Patent ID: 7587592

Claim:
A terminal unit comprising: a memory in communication with a processor; and the processor configured to: communicate with a wireless network portion of a transmission system; transmit, via the wireless network, a first transmission request in order to receive an application descriptive file from an information provider server in the transmission system based on a storage location of the application descriptive file in the transmission system; store the application descriptive file in the memory after receipt of the application descriptive file, wherein the application descriptive file includes a storage location for application software in the transmission system and a storage location of a security descriptive file in the transmission system; transmit a second transmission request, via the wireless network, comprising the storage location of the security descriptive file stored in the application descriptive file in order to receive the security descriptive file associated with the application software; in response to receipt of the security descriptive file, store the security descriptive file associated with the application software, wherein the security descriptive file includes authorization information associated with the application software, and wherein the authorization information includes an authorization to execute the application software on the processor of the terminal unit; transmit a third transmission request to receive the application software based upon the storage location for application software stored in the application descriptive file; restrict operation of the application software on the processor of the terminal unit in accordance with the authorization information contained in the security descriptive file.