3 results about "Beacon period" patented technology

This application provides an adaptive time synchronization compensation method, a terminal device, a gateway device, and a system. The adaptive time synchronization compensation method includes: receiving a beacon frame from a gateway; parsing a timestamp, an actual beacon period value, and an over-the-air transmission time value carried in the beacon frame, wherein the timestamp represents the absolute time at which the gateway begins sending the beacon frame, and the actual beacon period value is the actual interval between the start times of two adjacent beacon frame transmissions, as measured by the gateway based on its hardware clock; recording the local reception completion time of the beacon frame on the terminal device side; calculating a first time deviation between the local clock of the terminal device and the gateway clock based on the timestamp, the over-the-air transmission time value, and the local reception completion time; correcting the local clock of the terminal device according to the first time deviation; and calculating and determining subsequent periodic reception time slots of the terminal device based on the corrected local clock, the actual beacon period value, and predefined reception time slot parameters.

A management device (100) manages a plurality of communication devices (110; 120; 130; 140; 150; 160; 170) in a communication system (10) that communicates according to a predetermined beacon period. The management device (100) includes a processor. The processor acquires, from each of the communication devices (110; 120; 130; 140; 150; 160; 170), transmission data information that is information including a data amount and a transmission priority relating to data to be transmitted in the next beacon period; determines, based on a plurality of pieces of the transmission data information acquired, a transmission data amount allowed for each of the communication devices (110; 120; 130; 140; 150; 160; 170) in the next beacon period; and notifies the communication devices (110; 120; 130; 140; 150; 160; 170) of the determined transmission data amount in the current beacon period.

A system for transmitting primary and secondary data, the system comprising: a bus; a parent node coupled to the bus; and a plurality of child nodes each coupled to the bus, wherein: the parent node is configured to periodically transmit a time-domain multiplexing (TDM) periodic beacon to the bus, wherein the TDM periodic beacon signals the start of a primary data transmission interval, and wherein the primary data transmission interval is a period reserved for the transmission of primary data by the parent node and the plurality of child nodes; each of the parent node and the plurality of child nodes is operable to transmit primary data of a current TDM beacon period associated with the TDM periodic beacon to the bus during the primary data transmission interval in response to the TDM periodic beacon; and the parent node and the plurality of child nodes are operable to transmit secondary data to the bus during a secondary data transmission interval between the end of the primary transmission interval and the transmission of the next TDM periodic beacon by the parent node.