and hidden address of the local network element to send a request message to the local network.

When an external network element sends a message to an external network element, it needs to query the NRF of the external network whether the destination network element is a local network element, specifically.

The external network element sends a service discovery request to the external network NRF, and the service discovery request includes signaling such as the service ID, the type of the external network element and the identifier of the destination network element. Wherein, the type of the external network element and the identifier of the destination network element may be a mobile network identification code, a mobile country code, and the like.

The external network NRF determines whether it is a network element in the external network according to the identifier of the destination network element in the service discovery request, and if not, the external network NRF sends the service discovery request to the local network NRF according to the identifier of the destination network element.

After receiving the service discovery request, the local network NRF queries the ID and address of the topology hiding unit of the local network, and sends a service discovery response message containing the ID and address of the topology hiding unit of the local network to the external network NRF.

The external network NRF sends the service discovery response message to the external network element. After receiving the service discovery response, the external network element saves the ID and address of the topology hiding unit in the message, and stores the ID and address of the topology hiding unit according to the topology hiding unit. The ID and address of the application layer service access request including the ID and address of the external network element are sent to the topology hiding unit.

Correspondingly, after receiving the application layer service access request, the topology hiding unit sends a service discovery request including the identifier of the network element of the external network to the NRF of the local network. The local network NRF queries the addresses of network elements in the local network that can support services for the external network elements according to the external network element identifiers, and returns the addresses to the topology hiding unit.

It should be noted that, if the local network NRF queries the local network that there are multiple network elements that can support and serve the external network element, the addresses of the multiple local network elements are returned to the said network element in the form of a list. Topological hidden units. Wherein, any form that can return the addresses of multiple local network elements to the topology hiding unit to realize the function of establishing a connection between the local network and the external network is within the protection scope of the present invention.

Correspondingly, the topology hiding unit assigns a hidden ID to each received network element of the local network, and places the hidden ID in the topology hiding notification message to inform each network element of the local network of the ID after topology hiding.

After receiving the topology hiding notification message, each local network element stores the mapping relationship between the real ID and the hidden ID in the user context.

Correspondingly, the topology hiding unit further sends an address hiding request to the address hiding unit, and the address hiding request message includes the address of the network element of the local network.

Wherein, if there are multiple addresses of local network elements, there will be multiple address hiding units, and the topology hiding unit sends the address hiding request to the address hiding unit interface module, and the address hiding unit interface module belongs to the address hiding unit according to the IP address. The relationship forwards the transfer-hiding request to the corresponding address-hiding unit.

Correspondingly, after receiving the address hiding request, the address hiding unit allocates a hidden connection address for each received network element of the local network, and records the mapping between the real connection address and the hidden connection address in the local mapping table. relationship, and return a hidden address (or a hidden address list) to the topological hidden unit.

The topology hiding unit returns the application layer service access request response including the hidden ID and the hidden address (or the hidden address list) of the local network to the network element of the external network in a redirection manner.

It should be noted that, in the above process, the topology hiding unit assigns a hidden ID to the network element of the network, and the address hiding unit assigns the hidden connection address to the network element of the network. The present invention does not perform the sequence of execution. Restriction, either the topology hiding unit can be executed first to assign a hidden ID to this network element, and then the address hiding unit can be executed to assign a hidden connection address to this network element, or the address hiding unit can be executed first to assign a hidden ID to this network element. After the topological hiding unit is executed, the hidden ID is assigned to the network element of the network.

Correspondingly, after receiving the request response message, the external network element sends a signaling connection request to the address hiding unit at the transport layer, wherein the signaling connection request includes the hidden address of the local network element and the external network element. the address of.

After receiving the signaling connection request, the address hiding unit replaces the hidden address in the message with the real address of the network element of the own network and sends it to the network element of the own network.

After receiving the signaling connection request, the local network element sends a signaling connection response to the external network element through the address hiding unit according to the address of the external network element in the message, wherein the The signaling connection response includes the hidden address of the network element of the local network and the address of the network element of the external network.

Correspondingly, after receiving the signaling connection response, the external network element sends an application layer service access request to the local network element through the address hiding unit according to the hidden ID of the local network element.

After receiving the application layer service access request, the address hiding unit replaces the hidden address of the network element of the local network in the message with the real address of the network element of the cost network and sends it to the network element of the local network.

After receiving the application layer service access request, the local network element sends an application layer service access response to the external network element through the address hiding unit according to the address and ID of the external network element in the message. ,

After receiving the application layer service access response, the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network, and the network element of the external network is connected to the network element of the external network. The local network element establishes service access, and stores the hidden ID and hidden address of the local network element.

2. The external network element stores the hidden ID and hidden address of the local network element and sends a request message to the local network.

If the external network element has established a connection with the local network element before, and has stored the hidden ID and hidden address of the local network element, when sending the request message to the local network element, it can directly send the message to the address hiding unit at the transport layer. A signaling connection request, wherein the signaling connection request includes the hidden address of the network element of the local network and the address of the network element of the external network.

After receiving the signaling connection request, the address hiding unit replaces the hidden address in the message with the real address of the network element of the own network and sends it to the network element of the own network.

