Provided are a method for data transmission and apparatus. The method includes: receiving configuration information from a base station, the configuration information indicating whether a data packet deletion function is enabled at a PDCP entity corresponding to a preset data bearer. When the data packet deletion function is enabled, a duration for transmission of SDUs is recorded when the SDUs are transmitted from the PDCP entity corresponding to the preset data bearer to a RLC layer. A first SDU that has not yet been transmitted to the RLC layer is determined from the SDUs in a case that the duration for transmission of the SDUs is longer than a preset duration. The first SDU is deleted.

An embodiment of the present invention discloses a buffer status reporting method, where the method including: triggering, by a terminal, reporting of a padding buffer status report (padding BSR); and determining, by the terminal, a reported BSR format according to a size of padding bits, a size of a first type of BSR format plus its media access control (MAC) subheader, and a quantity of logical channel groups currently having to-be-transmitted data being buffered, where a quantity of logical channel groups corresponding to the BSR format is greater than or equal to 1, and less than or equal to a maximum quantity of logical channel groups currently having to-be-transmitted data being buffered.

An embodiment of the present invention discloses a buffer status reporting method, where the method including: triggering, by a terminal, reporting of a padding buffer status report (padding BSR); and determining, by the terminal, a reported BSR format according to a size of padding bits, a size of a first type of BSR format plus its media access control (MAC) subheader, and a quantity of logical channel groups currently having to-be-transmitted data being buffered, where a quantity of logical channel groups corresponding to the BSR format is greater than or equal to 1, and less than or equal to a maximum quantity of logical channel groups currently having to-be-transmitted data being buffered.

A method and a terminal device for resource configuration in D2D communications includes performing, by a terminal device, resource sensing on at least one carrier based on a first parameter set to obtain an available resource set on the at least one carrier. A resource in an available resource set on each carrier can be used to transmit a target service. The method also includes reporting, by the terminal device, information about the available resource set on the at least one carrier to a network device. The information about the available resource set is used for the network device to determine a target resource for transmitting the target service. Therefore, the terminal device performs resource sensing and reports the obtained available resource set, so that the network device can allocate an appropriate transmission resource to the terminal device based on the information about the available resource set, thereby reducing interference.

A method and a terminal device for resource configuration in D2D communications includes performing, by a terminal device, resource sensing on at least one carrier based on a first parameter set to obtain an available resource set on the at least one carrier. A resource in an available resource set on each carrier can be used to transmit a target service. The method also includes reporting, by the terminal device, information about the available resource set on the at least one carrier to a network device. The information about the available resource set is used for the network device to determine a target resource for transmitting the target service. Therefore, the terminal device performs resource sensing and reports the obtained available resource set, so that the network device can allocate an appropriate transmission resource to the terminal device based on the information about the available resource set, thereby reducing interference.

Methods, apparatuses, and computer readable media for high efficiency (HE) beacon and HE formats in a wireless network are disclosed. An apparatus of a high efficiency (HE) access point (AP), where the apparatus comprises processing circuitry configured select a <HE-MCS, NSS=1> tuple from the basic HE-MCS set of tuples, if a basic HE modulation and control scheme (MCS) (HE-MCS) and a number of spatial streams (NSS) set of tuples is not empty, and otherwise select the <HE-MCS, NSS=1> tuple from a mandatory HE-MCS and NSS set of tuples. The processing circuitry may be further configured to encode a beacon frame in a HE single user (SU) physical layer (PHY) protocol data unit (PPDU), in accordance with the selected <HE-MCS, NSS=1> tuple, and configure the HE AP to transmit the HE SU PPDU. Null data packets formats, methods, computer readable media, and apparatuses are disclosed for multiple 20 MHz operations.

Methods, apparatuses, and computer readable media for high efficiency (HE) beacon and HE formats in a wireless network are disclosed. An apparatus of a high efficiency (HE) access point (AP), where the apparatus comprises processing circuitry configured select a <HE-MCS, NSS=1> tuple from the basic HE-MCS set of tuples, if a basic HE modulation and control scheme (MCS) (HE-MCS) and a number of spatial streams (NSS) set of tuples is not empty, and otherwise select the <HE-MCS, NSS=1> tuple from a mandatory HE-MCS and NSS set of tuples. The processing circuitry may be further configured to encode a beacon frame in a HE single user (SU) physical layer (PHY) protocol data unit (PPDU), in accordance with the selected <HE-MCS, NSS=1> tuple, and configure the HE AP to transmit the HE SU PPDU. Null data packets formats, methods, computer readable media, and apparatuses are disclosed for multiple 20 MHz operations.

A data processing method, where a first device communicates with a second device using a relay node, where the relay node does not have a Packet Data Convergence Protocol (PDCP) entity, and the method includes transmitting, by the first device, a first data unit group, where the first data unit group is in a first sequence range, receiving, by the first device, first information using the relay node, where the first information indicates a data unit that the second device has received or has not received in the first data unit group, determining, by the first device, a second sequence range based on the first information.

A data processing method, where a first device communicates with a second device using a relay node, where the relay node does not have a Packet Data Convergence Protocol (PDCP) entity, and the method includes transmitting, by the first device, a first data unit group, where the first data unit group is in a first sequence range, receiving, by the first device, first information using the relay node, where the first information indicates a data unit that the second device has received or has not received in the first data unit group, determining, by the first device, a second sequence range based on the first information.

A method and a network entity are provided. A set of transmission configuration indicator state configurations are transmitted to a user equipment, via a protocol layer above the physical layer, wherein each transmission configuration indicator state includes an indication of an associated at least one downlink reference signal which is used as a quasi co-location source for a resource and a quasi co-location type associated with the at least one downlink reference signal. The at least one downlink reference signal associated with the set of transmission configuration indicator state configurations is transmitted. An indication of a first subset of transmission configuration indicator states is received from the user equipment, where the indication of the first subset includes identifying the particular transmission configuration indicator states that are part of the first subset, based on the at least one downlink reference signal associated with the set of transmission configuration indicator state configurations.