98 results about "Channel access method" patented technology

Provided are a channel access method and apparatus and a communication device. The method includes: a first device sends a first frame, the first frame comprising a first field, and the first field being used for indicating a channel occupancy time of a first channel; the first field is used for a second device to set or update a network allocation vector (NAV), and the NAV is used for the second device to determine a busy time of the first channel; all or part of the channel occupancy time is used for a first type of devices or a third device to perform communication on the first channel, and the third device belongs to the first type devices.

The embodiment of the invention discloses a communication method and device, and the method comprises the steps: an access point transmits a transmission opportunity TXOP initial control frame to a station after switching from a non-main channel to a main channel in a non-main channel access mode; and performing channel access based on whether the acknowledgement frame is received or not. By adopting the embodiment of the invention, the communication interference caused by the change of the OBSS TXOP on the main channel is avoided, the time for restarting normal channel competition after switching from the non-main channel to the main channel is opportunistically shortened, and the communication efficiency is improved.

Provided are a channel access method and a communication device, the method comprising: determining backoff time information on the basis of the length of a first time unit, the backoff time information indicating a first duration for a first device to execute backoff, the length of the first time unit being greater than or less than the length of a time slot; and executing a back-off process according to a channel state of a first channel and the back-off time information, the first channel being used for transmitting data of the first device after the back-off is finished. The backoff duration of the second device is determined based on the length of the time unit whose length is greater than or less than the length of the time slot, so that the probability of air interface collision between the first device and other devices in the network can be reduced, and the data transmission delay can be reduced.

A channel access method over an internet of things (IoT) interface. The device receives a trigger signal from a network node and determines, based on information carried in the trigger signal, whether to transmit a message carried in a first device-to-reader IoT signal to the network node upon receiving the information carried in the trigger signal. The device transmits the message carried in the first device-to-reader IoT signal to the network node if the determination is positive. The device receives a first reader-to-device IoT signal from the network node in response and determines whether to transmit a message carried in a second device-to-reader IoT signal to the network node based on information carried in the first reader-to-device IoT signall. The device transmits the message carried in the second device-to-reader IoT signal to the network node if the determination is positive and determines reception of the message by the network node.

A terminal includes: a control unit configured to assume that there are a scheduling cell and a scheduled cell in multi-carrier scheduling by single control information; and a reception unit configured to receive the single control information from the scheduling cell. The reception unit receives a plurality of scheduled cells based on the single control information, and, in a case where the plurality of the scheduled cells include an unlicensed frequency cell, the control unit determines an applicable multi-channel access method or determines an applicable operation related to Type 2 HARQ (Hybrid automatic repeat request) codebook.

Methods, systems, apparatuses, and computer program products for enhancing prioritized traffic exchange using enhanced distributed channel access are disclosed herein. In an implementation, one or more prioritized access parameters to be utilized for data traffic that satisfies at least one priority criterion for accessing a data channel are received, a transmission opportunity for one or more data frames via the data channel is obtained based on the one or more prioritized access parameters, and the one or more data frames are transmitted via the data channel.

A channel access method is provided. A user equipment (UE) obtains a configuration of a plurality of Physical Uplink Shared Channel (PUSCH) opportunities for PUSCH transmission within a configuration grant period of a configuration grant (CG) configuration. The configuration grant configuration includes information for reporting PUSCH occasion indications that are not used within the configuration grant period. The user equipment determines a hybrid automatic repeat request (HARQ) process identification (ID) for a valid PUSCH occasion within the configuration grant period. And the user equipment transmits first uplink control information (UCI) in the PUSCH on a first valid PUSCH occasion which is not unused, the first valid PUSCH occasion is associated with the determined HARQ process identifier, and the first UCI comprises an indication of a first group of PUSCH occasion which is not used.

The embodiment of the invention provides a channel access method and device and a storage medium. In the method, an access point sends first indication information and / or second indication information, the first indication information and the second indication information indicate whether a first station is allowed to access a first channel, a frequency band occupied by the first channel is a part of a frequency band occupied by a second channel, the second channel is a channel of a first BSS, and the first BSS is a BSS to which the first station belongs; and when a first preset condition is satisfied, the first station tries to access the first channel according to the first indication information or the second indication information. And the access point flexibly indicates whether the first station can access the non-main channel or not through the first indication information and / or the second indication information.

A channel access method and a communication apparatus. The method can be applied to WLAN systems supporting IEEE 802.11ax next-generation Wi-Fi protocols such as 802.11be, Wi-Fi 7 or EHT, and 802.11 series protocols such as 802.11be next-generation and Wi-Fi 8, and can also be applied to UWB-based wireless personal area network systems and sensing systems. In the method, a first station can send a latency signal, so that an opportunity for prioritized channel access can be obtained, thereby reducing channel access latency. In addition, the first station can further perform first backoff before sending the latency signal, thereby reducing the impact of sending latency signals on channel access of conventional devices. In conclusion, the solution can achieve a balance between latency performance and fairness.

This disclosure provides a random access method over an Internet of Things (IoT) interface for Ambient IoT (A-IoT) devices with backscatter-enabled device-to-reader signal transmission. An A-IoT device receives a trigger signal from a network node, determines a resource location for a first device-to-reader IoT signal, transmits it, receives a first reader-to-device IoT signal, and decides whether to transmit a second device-to-reader IoT signal based thereon. The method supports contention-based or contention-free access, TDMA-or FDMA-based multiplexing, and handles failures with re-access mechanisms. It enables deployment of ultra-low-power A-IoT devices, realizes key use cases like inventory and commands, reduces maintenance costs, and ensures 3GPP coexistence.

The invention discloses a wireless communication device and a non-primary channel access method for the wireless communication device. The device detects a first physical layer protocol data unit (PPDU) on a primary channel. The device determines whether the first PPDU is an internal basic service set (BSS) transmission and is not for itself. If both conditions are satisfied, the device initiates a non-primary channel access NPCA procedure to enable the device to communicate on an idle non-primary channel by transmitting or receiving a second PPDU, thereby avoiding contention on a busy primary channel.

A communication apparatus capable of performing communication using a first channel access method using at least a primary channel in one link and a second channel access method using at least a secondary channel in one link in a busy state in which the primary channel is in a busy state. Using at least one non-primary channel different from the primary channel among the plurality of channels included in the link instead of using the primary channel; notifying another communication device having a function of performing communication using the second channel access method of first information, the first information being usable by the another communication device to determine whether or not communication using the second channel access method is allowed; and communicating with the other communication device that has received the first information.

This invention provides a channel access method and related apparatus for a non-STR (Simultaneous Transmit / Receive) MLD (Multi-Link Device) that improves channel access efficiency when the MLD is in a blind / self-interfering state. [Solution] A method applicable to a wireless local area network supporting the IEEE 802.11be standard, comprising the step that if the length of a first PPDU transmitted by the first MLD over a first link is less than or equal to a first value, the first MLD skips starting the medium synchronization delay timer with respect to the second link, and the first MLD is not permitted to perform simultaneous transmission and reception on the first and second links. Channel access efficiency can be improved when a non-STR MLD is in a blind / self-interfering state.

This application discloses a channel access method and system for UAV local line inspection tasks, relating to the field of wireless communication. The method includes: classifying the data to be transmitted by communication nodes according to service requirements when the UAV is performing a local line inspection task; continuously sensing the occupancy status of the wireless channel; arbitrating the continuous idle state of the wireless channel based on the service classification result and the sensed channel state indication function, and determining whether the wireless channel meets the access conditions based on a continuous idle determination threshold; if it meets the conditions, generating a random backoff time corresponding to the current service priority according to the upper limit of the backoff window, and performing backoff counting; after the backoff counting is completed, if the pre-transmission review result of the wireless channel state indicates that the wireless channel is in an idle state, transmitting the data to be transmitted corresponding to the current service priority to the wireless channel. This application can improve the access timeliness and link continuity of high-priority C2 services.

A user equipment (UE) executes a semi-static channel access method during a random access procedure in an unlicensed band. A base station transmits configuration information and downlink (DL) information to the UE in a fixed frame period (FFP) according to a set of FFP parameters associated with the base station. The UE determines whether to initiate a channel occupancy time (COT) in an FFP according to a set of FFP parameters associated with the UE based on one or more of: at least one condition in the configuration information, at least one condition in scheduling information, at least one condition in DL information, and a detection result of detecting transmission of the DL information. The base station determines whether to use the UE-initiated COT shared from the UE.

The application provides a multi-channel access modeling and distributed implementation method considering service priority, a general buffer queue model considering service priority classification is used, a new network benefit maximization constraint optimization model is established by combining the characteristics that different priority services transmitted by the same wireless resource have different benefits to the whole network, the model is converted into a Multi-agent reinforcement learning decision process, a deep learning framework of multi-link distributed dynamic channel access based on the model is constructed, all Agents are centrally trained by using the optimization target of the established model as a reward, and a corresponding distributed dynamic channel access method is obtained, and the Agents trained by the deep learning framework are loaded into the link transmitters for distributed execution, so that the dynamic spectrum access decision with the global service priority balance effect can be realized by using only the local observation of each link.

Methods and apparatuses for initiating channel occupancy in a semi-static mode SL channel access in a wireless communication system. A method of a user equipment (UE) includes receiving, from a higher layer, an indication on a semi-static mode SL channel access, receiving a set of configurations for the semi-static mode SL channel access, including a duration of a period and determining a first portion of the period as a channel occupancy associated with the period. The method further includes determining a second portion of the period as an idle duration associated with the period, performing a SL channel access procedure in the idle duration associated with the period, and transmitting a first SL transmission over a channel in the channel occupancy associated with the period after successfully performing the SL channel access procedure.

Embodiments of the present invention relate to a channel access method, a communication device, and a communication system. The channel access method comprises: upon sensing the presence of transmission of an OBSS physical layer protocol data unit (PPDU) in a primary channel, a first device setting a first NAV timer of the primary channel on the basis of a transmission duration of the OBSS PPDU, and switching to a secondary channel; upon sensing that the secondary channel is busy, setting a second NAV timer of the secondary channel; and on the basis of respective corresponding durations of the first NAV timer and the second NAV timer, determining, by sensing, to access the primary channel or the secondary channel for PPDU transmission. In embodiments of the present invention, NAV timers of a primary channel and a secondary channel are maintained, and the timing for channel access is determined on the basis of durations of different NAV timers of the primary channel and the secondary channel, thereby reducing a channel access delay, and satisfying UHR transmission requirements.

The application provides a non-primary channel access method and related device in a wireless local area network, and relates to data communication between an AP and one or more STAs, and is also applicable to communication between APs and communication between STAs. The application improves the consistency of switching to a slave channel when the AP and the STA perform NPCA, that is, the AP is prevented from working on the primary channel and the STA is switched to work on the slave channel. Therefore, the number of retransmissions is reduced, the packet loss rate of transmission is lowered, and the service quality is improved.

The invention provides an improved Q-learning channel access method based on a composite reward function, and belongs to the technical field of communication. Comprising the following steps: an initialization algorithm: deploying sensor nodes and gateways, clustering and selecting cluster heads from nodes in clusters; locally initializing nodes, maintaining a Q table and a neighbor table by each node, and defining a state space, an action space, an initial parameter and a competition intensity threshold value; each node executes actions and observes in the current state, when a conflict does not pass in the data sending process, a composite reward participating in Q value updating is calculated, layered Q value updating based on the competitive strength level is firstly carried out after updating to the next state, a neighbor table is updated by the node in the Texchange period, and the neighbor table is updated by the node in the Texchange period; and in the Tcluster period, the weighted average Q value in the cluster is calculated by the cluster head and is broadcasted, and after the cluster member updates the local Q table, the action is executed and the observation is carried out in the next state until the conflict is solved and the node information is successfully sent. According to the method, the conflict probability in a high-competition environment can be effectively reduced, and the channel access efficiency is improved.

