Samsung Electronics Co., Ltd.

Nokia Technologies Oy

Si-Hyun Park

Hee-Won Kang

Hwa-Sun You

Jae-Hee Cho

Yong-Seok Kim

June Moon

Sang-Heon Kim

Soon-Young Yoon

Jeong-ho Park

Jae-Weon Cho

Kwan-Hee Roh

Chung-Ryul Chang

Byung-Wook Jun

Young-Bo Cho

Seong-Hyeon Chae

Yon-Woo Yoon

Yun-seoph Kim

Min-Ho Jang

Seung-Seop Shim

Deok-Nam Kim

Sang-U Shim

An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode.

Apparatus and method for transmitting and receiving fast feedback information in broadband wireless communication system

A method for performing timing synchronization error compensation by a base station in a communication system, in which if there is a need for timing synchronization error compensation of a user equipment, the base station generates a message related to the timing synchronization error compensation, and broadcasts the generated message to the user equipment. In this manner, the base station can notify the user equipment of the need for timing synchronization error compensation in the communication system.

Method and apparatus for compensating for timing synchronization error in a communication system

A method and apparatus for using a guard band as a data subcarrier in a communication system supporting frequency overlay are provided. In a method of operating mobile station for using a guard band as a subcarrier for signal transmission in a communication system supporting frequency overlay, the method includes searching for a first center frequency located at a position corresponding to an integer multiple of a subcarrier spacing, after searching for the first center frequency, receiving information indicating the numbers nand nof first additional subcarriers, and performing a first network entry process by using all subcarriers including the first additional subcarriers.

Apparatus and method for using guard band as data subcarrier in communication system supporting frequency overlay

A channel estimation method of a channel estimation apparatus in a wireless communication system is provided. The method includes predefining a plurality of weight tables about at least one of a speed and a Carrier to Interference-and-Noise Ratio (CINR) using a correlation value considering offset compensation; selecting a weight table to be used for channel estimation based on at least one of the estimated speed and the CINR, from the plurality of weight tables; and multiplying a pilot channel estimation value and the selected weight table, and performing data channel estimation.

Apparatus and method for MMSE channel estimation in consideration of offset compensation in wireless communication system

An apparatus and a method for estimating a Noise and Interference (NI) power in a communication system are provided. The method includes, calculating average values of impulse responses according to ranging codes, through use of a ranging signal sequence received through a resource allocated to a ranging channel, arranging the average values of the impulse responses according to ranging codes in order of the highest value to the lowest value, and multiplying a ranging code, which corresponds to an impulse response having an (x+1)peak value among the arranged average values of the impulse responses, by a specific threshold value, and estimating the NI power, wherein 'x' represents a number of ranging codes which can be simultaneously received by one ranging channel.

Apparatus and method for estimating noise and interference power in communication system

A method and apparatus for performing channel estimation in a wireless communication system, in which a channel estimate of each pilot tone included in adjacent first and second resource allocation blocks is calculated. Channel estimates of first pilot tones are detected, which have a predetermined subcarrier spacing or less from the second resource allocation block, channel estimates of second pilot tones are detected; and which have a predetermined subcarrier spacing or less from the first resource allocation block. The channel estimates of the first and second pilot tones are updated, and channel estimation is then performed using the updated channel estimates.

Method and apparatus for performing channel estimation in a wireless communication system

A Handover apparatus and method of a Mobile Station (MS) in a wireless communication system in which at least one small cell resides in a macro cell includes, when entering a neighboring small cell, checking a movement speed of the MS. The method also includes determining whether to hand over to the small cell by taking into account the movement speed of the MS. When it is determined not to hand over to the small cell, that MS transmits small cell penetration information to a macro Base Station (BS); allocates a macro only resource from the macro BS; and communicates with the macro BS in the small cell using the macro only resource allocated from the macro BS.

Apparatus and method for operating small cell in wireless communication system

A broadband wireless communication system using a plurality of Frequency Allocations (FAs) is provided. A method for packet transmission of a packet of a transmitting end includes dividing one encoded packet into a plurality of parts, mapping a plurality the plurality of parts of the packet to the FAs through the plurality of different FAs transmission, when a re-transmission request is received, re-mapping the plurality of parts of the packet to the FAs such that at least one of the at least one of the plurality of parts is re-mapped to an FA that is different than an FA previously mapped thereto. Retransmitting the encoded packet by at least one of a number of subunits.

Apparatus and method for supporting hybrid automatic repeat request in a broadband wireless communication system

Provided is an apparatus and method for scheduling for collaborative spatial multiplexing in a broadband wireless communication system. An apparatus for a base station for supporting collaborative spatial multiplexing in a broadband wireless communication system includes a controller, an estimator, and a determiner. The controller selects a second mobile station with the best channel quality among non-scheduled mobile stations. The estimator estimates a load and transmitting (TX) power of the second mobile station. The determiner is used to adjust a modulation and coding scheme (MCS) level of the second mobile station so that a total load of first and second mobile stations when coupled does not exceed a first threshold value and also the power of the second mobile station does not exceed a second threshold value.

Apparatus and method for scheduling for collaborative spatial multiplexing in a broadband wireless communication system

An apparatus and method for deciding a target Packet Error Rate (PER) in a wireless communication system are provided. The method includes setting a target PER, comparing a variance of the target PER (&#x394;p(k)) with a previous target PER variance (&#x394;p(k&#x2212;1)), and updating a next target PER variance (&#x394;p(k+1)) using an average capacity and a previous average capacity in accordance with the comparison result between the target PER variance (&#x394;p(k)) and the previous target PER variance (&#x394;p(k&#x2212;1)).

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Hwaseong-si, South Korea

Si-Hyun Park