After receiving the signaling connection request, the local network element sends a signaling connection response to the external network element through the address hiding unit according to the address of the external network element in the message, wherein the The signaling connection response includes the real address of the network element of the local network and the address of the network element of the external network.

Correspondingly, after receiving the signaling connection response, the external network element sends an application layer service access request to the local network element through the address hiding unit according to the hidden ID of the local network element.

After receiving the application layer service access request, the address hiding unit replaces the hidden address of the network element of the local network in the message with the real address of the network element of the cost network and sends it to the network element of the local network.

After receiving the application layer service access request, the local network element sends an application layer service access response to the external network element through the address hiding unit according to the address and ID of the external network element in the message. ,

After receiving the application layer service access response, the address hiding unit replaces the address in the message with the hidden address of the network element of the local network and sends it to the network element of the external network.

The external network element establishes service access with the local network element.

As shown in FIG. 2 , an embodiment of the present invention provides a topology hiding device, including: a processor 200 and a transceiver 201 .

The processor 200 is configured to determine the hidden ID of the network element of the local network according to the real ID of the network element of the local network after the network element of the local network and the network element of the external network need to be accessed in a direct way; The hidden ID of the network element is sent to the network element of the local network through the transceiver, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network.

Optionally, the processor 200 is further specifically used for:

The determined hidden ID of the local network element is sent to the local network element through the topology hiding response or the topology hiding notification.

Optionally, the processor 200 is further specifically configured to:

Before sending the determined hidden ID of the local network element to the local network element through the topology hidden notification and determining the hidden ID of the local network element, receive the application layer access sent by the external network element including the external network element identifier After the request, send a service discovery request containing the ID of the external network element to the local network storage function NRF; receive a service discovery response request containing the real ID and real address of at least one local network element from the local network NRF ; Send the topology hidden notification including the hidden ID of the network element of the local network to the network element of the local network.

Optionally, the processor 200 is further specifically used for:

After receiving through the transceiver 201 a service discovery response request from the local network NRF containing the real ID and real address of at least one local network element, if the service discovery response request sent by the local network NRF contains multiple The real ID and real address of the network element on the local network, according to the attribution relationship between the network element on the local network and the IP address, send an address hiding request to the address hiding unit corresponding to the network element on the local network.

Optionally, the processor 200 is further specifically configured to:

After receiving the address hiding response sent by the address hiding unit, send the application layer service access response including the hidden ID and the hidden address of the network element of the local network to the external network element.

Optionally, the processor 200 is further specifically configured to:

If the determined hidden ID of the local network element is sent to the local network element by sending the topology hidden response, before the unit determines the hidden ID of the local network element, the transceiver receives the information from the local network element carrying the local network element through the transceiver. The topology hiding request of the real ID; the topology hiding response including the hidden ID of the network element of the local network is sent to the network element of the local network through the transceiver.

As shown in FIG. 3, an embodiment of the present invention provides a topology hiding device including: a processor 300 and a transceiver 301:

The processor 300 is configured to determine the hidden address of the network element of the local network; after receiving the message sent by the network element of the local network to the network element of the external network through the transceiver 301, replace the address in the message with the network element of the local network The hidden address of the network element is sent to the external network element, and after receiving the message sent by the external network element to the local network element through the transceiver 301, the hidden address of the local network element is replaced by the local network element. The real address is sent to the network element of this network.

Optionally, the processor 300 is further specifically used for:

Before the unit determines the hidden address of the network element of the own network, the transceiver 301 receives an address hiding request including the real address of the network element of the own network from the topology hiding unit; A concealment response is sent to the topological concealment unit.

As shown in FIG. 4 , an embodiment of the present invention provides a topology hiding device including: a processor 400 and a transceiver.

The processor 400 is configured to receive, through the transceiver 401, the hidden ID of the network element of the local network sent by the topology hiding unit; establish a connection with the network element of the external network through the address hiding unit; When sending a message, replace the ID in the message with a hidden ID and send it to the address hiding unit, so that the address hiding unit replaces the real address in the message with the hidden address of the network element of the local network and sends it to the external network element.

Optionally, the processor 400 is further specifically configured to:

Before receiving the hidden ID of the network element of the local network sent by the topology hiding unit, when it is necessary to directly access the network element of the external network, a topology hiding request is sent to the topology hiding unit through the transceiver 401 .

Optionally, the message sent to the external network element is an application layer service access request message or an application layer service access response message.

As shown in FIG. 5 , an embodiment of the present invention provides a topology hiding device, including: a processor 500 and a transceiver 501 .

The processor 500 is configured to send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external network NRF when it is necessary to access the network element of the local network in a direct manner; receive the topology hiding unit through the transceiver 501 The application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the hidden unit; Signaling interworking.

Optionally, the processor 500 is also specifically used for:

Before requesting the ID and address of the network element of the local network from the topology hiding unit, a service discovery request is sent to the external network NRF.

Optionally, the processor 500 is also specifically used for:

After receiving the application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the topology hiding unit through the transceiver 501, the hidden ID of the network element of the local network is stored for subsequent signaling interworking use.