To provide a channel access method for a multi-link device and a related apparatus, being applied to a wireless local area network.SOLUTION: The method includes: when a length of a first PPDU transmitted on a first link by a first multi-link device is less than or equal to a first value, skipping starting, by the first multi-link device, a medium synchronization delay timer on a second link. The first multi-link device is not allowed to perform simultaneous transmitting and receiving on the first link and the second link. The method can improve channel access efficiency when a non-simultaneous transmitting and receiving multi-link device (non-STR MLD) is in a blind state / self-interference state.SELECTED DRAWING: Figure 5

The present application relates to the technical field of wireless fidelity, and relates in particular to a channel access method and a communication device. The method herein comprises: a first access point sends a management frame to a first device, the management frame comprising first indication information, the first indication information being used to indicate at least one first reserved resource that is allowed to be used competitively for a first service, and the at least one first reserved resource only comprising time-frequency resources reserved for the first service; then, the first device initiates channel access on the at least one first reserved resource and transmits the first service. Since the at least one first reserved resource is reserved exclusively for the first service, it is believed that another non-first service does not compete to use the at least one first reserved resource, which can increase the opportunities for the first service to access a channel. After each time the first device accesses a channel, the first service can be sent or the first service can be scheduled continuously in the at least one first reserved resource, thereby reducing the transmission delay of the first service.

The application discloses a kind of self-adapting channel access methods, specifically including the following steps: step 1, listening stage: the channel energy of unlicensed frequency band and service label are monitored, current service type is identified and service priority weight is distributed;Step 2, decision stage: calculate the preemption factor by dynamic energy detection threshold, judge whether to trigger channel preemption based on preemption factor;Step 3, access stage: after preemption succeeds, avoid conflict with other protocol signals by pre-distributing time slot code, and send data;Step 4, conflict prediction and backoff adjustment stage: predict the conflict probability based on LSTM model, carry out adaptive backoff window adjustment, and handle abnormal conditions according to abnormal handling mechanism.The application can make high-priority service preoccupy channel more quickly, while avoiding low-priority service to carry out invalid competition when channel quality is poor, improve spectrum utilization, while reducing conflict rate and delay.

The invention provides a semi-static channel access method in an unlicensed frequency band. In one embodiment, a user equipment (UE) receives a configuration of at least one set of fixed frame period (FFP) parameters, and upon activation of a semi-static channel access for a sidelink (SL) transmission, derives an initiator of a Channel Occupancy Time (COT) based on the set of FFP parameters, and, upon activation of the semi-static channel access for the sidelink (SL) transmission, deduces an initiator of the COT based on the set of FFP parameters. If at least one transmission condition is satisfied, the UE transmits a scheduled SL burst within the COT initiated by the derived COT initiator.

The present invention provides a method, device, and system for adjusting a contention window size for performing channel access. The method includes: receiving uplink scheduling information on the uplink transmission including a new data indicator (NDI) associated with a specific subframe in a first uplink transmission burst; determining a contention window size based on the NDI; generating a random number N (N≥0) in the determined contention window size based on the NDI associated with the specific subframe; and performing the uplink transmission on the specific cell after sensing a channel on the specific cell at least for N slots while the channel on the specific cell is idle. If the NDI is toggled, the contention window size is reset to a minimum value, and if the NDI is not toggled, the contention window size is increased to a next higher allowed value.

The present application relates to the field of wireless communications, such as applications in wireless local area networks supporting the 802.11be standard, and more particularly to a channel access method and related apparatus for a multi-link device. The method comprises: when the length of a first PPDU sent by a first multi-link device on a first link is less than or equal to a first value, the first multi-link device does not start a media synchronization delay timer on a second link, wherein the first multi-link device cannot transmit and receive simultaneously on the first link and the second link. By using the embodiments of the present application, the efficiency of channel access can be improved when a non-STR MLD is in a blind state / self-interference state.

A channel access method, a channel access apparatus and a non-transitory computer readable storage medium are provided. The method includes: Type2 channel access is performed on at least one first channel in a set of channels, wherein a channel access result obtained by performing Type2 channel access on the at least one first channel is used to determine whether the at least one first channel is available for transmitting a sidelink synchronization signal block (S-SSB) in a first slot, the set of channels are channels scheduled for transmitting the S-SSB in the first slot, and the at least one first channel and the first slot are included in a channel occupancy time (COT).