117 results about "Space segment" patented technology

A space segment for a radioterminal communications system includes a satellite having service link antennas of different sizes that are configured to communicate with at least one radioterminal. The service link antennas of different size may serve different sized geographic areas, which may at least partially overlap. Analogous radioterminal communications methods also are provided.

A belt and tread drum having an annular shell comprising a plurality of circumferentially spaced segments, each of which is mounted on a carrier which disposed in circumscribing relationship to a generally cylindrical actuator rotatably connected with a reciprocating piston disposed within a cavity defined between the actuator and a hub fixed to a central core of the drum. Translational movement of the piston between extended and retracted positions in a direction parallel to the rotational axis of the drum is converted into selected rotational movement of the actuator relative to the hub. A plurality of sets of links interposed between the segments and the actuator and hub have their first ends commonly pivotally pinned to a segment. The second end of one link of each set of links is pivotally pinned to the actuator and the second end of the other link of each set of links is pivotally pinned to the hub. Rotation of the actuator relative to the hub controls the arcuate separation of these second ends such that bringing these second ends toward contiguity moves the segments radially outwardly, and conversely, moving these second ends arcuately apart serves to move the segments radially inwardly of the drum. A hand wheel establishes maximum and minimum rotational movement of the actuator and provides a visual indication of the radial positions of the several segments, i.e. the diameter of the drum.

A method and apparatus for providing remote access redirect in a host channel adapter of a system area network are provided. The apparatus and method provide a mechanism by which a host channel adapter, in response to receiving a marker message, places selected channel(s) of the host channel adapter in a remote access redirect (RAR) mode of operation. During the RAR mode of operation, memory access messages received by the host channel adapter that are destined for portions of an application memory space marked as being protected are converted to RAR receive messages and redirected to a queue pair associated with an operating system rather than the queue pair for the application. The operating system is responsible for serializing access to application memory pages outside of the host channel adapter. The mechanisms of the present invention may be used to perform a checkpoint data integrity operation.

The invention provides a global real-time Internet of things (IOT) constellation system. The system includes a space segment including a plurality of low-orbit satellites that are interconnected through inter-satellite links, a ground segment which is used for completing an operation control function and a data distribution and recovery processing function. The ground segment includes a pluralityof constellation gateway stations. The system also comprises a user segment which is used for collecting sensing data and comprises a plurality of user terminals. The constellation gateway stations ofthe ground segment and the user terminals of the user segment communicate with the low-orbit satellites of the space segment through respective links. The system has the advantages that the system isfor the cloud, network and end system level designs of global wide-area space-based IOT applications, and the IOT new connection and management capabilities of multiple industrial mass applications are achieved.

A system for bi-directional data content transfer between a plurality of mobile platforms, such as aircraft or cruise ships, and a ground-based control segment. The system includes the ground-based control segment, a space segment and a mobile system disposed on each mobile platform. The ground-based control segment includes an antenna which is used to transmit encoded RF signals representative of data content to the space segment. The space segment includes a plurality of satellite transponders, with one of the transponders being designated by the ground-based control segment to transmit the encoded RF signals to the mobile system. The mobile system includes steerable receive and transmit antennas. The receive antenna receives the encoded RF signals from the satellite transponder, which are thereafter decoded, demodulated, D/A converted by a communications subsystem and transmitted to a server. The server filters off that data content not requested by any occupants on the mobile system.

A system for providing integrated communications, navigation and surveillance capabilities. A space segment comprises a plurality of time synchronized satellites broadcasting navigation signals and have two-way communication capabilities. A terrestrial segment comprises processing apparatus that communicates with the satellites. A user segment comprises at least one mobile user device capable of two way communication with the plurality of satellites and of using the navigation signals to derive its position. The user device is operable to inform the space segment that the user device is not receiving a navigation signal that the user device is capable of receiving.

The present invention provides a heterogeneous spacecraft network including a network management architecture to facilitate communication between a plurality of operations centers and a plurality of data user communities. The network management architecture includes a plurality of network nodes in communication with the plurality of operations centers. The present invention also provides a method of communication for a heterogeneous spacecraft network. The method includes: transmitting data from a first space segment to a first ground segment; transmitting the data from the first ground segment to a network management architecture; transmitting data from a second space segment to a second ground segment, the second space and ground segments having incompatible communication systems with the first space and ground segments; transmitting the data from the second ground station to the network management architecture; and, transmitting data from the network management architecture to a plurality of data user communities.

A conveyor having a flighted belt and providing a gapless end-off or end-on transfer of articles. The conveyor belt includes segmented flights at spaced intervals along its length. Each segmented flight includes slots dividing the flight into laterally spaced segments, or dogs. A transfer platform allows for a smooth transfer of articles onto or off the end of the belt. Fingers on the transfer platform separated by gaps extend to distal finger tips that are positioned close to the conveying surface of the belt at an end of the conveyor. The transfer platform is laterally aligned with the gaps positioned to coincide with the flight segments to permit them to pass cleanly through as the belt articulates about a sprocket set at the end of a carryway. Optional article-advancing rollers in the conveyor belt between consecutive flights propel articles forward along the belt to a forward flight.

