Communication method, apparatus, and system

1 . A communication apparatus operating as part of a first node, comprising:

at least one processor; and

one or more memories coupled to the at least one processor and storing instructions, which when executed by the at least one processor, cause the at least one processor to perform operations, the operations comprising:

obtaining first information; and

establishing a first communication connection to a second node based on the first information, wherein the first communication connection is used to transmit data of a first service, and the first communication connection is corresponding to a first communication technology,

wherein the first node is a node that accesses a network corresponding to a second communication technology, and the first service is a service of the first communication technology or a service of the second communication technology.

2 . The communication apparatus according to claim 1 , wherein the first information comprises a first key used for communication authentication with the second node, and the obtaining first information comprises:

obtaining the first key based on a type corresponding to the second communication technology and/or a service type of the first service.

3 . The communication apparatus according to claim 1 , wherein the first information comprises a first key used for communication authentication with the second node, and the operations further comprise:

receiving a first message from the second node, wherein the first message carries key type indication information or service type indication information; and

obtaining the first key based on the key type indication information or the service type indication information.

4 . The communication apparatus according to claim 2 , wherein the establishing a first communication connection to a second node based on the first information comprises:

sending a second message associated with the first key to the second node, wherein the second message is used for identity authentication of the first node;

receiving a third message that is in response to the second message, wherein the third message is used for identity authentication of the second node; and

sending a fourth message to the second node when identity authentication of the second node succeeds, wherein the fourth message is used to establish the first communication connection to the second node.

5 . The communication apparatus according to claim 2 , wherein

when the first service is a service of the first communication technology, the first key is used for a service of the first communication technology; or

when the first service is a service of the second communication technology, the first key is used for a service of the second communication technology.

6 . The communication apparatus according to claim 5 , wherein a key used for a service of the second communication technology comprises a trusted key that is successfully authenticated through the network or an untrusted key that is not authenticated through the network, wherein a priority of the trusted key is higher than that of the untrusted key.

7 . The communication apparatus according to claim 1 , wherein before establishing the first communication connection, the operations further comprise:

receiving a key from the network to be used for a service of the second communication technology.

8 . The communication apparatus according to claim 1 , wherein the first information comprises a first security context used for communication with the second node, and the obtaining first information comprises:

receiving a fifth message from the second node, wherein the fifth message carries an identifier associated with the first security context; and

obtaining the first security context based on the identifier.

9 . The communication apparatus according to claim 8 , wherein

when the first service is a service of the first communication technology, the first security context is used for a service of the first communication technology; or

when the first service is a service of the second communication technology, the first security context is used for a service of the second communication technology.

10 . The communication apparatus according to claim 9 , wherein a security context used for a service of the second communication technology comprises a trusted security context that is successfully authenticated through the network or an untrusted security context that is not authenticated through the network, wherein a priority of the trusted security context is higher than that of the untrusted security context.

11 . The communication apparatus according to claim 1 , wherein before obtaining the first information, the operations further comprise:

sending a sixth message to the second node, wherein the sixth message carries information used to indicate that the first node supports the second communication technology.

12 . A communication apparatus operating as part of a second node, comprising:

at least one processor; and

one or more memories coupled to the at least one processor and storing instructions, which when executed by the at least one processor, cause the at least one processor to perform operations, the operations comprising:

obtaining first information; and

establishing a first communication connection to a first node based on the first information, wherein the first communication connection is used to transmit data of a first service, and the first communication connection is corresponding to a first communication technology,

wherein the first node is a node that accesses a network corresponding to a second communication technology, and the first service is a service of the first communication technology or a service of the second communication technology.

13 . The communication apparatus according to claim 12 , wherein the first information comprises a first key used for communication authentication with the first node, and the obtaining first information comprises:

obtaining the first key based on a type corresponding to the second communication technology and/or a service type of the first service.

14 . The communication apparatus according to claim 13 , wherein the operations further comprise:

sending a first message to the first node, wherein the first message carries information associated with the first key.

15 . The communication apparatus according to claim 13 , wherein the establishing a first communication connection to the first node based on the first information comprises:

receiving a second message from the first node, wherein the second message is associated with the first key, and the second message is used for identity authentication of the first node;

when identity authentication of the first node succeeds, sending a third message to the first node, wherein the third message is used for identity authentication of the second node; and

receiving a fourth message that is in response to the third message, wherein the fourth message is used to establish the first communication connection to the second node.

16 . The communication apparatus according to claim 13 , wherein

when the first service is a service of the first communication technology, the first key is used for a service of the first communication technology; or

when the first service is a service of the second communication technology, the first key is used for a service of the second communication technology.

17 . The communication apparatus according to claim 16 , wherein a key used for a service of the second communication technology comprises a trusted key that is successfully authenticated through the network or an untrusted key that is not authenticated through the network, wherein a priority of the trusted key is higher than that of the untrusted key.

18 . The communication apparatus according to claim 12 , wherein before establishing the first communication connection, the operations further comprise:

receiving a key from the network to be used for a service of the second communication technology.

19 . The communication apparatus according to claim 12 , wherein the first information comprises a first security context, the first security context is used by the second node to establish the first communication connection to the first node, and the obtaining first information comprises:

obtaining the first security context based on a type corresponding to the second communication technology and/or a service type of the first service.

20 . A method performed at a first node, comprising:

obtaining first information; and

establishing a first communication connection to a second node based on the first information, wherein the first communication connection is used to transmit data of a first service, and the first communication connection is corresponding to a first communication technology,

wherein the first node is a node that accesses a network corresponding to a second communication technology, and the first service is a service of the first communication technology or a service of the second communication technology.