公开(公告)号：US20190268257A1

公开(公告)日：2019-08-29

申请号：US16413186

申请日：2019-05-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiquan Zhang ,  Jianmin Song ,  Jiahong Wei ,  Lin Liu

IPC: H04L12/727 ,  H04L12/741 ,  H04L12/26

Abstract: A physical layer chip of a first physical port of a network device receives a packet and sends a first time stamp and the packet to a Media Access Control (MAC) chip of the first physical port. The MAC chip of the first physical port adds the first time stamp to the packet and sends the packet. A MAC chip of a second physical port receives the packet, extracts the first time stamp of the packet, and sends the packet to a physical layer chip of the second physical port. The MAC chip of the second physical port receives a second time stamp of the packet. The network device calculates a processing delay for the packet. The processing delay is a value obtained by subtracting the first time stamp from the second time stamp.

公开(公告)号：US10771374B2

公开(公告)日：2020-09-08

申请号：US16413186

申请日：2019-05-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiquan Zhang ,  Jianmin Song ,  Jiahong Wei ,  Lin Liu

IPC: H04L12/727 ,  H04L12/26 ,  H04L12/741

Abstract: A physical layer chip of a first physical port of a network device receives a packet and sends a first time stamp and the packet to a Media Access Control (MAC) chip of the first physical port. The MAC chip of the first physical port adds the first time stamp to the packet and sends the packet. A MAC chip of a second physical port receives the packet, extracts the first time stamp of the packet, and sends the packet to a physical layer chip of the second physical port. The MAC chip of the second physical port receives a second time stamp of the packet. The network device calculates a processing delay for the packet. The processing delay is a value obtained by subtracting the first time stamp from the second time stamp.

公开(公告)号：US11245605B2

公开(公告)日：2022-02-08

申请号：US16795108

申请日：2020-02-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiquan Zhang ,  Jianmin Song ,  Jiahong Wei ,  Hong Xu

IPC: H04L12/26 ,  H04L12/727 ,  H04L12/707

Abstract: This application provides a latency-based transmission path control method, an apparatus, and a system. Device latencies of network node devices on an active transmission path, device latencies of network node devices on a standby transmission path, latencies of links between the network node devices on the active transmission path, and latencies of links between the network node devices on the active transmission path are obtained, and calculation is performed based on the respective device latencies and link latencies to obtain an active transmission path latency and a standby transmission path latency. Then, based on a latency-based switching mechanism, when the active transmission path latency is greater than a switching threshold and the standby transmission path latency is less than the switching threshold, an active-to-standby path switching command is generated.

公开(公告)号：US11050649B2

公开(公告)日：2021-06-29

申请号：US16432647

申请日：2019-06-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiquan Zhang ,  Jianmin Song ,  Jiahong Wei

IPC: H04L12/26 ,  H04L12/851

Abstract: A method of delay measurement of a network node device is disclosed. The method includes obtaining a node delay value of a current packet when a preset time period starts. The method further includes determining, based on M+1 boundary values of preset M delay intervals, a delay interval in which the node delay value is located, and adding 1 to a value of a delay segment counter corresponding to the delay interval in which the node delay value is located, where M>1, M is a positive integer. The method further includes obtaining a node delay value of a next packet until the preset time period ends. The method further includes determining a cumulative probability Pacc.j that is greater than or equal to a target probability, and obtaining, as a delay threshold, a node delay value having the target probability.