摘要:
Monitoring device modules (10) in containers on a ship are polled by a tracking proxy (12). Monitoring data is thus captured, and the proxy 12 can ascertain in real time that the correct group of containers is present. The proxy (12) also transmits higher-value report messages with relatively low bandwidth via a satellite communication system (13) to a gateway (15). The gateway (15) routes the messages on to various systems such as tracking centers. Also, the gateway (15) regularly polls and authenticates the distributed tracking proxies (12) within its group.
摘要:
A radio interference avoidance system (1) has a processor in a detection system (11) which receives real time inputs from various sensors (12-16). The processor dynamically determines if a craft (for example, ship) movable network (19) is within an interference distance of a fixed network. It uses real time craft position data relative to fixed network position and also radiation characteristic data for both the movable (19) and fixed networks.
摘要:
Systems and methods for parallel, discrete, simulations include functional capabilities to incorporate one or more human operators or actors into the simulation process. Such individuals can be presented situations where one or more decisions are necessary with respect to ongoing events. Entered decisions are incorporated into simulated events and activities being simulated. These in turn influence the behavior of those entities and also initiate the occurrence of other time-based processes. An architecture artifact or product can be automatically created or updated by recording how a sequence of events took place. The creation of sections of the DoDAF OV-6C Operational Event Trace architectural diagram, for the executable architecture model, can be automatically performed to dynamically provide event traces in response to a live exercise.
摘要:
A mobile network comprises remote base transceiver station (BTS) nodes (3, 4) linked with a central base station controller (BSC) node (9). The latter is in turn linked with a mobile switching centre (MSC, 10), a visitor location register (VLR, 11), and a home location register (HLR, 8). Mobile stations (2, MS-A, MS-B, and MS-C) are located in the cells of the BTSs (3, 4). The remote nodes (3, 4, 3(a), 4(a)) are connected to the central node BSC (9) over a remote backhaul satellite connection. Calls are routed locally while the central nodes continue to manage calls and services from central feature-rich and typically more reliable switches of a core network. This means that calls set up between subscribers on the same remote node get connected within the remote node but call supervision is still carried out by the central nodes. The features and services of the existing core network are preserved. For example, if the calling subscriber is a pre-paid GSM subscriber and their account runs out during the call a release signal will still be sent from the central node to the remote even though the voice traffic is being handled by the remote node.
摘要:
A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a first preamble for a first antenna of the MIMO communication, wherein the first preamble includes a carrier detect field, a first channel select field, a first signal field, and a second signal field. The method continues by generating a second preamble for at least one other antenna of the MIMO communication, wherein the second preamble includes the carrier detect field, a plurality of channel select fields, and the second signal field. The method continues by simultaneously transmitting the carrier detect field via the first antenna and the least one other antenna. The method continues by transmitting the first channel select field and the first signal field via the first antenna. The method continues by, subsequent to the transmitting the first channel select field and the first signal field via the first antenna, transmitting the plurality of channel select fields via the at least one other antenna. The method continues by simultaneously transmitting the second signal field via the first antenna and the at least one other antenna.
摘要:
Monitoring device modules (10) in containers on a ship are polled by a tracking proxy (12). Monitoring data is thus captured, and the proxy 12 can ascertain in real time that the correct group of containers is present. The proxy (12) also transmits higher-value report messages with relatively low bandwidth via a satellite communication system (13) to a gateway (15). The gateway (15) routes the messages on to various systems such as tracking centres. Also, the gateway (15) regularly polls and authenticates the distributed tracking proxies (12) within its group.
摘要:
A communication system comprises an adapter (10) having interfaces (25-27) linked with user device components (12). A terminal controller (29) dynamically associates the components in real time to provide mobile stations. Thus, passengers of an aircraft can insert SIM cards into conveniently-located readers (22) and use in-flight entertainment i/o devices to make and receive cellular calls. The adapter (10) also has a BTS emulator (30) for direct communication with a BSC (3) with non-wireless internal network communication. This avoids the need for a mobile station to BTS wireless link.
摘要:
A method for multiple input multiple output wireless communication begins by determine the protocol utilized by each of the wireless communication devices within the proximal region. The method continues by determining whether the protocols of the wireless communication devices within a proximal region are of a like protocol. The method continues by determining the a number of transmit antennas. The method continues, when the protocols of the wireless communication devices within a proximal region are of the like protocol, formatting preamble of a frame of a wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.
摘要:
A releasable locking assembly including a housing, a body defining a longitudinally extending flow bore having a first end and a second end disposed within the housing, a window defined through a radial wall of the body, a locking segment having an outer convex surface of a first radius defined by distance from a first axis, and an inner concave surface of a second radius defined by distance from a second axis different than the first axis, the locking segment disposed at least in part in the window, and a support member disposed within the body and moveable between a position where the support member drives the locking segment into engagement with the housing and a position where the support member unsupports the locking segment with regard to engagement with the housing.
摘要:
A preamble of a frame for a multiple input multiple output (MIMO) wireless communication for a first transmit antenna of the MIMO communication includes a legacy preamble portion in accordance with a legacy wireless communication protocol. The preamble of the frame for the MIMO wireless communication for the first transmit antenna also includes a current protocol preamble portion in accordance with a protocol of the MIMO wireless communication. The preamble of a frame for at least a second antenna of the MIMO communication includes a cyclically shifted legacy preamble portion for the frame. The preamble of the frame for the MIMO wireless communication for the second transmit antenna also includes a second current protocol preamble portion in accordance with a protocol of the MIMO wireless communication.