Hong Kong Applied Science and Technology Research Institute Company, Limited

Ka Ho Mui

Yau Yau Yolanda Tsang

Yee Simon Wong

Wei Chen

Liang Dong

Jingwei Liu

Jianjun Zhang

Shijun Fan

Hang Chen

Zhicheng Luo

Liang Xia

Dongzhe Su

Ho Man Cheng

Yao Cheng Liang

Hua Shen

Siu Ping Chan

Kuankuan Yang

Described is a method of calibrating a camera. The method comprises defining an area observed in a field of view (FOV) of the camera as a region of interest (ROI). The method includes selecting a plurality of physical reference points in said ROI and obtaining for each reference point physical position coordinates. The method also includes obtaining from said camera FOV or camera image data pixel locations for each point of reference and pairing each pixel location with the physical position coordinates of its respective reference point. Then, a relationship is derived from the paired pixel locations and physical position coordinates to enable a selected or identified pixel location in the camera FOV or camera image data to be transformed to physical position coordinates for a corresponding physical location in said ROI.

Camera calibration method

Described is a method of calibrating a camera. The method comprises obtaining geographical coordinates of a selected physical point location within an image view of the camera and measuring an angle between an x-axis of a real-world coordinate system passing through said selected point location with respect to true north. The method includes using said obtained geographical coordinates, said measured angle, and projection data derived from characteristics of the camera to derive modified projection data for transforming a two-dimensional pixel coordinate system of the camera image view into a three-dimensional geographical coordinate system for point locations within the image view of the camera.

Described is a method of processing data packets in a communications network. The method comprises receiving a first data packet of a data packet flow from a network device and determining an instruction set for processing said first data packet. A flow key for said first data packet is determined. The first data packet is processed according to the determined instruction set. The method includes receiving a subsequent data packet and determining if a flow key of said subsequent data packet matches said flow key of said first data packet. If yes, the subsequent data packet is processed using the instruction set determined for said first data packet.

Method to accelerate packet detection rule (PDR) matching and data packet processing in a user plane function (UPF) module in a communications network

A method for improving road safety of a vehicle in a system having a plurality of communicatively connected roadside units (RSUs) placed within a defined geographical area, each RSU configured to receive data from a plurality of sources located within its respective coverage area forming part of said defined geographical area and to at least transmit the received data and/or data derived from the received data to one or more data processing units located within its coverage area. The method has the steps of: receiving data defining an event Eoccurring within the coverage area of an event RSU; determining a type of the event E; and based on the type of event E, communicating data defining the event Eor data related to the event Efrom the event RSU to one or more selected RSUs from remaining RSUs.

Method for relaying event information in a multi-tier V2X system

A method and apparatus for transporting packets over a wide area network (WAN) in a communications network are provided where the WAN comprises a plurality of interconnected nodes including at least a first communication node, a second communication node and a WAN controller node. The method comprises establishing virtual private network (VPN) tunnel connections on communication links between some or all of the communication nodes comprising the WAN, using a non-stream-oriented transport layer protocol to establish a non-stream-oriented association for each VPN tunnel connection, and, on receiving a packet connection from a source device at said first communication node, encapsulating packets from said packet connection into one or more non-stream-oriented associations between the first communication node and the second communication node to thereby transport said packets from the source device to the second communication node. The WAN controller node communicates to the first communication node a selection of links or routes for packet transport to the second communication node. The first communication node selects the one or more non-stream-oriented associations for encapsulating packets into from a plurality of non-stream-oriented associations established on the links or routes communicated to said first node by the WAN controller node.

Method and an apparatus for establishing secure, low latency, optimized paths in a wide area network

A method for setting-up a tunnel connection for transporting data packets over a high latency network connection in a communication network comprises the step of, at a module or node configured on a tunnel connection initiator side of the high latency network connection, using a non-TCP connection to encapsulate a set-up connection message for sending to a module or node configured on a core network (CN) side of the backhaul network to offset-up a data packet transport tunnel connection between the initiator side of the high latency network connection and core network (CN) side of the high latency network connection.

Method and an apparatus for reducing connection set-up time in a communications network

Provided is a method of modifying a data path between a user equipment (UE) and a core network node (CNN) in a wireless communication network. The method comprises the steps of: at a network node handling both signalling messages and user data for an existing data path between said UE and said CNN, obtaining data uniquely associated with a data path resource for said UE and/or uniquely identifying said UE and mapping said data to said existing data path; and modifying said existing data path based on said mapping. The network node handling both signal messaging and user data for an existing data path may comprise a gateway (GW) connecting a source base station (SBS) and a target base station (TBS) to a Mobility Management Entity (MME) of the core network, said GW being configured to handle both user plane data and control plane data for a plurality of UEs. The data uniquely associated with a data path resource for said UE and/or uniquely identifying said UE may be obtained from a Source to Target Transparent Container Information Element (IE) of a Handover Required message issued by the SBS.

Method and apparatus for modifying a user data path in a wireless communication network

A gateway (GW) acquires an International Mobile Subscriber Identity (IMSI) of a user equipment (UE) without requesting a mobile management entity (MME) of a core network (CN) to provide it. The GW detects arrival of a SAP message for the UE. If the GW does not have the IMSI of the UE, and if a NAS payload of the SAP message is ciphered, send to the UE a rejecting message indicating detaching the UE from the CN, causing the UE to request re-attaching to the CN in a SAP message that is an Initial UE Message, which contains a temporary identifier of the UE. Then alter the Initial UE Message with a fabricated temporary identifier not recognizable by the MME and send the altered message to the MME, causing the MME to ask the UE to identify itself with the IMSI, which is read by the GW.

Acquiring permanent identifier of user equipment by gateway in mobile communication system

A method for reducing paging traffic between a gateway (GW) and plural base stations (BSs) is provided when paging user equipments (UEs). A cache map, which records most-recently visited BSs of selected UEs, is used to limit the number of BSs in the paging of each selected UE, thereby reducing paging traffic. Furthermore, paging requests sent to the same BS node are grouped into one batch in generating a transport-layer payload, reducing the number of generated transport-layer messages. When used in a LTE system, piggybacking paging requests as provided by the SCTP reduces paging traffic and windowing/congestion control overhead at the transport layer. Transmission efficiency is thus improved. In addition, the number of paging requests sent out by the GW node per one paging interval is controlled to be not greater than a pre-determined maximum value to further limit paging traffic for avoiding occurrence of a paging storm.

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Hong Kong, China

Ka Ho Mui