公开(公告)号：KR100814916B1

公开(公告)日：2008-03-19

申请号：KR1020060112276

申请日：2006-11-14

Applicant: 한국전자통신연구원

Inventor： 김재평 ,  김도형 ,  김원태 ,  이환구 ,  김선자

IPC: H04B7/26

CPC classification number: H04W36/14 ,  H04W52/223

Abstract: A method and an apparatus for controlling handoff through mobility prediction of a mobile terminal are provided to measure change of signal strength to predict previously that the mobile terminal is deviated from a current service zone, thereby performing fast handover processes and preventing frequent handover performance at an inter-network boundary zone. A method for controlling handoff through mobility prediction of a mobile terminal comprises the following steps of: periodically measuring signal strength of the mobile terminal at a current network and a neighboring network, and storing the measured value in a queue before updating the queue so as to maintain at least two latest measured values(S10,S12); periodically calculating an inclination of each signal strength of the current network and the neighboring network by using the signal strength measured values of the current network and the neighboring network stored in the queue, and predicting whether handover is necessary(S14,S16); and if so, instructing a handover command(S18).

Abstract translation: 提供了一种通过移动终端的移动性预测来控制切换的方法和装置，用于测量信号强度的变化，以预先预测移动终端从当前服务区域偏离，从而执行快速切换过程并防止频繁的切换性能 网间边界区。 一种用于通过移动终端的移动性预测控制切换的方法包括以下步骤：周期性地测量当前网络和相邻网络上的移动终端的信号强度，并且在更新队列之前将测量值存储在队列中，以便 保持至少两个最新测量值（S10，S12）; 通过使用存储在队列中的当前网络和相邻网络的信号强度测量值周期性地计算当前网络和相邻网络的每个信号强度的倾斜度，并且预测是否需要切换（S14，S16）; 如果是，则指示切换命令（S18）。

公开(公告)号：KR100772515B1

公开(公告)日：2007-11-01

申请号：KR1020060047540

申请日：2006-05-26

Applicant: 한국전자통신연구원

Inventor： 김도형 ,  마진석 ,  김재평 ,  김원태 ,  탁병철 ,  이환구 ,  김선자

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/28 ,  H04L1/00

Abstract: 본 발명은 무선랜 환경을 이용하여 와이브로 망 환경을 구축하는 방법에 관한 것으로, 보다 상세하게는 두 망간의 전환 기능을 테스트할 수 있도록 무선랜 환경을 와이브로 망 환경에 유사하게 구축하는 방법에 관한 것이다.
본 발명은 (a)상용 무선랜 환경에서의 패킷의 송수신 대역폭을 실제의 와이브로 망 환경에서의 대역폭으로 변경하여 초기화시키는 단계; (b)상기 패킷에 임의적으로 에러를 발생시켜 수신측에 전달하는 단계; 및 (c)상기 수신측에서 상기 에러가 검출되는 경우에는 상기 무선랜 환경의 액세스 포인트(AP)의 신호세기를 상기 와이브로 망 환경에서의 신호세기 값으로 조정하는 단계를 포함하여, 본 발명의 목적 및 기술적 과제를 달성한다.

公开(公告)号：KR100737360B1

公开(公告)日：2007-07-09

申请号：KR1020060102408

申请日：2006-10-20

Applicant: 한국전자통신연구원

Inventor： 김원태 ,  김흥남 ,  김선자 ,  김도형 ,  김재평 ,  이환구

IPC: H04L12/28

Abstract: A root mobile router in a dynamic mobile network and its operation method are provided to utilize a mobile terminal as a mobile router in a situation that a mobile object does not have a function as a mobile router. A network selecting module(411) selects a connection network suitable for a mobile network or determines whether a previously selected connection network has been changed or not. A handover processing module(412) maintains connectivity between each mobile node connected with a mobile router of the mobile network and the Internet through the connection network. A routing protocol module(416) transfers an IP packet generated from the mobile node to the Internet through the connection network. A root mobile router selecting module(415) selects one of a plurality of mobile routers and sets it as a root mobile router. When a central control module(414) receives selected connection network information from the network selecting module(411), it calls the routing protocol module(415) to change the connection network, and when the central control module(414) receives information on a failure of the mobile network, it calls the root mobile router selecting module(415) to change the root mobile router.

Abstract translation: 提供了一种动态移动网络中的根移动路由器及其操作方法，用于在移动对象不具备移动路由器功能的情况下，将移动终端作为移动路由器。 网络选择模块（411）选择适用于移动网络的连接网络或者确定先前选择的连接网络是否已经改变。 切换处理模块（412）通过连接网络维持与移动网络的移动路由器连接的每个移动节点与因特网之间的连接。 路由协议模块（416）通过连接网络将从移动节点产生的IP分组传送到因特网。 根移动路由器选择模块（415）选择多个移动路由器中的一个并将其设置为根移动路由器。 当中央控制模块（414）从网络选择模块（411）接收到选择的连接网络信息时，它呼叫路由协议模块（415）改变连接网络，并且当中央控制模块（414） 移动网络故障时，它调用根移动路由器选择模块（415）来改变根移动路由器。

公开(公告)号：KR1020070057614A

公开(公告)日：2007-06-07

申请号：KR1020060047540

申请日：2006-05-26

Applicant: 한국전자통신연구원

Inventor： 김도형 ,  마진석 ,  김재평 ,  김원태 ,  탁병철 ,  이환구 ,  김선자

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/28 ,  H04L1/00

Abstract: A method for constructing a WiBro(Wireless Broadband) network environment by using a wireless LAN(Local Area Network) environment is provided to be capable of constructing a similar wireless communication environment to a WiBro network by using a wireless LAN, thereby testing a network conversion function between the WiBro network and a CDMA(Code Division Multiple Access) network as well as a WiBro wireless communication function. The bandwidth for transceiving packets in a common wireless LAN environment is changed into a bandwidth of a substantial WiBro network environment, and is initialized(S41-S43). An error is randomly generated from the packets to deliver the error to a receiving side(S44). If the error is detected in the receiving side, signal strength of an AP(Access Point) of the wireless LAN environment is controlled so as to become a signal strength value of the WiBro network environment, thus the wireless LAN environment is approximated to the WiBro network environment(S45,S46).

Abstract translation: 提供了一种通过使用无线LAN（局域网）环境来构造WiBro（无线宽带）网络环境的方法，以便能够通过使用无线LAN向WiBro网络构建类似的无线通信环境，从而测试网络转换 WiBro网络和CDMA（码分多址）网络之间的功能以及WiBro无线通信功能。 用于在公共无线局域网环境中收发数据包的带宽变为实际WiBro网络环境的带宽，并被初始化（S41-S43）。 从数据包中随机生成错误，将错误传递给接收方（S44）。 如果在接收侧检测到错误，则控制无线LAN环境的AP（接入点）的信号强度，成为WiBro网络环境的信号强度值，因此无线LAN环境近似于WiBro 网络环境（S45，S46）。