Embodiments of the present disclosure provide an information detection method, an information sending method, a terminal, and a network device. The information detection method includes: performing blind detection of information in a candidate Physical Downlink Control Channel (PDCCH) group set. The candidate PDCCH group set is determined according to a candidate PDCCH set of each of multiple pieces of sub-search-space.

Methods and systems for detecting an enhanced massive mobile broadband (eMBB) physical downlink control channel (PDCCH) in the presence of for ultra-reliable low latency communication (URLLC) users are disclosed. A eMBB wireless transmit/receive unit (WTRU) may receive a eMBB control resource set (CORESET) configuration for a CORESET including a PDCCH preemption indicator. If PDCCH preemption is enabled based on the PDCCH preemption indicator, the eMBB WTRU may identify and remove preempted resource element groups (REGs) in the eMBB CORESET by comparing channel estimates for each REG bundle in the eMBB CORESET. The WTRU may perform channel estimation based on remaining REGs in the eMBB CORESET and detect the PDCCH by performing blind decoding, based on a received signal, on the remaining REGs in the eMBB CORESET.

Methods, systems, and devices for wireless communication utilizing a data channel search space for initial data transmissions and retransmissions are described. In one aspect, a base station may configure a data channel search space and a plurality of monitoring occasions for a wireless device. The data channel search space may include a plurality of sets of decoding candidates on which the wireless device may receive data transmissions from the base station. At least one of a frequency location, a resource size, or a modulation and coding scheme can vary between different sets of decoding candidates. The wireless device performs blind decoding in its data channel search space to communicate with the base station.

An SS monitoring method and a device. The method includes: obtaining target information, where the target information includes at least one of the following: configuration information of a first target SS and blind detection resource allocation information of the first target SS, the configuration information is used to indicate the number of blind detections in the first target SS, the blind detection resource allocation information is used to allocate the number of blind detections to an SS in the first target SS, and the number of blind detections includes at least one of the following: the number of downlink control channel candidates and the number of channel estimations; and monitoring a second target SS in the first target SS based on the target information.

The present invention provides a method of determining a transmission power for device to device, D2D, transmissions between a first user equipment device and a second user equipment device using transmission resources being used for transmissions to a cellular network entity by a third user equipment device, the method comprising determining a measure of a path loss between the cellular network entity and the first user equipment device, and using the measure of the path loss to determine a maximum transmission power such that the D2D transmissions are received at the cellular network entity with a signal level around or below a noise level.

This application provides a parameter determining method, a monitoring method, and a communications apparatus. The method includes: configuring, by a network device, a plurality of serving cells for a terminal, where at least two of the plurality of serving cells have different subcarrier spacings; and determining, by the network device based on at least one of subcarrier spacings of the plurality of serving cells, a maximum number of physical downlink control channel PDCCH candidates monitored by the terminal in a unit time. According to this application, a maximum number of PDCCH candidates monitored by a terminal in one time unit can be determined when carriers for carrier aggregation correspond to different subcarrier spacings.

Various solutions for PDCCH monitoring capability determination in CA scenario with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configuration configuring a first set of cells using a first PDCCH monitoring capability and a second set of cells using a second PDCCH monitoring capability. The apparatus may determine a first monitoring budget corresponding to the first set of cells based on the first PDCCH monitoring capability and a second monitoring budget corresponding to the second set of cells based on the second PDCCH monitoring capability. The apparatus may perform a PDCCH monitoring according to the first monitoring budget and the second monitoring budget.

Embodiments of this disclosure improve the reliability of blind decoding when beamforming is used by having a user equipment (UE) receive a single downlink control information (DCI) message with different transmission and/or reception parameters. In some embodiments, a UE receives more than one set of configuration parameters, where any two sets of configuration parameters out of the more than one set of configuration parameters have at least one different parameter. The UE may receive two sets of configuration parameters each having a different transmission modes, but the same search space type. Additional examples are also provided.

Methods and apparatuses are provided in a wireless communication system. Mini slot length information indicating mini slot length in a number of symbols is received from a base station via higher layer signaling. Downlink control information (DCI) including a number of mini slots for a hybrid automatic repeat and request (HARQ) feedback transmission is received from the base station. A mini slot for the HARQ feedback transmission is identified based on the mini slot length information and the number of mini slots for the HARQ feedback transmission. The HARQ feedback information is transmitted to the base station on a physical uplink control channel (PUCCH) based on the identified mini slot.

A method and a device for configuring a control channel, a method and a device for detecting a control channel, a program and a medium are provided. The method for configuring a control channel includes: transmitting, by a network-side device, downlink control information (DCI) to a terminal in a physical downlink control channel (PDCCH), where the DCI includes indication information for indicating not to monitor PDCCH; and transmitting the PDCCH to the terminal in a slot or a time-frequency resource where a fallback PDCCH subsequent to the PDCCH is located, when determining that the terminal does not successfully receive the DCI in the PDCCH.