100 results about "Channel assessment" patented technology

A communication method, which is applied to a first multi-link device (MLD) operating in an enhanced multi-link single radio (EMLSR) mode and includes: performing, by the first MLD, a second listening operation, where the second listening operation includes: the first MLD performing a clear channel assessment (CCA) and receiving an initial control frame of a frame exchange sequence transmitted by an access point (AP) MLD through an affiliated station that operates on an EMLSR link in an awake state; and performing, by the first MLD, a first listening operation, where the first listening operation is used for a first station on the first MLD to receive a groupcast frame using a first receiving capability. The first MLD switches from the second listening operation to the first listening operation at a target time or before the target time.

The invention discloses a concurrent communication method and system based on a power line carrier communication network, and the method comprises the steps: obtaining service parameters and communication parameters in the power line carrier communication network, and carrying out the priority division of services; after the topology change of the power line carrier communication network is stable, the total number of nodes and the number of agent nodes are obtained, and the topology change time is recorded; calculating network channel evaluation time and a proxy node number threshold value; subcarrier division and distribution are carried out on each service according to service parameters, communication parameters, the total number of nodes and the number of proxy nodes of the power line carrier communication network; and recording a system communication success rate in the network channel evaluation time, calculating an SNR value and an SNR fluctuating value of a subcarrier channel, calculating a subcarrier static distribution time length by combining the system communication success rate, the SNR value and the SNR fluctuating value, and simultaneously communicating each service on the distributed subcarrier. According to the invention, the carrier network communication efficiency and the overall execution efficiency can be improved, and multi-thread processing of different service data among carrier nodes is realized.

The invention discloses a multimode narrowband ad hoc network communication system and method, and belongs to the technical field of communication systems.The multimode narrowband ad hoc network communication system is characterized in that environment sensing data of all nodes are monitored in real time, environment modes of different communication are distinguished, and corresponding channel assessment reports are generated; and determining a communication strategy of the corresponding node according to the environment sensing data and the channel evaluation report, thereby realizing narrow-band ad hoc network communication with low energy consumption, long distance and strong complex environment adaptability.

The invention relates to the technical field of software defined radio communication, and discloses a dual-mode adaptive communication method and system based on SDR. The method comprises the following steps: receiving an original wireless signal, preliminarily judging a protocol family, and activating a corresponding signal analysis engine and a channel evaluation engine; the signal analysis engine restores a complete communication message unit, and the channel evaluation engine quantitatively represents a channel state. The information of the two information is input into a dynamic decision-making network, and the network learns an implicit association rule between the semantic integrity of the message and the transmission reliability of the channel and outputs a collaborative decision-making instruction containing a mode priority weight vector. The instruction is finally compiled into a hardware configuration parameter sequence, and the radio frequency front end and the baseband unit are driven to reconfigure, so that mode self-adaptive switching is realized. According to the invention, cross-layer intelligent decision and flexible multi-mode scheduling are realized, and the reliability and efficiency of communication in a complex wireless environment are improved.

A channel assessment method includes: performing channel assessment in a shared spectrum, and alternatively, determining a channel resource occupied in the shared spectrum according to an interference condition between communication systems.

Systems and methods are disclosed for using clear channel assessment (CCA) on a transmission channel prior to transmission on the channel. A wireless transmission system can perform an omnidirectional CCA using a CCA power threshold calculated based on a number of synchronization signal blocks (SSBs) transmitted by the wireless transmission system using a synchronization signal block (SSB) burst or synchronization signal / physical broadcast channel (SS / PBCH) block measurement timing configuration (SMTC) window or based on a number of transmit (Tx) antennas used. The wireless transmission system can perform a directional CCA on one or more receive (Rx) beams corresponding to one or more intended Tx beams to determine directional availability of the channel using a CCA power threshold calculated based on an equivalent isotropically radiated power (EIRP) of the one or more intended Tx beams. The wireless transmission system can determine a CCA power threshold based on a scaling between an actual CCA bandwidth and a nominal CCA bandwidth.

