公开(公告)号：KR1020070048584A

公开(公告)日：2007-05-09

申请号：KR1020060055055

申请日：2006-06-19

Applicant: 삼성전자주식회사 ,  재단법인서울대학교산학협력재단

Inventor： 김영수 ,  최성현 ,  장경훈 ,  진성근 ,  황효선 ,  한광훈

IPC: H04L12/28 ,  H04L29/06 ,  H04W16/00 ,  H04B7/26

CPC classification number: H04L12/12 ,  H04W4/06 ,  H04W36/00 ,  H04W52/0216 ,  H04W52/287 ,  H04W68/00 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/142 ,  Y02D70/23 ,  Y02D70/00

Abstract: The present invention relates to a power saving in a wireless local area network including a plurality of access points providing at least one mobile station in each access point cell boundary with access service, the mobile station transits between an active mode and an idle mode. The power saving method includes grouping the access points into at least one paging group with a paging group boundary; determining if the a mobile station is in the idle mode in which the mobile station switches between an awake state and a doze state every predetermined time interval, or the active mode in which the mobile station is in the awake mode; and if the mobile station is in the idle mode enabling an idle handoff which occurs only when the mobile station crosses the paging group boundary. In the present invention, the handoff occurs when the mobile terminal crosses the paging group boundary but not the access point cell in the idle mode, resulting in reduction of power consumption.

公开(公告)号：KR100678223B1

公开(公告)日：2007-02-01

申请号：KR1020030015735

申请日：2003-03-13

Applicant: 재단법인서울대학교산학협력재단 ,  삼성전자주식회사

Inventor： 황효선 ,  장경훈 ,  최성현 ,  김영수

IPC: H04W28/18 ,  H04L12/891

CPC classification number: H04L47/10 ,  H04L47/14 ,  H04L47/15 ,  H04L47/24 ,  H04L47/36 ,  H04L47/41 ,  H04W28/22 ,  H04W28/24

Abstract: 통신시스템의 패킷 전송 방법 및 장치에 대해 개시한다.
본 발명에 따른 패킷 전송 방법은 상위 계층으로부터 서비스 품질에 대한 정보와 데이터율 정보를 제공받는 과정과, 하위 계층으로부터 무선단말들의 채널 상태 정보를 제공받는 과정과, 상기 제공받은 정보들에 따라 집합패킷을 생성하여 매체접근제어 계층으로 전송하는 과정을 포함한다.

Aggregation, 오버헤드, MAC

公开(公告)号：KR1020060013607A

公开(公告)日：2006-02-13

申请号：KR1020040062252

申请日：2004-08-07

Applicant: 삼성전자주식회사 ,  재단법인서울대학교산학협력재단

Inventor： 장경훈 ,  이동준 ,  최성현 ,  장진봉 ,  김영수

IPC: H04L12/891 ,  H04W28/06

CPC classification number: H04L69/04 ,  H04W28/06 ,  H04W28/065

Abstract: In the data transmission method, a MAC layer receives data from an upper layer, classifies the data according to destination addresses and traffic identifiers, aggregates the data by destination address and traffic identifier as a first transmission unit, aggregates the first transmission units having the identical destination address as a second transmission unit, and transmits the second transmission units having different destination addresses in a single frame. The data transmission method allows packets transferred from the upper layer to be hierarchically aggregated by DAs and TIDs and then packaged into a data unit for each destination such that it is possible to transmit the data at an optimal data rate for each destination terminal.

Abstract translation: 在数据传输方法中，MAC层接收来自上层的数据，根据目的地地址和业务标识符对数据进行分类，按照目的地地址和业务标识符将数据聚合为第一传输单元，聚集具有相同的第一传输单元 目的地址作为第二传输单元，并且在单个帧中传输具有不同目的地址的第二传输单元。 数据传输方法允许从上层传输的分组由DA和TID分层聚合，然后打包成每个目的地的数据单元，使得可以以每个目的地终端的最优数据速率传输数据。

