Continuous ECG Transmission via Mobile Telephone Network and Waiting Time of Packets for Smooth Display

摘要

ECG signals received from a long distance call through mobile phone network need to be displayed instantaneously, smoothly and recorded. Due to non-uniform load and inherent time delay in the network the real-time display is incoherent. This will cause some discomfort or inaccuracies in observing the waveform at the critical moment, and then more or less affect the quality of work performed by the healthcare worker. This paper considers the process model as a queuing system which can be simplified as M/D/1 and identifies the dominant parameter as the receiver queueing time which may be dynamically adjusted. To simplify the procedure, the waiting time in the buffer was set to a constant value which was determined empirically by a network simulator and an open-source network analyzer. This was done together with a suitable data packet size selection to optimize the bandwidth utilization, and so a simple data flow management within the receiver can be achieved.