Innowireless Co., Ltd.

Qucell Networks Co., Ltd.

Jin Soup Joung

Yong Hoon Lim

Seung Hwan Ji

Kyoung Hwan Ju

Joo Hyeong Lee

Sung Chan Choi

Jae Hyun Park

Jong Min Kim

Hee Jun Lee

Byung Kwan Jang

Myung Jong Kim

Hyun Seok Lee

Young Su Kwak

Young Su Chae

Kyeong Min Ha

Cheol Jin Lee

Jin Man Kim

Seung-Hwan Ji

Beom-Sik Kim

Chang Woo Seo

Oh Keol Kwon

Myung Gu Kang

Jong Tae Chung

Ro Mi Choe

Hyun Seok Cho

Hong Gil Kim

Hyo Bin Yim

Kyung Min Ha

Seung Man Lee

Seung Yeup Chae

Seo Kyun Jang

Yong Hee Kim

Sang-lk Cho

Sung Lyong Lim

GiHo Yun

Woong Jong Jeong

Chang Bok Yang

A method of providing a synchronization signal to at least one small cell includes receiving a synchronization reference signal; extracting a synchronization signal from the synchronization reference signal; generating a network listening (NL) synchronization signal based on the synchronization signal; and transmitting the NL synchronization signal for reception by the at least one small cell.

Method and device for synchronizing small cell

Provided is a channel simulator having a function of supporting a carrier aggregation and a carrier aggregation block used for the same to support a carrier aggregation function at a minimum path loss without reducing the number of valid connectable terminals. The channel simulator includes: a terminal interface block connected to each of at least four terminals through at least two transmission/reception ports; a carrier aggregation block including unit modules each including one RF coupler and one RF switch, and interposed between the terminal interface block and the terminal to support the carrier aggregation for one to four component carriers; and a management server. The carrier aggregation block includes a front-end carrier aggregation unit and a rear-end carrier aggregation unit.

Channel simulator having function of supporting carrier aggregation and carrier aggregation block used for the same

A resource allocation algorithm and operation procedure for user equipment (UE) to efficiently report cell global identity (CGI) information to an evolved node base station (eNB) in an automatic neighbor relation (ANR) operation procedure in a wireless communication system. According to an operating method of an eNB for CGI information reporting in a wireless communication system, a serving eNB receives a CGI information report and perform an ANR operation to maintain service quality through effective handover of UE at the edge of the service area of the serving eNB. When there is uplink/downlink data, the serving eNB stops data allocation to the UE and requests measurement reports (MRs) of neighbor eNBs, and the UE can be switched to a discontinuous reception (DRX) state during a DRX-inactivity time. Accordingly, it is possible to ensure decoding of a broadcast channel (BCH) of a neighbor cell and report CGI information.

Operating method of ENB for CGI information reporting in wireless communication system

A shield box for wireless terminal test is provided to simply perform various tests with high reliability even in a non-contact (wireless) connection state with an antenna of a wireless terminal. The shield box includes a metallic box having an internal wireless terminal receiving space therein, and a probe antenna which is provided in the metallic box, and located right above or right below an antenna part of a wireless terminal received in the metallic box to receive a signal from a wireless terminal antenna in a non-contact manner. The metallic box is provided therein with an electronic wave absorber. The probe antenna is a patch antenna. The metallic box includes two parts of upper and lower cases including metallic materials, respectively, such that the metallic box is openable. The upper and lower cases are hinged with each other on rear surfaces thereof.

Shield box for wireless terminal test

Provided is a control method for a channel simulator, capable of expanding a processable dynamic range of an uplink signal receiving unit while adopting an A/D converter (ADC) having low resolution by adjusting an attenuation amount of the uplink signal receiving unit in a large-capacity channel simulator having P base stations and Q terminal interfaces. In a control method for a channel simulator that includes P base station interface cards (BS I/F cards) (P&#x3e;2; P is an integer), a link processor block, and Q user equipment interface cards (UE I/F cards) (Q&#x3e;2; Q is an integer) to form channels with respect to all paths between P base stations and Q terminals, the control method for the channel simulator according to the present invention includes: (a) establishing a table representing an attenuation amount offset in an uplink signal receiving unit of the UE I/F card over a path loss based on log data with respect to terminal transmission power over the path loss for eliminating change of the path loss exerting an influence upon the terminal transmission power; (b) searching for a specified path loss value from the table established in step (a) to determine an attenuation amount corresponding to the specified path loss value when a path loss value with respect to an uplink signal processing process is specified; and (c) adjusting an attenuation amount in the uplink signal receiving unit of the UE I/F card based on the attenuation amount determined in step (b).