A wireless network device configured to monitor multiple channels for clear channel assessment (CCA) is disclosed. The receiver circuit of the network device includes at least one CCA block for indicating whether a particular channel is clear. In some embodiments, the network device sequentially checks each channel and transmits at least one data packet if both channels are clear. The at least one data packet can include a mode switch data packet and a second data packet transmitted using a new PHY mode. The network device can also have multiple CCA blocks. In this case, the channels can be checked simultaneously and the network device transmits at least one data packet if both channels are clear. Alternatively, the network device simultaneously monitors multiple channels and selects one of the channels to transmit a preferred PHY mode on that channel, thereby avoiding the need for a mode switch data packet.

This invention relates to the field of wireless communication network optimization technology, specifically to an antenna layout and relay configuration optimization method based on a channel prediction surrogate model. The method includes: acquiring a digital twin environment model of the area to be optimized; constructing an original sample set by calculating channel parameters between candidate antennas and relay nodes through ray tracing; training and constructing a channel prediction surrogate model using improved sparse Gaussian process regression; and using location parameters as input and output channel quality indicators. A joint decision vector for antenna, relay location, and transmit power is defined, and an optimization objective function for total system capacity and deployment cost is defined. The surrogate model is embedded in Bayesian optimization as a fast evaluator, and the joint decision vector is iteratively sampled and evaluated. After convergence, the optimal layout configuration scheme is output. This method replaces real-time simulation with a dedicated surrogate model, achieving multi-parameter joint optimization and improving the efficiency of channel evaluation and optimization iteration.

The invention discloses a wireless terminal security management and control method and system, and relates to the technical field of power system communication security. The method comprises the following steps: in a communication connection establishment stage, establishing a shared key through WAPI bidirectional authentication and post quantum key encapsulation, and initializing a physical layer waveform parameter synchronization mechanism; in the security situation assessment stage, collected equipment characteristics, near field communication and electromagnetic environment data are fused, quantitative analysis is performed through a neural network and an attack graph model, and a dynamic security threat level is obtained; in the security policy execution stage, the security policy and physical layer parameters are adaptively adjusted according to the threat level and the channel assessment result to form closed-loop management and control. According to the method, the problems of single protection means, response lag and lack of quantum safety capability of a traditional scheme in complex environments such as a new energy station are solved, and active, accurate and self-adaptive wireless terminal safety protection is realized.

The invention discloses an interference scanning method and device, a channel evaluation method and electronic equipment. The interference scanning method comprises the following steps: performing interference scanning on each Bluetooth channel by adopting a discrete scanning sequence to obtain scanning data of each Bluetooth channel; carrying out effective judgment and preprocessing on scanning data of each Bluetooth channel; and determining interference envelope distribution of all the channels of the Bluetooth according to the preprocessed scanning data of each channel of the Bluetooth. According to the embodiment of the invention, each Bluetooth channel is scanned through discrete order scanning, so that the maximum time interval of scanning 13 Wi-Fi channels within 2402MHz to 2480MHz is relatively small, and compared with sequential scanning or common other order scanning, the probability of scanning missing caused by Wi-Fi interference can be reduced.

The invention relates to a resource allocation method and device for a multi-user orthogonal frequency division multiplexing system. The method comprises: sending a channel assessment message carrying a pre-configured channel assessment frame to a plurality of user nodes, the channel assessment message being used for indicating each user node to perform channel assessment according to the received channel assessment frame, and feeding back an average channel gain and an average signal-to-noise ratio obtained by assessment to a main node, the pre-configured channel evaluation frame is obtained based on configuration of a preset orthogonal frequency division multiplexing symbol sequence; receiving an average channel gain and an average signal-to-noise ratio fed back by each user node; and for each user node, determining a target bit number and target sending power allocated to the user node according to the average channel gain and the average signal-to-noise ratio fed back by the user node, generating a channel resource configuration frame according to the target bit number and the target sending power, and sending the channel resource configuration frame to the user node. By adopting the method, the calculation complexity of resource allocation can be reduced.

