Method for regrouping multiple groups and device

A non-transitory computer-readable medium comprising computer program code stored thereon, which is executable by one or more digital processors for providing system configurations, the computer program code including:

• instructions for generating a group regrouping creation message,
• wherein the group regrouping creation message comprises identifiers of N mission critical push-to-talk (MCPTT) groups, and
• wherein the group regrouping creation message requests a group management functional entity to create, according to the identifiers of the N MCPTT groups, a temporary group that is initiated by a first MCPTT user and into which the N MCPTT groups are regrouped,
• wherein N is an integer greater than or equal to 2, and
• wherein the group management functional entity is located in a home network of the first MCPTT user;
• and
• instructions for sending the group regrouping creation message to the group management functional entity.

A non-transitory computer-readable medium comprising computer program code stored thereon, that is executable by one or more processors for providing system configurations, the computer program code including:

• instructions for receiving a group regrouping creation message from first user equipment (UE),
• wherein the group regrouping creation message comprises identifiers of N mission critical push to talk (MCPTT) groups,
• wherein N is an integer greater than or equal to 2,
• wherein the group regrouping creation message requests a first group management functional entity to create, according to the identifiers of the N MCPTT groups, a temporary group which is initiated by a first MCPTT user and into which the N MCPTT groups are regrouped, and
• wherein the first group management functional entity is in a home network of the first MCPTT user;
• and
• instructions for configuring information about the temporary group, wherein the configured information about the temporary group comprises:
• an identifier of the temporary group into which the N MCPTT groups are regrouped, and the identifiers of the N MCPTT groups.

A communications method comprising:

• receiving, by a first group management functional entity, a group regrouping creation message from first user equipment (UE),
• wherein the group regrouping creation message comprises identifiers of N mission critical push-to-talk (MCPTT) groups,
• wherein the group regrouping creation message requests to create, according to the identifiers of the N MCPTT groups, a temporary group that is initiated by a first MCPTT user,
• wherein the N MCPTT groups are regrouped into the temporary group, N is an integer greater than or equal to 2, and
• wherein the first group management functional entity is located in a home network of the first MCPTT user;
• sending, by the first group management functional entity, the group regrouping creation message to a second group management functional entity, wherein the second group management functional entity manages a first MCPTT group of the N MCPTT groups;
• sending, by the second group management functional entity, a group regrouping response message to the first group management functional entity;
• and
• configuring, by the first group management functional entity, information about the temporary group according to the group regrouping response message.