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1.发明公开
公开(公告)号：EP4024778A1
公开(公告)日：2022-07-06
申请号：EP20870261.3
申请日：2020-09-04
发明人： ZHANG, Jiayi , WANG, Tongtong , WANG, Xinyuan , JIN, Minwei , CHEN, Lihao
IPC分类号： H04L12/70
摘要： This application provides a method, a device, and a system for determining a required bandwidth for a data stream. The method includes: obtaining, by a control device, a service requirement latency of transmitting a data stream from a first network device to a second network device; obtaining, by the control device, a network device transmission latency on a forwarding path and a link transmission latency on the forwarding path; and determining, by the control device based on the service requirement latency of the data stream and the network device transmission latency and the link transmission latency on the path for forwarding the data stream, a required bandwidth for transmitting the data stream. The foregoing method may be used to guide network resource deployment for a data stream that has a latency requirement, to ensure a low latency for data stream transmission.
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公开(公告)号：EP3958509A1
公开(公告)日：2022-02-23
申请号：EP20810380.4
申请日：2020-05-09
发明人： CHEN, Lihao
摘要： This application discloses a method, an apparatus, and a system for communication between controllers in TSN. A specific solution includes: A first controller receives a first packet that is sent by a second controller and that includes an identifier of a TSN domain to which the second controller belongs. The first controller determines, based on the TSN domain identifier, that the first controller and the second controller belong to a same TSN domain. The first controller sends, to the second controller, a second packet that carries user information. According to the foregoing method, communication and exchange between the controllers may be implemented, so that the controllers cooperatively configure a network device in the TSN.
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公开(公告)号：EP4156614A1
公开(公告)日：2023-03-29
申请号：EP21825044.7
申请日：2021-06-18
发明人： CHEN, Lihao , ZHANG, Jiayi , GAO, Tao , WANG, Tongtong , LI, Dongchuan
IPC分类号： H04L12/865
摘要： Embodiments of this application disclose a method and an apparatus for queue scheduling, to reduce a network latency in a packet transmission process. The method includes: A first device obtains a first packet balance when scheduling a first queue, where the first packet balance indicates a volume of packets that can be dequeued from the first queue; and the first device schedules a second queue based on the first packet balance.
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公开(公告)号：EP4037270A1
公开(公告)日：2022-08-03
申请号：EP20885686.4
申请日：2020-10-09
发明人： CHEN, Lihao , ZHANG, Jiayi , WANG, Tongtong
IPC分类号： H04L12/841
摘要： Embodiments of this application disclose a service traffic adjustment method and apparatus, to reduce a network resource waste, and improve network usage efficiency. The method includes: A first controller obtains a first limit value of a traffic parameter and a second limit value of the traffic parameter, where the traffic parameter is a parameter of traffic corresponding to a service flow. The first controller obtains a target value of the traffic parameter based on the first limit value of the traffic parameter, the second limit value of the traffic parameter, and configuration information of a forwarding device through which the service flow passes. The target value of the traffic parameter meets a delay requirement of the service flow, the target value falls within a range determined based on the first limit value of the traffic parameter and the second limit value of the traffic parameter, and the first limit value is not equal to the second limit value. The first controller sends the target value of the traffic parameter, where the target value is used to adjust the traffic of the service flow sent by a transmit end.
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公开(公告)号：EP4030646A1
公开(公告)日：2022-07-20
申请号：EP20871409.7
申请日：2020-09-17
发明人： CHEN, Lihao , WANG, Tongtong
IPC分类号： H04J3/06
摘要： Disclosed are a packet forwarding method, a device, and a system. The method includes: A first network device receives a first message sent by a second network device via a second egress port of the second network device, where the first message is used to measure a phase difference, and the phase difference is a phase difference between a switching time of one of a plurality of first buffers of a first egress port of the first network device and a switching time of one of a plurality of second buffers of the second egress port of the second network device with a link delay taken into consideration; the first network device determines the phase difference based on the first message; and then the first network device schedules, based on the phase difference, a second data packet sent via the first egress port. In this way, the first network device and the second network device implement queuing and forwarding of data packets without time synchronization.
