Patent ID: 7292851

Claim:
A message transmission system having a first apparatus to create a message, a second apparatus to send the message created by said first apparatus, and a third apparatus to perform radio communication, wherein said first apparatus comprises: a unit for creating a transmission message having an area address which indicates an area as a destination, and a unit for transmitting said transmission message to said second apparatus, and wherein said second apparatus comprises: a unit for receiving said transmission message said first apparatus sent, a unit for storing said received transmission message to a storage device, a unit for checking whether said third apparatus exists in an area indicated by said area address which is set in said transmission message as a destination, and a unit for sending said transmission message to said third apparatus as a destination, in case that said third apparatus exists in said area, wherein said second apparatus repeats processes by said unit for checking and said unit for sending, in case that said third apparatus exists in said area.