First aperiodic zero power channel state information reference signal configuration information of a serving cell can be transmitted. Second aperiodic zero power channel state information reference signal configuration information of the serving cell can be transmitted. Downlink control information can be transmitted in a subframe of the serving cell. The downlink control information can include an aperiodic zero power channel state information reference signal indicator bit field that indicates a selection of one of at least the first aperiodic zero power channel state information reference signal configuration, the second aperiodic zero power channel state information reference signal configuration, and no aperiodic zero power channel state information reference signal in the subframe.

The present disclosure provides a channel blind detection method, a signal transmission method and related devices. The channel blind detection method includes, when the quantity of times of blind detection to be performed by a terminal side device within a specific time-domain range exceeds a maximum blind detection capability, skipping, by the terminal side device, a part of blind detection occasions within the specific time-domain range, and performing channel blind detection in the remaining blind detection occasions. The maximum blind detection capability is the maximum quantity of times of blind detection performed by the terminal side device within the specific time-domain range, and the remaining quantity of times of blind detection to be performed by the terminal side device within the specific time-domain range does not exceed the maximum blind detection capability. According to the present disclosure, it is able to improve performance of the terminal side device.

Provided in embodiments of the present application are a data transmission method, a terminal device and a network device, through which uplink data transmission can be performed when the channel detection bandwidth is inconsistent with the carrier bandwidth or the data transmission bandwidth of the system, thereby improving utilization efficiency for frequency spectrum resources of an unlicensed frequency spectrum. The method includes: receiving, by a terminal device, scheduling information transmitted by a network device; performing, by the terminal device, rate matching on the first transport block to obtain first data; determining, by the terminal device, an uplink transmission mode; and performing, by the terminal device, channel detection on the first carrier, and transmitting, according to a detection result and the uplink transmission mode, the first data to the network device through the first time-frequency resources.

A wireless communication system includes: a transmitting apparatus to transmit using one or more of radio resources; and a receiving apparatus to store correspondence information indicating a correspondence between a resource amount and a data size, the transmitting apparatus transmits to the receiving apparatus, data mapped to the radio resources, where the transmitting apparatus transmits a single control signal associated with the data to be transmitted across a plurality of time resource, the transmitting apparatus transmits a single control signal associated with the data transmitted across a plurality of frequency resources, the single control signal includes information indicating a value based on a number of the plurality of time resources, a number of the plurality of frequency resources, or information indicating a first resource amount wherein the receiving apparatus acquires a first data size being dependent on the value, the first resource amount, and correspondence information, and decode the data.

Methods, systems, and devices for wireless communications are described that support noise tracking within transmission time intervals (TTIs) in wireless communications. A transmitting user equipment (UE) in direct communications with a receiving UE may transmit one or more reference signals that allow the receiving UE to estimate noise during different portions of a TTI and compensate for varying noise levels within the TTI. The transmitting UE may identify different sets of symbols within the TTI that are expected to have different noise levels, and may transmit one or more reference signals that allow for noise estimation at the receiving UE for each of the different sets of symbols.

First aperiodic zero power channel state information reference signal configuration information of a serving cell can be transmitted. Second aperiodic zero power channel state information reference signal configuration information of the serving cell can be transmitted. Downlink control information can be transmitted on a physical control channel in a subframe of the serving cell. The downlink control information can include an aperiodic zero power channel state information reference signal indicator bit field that indicates a selection of one of at least the first aperiodic zero power channel state information reference signal configuration, the second aperiodic zero power channel state information reference signal configuration, and no aperiodic zero power channel state information reference signal in the subframe.

A communication method and device are described. In the communication method, a quality indicator value associated with the first communication protocol is calculated based on a signal characteristic of first communication protocol. A quality indicator value associated with the first communication protocol is determined based on a signal characteristic of the first communication protocol. Further, a gap time is calculated which represents the time until a next communication gap resulting from a first communication via the first communication protocol and second communication via a second communication protocol. A quality report value can be calculated based on the quality indicator value and a comparison of the gap time and a reporting time threshold value. Further, a quality report can be generated based on the quality report value.

A wireless receiver has a preamble detection apparatus and method which waits until the expected arrival of a beacon frame, after which power is cyclically applied during a preamble detection interval and a sleep interval until a preamble is detected. The preamble detector has a first mode with a longer preamble detection interval and a second mode with a shorter preamble detection interval. During the preamble detection interval, power is applied to receiver components, and during the sleep interval, power is not applied. The duration of the preamble detection interval is equal to a preamble sensing interval, and if a preamble is detected, power remains applied to a preamble processor for a preamble processing interval. The duration of the sleep interval is the duration of a long preamble less the sum of two times the preamble detection interval plus the preamble processing interval. Phase lock loop (PLL) power is applied a PLL settling time prior to and during the preamble detection interval.

First aperiodic zero power channel state information reference signal configuration information of a serving cell can be received. Second aperiodic zero power channel state information reference signal configuration information of the serving cell can be received. Downlink control information can be received on a physical control channel in a subframe of the serving cell. The downlink control information can include an aperiodic zero power channel state information reference signal indicator bit field that indicates a selection of one of at least the first aperiodic zero power channel state information reference signal configuration, the second aperiodic zero power channel state information reference signal configuration, and no aperiodic zero power channel state information reference signal in the subframe.

Provided are base stations, user equipments and wireless communication methods related to DCI design for latency reduction. A base station comprises: circuitry operative to form either a first type of DCI or a second type of DCI depending on whether to schedule a normal TTI or a shortened TTI in a subframe; and a transmitter operative to transmit the first type of DCI or the second type of DCI in the subframe, wherein the first type of DCI and the second type of DCI are differentiable; and if the second type of DCI is transmitted and another shortened TTI is to be scheduled, the circuitry is further operative to form a third type of DCI and the transmitter is further operative to transmit the third type of DCI in a shortened TTI after said shortened TTI that is scheduled by the second type of DCI in the subframe.