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公开(公告)号：EP4024792A1
公开(公告)日：2022-07-06
申请号：EP20865261.0
申请日：2020-05-30
发明人： CHEN, Lihao , WANG, Tongtong
IPC分类号： H04L12/863
摘要： This application discloses a packet forwarding method and apparatus, a system, a device, and a storage medium. The method is applied to an in-vehicle network and includes: obtaining, by a network device, a plurality of packets carried on an Ethernet link in the in-vehicle network, where the plurality of packets are packets of one or more application categories; determining a traffic class of each packet based on an application category of each packet in the plurality of packets; adding each packet to a forwarding queue corresponding to the traffic class based on the traffic class of each packet; and scheduling and forwarding packets in all forwarding queues based on an absolute priority and a traffic class corresponding to each forwarding queue, and using a shaper in a forwarding queue of at least one traffic class in intermediate traffic classes in the scheduling and forwarding process. For the plurality of packets carried on the Ethernet link, a transmission requirement of the packets is met, so that the scheduling and forwarding have better performance. Therefore, the method is applicable to an Ethernet-based in-vehicle network architecture. The use of the shaper ensures a bounded latency.
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公开(公告)号：EP3633937A1
公开(公告)日：2020-04-08
申请号：EP18822978.5
申请日：2018-06-07
发明人： CHEN, Lihao , ZHANG, Mingui
IPC分类号： H04L12/803 , H04L12/819 , H04L12/865 , H04L12/873
摘要： This application provides a packet transmission method. The method is applied to a network including a first link and a second link, and the method includes: determining, by a transmit end based on a length of a packet, whether a quantity of tokens in a first token bucket meets a requirement for transmitting the packet, where a token injection rate of the first token bucket is set based on bandwidth of the first link; when determining that the quantity of tokens in the first token bucket meets the requirement for transmitting the packet, obtaining a quantity of tokens required for transmitting the packet, and transmitting the packet by using the first link; when determining that the quantity of tokens in the first token bucket does not meet the requirement for transmitting the packet, determining whether the second link is congested; and when determining that the second link is not in a congested state, transmitting, by the transmit end, the packet by using the second link. In the foregoing method, traffic can be properly offloaded, thereby ensuring that link bandwidth is fully used.
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公开(公告)号：EP4075732A1
公开(公告)日：2022-10-19
申请号：EP20916041.5
申请日：2020-09-17
发明人： CHEN, Lihao , ZHANG, Jiayi , LI, Lei , CHEN, Shuang
IPC分类号： H04L12/24
摘要： This application discloses a service level configuration method and apparatus, and belongs to the field of communications network technologies. According to the method, a target service level used by a first forwarding node to forward a data flow is directly determined based on a transmission parameter of the data flow and service level information of the first forwarding node, and service level configuration is performed on the first forwarding node. Because a transmission parameter of the target service level of the first forwarding node and the transmission parameter of the data flow meet a first target condition, if the first target condition is a delay requirement required by a special service and the first forwarding node transmits the data flow by using the target service level, transmission of the data flow may meet the delay requirement required by the special service.
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公开(公告)号：EP3893457A1
公开(公告)日：2021-10-13
申请号：EP19908885.7
申请日：2019-01-07
发明人： FINN, Norman , WANG, Tongtong , CHEN, Lihao
IPC分类号： H04L29/06
摘要： This application discloses a data transmission method and apparatus, relates to computer network technologies, and is used to prevent a network device from forwarding an Ethernet frame in which an error occurs. A specific solution is as follows: A network device receives an Ethernet frame, and checks a destination MAC address based on a first CRC code, to determine whether an error occurs in the destination MAC address. If the network device determines that no error occurs in the destination MAC address, the network device forwards the Ethernet frame based on the destination MAC address. The Ethernet frame includes the destination MAC address, the first CRC code, and a payload, a parameter of the first CRC code includes the destination MAC address, and the parameter of the first CRC code does not include the payload. The embodiments of this application are used in a process of forwarding the Ethernet frame.
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公开(公告)号：EP3840311A1
公开(公告)日：2021-06-23
申请号：EP19856560.8
申请日：2019-07-01
发明人： CHEN, Lihao
IPC分类号： H04L12/801
摘要： This application discloses a traffic scheduling method, a device, and a system. The method includes: determining, by a first network device, first traffic scheduling information and a transmission path of a first data stream based on a first talker attribute message received from a talker device and a listener attribute message received from a listener device; and then sending, by the first network device, a first traffic scheduling message to a network device on the transmission path. The first traffic scheduling message includes the first traffic scheduling information. The first traffic scheduling information indicates the network device on the transmission path to generate a gate control list. The gate control list indicates the network device on the transmission path to control, based on the gate control list, a state of a port used to transmit the first data stream.
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