Abstract:
Wireless communication methods and devices are provided. The wireless communication method includes transmitting a reference signal and a data signal in a Physical Resource Block (PRB) with a coverage enhancement level, wherein the number of resource elements transmitting the reference signal in the PRB is determined by the coverage enhancement level, the channel type and/or the coding rate of the data signal.
Abstract:
The present disclosure provides a scheduling assignment indicating method and device-to-device (D2D)-enabled wireless device. The method is used by D2D-enabled wireless devices communicating with each other via multiple SA periods, each of which including a SA pool and a data pool, wherein the SA pool is used for transmitting SA for assigning data resource of the data pools, the method comprising: selecting SA resources in SA pools of more SA periods to transmit SA to assign the same data resource for the D2D-enabled wireless device. The SA indicating method and D2D-enabled wireless device according to the present disclosure can increase the capacity of the SA pools, avoid SA and/or data transmission collisions, and increase the robustness of the SA transmission.
Abstract:
To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/3
Abstract:
A base station is disclosed that enables an efficient use of resources even when a TTI length is shortened. In this base station, a PDCCH section (103) generates one piece of downlink control information (DCI) containing control information for a plurality of first transmission time intervals (TTIs) each having a TTI length shorter than a second TTI, and a transmission section (107) transmits the DCI. Control information on retransmission processing for a data signal is configured for each of the plurality of first TTIs while control information other than the control information on the retransmission processing is configured in common among the plurality of first TTIs in the DCI.
Abstract:
If repetition transmission is applied to a response signal for a downlink data signal and an uplink signal, the uplink signal is repeatedly transmitted using a certain number of consecutive subframes starting with a first subframe, at which the repetition transmission of the uplink signal starts, and the response signal is repeatedly transmitted using at least the certain number of consecutive subframes starting with a second subframe, at which the repetition transmission of the response signal starts. The first subframe is set to be the same as the second subframe.
Abstract:
Received Signal Strength Indicator (RSSI) is measured accurately even in a case where a discovery signal is transmitted. A receiver receives a plurality of subframes, at least one of which includes a discovery signal, and a measurer measures Reference Signal Reception Power (RSRP) using a first resource in which the discovery signal is mapped, measures RSSI using a second resource different from the first resource for which the discovery signal is mapped, and calculates Reference Signal Reception Quality (RSRQ) using RSRP and RSSI.
Abstract:
In a transmission apparatus, a mapper maps frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band, a time-division multiplexer time-division multiplexes the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band, and a transmitter transmits the transmission signal, wherein an autocorrelation value of the transmission signal being to be used for timing synchronization at a reception apparatus that receives the transmission signal.
Abstract:
A reception processor receives the cell detection reference signals, each of the cell detection reference signals being transmitted from corresponding one of a plurality of cells. An RRM report generator generates measurement information indicating a measurement result of reception quality measured using the cell detection reference signal. A transmission processor transmits the measurement information. The cell detection reference signals are mapped to any one of a plurality of candidate resources, which is a part of a plurality of resources set for other reference signals in a subframe to which the cell detection reference signals are mapped.
Abstract:
Provided are resource-utilization controlling methods for a device-to-device communication and wireless devices therefor. The method performed by a first wireless device comprises steps of: detecting current utilization state of the resource for the device-to-device communication as a resource utilization state; and explicitly or implicitly signaling the resource utilization state through broadcasting in the physical layer. The method performed by a second wireless device comprises steps of: receiving one or more resource utilization states explicitly or implicitly signaled from one or more other wireless devices; and determining whether and/or how to adjust the transmission behavior of the second wireless device based on the received one or more resource utilization states.
Abstract:
Provided is a terminal that can accurately measure channel information between the terminal and each TP subjected to CoMP control. In this terminal, a reception processing unit (203) receives a reference signal transmitted from a specific transmission point and control information, and receives a signal transmitted from a transmission point other than the specific transmission point, this signal being received in resources comprising, from among a reference-signal resource group, a resource of a first number specified from the control information, and a resource of a second number separated from the first number by a predetermined number. A CSI generation unit (206) uses the reference signal and a signal received by an interference measurement resource to generate channel information. A transmission signal-forming unit (208) transmits the generated channel information.