Abstract:
Various communication techniques and related systems for a fusion between a 5th generation (5G) communication system and Internet of Things (IoT) technology are provided. A user equipment (UE) is required to select a dedicated core network so as to receive a suitable service. In a method for transmitting and receiving a signal, an enhanced Node B (eNB) of a mobile communication system transmits a first request message to a first mobile management entity (MME), receives a reroute command message based on the first request message from the first MME, and transmits a second message to a second MME based on the reroute command message. Herein, the reroute command message contains the first request message, at least one MME identifier, and a UE identifier.
Abstract:
A method for canceling interference between multiple terminals scheduled on the same time/frequency resource for communication between a terminal and a base station using a plurality of antennas. The interference cancellation method includes receiving, at a terminal, control channel information from a base station, determining other base station information and other terminal information based on the received control channel information, receiving a data channel from the base station, and cancelling interference to the data channel based on the other base station information and other terminal information. The terminal is capable of mitigating interference caused by the signals transmitted to other terminals using the least information even with legacy terminal receivers having no interference cancellation capability.
Abstract:
A method and apparatus of exchanging information on the number of layers which is supported commonly between the base station and the terminals in Multi-User Multiple Input Multiple Output (MU-MIMO) environment is provided for performance enhancement. The communication method of a terminal in a wireless communication system according to the present disclosure includes receiving a reference signal and information on a number of layers supportable simultaneously from a base station, measuring a channel state value based on the reference signal and the number of layers, determining whether the measured channel state value fulfills a minimum required channel state value, and transmitting, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station.
Abstract:
A method for CSI report transmission includes detecting a collision in a subframe, between a first PUCCH CSI report of one serving cell with which a UE is configured in one of transmission modes 1 to 9, and a second PUCCH CSI report of another serving cell with which the UE is configured in transmission mode 10. Upon the reporting types of the collided PUCCH CSI reports having a same priority, the method transmits the first PUCCH CSI report if the CSI process index of the second PUCCH CSI report has a positive value other than 1. A method for CSI report transmission includes configuring, via a higher layer, a UE configured in transmission mode 10 whether to create a respective CSI report(s) for each aperiodic CSI process or not, using an information element including at least three one-bit variables.
Abstract:
A method and an apparatus for transmitting and receiving signals modulated with 256 Quadrature Amplitude Modulation (256QAM) for use in a mobile communication system are provided. The method includes receiving a first signal from a terminal, determining a modulation application criterion for data communication with the terminal based on the first signal, receiving a second signal including an index from the terminal, and determining a modulation scheme to be applied to at least one of the signals communicating with the terminal based on the modulation application criterion and the received index.
Abstract:
A method of transmitting a reference signal in a mobile communication system is provided. The method includes determining at least three scrambling variables comprising a first scrambling variable, a second scrambling variable, and a third scrambling variable, wherein the first scrambling variable, the second scrambling variable, and the third scrambling variable are different from each other, determining whether a demodulation reference signal is for more than or equal to 3-layer transmission, generating, if the demodulation reference signal is for more than or equal to 3-layer transmission, the demodulation reference signal sequence using the third scrambling variable and transmitting the demodulation reference signal sequence through a corresponding antenna port.
Abstract:
Methods and apparatus are provided for receiving a serving signal from a base station by a user equipment. A signal that includes the serving signal and an interference signal is received. A Log Likelihood Ratio (LLR) of the received signal is calculated according to each of a plurality of modulation orders applicable to the interference signal to obtain a plurality of LLR values. A modulation order of the interference signal is determined, based on the plurality of LLR values. The serving signal is reconstructed, based on the determined modulation order.
Abstract:
The present disclosure relates to a method and an apparatus for transmitting and receiving channel related information. A method of transmitting channel related information of a UE according to an embodiment of the present disclosure includes configuring a sub-channel corresponding to a part of a plurality of antennas of an eNB; acquiring a Channel Estimation Error (CEE) and a Precoding Matrix Indicator (PMI) corresponding to the sub-channel; and transmitting a Sub-channel Indicator (SI) indicating the sub-channel, according to the CEE and the PMI. In accordance with an embodiment of the present disclosure, the channel related information is efficiently transmitted and received in a system in which a plurality of antennas is used.
Abstract:
Disclosed are an apparatus for transmitting and receiving a downlink data in a wireless communications system supporting cooperation between transmission points and a method therefor. A method for transmitting a downlink data in a wireless communications system includes the steps of: transmitting the information on resources management collection including the CSI-RS information for measuring the terminal received bower to a terminal; receiving a report of the received power measurement of the CSI-RS corresponding to the resources management collection from the terminal; determining the measurement collection including the CSI-RS information for the terminal to infer a channel based on the received power measurement report; and transmitting the resources mapped with data to the terminal based on the measurement collection.
Abstract:
A channel estimation method and apparatus are provided for a terminal in a cellular mobile communication system including a plurality of base stations. The method includes maintaining a maximum number of CSI processes supported by the UE; receiving CSI process report information; determining a number of CSI to be updated based on the maximum number of CSI processes supported by the UE; generating at least one CSI report based on the determined number of CSI to be updated; and transmitting the at least one CIS report to an evolved Node B (eNB).