Abstract: This application discloses a communications method and related communications apparatus and system. The method includes recovering, by a first node, when detecting that a first packet is lost, the first packet according to a local recovery mechanism. The first packet is a packet obtained based on a packet sent by at least one first terminal to at least one second terminal, and the first node is a node on a network path between each first terminal and a second terminal communicating with the first terminal. The method further includes adding a first identification information related to local recovery, and sending the first packet. This application can reduce a transmission delay and improve transmission efficiency.

Abstract: An anechoic chamber and a construction method thereof are provided, the anechoic chamber includes a top surface, being a polygon; trapezoid surfaces, corresponding to edges of top surface, upper edge lengths of trapezoid surface being equal to edge lengths of top surface, trapezoid surfaces being connected to edges of top surface through the upper edges, the trapezoid surfaces being sequentially connected along a circumferential direction of top surface, and being at angle to the top surface; rectangular surfaces, corresponding to the trapezoid surfaces, upper edge lengths of rectangular surface being equal to lower edge lengths of trapezoid surface, rectangular surfaces being connected to the trapezoid surfaces through the upper edges, the rectangular surfaces being sequentially connected along a circumferential direction of the lower edges of trapezoid surfaces, and being perpendicular to the top surface; and an absorbing material, disposed on the top surface, the trapezoid surfaces and the rectangular surf

Abstract: A system and method for packet processing, the method being applied to a first network device and including sending a first packet to a second network device, where a control packet header of the first packet includes a first number, and the first number indicates a number of a packet that carries the first number and that is between the first network device and the second network device, and receiving a first acknowledgement packet from the second network device, where the first acknowledgement packet comprises an indication indicating whether the second network device receives the first packet.

Abstract: A prop special effect display method includes controlling a first virtual object in a virtual scene to launch a projectile associated with a virtual prop in response to receiving a launching operation for the virtual prop. The method further includes, in response to the projectile hitting a target object in the virtual scene, determining a scaling ratio of a special effect of the virtual prop based on a distance between the first virtual object and the target object. The scaling ratio of the special effect is positively correlated with the distance, and the special effect includes at least one of a video or audio output and the scaling ratio comprises a display size or a volume. The method further includes playing the special effect of the virtual prop based on the scaling ratio of the special effect.

Abstract: In a method for processing a virtual effect in a virtual scene, the virtual effect is generated in the virtual scene. The virtual effect is configured to change an attribute value of a virtual object that is located within a functional range of the virtual effect. Based on positional relationships between a plurality of body parts of the virtual object and the virtual effect in the virtual scene, a sub-attribute change value for each of the plurality of body parts of the virtual object that is affected by the virtual effect is determined. A change to the attribute value of the virtual object is determined based on the sub-attribute change value of each of the plurality of body parts of the virtual object that is affected by the virtual effect.

Abstract: A packet transmission method and an electronic device. In the packet transmission method, a response packet request field is set in a service packet, and a sending device can set a value of a response packet request field in a sent service packet. When the sending device needs a receiving device to send a response packet, the sending device changes a value of a response packet request field in a subsequently sent service packet, to trigger the receiving device to send the response packet to the sending device.

Abstract: An apparatus comprises: a memory; and a processor coupled to the memory and configured to: perform a random number generation; generate a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; and generate, using the HID, an initial message requesting a local address. A method comprises: performing a random number generation; generating a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; generating, using the HID, an initial message requesting a local address; and transmitting the initial message.

Abstract: This application provides a sequence number synchronization method. The specific method includes: A first network device sends a data packet including a first synchronization indication to a second network device, where the first synchronization indication is used to indicate the second network device and the first network device to perform a sequence number synchronization operation. The first network device receives a response packet sent by the second network device, where the response packet includes a second synchronization indication, and the second synchronization indication is used to indicate that the second network device has received the packet including the first synchronization indication.

Abstract: This application discloses a communications method and related communications apparatus and system. The method includes recovering, by a first node, when detecting that a first packet is lost, the first packet according to a local recovery mechanism. The first packet is a packet obtained based on a packet sent by at least one first terminal to at least one second terminal, and the first node is a node on a network path between each first terminal and a second terminal communicating with the first terminal. The method further includes adding a first identification information related to local recovery, and sending the first packet. This application can reduce a transmission delay and improve transmission efficiency.

Abstract: A skid mounted device for upper-spreading internal diffusion vertical plug flow photocatalytic wastewater treatment includes internal diffusion vertical plug flow photocatalytic reaction tank groups and a skid base. The internal diffusion vertical plug flow photocatalytic reaction tank groups are arranged on the skid base. The internal diffusion vertical plug flow photocatalytic reaction tank groups are connected to each other in series, in parallel, or in series-parallel. Each internal diffusion vertical plug flow photocatalytic reaction tank group consists of two or more photocatalytic reaction tanks connected in series, in parallel, or in series-parallel. The wastewater pipes connected to the photocatalytic reaction tanks in each internal diffusion vertical plug flow photocatalytic reaction tank group are mounted above the photocatalytic reaction tanks.

