Samsung Electronics Co., Ltd.

Yu-Suk Yun

Soon-Young Yoon

Hee-Won Kang

Hoon Huh

Jae-Heung Yeom

Sang-Hyun Yang

Seung-Joo Maeng

Ho-Kyu Choi

Youn-Sun Kim

Young-Ky Kim

Sung-Kwon Jo

Myung-Kwang Byun

Jae-min Ahn

Jae-Sung Jang

Hwan-Joon Kwon

Dong-Hee Kim

Dae-Gyun Kim

Hoon Hee Han

Hoon Suk Chang

Jong-Hyeuk Lee

Joong-Ho Jeong

Hyun-Cheol Kim

Hyo-Chul Kwak

Alfred Lin

Wei Chung Peng

Jae-Min Anh

Soon Young Yoon

Ho-Kyu c/o Samsung Electronics Co Ltd Choi

Soon-Young c/o Samsung Electronics Co Ltd Yoon

Hee-Won 401-1503 Ahleum Samho Apt Kang

Seung-Joo Maehwamaeul 201-1001 Yatap-Dong Maeng

A method for communicating with a network by a terminal in a wireless communication system, wherein the terminal receives, from the network, signaling information representing a transmission period and a time offset for uplink transmission of a feedback information, and determines a time to transmit the feedback information based on the transmission period and the time offset. The terminal transmits the feedback information to the network based on the determined time.

Apparatus and method for gating transmission of a data rate control channel in an HDR mobile communication system

Provided are an apparatus and method for receiving a multipath signal in a wireless communication system. The apparatus includes a weighting block for receiving an estimated channel gain value output from a channel estimator and outputting an estimated weighted channel gain value and a compensator unit for receiving the estimated weighted channel gain value, reflecting the weight, and compensating, for an estimated channel gain.

Apparatus and method for receiving multipath signals in wireless communication system

Uplink power control in a broadband wireless access system is provided. A Base Station (BS) includes a controller, a first generator, a second generator, and a modulator/demodulator (modem). The controller determines to apply one of a first power control which is slot-periodic and a second power control which is frame-periodic. The first generator generates a first power control command at a slot period using a channel quality premising a rake receiver according to the first power control. The second generator generates a second power control command at a frame period using a channel quality premising an equalizer according to the second power control, and generates a third power control command according to a predefined pattern at a slot not being able to use the channel quality. The modem transmits at least one of the first, second, and third power control commands.

Apparatus and method for power control in broadband wireless access system

An apparatus and a method for estimating a channel in a mobile communication system are provided. The apparatus includes a channel estimation unit for determining a channel estimation value using a channel power for each of a plurality of fingers, and a noise estimation unit for selecting a scheme for estimating a thermal noise power according to a channel environment among schemes for determining a plurality of thermal noise powers, and for estimating a noise using the channel estimation value in the selected scheme.

Apparatus and method for estimating channel in mobile communication system

A communication method in a mobile communication system in which an access terminal transmits to an access network DRC information indicating a selected one of forward data rates requested by the access terminal is provided. The access network designates a DRC information length DRCLength indicating a number of slots where the DRC information is repeated and transmits the designated DRC information length to the access terminal. The access terminal gates transmission of DRC information to the access terminal at one time slot in every DRC information length received from the access network.

A method of adapting a mobile telecommunication system to channel conditions. To control transmission of a data packet from an access network (AN) in both a link adaptation scheme and an ARQ (Automatic Repeat reQuest) scheme, an access terminal (AT) compares the received power of a forward pilot signal received from the AN with a predetermined first threshold, checks errors in the data packet of a received time slot if the reception power is greater than the first threshold, and transmits a signal requesting termination of retransmission of the data packet to the AN if no errors are found in the data packet after decoding.

Method and apparatus for controlling packet transmission in a mobile telecommunication system

Disclosed is an apparatus for performing power control on a reverse channel quality indicator channel (CQICH) received from a mobile station by a base station in a mobile communication system including the base station for transmitting a power control bit for power control on reverse channels and the mobile station for controlling transmission power of the reverse channels according to the power control bit. An erasure detector determines whether to perform an erasure process by measuring reception power of the reverse channel quality indicator channel. An erasure rate calculator accumulates the erasure-determined result for N slots and calculates an erasure rate for the N slots. A control bit generator determines a ratio control bit to be transmitted to the mobile station according to the erasure rate, to issue a command to increase or decrease a CQICH traffic-to-pilot ratio.

