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    • 3. 发明公开
    • COMMUNICATION METHOD, APPARATUS AND SYSTEM
    • EP4021093A1
    • 2022-06-29
    • EP19942868.1
    • 2019-08-31
    • Huawei Technologies Co., Ltd.
    • YU, FangYU, FengLI, Yan
    • H04W52/26H04W28/24
    • This application provides a communication method, apparatus, and system. In the method, a PDU session of a terminal is anchored to an anchor user plane gateway through an access network device, a user plane path between the terminal and the anchor user plane gateway includes a first link and a second link, the first link is a user plane data link for communication between the terminal and the access network device, and the second link is a user plane data link for communication between the access network device and the anchor user plane gateway. The access network device or the anchor user plane gateway obtains packet loss statuses of a service flow on the first link and the second link; determines a quantity of consecutive lost packets of the service flow on the user plane path based on the packet loss statuses of the service flow on the first link and the second link; and when the quantity of consecutive lost packets of the service flow on the user plane path reaches a first threshold, triggers enabling of a high-reliability transmission mechanism for the service flow. This improves data transmission reliability, avoids application shutdown, and improves user experience.
    • 5. 发明公开
    • CAMERA LENS, CAMERA MODULE, AND TERMINAL
    • EP3779551A1
    • 2021-02-17
    • EP19840161.4
    • 2019-02-21
    • HUAWEI TECHNOLOGIES CO., LTD.
    • YU, FengANZAWA, TakuyaNODA, Sayuri
    • G02B13/00G02B13/18H04N5/225
    • This application provides a camera lens, a camera module, and a terminal. From an object plane to an image plane along an optical axis, the camera lens includes: a first lens, a diffractive optical element, and a lens module. A surface that is of the first lens and that faces the object plane side is a convex surface at the optical axis, a surface that is of the first lens and that faces the image plane side is a concave surface at the optical axis, and the first lens has a positive focal power. The diffractive optical element has a positive focal power and a negative dispersion property, and includes a surface facing the object plane side, a surface facing the image plane side, and a diffractive surface between the two surfaces. The surface facing the object plane side is a convex surface at the optical axis, and the surface facing the image plane side is a concave surface at the optical axis. The lens module includes N lenses. At least one of a surface facing the object plane side and a surface facing the image plane side that are of each of the N lenses is an aspheric surface, and the lens module has a positive focal power. The camera lens provided in this application can meet requirements for miniaturization and high imaging quality in addition to a requirement for a size increase of an image sensor.
    • 8. 发明公开
    • COMMUNICATION METHOD AND APPARATUS
    • EP4054286A1
    • 2022-09-07
    • EP19955653.1
    • 2019-12-10
    • Huawei Technologies Co., Ltd.
    • YU, HaifengYU, Feng
    • H04W88/00H04L12/42
    • This application relates to the field of communication technologies, and provides a communication method and apparatus, to improve data transmission reliability. In a network architecture to which the communication method is applicable, a ring network topology structure is constituted by a first access network device and a slave station device together with a first terminal apparatus and a second terminal apparatus, and the first access network device is further connected to a master station device via a core network device. When the master station device sends a data packet to the slave station device by using the network architecture, the communication method used between the first access network device and a terminal apparatus includes: The first access network device obtains a correspondence between the first terminal apparatus and the second terminal apparatus. After obtaining a data packet, the first access network device sends a same data packet to the first terminal apparatus and the second terminal apparatus based on the correspondence, so that the first terminal apparatus and the second terminal apparatus transmit the same data packet to the slave station device.