Communication method, apparatus, and system

A communication apparatus, comprising:

• a processing module, configured to obtain a second key used for communication authentication with a second node, wherein the second key is different from a preconfigured first key;
• and
• a communication module, configured to receive, from the second node, a release request for a first communication connection, wherein the first key is used for communication authentication on the first communication connection, wherein
• the communication module is further configured to send a connection establishment request to the second node, wherein the connection establishment request is used to request to establish a connection based on the second key.

A chip, wherein the chip is coupled to a memory, and is configured to implement a communication method, wherein the method comprises:

• obtaining a second key used for communication authentication with a second node, wherein the second key is different from a preconfigured first key;
• receiving, from the second node, a release request for a first communication connection, wherein the first key is used for communication authentication on the first communication connection;
• and
• sending a connection establishment request to the second node, wherein the connection establishment request is used to request to establish a connection based on the second key.