74results about How to "Reduce delivery delay" patented technology

The invention discloses a space delay tolerant network congestion control method based on QoS. The method comprises the following steps: S1, adding contact congestion level information with a remaining node storage space and a contact remaining available capacity as judgment reference in a contact information format; S2, judging the contact congestion level according to the contact remaining available capacity and the remaining node storage space, and sending a congestion information notification to other nodes; S3, updating the contact congestion level in a contact plan by a node receiving the congestion information notification, calculating an optimal path congestion level by a node requiring a forwarding beam, and forwarding the beams of all priorities in the case of no congestion; forwarding the beams with high priorities and middle priorities in the case of slight congestion; forwarding the beams with high priorities in the case of serious congestion; and in the case of complete congestion, if the judgment reference is the contact remaining available capacity, forwarding the beams with high priorities, and if the judgment reference is the remaining node storage space, forwarding the beams via a secondary optimal path. By adopting the space delay tolerant network congestion control method disclosed by the invention, in the case of network congestion, the data transmission rate is improved, and the transmission delay is shortened.

According to the present invention, vehicle drive devices (1, 2) have: an output shaft (14) connected to an engine (10) started up by a starter (12); an input shaft (22) connected to a vehicle wheel (90); an electric motor (30) for generating rotational torque of the vehicle wheel (90); and a hydraulic clutch (20) for connecting the input shaft (22) and the output shaft (14) when in an engaged state and disconnecting the output shaft (14) from the input shaft (22) when in a disengaged state. The hydraulic clutch (20) is a normally open type of clutch that forms the engaged state by being supplied with oil. A device (70) for controlling the vehicle drive devices (1, 2) begins to supply oil to the hydraulic clutch (20) before the rotating speed of the engine (10) reaches the rotating speed of the input shaft (22) when the startup of the engine (10) is initiated by the starter (12) while the hydraulic clutch (20) is in the disengaged state and the engine (10) has stopped, and while either the input shaft (22) is being rotated by the electric motor (30) or the input shaft (22) is being rotated by inertia travel.

The invention discloses a delay tolerant and disruption tolerant network (DTN) opportunity prediction routing method based on a timetable. On the base of the research on the routing mechanism of the existing delay tolerant and disruption tolerant network, an aggregated-unfolded mobile terminal, an opportunity prediction DTN routing algorithm based on a timetable and a cache management strategy are designed in view of the characteristics of special battlefield environments and mobile motorcades, physical positions of nodes and a meeting probability of the nodes can be predicted according to the moving timetables of the mobile nodes, then an optimized information forwarding decision is made, so that smooth network communication can be kept on the condition of high delay and frequent link interruption in the battlefield environments, the information transmission reliability and the data throughput are improved, and the delivery delay is shortened, therefore the survivability of a DTN communication network in the battlefield environments is enhanced.

A base station, a relay station and a backhaul control communication thereof are provided. A wireless communication system comprises the relay station, a base station, and a core network. The relay station is wirelessly connected to the base station, while the base station is wiredly connected to the core network. The relay station comprises a processing unit and a transceiver. The processing unit is configured to create a radio link having a control plane connection between the relay station and the base station and create a backhaul link between the relay station and the base station by the control plane connection of the radio link. The transceiver is configured to transmit a backhaul control message to the core network via the backhaul link.

The invention discloses an information forwarding method in a resource-constrained opportunity network based on node excitation, aiming at solving the problems of node blind cooperation and the like of the existing node excitation which fails to take occupation and energy consumption of node cache in the network into consideration. According to the information forwarding method disclosed by the invention, a pricing foundation is set by taking idle cache space, rest energy and owned monetary value on the node as well as size and rest survival time of the message into comprehensive consideration. Hereby, the node, as a rational entity, is scientifically described, and with variation of an environment attribution and variation of cooperative willingness, and depending on an instinct of seeking for owned benefit maximization of the node, rational excitation node cooperation is achieved. Furthermore, when the rest energy of the node is rare, the network service life of the node can be prolonged; and when the idle cache space of the node is comparatively small, the method is favorable for relieving the network jamming, so that the energy consumption can be effectively reduced, and the network average transmission delay and delivery rate can be improved.

The invention discloses a low dropout regulator, which comprises an error amplifier, a buffer circuit, a P-channel metal oxide semiconductor (PMOS) regulation transistor, an N-channel metal oxide semiconductor (NMOS) push-pull tube, a voltage division feedback circuit, a compensation circuit and an output circuit, wherein the gate of the PMOS regulation transistor is connected with the output end of the buffer circuit, the source of the PMOS regulation transistor is connected with power voltage, and the drain of the PMOS regulation transistor is used as the output end of the low dropout regulator; the gate of the NMOS push-pull tube is connected with the output end of the error amplifier, the drain of the NMOS push-pull tube is connected with the drain of the PMOS regulation transistor, and the source of the NMOS push-pull tube is grounded; and the error amplifier, the compensation circuit, the buffer circuit, the PMOS regulation transistor, the voltage division feedback circuit and an output circuit form a main control loop, and the error amplifier, the compensation circuit, the NMOS push-pull tube, the voltage division feedback circuit and the output circuit form an auxiliary control loop. According to the low dropout regulator, the transient response of the regulator can be quickened, and the accuracy of output voltage can be improved.