As shown in FIG. 6, an embodiment of the present invention provides a topology hiding device, the device includes: at least one processing unit 600 and at least one storage unit 601, wherein the storage unit 601 stores program codes, and when the When the program code is executed by the processing unit 600, the processing unit 600 is caused to execute:

the step of topology hiding by the topology hiding unit; or

The address hiding unit performs a step of topology hiding; or

The step of performing topology hiding by the network element of the local network; or

The step of performing topology hiding by the external network element.

As shown in FIG. 7 , an embodiment of the present invention provides a topology device, including:

The first determining module 700 is configured to determine the hidden ID of the network element of the local network according to the real ID of the network element of the local network after the network element of the local network and the network element of the external network need to be accessed in a direct manner;

The first sending module 701 is used for the unit to send the determined hidden ID of the network element of the local network to the network element of the local network according to the real address, so that the network element of the local network uses the hidden ID to perform signaling with the network element of the external network. Intercommunication.

Optionally, the first determining module 700 is further specifically configured to:

The determined hidden ID of the local network element is sent to the local network element through the topology hiding response or the topology hiding notification.

Optionally, the first sending module 701 is further specifically configured to:

Before sending the determined hidden ID of the local network element to the local network element through the topology hidden notification and determining the hidden ID of the local network element, receive the application layer access sent by the external network element including the external network element identifier After the request, send a service discovery request containing the ID of the external network element to the local network storage function NRF; receive a service discovery response request containing the real ID and real address of at least one local network element from the local network NRF ; Send the topology hidden notification including the hidden ID of the network element of the local network to the network element of the local network.

Optionally, the first determining module 700 is further specifically configured to:

After receiving a service discovery response request including the real ID and real address of at least one local network element from the local network NRF through the transceiver, if the service discovery response request sent by the local network NRF contains multiple local network elements If the real ID and real address of the network element of the network are used, the address hiding request is sent to the address hiding unit corresponding to the network element of the network according to the attribution relationship between the network element of the network element and the IP address of the network element.

Optionally, the first sending module 701 is further specifically configured to:

After receiving the address hiding response sent by the address hiding unit, send the application layer service access response including the hidden ID and the hidden address of the network element of the local network to the external network element.

Optionally, the first sending module 701 is further specifically configured to:

If the determined hidden ID of the local network element is sent to the local network element by sending the topology hidden response, before the unit determines the hidden ID of the local network element, the transceiver receives the information from the local network element carrying the local network element through the transceiver. The topology hiding request of the real ID; the topology hiding response including the hidden ID of the network element of the local network is sent to the network element of the local network through the transceiver.

As shown in FIG. 8 , an embodiment of the present invention provides a topology device, including:

A second determining module 800, configured to determine the hidden address of the network element of the local network;

The second sending module 801 is configured to, after receiving the message sent by the network element of the local network to the network element of the external network, replace the address in the message with the hidden address of the network element of the local network and send it to the external network After receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the real address of the local network element and send it to the local network element.

Optionally, the second sending module 801 is further specifically configured to:

Before the unit determines the hidden address of the network element of the own network, the transceiver receives an address hiding request containing the real address of the network element of the own network from the topology hiding unit; hides the address containing the hidden address of the network element of the own network A response is sent to the topological hidden unit.

As shown in FIG. 9, an embodiment of the present invention provides a topology hiding device, including:

A third determining module 900, configured to receive the hidden ID of the network element of the local network sent by the topology hiding unit; the network element of the local network establishes a connection with the network element of the external network through the address hiding unit;

The third sending module 901 is configured to, when sending a message to an external network element, replace the ID in the message with a hidden ID, and send it to the address hiding unit, so that the address hiding unit will The address is replaced with the hidden address of the network element of the local network and then sent to the network element of the external network.

Optionally, the third sending module 901 is further specifically configured to:

Before receiving the hidden ID of the network element of the local network sent by the topology hiding unit, when it is necessary to access the network element of the external network in a direct way, a topology hiding request is sent to the topology hiding unit through the transceiver.

Optionally, the third determining module 900 is further specifically configured to:

After receiving the hidden ID of the network element of the local network sent by the topology hiding unit through the transceiver, the hidden ID of the network element of the local network is stored for use in subsequent signaling interworking.

Optionally, the message sent to the external network element is an application layer service access request message or an application layer service access response message.

As shown in FIG. 10 , an embodiment of the present invention provides a topology hiding device, including:

The fourth sending module 1000 is configured to send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external network NRF when it is necessary to access the network element of the local network in a direct manner;

The fourth determination module 1001 is configured to receive the application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the topology hidden unit; The address hiding unit performs signaling intercommunication with the network element of the local network.

Optionally, the fourth sending module 1000 is further specifically configured to:

Before requesting the ID and address of the network element of the local network from the topology hiding unit, a service discovery request is sent to the external network NRF.

Optionally, the fourth determining module 1001 is also specifically used for:

After receiving the application layer service access response including the hidden ID and hidden address of the network element of the local network sent by the topology hiding unit through the transceiver, the hidden ID of the network element of the local network is stored for subsequent signaling interworking use.

Based on the same inventive concept, the embodiment of the present invention also provides a method for topology hiding, because the device corresponding to the method is a topology hiding unit in the system for performing topology hiding in the embodiment of the present invention, and the principle of solving the problem is the same as that of the method. The equipment is similar, so the implementation of the method can refer to the implementation of the system topology hidden unit, and the repeated places will not be repeated.

