Patent ID: 8135442
Filing Date: 2012-03-13
Classification: H04L

Abstract:
1. A communication apparatus for use in a vehicle, wherein a data communication is established wirelessly between the communication apparatus and a communication unit that is installed in a station, the communication apparatus comprising: a transmission repeater unit transmitting transmission data to the communication unit repeatedly until receiving an acknowledgement of a reception completion of the transmission data from the communication unit; a transmission termination unit terminating repeated transmissions of the transmission data by the transmission repeater unit when a number of repeated transmissions of the transmission data reaches a standard value; and a re-number unit changing the standard value of the repeated transmissions of the transmission data based on content of the transmission data from the communication unit; wherein the communication unit transmits a Beacon Service Table (BST) signal that includes an Application Entity ID (AID) data value for specifying an application type, and further wherein the re-number unit changes the standard value of the repeated transmissions of the transmission data based on the AID data value; and the re-number unit decreases the standard value of the repeated transmissions in a case that the AID data value indicates that the application type provided by the communication unit is not the electronic toll collection application, in comparison to a case that the AID data value indicates that the application type provided by the communication unit is an electronic toll collection application.