Abstract: This disclosure describes implementations of a modified ARQ/HARQ procedure that deviates from normal wait-and-stop ARQ/HARQ procedure. In particular, a series of messages to be transmitted may be organized in a predetermined number of message groups. By using various control parameters, the different groups of messages may be independently transmitted without having to wait for acknowledgement of another group of messages. In addition, within each of the message groups, the receiving device is allowed to store and hold acknowledgement of messages until a later time specified through control messages. A control message may trigger transmission of stored acknowledgement for one or more message groups identified. Multiple pending acknowledgements of multiple groups of messages may be triggered and subsequently transmitted in a single acknowledgement message. The pending acknowledgements may include acknowledgements for successful receipt of both initially transmitted message and retransmitted message.

Abstract: Provided are a method and apparatus for sending and receiving feedback information, and a storage medium. The method includes: receiving service data sent by a user equipment (UE); and sending downlink feedback indication (DFI) information corresponding to the service data to the UE. Where the DFI information includes a HARQ ACK/non-acknowledgement NACK indication, and the HARQ ACK/NACK indication is configured for indicating a decoding result of a transport block (TB) and/or a code block group (CBG) in the service data decoded by a base station.

Abstract: A contention window adjustment includes: determining, according to a type parameter, an access level of channel access performed by a base station at a second moment, where the type parameter is used for indicating a type of transmitted data during the base station performing the channel access at the second moment; and adjusting, according to the access level and an adjustment parameter, a size of a contention window corresponding to the second moment, where the adjustment parameter includes a first adjustment ratio, a first frequency domain position where the base station performs channel access at a first moment, and a second frequency domain position where the base station performs the channel access at the second moment.

Abstract: This disclosure relates generally to wireless communications. In one embodiment, a method performed by a communication device includes: receiving information from a first communication node; and decreasing a probability of selecting a second communication node, in communication node selection or reselection, in response to the information indicating a condition.

Abstract: Provided are a transmission channel configuration method and apparatus, a transmission channel sending method and apparatus, a device and a storage medium. The transmission channel configuration method includes sending resource configuration information to a user equipment and receiving the transmission channel according to the resource configuration information. The resource configuration information includes time-domain resource information, frequency-domain resource information and space direction information, and the resource configuration information is used for configuring the sending mode of a transmission channel of the user equipment.

Abstract: Provided are a codebook feedback method, a codebook feedback apparatus, a device, and a storage medium. The codebook feedback method includes: triggering, according to control information (CI), a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook of a data channel group to perform feedback, where the CI includes at least one of: information of new feedback indication (NFI) corresponding to one or more data channel groups, a data channel group identifier and a group index corresponding to a currently scheduled data channel, or, a total downlink assignment index (T-DAI) corresponding to one or more data channel groups.

Abstract: Provided are a data transmission method and apparatus, a data transmission method and apparatus. The method includes: acquiring predefined information; determining, according to the predefined information, whether to perform a listen-before-talk (LBT) mechanism before transmission; and upon the predefined information carrying LBT indication information, performing the LBT mechanism before a transmission device performs the transmission; or upon the predefined information not carrying the LBT indication information, not performing the LBT mechanism before the transmission device performs transmission. For one transmission device, a relationship between a transmit beam and a receive beam includes: the receive beam being the same as the transmit beam; or the receive beam being different from the transmit beam.

Abstract: Provided are a beam training method, a first node, a second node, a communication system, and a medium. In this method, the near-field code word of each of multiple sampling point pairs is constructed according to the array response vector of the near-field cascaded channel of a reconfigurable intelligent surface (RIS). Each sampling point pair includes one first sampling point and one second sampling point. The first sampling point is a candidate location of a scatterer between a first node and the RIS. The second sampling point is a candidate location of a scatterer between the RIS and a second node. A training symbol is sent through the RIS according to the near-field code word of each sampling point pair. Feedback information is received. The feedback information includes the information of an optimal beam.

Abstract: Techniques for interference mitigation in a wireless communication system are disclosed. One example method includes receiving, at a first communication node, interference status information indicative of a remote interference between the first communication node and a second communication node and performing, by the first communication node, subsequent communications to the second communication node by implementing a backoff based on a granularity.