The invention provides a waterproof zipper. In the waterproof zipper, waterproof sheet member is used as space segment linning of waterproof fastener tape, in this way, it is set near zipper teeth, and the back code is foremed on the surface of the sheet member. In the said waterproof zipper, a whole surfaces of a pair of fastener tapes(2)are covered by elastic material, and the zipper teeth(3)made of resin are integrally moulded on the opposite edge(8)and the waterproof sheet member(5)is installed in the space segment(19), therefore it extends on the right and left fastener tapes(2). The front end(30)of the sheet member(5)is set to contact with zipper teeth(3)of end. The back code(4)made of resin is moulding formed by through hole(9)installed on the side of fastener tape(2)and sheet member(5), with a clearance relative to zipper teeth(3). The back code(4)is equipped with protrusion(22), wherein the protrusion(22) has the same thickness with zipper teeth(3)on one side of superface part(24) at the space segment(19).

The invention provides a process communication method and a process communication device. The process communication method comprises the following steps: an original process serializes data sent to a target process into a memory space segment of a virtual address space; and the original process sends a data receiving message to the target process, wherein the data receiving message carries the address information of the memory space segment and the process identification of the original process. According to the process communication method and the process communication device, the execution accuracy, the execution efficiency and the communication efficiency of the process can be improved.

The invention discloses a guidance system for vessel harboring, which comprises a space segment, a ground segment and an application segment, wherein the space segment comprises a navigation and location satellite, a mobile communication satellite and a telemetering remote sensing satellite in the stratosphere; the ground segment comprises a ground gateway station and a command center system; theapplication segment is a vessel terminal system; and location information, speed information and front channel information of the vessel obtained by three kinds of satellites during navigation are sent to the command center system through the ground gateway station, and navigation conditions, berth information and available berth information of the vessel are obtained through analysis. When the vessel sends a request of harboring to the command center system, the command center system sends guiding orders to the harboring vessel through the mobile communication satellite immediately, the harboring vessel is guided to berth, and the computer graphics (CG) technology is supplemented to master harbor berthing conditions, monitor anchoring and line mooring conditions of the vessel after berthing, and send safety warning information.

The invention relates to the field of satellite communication technologies and provides a binary diversity single-carrier transmission method based on a self-adaptive cyclic prefix. The method comprises the following steps that (1) a space segment provides information service forwarded based on processing through two co-orbital satellites, and a satellite receiver at an earth segment can synchronously receive signals of the two satellites to obtain space diversity gain; (2) inter-frame signal interference of a receiving end, which is brought by random perturbation of the satellites, is effectively resisted by utilizing a single-carrier transmission mechanism based on the cyclic prefix; (3) the satellite receiver carries out balancing and subsequent signal processing on the received signals, a specific statistical parameter is taken as an index, and the current length performance of the cyclic prefix is broadcasted to a satellite transmitting end in a manner of 1 bit; and (4) the satellite transmitting end adjusts the length of the cyclic prefix at the appointed step length according to feedback information. According to the method, when the satellite altitude is inaccurately known, lower complexity, low-speed feedback expenditure and higher transmission efficiency are achieved, and the signal diversity gain brought by binary transmission is obtained.

A device for retaining a mercury source in the discharge space of a low-pressure discharge lamp is disclosed. The mercury source retaining device comprises a holder, which has an inner space communicating with the discharge space and a receiver opening for receiving a mercury source. The retaining device further comprises resilient clamping means for clamping the holder in a tubular space segment of the discharge space and resilient retaining means at least partially blocking the receiver opening. The resilient retaining means are adapted for allowing a passage of the mercury source in a direction towards the inner space of the holder, but block the movement of the mercury source through the receiver opening in a direction out of the holder.

The invention relates to a method for quickly querying mass vehicle passing records within a time-space range on the basis of key value cloud storage. The method comprises the steps of constructing a time and space segment point key value index table, constructing a time and space segment tree key value index table and constructing a time and space segment tree upgrading and deleting key value index table. By adopting the method, the quick vehicle passing record query efficiency based on a time-space single point is greatly improved by introducing the time and space segment point index table; the quick vehicle passing record query efficiency based on the time-space range is greatly improved by introducing the time and space segment tree index table; by introducing the time and space segment tree updating index table, the time and space segment index table can be dynamically reconstructed, and possibility is provided for supporting real-time querying of mass vehicle passing records; by introducing a key value cloud storage database to preserve the index tables and utilizing a Hadoop cloud platform to generate the index tables, the index construction and maintenance time is greatly shortened, and the query processing performance is improved.