Techniques are disclosed to detect deep fading caused by magnitude drop and rapid phase change on channels within a frequency band of a narrowband wireless radio operating in a BMS-like environment with strong multipath. The techniques may identify an interference channel, a deep fading channel, or a weak signal channel. A channel assessment algorithm may receive packets on one of multiple channels to determine a received signal strength for each packet associated with the channel. The algorithm may determine a PER associated with the channel based on a number of packets received in error and a difference between the received signal strength of each packet and a reference signal strength associated with other channels of the frequency band. The PER may be compared with a PER threshold. The channel may be excluded from use by the wireless radio if the PER for the channel is greater than the PER threshold.

The invention discloses an anti-nesting self-adaptive protection method and system for a power transmission line, and relates to the technical field of power transmission line protection. The method comprises the following steps: deploying multiple sensors at key parts of a power transmission line tower, and constructing a sensing network to detect bird activity data flow in real time; calling the nesting threat evaluation dual-channel through an edge calculation unit, carrying out the recognition evaluation of the data flow, and outputting a threat parameter; analyzing the threat parameters based on a bird nesting protection strategy library, and determining a target protection strategy; and according to the strategy parameters, a nesting blocking and expelling linkage device is controlled, and self-adaptive feedback protection is carried out on the tower. The technical problems of short circuit, tripping and other potential safety hazards caused by bird nesting to the safety of the power transmission line are solved, bird activities are accurately detected in real time through a multi-mode sensing network, nesting behavior recognition and threat degree quantification are completed in combination with edge calculation dual-channel evaluation, the risk of short circuit tripping of the line is reduced, and the safety of the power transmission line is improved. And the operation reliability and the intelligent operation and maintenance level of the power transmission line are improved.

A method is disclosed in which a user equipment (UE) that communicates with a radio access network (RAN) maintains information for configuring timing of fixed frame period (FFPs) for a listen-before-talk (LBT) procedure. When the UE has data to be transmitted, it performs a clear channel assessment, CCA, to determine if a communication channel is clear. When the CCA indicates that the communication channel is clear a channel occupancy time, COT, is initiated for the UE within a subsequent FFP and transmission of the data commences. However, transmission of the data ceases following receipt of an indication, from a node of the RAN, that the transmission should be stopped.

The invention provides a channel evaluation method for power line carrier communication and electronic equipment. The method comprises the following steps: acquiring a channel evaluation frame which is sent by a signal sending end through multiple spatial streams and comprises a time domain training signal and a time domain load signal; respectively executing fast Fourier transform on the two types of time domain signals to obtain corresponding frequency domain training signals and frequency domain load signals; estimating a first channel matrix of the frequency domain training signal, calculating a training signal residual error to identify an abnormal frequency domain symbol, processing to obtain an effective training signal, and estimating a second channel matrix and a noise covariance matrix of the effective training signal; constructing a channel equalization matrix based on the two matrixes, and respectively processing the two types of frequency domain signals to obtain a training signal signal to interference plus noise ratio and a load signal signal to noise ratio of each subcarrier of each spatial stream; and finally, carrying out weighted fusion on the two types of indexes to generate a fusion signal-to-noise ratio for evaluating the channel quality of each subcarrier of each spatial stream. According to the invention, robustness and accuracy of power line carrier communication channel evaluation can be considered.

This invention discloses a multi-band power line communication network system, belonging to the field of communication technology. The multi-band power line communication network system includes a Control Center (CCO) and one or more Power Control Centers (PCOs), each PCO associated with one or more Stations (STAs). Specifically: the CCO is used to determine the current network state of the communication network after the main frequency band is networked, and to determine a channel evaluation strategy adapted to the current network state; each PCO and associated STA is used to perform channel quality evaluation on the main frequency band and sub-frequency bands according to the channel evaluation strategy, and to hierarchically aggregate and report at least some of the channel quality evaluation results to the CCO; the CCO is also used to perform communication topology adjustment and / or frequency band adjustment based on the channel quality evaluation results reported by each PCO. This invention achieves efficient and reliable activation of sub-frequency bands in the communication network.

Aspects relate to the amount of shared bandwidth to be used for channel occupancy time (COT) sharing. An initiator device may use a clear channel assessment procedure to gain access to wireless communication resources for a COT that will be shared between the initiator device and a responder device. In some examples, the responder device may determine the shared bandwidth based on information that is implicit in a transmission from the initiator device. For example, the responder device may determine the shared bandwidth based at least in part on a bandwidth of a transmission from the initiator device.