As shown in FIG. 11 , an embodiment of the present invention provides a method for topology hiding, which includes:

Step 1100: After the network element of the local network and the network element of the external network need to be accessed in a direct way, the topology hiding unit determines the hidden ID of the network element of the local network according to the real ID of the network element of the local network;

Step 1101: The topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network according to the real address, so that the network element of the local network uses the hidden ID to perform signaling intercommunication with the network element of the external network. .

Optionally, the topology hiding unit sends the determined hiding ID of the network element of the own network to the network element of the own network through a topology hiding response or a topology hiding notification.

Optionally, if the topology hiding unit sends the determined hidden ID of the network element of the local network to the network element of the local network through the topology hiding notification, before the topology hiding unit determines the hidden ID of the network element of the local network, the topology hiding unit After receiving the application layer access request containing the identity of the external network element sent by the external network element, the hiding unit sends a service discovery request containing the ID of the external network element to the network storage function NRF of the local network; the topology hiding unit Receive a service discovery response request containing the real ID and real address of at least one local network element from the local network NRF; the topology hiding unit sends a topology hiding notification containing the hidden ID of the local network element to the local network. network element.

Optionally, after the topology hiding unit receives a service discovery response request from the local network NRF that includes the real ID and real address of at least one local network element, if the service discovery response request sent by the local network NRF is If the real IDs and real addresses of multiple local network elements are included, the topology hiding unit sends an address hiding request to the address hiding unit corresponding to the local network element according to the attribution relationship between the local network element and the IP address.

Optionally, after receiving the address hiding response sent by the address hiding unit, the topology hiding unit sends an application layer service access response including the hidden ID and hidden address of the network element of the local network to the external network element.

Optionally, if the topology hiding unit sends the determined hidden ID of the local network element to the local network element by sending a topology hiding response, before the topology hiding unit determines the hidden ID of the local network element, the The topology hiding unit receives a topology hiding request from the network element of the local network that carries the real ID of the network element of the local network. The topology hiding unit sends a topology hiding response including the hiding ID of the network element of the own network to the network element of the own network.

Based on the same inventive concept, the embodiment of the present invention also provides a method for topology hiding, because the device corresponding to the method is an address hiding unit in the system for performing topology hiding in the embodiment of the present invention, and the principle of solving the problem is the same as that of the method. The devices are similar, so the implementation of the method can refer to the implementation of the system address hiding unit, and the repeated places will not be repeated.

As shown in FIG. 12 , an embodiment of the present invention further provides a method for topology hiding, which includes:

Step 1200, the address hiding unit determines the hidden address of the network element of this network;

Step 1201: After receiving the message sent by the network element of the local network to the network element of the external network, the address hiding unit replaces the address in the message with the hidden address of the network element of the local network and sends it to the external network. After receiving the message sent by the external network element to the local network element, replace the hidden address of the local network element with the address of the local network element and send it to the local network element.

Optionally, before the address hiding unit determines the hidden address of the network element of the local network, it further includes:

The address hiding unit receives an address hiding request including the real address of the network element of the local network from the topology hiding unit; the address hiding unit sends the determined hidden address of the network element of the local network to the topology hiding unit, including : The address hiding unit sends an address hiding response including the hiding address of the network element of the local network to the topology hiding unit.

Based on the same inventive concept, an embodiment of the present invention also provides a method for topology hiding, since the device corresponding to the method is a local network element in the system for performing topology hiding in the embodiment of the present invention, and the principle of the method for solving the problem Similar to the device, the implementation of the method may refer to the implementation of the network element of the system in the local network, and the repetition will not be repeated.

As shown in FIG. 13 , an embodiment of the present invention provides a method for topology hiding, which includes:

Step 1300, the network element of the local network receives the hidden ID of the network element of the local network sent by the topology hiding unit;

Step 1301, the network element of the local network establishes a connection with the network element of the external network through the address hiding unit;

In step 1302, when the local network element sends a message to an external network element, it replaces the ID in the message with a hidden ID, and sends it to the address hiding unit, so that the address hiding unit hides the real information in the message. The address is replaced with the hidden address of the network element of the local network and then sent to the network element of the external network.

Optionally, before the local network element receives the hidden ID of the local network element sent by the topology hiding unit, the method further includes:

When the network element of the local network needs to access the network element of the external network in a direct way, it sends a topology hiding request to the topology hiding unit.

Optionally, after the local network element receives the hidden ID of the local network element sent by the topology hiding unit, the method further includes:

The local network element stores the hidden ID of the local network element for use in subsequent signaling interworking.

Optionally, the message sent by the network element of the local network element to the network element of the external network is an application layer service access request message or an application layer service access response message.

Based on the same inventive concept, the embodiment of the present invention also provides a method for topology hiding, because the device corresponding to the method is an external network element in the system for performing topology hiding in the embodiment of the present invention, and the principle of the method for solving the problem Similar to the device, the implementation of the method can refer to the implementation of the network element of the external network of the system, and the repetition will not be repeated.