Abstract: Methods, apparatus and systems for transmitting signal and channel information in a wireless communication are disclosed. In one embodiment, a method performed by a wireless communication node is disclosed. The method comprises: determining a first time domain position associated with a transmission of a first block according to a first configuration; and transmitting a second block at the first time domain position according to a second configuration, wherein the second configuration is different from the first configuration.

Abstract: Provided are a transmission method and apparatus, a device, a system and a storage medium. The transmission method includes: allocating to-be-transmitted information to at least one resource subset of a target transmission resource, where the target transmission resource is divided into a plurality of resource subsets; and transmitting corresponding to-be-transmitted information on the allocated at least one resource subset.

Abstract: Provided by embodiments of the present disclosure are downlink monitoring and transmission methods and devices, a communication system, a terminal and a base station. The terminal has two different monitoring opportunity strategies for slots in a channel occupancy term (COT). The terminal can switch the monitoring opportunity strategy for downlink monitoring from a first monitoring opportunity strategy to a second monitoring opportunity strategy according to a switching triggered received from a base station.

Abstract: A system and method of terminating any pending listen-before-talk (LBT) attempts after they have been submitted to the physical layer of a system interconnection model if one or more of the LBT attempts succeed. The system and method include receiving a plurality of frequency resources, each of the plurality of frequency resources corresponding to a respective resource occasion. The system and method include performing, for each of the frequency resources, a listen-before-talk procedure in a first layer of an open system interconnection model. The system and method include indicating, to a second layer of the open system interconnection model, a first one of the plurality of frequency resources that succeeded in the respective listen-before-talk procedure.

Abstract: A method and apparatus for performing a random access (RACH) procedure is disclosed. In one embodiment, a method performed by a wireless communication node, includes: performing a plurality of random access (RACH) procedures with a wireless communication device on a first frequency resource set and a second frequency resource set, wherein the plurality of RACH procedures each comprises: receiving a first message on a first frequency resource from the wireless communication device, wherein the first frequency resource is selected from the first frequency resource set; transmitting a second message on a second frequency resource to the wireless communication device within a pre-determined time window, wherein the second frequency resource is selected from the second frequency resource set; receiving a third message on the first frequency resource from the wireless communication device; and transmitting a fourth message on the second frequency resource to the wireless communication device.

Abstract: A system and method for channel access in licensed and unlicensed spectrums are disclosed herein. In one embodiment, a method performed by a communication node, includes: detection of an idle channel associated with a communication device after performance of a channel access procedure; transmitting an initial signal after the detection of the idle channel, wherein the initial signal configures a communication device to start detecting a control channel; and transmitting a control signal using the control channel to the communication device after the transmitting the initial signal.

Abstract: A method of wireless communication includes selecting, based on a field in a message received by a wireless device, an access procedure mode for accessing a wireless network upon occurrence of a condition and performing, by the wireless device upon occurrence of the condition, the access procedure according to the access procedure mode for accessing the wireless network. In some embodiments, the disclosed techniques may be used to improve the performance of a wireless network by reducing number of listen-before-talk attempts that devices have to make before successfully accessing the wireless network.

Abstract: Provided are an information transmission method, apparatus and device. The method includes that a device performs an information transmission on configured resources.

Abstract: Methods, systems, and devices related to digital wireless communication are described. An illustrative method of wireless communication includes receiving information regarding uplink transmission. The information includes multiple transmission resources scheduled by control information and multiple candidate starting locations in the multiple transmission resources. The method further includes performing a channel access procedure at one of the multiple candidate starting locations, and in response to a result of the channel access procedure, transmitting data via the transmission resources.

Abstract: Methods, apparatus and systems for indicating transmission failures in a wireless communication are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: obtaining, by a first layer module of the wireless communication device, an indication from a second layer module of the wireless communication device. The first layer module is configured for performing a process at a first layer. The second layer module is configured for performing a process at a second layer that is different from the first layer. The indication indicates whether there is a transmission failure of the wireless communication device at the second layer.

Abstract: Provided are a method and apparatus for occupying an unlicensed carrier to send a discovery signal, and an access point. The method includes the following steps. A parameter of a discovery signal sent on an unlicensed carrier by an access point is configured. The access point sends the discovery signal on the unlicensed carrier. The technical solution of the present disclosure can reduce the time for processing items other than data sending (such as synchronization) after each time the access point preempts a resource, and can improve the spectral efficiency of the unlicensed carrier.