Delivering information to an idle mobile station in a group communication network includes delivering the information to the mobile station in special form, e. The harmonica includes a pair of a blow reed and a draw reed in each of an upper part and a lower part of a hole and has four tone rows of a tone row for the upper blow reeds, a tone row for the upper draw reeds, a tone row for the lower blow reeds, and a tone row for the lower draw reeds. The performance of each portion of the flow graph on each VM is monitored.