The application discloses a high-energy-consumption data instant perception transmission method and system based on wide-area measurement, which comprises the following steps: collecting power consumption data of each high-energy-consumption device in a wide area, determining an optimal sub-packet sequence and an optimal decision in transmission according to a dynamic programming algorithm, selecting transmission of a sub-packet or spectrum sensing for each transmission according to the decision, solving a signal gain corresponding to an optimal spectrum efficiency of each channel by using an optimization gradient algorithm, obtaining a delay corresponding to the signal gain, fusing the delay and the spectrum efficiency to obtain a channel evaluation index, and selecting an optimal channel according to the channel evaluation index; and transmitting data through the optimal channel according to the optimal decision, comparing priorities of additional data transmission tasks and the sub-packet to be transmitted next, and selecting data to be transmitted next according to the priorities. The application improves channel utilization and reduces data transmission delay.

This disclosure relates to a channel measurement method, a communication device, and a communication system. The channel measurement method is applied to a processing module of a communication device, which includes the processing module and at least two target chips. Each target chip executes a first wireless communication protocol. The method includes: the processing module sending a first message to each target chip, the first message instructing the target chip to perform a channel quality measurement operation on the channel under test; and the processing module receiving channel measurement results from the first target chip that performed the channel quality measurement operation, thereby coordinating channel quality measurement operations across multiple target chips. For chips with high loads, channel evaluation incurs a certain amount of overhead. However, for at least two independently operating target chips, it is not necessary to perform channel quality measurement operations on all channels separately, reducing the channel evaluation burden.

A method of wireless communication performed by a user equipment (UE), the method comprising identifying a priority level associated with the UE; and performing a clear channel assessment for a channel occupancy time (COT) according to an offset parameter, wherein the offset parameter is based on the priority level associated with the UE.

A method by a wireless device includes receiving, from a network node, a command associated with a procedure to setup or release a cell or a signal. While transmitting a Hybrid Automatic Repeat Request (HARQ), feedback associated with the procedure to setup or release the cell or signal, the wireless device detects one or more clear channel assessment (CCA) failures on an uplink signal. The wireless device extends a transmission period for transmitting the HARQ feedback associated with the procedure to setup or release the cell or signal based on the one or more CCA failures.

Systems, methods, and circuitries are provided for a UE performing sidelink (SL) communication in unlicensed spectrum to perform transmission resource selection. In one example, an apparatus for a user equipment (UE) operating in unlicensed spectrum is provided that includes one or more processors configured to cause the UE to receive configuration of pre-allocated resources in a plurality of sub-channels for sidelink (SL) communication; perform a clear sub-channel assessment (CCA) process in at least one of the plurality of sub-channels; determine a resource selection window comprising candidate resources in a subset of the pre-allocated resources; perform a resource selection process on the candidate resources in the resource selection window to determine transmission resources in at least two of the plurality of sub-channels; and based on results of the CCA process, transmit data using the transmission resources.

The invention relates to a communication method, device and system, a storage medium and a chip, and the method comprises the steps that second equipment sends channel negotiation information to first equipment, the first equipment is central equipment in a Bluetooth communication system, and the second equipment is peripheral equipment in the Bluetooth communication system; wherein the channel negotiation information is used for indicating the second device to accept or support a first channel or a first channel graph; and / or the channel negotiation information is used for indicating that the second device does not accept or support a second channel or a second channel graph. In this way, the problem of inaccurate channel evaluation in related technologies can be solved.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improved handling of adjacent channel interference in multi-link aggregation scenarios. In accordance with the described techniques, a device may establish a set of wireless links for communication with a second device, the set of wireless links supporting parallel transmission during at least a first duration of a multi-link session, the set of wireless links including at least a first wireless link and a second wireless link. The device may modify a transmission parameter for the first wireless link or a clear channel assessment (CCA) parameter for the second wireless link, or a combination thereof. The device may then perform the CCA procedure on the second wireless link and transmit at least a first portion of the message on the first wireless link based on the modified transmission parameter or modified CCA parameter.

