Abstract: This application discloses an uplink control information sending method and receiving method, and a communication apparatus. The method includes: a terminal receives first indication information from a network device; and sends at least one type of uplink control information to the network device on an allocated resource, where the first indication information is used to indicate the resource allocated by the network device to the terminal, the allocated resource belongs to at least two basic frequency domain units and is used by the terminal to perform uplink transmission, and the at least one type of uplink control information is mapped to the allocated resource based on the basic frequency domain unit. In this way, even if the terminal can send the uplink control information on only a part of the allocated resource, it can be ensured that the uplink control information is not damaged.

Abstract: A method includes generating a preamble for a protocol version of a wireless local area network, where the preamble includes a legacy signal (L-SIG) field and a high efficiency signal (HE-SIG) field that are arranged in order, the HE-SIG field includes a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol that are arranged in order, and an input information bit of the first OFDM symbol is the same as that of the second OFDM symbol, and sending the preamble to a receive end device, so that the receive end device restores the preamble, and when determining that input information bits obtained after restoring the first OFDM symbol and the second OFDM symbol are the same, determines that the preamble is the preamble of the protocol version.

Abstract: This disclosure discloses a resource scheduling indication method and an apparatus. The method includes: A network device determines control information including resource scheduling indication information of data on different carriers, the resource scheduling indication information is used for resource scheduling of the data on the different carriers. The network device sends the control information to a terminal device. According to the method in this disclosure, the data cross different carriers may be scheduled by the control information, thereby reducing signaling overheads and improving communication efficiency.

Abstract: A communications method and apparatus. The method includes: determining configuration information of a bandwidth part (BWP), and sending the configuration information of the BWP. The BWP includes at least one resource block, the at least one resource block is located on at least one carrier, location information of different carriers in a system is determined based on a reference frequency domain location, and the configuration information of the BWP indicates a location of the at least one resource block based on the reference frequency domain location.

Abstract: A method includes receiving a first assignment for a first transmission with a first hybrid automatic repeat request (HARQ) process identifier (process ID) in a first network resource, receiving a second assignment for a second transmission with a second HARQ process ID in a second network resource, wherein the first network resource and the second network resource differ in a domain other than a time domain, detecting an indication indicating that the first HARQ process ID and the second HARQ process ID map to a same transmission block (TB), and communicating with an access node, a transmission associated with at least one of the first HARQ process ID or the second HARQ process ID.

Abstract: Methods and devices for grant-free uplink transmission in unlicensed spectrum are provided. A base station (BS) transmits grant-free resource configuration information to one or more electronic devices (EDs). The grant-free resource configuration information is used to configure the ED for GF uplink transmission in unlicensed spectrum. The GF resource configuration information includes GF ED group-specific resource configuration information indicating GF ED group-specific time-frequency (T/F) resources of the unlicensed spectrum for GF uplink transmission. The ED(s) transmit grant-free uplink transmissions over the unlicensed spectrum in accordance with the GF resource configuration information.

Abstract: A channel access method is provided. Under the method, a network element performs random backoff listen before talk (LBT) for channel preemption, and after the preemption succeeds, performs signal transmission in the first transmission time interval TTI within a maximum channel occupancy time MCOT. The network element also performs nonrandom backoff LBT for channel preemption before another at least one TTI within the maximum channel occupancy time MCOT.

Abstract: Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.

Abstract: The technology of this application relates to a method for transmitting uplink control information. The method includes a network device sending first signaling in a first cell to a terminal device. The terminal device may send uplink control information in a second cell based on the first signaling. The uplink control information may be uplink control information corresponding to the first cell and/or uplink control information corresponding to a third cell. The third cell is a cell other than the first cell and the second cell. According to the method provided in this application, a cell for sending the uplink control information may be dynamically configured for the terminal device, and can improve communication efficiency.

Abstract: Systems and methods are provided for transmitting and receiving pre-emption indications. The pre-emption indication is transmitted every K symbols or slots, on a group-common physical downlink control channel. The pre-emption indication is in respect of a group of K symbols or slots preceding a symbol or slot containing the group-common pre-emption indication. The group-common pre-emption indication indicates, for the group of K symbols or slots, which resources are pre-empted. The base station schedules resources for first downlink traffic, and transmits the scheduled first downlink traffic subject to pre-emption, and transmits second downlink traffic by pre-empting resources for the first downlink traffic. On the UE side, the UE receives the pre-emption indication. The UE receives its scheduled traffic taking into account the pre-emption indication.

