Abstract:
A method to wirelessly network a sensor/actuator node is described. The sensor/actuator node is installed in a sensor/actuator node network and arranged in a hierarchical manner with a plurality of node levels and a cluster head network. A unique node identifier is assigned to the sensor node and the sensor node network is initialized. The sensor node is woken-up to perform a task and then set to an active low power mode.
Abstract:
A method and system of enhancing an operational lifetime of a wireless network is provided, which includes monitoring a link quality between node elements of the wireless network, periodically collecting information regarding the link quality between node elements of the wireless network, and reconfiguring a network topology of the wireless network based on the collected information.
Abstract:
A method and system to synchronize a first device and a second device includes generating a first tone by the first device, the first tone one of including an identity of the second device and generated at a predefined time, receiving the first tone by the second device, setting a clock of the second device based on the received first time, and sending an acknowledgment by the second device to the first device.
Abstract:
A method and system of enhancing an operational lifetime of a wireless network is provided, which includes monitoring a link quality between node elements of the wireless network, periodically collecting information regarding the link quality between node elements of the wireless network, and reconfiguring a network topology of the wireless network based on the collected information.
Abstract:
A method for transmitting data from a sender node from among at least one sender node to a receiver node in a wireless network, the method including (a) sampling, by the receiver node, in each time slot, a main network frequency and at least one backup frequency, (b) transmitting, by the sender node, a message on the main network frequency in a first time slot, without using a multiple access protocol, (c) transmitting, by the sender node, the message on the main network frequency in a next time slot, using the multiple access protocol exchange, if an acknowledgement of the message is not received from the receiver node, (d) transmitting, by the sender node, the message on at least one backup frequency in the next time slot, using a multiple access protocol, if the main network frequency is busy after performing step (c), (e) repeating steps (c) and (d) for a predefined number of time slots, unless or until an acknowledgement is received from the receiver node, (f) transmitting, by the sender node, the message on each backup frequency, using the multiple access protocol, unless or until an acknowledgment is received from the receiver node, and (g) performing an exponential backoff and subsequent transmission of the message, by the sender node, if an acknowledgement is still not received from the receiver node after performing steps (a) through (f)
Abstract:
A method and system to reduce delay and/or conserve energy in sending a message from a source node to a destination node of a multi-hop wireless network, includes broadcasting the message by the source node, receiving the message by at least one other node of the multi-hop wireless network, and providing an acknowledgment by the at least one other node if the at least one other node does not hear an acknowledgment from a node that is closer to the destination node.
Abstract:
A method for shared access of a communication channel is provided, which includes dividing access to the communication channel into a plurality of time slots, and allocating the time slots, at least partially, based on a priority of use of the communication channel.