公开(公告)号：KR100506253B1

公开(公告)日：2005-08-10

申请号：KR1020030033460

申请日：2003-05-26

Applicant: 재단법인서울대학교산학협력재단 ,  삼성전자주식회사

Inventor： 황효선 ,  최성현 ,  장경훈 ,  김영수

IPC: H04L12/861

CPC classification number: H04L69/04 ,  H04L49/90 ,  H04L49/9094

Abstract: Disclosed is a method for preventing transmission delay occurring when transmitting packet data to a destination in a transmission module including a first memory having a first memory area for storing packet data to be transmitted and a second memory area for backing up the first memory area, a second memory connected to a transmission link, and a frame processor. The method comprises storing a copy of the packet data stored in the second memory area according to a state of the second memory; deleting the packet data stored in the second memory area if copy of the packet data stored in the second memory is transmitted; determining whether packet data combining is possible according to a state of the second memory area; and if the packet data combining is possible, combining the packet data stored in the first memory area with the packet data stored in the second memory area and storing the combined packet data in the second memory.

公开(公告)号：KR1020050065790A

公开(公告)日：2005-06-30

申请号：KR1020030096679

申请日：2003-12-24

Applicant: 삼성전자주식회사 ,  재단법인서울대학교산학협력재단

Inventor： 김영수 ,  오왕록 ,  전경훈

IPC: H03M13/27

CPC classification number: H03M13/635 ,  H03M13/1194 ,  H03M13/29

Abstract: 본 발명은 반복 누적 기법과 천공 기법을 이용한 부호화 기술에 관한 것으로,부호기에 입력된 정보 비트들은 미리 정해진 반복 회수 만큼 반복되어 반복 비트 열을 형성하고, 상기 반복 비트 열은 인터리버에 의해 인터리빙 된 후 누적기에 의해 누적과정을 거쳐 일정한 길이의 누적 비트 열로 출력되고, 상기 누적기의 누적 비트 열은 상기 정보 비트들과 병렬/직렬 변환기를 통해 직렬 비트 열로 변환된 후 천공기에 의해 미리 정해진 천공 패턴에 따라 천공되어 요구되는 부호율의 코드워드가 생성된다.

公开(公告)号：KR1020040101746A

公开(公告)日：2004-12-03

申请号：KR1020030033460

申请日：2003-05-26

Applicant: 재단법인서울대학교산학협력재단 ,  삼성전자주식회사

Inventor： 황효선 ,  최성현 ,  장경훈 ,  김영수

IPC: H04L12/861

CPC classification number: H04L69/04 ,  H04L49/90 ,  H04L49/9094

Abstract: PURPOSE: An apparatus and method for minimizing transmission delay in a data communication system is provided to prevent the transmission delay of packet data by temporarily storing the packet data to be transmitted to a transmitting buffer in a backup queue, directly transmitting the packet data when the transmitting buffer is in an idle state, and aggregating and transmitting newly received packet data and the previously received packet data in case that the transmitting buffer is in a busy state. CONSTITUTION: A transmission module for aggregation consists of a transmission management part(110) and a transmission protocol engine part(120). The transmission management part(110) covers the management of transmission data and preprocessing for a protocol header. The transmission protocol engine part(120) transmits actual packet data according to a transmission protocol. The transmission management part(110) is composed of a transmitting queue(111) and a frame processor(113). The transmitting queue(111) stores data for data management. The frame processor(113) aggregates the packet data stored in the transmitting queue(111). In addition, the transmission management part(110) comprises a backup queue(112) that temporarily stores the packet data to be transmitted to the transmission protocol engine part(120).

Abstract translation: 目的：提供一种用于最小化数据通信系统中的传输延迟的装置和方法，用于通过临时存储要发送到备份队列中的发送缓冲器的分组数据来防止分组数据的传输延迟，直接在备份队列中发送分组数据 发送缓冲器处于空闲状态，并且在发送缓冲器处于忙状态的情况下聚合和发送新接收的分组数据和先前接收的分组数据。 构成：用于聚合的传输模块由传输管理部分（110）和传输协议引擎部分（120）组成。 发送管理部（110）覆盖发送数据的管理和协议头的预处理。 传输协议引擎部分（120）根据传输协议发送实际的分组数据。 发送管理部（110）由发送队列（111）和帧处理部（113）构成。 发送队列（111）存储用于数据管理的数据。 帧处理器（113）聚合存储在发送队列（111）中的分组数据。 另外，发送管理部（110）具有临时存储要发送到发送协议引擎部（120）的分组数据的备用队列（112）。