Abstract: A first device communicates with a wireless network that includes nodes that are active for predefined activation times and that are at least partially dormant when not active. The communication method includes identifying a start of communication via a message that exceeds a maximum activation time of nodes on the wireless network by a factor N, where N is equal to at least a maximum number of frequencies on the wireless network, and exchanging information with a second device comprising a node on the wireless network that is within a transmission range of the first device, where the information is exchanged following the message and includes frequency hopping data for the second device.

Abstract: A multi-processor computing system included a plurality of processing units is provided in which each of the plurality of processing units operates at clock frequency and a coordinating protocol is used to assign tasks and operations to any of the plurality of processing units in a manner such that the power efficiency of the system is optimized.

Abstract: A target device joins a wireless network by attempting to locate an existing routing device in a predefined neighborhood of the wireless network, designating the existing routing device as a master routing device if the existing routing device is located in the predefined neighborhood, where the master routing device is a primary recipient of data from the target device, and attempting to locate endpoint devices in the predefined neighborhood if the existing routing device is not located in the predefined neighborhood.

Abstract: A multi-processor computing system included a plurality of processing units is provided in which each of the plurality of processing units operates at clock frequency and a coordinating protocol is used to assign tasks and operations to any of the plurality of processing units in a manner such that the power efficiency of the system is optimized.

Abstract: A system includes wireless network devices and a terminal device. The wireless network devices include a base station and plural repeater devices for routing data. The terminal device runs a network protocol to establish a presence in a wireless network that includes the wireless network devices. The terminal device enters a low-power mode when not communicating over the wireless network.

Abstract: A multi-processor computing system included a plurality of processing units is provided in which each of the plurality of processing units operates at clock frequency and a coordinating protocol is used to assign tasks and operations to any of the plurality of processing units in a manner such that the power efficiency of the system is optimized.

Abstract: A monitoring system for monitoring the health status of a patient by performing measurements such as skin temperature, blood flow, blood constituent concentration, and pulse rate at the finger of the patient. The monitoring system has an inner ring proximate to the finger as well as an outer ring, mechanically decoupled from the inner ring, that shields the inner ring from external loads. Measurements are performed in accordance with a protocol that may be preprogrammed, or may be modified on the basis of real-time data or by command from a remotely located medical professional.