Apparatus and method for controlling power of reverse channels in a mobile communication system

A method and apparatus for controlling transmission of an RPC channel during a handoff in a mobile communication system. Only one AN is selected among a plurality of ANs to transmit reverse power control information to an AT. For this purpose, a Forward Link Selection message received at an AN from an RNC can be used. Alternatively, a DRC cover received at an AN from an AT can be used. The DRC cover indicates at least one of ANs excluding an AN having the worst channel condition for the AT.

Method and apparatus for controlling transmission of reverse power control channel in a mobile communication system

There is provided a method and apparatus for selecting an appropriate base station and an optimal data rate to provide a voice service and a data service based on a voice service load in a CDMA system. A base station transmits two pilot signals orthogonally spread with different orthogonal codes in association with its voice service load, and a mobile station estimates the voice service load based on a pilot power ratio.

Apparatus and method for reporting service load to mobile station in mobile telecommunication system

A method for transmitting a frame comprised of a plurality of slots over a dedicated control channel in a duration where there is no transmission message from a mobile station to a base station. Each slot in the frame is comprised of a first slot duration and a second slot duration. The first slot duration is provided with a power control signal and the second slot duration is provided with no signal at a partial duration thereof.

Apparatus and method for gated transmission in CDMA communication system

A communication method in a mobile communication system in which an access terminal transmits to an access network DRC information indicating a selected one of forward data rates requested by the access terminal is provided. The access network designates a DRC information length DRC Length indicating a number of slots where the DRC information is repeated and transmits the designated DRC information length to the access terminal. The access terminal gates transmission of DRC information to the access terminal at one time slot in every DRC information length received from the access network.

An apparatus and method for transmitting forward link data to a handoff mobile station in a CDMA communication system. A service sector for the handoff mobile station registers the other sectors in the active set of the handoff mobile station as idle sectors upon request of a data service from the handoff mobile station, and transmits data traffic to the handoff mobile station, while the sectors designated as idle sectors discontinue transmission of data traffic and transition to an idle state.

Apparatus and method for transmitting forward link data to a handoff mobile station in a CDMA communication system

A method for assigning orthogonal codes used for a first system and a second system in a CDMA system including channels of the first system for spreading a pilot signal, a sync signal, a paging signal and a traffic signal with a first set of orthogonal codes corresponding to orthogonal code numbers in different rows from a set of orthogonal codes arranged in a matrix of m rows and m columns, and channels of the second system for spreading a second set of orthogonal codes corresponding to orthogonal code numbers different from said orthogonal code numbers for the first set of orthogonal codes. The orthogonal codes for the second system are transmitted at a data rate higher than a data rate of the first system. The method comprises the steps of: assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of 2n rows to the channels of the first system, wherein a set of the orthogonal codes are arranged in a matrix of subsets of orthogonal codes and inversed orthogonal codes, each subset including 2n rows and 2n columns; and assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of the remaining rows to the second system.

Apparatus and method for transmitting and receiving data in a CDMA communication system

A device and method for continuous outer-loop power control on a physical channel which transmits only power control bits and no data while in discontinuous transmission (DTX) mode in a CDMA mobile communication system is disclosed. In the power controlling device according to one aspect of the present invention, a frame error detector detects an error from a frame of predetermined length and generates an error signal indicating whether an error has been generated. A closed-loop power controller compares a threshold with the signal-to-noise ratio (SNR) in each power control group (PCG) in a plurality of periods of the frame and generates power control information according to the comparison result. An outer-loop power controller increases the threshold in order to generate power control information that commands a power increase in response to an error signal indicating the existence of a frame error, and decreases the threshold in order to generate power control information that commands a power decrease in response to an error signal indicating the absence of a frame error. An offset controlling unit, which is connected to the outer-loop power controller, receives gating information about the gated transmission of data in a frame at a predetermined rate, and generates an offset signal, which indicates an offset corresponding to a changed gating rate if the gating rate is changed.

Growing community of inventors

Seoul, South Korea

Yu-Suk Yun