MESSAGE INTEGRITY FOR SECURE COMMUNICATION OF WIRELESS MEDICAL DEVICES
First Claim
1. A network system comprising:
- a plurality of medical devices for sending or receiving messages to one another, each message including a data portion and a timestamp, each medical device including;
a sensor which is attached to a patient to at least confidentially monitor a recurring vital sign; and
a timestamp generating means for generating the recurring vital sign based timestamp.
1 Assignment
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Accused Products
Abstract
A system for securely synchronizing medical devices and providing message integrity with timeliness and uniqueness (10) includes a plurality of medical wireless devices (121, 122, . . . , 12n). The medical devices (121, 122, . . . , 12n) communicate wirelessly with one another. Each message (M) includes a data portion and a timestamp. Each medical device (121, 122, . . . , 12n) includes a sensor (14) which is attached to a patient to monitor a common vital sign. The medical devices (121, 122, . . . , 12n) are synchronized when the sensor (16) of each medical device detects a peak of the vital sign function. At this moment, internal clocks of each medical device (121, 122, . . . 12n) are zeroed and each internal timer starts counting time. Thus, the medical devices are loosely synchronized at approximately the same time. Each generated message (M) is timestamped with a sent time (TSEND) generated by a time count. The generated time stamp (TSEND) of the message (M) is validated against a receive time (TRECEIVE) of the receiving medical device internal clock count. If the message (M) arrives out of the prespecified acceptance window, the message (M) is rejected by the receiving medical device
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Citations
20 Claims
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1. A network system comprising:
a plurality of medical devices for sending or receiving messages to one another, each message including a data portion and a timestamp, each medical device including; a sensor which is attached to a patient to at least confidentially monitor a recurring vital sign; and a timestamp generating means for generating the recurring vital sign based timestamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of networking among medical devices, which each includes a sensor, the method comprising:
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attaching the sensors to a patient body; at least monitoring a recurring vital sign of the patient; generating a recurring vital sign based timestamp; and sending and receiving messages from one medical device to another, each message including a data portion and the timestamp. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification