310 results about "Channel assessment" patented technology

There is disclosed a method of operating a wireless device in a wireless communication network, the wireless device being adapted for operating based on a clear channel assessment, CCA, on at least one carrier and / or cell for which an eDRX cycle is configured. The method includes performing one or more radio procedures based on one or more CCA parameters. The disclosure also pertains to related devices and methods.

The invention relates to the technical field of Internet of Things routing management, in particular to a big data-based routing optimization method, which comprises the following steps of: acquiring spectrum data of an Internet of Things routing management area, performing correlation analysis on a spectrum state corresponding to a historical success rate and retransmission times of communication between nodes, and quantifying a probability of successful communication at a future target time. According to the method, the multi-band historical communication success rate and retransmission frequency data are dynamically acquired, the interference risk of the target time period is analyzed and predicted in combination with the time sequence, an interference avoidance strategy based on static channel assessment is upgraded to a probability-driven pre-judgment mechanism, and the anti-interference capability of a transmission path in a complex electromagnetic environment is improved. According to multi-protocol link characteristics of Bluetooth, WiFi, 2.4 G and the like, parameters such as delay, throughput, packet loss rate, flow cost and the like of a single path are synchronously quantified, a unified performance cost file of a heterogeneous network link is established, and end-to-end performance modeling of cross-protocol path combination is realized.

The invention discloses a multi-node secure communication method and system based on quantum key distribution, and the method comprises the steps: evaluating multi-dimensional parameters of a quantum channel, dynamically updating a node reputation value, constructing a four-dimensional topological graph database, and generating candidate routing paths based on a Monte Carlo tree search algorithm; a state-action space is constructed by further combining reinforcement learning, and path selection is optimized by using a dual Q network and a priority experience playback mechanism; through multi-dimensional channel assessment and node reputation value dynamic updating, the defects of a traditional quantum network static routing strategy are overcome, the communication safety and efficiency are improved, and low-delay and high-reliability key distribution of a complex quantum network is supported.

Embodiments of this application disclose a data transmission method and a communication device, to improve channel bandwidth utilization and data transmission efficiency. The data transmission method provided in embodiments of this application includes: performing clear channel assessment on an existing wireless fidelity Wi-Fi channel to obtain a channel assessment result; determining a target channel based on the channel assessment result, where a bandwidth of the target channel is greater than 80 megahertz MHz, and the bandwidth of the target channel is not a bandwidth of the existing Wi-Fi channel; and sending data to a receiving end through the target channel, or receiving data from a transmitting end through the target channel.

Systems and methods for coverage enhancements for sidelink (SL) synchronization signal block (SSB) (S-SSB) between a transmit (Tx) user equipment (UE) and a receive (Rx) UE are disclosed herein. S-SSB frequency domain enhancement may use frequency hopping for S-SSB and / or S-SSB that use an increased number of physical radio bearers (PRBs). S-SSB time domain enhancements may modify an S-SSB periodicity, a number of S-SSB per period, use a clear channel assessment (CCA) (or listen before talk (LBT)) procedure, and / or transmit only some of a configured set of S-SSBs for an S-SSB periodicity. Multi-beam S-SSB enhancement may index S-SSBs of a configured set and send those S-SSBs using beams corresponding to the indexes. S-SSB enhancement using frequency domain masking and / or time domain masking may apply different masks to one or more S-SSBs.

The invention relates to the technical field of flight control, in particular to a low-altitude traffic control method and system for an aircraft. The control method comprises the steps that a wireless communication network is built, data exchange between the aircrafts is ensured through a multi-layer topological structure and a dynamic spectrum management technology, and the wireless communication network adopts a channel evaluation mechanism to adapt to a changeable airspace environment and ensure stable high-bandwidth connection. According to the invention, a wireless communication network is established and a multi-level topological structure and a dynamic spectrum management technology are adopted, so that the problem of communication delay caused by dependence on ground infrastructure in a traditional system is solved. Through a channel evaluation mechanism, the network can adapt to a changeable airspace environment, stable and reliable data transmission between aircrafts is ensured, and the realization of high-bandwidth connection provides a solid guarantee for real-time monitoring and dynamic decision making.