Embodiments are disclosed for traffic engineering in support of real-time applications. A user equipment (UE) can detect a real-time application running on the UE, assess a link health corresponding to the real-time application, and transmit a payload including the link health to a peer device via WiFi communications. To detect the real-time application, the UE can receive traffic symptoms or application indications, and monitor corresponding traffic flows. To assess the link health, the UE can receive link quality metrics of a link corresponding to the link health, and determine an intra basic service set (BSS) clear channel assessment (CCA) percentage. The UE can initiate a Rapport session with the peer device, activate a keep-alive timer, and transmit updated information to the peer device according to the keep-alive timer.

The application discloses a quantum key distribution method and system based on real-time channel evaluation, and belongs to the technical field of quantum communication, and comprises the following steps: a communication party pre-negotiates a non-orthogonal quantum probe state pair and a theoretical jump probability thereof, and establishes an attack fingerprint library; a sending end sends a probe state, a test state and a key state according to an evaluation overhead ratio in each period; a receiving end calculates a quantum state fidelity anomaly vector according to a measurement result of the probe state; the anomaly vector is matched with the attack fingerprint library, and an identification confidence of various attacks is output; the evaluation overhead ratio and a protocol deflection angle of a next period are dynamically adjusted based on the identification confidence; finally, privacy amplification is performed in combination with the identification confidence and a measured bit error rate, and a final secure key is generated. Through real-time sensing of a channel state and dynamic adjustment of system parameters, the application can effectively identify a specific attack type, adaptively balance security and key generation efficiency, and thus improves the overall performance and attack resistance of a quantum key distribution system.

The invention discloses an audio and video playing system and method. The audio and video playing system comprises a master playing device and at least one slave playing device. The main playing device comprises a data transmission module and a channel evaluation module; the channel evaluation module is used for evaluating the quality of channels between the master playing device and the slave playing devices in real time, and when the cleanest channel is identified and is not the channel currently adopted by the master playing device, the channel evaluation module is used for evaluating the quality of the channels between the master playing device and the slave playing devices. Target channel information representing the cleanest channel is sent to the data transmission module; and the data transmission module is used for transmitting playing data to each slave playing device, receiving the target channel information, transmitting the target channel information to each slave playing device, and performing synchronous frequency hopping with each slave playing device to the cleanest channel represented by the target channel information. According to the invention, the playing effect can be improved, and the user experience brought by the audio-video playing system is improved.

This application provides a channel contention method and a related apparatus. The method includes: After data transmission on a first link is completed or a block acknowledgment corresponding to data is received on the first link, a first non-access point station of a first multi-link device performs clear channel assessment CCA detection on a second link in a first time period, where a start moment corresponding to the first time period is the same as a moment at which the data transmission on the first link is completed; and when the CCA detection on the second link fails, the first non-access point station performs channel contention on the second link based on a second time period.

A method of extending bandwidth of a first wireless communication device includes receiving a frame carrying transmission opportunity (TXOP) information from a second wireless communication device over a first channel of the first wireless communication device having a first bandwidth, where the TXOP information indicates that the TXOP is shared or transferred from the second wireless communication device to the first wireless communication device; performing clear channel assessment (CCA) detection on a second channel having a second bandwidth of the first wireless communication device to generate a CCA detection result; and in response to the received frame and the CCA detection result indicating that the idle time of the second channel is not less than the predetermined time, starting to access an extended bandwidth, the extended bandwidth including the first bandwidth and the second bandwidth.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improved handling of adjacent channel interference in multi-link aggregation scenarios. In accordance with the described techniques, a device may establish a set of wireless links for communication with a second device, the set of wireless links supporting parallel transmission during at least a first duration of a multi-link session, the set of wireless links including at least a first wireless link and a second wireless link. The device may modify a transmission parameter for the first wireless link or a clear channel assessment (CCA) parameter for the second wireless link, or a combination thereof. The device may then perform the CCA procedure on the second wireless link and transmit at least a first portion of the message on the first wireless link based on the modified transmission parameter or modified CCA parameter.