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7 results about "Frame aggregation" patented technology

Frame aggregation is a feature of the IEEE 802.11e, 802.11n and 802.11ac wireless LAN standards that increases throughput by sending two or more data frames in a single transmission. Every frame transmitted by an 802.11 device has a significant amount of overhead, including radio level headers, media access control (MAC) frame fields, interframe spacing, and acknowledgment of transmitted frames. At the highest data rates, this overhead can consume more bandwidth than the payload data frame. To address this issue, the 802.11n standard defines two types of frame aggregation: MAC service data unit (MSDU) aggregation and MAC protocol data unit (MPDU) aggregation. Both types group several data frames into one large frame. Because management information needs to be specified only once per frame, the ratio of payload data to the total volume of data is higher, allowing higher throughput.

Synchronization method and device for time synchronization of network system

The invention discloses a synchronization method and device for time synchronization of a network system, and relates to the technical field of computers, and the method comprises the following steps: when a master station sends a dynamic compensation synchronization frame, recording a compensation sending timestamp in a sensing identification field of a sending end; when the frame is received and transmitted from the station, the identification field is sensed at the port to determine a compensation receiving timestamp and a compensation transmitting timestamp. And the slave station identifies the dynamic compensation synchronization frame after reverse return, calculates dynamic compensation time information based on the compensation receiving timestamp and the compensation sending timestamp corresponding to the slave station, and reads and writes the dynamic compensation time information to a corresponding field. And the master station analyzes the returned dynamic compensation synchronization frame, aggregates the dynamic compensation time information of each slave station, and solves the dynamic compensation values of the master and slave stations in combination with the fixed link delay. And the master station corrects a local high-precision clock according to the data, and writes a compensation value into a local time correction register of the slave station to trigger a hardware counter to correct so as to complete synchronization of the master and slave clocks. By realizing dynamic residence separation, the problem of overlarge error is solved.
Owner:深圳市三旺通信股份有限公司

Frame aggregation-based fault-tolerant communication method for high-voltage cascade energy storage system

The invention relates to a cascading energy storage communication technology, in particular to a high-voltage cascading energy storage system fault-tolerant communication method based on frame aggregation and a storage medium. The method comprises the following steps of: serially connecting and aggregating a control frame sent to a sub-controller by a main controller and control instruction frames sent to all subordinate unit bodies into an aggregation packet, and redundantly sending the aggregation packet; the aggregation packet is divided into a data packet and a synchronous packet; the sub-controller carries out three-level receiving caching and processing on the aggregated packet sent redundantly, and executes different logics on the data packet and the synchronous packet; wherein the main controller sends serial control information of each unit body to the sub-controller, which is called as high-speed downlink; and the sub-controller sends control information to each unit body, namely low-speed downlink. According to the invention, while stable operation of the system is ensured, efficient data transmission and an intelligent control strategy are realized so as to adapt to increasingly complex power system requirements.
Owner:广州智光电气技术有限公司

Seamless roaming for multi-link device clients

Seamless client roaming for Multi-Link Device (MLD) clients may be provided. First, a Traffic Identifier (TID)-to-link map may be established by an Upper Service Access Point (U-SAP) of a multi-AP MLD entity that assigns subsets of TIDs to at least two links of the entity. For example, a client device logically associates with the U-SAP, while the client device physically connects to a first and second AP of the entity on a respective first and second link, where the first and second AP include first and second Lower Service Access Points (L-SAPs) and are non-collocated. Next, using the map, data received at the U-SAP is directed over one of the two links for transmission to the client device. Further, frame aggregation and block acknowledgment functions may be performed by one of the first or second L-SAP based on whether data transmission is over the first or second link.
Owner:CISCO TECHNOLOGY INC

A method and system for deep optimization of deep sea ecological monitoring

The application discloses a kind of deep optimization deep-sea ecological monitoring method and system, comprising: first, obtain deep-sea image or video data and carry out pre-processing, carry out denoising and detail enhancement;Second, a kind of integrated Swin Transformer main part, BiFPN neck and target detection architecture of combined query decoder are used, high-precision, anti-interference target detection is carried out to enhanced image;Then, the structured target data detected is inputted with original image into multimodal large language model, carries out the inference and analysis of deep ecological semantics such as species attribute, behavior mode;Finally, multi-frame aggregation and community analysis are carried out to video data, and structured deep-sea ecological monitoring report is automatically generated according to detection and analysis result.The application solves the problems of small target detection difficulty, serious background noise interference, low data analysis efficiency, lack of semantic understanding and automation capability in deep-sea environment through model innovation and fusion.
Owner:ZHEJIANG LAB

Temperature control method and device of equipment, electronic equipment and storage medium

The invention relates to a temperature control method and device of equipment, electronic equipment and a storage medium. Wherein the equipment supports data processing in a frame sequence form, the frame sequence corresponds to a frame aggregation length, and the temperature control method of the equipment comprises the following steps: detecting a temperature change rate of the equipment in a first duration in a process that the equipment performs data processing in a frame sequence corresponding to a first frame aggregation length; in response to the fact that the temperature change rate is a non-constant-temperature change rate, the first frame aggregation length is adjusted to be a second frame aggregation length, and the second frame aggregation length meets the requirement that the temperature change rate is converted into the constant-temperature change rate; and performing data processing according to a frame sequence corresponding to the second frame aggregation length so as to control the temperature change rate to be converted into the constant temperature change rate. According to the invention, hardware cost does not need to be increased, and user communication experience is optimized.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD