Ntt Docomo, Inc.

Wenjia Liu

Xiaolin Hou

Runxin Wang

Liu Liu

Qin Mu

Satoshi Nagata

Xin Wang

Juan Liu

Yuki Matsumura

Xiangming Li

Neng Ye

Hiroki Harada

Daiki Takeda

Dongbo Feng

Jing Wang

Yoshihisa Kishiyama

Kazuaki Takeda

Takahiro Asai

Lan Chen

Anxin Li

Lu Jiang

Naoya Shibaike

Nadisanka Rupasinghe

A terminal transmits and receives a slot configured with a plurality of symbols. The terminal sets a length of a cyclic prefix added to each symbol based on a degree of compression of each symbol in time domain.

Terminal

The present disclosure provides an electronic device, including: an input unit configured to obtain a sequence to be compressed, wherein the sequence to be compressed has Q time-domain symbol elements, and Q is an integer greater than zero; a processing unit configured to perform a zero-padding operation on the sequence to be compressed according to at least a part of a compression factor to determine a zero-embedded sequence, perform a discrete Fourier transform spreading operation according to the zero-embedded sequence to determine a spread sequence, and perform at least one of a data deletion operation and a data superimposition operation based on the spread sequence to determine a compressed sequence, wherein the compressed sequence has M frequency-domain symbols, M is an integer greater than zero, and M is less than or equal to Q.

Electronic device

The present disclosure provides a terminal and a base station in a communication system. The terminal includes: a receiving unit configured to receive, from a base station, first information indicating a first parameter, where the first parameter indicates a number of candidate transform domain vectors regarding a subcarrier-level precoding matrix, and a value of the first parameter is smaller than a number of subcarriers of the communication system; the receiving unit being further configured to receive, from the base station, second information indicating a second parameter, where the second parameter indicates a number of transform domain vectors used to determine the subcarrier-level precoding matrix; and a control unit configured to determine, from the number of candidate transform domain vectors indicated by the first information, the number of transform domain vectors indicated by the second information.

Terminal and base station in communication system

A terminal according to an aspect of the present disclosure includes a receiving section that receives demodulation reference signal (DMRS) information relating to at least one resource of a DMRS, to which at least one DMRS a first precoder for a beam is applied and a second precoder for superposing signals for a plurality of terminals in the beam is not applied, and a control section that demodulates a physical downlink shared channel (PDSCH) to which the first precoder and the second precoder are applied, based on the DMRS and information relating to the second precoder. According to an aspect of the present disclosure, downlink throughput using the MIMO can be improved.

Terminal and radio communication method for demodulating a PDSCH using a first and second precoder based on a DMRS

Embodiments of the present disclosure provide a user equipment and a base station that can be used in a wireless communication system, or a method executed by a user equipment and a base station. The user equipment in the embodiments of the present invention includes: a control unit, configured to acquire a multiple access signature, wherein the multiple access signature is determined, from a multiple access signature pool, according to activation information of the user equipment, and the activation information of the user equipment is related to the activation of the user equipment; and a sending unit, configured to use the multiple access signature to send data.

User equipment and base station, and method executed by user equipment and base station

A terminal according to the present disclosure includes: a receiving section that receives configuration information related to channel state information (CSI) reporting; and a control section that controls transmission of a plurality of pieces of wideband information each including at least one of information related to a plurality of delays and information related to a plurality of coefficients corresponding to the delays, based on the configuration information. Thereby, it is possible to prevent degradation of the reporting accuracy of CSI while suppressing the increment of the UL overhead.

Terminal and radio communication method

A terminal determines a target code rate by using a reference code rate, which is based on a modulation scheme and a modulation order, and an adjustment coefficient α that lowers the reference code rate. The terminal transmits/receives a signal encoded based on the target code rate.

A method and device for transmitting reference signals are provided in the present disclosure, where the method for transmitting reference signals is performed by a user terminal and time-frequency resources for the user terminal are divided into multiple groups of time-frequency resources. The method includes: selecting a reference signal port for each group of time-frequency resources from candidate reference signal ports; and transmitting reference signals by using the reference signal port corresponding to each group of time-frequency resources.

Method and device for transmitting reference signals

Provided by an embodiment of the present invention are a user equipment and base station that may be used in a wireless communication system, or a method performed by the user equipment and the base station. The user equipment according to the embodiment of the present invention includes: a receiving unit that is configured to receive multiple access signature information for the user equipment from a base station, wherein the multiple access signature information includes correction information indicating a reference signal sequence sent with respect to the user equipment; and a control unit that is configured to determine the reference signal sequence of the user equipment according to the received correction information.

User equipment, base station, and method for modifying demodulation reference signal (DMRS) sequences

Embodiments of the present invention provide information transmitting and receiving methods, a user equipment, and a base station. The information transmitting method performed by the user equipment includes: receiving indication information, the indication information indicating sub-block sizes of a plurality of sub-blocks obtained by splitting an information block to be transmitted; splitting the information block to be transmitted into the plurality of sub-blocks according to the indication information; processing respective sub-blocks to generate transmission data, and transmitting the transmission data.

Splitting an information block into sub-blocks

Disclosed are a resource allocation method for demodulation reference signals and a base station. The resource allocation method for demodulation reference signals executed by the base station includes: determining an allocation method for a resource required for transmitting a plurality of demodulation reference signals and a parameter for generating the plurality of demodulation reference signals, the plurality of demodulation reference signals respectively corresponding to a plurality of user equipments, the allocation method being capable of supporting transmission of the plurality of demodulation reference signals on the same time domain resource, and the parameter being capable of making the demodulation reference signals sent with the same time frequency resource distinguished from each other; and transmitting information indicating the allocation method and information indicating the parameter to the plurality of user equipments.

Resource allocating method for demodulation reference signal and base station

Provided are a method and device for uplink power control. A user terminal performing the method includes: a receiving unit configured to receive signature information for the user terminal from a base station; and a control unit configured to determine a transmission power of the user terminal according to the received signature information.

Method and device for uplink power control

Provided are a method for transmitting signals and corresponding terminals, and base stations, where the method for transmitting signals is performed by a terminal in a communication system. The method includes determining, whether to transmit an additional reference signal to a base station in the communication system according to information on channel conditions of the terminal; transmitting a main reference signal to the base station, where the main reference signal is used for channel estimation between the terminal and the base station; and when determining to transmit an additional reference signal to the base station, transmitting an additional reference signal to the base station according to configuration information of the additional reference signal.

Method for transmitting signals and corresponding terminals, and base stations

A method for determining an uplink scheduling manner, a user equipment and a base station are disclosed. A method for determining an uplink scheduling manner performed by a user equipment includes: determining a communication parameter regarding the user equipment; determining, based on the communication parameter and a threshold regarding the communication parameter, to perform uplink data transmission based on an uplink grant based scheduling manner, or to perform the uplink data transmission based on an uplink grant free scheduling manner.

Method for determining an uplink scheduling manner, user equipment and base station

The present disclosure provides a method and apparatus for generating spread symbols. The method includes: determining a spreading sequence according to a spreading sequence matrix, where the spreading sequence matrix is generated according to performance parameters of a plurality of user terminals; and spreading initial symbols by using the determined spreading sequence to generate spread symbols.

Growing community of inventors

Beijing, China

Wenjia Liu