Electronics And Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Yong Seouk Choi

Sook Jin Lee

Namsuk Lee

Jun Sik Kim

Soon Gi Park

Il Gyu Kim

Sung Cheol Chang

Hyun Seo Park

Jisoo Park

Nak Woon Sung

Sun Mi Jun

Young-Jo Ko

Hee Sang Chung

DongSeung Kwon

Sang Chul Oh

Pyeong Jung Song

Kyung Sook Kim

Go San Noh

Jun Hyeong Kim

Ji Soo Park

Nam Suk Lee

SoonGi Park

Wanhee Kim

Min Woo Jeong

Duk Kyung Kim

Gwang Hae Kim

An operation method of a first cell in a communication system may include: receiving, from a first communication node that is an upper node of the first cell, a first signal including second cell configuration information of a second cell connected with the first communication node and a second communication node that is a lower node of the first cell; identifying, based on the first signal, that the first cell and the second cell are jointly operated by the first communication node as coordinative PCells; transmitting, to the second communication node, a second signal including information on joint operations of the coordinative PCells by the first communication node; and performing communication with the first communication node and the second communication node based on the joint operations of the coordinative PCells.

Method and apparatus for cell operation in communication system

An operation method of a terminal in a communication system may comprise: obtaining a plurality of serving beam measurement values by performing measurement on a plurality of serving beams; identifying a minimum measurement value among the plurality of serving beam measurement values; obtaining a plurality of beam measurement values by performing measurement on a plurality of beams received from a plurality of base stations included in the communication system; determining whether a first condition is satisfied, the first condition being defined based on a result of comparison between the plurality of beam measurement values and a sum of the minimum measurement value and a first offset; and in response to determining that the first condition satisfied, performing communication with at least part of the plurality of serving base stations and a first base station forming a first beam satisfying the first condition.

Method and apparatus for beam-based communication in communication system

An operation method of a terminal in a communication system may include: receiving, from a base station, primary RA configuration information for a primary RA procedure; receiving, from the base station, secondary RA configuration information for a secondary RA procedure; transmitting a primary RA preamble to the base station by using a primary RA resource indicated by the primary RA configuration information; receiving, from the base station, secondary RA indication information in response to the primary RA preamble, the secondary RA indication information indicating to perform the secondary RA procedure instead of the primary RA procedure; and transmitting a secondary RA preamble to the base station by using a secondary RA resource indicated by the secondary RA configuration information.

Method and apparatus for random access in communication system

An operation method of a communication node in a millimeter-wave based communication system may comprise when a first communication path between the second base station and the terminal connected to the first base station is not established, transmitting a radio resource control (RRC) request message requesting establishment of the first communication path to the second base station via the first base station; receiving an RRC response message from the second base station via the first base station, the RRC response message being a response to the RRC request message; and establishing the first communication path based on the RRC response message.

Operation method of communication node in millimeter wave based communication system

An operation method of a first communication node connected to a first hub in a communication network may comprise measuring signal qualities for a first radio signal received from the first hub and a second radio signal received from a second hub adjacent to the first hub; calculating a difference in the signal qualities for the first radio signal and the second radio signal; comparing the calculated difference with a plurality of predetermined threshold values for handover of the first communication node; and performing a handover-related procedure indicated by one of the plurality of predetermined threshold values based on a result of the comparison.

Operation method of communication node in communication network

A method of positioning a terminal includes: receiving a first radio signal generated through beamforming from a base station; obtaining a cell ID and a beam ID from the first radio signal; obtaining a received signal intensity of the first radio signal; and estimating a first position of the terminal by comparing a fingerprint in which a cell ID, a beam ID, and a received signal intensity are mapped to each point on a map with the cell ID, the beam ID, and the received signal intensity obtained from the first radio signal.

Positioning system and method

Disclosed is a first electronic device and the first electronic device includes: a transmitter transmitting data to a second electronic device; a receiver receiving a feed-back (hereinafter, referred to as a first feed-back) for the transmitted data from the second electronic device; and a processor deciding whether to transmit the data again or another data to the second electronic device, based on the first feed-back, in which when the first feed-back is negative, the transmitter retransmits the data under a predetermined condition, and when a feed-back (hereinafter, referred to as a second feed-back) received from the second electronic device is negative with respect to the data retransmitted under the predetermined condition, the transmitter re-retransmits at least a part of the data to the second electronic device.

Method of re-transmitting data and electronic device therefor

In a communication environment using a millimeter wave band, a method and apparatus that enable a base station to process data are provided. A protocol stack is generated based on a characteristic of traffic that is provided to a terminal, and the generated protocol stack is allocated to the terminal. Data to be provided to the terminal is processed according to the generated protocol stack, and data that is processed through a beam that is allocated based on a position vector of the terminal is transmitted.

Method and apparatus for processing data in base station

In a mobile communication network, after a target beam is determined based on signal intensity of a serving beam and a candidate beam, when the serving beam and the target beam are operated in the same base station, a terminal performs a beam switching procedure in a layer 2.

Method and apparatus for beam switching in mobile communication network

A terminal receives access priority information on a plurality of sub-beams configuring a beam from a base station, selects one of a plurality of beams, and selects one of a plurality of sub-beams of the selected beam on the basis of the access priority information to perform a random access.

Method and apparatus for initial access in mobile communication system

A method and apparatus for allocating a resource in a heterogeneous network environment are provided. In a heterogeneous network environment in which small cells and a macrocell are mixed, a macro base station divides an entire frequency band that is allocated to a corresponding macrocell into a plurality of Frequency Partitions (FPs). The macro base station allocates some of the plurality of FPs to small cells that are included in the macrocell.

Method and apparatus for allocating resource in heterogeneous network

A terminal starts a first timer for detecting an RLF (Radio Link Failure) when signal strength of a serving base station is lower than a reference value. The terminal triggers a handover without a TTT (Time to Trigger) for handover when signal strength of a target base station is greater than the signal strength of the serving base station by a first offset or more while the first timer is running. The terminal transmits a measurement report message regarding the signal strength of the target base station to the serving base station when a handover is triggered.

Method of handover in mobile communication system

A base station of a mobile communication system divides an ultra wideband into a plurality of unit bands, uses a plurality of beam component carriers corresponding to the L3 CP dedicated unit band as a coverage layer by grouping in one cell in the L3 CP dedicated unit band and uses a plurality of beam component carriers corresponding to the UP dedicated unit band in the UP dedicated unit band as a plurality of capacitor layers by grouping in a plurality of cells of a smaller size than that of the grouping.

Radio resource management apparatus of base station in mobile communication system and method of managing the same

Provided is a network access management method of a terminal, the method including determining whether a terminal located adjacent to a railway dedicated wireless communication network is a common terminal or a railway dedicated terminal, based on a unique identifier (ID) of the terminal, and handing over the terminal to a different communication network allowing an access based on a result of the determining.

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Daejeon, South Korea

Yong Seouk Choi