Patent ID: 7904169
Filing Date: 2011-03-08
Classification: A61N,H04B,Y10S

Abstract:
1. A method for data transmission between an implantable medical device and an external system, the method comprising: producing channel selection commands each specifying a channel in a scan channel list when a scan timer escape interval expires, the scan channel list including channels selected from a plurality of channels each representing a predetermined frequency band; performing a channel hopping in response to each of the channel selection commands, the channel hopping making the channel specified in the each of the channel selection commands an active channel; performing data transmission between the implantable medical device and the external system using the active channel during a synchronous scan mode during which the channel hopping in the external system and the channel hopping in the implantable medical device are controlled to be synchronous; starting an asynchronous scan mode in response to interruption of the data transmission resulting from making a predetermined number of attempts to transmit data using different channels in the scan channel list without success; and restoring the synchronization of the channel hopping in the external system and the channel hopping in the implantable medical device during the asynchronous scan mode.