Channel simulator using path loss of terminal transmit power to establish attenuation amount in uplink signal to base station

Provided is a method of calibrating a power for a multiple input and multiple output-orthogonal frequency division multiplexing transmitter having a plurality of antennas via a measurement equipment, the method including: receiving a cyclic delay diversity (CDD) signal simultaneously output from the transmitter to obtain a starting point of a frame of a corresponding signal; performing a fast Fourier transform on a sample proceeded from the starting point by an extent of a maximum CDD delay; calculating a channel coefficient; calculating a channel impulse response and a power of the channel impulse response; converting CDD delay values of each antenna into values in units of samples by using a sampling rate in the channel impulse response; mapping a peak point position of the channel impulse response to each antenna using CDD delay sample values; and simultaneously performing a power calibration of each antenna based on each peak point power.

Method of calibrating power for MIMO-OFDM transmitter

Provided is a method for measuring a throughput of a backhaul network. The method includes: estimating an available bandwidth of a backhaul network; determining the sizes (P) of packet trains by using the estimated available bandwidth; and calculating a virtual throughput of the backhaul network by using at least one parameter by transmitting N packet trains having the determined sizes to the backhaul network (N is a natural number that is equal to or greater than 2).

Method and appratus for measuring a throughput of a backhaul network

Provided is a method of processing a Wideband Code Division Multiple Access (WCDMA) signal timing offset for a signal analyzer. The method includes estimating an integer multiple timing offset of WCDMA baseband sample data corresponding to an amount of at least one frame; generating a frequency domain signal which is time delayed corresponding to a fractional timing offset estimation resolution after generating the frequency domain signal by performing a Fast Fourier Transform (FFT) calculation on an already-known reference signal; converting each time-delayed frequency domain signal into a time domain signal by performing an Inverse Fast Fourier Transform (IFFT) calculation on each time-delayed frequency domain signal and calculating a correlation between an input signal from a position of the integer multiple timing offset and the time domain signal; and estimating a delay time leading to a maximum correlation as a fractional timing offset.

Method of processing WCDMA signal timing offset for signal analyzing equipment

A calibration method for a channel simulator is applied to a large-capacity channel simulator having the interfaces of P base stations and Q terminals so that path loss calibration for P&#xd7;Q paths is more rapidly and easily performed.

Calibration method for channel simulator

Provided is a method of blindly estimating WCDMA OVSF of a signal analyzer, which includes: (a) setting SF to 512 and an index thereof to 0; (b) calculating a power average value of a symbol obtained by despreading descrambled data with an OVSF code set by increasing the index from '0' by '1'; (c) determining an OVSF code by which the power average value is equal to or greater than a power reference value as a used OVSF code candidate and determining an OVSF code by which the power average value is less than the power reference value as an unused OVSF code; (d) comparing a zero crossing rate of a symbol with a reference value to determine whether the OVSF code candidate is the used OVSF code; and (e) repeating (b) to (d) while reducing the SF half by half until the SF is equal to 4.

Method of blindly estimating WCDMA OVSF code for signal analyzer

An apparatus and method for detecting a cable fault which simultaneously apply a plurality of measurement frequencies mutually orthogonal to a cable and estimate reflection coefficients at the measurement frequencies using filters for filtering only the respective measurement frequencies to reduce a time taken to detect a cable fault.

Apparatus and method for detecting cable fault

An apparatus for efficiently and simply measuring an error vector magnitude (EVM) of a physical hybrid automatic repeat request (ARQ) indicator channel (PHICH) in a long term evolution (LTE) system. The apparatus includes an overall PHICH group data extraction unit configured to extract all PHICH group data from a received signal in a first subframe, an overall PHICH group analysis unit configured to detect orthogonal sequences and acknowledgement/negative acknowledgement (ACK/NACK) bits used in respective PHICH groups by analyzing all resources of the extracted PHICH group data, an ideal PHICH group sequence generation unit configured to generate an ideal PHICH group sequence using the detected ACK/NACK bits and orthogonal sequences, and an EVM measurement unit configured to measure an EVM of a PHICH using the ideal PHICH group sequence and the received signal.

Apparatus for measuring EVM of PHICH in LTE system

Provided is a long term evolution (LTE) femtocell based content service system and a driving method thereof, which include user equipment (UE) connected to an evolved packet core (EPC) network that is a core network through routes, that is, a radio network subsystem (RNS) and a home eNode subsystem (HeNS) having a femtocell and a content service server connected to the EPC network and configured to receive system information including PCI, U_DL BW, Cell ID, TAC, HeNB Name and SNR, and query data from the user equipment (UE), retrieve corresponding content with reference to the received system information and query data, and provide the corresponding content to the user equipment (UE).

Long term evolution femtocell based content service system, and driving method thereof

Provided is a method of controlling an uplink noise level in a multi-radio unit (RU) environment in which each RU measures an ordinary noise level using a power monitoring function thereof when there is no user traffic and then controls an uplink noise level based on the ordinary noise level.

Method of controlling uplink noise level in multi-RU environment

Provided is a media access control processing unit (MAC) sharing method applied to a fifth generation (5G), which is a next generation, mobile communication system and making it possible to efficiently share a plurality of MACs so as to efficiently distribute and process traffic of user equipment (UE).

Growing community of inventors

Gyeonggi-do, South Korea

Jin Soup Joung