Smiths Medical Asd, Inc.

Landis+gyr Innovations, Inc.

Landis+gyr Technology, Inc.

Ashok Mahadevan

Robert L Snyder

Pushpesh Kumar Deshmukh

John Bettendorff

Michael Gerard Demeter

Timothy James Rutten

Cary McGhin

Zhan Liu

Timothy Rutten

Techniques for secure team-based communication on existing wireless mesh networks are disclosed. In an example, a first network node receives a network encryption key from a headend system. The first network node receives a sub-group encryption key that is unique to a sub-group of nodes, a sub-group identifier, and a sub-group node list that lists the sub-group of nodes associated with the sub-group identifier. The first network node generates an application layer message for a second node of the sub-group of nodes at an application layer. The first network node encrypts the application layer message using the sub-group encryption key. The first network node generates a team packet that is addressed to a selected node and includes the encrypted application layer message and the sub-group identifier. The first network node encrypts the team packet using the network encryption key and transmits the encrypted team packet to the selected node.

Secure peer-to-peer communication over wireless mesh networks

Systems and methods for secure team-based communication on existing wireless mesh networks are disclosed. In an example network with multiple network nods, a headend system designates a first network node and a second network node as a sub-group of nodes, generates a sub-group encryption key that is unique to the sub-group of nodes, and transmits the sub-group encryption key and the sub-group node list and to the first node and the second node. The first node encrypts an application layer message with the sub-group encryption key and sends the message to the second node. The second node decrypts the application layer message with the sub-group encryption key and performs an action based on the message.

A heated breathing circuit detection system verifies the proper set up and connection of a breathing circuit to a heater unit of a humidification system. The detection system automatically detects that the breathing circuit is connected to the heater unit, and the nature of the heating circuit(s) thereof. In one embodiment, the resistance of the heating circuit(s) is determined and compared to an expected resistance or range of acceptable resistances to determine if the heater circuit(s) is properly or actually attached and properly operating. The humidification system also has the ability to determine the delivery mode of the breathing circuit, i.e., whether a single inspiratory limb, or both inspiratory and expiratory limbs, is connected to the heater unit.

Heated breathing circuit detection

A heater unit includes power failure management to detect disruptions in the electrical power supply, such as the AC supply, for the unit. The heater unit emits an audible alarm in response to detection of such a disruption, and may shut down the heater(s) and visuals display(s). The heater unit advantageously includes a power storage device, such as a super-capacitor, to temporarily power the electronic circuitry of the heater unit. Operating parameters, such as of a processor of the electronic circuitry, may be stored in a non-volatile memory response to the disruption, and recalled if the disruption terminates before the level of power has gotten too low to sustain reliable operation of the processor.

Growing community of inventors

Alpharetta, GA, United States of America

Ashok Mahadevan