Tracking-area update method and apparatus, communication device, and storage medium

A tracking area update method, performed by a core network, the method comprising:

• receiving auxiliary information comprising location information and movement information of User Equipment (UE), the auxiliary information being configured to determine whether the UE is located in a boundary of two Tracking Areas (TAs) by the core network;
• and
• sending TA indication information in response to receiving the auxiliary information,
• wherein the TA indication information comprises TA information and boundary indication information for indicating a boundary of the two TAs;
• wherein the TA information comprises a parameter for triggering the UE to perform Tracking Area Update (TAU), a Tracking Area Code (TAC), and a TAC change waiting time;
• wherein the TA information is configured to indicate to the UE to perform the TAU according to the TAC within the TAC change waiting time;
• and
• wherein the TAC change waiting time is determined according to ephemeris information of a satellite corresponding to a base station and the auxiliary information.

A communication device, comprising:

• a processor;
• and
• a memory for storing executable instructions capable of running on the processor,
• wherein the processor is configured to:
• report auxiliary information comprising location information and movement information of User Equipment, the auxiliary information being configured to determine whether the UE is located in a boundary of two Tracking Areas (TAs) by a core network,
• receive, from a base station, TA indication information determined by the core network according to the auxiliary information,
• receive a System Information Block (SIB) from the base station according to the TA indication information, and
• perform Tracking Area Update (TAU) according to the SIB;
• wherein the TA indication information comprises TA information;
• wherein the TA information comprises a Tracking Area Code (TAC), a TAC change waiting time, and a parameter for triggering the UE to perform the TAU;
• wherein the TAC change waiting time is determined by the core network according to ephemeris information of a satellite corresponding to the base station and the auxiliary information;
• and
• wherein the processor is further configured, when receiving the SIB from the base station according to the TA indication information, to receive, according to the TAC change waiting time, the SIB broadcast by the base station during a predetermined time period comprising a waiting end time of the TAC change waiting time.