Method and apparatus for reducing interruption delay, and user device

An apparatus for shortening an interruption delay, applicable to a mobile communication network, the apparatus comprising at least a processor and a transceiver, wherein:

• the processor is configured to trigger an anchor changing operation at a source network side in the mobile communication network, wherein the anchor changing operation is an operation triggered by a source primary network entity selecting one of at least one source secondary network entity of the source network side as a target primary network entity based upon a radio resource management strategy of a multi-connectivity user equipment, and the source primary network entity is a source anchor of the multi-connectivity user equipment;
• in response to the anchor changing operation, to initiate an anchor changing request to the target primary network entity;
• to receive the anchor changing request, and to configure and obtain target network side configuration parameters of the target network side in the mobile communication network based upon the anchor changing request;
• to receive the target network side configuration parameters, and to generate a radio resource control message of the target network side based upon the target network side configuration parameters;
• to enter a target network side configuration effective state upon reception of an anchor reconstruction instructing message generated and transmitted by the multi-connectivity user equipment based upon the radio resource control message;
• and
• to reconstruct the target network side based upon the anchor reconstruction instructing message and the target network side configuration parameters, so that the target primary network entity becomes a target anchor of the multi-connectivity user equipment, and the source primary network entity becomes one of target secondary network entities of the target network side;
• the transceiver is configured to transmit and receive data under the control of the processor.

A user equipment, applicable to a mobile communication network, wherein the user equipment comprises at least a processor and a transceiver;

• wherein:
• the processor is configured to receive a radio resource control message of a target network side transmitted by a source primary network entity of a source network side in the mobile communication network with which the user equipment remains connected, wherein the radio resource control message of the target network side is configured and obtained by a target primary network entity based upon an anchor changing request transmitted by the source primary network entity;
• and
• to generate an anchor reconstruction instructing message based upon the radio resource control message, and to transmit the anchor reconstruction instructing message to the target primary network entity at the target network side in the mobile communication network, so that the target primary network entity enters a target network side configuration effective state, and reconstructs the target network side, upon reception of the anchor reconstruction instructing message;
• wherein the user equipment is capable of being connected concurrently with more than two network entities in the mobile communication network, and the source primary network entity is a source anchor of the multi-connectivity user equipment, the target primary network entity is selected by the source primary network entity from at least one source secondary network entity at the source network side based upon a radio resource management strategy of the multi-connectivity user equipment, and the target primary network entity is a target anchor of the multi-connectivity user equipment when the target network side is in the target network side configuration effective state;
• the transceiver is configured to transmit and receive data under the control of the processor.