Abstract: A master information block MIB determining method and apparatus are provided. The method is: A network device sends a synchronization information block to a terminal device. At least one field in an MIB included in the synchronization information block is used to indicate whether an MIB is an MIB applied to an unlicensed frequency band. After receiving the synchronization information block from the network device, the terminal device determines, based on the field in the MIB included in the synchronization information block, that the MIB is an MIB applied to the unlicensed frequency band. In this way, the terminal device can determine, based on the at least one field in the MIB in the synchronization information block, whether the received MIB is an MIB applied to the unlicensed frequency band, to accurately access a corresponding cell subsequently.

Abstract: A method includes generating, by an apparatus, a physical protocol data unit (PPDU) for a downlink multiple-user transmission, wherein the PPDU includes: a legacy preamble, a high efficiency Wi-Fi Signaling Field 1 (HEW-SIG1), a high efficiency Wi-Fi Signaling Field 2 (HEW-SIG2), adjacent to the HEW-SIG1, and a data portion, and wherein the HEW-SIG1 comprises a HEW-SIG2 modulation and coding scheme (HEW-SIG2 MCS) field, the HEW-SIG2 MCS field indicates a transmission modulation and coding scheme (MCS) used to transmit the HEW-SIG2, the HEW-SIG1 further comprises a frame structure indication field, and the frame structure indication field indicates whether a frame structure of a scheduling transmission is an uplink structure or a downlink structure, and the HEW-SIG2 comprises resource indication information; and sending, by the apparatus, the PPDU.

Abstract: The present invention discloses a method and an apparatus for indicating a channel in a wireless local area network WLAN. A sending station generates and sends a physical protocol data unit PPDU, the PPDU includes a preamble field and a data field, a high efficiency signal field HE-SIG-A of the preamble field includes a bandwidth identifier and a channel bonding identifier, and the channel bonding identifier is used to indicate whether a data transmission channel is continuous in a frequency domain. In the foregoing manner, a discontinuous channel in a frequency domain in a wireless local area network is indicated, an available channel for data transmission is improved, and a system throughput is increased.

Abstract: Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.

Abstract: Methods and devices for grant-free uplink transmission in unlicensed spectrum are provided. A base station (BS) transmits grant-free resource configuration information to one or more electronic devices (EDs). The grant-free resource configuration information is used to configure the ED for GF uplink transmission in unlicensed spectrum. The GF resource configuration information includes GF ED group-specific resource configuration information indicating GF ED group-specific time-frequency (T/F) resources of the unlicensed spectrum for GF uplink transmission. The ED(s) transmit grant-free uplink transmissions over the unlicensed spectrum in accordance with the GF resource configuration information.

Abstract: Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.

Abstract: The method includes generating, by an access point (AP), signaling that includes an AP identifier (ID) field, a bandwidth (BW) field, a guard interval (GI) field, a cyclic redundancy check (CRC) field, and a tail field, the AP ID field is used to indicate an ID of the AP, the BW field is used to indicate bandwidth required for data transmission subsequent to the signaling, the GI is used to indicate a length of a cyclic prefix (CP) required for data transmission subsequent to the signaling, the CRC field is used to guard a field before the CRC field in the signaling, and the Tail field is used to empty an encoder and a decoder, where the CRC field and the Tail field are the last two fields of the signaling. The method also includes sending, by the AP, the signaling.

Abstract: The present disclosure relates to transmission methods and apparatuses in Wireless Local Area Networks (WLANs). One example method for indicating transmission opportunity (TXOP) duration in a wireless communication system, comprising generating, by a TXOP holder, a physical layer protocol data unit (PPDU), where the High Efficiency Signal field A (HE-SIGA) in the PPDU carries a TXOP duration field, the TXOP duration field is used to indicate the remaining time for using the channel by the station to other stations, the TXOP duration field includes a first part which is used to indicate the granularity used, and a second part which is used to indicate the TXOP duration using the granularity indicated by the first part, and sending the generated PPDU.

Abstract: This application provides a method for transmitting an SS/PBCH block and an apparatus. The method includes: A terminal device receives one SS/PBCH block in an SS/PBCH block burst set, and then obtains indication information based on the one SS/PBCH block. The indication information may be used to indicate candidate indexes of at least one SS/PBCH block in the SS/PBCH block burst set, and a quantity of the candidate indexes is greater than 64. For example, the quantity of candidate indexes may be 128, 160, 180, 196, 240, or the like. A network device may not be limited to 64 candidate indexes. In other words, a quantity of candidate positions used to send the SS/PBCH block is not limited to 64. Therefore, the network device may send a larger quantity of SS/PBCH blocks to the terminal device.

Abstract: Methods and devices are provided that enable configuration of a selected set of electronic devices (EDs) that are allocated the same time-domain resources and either orthogonal or the same frequency interlaces on a same unlicensed channel. Configuring the selected set of EDs in order to align transmission starting points in the unlicensed channel and utilizing blocking symbols for at least some of the transmission starting points, may mitigate mutual blocking during LBT procedures.