Group call method, device and terminal

A radio access network (RAN) device, wherein the RAN device comprises:

• a processor, configured to obtain a number of subgroups in a group, wherein the number of the subgroups in the group is calculated according to a load of the RAN device by a core network (CN) device or the RAN device, wherein terminal information in each subgroup is not maintained by the CN device or the RAN device;
• and
• a transmitter, configure to send a paging message carrying relevant information of the number of the subgroups, so that a terminal receiving the paging message determines, according to the relevant information of the number of the subgroups, whether to respond to the paging message.

A core network (CN) device, wherein the CN comprises:

• a transmitter, configured to send a load of the CN device to a radio access network (RAN) device, so that the RAN device calculates an allowed access density according to the load of the CN device, calculates a number of subgroups in a group according to the allowed access density and the load of the RAN device, wherein terminal information in each subgroup is not maintained by the CN device or the RAN device, and sends the paging message carrying relevant information of the number of the subgroups, wherein the relevant information of the number of the subgroups is used by a terminal receiving the paging message to determine whether to respond to the paging message.

A core network (CN) device, wherein the CN comprises:

• a processor, configured to calculate an allowed access density according to a load of the CN device, and
• a transmitter, configured to send the allowed access density to a radio access network (RAN) device, so that the RAN device calculates, according to the allowed access density and the load of the RAN device, a number of subgroups in a group, wherein terminal information in each subgroup is not maintained by the CN device or the RAN device, and sends the paging message carrying relevant information of the number of the subgroups, wherein the relevant information of the number of the subgroups is used by a terminal receiving the paging message to determine whether to respond to the paging message.