As shown in FIG. 14 , an embodiment of the present invention further provides a method for topology hiding, which includes:

Step 1400: When the network element of the external network needs to access the network element of the local network in a direct way, send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the NRF of the external network;

Step 1401, the external network element receives the application layer service access response including the hidden ID and the hidden address of the local network element and sent by the topology hiding unit;

Step 1402: The external network element performs signaling intercommunication with the local network element through the address hiding unit according to the hidden ID and hidden address of the local network element.

Optionally, before the external network element requests the ID and address of the local network element from the topology hiding unit, the method further includes:

The external network element sends a service discovery request to the external network NRF.

Optionally, after the external network element receives the application layer service access response including the hidden ID and the hidden address of the local network element and sent by the topology hiding unit, the method further includes:

The external network element stores the hidden ID of the local network element for use in subsequent signaling interworking.

The embodiment of the present invention provides four complete methods for topology hiding.

(1) When the network element of the local network does not store its own hidden ID, a request message and a corresponding addressing scheme are sent to the external network.

As shown in FIG. 15 , the first topology hiding method according to the embodiment of the present invention includes:

Step 1500, the local network element sends a service discovery request to the external network NRF through the local network NRF;

Step 1501, the external network NRF sends a service discovery response to the local network element through the local network NRF;

Step 1502, the network element of the local network sends a topology hiding request to the topology hiding unit;

Step 1503, the topology hiding unit determines the hidden ID of the network element of the local network, and places it in the topology hiding response and sends it to the network element of the local network;

Step 1504, the local network element stores the topology hiding mapping relationship, and sends a signaling connection request to the address hiding unit;

Step 1505, the address hiding unit replaces the address in the signaling connection request with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1506, the external network element sends a signaling connection response to the address hiding unit;

Step 1507, the address hiding unit replaces the address in the signaling connection response with the real address of the local network element and sends it to the local network element;

Step 1508, the local network element sends an application layer service access request to the address hiding unit;

Step 1509, the address hiding unit replaces the address in the application layer service access request with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1510, the external network element sends an application layer service access response to the address hiding unit;

Step 1511: The address hiding unit replaces the address in the application layer service access response with the hidden address of the network element of the own network and sends it to the network element of the own network.

(2) When the network element of the local network stores its own hidden ID, it initiates a request message and a corresponding addressing scheme to the external network.

As shown in FIG. 16 , the second topology hiding method according to the embodiment of the present invention includes:

Step 1600, the network element of the local network queries the address of the network element of the external network from the data stored at the local end;

Step 1601, the local network element address sends a signaling connection request to the hidden unit;

Step 1602, the address hiding unit replaces the address in the signaling connection request with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1603, the external network element sends a signaling connection response to the address hiding unit;

Step 1604, the address hiding unit replaces the address in the signaling connection response with the hidden address of the network element of the own network and sends it to the network element of the own network;

Step 1605, the local network element sends an application layer service access request to the address hiding unit;

Step 1606, the address hiding unit replaces the address in the application layer service access request with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1607, the external network element sends an application layer service access response to the address hiding unit;

Step 1608, the address hiding unit replaces the address in the application layer service access response with the hidden address of the network element of the local network and sends it to the network element of the local network;

(3) When the external network element does not store the hidden ID of the local network element, a request message and a corresponding addressing scheme are sent to the local network element.

As shown in FIG. 17 , the third topology hiding method according to the embodiment of the present invention includes:

Step 1700, the external network element sends a service discovery request to the local network NRF through the external network NRF;

Step 1701, the local network NRF sends a service discovery response to the external network element through the external network NRF;

Step 1702, the external network element sends a signaling connection request and an application layer service access request to the topology hiding unit;

Step 1703, the topology hiding unit sends a service discovery request to the local network NRF;

Step 1704, the local network NRF returns a service discovery response including the local network element address to the topology unit;

Step 1705, the topology hiding unit determines the hidden ID of the network element of the local network, and places it in the topology hiding notification and sends it to the network element of the local network;

Step 1706, the network element of the local network sends a topology hiding response to the topology hiding unit;

Step 1707, the topology hiding unit sends an address hiding request to the address hiding unit;

Step 1708, the address hiding unit determines the hidden address of the network element of this network, and places it in the address hiding response and sends it to the topology hiding unit;

Step 1709, the address hiding unit sends an application layer service access response to the external network element in a redirection manner;

Step 1710, the external network element sends a signaling connection request to the address hiding unit;

Step 1711, the address hiding unit replaces the address in the signaling connection request with the hidden address of the network element of the own network and sends it to the network element of the own network;

Step 1712, the local network element sends a signaling connection response to the address hiding unit;

Step 1713, the address hiding unit replaces the address in the signaling connection response with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1714, the external network element sends an application layer service access request to the address hiding unit;

Step 1715, the address hiding unit replaces the address in the application layer service access request with the hidden address of the network element of the own network and sends it to the network element of the own network;

Step 1716, the local network element sends an application layer service access response to the address hiding unit;

Step 1717: The address hiding unit replaces the address in the application layer service access response with the hidden address of the network element of the own network and sends it to the network element of the own network.

(4) When the external network element stores the hidden ID of the local network element, it initiates a request message and a corresponding addressing scheme to the local network element.

