4 results about "Frame check sequence" patented technology

This invention relates to the field of communication technology, specifically to a collision detection method and related equipment for ultra-short-range shared medium networks. The method includes: a master node broadcasting downlink messages on a downlink channel, and slave nodes sending uplink messages within a shared uplink contention window; each slave node starting an acknowledgment response timer for each sent uplink message and waiting to receive an acknowledgment message from the master node; the master node performing frame check sequence verification on the received uplink messages, and if a verification error is found, sending a verification error alarm message to the slave node at the corresponding source address; the slave node determining a serious collision when the acknowledgment response timer expires, or determining a collision event when it receives a verification error alarm message; and the slave node executing a backoff strategy based on the collision detection results. This invention enables efficient and reliable collision detection without adding additional hardware receivers, reducing system costs and design complexity, and is suitable for ultra-short-range scenarios such as intra-robot communication.

The present disclosure provides methods, components, devices, and systems for beacon extension design. A wireless station can receive one or more beacon containers including a beacon extension container and can communicate one or more messages based on a section of the one or more beacon containers related to the wireless station. Each section can correspond to a respective device type. Each section can include a frame check sequence and a message integrity code corresponding to each respective section. The wireless station can receive a first beacon container according to a first periodicity and a second beacon container according to a second periodicity. The first periodicity and the second periodicity can have different values based on a device type of the wireless station. The beacon container can include a type-specific section corresponding to the device type. Each type-specific section can include a parameter or updated information of the wireless station.

The invention discloses a data communication method, device and system and a storage medium, and relates to the technical field of Ethernet communication, and the data communication method comprises the steps: firstly obtaining a plurality of data packets generated by an upper-layer application, and then constructing corresponding communication sub-packets according to the data length, the content and the check code of the data packets; and extracting a standard Ethernet frame header, inserting a combined identification field, splicing the communication sub-packets to the identification field in sequence, adding a frame verification sequence to generate a combined packet, and sending the combined packet to a receiving end. And the receiving end executes first integrity check through the frame check sequence, splits the communication sub-packets according to the merging identifier after the first integrity check passes, and executes second integrity check through the communication sub-packet check code to process the effective communication sub-packets. According to the invention, the redundancy overhead is reduced through merging and packaging of multiple small data packets, the equipment compatibility is guaranteed by the standard frame header, the anti-error-code capability is improved through double-layer verification, and the transmission efficiency and the anti-error-code performance of the small data packets can be optimized while the compatibility is considered.

A technique involving a novel padding scheme in wireless communication is described. An apparatus (e.g., a station (STA)) performs wireless communication by: (a) generating and transmitting a physical-layer protocol data unit (PPDU); or (b) receiving and processing the PPDU. The PPDU includes a post-frame check sequence (post-FCS) padding following its frame check sequence (FCS) field.