Samsung Electronics Co., Ltd.

Kmw Inc

Kolon Industries, Inc.

Jong-Han Kim

Hi-Chan Moon

Sang-Min Bae

Jin-Soo Park

Dong-Hun Lee

Ji-Won Ha

Seong-Woo Ahn

Jong-Yoon Hwang

Jin-Woo Heo

Yong-Duk Cho

Soon-Young Yoon

Jung-Dal Choi

Young-Chan Moon

Jin-Woo Choi

Dong-jun Kim

Su-Won Park

Jae-Heung Yeom

Soo-Bok Yeo

Sung-Hwan So

Jae-Hyung Lee

Ki-Hyun Do

Ki-Hoon Woo

Wang-Chul Shin

Jeong-Gyun Yu

Young-Seo Yoon

Ji-myung Jung

Dae-Cheol Kwon

Seo-Won Heo

Goog-Seong Jeong

Myoung-sik Lee

Seol-A Yu

Kang-Ryoung Lee

Ji-Myung Jung

Myoung-Sik Lee

Methods and apparatuses are provided for searching for a cell by a communication processor (CP) of a wireless terminal having a plurality of antennas. One of the plurality of antennas is selected based on whether a secondary antenna is in a driving state and whether a finger of a rake receiver has been allocated. The plurality of antennas includes a primary antenna and the secondary antenna. A cell search is performed through the selected one of the plurality of antennas.

Apparatus and method for searching for cell in wireless terminal

The present invention is an antenna system of a mobile communication base station, comprising: a signal separation unit which is arranged within a radome of an antenna, and which separates a synthetic signal of a wireless signal transmitted from a main system of a base station through a feeder cable, a direct current power signal and a control signal having a preset format for controlling the antenna, in such a manner that the direct current power signal and the control signal are output by being separated from the wireless signal and the wireless signal is provided to an antenna unit; and equipment to be remotely controlled having a modem for receiving the direct current power signal and the control signal output from the signal separation unit and using the direct current power signal as an operating power and converting the control signal into a format which is preset to be internally recognizable in the radome of the antenna, the equipment to be remotely controlled performing an antenna control operation according to a control signal.

Antenna system of mobile communication base station

The present disclosure in some embodiments provides an antenna line device installed in each antenna apparatus of a multiple antenna system, including a control part for controlling according to control signal from a base station body, and at least two of a DC ping part, RF ping part and domain detection part. The DC ping part is configured to include an electrical element installed in an operating power transfer path to cause a voltage drop, and to detect an operating power level before or after the voltage drop caused by the electrical element under the control of the control part. The RF ping part is configured to check a connection of feeder lines to corresponding antenna arrays by detecting signals inputted through the feeder lines under the control of the control part. The domain detection part includes a switch configured to be installed in a control data transfer path and to be turned on/off for identifying an antenna apparatus that covers each coverage sector.

Apparatus for controlling antenna of mobile-communication base station

A method of reducing power consumption is provided. The method includes categorizing a plurality of cells including a serving cell into an identified cell set and a non-identified cell set based on received power of the plurality of cells, measuring received power of the plurality of cells including the serving cell based on a first measurement period during a first time interval, determining whether received power of the serving cell is greater than a predefined threshold or whether a number of cells included in the identified cell set or a configuration of the plurality of cells changes, or if one of the received power of the serving cell is greater than the predefined threshold and if the number of cells included in the identified cell set or the configuration of the plurality of cells does not change, changing the first measurement period to a second measurement period.

Method of reducing consumption of standby current in a mobile terminal

Methods and apparatuses are provided for cell reselection at a mobile terminal. A first cell measurement is performed with respect to a serving cell and a first set of one or more cells included in a neighbor cell list. A second cell measurement is performed to detect a second set of one or more cells that are not included in the neighbor cell list, based on the first cell measurement. One or more candidate cells that satisfy cell reselection criteria are determined from among the first set of one or more cells and the second set of one or more cells. One of the one or more candidate cells is reselected.

Mobile terminal for cell reselection in cellular mobile communication system and methods therefor

The present invention relates to polyalkylsilsesquioxane particulates and a method of preparing the same, and more particularly provides the polyalkylsilsesquioxane particulates, of which moisture content is low, water repellency is high, and hygroscopic property in storage is low, and a method of preparing the same by end-capping silanol groups (SiOH) on the surface of the polyalkylsilsesquioxane particulates with alkyl groups by adding an alkoxytrialkylsilane having a triorganosilyl group thereto.

Polyalkylsilsesquioxane particulates and a preparation method thereof

An apparatus and method for measuring an SIR in a CDMA mobile communication system. The SIRs and power of PICHs and the power of PDCHs are measured sequentially for a plurality of active set base stations. An active set base station having the highest signal strength is selected according to the measurements. Thus a data rate is determined adaptively to the SIR for efficient high rate packet data transmission.

Apparatus and method for measuring a received signal to interference ratio in a mobile communication system

An apparatus and method for transmitting packet data in a high-speed packet transmitting mobile communication system. In the packet data transmitting apparatus, a packet data channel generator processes packet data to be transmitted on a packet data channel, a preamble signal generator transmits a preamble signal according to a gain of the packet data channel, a select signal generator generates a select signal to transmit the preamble signal a predetermined time before transmitting the packet data, and a multiplexer outputs the preamble signal upon receipt of the select signal and the packet data in time division when the select signal is not received.