As shown in FIG. 18 , a fourth topology hiding method according to an embodiment of the present invention includes:

Step 1800, the external network element sends a signaling connection request to the address hiding unit according to the stored hidden ID and hidden address of the local network element;

Step 1801, the address hiding unit replaces the address in the signaling connection request with the hidden address of the network element of the own network and sends it to the network element of the own network;

Step 1802, the local network element sends a signaling connection response to the address hiding unit;

Step 1803, the address hiding unit replaces the address in the signaling connection response with the hidden address of the network element of the local network and sends it to the network element of the external network;

Step 1804, the external network element sends an application layer service access request to the address hiding unit;

Step 1805, the address hiding unit replaces the address in the application layer service access request with the hidden address of the network element of the own network and sends it to the network element of the own network;

Step 1806, the local network element sends an application layer service access response to the address hiding unit;

Step 1807: The address hiding unit replaces the address in the application layer service access response with the hidden address of the network element of the own network and sends it to the network element of the own network.

The embodiments of the present invention further provide a computing device-readable storage medium for the method for topology hiding of the topology hiding unit, that is, the content will not be lost after the power is turned off. The storage medium stores software programs, including program codes. When the program codes are run on a computing device, the software programs can implement any of the above embodiments of the present invention when read and executed by one or more processors. Scheme of a method for topological hiding by topological hiding units.

The embodiments of the present invention further provide a computing device-readable storage medium for the method for performing topology hiding of the address hiding unit, that is, the content is not lost after the power is turned off. The storage medium stores software programs, including program codes. When the program codes are run on a computing device, the software programs can implement any of the above embodiments of the present invention when read and executed by one or more processors. Topological hiding unit is a scheme for topological hiding.

The embodiments of the present invention further provide a storage medium readable by a computing device for the method for topology hiding of the network element of the local network, that is, the content is not lost after the power is turned off. The storage medium stores software programs, including program codes. When the program codes are run on a computing device, the software programs can implement any of the above embodiments of the present invention when read and executed by one or more processors. A scheme of a method for topology hiding by network elements of this network.

Embodiments of the present invention further provide a storage medium readable by a computing device for the method for performing topology hiding on an external network element unit, that is, the content is not lost after a power failure. The storage medium stores software programs, including program codes. When the program codes are run on a computing device, the software programs can implement any of the above embodiments of the present invention when read and executed by one or more processors. A scheme of a method for topology hiding of external network elements.

The present application is described above with reference to block diagrams and/or flowchart illustrations illustrating methods, apparatus (systems) and/or computer program products according to embodiments of the present application. It will be understood that a block of the block diagrams and/or flowchart illustrations, and combinations of blocks of the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer and/or other programmable data processing apparatus to produce a machine such that the instructions executed via the computer processor and/or other programmable data processing apparatus create a Methods of implementing the functions/acts specified in the block diagrams and/or flowchart blocks.

Accordingly, the present application may also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by an instruction execution system or Used in conjunction with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by, or in connection with, an instruction execution system, apparatus, or device. device or equipment use.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (35)

1. A method of topology hiding, the method comprising:

the topology hiding unit determines the hidden ID of the local network element according to the real ID of the local network element after the local network element and the external network element need to be accessed in a direct mode;

and the topology hiding unit sends the determined hidden ID of the local network element to the local network element according to the real address, so that the local network element adopts the hidden ID to perform signaling intercommunication with the external network element.

2. The method as claimed in claim 1, wherein the topology hiding unit sends the determined hidden ID of the home network element to the home network element according to the real address, comprising:

and the topology hiding unit sends the determined hidden ID of the local network element to the local network element through a topology hiding response or a topology hiding notification.

3. The method of claim 2, wherein if the topology hiding unit sends the determined hidden ID of the local network element to the local network element through a topology hiding notification, before the topology hiding unit determines the hidden ID of the local network element, the method further comprises:

the topology hiding unit sends a service discovery request containing an external network element ID to a local network storage function NRF after receiving an application layer access request containing the external network element ID sent by an external network element;

the topology hiding unit receives a service discovery response request containing a real ID and a real address of at least one local network element from the local network NRF;

the topology hiding unit sends the determined hidden ID of the local network element to the local network element by sending a topology hiding notification, and the topology hiding unit comprises:

and the topology hiding unit sends a topology hiding notification containing the hiding ID of the local network element to the local network element.

4. A method as claimed in claim 3, wherein, after said topology hiding unit receives a service discovery response request from said home NRF containing a real ID and a real address of at least one home network element, further comprising:

and if the service discovery response request sent by the NRF of the local network comprises the real IDs and the real addresses of a plurality of network elements of the local network, the topology hiding unit sends an address hiding request to an address hiding unit corresponding to the network element of the local network according to the attribution relationship between the network element of the local network and the IP address.

5. The method as claimed in claim 3, wherein after the topology hiding unit sends the topology hiding notification including the hidden ID of the local network element to the local network element, the method further comprises:

and after receiving the address hiding response sent by the address hiding unit, the topology hiding unit sends an application layer service access response containing the hidden ID and the hidden address of the local network element to the external network element.

