135 results about "Channel access method" patented technology

Methods, systems, and devices for wireless communication are described. An access point (AP) and a station (STA) may utilize a primary primary sub-channel (M primary channel) and an opportunistic primary channel (O primary channel) according to one or more rules. For example, the AP and the STA may align transmit opportunity (TXOP) boundaries across the O primary channel and the M primary channel such that transmission or reception on the O primary channel does not extend beyond (or end prematurely) relative to TXOP on the M primary channel. To facilitate such boundary alignment, the AP and STA may perform an initial frame exchange indicating a remainder of a duration of a current TXOP on the M-master (thereby facilitating alignment of an end boundary of a new TXOP on the O-master). The initial frame exchange may include an initiation frame and a response frame, and may be initiated by the AP or the STA.

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.

A channel access method for sidelink (SL) communication by a user equipment (UE) includes accessing, by the UE, a channel for SL transmission based on a reference duration, wherein the reference duration has a duration starting from a beginning of a channel occupancy until an end of a first slot of a first type of physical sidelink shared channel (PSSCH) transmission, or until an end of a first type of PSSCH transmission burst, or until an end of a second type of PSSCH transmission burst.

Channel access in unlicensed spectrum may be a function of the type of physical channel and / or a procedure that initiated a transmission. An LBT procedure may be performed as a function of beam management. A WTRU may access a channel using multiple channel access methods associated with multiple uplink transmissions based on a determination of persistent interference associated with the channel. Channel access methods may be performed with different parameters or characteristics based on the resource type / timing of the transmission / measurements of DL / UL RS. Channel access methods may be characterized by a sensing duration, an ED threshold, a beam width, and / or a beam direction. Different ED thresholds may be applied as a function of one or more characteristics of an applicable beam. Multiple sensing methods and / or related parameters may be applied as a function of the type of physical channel and / or the type of procedure associated with a transmission.

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 base station of a wireless communication system is disclosed. The base station of wireless communication includes a communication module and a processor. The processor is configured to receive a grant for scheduling a plurality of uplink transmissions from the base station, and when the UE attempts to a first fixed duration-based channel access for a first transmission which is one of the plurality of uplink transmission and fails in the first fixed duration-based channel access, attempt to a second fixed duration-based channel access for a second transmission which is a transmission following the first transmission.

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 present disclosure relates to a channel access method for performing transmission in an unlicensed band and an apparatus using the same. A base station of a wireless communication system is disclosed. A wireless communication base station includes a communication module and a processor. The processor is configured to receive a grant from a base station to schedule a plurality of uplink transmissions, and to schedule the plurality of uplink transmissions when the UE attempts a first fixed duration-based channel access for a first transmission as one of the plurality of uplink transmissions and fails in the first fixed duration-based channel access. A second fixed duration-based channel access is attempted for a second transmission as a transmission following the first transmission.

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.

The invention relates to the technical field of communication, in particular to a channel access method, a communication method, a terminal and a storage medium, and the channel access method comprises the following steps: triggering a channel access process for a plurality of channels in an unlicensed frequency band based on first transmission of a direct link; and determining a multi-channel access mechanism for accessing the plurality of channels according to a second transmission after the first transmission. According to the invention, when the terminal needs the first transmission and then carries out the second transmission, the terminal can comprehensively consider the first transmission and the second transmission, thereby reasonably determining the multi-channel access mechanism for accessing a plurality of channels, and carrying out the multi-channel access based on the determined multi-channel access mechanism. And the technical problem that the multi-channel access delay is relatively large can be avoided as much as possible.

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.

The invention discloses a self-adaptive channel access method for an ad hoc network of an unmanned aerial vehicle, relates to the technical field of wireless communication, and realizes channel selection and dynamic adjustment of contention windows by combining a multi-channel multi-contention window mechanism with deep reinforcement learning. Specifically, each unmanned aerial vehicle node initializes contention window values of a plurality of channels, and dynamically selects an optimal channel in a data transmission stage according to a channel busy / idle rate and contention window popularity. In a data retransmission stage, a contention window value is adjusted through a dual-depth Q network to minimize conflicts and optimize network performance. The state space comprises a self contention window, a local channel busy / idle rate, a neighbor average channel busy / idle rate and contention window popularity, and the award function comprehensively considers throughput, fairness and the average channel busy / idle rate. Experimental results show that compared with a traditional protocol, the method has the advantages that key performance indexes such as throughput, time delay and fairness are remarkably improved, and the method is particularly suitable for high-dynamic communication scenes such as unmanned aerial vehicle cluster cooperation and the Internet of Vehicles.

Embodiments of the present application provide a channel access method. The method comprises: sending a first physical sidelink feedback channel (PSFCH) to a second terminal, wherein the first PSFCH is used for instructing the second terminal to access a channel in a channel access mode of a specified type so as to use a reserved resource of the second terminal. In this way, the possibility of the second terminal accessing the channel in the channel access mode of the specified type can be improved; when the second terminal accesses the channel in the channel access mode of the specified type, the second terminal does not need to execute channel access of type 1; because the energy loss of the channel access process of the type 1 is high, the method is beneficial to reducing the energy loss of the second terminal executing channel access.

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.

The invention provides a wireless communication method and terminal equipment. The method comprises: a terminal device determines to transmit first sideline data on a shared spectrum based on a first channel access mode and / or a second channel access mode, the first channel access mode being different from the second channel access mode, and the first sideline data being transmitted on the shared spectrum; the first channel access mode and the second channel access mode are channel access modes for monitoring the shared spectrum before the first sideline data is sent on the shared spectrum, and the possibility that the terminal equipment transmits the sideline data on the shared spectrum is improved.

Channel access methods and apparatuses, and a communication device and a storage medium, which belong to the technical field of wireless communications. A channel access method is executed by a station device, the station device being a zero-power-consumption device. The method comprises: performing channel access in an unlicensed spectrum by means of a first access category (501), wherein the first access category is one of at least one second access category corresponding to a zero-power-consumption device.

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 present invention relates to the field of mobile communication technology, and specifically discloses a wireless self-organizing network channel access method based on node classification. In combination with the network classification results of network terminal nodes, the maximum multiplexing structure of access (beacon), priority reservation, reservation, reply and hierarchical cyclic data time slots is adopted in the TDMA frame structure, so that the self-organizing network is vertically conflict-avoided by network classification and horizontally by reservation application to solve the hidden terminal problem; in terms of control overhead, a reservation is adopted to occupy multiple time slots, and the data time slot is divided by data subframes and network levels to effectively improve the utilization rate of time slot resources; in the channel access algorithm, the influence of node service level on channel access probability is considered, and priority reservation time slots are divided to meet the differentiated service quality requirements of different terminal services. The method can effectively improve the utilization rate of wireless self-organizing network channel resources, avoid frequent conflicts of data of each terminal node, and meet the low latency requirements of the network.

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.