Apparatus and method for transmitting packet data in a high-speed packet transmitting mobile communication system

An apparatus and method of detecting whether data exists in a received signal while a mobile communication terminal is in discontinuous transmission mode. The apparatus and method comprises generating and transmitting a forward power control command for providing the forward power control, and performing forward power control in a mobile communication system. According to the forward power control method, a power control command is generated based on a received frame including a plurality of slots each of which includes power control bits. The ratio of the power control bit energy to noise energy, which is given by a ratio of the accumulated energy of the power control bits in the slots of the received frame to an accumulated energy value of noise in the slots of the received frame, is provided, and the power control command based on a ratio of the accumulated energy value of traffic symbol bits in the slots to the accumulated energy value of the power control bits is generated when the provided ratio of the power control bits to noise is acceptable.

Apparatus and method of controlling forward link power when in discontinuous transmission mode in a mobile communication system

An apparatus for detecting a frame transmission period in a CDMA mobile communication system supporting a discontinuous transmission mode. A first frame detector performs primary frame detection by calculating a signal-to-interference ratio (SIR) using traffic symbol energy, pilot symbol energy and noise energy measured for a predetermined time period, and comparing the SIR with a predetermined frame detection threshold value. A decoder calculates a symbol error rate (SER) by decoding symbols received for the predetermined time period. A second frame detector selects an SER threshold value according to frame detection information from the first frame detector, and compares the selected SER threshold value with the SER to determine whether a frame has been transmitted.

Apparatus and method for detecting discontinuous transmission period in a CDMA mobile communication system

There is provided an apparatus and method for using QOF (Quasi-Orthogonal Function) Walsh codes when enough orthogonal Walsh codes are not available for a packet data service in a mobile communication system supporting concurrent provision of a high rate packet data service and a circuit call service. A data rate (DR1) in the case of using available orthogonal Walsh codes is first obtained. Then, a data rate (DR2) in the case of using QOF Walsh codes is obtained considering a power reduction factor due to the increase of interference involved with the use of the QOF Walsh codes. Packet data is transmitted at a higher data rate of DR1 and DR2. At the same time, information about the selected data rate and information about whether the QOF Walsh codes are used or not are transmitted.

Apparatus and method for transmitting packet data using walsh codes in a mobile communication system

An apparatus for detecting an on-off keying signal in a CDMA mobile station device is disclosed. A first calculator receives an on-off keying signal and a reference signal transmitted from a base station transmitter at a given transmission power level, despreads the received on-off keying signal, and generates a symbol power level of the despread on-off keying signal. A second calculator despreads the reference signal and generates a power level of the despread reference signal. A multiplier generates a variable threshold value by multiplying the power level of the despread reference signal by a gain determined by a ratio of the transmission power of the reference signal from the base station transmitter to the transmission power of the on-off keying signal from the base station transmitter. A comparator compares the variable threshold value with the symbol power level of the despread on-off keying signal. Further, a symbol detector detects the symbol of the on-off keying signal by comparing a comparison value from the comparator with a prescribed threshold value.

Apparatus and method for detecting a received on-off keying signal in a CDMA mobile communication system

An apparatus and method of detecting whether data exists in a received signal while a mobile communication terminal is in discontinuous transmission mode is disclosed. The apparatus and method comprises generating and transmitting a forward power control command for providing the forward power control, and performing forward power control in a mobile communication system. According to the forward power control method, a power control command is generated based on a received frame including a plurality of slots each of which includes power control bits. The ratio of the power control bit energy to noise energy, which is given by a ratio of the accumulated energy of the power control bits in the slots of the received frame to an accumulated energy value of noise in the slots of the received frame, is provided, and the power control command based on a ratio of the accumulated energy value of traffic symbol bits in the slots to the accumulated energy value of the power control bits is generated when the provided ratio of the power control bits to noise is acceptable.

A receiving device for a mobile station receives signals transmitted from a base station having a time-switched transmission diversity (TSTD) function. In the receiving device, a despreader despreads channel signals which have been transmitted in a TSTD mode of operation. A pilot separator separates a pilot signal from the despread channel signals. A channel estimator generates a channel estimation signal by selecting pilot signals transmitted from a same antenna of a transmitter according to a TSTD pattern of the transmitter. A compensator compensates the channel signals with the channel estimation signal.

Device and method for mobile station for receiving signals transmitted from a base station

A base station transmitter for a CDMA communication system which includes a superframe period of a sync channel, a plurality of first sync channel frames segmented from the superframe period, the first sync channel frames each having a first period, and a plurality of second sync channel frames segmented from the first sync channel frames, the second sync channel frames each having a second period, wherein sync channel signals are transmitted through the second sync channel frames. The base station transmitter comprises a circuit for generating the sync channel signals; and a channel spreader for channel spreading a sync channel signal in a leading sync channel frame out of the second sync channel frames in said each first sync channel frame with a first orthogonal code, and channel spreading sync channel signals in the remaining sync channel frames with a second orthogonal code.

Growing community of inventors

Yongin-shi, South Korea

Jong-Han Kim