摘要:
In a wireless network that includes a plurality of nodes, a method of maintaining, by a first node, information regarding communications links between nodes in the wireless network includes: for each communications link that is established with another node, recording an identification of the other node; and for each message received by the first node from the other node through the communications link with the other node, recording a network pathway by which the message has been sent in the wireless network, the network pathway identifying the nodes and the communications links therebetween by which the message has been sent. Another method includes recording, by a server, for each message that is received by the server from the wireless network, a network pathway by which the message has been sent, the network pathway identifying the nodes and the communications links therebetween by which the message has been sent.
摘要:
A wireless data communications network system for establishing communication between a server and a plurality of containers that are loaded onto a cargo vessel. The system includes a data communications device configured to establish and manage a pre-configured wireless data communications network and to communicate with the server through a local area network, and a plurality of electronic tracking devices each having a wireless transceiver and routing capabilities and configured to be joined to a container and to connect to the wireless data communications network upon being activated. The data communications device is configured to intermittently perform a network scan to locate each tracking device connected to the network and reconfigure the network topology to include each connected tracking devices such that the data communications device maintains mutual communication with each connected tracking device using the routing capabilities of the tracking devices.
摘要:
A network communications method utilizing a network watermark for providing security in the communications includes creating a verifiable network communications path of nodes through a network for the transfer of information from a first end node to a second end node; verifying the network communications path of nodes, by the first end node, before communicating by the first end node information intended for receipt by the second end node; and once the network communications path of nodes is verified by the first end node, communicating by the first end node, via the verified communications path of nodes, the information intended for receipt by the second end node; wherein the network watermark represents the verifiable network communications path of nodes.
摘要:
A method for communicating to a recipient transceiver from a plurality of transceivers located within the broadcast range of the recipient transceiver includes: transmitting a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and subsequent thereto, transmitting a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers. Each of the plurality of transceivers is associated with a respective sensor for acquiring data and transmitting the data to the recipient transceiver.
摘要:
A method for communicating to a recipient transceiver from a plurality of transceivers located within the broadcast range of the recipient transceiver includes: transmitting a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and subsequent thereto, transmitting a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers. Each of the plurality of transceivers is associated with a respective sensor for acquiring data and transmitting the data to the recipient transceiver.
摘要:
A wireless transceiver includes: (a) a low power radio frequency (LPRF) communications component capable of powering down to conserve energy and capable of powering up in response to an electronic signal, the LPRF communications component including a transmitter and a first receiver; and (b) a second receiver that is configured to screen a radio frequency broadcast and provide, on the basis of specific data identified therein, the electronic signal to the LPRF communications component in order to power up the LPRF communications component. The second receiver is adapted to draw less current than the LPRF communications component while awaiting receipt of and listening for a radio frequency broadcast.
摘要:
A method of securing a container includes inserting, into a seal device at a container, an electronic bolt; reading, by the seal device, a serial number stored in the electronic bolt; communicating, from the seal device, to a user application, insertion of the bolt; scanning, by the user via a handheld device, a barcode on the seal device representative of an identification of the seal device; communicating, from the handheld device to the user application, the identification of the seal device; inputting, by a user at the container via the handheld device, information associated with the container; communicating, from the handheld device to the user application, the information associated with the container; associating, in a database by the user application, the information associated with the container with the bolt serial number and the identification of the seal device; communicating, by the user application, a confirmation to the seal device.
摘要:
A computer performs a method comprising the steps of, for each application, creating, for such application, a virtual machine that is associated with sending and receiving of communications over the computer network, determining, for such application, a network protocol out of a plurality of available network protocols, the determined network protocol representing an appropriate network protocol, out of the plurality of available network protocols, for current communication requirements of the application, and causing the application, when communicating over the network, to send and receive communications via the created virtual machine using the determined network protocol. Multiple virtual machine instances are created and simultaneously maintained by the computer, each virtual machine instance is associated with communications of one of the plurality of applications via a networking protocol that has been determined to be appropriate for the current communication requirements of the application.
摘要:
In a wireless class-based data communications network, a class-switching method includes configuring a wireless two-way RF data communication device, of a wireless class-based data communications network, to adopt a different class designation of another wireless two-way RF data communication device of a proximate wireless class-based data communications network such that the particular wireless two-way RF data communication device joins the proximate wireless class-based data communications network. Another class-switching method includes communicating a command to a wireless two-way RF data communication device of a wireless class-based data communications network to change its class designation to that of another wireless two-way RF data communication device of a proximate wireless class-based data communications network such that the wireless two-way RF data communication device joins the proximate wireless class-based data communications network.
摘要:
A wireless transceiver includes: (a) a low power radio frequency (LPRF) communications component capable of powering down to conserve energy and capable of powering up in response to an electronic signal, the LPRF communications component including a transmitter and a first receiver; and (b) a second receiver that is configured to screen a radio frequency broadcast and provide, on the basis of specific data identified therein, the electronic signal to the LPRF communications component in order to power up the LPRF communications component. The second receiver is adapted to draw less current than the LPRF communications component while awaiting receipt of and listening for a radio frequency broadcast.