The invention relates to a mechanism for handling transmission opportunity termination in non-primary channel access. This disclosure describes systems, methods, and devices related to enhanced channel efficiency. The device may enable utilization of the secondary channel within the Wi-Fi network when the primary channel is occupied. The device may monitor the state of the primary channel when the primary channel is busy. A device may assess the presence of energy in a primary channel using clear channel assessment (CCA) during a receive mode. The device may provide a state of the primary channel via block acknowledgement during a frame exchange on the secondary channel when the primary channel is determined to be idle. The device may switch back to the primary channel by a broadcast frame or a unicast frame indication.

The invention discloses a multi-mode underwater acoustic communication system and communication method based on a heterogeneous dual-core architecture, and belongs to the technical field of underwater acoustic communication. The multi-mode underwater acoustic communication system comprises a main control module, an acquisition module and a transmitting module; the main control module adopts a dual-core heterogeneous processor OMAPL138 formed by an ARM core processor and a DSP core processor; inter-core communication is carried out between the ARM core processor and the DSP core processor through a shared memory and interruption; the ARM core processor is responsible for protocol analysis, task scheduling and man-machine interaction, and the DSP core processor focuses on signal processing and real-time control and integrates four communication systems, a channel evaluation module and the like. The problems that application of a single communication mode is limited and underwater acoustic communication links in different complex sea areas are unstable are effectively solved, and the deep sea area underwater vehicle information collaboration and return and deep sea area observation and monitoring network system capacity are effectively improved and guaranteed.

The invention relates to the technical field of automobile communication, in particular to a wireless connection optimization method and device for an intelligent cabin car-aircraft interconnection system, electronic equipment and a storage medium, and the method comprises the steps: constructing a candidate channel list based on a network unique identifier and channel information of a historical successful connection network; concurrently performing a Wi-Fi scan on a plurality of common channels in the candidate channel list to identify at least one candidate wireless connection link; taking the candidate channel with the highest channel quality score in the candidate channel list as a target channel; wherein the channel quality score is calculated based on the packet loss rate, the signal strength and the interference parameter of the candidate channel. According to the method, on the basis of historical channel weights and a multi-stage concurrent scanning mechanism, consumed time of a Wi-Fi scanning stage is reduced, a target channel is rapidly determined through dynamic channel evaluation, and the connection speed and the connection success rate of the whole process are improved by combining asynchronous split WPA2 handshake and service initialization parallelization.

The invention relates to the technical field of wireless communication, in particular to an OTA upgrading method and system for Bluetooth sound equipment. The method comprises the following steps: acquiring to-be-upgraded firmware data and currently played audio data, and acquiring power amplifier current feedback data of a sound speaker by sending a double-frequency detection signal containing 21kHz and 22kHz; acquiring equipment transmission capability confirmation data according to a silent response mode of the sound equipment to the preset handshake signal; and calculating a nonlinear distortion coefficient of the loudspeaker according to the intensity of the 1kHz difference frequency component in the power amplifier current feedback data, and obtaining real-time channel evaluation data based on current waveform deviation analysis. According to the method, the nonlinear distortion degree of the loudspeaker is accurately evaluated through the 1kHz difference frequency component generated by the 21kHz and 22kHz dual-frequency detection signals, so that the reliability of data transmission is more accurately predicted.

Systems and methods for User Equipment (UE) operation in presence of Clear Channel Assessment (CCA) are provided. In some embodiments, a method performed by a wireless device for cell selection accounting for requirements includes: determining a measurement period in a serving cell for the cell selection or cell re-selection (T1), wherein the measurement period is determined based on a number of consecutive Discontinuous Reception (DRX) cycles; determining a number of measurement occasions configured with a Discovery Reference Signal (DRS) in the serving cell during T1; determining availability of the DRS at the measurement occasions; and performing measurement based on availability of the DRS at the measurement occasions during T1. In this way, a wireless device may operate in NR RRC_IDLE / RRC_INACTIVE in the presence of CCA, e.g., Listen-Before-Talk (LBT).

