摘要:
A transmission wireless communications system includes: a transmit end, where the transmit end includes a transmit module having at least two antenna units, the transmit module transmits M narrow beams with different spatial directions according to a quality of service (QoS) requirement, and switches a transmit mode according to a preset switching rule, and a set of the spatial directions of the M narrow beams forms a transmit mode; and a receive end, where the receive end includes a receive module having at least two antenna units, the receive module receives N beams according to the QoS, a transmission channel is formed between the M narrow beams of the transmit end and the N beams of the receive end, and the receive end calculates transmission channel quality in different transmit modes, searches for a transmit mode that meets the QoS requirement, and feeds back the transmit mode to the transmit end, or feeds back a transmit mode with optimal channel quality to the transmit end if transmission channel quality corresponding to all transmit modes is traversed but no transmit mode that meets the QoS requirement is found. Both M and N are integers greater than or equal to 1.
摘要:
A multicast MPLS networks node in network communication field and a method and a system for fault localization are provided. The method includes a step that a leaf node judges the connectivity of a multicast path; a root node generates a fault localization message to perform fault localization for a fault branch after learning the branch where the fault is located in accordance with the judgment result of the leaf node. An embodiment of the present invention further provides a fault localization system for Multicast MPLS networks, which includes a connectivity checking module, a root node learning module, a node reply module and a fault localization module. The technical solution in the embodiment of the present invention restrains unnecessary message, reduces redundant information, and improves network efficiency by carrying the information of the fault branch in the fault localization message to perform fault localization only for the fault branch.
摘要:
This application provides a non-line-of-sight object imaging method and an electronic device, and belongs to the field of sensor technologies. The electronic device includes a first component and a second component. The method includes: detecting a trigger signal; in response to the trigger signal, obtaining first data collected by the first component, and obtaining second data collected by the second component, where the first data includes an electromagnetic signal collected by the first component, and the second data includes image information collected by the second component and/or movement information of the electronic device; and matching the first data and the second data, and generating an electromagnetic image of a non-line-of-sight object based on a matching result. The method provided in this application may be applied to, but is not limited to, a portable device such as a mobile phone or a mobile device such as a vehicle, for example, may be applied to target detection and tracking in autonomous driving. In addition, due to movement of the first component, a wide beam scanning range can be implemented. Therefore, imaging of the non-line-of-sight object in a plurality of application scenarios may be further implemented by using a small-sized portable device.
摘要:
The present invention discloses a microwave communication method and device to implement a physical layer-based microwave communication mechanism, so as to ensure effective data transmission. In the method, each frame of a transmitted or received microwave signal includes at least one frame header part and at least one load part, where the frame header part includes a preamble sequence, and the load part includes pilots and information payloads that are alternately distributed. In this way, the microwave signal carries synchronization information and load information, which implements physical layer-based microwave communication between devices, and ensures effective transmission of microwave data.
摘要:
A protection method in the packet transport network is provided by the embodiment of the invention. A protection path for the service data flow bearing on the shared protection ring is set up in the method, wherein the protection path includes a loopback protection path and a source routing protection path. Firstly, a first service data flow is sent through the loopback protection path. Then a service data flow node stops sending a second service data flow following the first service data flow to the loopback protection path, and caches the second service data flow. When the first service data flow completely passes the service data flow node again, the cached second service data flow is switched from the loopback protection path to the source routing protection path. A relevant system and device are also provided by the embodiment of the invention. The invention can solve the disordering problem generated when the combination protection scheme of the loopback way and the source routing way is applied in the packet transport network.
摘要:
A method, a system and an apparatus for allocating label in multicast service in multicast field, the method sets master controller in network, central management of label space; The master controller allocates label to the multicast service according to the request of the multicast service source, to assure that the unicast and multicast use different labels, so that it resolves the label collision of unicast and multicast, also resolves the label collision of multicast and multicast, and the master controller may query label for the multicast member. The label allocation apparatus includes: the message interactive unit, the message maintenance unit, the label allocation unit.
摘要:
A protection method in a packet transport network is provided. A protection path is established for a service data flow borne on a shared protection ring in the method, where the protection path includes a wrapping protection path and a steering protection path. Firstly, a first service data flow is sent through the wrapping protection path. Then, a service data flow node stops sending a second service data flow subsequent to the first service data flow to the wrapping protection path, and buffers the second service data flow. When the first service data flow completely passes by the service data flow node again, the buffered second service data flow is switched from the wrapping protection path to the steering protection path. A corresponding device and a corresponding system are also provided. Therefore, a disordering problem that occurs when a combination protection solution of the wrapping manner and the steering manner is applied in the packet transport network is solved.
摘要:
Embodiments of this application disclose a communication method and an apparatus thereof, to implement data communication between a first communication apparatus and a second communication apparatus, so that spectrum resource utilization can be improved. The method in embodiments of this application includes: The first communication apparatus determines a first sensing signal and a second sensing signal; and the first communication apparatus determines a third sensing signal, where the third sensing signal is obtained based on a first data signal and the first sensing signal, the first data signal is a data signal to be sent by the first communication apparatus to the second communication apparatus, and a first frequency difference between a frequency of the second sensing signal and a frequency of the third sensing signal is a preset threshold; and the first communication apparatus sends the second sensing signal and the third sensing signal.