Abstract: This application discloses an access control list (ACL) configuration method and apparatus. A first base station may include a user plane Internet Protocol (IP) address of the first base station in signaling such as a handover request message, a configuration update message, or a secondary station addition request message, so that a target base station can obtain the user plane IP address of the first base station without performing a transport network layer (TNL) address discovery procedure. Then, an ACL can be configured based on the obtained IP address. Therefore, a case in which a packet sent by the first base station is discarded by a second base station in a base station handover scenario can be effectively avoided, and data transmission reliability can be improved.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: A source secondary node SN receives an address of a core network device from a source master node MN. The source SN establishes, based on the address of the core network device, a channel for data forwarding between the source SN and the core network device, where the channel for data forwarding is used for transmission of data of a terminal device.

Abstract: This application discloses an access control list (ACL) configuration method and apparatus. A first base station may include a user plane Internet Protocol (IP) address of the first base station in signaling such as a handover request message, a configuration update message, or a secondary station addition request message, so that a target base station can obtain the user plane IP address of the first base station without performing a transport network layer (TNL) address discovery procedure. Then, an ACL can be configured based on the obtained IP address. Therefore, a case in which a packet sent by the first base station is discarded by a second base station in a base station handover scenario can be effectively avoided, and data transmission reliability can be improved.