For example, a first access point (AP) may be configured to: determine a joint restricted target wake time (r-TWT) service period (SP) for multi-AP (M-AP) operation with a second AP over a wide channel bandwidth (BW) including a primary channel of the first AP and a primary channel of the second AP; to obtain a transmit opportunity (TxOP) on at least the primary channel of the first AP, the TxOP covering at least the start of the joint r-TWT SP; suppressing transmission on a wide channel, BW, during a first predefined time period from the beginning of the joint r-TWT SP; and transmitting the M-AP trigger frame on the wide channel BW based on a determination that a clear channel assessment (CCA) state of a primary channel of the second AP is idle during the first predefined time period for a duration of the second predefined time period.

Methods and apparatuses for control of measurements are disclosed. According to an embodiment, a terminal device obtains (202) information about at least one relaxed measurement criterion, RMC. The terminal device determines (204) whether first criteria associated with a first mode of operation, MO, or second criteria associated with a second MO are satisfied, based at least on the obtained information. Measurements under the first MO are less stringent than measurements under the second MO. At least one criterion in at least one of the first criteria and the second criteria is associated with a result of clear channel assessment, CCA, procedure in at least one cell. The terminal device uses (206) a result of the determination for performing one or more operational tasks.

The invention discloses a code rate self-adaption method and system based on a Polar code, and relates to the technical field of communication. The code rate self-adaption system based on the Polar code comprises a channel state data acquisition module, a code rate self-adaption module and a code rate self-adaption module, the channel monitoring module is used for acquiring and comprehensively analyzing channel state data in real time and analyzing a channel state set, the channel evaluation module is used for analyzing a channel comprehensive quality evaluation index based on the channel state set, and the code rate control module is used for adjusting a coding rate based on the channel comprehensive quality evaluation index. The channel quality can be accurately evaluated and the coding rate can be dynamically adjusted according to the comprehensive quality evaluation index of the channel, such as the signal-to-noise ratio, the bit error rate, the transmission distance, the environmental data and the receiving state of the receiving end, and the flexible self-adaptive adjustment mechanism enables the system to automatically optimize the transmission scheme according to the real-time wireless channel change, so that the transmission efficiency is improved. And the problem of possible low efficiency of a traditional static system in different environments is avoided.

The invention discloses a modulation parameter adjustment method, relates to the technical field of frequency modulation, and aims to solve the problem that the communication quality and reliability of a communication system are affected due to poor modulation accuracy of the frequency of the communication system. Comprising the steps that signal quality information, channel capacity and environment information are collected, the signal quality information comprises the signal-to-noise ratio, the bit error rate and the frequency offset, and the environment information comprises the environment temperature value, the environment humidity value and the electromagnetic interference frequency; determining the channel quality according to the signal-to-noise ratio, the bit error rate, the frequency offset and the channel capacity; comparing the environment information with standard environment information to obtain a comparison result, and determining whether the environment information affects channel quality according to the comparison result; if it is determined that the environmental information affects the channel quality, determining an influence parameter according to the environmental information, and determining a channel evaluation parameter through the influence parameter and the channel quality; and determining whether to adjust the carrier frequency modulation parameter according to the channel evaluation parameter.

The present disclosure relates to a user equipment (UE) and base station (BS) involved in an improved physical random access channel, PRACH, transmission. The UE configures, based on a received unlicensed channel access configuration, symbols of an occupancy time of the respective unlicensed channel for uplink communication; receives an indication of a timing of channel resources which are to be used for a PRACH transmission; determines whether or not the indicated timing of channel resources is included within the symbols configured for uplink communication; if successful, performs a clear channel assessment, CCA, for a gap duration before the start of the indicated timing of channel resources which are to be used for the PRACH transmission; and if successful, transmits a random access, RA, preamble within the symbols configured for uplink communication at the indicated timing of channel resources which are to be used for the PRACH transmission.

