Huawei Technologies Co., Limited

Chunrong Li

Yunlei Qi

Yongjian Hu

Jun Hu

Yuanlong Jiang

Weiping Xu

Jingfeng Chen

Guodao Chen

Hongliang Sun

Dajun Ma

This application provides a communication method and an optical module. The method includes: A first optical module determines a first delay. The first optical module sends the first delay to an interface chip. According to the communication method and the optical module that are provided in this application, a delay in the optical module can be reported to the interface chip, so as to improve precision of time synchronization between a master clock and a slave clock, thereby further improving clock precision of a network device.

Communication method and optical module

This application provides an isolation and recovery method and related network device for a case when one or more physical layer apparatuses (PHYs) in a flexible Ethernet group (FlexE group) are faulty. In the method, if a network device determines that a first overhead block corresponding to each current available PHY is stored in a corresponding memory, the network device determines that a FlexE group meets a PHY alignment condition, and starts to simultaneously read cached data from all memories. Therefore, there is no need to insert local fault LF code blocks to all clients, and there is no need to recreate a group. This effectively reduces the impact of a faulty PHY on client services carried by a normal PHY.

Flexible ethernet communication method and network device

A device determines a first latency value of a first data flow from a first physical port of the device to a second physical port of the device and a second latency value of a second data flow from the second physical port to the first physical port, where the first latency value is less than the second latency value. The device determines a first target latency value based on the first latency value and the second latency value. The device adjusts a latency value of the first data flow to the first target latency value.

Latency compensation method and device

A multicast packet transmission method, apparatus, and system, where the method is applied to a multicast ring network and the method includes receiving, by a first network node in the multicast ring network through a first path in a clockwise direction of the multicast ring network, a first multicast packet from a second network node in the multicast ring network, receiving, by the first network node through a second path in an anticlockwise direction of the multicast ring network, a second multicast packet from the second network node, where a payload of the first multicast packet is the same as a payload of the second multicast packet, and forwarding, by the first network node, the first multicast packet or the second multicast packet to at least one multicast destination device connected to the first network node.

Multicast packet transmission method, apparatus, and system

A packet processing method includes: obtaining, at a Medium Access Control (MAC) layer, a first fragmented data frame included in a first data frame; buffering the first fragmented data frame into a first queue; obtaining, at the MAC layer, a second fragmented data frame included in a second data frame; buffering the second fragmented data frame into a second queue; sending the first fragmented data frame to a forwarding processing module; obtaining first forwarding information using the forwarding processing module; sending the second fragmented data frame to the forwarding processing module after sending the first fragmented data frame to the forwarding processing module; and obtaining second forwarding information.

Packet processing based on latency sensitivity

A communications network delay variation smoothing method, an apparatus, and a system are disclosed. The method includes: clearing, by a local device, a forward delay threshold and a reverse delay threshold when an initialization time starts; and when determining that a maximum value between a real-time forward delay value corresponding to a current service flow fragment and a reverse delay threshold corresponding to the current service flow fragment is greater than a current value of the forward delay threshold, replacing the current value of the forward delay threshold with the maximum value. In this way, after the initialization ends, a delay threshold after the initialization ends is determined and is applied to delay compensation, thereby significantly reducing a bi-directional asymmetric delay variation, and avoiding a problem of abnormal user communication that is caused when the variation exceeds a limit.

Communications network delay variation smoothing method, apparatus, and system

A method and an apparatus for processing data of multiple rates, where the method includes receiving, by a data processing apparatus, first data whose transmission rate is a first rate and second data whose transmission rate is a second rate, obtaining, by the data processing apparatus, N1 pieces of third data and N2 pieces of fourth data according to the first data, obtaining, by the data processing apparatus, M1 pieces of fifth data and M2 pieces of sixth data according to the second data, obtaining, by the data processing apparatus, serial seventh data according to the N1 pieces of third data, the N2 pieces of fourth data, and a first modulation scheme, and obtaining, by the data processing apparatus, serial eighth data according to the M1 pieces of fifth data, the M2 pieces of sixth data, and a second modulation scheme.

Method and apparatus for processing data of multiple rates

The present invention discloses a method for AU-3 circuit emulation, including: converting frame data from an administrative unit AU-3 frame format into a tributary unit TU-3 frame format; mapping the frame data in the TU-3 frame format into a virtual container VC4 to obtain the frame data in a VC4 frame format; and emulating the frame data in the VC4 frame format. In embodiments of the present invention, frame data is converted from an AU-3 frame format into a TU-3 frame format, and the frame data in the TU-3 frame format is mapped into a virtual container VC4 to obtain frame data in the VC4 frame format. In this way, the frame data in the VC4 frame format is emulated, a requirement of transparently transmitting AU pointers in the present network is fulfilled, that is, the requirement of emulating and transparently transmitting the content of an entire AU is fulfilled.

Method and apparatus for administrative unit-3 circuit emulation

The present invention relates to the field of communications technologies and discloses a method, an apparatus and a system for transmitting SDH/Sonet section overhead bytes, which reduce a burden of an intermediate node of a PTN network in a process of transmitting DCC bytes in the PTN network. In the present invention, a pseudo wire is established between a local end node and a peer end node. The local end node separates target overhead bytes from section overhead bytes of an SDH/Sonet frame, where the target overhead bytes include DCC bytes; packages the target overhead bytes to obtain a dedicated overhead packet; and sends the dedicated overhead packet to the peer end node, where the dedicated overhead packet is transmitted as a service packet of the pseudo wire. The embodiments of the present invention are mainly applied to a process of transmitting an SDH/Sonet service in the PTN network.

Growing community of inventors

Shenzhen, China

Chunrong Li