Communication method, communications device, and communications system

1. A communication method implemented for a centralized unit, comprising:

determining whether a paging of a paged terminal device is originated from a core network node or from a radio access network node, wherein the radio access network node is a base station;

setting indication information based on the determining whether the paging of the paged terminal device is originated from the core network node or from the radio access network node, wherein the indication information is set to be identity information that is originated from the core network node when the paging is originated from the core network node, or the indication information is set to be identity information that is generated by the radio access network node when the paging is originated from the radio access network node;

in response to at least determining that the paging is originated from the radio access network node, sending, by the centralized unit to a distributed unit over an F1 interface, a paging message, wherein the paging message carries the indication information that indicates that the paging is originated from the radio access network node, and wherein the indication information is set to identity information that is generated by the radio access network node, and wherein the centralized unit and the distributed unit are included in the base station.

2. The communication method according to claim 1 , wherein the indication information is sent by the distributed unit to the paged terminal device.

3. An apparatus, comprising:

at least one processor, and a non-transitory memory storing instructions for execution by the at least one processor;

wherein, when executed, the instructions cause the apparatus to perform operations comprising:

determining whether a paging of a paged terminal device is originated from a core network node or from a radio access network node, wherein the radio access network node is a base station;

setting indication information based on the determining whether the paging of the paged terminal device is originated from the core network node or from the radio access network node, wherein the indication information is set to be identity information that is originated from the core network node when the paging is originated from the core network node, or the indication information is set to be identity information that is generated by the radio access network node when the paging is originated from the radio access network node;

in response to at least determining that the paging is originated from the radio access network node, sending, by a centralized unit to a distributed unit over an F1 interface, a paging message, wherein the paging message carries the indication information that indicates that the paging is originated from the radio access network node, and wherein the indication information is set to identity information that is generated by the radio access network node, and wherein the centralized unit and the distributed unit are included in the base station.

4. The apparatus according to claim 3 , wherein the indication information is sent by the distributed unit to the paged terminal device.

5. A communication system, comprising:

a centralized unit and a distributed unit, wherein the centralized unit and the distributed unit are included in a base station, and wherein:

the centralized unit is configured to:

determine whether a paging of a paged terminal device is originated from a core network node or from a radio access network node, wherein the radio access network node is the base station;

set indication information based on the determination, wherein the indication information is set to be identity information that is originated from the core network node when the paging is originated from the core network node, or the indication information is set to be identity information that is generated by the radio access network node when the paging is originated from the radio access network node;

in response to at least determining that the paging is originated from the radio access network node, send, to the distributed unit over an F1 interface, a paging message, wherein the paging message carries the indication information that indicates that the paging is originated from the radio access network node;

the distributed unit is configured to:

determine, according to the indication information, that the paging is originated from the radio access network node, and the indication information is set to identity information that is generated by the radio access network node; and

send the indication information to the paged terminal device.

6. The communication system according to claim 5 , wherein the indication information comprises an identity of the paged terminal device configured by the radio access network node.

7. The communication method according to claim 1 , wherein the centralized unit comprises at least one of the following: a Radio Resource Control layer, a Service Data Adaptation Protocol layer, or a Packet Data Convergence Protocol layer; and

the distributed unit comprises at least one of the following: a Radio Link Control layer, a Media Access Control layer, or a physical layer.

8. The communication method according to claim 1 , wherein the setting indication information comprises:

setting the indication information based on two information elements, one information element of the two information elements is used to carry the identity information of the paged terminal device that is originated from the core network node, and the other information element of the two information elements is used to carry the identity information of the paged terminal device configured by the radio access network node.