Abstract: A method and apparatus for acquiring uplink transmission timing advance and a communication system. The method includes: a network device obtains a timing advance command value (TA), the TA being related to a first reference subcarrier spacing (SCS) used by a terminal equipment for calculating timing advance (TTA); and the network device transmits a timing advance command (TA command), the TA command including the TA. Hence, the terminal equipment may be assisted in obtaining accurate timing advance of uplink transmission.

Abstract: A device and method for vehicle-to-vehicle communication. The method includes: a source device sends a request message to a base station, the request message being used for requesting the base station to allocating a resource; a node device that is synchronous with the source device sends synchronous information to at least one target device, so that the at least one target device establishes time synchronization with the source device according to the synchronous information, wherein the node device is a road-side device or an in-car device capable of communicating; the source device informs the at least one target device of a resource allocated by the base station; and the source device sends service information to the at least one target device by utilizing the resource.

Abstract: This disclosure provides a group communication apparatus and method and a communication system. The group communication method includes: scrambling data information of a message by using corresponding scrambling information according to a message type and/or a message transmission range; wherein, different message types and/or message transmission ranges correspond to different scrambling information. Therefore, internal members or peripheral devices of a group may selectively receive messages of different types or different target ranges. Hence, not only messages may be ensured to be accurately received by corresponding receivers, but also security of internal message may be improved.

Abstract: A data transmission apparatus includes a first transmitter. The first transmitter is configured to, when a first timer is running and a second timer is not running, transmit retransmission data according to a configuration grant corresponding to a first hybrid automatic repeat request (HARQ) process, and start the second timer if LBT is not failed for transmission of a transport block for the retransmission data, or, when the first timer is not running, transmit new data according to a configuration grant corresponding to the first HARQ process, and start the first timer and the second timer if LBT is not failed for transmission of a transport lock for the new data.

Abstract: A random access power control apparatus and method and a communication system. The random access power control apparatus includes: a first calculating unit configured to, by using a pathloss estimated based on an synchronization signal/physical broadcast channel block and/or a channel state information reference signal (CSI-RS) currently selected by a UE, calculate transmission power used by the UE in transmitting random access preambles. Hence, the UE may be adapted to UE random access procedures in such complex scenarios as multiple beams.

Abstract: Methods and apparatuses for transmitting and receiving an uplink signal. The method includes: receiving first indication information by a terminal equipment, the first indication information being used to indicate at least one semi-statically configured or semi-persistently scheduled time-frequency resource; receiving physical layer signaling, the physical layer signaling being used to indicate a first starting position within a time domain range of one or more time-frequency resource(s) in the at least one time-frequency resource; and transmitting an uplink signal starting from the first starting position on the one or more time-frequency resource(s).

Abstract: This disclosure provides a group communication apparatus and method and a communication system. The group communication method includes: scrambling data information of a message by using corresponding scrambling information according to a message type and/or a message transmission range; wherein, different message types and/or message transmission ranges correspond to different scrambling information. Therefore, internal members or peripheral devices of a group may selectively receive messages of different types or different target ranges. Hence, not only messages may be ensured to be accurately received by corresponding receivers, but also security of internal message may be improved.

Abstract: A resource determination method, a resource scheduling method and apparatuses thereof. The method includes: receiving, by a terminal equipment, indication information transmitted by a network device, and receiving resource scheduling information transmitted by the network device, the indication information being used to determine whether a spacing bandwidth resource belongs to a scheduling bandwidth resource; and determining a size of a transport block according to the indication information and the resource scheduling information.

Abstract: An SSB-based measurement method and apparatus, in which a first measurement result of a first cell is obtained according to at least one of QCL relationships between SSBs to which the first cell corresponds, an SSB transmission restriction to which the first cell corresponds and a detection result of SSBs of the first cell, and measurement information of the first cell is generated according to the first measurement result of the first cell and reported.

Abstract: An uplink transmission method, an uplink scheduling method, apparatuses thereof and a system. The uplink transmission method includes: a terminal equipment performs channel detection on two or more bandwidth units of a carrier; and transmits uplink transmission on at least one bandwidth unit according to a result of the channel detection by the terminal equipment, the at least one bandwidth unit being detected as being idle. The terminal equipment may perform channel detection on two or more bandwidth units of a carrier, and determine whether the bandwidth units are busy or idle.

Abstract: A random access method and apparatus. The method includes: transmitting a first random access request at least including a preamble, uplink data and a demodulation reference signal by a terminal equipment to a network device; and receiving a random access response transmitted by the network device; wherein mapping of the preamble to an uplink data channel resource and a demodulation reference signal port is determined according to configuration information or is configured by the network device.

Abstract: A data transmission method, apparatus and system including terminal equipment for channel detection and terminating the channel detection at a first time position, a result of the channel detection being that a channel is idle; and the terminal equipment transmits data starting from a second time position, the second time position being after the first time position, a first time length between the first time position and the second time position being less than or equal to a second time length. The terminal equipment terminates the channel detection after determining that the channel is idle, and transmits data after a time length (a first time length). As the first time length is less than or equal to a time length (the second time length) of an OFF-ON transient period to which the data correspond, a time length between terminating the channel detection and transmitting the data is reduced.

Abstract: A method and apparatus for transmitting and receiving uplink control information. The method includes: determining a channel access type of an uplink control channel used for transmitting uplink control information by a terminal equipment; and detecting a channel according to the channel access type and transmitting the uplink control information to a network device after the channel is detected as being idle, or not detecting a channel according to the channel access type and transmitting the uplink control information to the network device. Hence, in some scenarios, uplink control information may be transmitted without detecting a channel, which may lower latency and improve transmission efficiency; and in some other scenarios, uplink control information may be transmitted after the channel is detected as being idle, which may avoid or lower interference and improve reliability of transmission.

Abstract: A message transmitting/receiving apparatus and method and a communication system. The message transmitting method includes: determining a message type of a message to be transmitted to one or more user equipments; scrambling control information of the message by using an identity to which the message type corresponds; wherein, different identities correspond to different message types; and transmitting data information of the message and the scrambled control information to the one or more user equipment.

Abstract: A method and apparatus for configuring and determining paging opportunities and a system, in which by increasing transmission opportunities of paging, such as increasing total paging opportunities or increasing paging opportunities for paging a specific terminal, a network device may be ensured to find terminal equipment or punctually notify the terminal equipment of update of system information and transfer of public warning system (PWS) information.

Abstract: A data transmission method and apparatus, wherein a first SSB set corresponding to a transmission window and a second SSB set taken as a subset of the first SSB set are provided, and at least one SSB in the second SSB set is transmitted in the transmission window, which may be adapted to cell coverage of different situations, and improve flexibility of resource scheduling.

Abstract: An uplink transmission control method and apparatus and a communication system. The network device explicitly or implicitly indicates dynamic scheduling information of RACH resources via control signaling. After selecting RACH resources, the user equipment (UE) monitors control signaling corresponding to the RACH resources. According to situations of receiving the control signaling, when the selected RACH resources are available, the UE directly transmits a random access request matched with the RACH resources; and when the selected RACH resources are unavailable, the UE further selects RACH resources according to configuration or indication of a base station, and until an RACH resource is available, the UE transmits a random access request matched with the RACH resource. Hence, normal random access of the UE may be ensured, and interference to other UEs may be reduced.

Abstract: A communications apparatus, a base station, and a communications method. The communications apparatus includes processing circuitry configured to: group users in a 3D beam-forming space of a current cell into multiple space user groups; determine group configuration information of the users in the 3D beam-forming space of the current cell; notify a neighbor cell of the group configuration information of the users in the 3D beam-forming space of the current cell to assist inter-cell interference coordination, wherein the current cell is configured with an antenna array having multiple physical antennas to achieve 3D beam-forming.

Abstract: A terminal includes: a processor circuit configured to: configure at least two uplink bandwidth parts (UL BWPs) and at least two downlink bandwidth parts (DL BWPs); determine an active DL BWP of the at least two DL BWPs, the active DL BWP having a corresponding UL BWP of the at least two UL BWPs, wherein the corresponding UL BWP is configured with at least one time-frequency resource to transmit a preamble; select a time-frequency resource from at least one time-frequency resource allocated for preamble transmission in the corresponding UL BWP corresponding to the active DL BWP; and select a first preamble from at least one preamble allocated for preamble transmission corresponding to the active DL BWP; a transmitter configured to transmit the first preamble, on the selected time-frequency resource, to a network device; and a receiver configured to receive a random access response (RAR) on the active DL BWP.

Abstract: A signal transmission method and apparatus, a signal reception method and apparatus and a communication system. The signal transmission apparatus is provided in a network device and includes: a transmitting unit configured to transmit indication information indicating that one information block of at least one information block transmitted by the network device within a time interval is transmitted at one candidate resource in at least two candidate resources within the time interval. The transmission resources of the information blocks are indicated by the indication information, hence, even though the default correspondence between the information block indices and the transmission resources is to be changed, the transmission resources to which the information blocks correspond may be determined, and the terminal equipment is facilitated in downlink synchronization.