Abstract:
Provided are a machine type communication (MTC) device, an apparatus and method for allocating resources to the MTC device, and a data transmission/reception method of the MTC device. The method of allocating resources to at least one user equipment (UE) and the MTC device includes determining whether there are resources allocated for an MTC device in a resource section, and when there are resources allocated for an MTC device, determining the class of the MTC device, determining the bandwidth of a resource region for the MTC device, and configuring a downlink frame according to the bandwidth of the resource region for the MTC device.
Abstract:
In a communications system using a plurality of beams, a terminal determines a beam to be communicated with the terminal among the plurality of beams, determines one sequence among sequences allocated to the determined beam as a beam based random access preamble, and transmits the beam based random access preamble through the determined beam. In addition, if a random access response for the beam based random access preamble is not received from a base station for a set interval, the terminal determines one sequence among sequences in a cell based random access preamble collection as a cell based random access preamble and transmits the cell based random access preamble.
Abstract:
Provided is a method for feeding back a channel quality indicator (CQI) by a terminal. The terminal receives, from a base station, at least one reference signal through at least one of multiple beams of the base station. The terminal measures a signal-to-interference plus noise ratio (SINR) for the at least one reference signal. The terminal determines a first level corresponding to the measured SINR among levels of a first CQI. In addition, the terminal feeds back the first CQI having the first level to the base station.
Abstract:
A method and apparatus for simultaneously transmitting data to a plurality of terminals are provided. The method includes: selecting a plurality of simultaneous transmitting terminals based on a signal-to-noise ratio (SNR) of the plurality of terminals; allocating a power rate of the plurality of simultaneous transmitting terminals to each of the plurality of simultaneous transmitting terminals; modulating each of the data according to a modulation method that is determined based on the power rate; and transmitting the modulated data according to the power rate.
Abstract:
There are provided a communication device using a millimeter-wave frequency band and a communication method using the millimeter-wave frequency band. The communication device includes a beam scheduling unit configured to schedule uplink and downlink beams corresponding to movement of a terminal, a core network interface unit configured to transmit data provided from the beam scheduling unit to a core network, and to provide data received from the core network to the beam scheduling unit, a mobility management unit configured to configure an uplink and downlink beam set based on inter-beam interference information provided from the beam scheduling unit, and an inter-base station interface unit configured to exchange a control message with another base station under control of the mobility management unit. Therefore, it is possible to efficiently build a cellular network using the millimeter-wave frequency band.