Hong Kong Applied Science and Technology Research Institute Company, Limited

Thomson Licensing

Tak Wing Lam

Tak Fuk Wong

Kang Heng Wu

Ka Yuk Lee

Chun Yin Ng

Sai Fan Chan

Kwok Fai Ng

Liang Qiao Chen

Yeaun Jau Liou

Kei Keung Hung

Kam Hing Lau

Qing Shan

Kai Wah Yeung

Chik Ki Yeung

Ka Wah Wong

A 3D building model generator has a server that constructs a 3D texture model for each floor in a building by extruding a 2D floor plan to 3D using user-inputted heights, and adding photos captured by a smartphone or mobile device as textures to image planes for surfaces in the 3D model. The server displays on the smartphone a floor-plan portion, or a virtual 3D display based on the camera orientation with a facing wall highlighted and confirmed by a smartphone user. The user moves mapping points overlaid upon the photo to wall corners to map the photo to the facing surface in the model. The user flags rooms and exits such as doors and elevators as walkable. The server stacks the 3D texture model for the floors and connects them into a walkable network of the rooms and exits that are flagged as walkable. Hashing removes duplicate floorplans.

Streamlined construction of 3D building and navigation network

Systems and methods which provide for auditable data are described. Data management systems of embodiments facilitate storage and management of various data (e.g., information regarding transactions, customers, infrastructure, geographic locations, medical records, etc.) for supporting data creation, manipulation, storing, and/or sharing by and among different parties. Users may create new and/or update data, digitally sign the data, and store the digital signature and data on immutable storage using data structures of a data management system. A data structure in which data and associated metadata is stored on immutable storage in association with a digital signature corresponding to the data and user may be used in providing data traceability and auditability. Snapshots of merged data may be implemented with respect to data having many updates to avoid delays in merging update data for queries for that data. A collaborative rating mechanism may provide trust levels with respect to the data.

System and methods for auditable data management

A transient blockchain proxy server consolidates many individual requests to add data to a blockchain by aggregating hashed data from these requests and sending the aggregated hashed data to the blockchain network as a single request. The blockchain network adds a new block to the blockchain with the aggregated hashed data and returns a transaction identifier for the new block to the transient blockchain proxy server, which passes the transaction identifier back to all the requestors who then can directly use the blockchain network to verify the hashed data using the transaction identifier. The transient blockchain proxy server buffers all incoming requests until one of the pending requests reaches a send timepoint that is the blockchain network delay plus a buffer time before a guaranteed time of verification. All incoming requests are then consolidated and sent as a single transaction to the blockchain network. Tiered verification-time services are enabled.

Optimizing data transactions and verification on a blockchain network

Systems and methods which provide data exchange using a distributed ledger, wherein data is exchanged off-chain and information for accessing the off-chain data is exchanged through the blockchain, are disclosed. Embodiments may provide a hybrid blockchain data exchange platform storing large amounts of data (e.g., IoT data) in a data server outside of the blockchain, wherein a data consumer may obtain data from the data server using a token obtained from the blockchain. Embodiments of a hybrid blockchain data exchange platform provide for accuracy and security of the data without requiring storage of the full contents of the data within the blockchain, and/or provide data exchange in which the irrefutability of the data exchanged is ensured.

System and methods for data exchange using a distributed ledger

A long-range wireless network extends the battery life of the most remote end devices by forming pairs with a relayer end device that relays data from the remote end device to a gateway. The battery life of the relayer is reduced to extend the battery life of the remote end device. An analysis server selects pairs of end devices that have a difference in battery levels above a threshold, and require less transmission energy from the remote end device to the relayer than to the gateway. Energy or path losses are estimated based on geographic locations of end devices and terrain or obstacles. Redundant pairs from a remote end device are eliminated by selecting the relayer requiring the lowest transmission energy. A new configuration is sent to the remote end device. New configurations with higher Spreading Factors (SF) compensate for pairs with larger path losses to the relayer.

Optimizing battery consumption of remote end devices on a wireless long-range wide-area network (LoRaWAN)

Systems and methods providing synchronization of wireless device data based upon device synchronization prioritization determinations are described. Embodiments may make device synchronization prioritization determinations using device grouping identifiers with respect to a plurality of wireless devices and/or one or more device synchronization parameters for the wireless devices. Logic of a synchronization prioritization gateway of embodiments may implement a prioritization determination algorithm to determine a sequence of wireless devices for data synchronization for facilitating data synchronization with respect to a plurality of wireless devices in a timely and efficient manner. The logic of the synchronization prioritization gateway may implement a priority penalty attribute with respect to particular wireless devices to address aberrant behavior or other operation likely to impede efficient and/or timely data synchronization.

Systems and methods for wireless device synchronization

The present disclosure is related to a system for managing data exchanges between Bluetooth Low Energy (BLE) devices. The system includes a plurality of BLE devices. At least one BLE device is configured as a parent node and at least one BLE device is configured as a child node. The parent node is configured to receive a BLE packet, including data reported by the child node in a payload field of the BLE packet, and to use a location function to determine a location in the payload field for inserting data to be reported from the parent node. The parent node aggregates the data to be reported from the parent node and the data reported by the child node by inserting the data from the parent node into the determined location in the payload field of the BLE packet, and then broadcasts the BLE packet with the aggregated data.

Optimized deployment of BLE network and power efficient and secure management of data exchange between BLE devices

A remote control device comprising a motion detector consisting of a single accelerometer, means for receiving data from the motion detector and mapping the received motion detector data to at least one user instruction, and means for transmitting a signal indicative of the at least one user instruction.

Remote control devices and methods

A method includes receiving encoded media content, transforming the encoded media content into web page content by dividing the encoded media content into a plurality of web page files formatted as a static web page, and transmitting the web page content over the network in response to a request.

Systems, methods, and computer program products for transmitting and/or receiving media streams

A method for the fast reconstruction of content information of a recording medium. The method includes determining a signature of the recording medium, the signature having two or more elements; comparing the signature with two or more signatures stored in a content database; and retrieving associated content information from the content database if the signature matches a signature stored in the content database.

Method for fast reconstruction of content information

A method performed by a new joining peer device in a peer-to-peer (P2P) network comprises receiving a plurality of buffer maps, each of the received buffer maps associated with a respective other peer device in the P2P network. The method also includes discerning playback positions associated with the received buffer maps, generating a starting offset for the new joining peer using one or more of the discerned playback positions. Requests for portions of a media stream are scheduled in accordance with the starting offset, and the scheduler will build a buffer map from this offset and begin to request the media buffer.

Synchronizing buffer map offset in peer-to-peer live media streaming systems

Systems and methods are provided for scheduling data requests for streaming media data in a Peer-to-Peer (P2P) network. A method is provided to increase a peer's contribution to the whole P2P network by partitioning the data chunks to request into several regions according to their relative time urgency, and data requests are scheduled in an effort to maintain availability of data in each region to a corresponding predefined target amount.

Method of data request scheduling in peer-to-peer sharing networks

A method for determining the format of an optical recording medium () comprising one or more data or audio tracks or both types of tracks is proposed, the method being robust against partially corrupted data on the recording medium. The method comprises the steps of:

Growing community of inventors

Hong Kong, China

Tak Wing Lam