Abstract: A system and method for packet processing, the method being applied to a first network device and including sending a first packet to a second network device, where a control packet header of the first packet includes a first number, and the first number indicates a number of a packet that carries the first number and that is between the first network device and the second network device, and receiving a first acknowledgement packet from the second network device, where the first acknowledgement packet comprises an indication indicating whether the second network device receives the first packet.

Abstract: An apparatus comprises: a memory; and a processor coupled to the memory and configured to: perform a random number generation; generate a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; and generate, using the HID, an initial message requesting a local address. A method comprises: performing a random number generation; generating a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; generating, using the HID, an initial message requesting a local address; and transmitting the initial message.

Abstract: An apparatus comprises: a memory; and a processor coupled to the memory and configured to: perform a random number generation; generate a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; and generate, using the HID, an initial message requesting a local address. A method comprises: performing a random number generation; generating a host identifier (HID) based on the random number generation, wherein the HID is substantially unique within a local network; generating, using the HID, an initial message requesting a local address; and transmitting the initial message.

Abstract: The present disclosure provide a packet processing method, a related apparatus, and an NVO3 network system. A first NVE receives a first packet sent by a first CE, where the first packet includes a MAC address of the first CE and a VLAN ID; the first NVE determines a VNI of the first CE according to an inbound interface of the first packet and the VLAN ID; the first NVE performs NVO3 encapsulation on the first packet to obtain an NVO3 encapsulated first packet, where the NVO3 encapsulated first packet includes the VNI of the first CE, and a source IP address in an NVO3 header of the NVO3 encapsulated first packet is a first shared VTEP IP address shared by the first NVE and a second NVE; and the first NVE forwards the NVO3 encapsulated first packet to a remote NVE.

Abstract: An apparatus configured to provide active-active access to a transparent interconnection of lots of links (TRILL) campus. The apparatus includes a first access port associated with a first customer equipment (CE) and a second access port associated with a second CE. The first access port is configured to receive a frame from the first CE. The apparatus includes a processor configured to replicate the frame to generate a replicated frame, determine that a pseudo-nickname associated with the first access port and the pseudo-nickname associated with the second access port are the same, and determine that the first access port and the second access port are associated with different multi-chassis link aggregations (MC-LAGs). The apparatus also includes a transmitter configured to forward the replicated frame to the second CE using the second access port.

Abstract: A skid mounted device for upper-spreading internal diffusion vertical plug flow photocatalytic wastewater treatment includes internal diffusion vertical plug flow photocatalytic reaction tank groups and a skid base. The internal diffusion vertical plug flow photocatalytic reaction tank groups are arranged on the skid base. The internal diffusion vertical plug flow photocatalytic reaction tank groups are connected to each other in series, in parallel, or in series-parallel. Each internal diffusion vertical plug flow photocatalytic reaction tank group consists of two or more photocatalytic reaction tanks connected in series, in parallel, or in series-parallel. The wastewater pipes connected to the photocatalytic reaction tanks in each internal diffusion vertical plug flow photocatalytic reaction tank group are mounted above the photocatalytic reaction tanks.

Abstract: The present application provides a method and a device for clearing a MAC forwarding entry. The method includes: detecting, by a first RB, that a topology of a network accessed by a local terminal changes; and sending, by the first RB, a first packet to a second RB, so that the second RB clears a corresponding forwarding entry after receiving the first packet, where the second RB refers to an RB configured with at least one VLAN the same as that of the first RB.

Abstract: Embodiments provide a service instance mapping method, apparatus and system. The service instance mapping method includes: correlating a layer-2 service instance with a service access port of the service instance, and determining correspondence between the service access port and a service instance identifier. The method also includes mapping the service instance identifier to a service label of a packet.

Abstract: An apparatus configured to provide active-active access to a transparent interconnection of lots of links (TRILL) campus. The apparatus includes a first access port associated with a first customer equipment (CE) and a second access port associated with a second CE. The first access port is configured to receive a frame from the first CE. The apparatus includes a processor configured to replicate the frame to generate a replicated frame, determine that a pseudo-nickname associated with the first access port and the pseudo-nickname associated with the second access port are the same, and determine that the first access port and the second access port are associated with different multi-chassis link aggregations (MC-LAGs). The apparatus also includes a transmitter configured to forward the replicated frame to the second CE using the second access port.

Abstract: A method and an apparatus for forwarding a packet, where a first network virtualization edge (NVE) receives a first packet sent by a first tenant end system (TES), where a destination Internet Protocol (IP) address of the first packet is an IP address of a second TES, a destination media access control (MAC) address of the first packet is a gateway MAC address corresponding to the first NVE. The first NVE acquires an access virtual network identifier (VN ID) and a layer 3 virtual private network (VPN) instance identifier of the first TES, and searches a routing and forwarding table, to obtain an entry corresponding to the IP address of the second TES. Then the first NVE encapsulates the first packet into a network virtualization overlays (NVO3) packet according to the entry, and forwards the NVO3 packet to a second NVE to forward to the second TES.