The invention provides a temporary group calling implementation method in a digital
trunk system. The temporary group calling implementation method in the digital
trunk system comprises the followingsteps: a
trunk core network receives group calling establishment request information sent by a calling terminal, wherein the group calling establishment request comprises a specific number; the trunkcore network judges the requested group calling as temporary group calling according to the specific number, sends temporary group user
list request information to a
location information server and receives the temporary group user
list sent by the
location information server; the trunk
core network creates a temporary group according to the temporary group user
list and assigns a temporary groupnumber to the temporary group; the trunk
core network pushes the temporary group information to the members in the group; and the trunk core network assigns calling identifiers, establishes the groupcontext, and sends group calling establishment response information to the calling terminal, wherein the group calling establishment response information comprises the temporary group user list. According to the temporary group calling implementation method in the digital trunk
system, the calling process does not require a dispatching
desk to participate, and does not write to the
database, therefore, multiple dynamic regrouping operations in the temporary group calling implementation method in the prior art are avoided, and the process is simplified.