10 results about "Message length" patented technology

The application relates to the technical field of network communication, and discloses a congestion control method and device, electronic equipment, a storage medium and a program product. The method sets special length-fixed probe request messages and probe response messages, and calculates a round-trip time based on a request sending timestamp, a request receiving timestamp, a response sending timestamp and a response receiving timestamp, effectively eliminates the influence of message length difference and response side scheduling time fluctuation on the calculation of the round-trip time, and significantly improves the measurement accuracy. Since the probe response messages are transmitted through a special traffic category channel, logical isolation of probe traffic and service traffic is realized, and the interference of the response path congestion on the measurement result is greatly reduced. Since all the timestamps are recorded by the network card hardware, the accuracy and real-time performance of the time recording are ensured, dependence on special functions of the switch is avoided, and excellent compatibility and practicability are achieved.

The application relates to a request comparison method and device applied to UVM verification, a computer device, a computer readable storage medium and a computer program product, which can be used in the field of computer technology. The method comprises the following steps: creating a transaction class corresponding to a storage access operation; generating an instance message of the storage access operation according to the transaction class, and storing the instance message in an expected queue; in the case that a storage access request message to be compared meets protocol conditions and design specification conditions, comparing the storage access request message with the instance message in the expected queue to obtain a comparison result of the storage access request message; the comparison processing comprises start address comparison processing and message length comparison processing; and the comparison result is used to determine an access verification result of the storage access request message. The method can improve the efficiency of access verification.

This application provides a communication method, communication device, system, and computer-readable storage medium. The method, applied in the field of communication, allows a reader to accumulate and statistically analyze the number of valid terminals within the current access period based on received and parsed Msg1 messages from multiple terminals. Then, it matches different AS ID compression strategies according to the range of terminal counts to determine the target number of bits for the AS ID of each accessing terminal, thereby assigning an AS ID with a different number of bits to each terminal. Furthermore, this application's embodiments overcome the limitation of using a traditional fixed 16-bit AS ID for each terminal in NACK messages. It allows for flexible selection of access identifiers based on the number of accessing terminals. This method can adapt to more scenarios, significantly reducing NACK message length and air interface transmission load, improving transmission efficiency and compatibility. It also eliminates the need for significant hardware or protocol stack modifications for terminals, reducing standard upgrade and terminal adaptation costs.

The invention relates to a computing power identification signaling construction method and device, communication equipment, a storage medium and a computer program product. The method comprises the following steps: an initiator generates a signaling message; the signaling message comprises a message header and a message body; the message header includes a message type, a message length, and a transaction identifier. By adopting the method, the computing power resource management efficiency can be improved.

The present application relates to a method and apparatus for constructing computing power identification signaling, a communication device, a storage medium and a computer program product. The method comprises: an initiator generates a signaling message, the signaling message comprising a message header and a message body, and the message header comprising a message type, a message length and a transaction identifier. By using the present method, the efficiency of computing power resource management can be improved.

This invention discloses a method and related equipment for identifying key fields in industrial control protocols, belonging to the field of cyberspace security technology. The method includes: if a delimiter exists in the message, identifying key fields in the protocol using the features of the delimiter; if no delimiter exists in the message, performing type-length-value decoding on the protocol; if decoding is successful, identifying key fields in the protocol using type-length-value decoding; if decoding fails, when there is only one length field in the protocol, identifying the length field based on the correlation between the message length difference and the field value difference, and identifying the structure identifier field based on the consistency of the field value in similar messages; when there are multiple length fields in the protocol, identifying the structure identifier field based on the protocol spectrum and convolutional neural network, and identifying the length field based on multidimensional hypothesis testing. This method can effectively identify structure identifier fields and length fields in industrial control protocols.

This application provides a method and system for processing physical interaction data of power grid equipment. The method constructs flow description information for each periodic data stream based on the message transmission period and message length of each intelligent electronic device (IED) in the process layer. Based on the flow description information, worst-case arrival analysis is performed for each output port in the TSN. Based on the results of the worst-case arrival analysis, a gating schedule for each output port in the TSN is generated or adjusted. Based on the generated gating schedule, a transmission phase offset parameter is assigned to each IED. During the operation of the TSN network, delay measurement is performed on the periodic data streams to obtain delay statistics. Based on the delay statistics, the gating schedule is adaptively adjusted to maintain message transmission delay jitter within a preset upper threshold, thereby improving the determinism and reliability of critical periodic data stream transmission in the process layer of the intelligent substation.

A communication rate optimization method and system for intelligent circuit breaker (PCB) data acquisition is disclosed. A master-slave 485 serial communication network architecture is adopted, with the master station communicating with multiple slave PCBs via an edge gateway. First, the broadcast parameters for the PCB data acquisition task are determined. The master station's edge gateway sends a call address command, and the slave stations respond according to priority, calculating communication parameters based on the number of devices and message length. The master station evaluates the overall data transmission time by calculating the response time interval and determines whether the communication efficiency is optimal. A communication rate optimization mechanism is established, with the master station dynamically adjusting the safety factor to balance stability and transmission efficiency. Specifically, this is achieved by detecting data packet conflicts, adjusting the safety factor calculation method, and optimizing the slave station response priority based on device alarm status. This invention enables one-question-multiple-response communication, automatically adjusting communication efficiency, and improving the efficiency of serial communication data acquisition.

This application relates to a PMU encrypted communication anomaly self-healing method, system, computer device, and storage medium based on protocol stack state machine learning. The method includes: when PMU encrypted communication transmits data at a preset fixed frame rate, extracting message length and arrival time to generate a protocol stack state feature sequence; constructing a baseline model based on the statistical distribution of normal states; calculating the deviation of the real-time feature sequence relative to the baseline model using a sliding window; when the deviation exceeds a threshold, comparing the dual-end encryption policy parameters to obtain a consistency judgment result; jointly analyzing the deviation and consistency results to distinguish the anomaly type; if the anomaly type is tunnel dead, sending a key exchange protocol deletion message and reconstructing the security association; if it is policy mismatch, issuing a policy correction command through the northbound interface and triggering key renegotiation. This application can distinguish the root cause of encrypted communication anomalies and repair them specifically, improving the repair efficiency of encrypted communication anomalies and the continuity of data transmission.

The application provides a message management method and device and a computer readable storage medium, which are applied to a server. When a connection response message meets a message condition, a message data pair generated in a communication process of a client and the server is acquired, the message data pair comprises a request message and a corresponding response message, the response message at least comprises an encrypted resource locator, then a ciphertext length corresponding to the encrypted resource locator is determined based on a response message length corresponding to the response message, a plaintext length set is generated based on the ciphertext length, and finally, the plaintext length set is compared with a locator length set to obtain a comparison result. Based on the response message, the plaintext length set with the plaintext length of the encrypted resource locator before encryption can be generated, and the plaintext length set is compared with the locator length set to determine whether the encrypted resource locator is a target resource locator, so that whether the network resource address accessed by the user is safe can be accurately determined, and the network security risk is reduced.