MESSAGE TRANSMISSION PROTOCOL FOR SERVICE DELIVERY NETWORK

摘要

A reliable protocol is provided for transporting messages between a vehicle-based system and a service delivery network. The protocol is a request/response protocol and can be passed over half duplex or full duplex lines, using a data over voice communication method through a nomadic device such as a PDA or cell-phone. The protocol can also be passed over a data connection such as a dial-up or broadband connection on a nomadic device having a data plan.