Abstract: Embodiments of the present disclosure relate to a signal transmission method The signal receiving method includes: receiving a first transmit signal, where the first transmit signal includes a first polarized optical signal and a second polarized optical signal that are perpendicular to each other, where the first polarized optical signal is loaded with first data, the first transmit signal is an uplink signal, and the first data is uplink data, or, the first transmit signal is a downlink signal, and the first data is downlink data; splitting the first transmit signal into a first signal and a second signal according to power; separately rotating a first polarized optical signal and a second polarized optical signal of the second signal by 90 degrees; and performing coherent mixing on the rotated second signal and the first signal to obtain the first data.

Abstract: Embodiments of the present invention disclose a wireless network device, a wireless network system and a method of controlling selection of routings. The wireless network device includes: a memory configured to store routing latency information for routing from the wireless network device to other nodes in a network; a processor configured to determine transmission latency requirement of transmitting data packets from the wireless network device to a destination node according to transmission latency requirement information carried in the data packets after obtaining the data packets to be transmitted, query available routes from the wireless network device to the destination node, and the stored latency information corresponding to the available routes, select a route most approximate to the determined transmission latency requirement from the available routes according to a query result of the query module, and transmit the data packets.

Abstract: A passively Q-switched laser comprises a pump laser diode, a micro laser resonant cavity including a lasing medium and a saturable absorber, a filter and a photodiode. The lasing medium and saturable absorber are bonded together, and dielectric film is coated on the surfaces of the bonded body to form the laser resonant cavity. The filter reflects a portion of the Q-switched laser pulse beam. The photodiode can detect and convert the laser pulse to electric signal for triggering purpose.

Abstract: A passively Q-switched laser comprises a pump laser diode, a micro laser resonant cavity including a lasing medium and a saturable absorber, a filter and a photodiode. The lasing medium and saturable absorber are bonded together, and dielectric film is coated on the surfaces of the bonded body to form the laser resonant cavity. The filter reflects a portion of the Q-switched laser pulse beam. The photodiode can detect and convert the laser pulse to electric signal for triggering purpose.

Abstract: A method and an apparatus for generating a differential quadrature phase shift keying (DQPSK) code optical signal are provided. The method may includes splitting an optical signal to obtain two polarized optical signals, modulating and phase-shifting one of the two polarized optical signals to obtain a phase-shifted and polarized optical signal, and modulating the other of the two polarized optical signals to obtain another polarized and modulated optical signal. The phase-shifted and polarized optical signal may be combined with the other polarized and modulated optical signal to obtain a polarization multiplexed optical signal. The method may further include, polarizing the polarization multiplexed optical signal to obtain the DQPSK code optical signal. The apparatus may include a polarization beam splitter (PBS), modulators, a phase-shift controller, a polarization beam combiner (PBC), and a polarizer.

Abstract: Embodiments of the present invention disclose a wireless network device, a wireless network system and a method of controlling selection of routings. The wireless network device includes: a memory configured to store routing latency information for routing from the wireless network device to other nodes in a network; a processor configured to determine transmission latency requirement of transmitting data packets from the wireless network device to a destination node according to transmission latency requirement information carried in the data packets after obtaining the data packets to be transmitted, query available routes from the wireless network device to the destination node, and the stored latency information corresponding to the available routes, select a route most approximate to the determined transmission latency requirement from the available routes according to a query result of the query module, and transmit the data packets.

Abstract: A method for realizing route discovery in a network includes: classifying a level of a node in the network; receiving a route request packet from a node adjacent to the node; comparing a node level indicated by node level information contained in the received route request packet with the level of the node; updating, in a case where the level of the node is higher than the node level indicated by the node level information contained in the route request packet, the node level indicated by the node level information contained in the route request packet to be the level of the node; and forwarding the updated route request packet to other nodes adjacent to the node.

Abstract: A wireless communication network, a communication method and a node for the wireless communication network are disclosed. The wireless communication network includes a plurality of peer nodes communicating with each other through a control channel and a plurality of data channels. The communication method may include: transmitting available data channel information via a routing request signal; modifying available data channel information received by the source node or the other intermediate nodes, and transmits the modified available data channel information via a routing request signal; determining an agreed data channel for communication between the destination node and the source node or between the destination node and the intermediate node, according to the available data channel information transmitted from the source node or the intermediate node; and notifying an intermediate node as a previous hop and/or the source node of an identification of the agreed data channel via a routing response signal.

Abstract: A wireless communication network includes a plurality of peer nodes, the plurality of nodes communicating with each other through a control channel and a plurality of data channels, the communication method including: a source node in the plurality of nodes reserves a data channel used for transmitting data to a destination node in the plurality of nodes through the control channel; the source node and the destination node switch to the reserved data channel; the source node transmits the data to the destination node through the reserved data channel; and after the data transmission between the source node and the destination node is completed, the destination node sends a data transmitting success acknowledgement signal to the source node through the reserved data channel, and then both of the destination node and the source node switch to the control channel from the reserved data channel for operation.

Abstract: A method and an apparatus for generating a differential quadrature phase shift keying (DQPSK) code optical signal are provided. The method may includes splitting an optical signal to obtain two polarized optical signals, modulating and phase-shifting one of the two polarized optical signals to obtain a phase-shifted and polarized optical signal, and modulating the other of the two polarized optical signals to obtain another polarized and modulated optical signal. The phase-shifted and polarized optical signal may be combined with the other polarized and modulated optical signal to obtain a polarization multiplexed optical signal. The method may further include, polarizing the polarization multiplexed optical signal to obtain the DQPSK code optical signal. The apparatus may include a polarization beam splitter (PBS), modulators, a phase-shift controller, a polarization beam combiner (PBC), and a polarizer.

Abstract: A parser for parsing a text-coded protocol includes: a parsing rule storage module, configured to store a parsing rule for parsing a packet of the text-coded protocol; and a packet parsing module, implemented by a logic chip, configured to parse the packet according to the parsing rule stored in the parsing rule storage module, and output a parsing result. Compared with software-based parsers, the hardware-based parser provided by embodiments of the present invention improves parsing efficiency and reduces cost of the parser. In addition, the parser provided by embodiments of the present invention has a better generality.

Abstract: A method and an apparatus for string pattern matching and parsing based on ABNF syntax. The method includes: defining an instruction set suitable for describing a string pattern rule; designing a compiler capable of translating the protocol rule described in ABNF syntax into a protocol rule described with the instruction set and an object code; designing a hardware parser according to the characteristics of the instruction set, the parser comprising a module implemented by a special hardware for supporting the corresponding instruction, thereby realizing string pattern matching and parsing.

Abstract: A parser for parsing a text-coded protocol includes: a parsing rule storage module, configured to store a parsing rule for parsing a packet of the text-coded protocol; and a packet parsing module, implemented by a logic chip, configured to parse the packet according to the parsing rule stored in the parsing rule storage module, and output a parsing result. Compared with software-based parsers, the hardware-based parser provided by embodiments of the present invention improves parsing efficiency and reduces cost of the parser. In addition, the parser provided by embodiments of the present invention has a better generality.