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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
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.
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公开(公告)号：KR101009804B1
公开(公告)日：2011-01-19
申请号：KR1020060055055
申请日：2006-06-19
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
CPC classification number: H04L12/12 , H04W4/06 , H04W36/00 , H04W52/0216 , H04W52/287 , H04W68/00 , H04W84/12 , H04W88/08 , Y02D70/142 , Y02D70/23
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.
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3.发明授权무선 통신 시스템에서 이동국의 핸드오프 시 수행되는억세스 포인트 스캐닝 방법 및 상기 방법을 수행하는이동국과, 상기 방법을 지원하는 네트워크 인터페이스 및상기 방법이 채용된 무선 통신 시스템 有权在无线通信系统中的站移动程序中扫描接入点的方法和执行方法的站点和支持方法的网络接口和启用该方法的无线通信系统
公开(公告)号：KR100758354B1
公开(公告)日：2007-09-14
申请号：KR1020060084417
申请日：2006-09-01
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
CPC classification number: H04W48/16 , H04L29/12839 , H04L29/12952 , H04L61/6022 , H04L61/6077 , H04W8/26 , H04W36/0083 , H04W88/08
Abstract: A method for scanning access points during mobile station's handoff in a wireless communication system, a mobile station for performing the same, a network interface for supporting the same, and a wireless communication system applied with the same are provided to search an access point existing in an available channel during a scanning operation of the mobile station and obtain access point information of the searched access point, thereby minimizing scanning latency. A method for scanning access points comprises the following steps of: transmitting query data to one or more access points(201,202) with respect to a predetermined channel(351); receiving response data to the query data from the access point existing in the channel; request access point information to the access point which has transmitted the response data; and receiving the access point information from the access point(353).
Abstract translation: 提供了一种用于在无线通信系统中的移动站切换期间扫描接入点的方法，用于执行该接入点的方法，用于执行该接入点的方法，用于支持该接入点的网络接口和应用该接入点的无线通信系统，以搜索存在于 在移动站的扫描操作期间的可用信道，并获得所搜索的接入点的接入点信息，从而最小化扫描等待时间。 扫描接入点的方法包括以下步骤：将查询数据相对于预定信道（351）发送到一个或多个接入点（201,202）; 从所述通道中存在的接入点接收对所述查询数据的响应数据; 向接收点发送响应数据请求接入点信息; 以及从接入点（353）接收接入点信息。
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公开(公告)号：KR100703503B1
公开(公告)日：2007-04-03
申请号：KR1020040099562
申请日：2004-11-30
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
CPC classification number: H04L1/1877 , H04L1/188
Abstract: 본 발명은 통신 시스템에서, 송신기측의 물리(PHY: Physical) 계층이 송신기측의 매체 접속 제어(MAC: Medium Access Control) 계층으로부터 상기 수신기측으로 전송할 데이터를 전달받으면, 상기 데이터를 상기 수신기측의 PHY 계층으로 전송하고, 상기 데이터를 전송한 후 상기 수신기측의 PHY 계층으로부터 상기 데이터의 정상 수신 여부를 나타내는 정보를 수신한 후, 상기 데이터의 정상 수신 여부를 나타내는 정보가 정상 수신을 나타낼 경우 상기 데이터의 정상 수신을 상기 송신기측의 MAC 계층으로 통보하고, 상기 데이터의 정상 수신 여부를 나타내는 정보가 비정상 수신을 나타낼 경우 상기 데이터를 상기 수신기측의 PHY 계층으로 재전송한다.
FARQ 방식, HARQ 방식, ARQ 방식, MAC 계층, PHY 계층-
公开(公告)号：KR1020060060488A
公开(公告)日：2006-06-05
申请号：KR1020040099562
申请日：2004-11-30
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
CPC classification number: H04L1/1877 , H04L1/188
Abstract: 본 발명은 송신기측이 매체 접속 제어(MAC: Medium Access Control) 계층과 물리(PHY: Physical) 계층을 구비하며, 수신기측이 MAC 계층과 PHY 계층을 구비하는 이동 통신 시스템에서, 상기 송신기측의 PHY 계층이 상기 송신기측의 MAC 계층으로부터 상기 수신기측으로 전송할 데이터를 전달받으면, 상기 데이터를 상기 수신기측의 PHY 계층으로 전송하고, 상기 데이터를 전송한 후 상기 수신기측의 PHY 계층으로부터 상기 데이터의 정상 수신 여부를 나타내는 정보를 수신한 후, 상기 데이터의 정상 수신 여부를 나타내는 정보가 정상 수신을 나타낼 경우 상기 데이터의 정상 수신을 상기 송신기측의 MAC 계층으로 통보하고, 상기 데이터의 정상 수신 여부를 나태는 정보가 비정상 수신을 나타낼 경우 상기 데이터를 상기 수신기측의 PHY 계층으로 재전송한다.
FARQ 방식, HARQ 방식, ARQ 방식, MAC 계층, PHY 계층-
Patent Agency Ranking
公开(公告)号：KR101214618B1
公开(公告)日：2012-12-21
申请号：KR1020060113965
申请日：2006-11-17
Applicant: 주식회사 케이티 , 재단법인서울대학교산학협력재단
IPC: H04B7/26
CPC classification number: Y02D70/14
Abstract: 이를위하여, 본발명은, IEEE 802.11 기반무선랜액세스포인트에서의전력절약방법에있어서, 슈퍼프레임을리슨(LISTEN) 구간, 서비스(SERVICE) 구간, 슬립(SLEEP) 구간으로구분하는단계; 및상기리슨구간에서단말이보내는데이터를수신하고, 상기서비스구간에서단말로데이터를송신하며, 상기슬립구간에서라디오를끄고슬립상태에머무르는단계를포함하되, 상기슬립구간에서소정의존속시간(duration) 값을갖는 'CTS-TO-SELF' 프레임을단말로전송하여, 단말로하여금현재채널이사용되고있다고인식하도록한다.
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公开(公告)号：KR1020080045015A
公开(公告)日：2008-05-22
申请号：KR1020060113965
申请日：2006-11-17
Applicant: 주식회사 케이티 , 재단법인서울대학교산학협력재단
IPC: H04B7/26
CPC classification number: Y02D70/14 , H04W52/0206 , H04W84/12 , Y02D70/00
Abstract: A method for saving power in a WLAN access point based on IEEE 802.11 is provided to set a part for turning off a radio to a super frame, and prevent stations from transmitting data to an access point during the part by using a virtual carrier sensing scheme defined in IEEE 802.11 standards, thereby increasing a lifetime of a WLAN access point operating with limited battery power. A method for saving power in a WLAN(Wireless Local Area Network) access point based on IEEE(Institute of Electrical and Electronics Engineers) 802.11 comprises the following steps. A super frame is divided into a listen part(101), a service part(102) and a sleep part(103). In the listen part, data transmitted from a station(12) is received. In the service part, data is transmitted to the station. In the sleep part, a radio is turned off to stay in a sleep state. By transmitting a 'CTS-TO-SELF' frame having a predetermined duration value to the station in the sleep part, the station can recognize that a channel is currently used.
Abstract translation: 提供了一种基于IEEE 802.11节省WLAN接入点功率的方法，用于将无线电设备关闭到超帧，并通过使用虚拟载波侦听方案来防止电台在该部分期间向接入点发送数据 在IEEE 802.11标准中定义，从而增加了以有限的电池电力工作的WLAN接入点的寿命。 基于IEEE（电气和电子工程师协会）802.11的WLAN（无线局域网）接入点的节电方法包括以下步骤。 超帧被分为监听部分（101），服务部分（102）和睡眠部分（103）。 在监听部分，接收从站（12）发送的数据。 在服务部分，数据被传送到站。 在睡眠部分，收音机关闭以保持睡眠状态。 通过向睡眠部分中的站发送具有预定持续时间值的“CTS-TO-SELF”帧，站可以识别当前正在使用信道。
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公开(公告)号：KR1020100002044A
公开(公告)日：2010-01-06
申请号：KR1020080100230
申请日：2008-10-13
IPC: H04B7/26
CPC classification number: H04W36/0083 , H04J2211/001 , H04W84/045
Abstract: PURPOSE: A femto cell search method for macro to femto handover is provided to minimize the MAC(Media Access Control) overhead by excluding the neighbor femto cell list within the base station advertise message MOB NBR ADV(Mobile Neighbor Advertisement) message which the macro cell transmits. CONSTITUTION: A terminal broadcasts the respective dummy preamble to the exclusive symbol assigned in the first base station(S130). The terminal decides the dummy preamble coincides for the triggering condition(S150). The terminal creates the femto cell information request message in the first base station(S160). The first base station transmits the femto cell information response message in the terminal(S190). The femto cell information response message comprises the neighbor femto cell list about obtained femto cell IDs. The terminal looks for the candidate base station(S200).
