Abstract:
Embodiments of the present disclosure relate to the communications field, and provide a reference signal transmitting/receiving method and system, and an apparatus. The method includes: determining, by a transmitting device, a first resource map of a reference signal supporting Z antenna ports, and transmitting the reference signal after the reference signal supporting Z antenna ports is mapped to a target time-frequency resource based on the first resource map, where the first resource map is repeated in time domain and/or frequency domain in a repetition unit of K resource units, each of the K resource units corresponds to a second resource map of a reference signal supporting P antenna ports, and the P antenna ports corresponding to the second resource map for every two adjacent resource units include G same antenna ports and H different antenna ports.
Abstract:
The present invention relates to the communications field, and provides a channel measurement method, a base station, and UE, to perform channel measurement without affecting downlink data transmission. The method includes: obtaining, by UE, a reference signal resource mapping diagram, and obtaining a reference signal according to the reference signal resource mapping diagram; performing, by the UE, channel measurement according to the reference signal to determine channel state information, and feeding back the channel state information to a base station, where the reference signal resource mapping diagram is a location to which a time-frequency resource of the reference signal is mapped, the reference signal resource mapping diagram is a first reference signal resource mapping diagram or a second reference signal resource mapping diagram.
Abstract:
Embodiments of the present disclosure provide an uplink power control method, a user equipment and a base station. The method comprises: receiving configuration information of a channel state information reference signal CSI-RS from the base station, wherein the configuration information of the CSI-RS comprises reference signal port information and reference signal power information; and measuring a path loss for uplink power control based on the configuration information of the CSI-RS. The embodiments of the present disclosure use the CSI-RS to measure the path loss, which differs from a common CRS in that the CSI-RS may aim at a specific base station. Therefore, path loss measurement may be performed in respect of a target base station of uplink transmission, enabling the path loss compensation to match the actual path loss, thus improving the performance of uplink power control.
Abstract:
A method, an eNodeB and a User Equipment for transmitting Random Access Response messages are provided. The method includes: receiving a random access preamble, wherein the random access preamble is transmitted by a user equipment on a random access channel; determining whether the user equipment belongs to a random access area central group or a random access area edge group according to the random access preamble; if the user equipment belongs to the random access area edge group, transmitting a first random access response (RAR) message to the user equipment, based on the random access preamble and a channel resource information.
Abstract:
Embodiments of the present invention disclose methods and apparatuses for receiving and sending a control channel, and are applicable to the field of communications technologies. In the embodiments of the present invention, a base station carries scheduling information of a user equipment of an R11 system in both the PDCCH region and the E-PDCCH region of a downlink subframe. In this way, the user equipment needs to detect the control channel within the PDCCH region and the E-PDCCH region, so that resources of the two regions are available to the user equipment of the R11 system. Moreover, the user equipment detects only the control channel of the first type in the PDCCH region, and detects control channels of the other type in the E-PDCCH region. The method in the embodiments of the present invention does not increase the number of control channel detections.
Abstract:
Disclosed a method and an apparatus for configuring and transmitting a pilot, the method includes: a UE determines, according to a partitioned resource set, a parameter for generating an initial value of a demodulation pilot sequence; generates an initial value of the demodulation pilot sequence on the first resource set according to the first parameter, and generates an initial value on the second resource set according to the second parameter; and obtains the demodulation pilot sequence according to the initial value. In embodiments of the present invention, since parameters for calculating the initial value of the demodulation pilot sequence are respectively configured according to a pre-partitioned resource set, the initial value can be calculated according to the resource set to which the E-PDCCH belongs and the set parameter, thus obtaining the demodulation pilot sequence for demodulating the E-PDCCH, so as to improve demodulation performance of the E-PDCCH.
Abstract:
Embodiments of the present invention provide a data transmission method, a base station and a user equipment. One transmission method includes: sending, by a base station, first data and random access information to a user equipment UE simultaneously; and acquiring, by the base station, receiving state information of the first data fed back by the UE through the random access information. Another transmission method includes: receiving, by a user equipment, UE, first data and random access information sent by a base station simultaneously; and feeding back, by the UE, receiving state information of the first data to the base station through the random access information. In the technical solutions of the present invention, a base station transmits data to a UE during a random access process, thereby reducing signaling interaction and time delay and improving the data transmission efficiency.
Abstract:
A communication method includes sending configuration information of a reference signal. The communication method also includes receiving the reference signal via M antenna ports based on the configuration information, wherein M is an integer greater than 0, the M antenna ports includes at least one first antenna port, a comb occupied by the first antenna port is based on a first offset, and the first offset is based on one or more of a time domain resource occupied by the first antenna port or a frequency domain resource occupied by the first antenna port.
Abstract:
A communication method and apparatus are provided, to improve communication reliability. The method includes: When a first index of a first signal is the same as a first index corresponding to first indication information, a terminal device may communicate the first signal based on a first spatial parameter indicated by the first indication information. The first spatial parameter may be for communicating at least two types of signals/channels. For example, the first indication information may be a unified TCI. Therefore, according to the method, in a scenario in which a spatial parameter for a signal/channel is indicated by the unified TCI, a spatial parameter used for a to-be-sent signal/channel can be accurately determined, and the communication reliability can be improved.
Abstract:
A communication method and apparatus are provided. The method includes: A terminal device receives a first downlink reference signal from a first network device, and the terminal device receives a second downlink reference signal from a second network device. The terminal device determines channel state information. The channel state information is determined based on a ratio of a first channel estimation value to a second channel estimation value. The first channel estimation value is determined based on the first downlink reference signal, and the second channel estimation value is determined based on the second downlink reference signal. The terminal device sends the channel state information.