摘要:
A system is provided for transmitting generally static media. The system (10) comprising an electronic device (12) and a digital audio transmitter (14). The electronic device (12) has a CPU (16), a storage medium (18), a display (20), a user interface (22), and a digital audio broadcast receiver (26). The digital audio transmitter (14) has a specialized broadcast server (30). The digital audio broadcast receiver (26) receives and decodes the digital audio signal transmitted by the digital audio transmitter (14).
摘要:
Scheme and apparatus (10) for distinguishing services offered by a service-providing device in adjacency of the apparatus (10) from services offered by a service-providing device not being in the apparatus' adjacency. All devices—including the apparatus—are part of a wireless local network. The apparatus (10) maintains a record with information about services and associated identifiers as well as a list of identifiers about the service-providing devices. The associated identifiers and the list of identifiers are compared to determine an associated service as being in adjacency of the apparatus if it is rendered by a service-providing device being listed in the list of identifiers. An associated service is determined as not being in adjacency of the apparatus if it is rendered by a service-providing device not being listed in the list of identifiers. The apparatus (10) comprises a network interface (25) for wireless communication with the service-providing devices, and a service discovery module (11) which maintains the record with information services and associated identifiers.
摘要:
Methods, system and apparatus are provided for advertising service offerings in a communication system. An example embodiment comprises at least one device. A first device broadcasts a message of a first type, chooses a value for a time limit and listens for a message sent by a second device. If no message has been received before time limit, elapse, it again broadcasts a message of a first type. Otherwise, the message received from said second device is analyzed and if said message includes valid information about said first device chooses a value for the time limit. However, if said message received does not include valid service description about said first device, a message of a second type is broadcast. This reduces useless broadcast of a complete service list. Broadcast may be initiated more often and, service discovery for new devices coming into proximity takes less time.
摘要:
Methods, system and apparatus are provided for advertising service offerings in a communication system. An example embodiment comprises at least one device. A first device broadcasts a message of a first type, chooses a value for a time limit and listens for a message sent by a second device. If no message has been received before time limit, elapse, it again broadcasts a message of a first type. Otherwise, the message received from said second device is analyzed and if said message includes valid information about said first device chooses a value for the time limit. However, if said message received does not include valid service description about said first device, a message of a second type is broadcast. This reduces useless broadcast of a complete service list. Broadcast may be initiated more often and, service discovery for new devices coming into proximity takes less time.
摘要:
There is provided a method and a system for documenting a transfer of authority of control for a container from a first entity of a transportation chain to a second entity of the transportation chain. The first entity transfers an electronic container control certificate to an electronic seal of the respective container, which electronic container control certificate comprises a cryptographic key associated to the second entity, and which container control certificate is digitally signed by the first entity. The container control certificate is stored in a log of the electronic seal.
摘要:
A method for tracking a plurality of containers each joined to an electronic tracking device having routing capabilities and a WPAN-enabled radio receiver/transmitter configured to attempt to connect to a pre-configured WPAN upon being activated comprises activating the radio receiver/transmitter of each tracking device joined to a container being loaded onto a cargo vessel; receiving an indication from each tracking device that fails to connect to the WPAN; intermittently performing a network scan to locate each WPAN-connected tracking device; intermittently configuring the WPAN to include each WPAN-connected tracking device in a hybrid tree-mesh network topology; intermittently configuring routing information stored on each WPAN-connected tracking device to maintain mutual communication with each WPAN-connected tracking device and enable mutual communication between each WPAN-connected tracking device; receiving transport-related data from each WPAN-connected tracking device; transmitting the transport-related data to a control station through a LAN on the vessel; broadcasting a request to be routed between the WPAN-connected tracking devices in a depth-first traversal of the network topology that directs each WPAN-connected tracking device to enter a low-power mode when the depth-first traversal backtracks from the tracking device; and receiving an acknowledgment of the request communicated from each WPAN-connected tracking device when the tracking device enters the low-power mode.
摘要:
A WPAN system for establishing communication between a control station of a cargo vessel and a plurality of containers that are loaded onto the vessel is provided that comprises a base station configured to establish and manage a pre-configured WPAN having a hybrid tree-mesh network topology and a plurality of electronic tracking devices each being provided with a WPAN-enabled radio receiver/transmitter and routing capabilities. The base station is configured to communicate with the control station through a local area network on the vessel. Each tracking device is configured to be joined to a respective container of the plurality of containers and to connect to the WPAN upon being activated. The base station is configured to intermittently perform a network scan to locate each tracking device that is connected to the WPAN and dynamically reconfigure the network topology to include each tracking device connected to the WPAN to maintain mutual communication with each connected tracking device using the routing capabilities of the tracking devices.
摘要:
A method for tracking a plurality of containers each joined to an electronic tracking device having routing capabilities and a WPAN-enabled radio receiver/transmitter configured to attempt to connect to a pre-configured WPAN upon being activated comprises activating the radio receiver/transmitter of each tracking device joined to a container being loaded onto a cargo vessel; receiving an indication from each tracking device that fails to connect to the WPAN; intermittently performing a network scan to locate each WPAN-connected tracking device; intermittently configuring the WPAN to include each WPAN-connected tracking device in a hybrid tree-mesh network topology; intermittently configuring routing information stored on each WPAN-connected tracking device to maintain mutual communication with each WPAN-connected tracking device and enable mutual communication between each WPAN-connected tracking device; receiving transport-related data from each WPAN-connected tracking device; transmitting the transport-related data to a control station through a LAN on the vessel; broadcasting a request to be routed between the WPAN-connected tracking devices in a depth-first traversal of the network topology that directs each WPAN-connected tracking device to enter a low-power mode when the depth-first traversal backtracks from the tracking device; and receiving an acknowledgment of the request communicated from each WPAN-connected tracking device when the tracking device enters the low-power mode.
摘要:
In one embodiment, a computer-implemented method for authentication by kinematic pattern match is provided. The computer implemented method prompts a user for a kinematic input, receives an element of a kinematic pattern to form a set of received elements, and determines whether there are additional elements of the kinematic pattern. Responsive to a determination that there are no additional elements of the kinematic pattern, forms a kinematic pattern from the set of received elements and computes a signature from the set of received elements. The computer implemented method further determines whether the signature matches a predetermined value, and responsive to a determination that the signature matches a predetermined value, sends an authentication signal.
摘要:
A method and apparatus for controlling a computer device with a limited user-interface via a remote computer device having a more powerful user interface. Both computer devices are interconnected via a wireless communication channel and both computer devices support a common communications protocol. User-interface information is sent from the computer device with a limited user-interface to the remote computer device to provide a user-interface at the remote computer device for receiving user input at the remote computer device. The user input controls the computer device with a limited user-interface to execute commands therein corresponding to the user input.