Abstract translation: 目的：提供用于宏到毫微微切换的毫微微小区搜索方法，以通过排除基站通告消息MOB NBR ADV（移动邻居广播）消息中的相邻毫微微小区列表来最小化MAC（媒体接入控制）开销，宏消息 传输。 构成：终端将相应的伪前导码广播到在第一基站中分配的排他符号（S130）。 终端确定虚拟前导符合触发条件（S150）。 终端在第一基站中创建毫微微小区信息请求消息（S160）。 第一基站在终端中发送毫微微小区信息响应消息（S190）。 毫微微小区信息响应消息包括关于获得的毫微微小区ID的邻居毫微微小区列表。 终端查找候选基站（S200）。
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公开(公告)号：KR1020100048881A
公开(公告)日：2010-05-11
申请号：KR1020090096762
申请日：2009-10-12
Abstract: PURPOSE: A terminal, a method for handover thereof, and a supporting method for the handover of a base station are provided to efficiently generate and manage a neighboring base station list including femto cell information in order for a terminal to perform a handover process in a condition in which a plurality of femto cells and macro cells are superimposed. CONSTITUTION: A macro base station(100) manages a macro cell(10). The macro cell includes a plurality of femto cells(21,22,23) managed by the plurality of femto base stations(210,220,230). The macro cell represents a cell that is larger than the femto cell. The femto base stations represent very small base stations for providing a wireless communication service to small areas and manage the femto cell. For example, they are installed in a blanket area where propagation of other cells is degraded such as a house or a building to acquire a high quality mobile communication service. A terminal(300) represents the end terminal of a radio channel and accesses the femto base stations or the macro base station to transmit/receive data. The terminal performs a scan process based on the neighboring base station list broadcast by the macro base station. The terminal acquires measurement information on the neighboring macro base stations through the scan process. The measurement information includes information that can influence the handover such as RSSSI(Received Signal Strength Indicator), CNR(Carrier to Noise Ratio), and SINR(Signal to Interference Noise Ratio).
Abstract translation: 目的：提供一种终端，其切换方法以及用于基站切换的支持方法，以有效地生成和管理包括毫微微小区信息在内的相邻基站列表，以便终端执行切换过程 叠加多个毫微微小区和宏小区的条件。 构成：宏基站（100）管理宏小区（10）。 宏小区包括由多个毫微微基站（210,220,230）管理的多个毫微微小区（21,22,23）。 宏小区表示大于毫微微小区的小区。 毫微微基站代表非常小的基站，用于向小区域提供无线通信服务并管理毫微微小区。 例如，它们被安装在诸如房屋或建筑物之类的其它小区的传播的覆盖区域中，以获得高质量的移动通信服务。 终端（300）表示无线电信道的终端，并且访问毫微微基站或宏基站来发送/接收数据。 终端基于由宏基站广播的相邻基站列表执行扫描处理。 终端通过扫描处理获取相邻宏基站的测量信息。 测量信息包括可以影响诸如RSSSI（接收信号强度指示符），CNR（载噪比）和SINR（信号与干扰噪声比）的切换的信息。
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公开(公告)号：KR1020100006119A
公开(公告)日：2010-01-18
申请号：KR1020090060364
申请日：2009-07-02
Abstract: PURPOSE: An identification method and a device for generating a protocol data unit are provided to reduce a size of a PDU(Protocol Data Unit) header by including a flow identifier in a PDU header. CONSTITUTION: A media access control layer of a base station(10) allocates a station identifier for distinguishing a terminal in a cell(20) to the terminal(S110). The station identifier is allocated to the terminal when the terminal enters or reenters the network. The media access control layer allocates the flow identifier for distinguishing the connection in the terminal to the corresponding connection in the terminal(S120). The media access control layer of the base station transmits the flow identifier allocated to the corresponding connection to a header of the PDU(S130). The media access control layer divides the media access control identifier into the station identifier and the flow identifier. Each connection is distinguished by the combination of the station identifier and the flow identifier.
Abstract translation: 目的：提供用于生成协议数据单元的识别方法和设备，以通过在PDU报头中包括流标识符来减小PDU（协议数据单元）报头的大小。 构成：基站（10）的媒体接入控制层分配用于将小区（20）中的终端区分为终端的站标识符（S110）。 当终端进入或重新进入网络时，站标识符被分配给终端。 媒体接入控制层分配用于区分终端中的连接的流标识符与终端中的对应连接（S120）。 基站的媒体接入控制层将分配给对应连接的流标识符发送到PDU的报头（S130）。 媒体访问控制层将媒体访问控制标识符分成站标识符和流标识符。 每个连接通过站标识符和流标识符的组合来区分。
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