Methods performed by a wireless device and a base station for adapting maximum allowed Clear Channel Assessment (CCA) based on operational occasion periodicity are provided. In examples disclosed herein, a wireless device is configured to determine an operational occasion periodicity of a signal that is subject to CCA. Accordingly, the wireless device can determine an association at least between the determined operational occasion periodicity and a maximum number of allowed CCA failures for communicating the signal. The wireless device can then perform one or more operational tasks based on the determined maximum number of allowed CCA failures. By determining the maximum number of allowed CCA failures, the wireless device can obtain information about downlink CCA failures and use the obtained information for adapting measurements procedures in serving cell operational tasks.

In a Wireless Local Area Network system, a reception STA can receive a request to send (RTS) frame. The RTS frame may include bandwidth information. The reception STA can perform clear channel assessment (CCA) on the basis of the bandwidth information. The reception STA can determine a transmission channel on the basis of the result of the CCA and information about preset multiple resource units (MRUs). The reception STA can transmit a clear to send (CTS) frame through the transmission channel. The transmission channel is one of the preset MRUs and may be a channel in which the CCA result is idle. The preset MRUs may include a first MRU composed of a first 996 tone RU, a second 996 tone RU, a third 996 tone RU, and a 484 tone RU.

A method and apparatus may be used to support coordinated and cooperative sectorized transmissions. Power control and clear channel assessment for sectorized transmissions may be used, along with sectorized beacon and associated procedures. Transmissions in a network may be protected by a first access point (AP) sending an omni-directional transmission and a beamformed or sectorized transmission to a station (STA), an overlapping basic service set (OBSS) confirming a spatially orthogonal (SO) condition based on the omni-directional transmission, and a second AP monitoring the omni-directional transmission and confirming the SO condition. The STA may be configured to receive a request-to-send (RTS) frame indicating data is available for transmission, and transmit a cooperative sectorized (CS) clear-to-send (CTS) frame indicating an ability for multiple AP reception.

Systems, methods, and apparatuses disclosed herein can operate on an unlicensed spectrum. These systems, methods, and apparatuses can perform a Clear Channel Assessment (CCA) to detect transmissions within the unlicensed spectrum. Thereafter, these systems, methods, and apparatuses can transmit, in response to the unlicensed spectrum being clear of transmissions, one or more first symbols within an uplink (UL) burst portion of a frame structure. The frame structure can include a downlink (DL) burst portion and the UL burst portion separated by gap. These systems, methods, and apparatuses can receive one or more second symbols within the DL burst portion.

Various aspects of the present disclosure relate to a user equipment (UE) that acquires, from a base station, a sidelink (SL) grant that includes a channel occupancy time (COT) for part of an unlicensed spectrum allowing the acquiring UE to transmit SL control and data information to a secondary UE. The acquiring UE can also share the COT with the secondary UE, allowing the secondary UE to transmit SL control and data to the acquiring UE or another UE. The acquiring UE performs clear channel assessment (CCA) on one or more SL resources associated with the SL grant. The UE returns an SL hybrid automatic repeat request (HARQ) feedback to the base station based at least in part on a status of the CCA.

The present application relates to the technical field of communications, and discloses a communication method and apparatus, a terminal device, and a network device. In the present application, the resource type of a measurement resource associated with CSI reporting is indicated / configured by means of first information. Since measurement results of the CSI reporting are obtained on the basis of the measurement of measurement resources associated with the CSI reporting, when the measurement resources associated with the CSI reporting belong to one resource type, the measurement results of the CSI reporting can independently reflect one resource type. In this way, after a network device obtains the measurement results, the network device can independently perform accurate channel assessment or interference assessment on one resource type, so as to adapt to a scenario where the network expects to perform channel assessment or interference assessment on only one resource type.

