Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Jung Pil Choi

Youn Ok Park

Hoon Ki Lee

Hee Sang Chung

Sung Woo Choi

Young Jo Bang

Go San Noh

Jun Hyeong Kim

Seung Nam Choi

Dae Soon Cho

Il Gyu Kim

Youn-Ok Park

Jun-Woo Kim

Seung Jae Bahng

Seungjae Bahng

Young Ha Lee

Seon Ae Kim

Jae Kwon Kim

Byung-Han Ryu

Hoon Do Heo

Chang Wahn Yu

Hyeong Sook Park

Jun Woo Kim

Eon Young Hong

Chong Hyun Lee

Il Min Kim

Hyun Myung Wu

Seungjae Bang

Nulibyul Kim

Gyu Il Kim

A method for sidelink DRX communication may configure a first resource sensing window for identifying whether resources of a candidate resource set to be used for sidelink DRX communication are reserved or used, identify whether the resources of the candidate resource set are reserved or used based on the first resource sensing window, determine a selected resource set based on a result of the identification, configure a second resource sensing window based on information on a DRX active time of a receiving terminal, which is received from the receiving terminal, identify whether the resources of the candidate resource set are reserved or used by another terminal based on the second resource sensing window, update the selected resource set based on a result of the identification on the second resource sensing window, and transmit data to the receiving terminal by using a resource of the updated selected resource set.

Method and apparatus for sidelink discontinuous reception (DRX) communication in wireless systems

An operation method of an IAB node in a communication system may comprise: measuring a power difference between a first signal received from a first node and a second signal received from a second node; controlling a transmit power of each of the first node and the second node based on the power difference; generating scheduling information for allowing the first node and the second node to simultaneously transmit signals; transmitting the scheduling information to the first node and the second node; and receiving signals that the first node and the second node simultaneously transmit according to the scheduling information by using the transmit power.

Method and apparatus for simultaneous transmission and reception operation in communication system

An operation method of a relay node may include: receiving, from a first communication node, first data composed of n bits; receiving, from a second communication node, second data composed of m bits; in response to determining that n is greater than m, generating first T-data of m bits excluding (n-m) bits from the n-bits of the first data and first R-data of (n-m) bits; generating third data by performing a network coding operation on the first T-data and the second data; transmitting the third data to the first communication node; and transmitting the third data and the first R-data to the second communication node.

Method and apparatus for relaying data in communication system

An operation method of a first terminal, performed in a communication system, may comprise receiving sidelink resource allocation information from a base station; receiving a first sidelink signal from a second terminal based on the sidelink resource allocation information; calculating a path loss experienced by the first sidelink signal based on the first sidelink signal; transmitting a second sidelink signal including information on the path loss experienced by the first sidelink signal to the second terminal; and receiving, from the second terminal, a third sidelink signal to which a sidelink transmit power determined based on the path loss is allocated.

Method and apparatus for controlling transmit power in sidelink communication system

An apparatus and method for detecting synchronization and signals using block data processing in a receiving system are provided. To process an input signal, a cumulative matrix is obtained from an input vector signal for each frame generated from the signal. A primary eigenvector is extracted from the cumulative matrix, and the maximum value of a correlation vector is calculated from the extracted primary eigenvector. A time delay is detected by comparing the calculated maximum value of the correlation vector with a first threshold value, and a delay correlation vector is calculated from the detected time delay. Finally, synchronization and signals are detected by comparing the calculated delay correlation vector with a second threshold value.

Apparatus and method for detecting synchronization and signals using block data processing

The present invention relates to a base station device and a signal transmitting method thereof. The base station device according to the present invention includes a digital signal processing device configured to separate transmission data into a first data area and a second data area, to verify whether first data detected from the first data area is pre-transmitted data, to compress any one of the first data and second data detected from the second data area based on a result of the verifying, and to transmit the compressed data via an interface, and a radio signal processing device configured to combine the first data and the second data and wirelessly transmit the transmission data when the second data is received from the digital signal processing device in a state in which the first data is received via the interface connected to the digital signal processing device and stored.

Base station device and signal transmitting method thereof

Provided are a method and an apparatus for transmitting resource allocation information. In the case when a wireless resource for a new terminal is fixedly allocated to a fixed allocation zone, the apparatus for transmitting resource allocation information determines a resource allocation method of allocating the wireless resource and determines an allocation form of a resource that is allocated by a resource allocation method to select any one information displaying method of a plurality of information displaying methods of displaying allocation information on the allocated resource on the basis of the determined resource allocation method and resource allocation form. Next, the resource allocation information is generated and transmitted on the basis of the selected displaying method.

Method and apparatus for transmitting resource allocation information

A receiver in a multiple-input multiple-output (MIMO) system is provided. The receiver includes a channel estimator estimating a channel based on a receiving signal, a minimum mean square error (MMSE) based reciprocal log likelihood ratio (R-LLR) calculator connected with the channel estimator and calculating an R-LLR based on the receiving signal and the estimated channel, and a channel decoder connected with the MMSE based R-LLR calculator and decoding the channel and the receiving signal based on the calculated R-LLR, wherein the R-LLR is calculated based on the reciprocity.

Method and apparatus of detecting signal based on minimum mean square error in multiple input multiple output system

In a multi-input multi-output communication system receiving signals transmitted through a plurality of transmission antennas by using a plurality of reception antennas, a matrix determining a position of a symbol to be detected from a received signal is calculated at a first symbol detection step, and from the subsequent step, a matrix at the current step is acquired through a simple relationship from the matrix calculated at the previous step to determine a position of a symbol to be detected.

Method and apparatus for signal detection based on MMSE in MIMO communication system

The present invention relates to a method of calculating a soft value and a method of detecting a transmission signal. The present invention estimates a channel on the basis of a received signal and rearranges a plurality of data streams. Further, a plurality of substitute vectors are selected from the rearranged data streams and a metric corresponding to each of the substitute vector is calculated. Further, a threshold value is calculated from a metric calculated for each of the substitute vectors and a soft value of each bit of a transmission signal is calculated from the metric and threshold value corresponding to each of the substitute vectors.

Method of calculating soft value and method of detecting transmission signal

The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.

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Daejeon, South Korea

Jung Pil Choi