Abstract: A method for testing a network connection of an emergency response system at least including a remote device and a central station includes: receiving, by the remote device, a user's instruction or an automatically triggered event for initiating a test of the network connection between the remote device and the central station; in response to the user's instruction or the automatically triggered event, sending, by the remote device, a first test signal to the central station; receiving, by the remote device, a first response signal sent from the central station for acknowledging the first test signal; and in response to receiving no first response signal from the central station for acknowledging the first test signal, alerting, by the remote device, a user of the remote device about a failure of the network connection.

Abstract: A location service method for a wireless device includes: detecting one or more wireless access points; obtaining identification information and distance information of each of the one or more wireless access points; sending a location service request including the obtained identification information and the obtained distance information of each of the one or more wireless access points to a location service server; and receiving at least location information of the wireless device from the location service server.

Abstract: The present disclosure provides a method and a system for fall detection. Measurement signals are received from a plurality of sensors to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information. According to a signal processing sequence, whether the measurement signals meet multiple qualifying conditions for a fall incident is determined. The multiple qualifying conditions include: a condition evaluating at least the motion information, and a condition evaluating at least the physiological information. The method further includes: when the measurement signals do not meet the multiple qualifying conditions, continuing to monitor the user activities; and when the measurement signals meet the multiple conditions, determining that a fall incident has occurred, and sending an alert message to a designated contact.

Abstract: A method is provided for a wireless communication device containing at least a main processor for data processing, and a transmitter and a receiver for wireless communication. The method includes providing power to the main processor using a power source via a power switch, performing device initialization of the wireless communication device, and determining whether the wireless communication device recovers from a power-down standby mode, where the power source is disconnected to the main processor such that the main processor does not consume power from the power source. Further, the method includes recovering device states based on information stored on a non-volatile storage when it is determined that the wireless communication device recovers from a power-down standby mode. The method also includes reporting device status including at least battery level of the wireless communication device to an external server based on configuration information on the wireless communication device.