公开(公告)号：KR1020120063416A

公开(公告)日：2012-06-15

申请号：KR1020110049209

申请日：2011-05-24

Applicant: 한국전자통신연구원

Inventor： 원석호 ,  권선형 ,  김호겸 ,  임종수 ,  홍진우

IPC: H04B7/26 ,  H04L27/00 ,  H04L1/18 ,  H04N21/2662

CPC classification number: H04W28/0231 ,  H04L47/805 ,  H04N21/2662

Abstract: PURPOSE: A multimedia data transmission apparatus in a wireless network and method thereof are provided to improve end-to-end QoS(Quality of Service) by dividing a media layer into an SVC(Scalable Video Coding) necessary layer and an improved layer. CONSTITUTION: Multimedia data divided by a layer is received(S1101). Different wireless bearer channels are established in a multimedia layer(S1102). A QoS parameter for the wireless bearer channel is differently applied. The QoS parameter includes a QCI(QoS Class Identifier) and ARP(Allocation Retention Priority). The multimedia data is divided into a necessary layer and an improved layer.

Abstract translation: 目的：提供一种无线网络中的多媒体数据传输装置及其方法，用于通过将媒体层划分为SVC（可扩展视频编码）必需层和改进层来改善端到端QoS（服务质量）。 构成：接收一层划分的多媒体数据（S1101）。 在多媒体层中建立不同的无线承载信道（S1102）。 不同地应用无线承载信道的QoS参数。 QoS参数包括QCI（QoS类标识符）和ARP（分配保留优先级）。 多媒体数据被分为必要的层和改进的层。

公开(公告)号：KR1020120032408A

公开(公告)日：2012-04-05

申请号：KR1020110082983

申请日：2011-08-19

Applicant: 한국전자통신연구원

Inventor： 임종수 ,  권선형

IPC: H04L27/26

CPC classification number: H04L27/2614 ,  H04L27/2628 ,  H04L27/265

Abstract: PURPOSE: An apparatus and a method for transmitting and receiving data are provided to maintain the same BER(Bit Error Rate) performance as that of an existing OFDM(Orthogonal Frequency-Division Multiplexing) system by using modified Walsh-Hadamard transformation. CONSTITUTION: A first symbol mapping unit(120) generates a plurality of key symbols by mapping information about an optimal key index by symbol which indicates modified Walsh-Hadamard transformation causing a minimum PAPR(Peak-to-Average Power Ratio). A firstly modified Walsh-Hadamard converter(125) generates a plurality of modified Walsh-Hadamard transformed data symbols by transforming a plurality of data symbols with modified Walsh-Hadamards transformation according to modified Walsh-Hadamard matrixes. An IFFT(Inverse Fast Fourier Transformer)(130) generates a plurality of Fourier-inverted symbols by Fourier-transforming inversely a plurality of key symbols and a plurality of modified Walsh-Hadamards transformed data symbols. A transmitting unit(170) transmits the plurality of Fourier inverted symbols to a channel through one or more antennas.

Abstract translation: 目的：提供用于发送和接收数据的装置和方法，以通过使用修改的沃尔什 - 哈达玛变换来维持与现有OFDM（正交频分复用）系统相同的BER（误码率）性能。 构成：第一符号映射单元（120）通过映射关于最佳密钥索引的信息生成多个密钥符号，该符号指示修改的沃尔什 - 哈达玛变换，导致最小PAPR（峰均功率比）。 第一修改的沃尔什 - 哈达玛变换器（125）通过根据修改的沃尔什 - 哈达玛（Walsh-Hadamard）矩阵通过修改的沃尔什 - 哈达马斯变换来变换多个数据符号来生成多个经修改的沃尔什 - 哈达玛变换数据符号。 IFFT（快速傅里叶逆变换器）（130）通过对多个密钥符号和多个修改的沃尔什 - 哈达玛变换数据符号进行反向傅里叶变换来生成多个付里叶逆变符号。 发送单元（170）通过一个或多个天线将多个付里叶逆转符号发送到信道。