公开(公告)号：KR1020090065328A

公开(公告)日：2009-06-22

申请号：KR1020070132823

申请日：2007-12-17

Applicant: 한국전자통신연구원 ,  한국과학기술원

Inventor： 배정숙 ,  신경철 ,  김태훈 ,  최용훈 ,  김수정 ,  한영남

IPC: H04B7/26

CPC classification number: H04W36/30 ,  H04W36/14 ,  H04W48/18 ,  H04W88/06

Abstract: A handover method in a mobile communication network and an apparatus thereof are provided to effectively select a network suitable for a user's environment, thereby maximizing quality of wireless services having costs and performance suitable for a request of the user. A utility function according to a user environment of a candidate network and user satisfaction about each of candidate networks is obtained(210). Each service providing time of the candidate networks is obtained(220). A selection function about each of the candidate networks is obtained(230). A handover target network is selected among the candidate networks(240).

Abstract translation: 提供移动通信网络中的切换方法及其装置，以有效地选择适合于用户环境的网络，从而使具有适合用户请求的成本和性能的无线服务的质量最大化。 获得根据候选网络的用户环境的效用函数和关于每个候选网络的用户满意度（210）。 获得候选网络的每个服务提供时间（220）。 获得关于每个候选网络的选择功能（230）。 在候选网络（240）中选择切换目标网络。

公开(公告)号：KR101428919B1

公开(公告)日：2014-08-11

申请号：KR1020130038482

申请日：2013-04-09

Applicant: 한국과학기술원

Inventor： 최용훈 ,  한영남 ,  송유재

IPC: H04W72/04

CPC classification number: H04W72/0413 ,  H04W72/085

Abstract: The embodiment of the present invention relates to an efficient uplink multiple access method and an apparatus in a multiple radio access system. The uplink multiple access method in the multiple radio access system includes the steps of: measuring the channel states of the component carriers; determining the transmission power and assigned frequency of the component carrier to transmit data among the component carriers through Lagrangian and Newton methods; deriving an optimum solution through the Lagrangian and Newton methods; and connecting a preset number of component carriers to simultaneously access the uplink.

Abstract translation: 本发明的实施例涉及一种有效的上行链路多址接入方法和多无线电接入系统中的装置。 多无线电接入系统中的上行多址接入方法包括以下步骤：测量分量载波的信道状态; 确定分量载波的传输功率和分配频率通过拉格朗日和牛顿方法在分量载波之间传输数据; 通过拉格朗日和牛顿法得出最优解; 并连接预设数量的分量载波以同时接入上行链路。

公开(公告)号：KR1020100020904A

公开(公告)日：2010-02-23

申请号：KR1020090070893

申请日：2009-07-31

Applicant: 한국과학기술원

Inventor： 김태훈 ,  한영남 ,  최용훈 ,  이덕훈 ,  한덕희

IPC: H04W36/14 ,  H04W48/18

CPC classification number: H04W36/245 ,  H04W36/04

Abstract: PURPOSE: A handover apparatus and a method on history information, program recorded computer-readable storage medium are provided to select a handover target network based on a history utility functions thereby reducing an unnecessary handover. CONSTITUTION: A connection time calculation part(110) calculates the last connection time of a present network. A history utility function calculation unit(120) calculates a history utility function value according to the last connection time. A system utility function calculation unit(130) calculates a system utility function value according to a network environment between candidate networks. A selection function calculation unit(140) calculates a selected function value about the candidate networks using the history and the system utility function value, and the last connection time. The second selecting unit(150) selects one candidate network as a handover target network by comparing the selected function value.

Abstract translation: 目的：提供切换装置和历史信息方法，程序记录的计算机可读存储介质，以便根据历史效用函数选择切换目标网络，从而减少不必要的切换。 构成：连接时间计算部（110）计算当前网络的最后连接时间。 历史效用函数计算单元（120）根据最后的连接时间计算历史效用函数值。 系统效用函数计算单元（130）根据候选网络之间的网络环境来计算系统效用函数值。 选择函数计算单元（140）使用历史和系统效用函数值以及最后的连接时间来计算关于候选网络的所选函数值。 第二选择单元（150）通过比较所选择的功能值来选择一个候选网络作为切换目标网络。