6. The method as claimed in claim 2, wherein if the topology hiding unit sends the determined hidden ID of the local network element to the local network element by sending a topology hiding response, before the topology hiding unit determines the hidden ID of the local network element, the method further comprises:

the topology hiding unit receives a topology hiding request carrying a real ID of a local network element from the local network element;

the topology hiding unit sends the determined hidden ID of the local network element to the local network element through the topology hiding response, and the topology hiding unit comprises:

and the topology hiding unit sends a topology hiding response containing the hidden ID of the network element of the local network to the network element of the local network.

7. A method of topology hiding, the method comprising:

the address hiding unit determines a hidden address of a network element of the local network;

after receiving a message sent to an external network element when a local network element needs to access the external network element in a direct mode, the address hiding unit replaces an address in the message with a hidden address of the local network element and sends the hidden address to the external network element, and

after receiving a message sent to a local network element when an external network element needs to access the local network element in a direct mode, replacing a hidden address of the local network element with a real address of the local network element and sending the hidden address to the local network element;

and the message sent by the network element of the local network to the network element of the external network comprises the hidden ID of the network element of the local network.

8. The method of claim 7, wherein before said address hiding unit determines the hidden address of the home network element, further comprising:

the address hiding unit receives an address hiding request containing a real address of a local network element from the topology hiding unit;

the address hiding unit sends the determined hidden address of the network element of the local network to the topology hiding unit, and the method includes:

and the address hiding unit sends an address hiding response containing the hidden address of the network element of the local network to the topology hiding unit.

9. A method of topology hiding, the method comprising:

the local network element receives the hidden ID of the local network element sent by the topology hiding unit; the local network element establishes connection with the external network element through an address hiding unit;

when the local network element needs to access the external network element in a direct mode and sends a message to the external network element, the real ID in the message is replaced by the hidden ID and sent to the address hiding unit, so that the address hiding unit replaces the real address in the message by the hidden address of the local network element and then sends the hidden address of the local network element to the external network element.

10. The method as claimed in claim 9, wherein before said home network element receives the hidden ID of said home network element sent by the topology hiding unit, further comprising:

and when the local network element needs to access the external network element in a direct mode, the local network element sends a topology hiding request to the topology hiding unit.

11. The method as claimed in claim 9, wherein after said home network element receives said hidden ID of said home network element sent by said topology hiding unit, further comprising:

and the local network element stores the hidden ID of the local network element for subsequent signaling intercommunication.

12. The method of claim 9, wherein the message sent by the home network element to the foreign network element is an application layer service access request message or an application layer service access response message.

13. A method of topology hiding, the method comprising:

when the external network element needs to access the local network element in a direct mode, sending an application layer service access request to a topology hiding unit according to the address of the topology hiding unit returned by the external network NRF;

the external network element receives an application layer service access response which is sent by the topology hiding unit and contains the hidden ID and the hidden address of the local network element;

and the external network element performs signaling intercommunication with the local network element through an address hiding unit according to the hidden ID and the hidden address of the local network element.

14. The method of claim 13, wherein before the external network element requests the topology hiding unit for the ID and address of the local network element, the method further comprises:

and the external network element sends a service discovery request to the external network NRF.

15. The method as claimed in claim 14, wherein after the external network element receives the application layer service access response containing the hidden ID and the hidden address of the local network element sent by the topology hiding unit, the method further comprises:

and the external network element stores the hidden ID of the local network element for subsequent signaling intercommunication.

16. A topology hiding device, comprising: a processor and a transceiver:

the processor is used for determining the hidden ID of the local network element according to the real ID of the local network element after the local network element and the external network element need to be accessed in a direct mode; and sending the determined hidden ID of the local network element to the local network element through a transceiver according to the real address so that the local network element adopts the hidden ID to carry out signaling intercommunication with the external network element.

17. The device as in claim 16, wherein the processor is further specifically configured to:

and sending the determined hidden ID of the local network element to the local network element through a topology hiding response or a topology hiding notification.

18. The device as in claim 17, wherein the processor is further specifically configured to:

before sending the determined hidden ID of the local network element to the local network element and determining the hidden ID of the local network element through the topology hiding notification, after receiving an application layer access request containing an external network element ID sent by an external network element, sending a service discovery request containing the external network element ID to a local network storage function NRF; receiving a service discovery response request containing a real ID and a real address of at least one local network element from the local network NRF; and sending the topology hiding notification containing the hidden ID of the local network element to the local network element.

19. The device as in claim 18, wherein the processor is further specifically configured to:

after receiving a service discovery response request containing a real ID and a real address of at least one home network element from the home NRF through the transceiver, if the service discovery response request sent by the home NRF contains real IDs and real addresses of a plurality of home network elements, sending an address hiding request to an address hiding unit corresponding to the home network element according to an affiliation between the home network element and an IP address.

20. The device as in claim 18, wherein the processor is further specifically configured to:

and after receiving the address hiding response sent by the address hiding unit, sending an application layer service access response containing the hidden ID and the hidden address of the local network element to the external network element.