A wireless transmit / receive unit (WTRU) comprises a processor configured to receive a configuration of channel correlation measurements from a network. The configuration may be associated with an aggregation group. The processor may detect a trigger to perform the channel correlation measurements, determine one or more WTRUs associated with the aggregation group to perform the channel correlation measurements, send a request to perform the channel correlation measurements to each WTRU of the one or more WTRUs associated with the aggregation group, receive a response from at least one WTRU of the one or more WTRUs associated with the aggregation group, determine a correlation of the channel correlation measurements performed by the one or more WTRUs in the aggregation group, and send a reporting message to the network or the at least one WTRU of the one or more WTRUs.

A wireless network device configured to monitor multiple channels for clear channel assessment (CCA) is disclosed. The receiver circuit of the network device comprises at least one CCA block, which is used to indicated whether a particular channel is clear. In certain embodiments, the network device checks each channel sequentially, and if both channels are free, transmits at least one packet. The at least one packet may include a MODE SWITCH packet and a second packet sent using the new PHY mode. The network device may also have multiple CCA blocks. In this scenario, the channels may be checked concurrently, and if both channels are free, the network device transmits at least one packet. Alternatively, the network device monitors multiple channels concurrently and selected one of the channels on which to transmit a preferred PHY mode, thereby avoiding the need for a MODE SWITCH packet.

Embodiments of a user equipment (UE) configurable for unlicensed band operation in a 5G NR system (5GS), when operating in semi-static channel access mode, for a UE-initiated channel-occupancy time (COT), is configured to transmit an uplink (UL) transmission burst, as an initiating device, starting at a beginning of fixed frame period (FFP) and ending at a symbol before an idle period of the FFP after a successful clear-channel assessment (CCA).

The invention discloses a robot communication control system and method based on a core control module, and relates to the technical field of communication control. The method comprises the following steps: acquiring tasks to be processed in a working area, dividing the tasks into different priorities, acquiring distribution coefficients of different tasks to be processed in combination with equipment information of a robot, performing task distribution on the different tasks to be processed, acquiring a channel evaluation coefficient of the robot, and performing channel optimization on the channel evaluation coefficient. The method comprises the following steps: acquiring a communication topological graph in a working area and topological coefficients of different robots, performing topological reconstruction on the communication topological graph by utilizing the topological coefficients, acquiring predicted topological coefficients of the different robots, and performing topological pre-reconstruction on the robots by utilizing the predicted topological coefficients; the flexibility of task allocation can be effectively improved, and the communication connection conditions of different AGVs and mechanical arms can be dynamically adjusted in combination with multiple influence factors.

The invention relates to the technical field of wireless communication, and discloses a wireless audio transmission dynamic carrier density and power adjustment method based on QoS (Quality of Service), which comprises the following steps of: acquiring channel information in a network in real time through wireless equipment, including signal strength, channel quality, user distribution, interference strength, mobility information and the like; and the channel state of the current network is evaluated through the channel evaluation module, the network load is predicted through the deep learning model based on historical data (including network traffic, QoS indexes, user activities, equipment performance and the like), and the future network state and demand change are calculated. The network load change is predicted through machine learning, the complex real-time calculation requirement in a traditional method is reduced, the calculation burden of a system is reduced, an intelligent power control mechanism can dynamically adjust the transmission power according to the actual network requirement, too high power consumption is avoided, the service life of a battery of wireless equipment is prolonged, and the method is particularly outstanding in low-power-consumption equipment.

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.

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.

In a wireless local area network (WLAN) system, an STA performs CCA on resources allocated thereto via a trigger frame from an AP and can transmit a TB PPDU via an idle channel among the allocated resources on the basis of the result of the CCA, wherein the PHY of the TB PPDU may include information about the result of the CCA.