21. The device as in claim 17, wherein the processor is further specifically configured to:

if the determined hidden ID of the local network element is sent to the local network element by sending a topology hiding response, before the unit determines the hidden ID of the local network element, a topology hiding request carrying the real ID of the local network element from the local network element is received by a transceiver; and sending the topology hiding response containing the hiding ID of the local network element to the local network element through a transceiver.

22. A topology hiding device, comprising: a processor and a transceiver:

the processor is used for determining the hidden address of the network element of the local network; after receiving a message sent to an external network element when a local network element needs to access the external network element in a direct mode through a transceiver, replacing an address in the message with a hidden address of the local network element and sending the hidden address to the external network element; after receiving the message sent to the local network element when the external network element needs to access the local network element in a direct mode through the transceiver, replacing the hidden address of the local network element with the real address of the local network element and sending the hidden address of the local network element to the local network element;

and the message sent by the network element of the local network to the network element of the external network comprises the hidden ID of the network element of the local network.

23. The device as in claim 22, wherein the processor is further specifically configured to:

before the unit determines the hidden address of the local network element, an address hiding request containing the real address of the local network element from the topology hiding unit is received through a transceiver; and sending an address hiding response containing the hidden address of the local network element to the topology hiding unit.

24. A topology hiding device, comprising: a processor and a transceiver:

the processor is used for receiving the hidden ID of the network element of the local network sent by the topology hiding unit through the transceiver; establishing connection with an external network element through an address hiding unit; and when the local network element needs to access the external network element in a direct mode and sends a message to the external network element, replacing the real ID in the message with a hidden ID, and sending the hidden ID to an address hiding unit, so that the address hiding unit replaces the real address in the message with the hidden address of the local network element and then sends the hidden address to the external network element.

25. The device as in claim 24, wherein the processor is further specifically configured to:

and before receiving the hidden ID of the local network element sent by the topology hiding unit, sending a topology hiding request to the topology hiding unit through a transceiver when the external network element needs to be accessed in a direct mode.

26. The device as in claim 24, wherein the processor is further specifically configured to:

and after receiving the hidden ID of the local network element sent by the topology hiding unit through the transceiver, storing the hidden ID of the local network element for subsequent signaling intercommunication.

27. The apparatus in claim 24, wherein the message sent to the extranet network element is an application layer service access request message or an application layer service access response message.

28. A topology hiding device, comprising: a processor and a transceiver:

the processor is used for sending an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external network NRF when the local network element needs to be accessed in a direct mode; receiving an application layer service access response which is sent by the topology hiding unit and contains the hidden ID and the hidden address of the network element of the local network through a transceiver; and according to the hidden ID and the hidden address of the local network element, carrying out signaling intercommunication with the local network element through an address hiding unit.

29. The device as in claim 28, wherein the processor is further specifically configured to:

before requesting the topology hiding unit for the ID and address of the network element of the home network, a service discovery request is sent to the foreign network NRF.

30. The device as in claim 29, wherein the processor is further specifically configured to:

and after receiving an application layer service access response containing the hidden ID and the hidden address of the local network element sent by the topology hiding unit through the transceiver, storing the hidden ID of the local network element for subsequent signaling intercommunication.

31. A topology hiding device, comprising:

the first determining module is used for determining the hidden ID of the local network element according to the real ID of the local network element after the local network element and the external network element need to be accessed in a direct mode;

and the first sending module is used for sending the determined hidden ID of the local network element to the local network element according to the real address so that the local network element adopts the hidden ID to carry out signaling intercommunication with the external network element.

32. A topology hiding device, comprising:

the second determining module is used for determining the hidden address of the network element of the local network;

the second sending module is used for replacing an address in a message with a hidden address of the local network element and sending the message to the external network element after the message sent to the external network element when the local network element needs to access the external network element in a direct mode is received; after receiving the message sent to the local network element when the external network element needs to access the local network element in a direct mode, replacing the hidden address of the local network element with the real address of the local network element and sending the hidden address of the local network element to the local network element;

and the message sent by the network element of the local network to the network element of the external network comprises the hidden ID of the network element of the local network.

33. A topology hiding device, comprising:

a third determining module, configured to receive a hidden ID of a local network element sent by the topology hiding unit; the local network element is connected with the external network element through an address hiding unit;

and a third sending module, configured to, when the local network element needs to access an external network element in a direct manner, and send a message to the external network element, replace the ID in the message with a hidden ID, and send the hidden ID to an address hiding unit, so that the address hiding unit replaces the real address in the message with the hidden address of the local network element and sends the hidden address to the external network element.

34. A topology hiding device, comprising:

a fourth sending module, configured to send an application layer service access request to the topology hiding unit according to the address of the topology hiding unit returned by the external NRF when a direct manner is required to access a network element of the home network;

a fourth determining module, configured to receive an application layer service access response that is sent by the topology hiding unit and includes a hidden ID and a hidden address of a home network element; and according to the hidden ID and the hidden address of the local network element, carrying out signaling intercommunication with the local network element through an address hiding unit.

35. A topology hiding device, comprising: at least one processing unit, and at least one storage unit, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform:

the steps of the process of any one of claims 1 to 6; or

The steps of the method of claim 7 or 8; or

The steps of the process of any one of claims 9 to 12; or the steps of the process of any one of claims 13 to 15.

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