公开(公告)号：KR101853698B1

公开(公告)日：2018-05-02

申请号：KR1020160169931

申请日：2016-12-13

Applicant: 서울대학교산학협력단

Inventor： 전화숙 ,  서승범

IPC: H04W74/00 ,  H04W74/08

CPC classification number: H04W74/002 ,  H04W74/0833

Abstract: 단말기(UE)가서로다른두 개의프리앰블(preamble)을동시에기지국(eNB)으로전송하여논리적으로가능한프리앰블의수를늘리고, 이를통해단말기간의충돌확률과접속지연을줄일수 있도록한 재난상황에서액세스혼잡을줄이기위한듀얼프리앰블랜덤액세스방법에관한것으로서, 단말기에서유효한프리앰블쌍을구성하여기지국에전송하는단계, 기지국에서접속에성공한단말기수와불필요한응답메시지수를고려하여최적의 ACB 파라미터를산출하는단계, 기지국에서산출한최적의 ACB 파라미터를포함한응답메시지를생성하여단말기로방송하는단계, 응답메시지를수신한단말기에서응답메시지에포함된자원할당정보를이용해연결을요청하는단계및 기지국에서단말기로부터전송된연결요청메시지를수신하면연결완료메시지를상기단말기로전송하는단계를포함하여, 재난상황에서액세스혼잡을줄이기위한듀얼프리앰블랜덤액세스방법을구현한다.

公开(公告)号：KR101214389B1

公开(公告)日：2012-12-31

申请号：KR1020110143167

申请日：2011-12-27

Applicant: 서울대학교산학협력단

Inventor： 김영오 ,  서승범

IPC: G06F19/00 ,  G06F17/10

CPC classification number: Y02A90/16 ,  G06Q50/26 ,  G06F17/18

Abstract: PURPOSE: A future water shortage prediction method using a weighted value calculation method is provided to promote the stability of water supply by reflecting a climatic change effect to a water resource supply program. CONSTITUTION: A CPU(center processing unit) stores past flux values in a main memory of a computer and selects a flux value which is close to a GCM(global circulation model) future flux prediction value. The CPU calculates a weighted value for past annual water shortage amount connected to the selected past flux value by using a program. The CPU calculates the weighted value in a future water shortage amount prediction section by repeating calculation levels. The CPU calculates water shortage rates through a weighted average value and provides the weighted value to the past flux value by using a mathematical equation through the program. [Reference numerals] (AA) Past measured precipitation; (BB) CCMs simulated precipitation (past & future); (CC) Tank model; (DD) Tank model; (EE) Past flux scenario; (FF) Future flux scenario; (GG) K-WEAP model; (HH) Calculating a weighted value in a past scenario(year); (II) Water shortage amount in a past scenario(year); (JJ) Predicting water shortage amount in a future target year

Abstract translation: 目的：提供一种使用加权值计算方法的未来缺水预测方法，通过反映水资源供应计划的气候变化效应来提高供水的稳定性。 构成：CPU（中央处理单元）将过去的通量值存储在计算机的主存储器中，并选择接近GCM（全球循环模型）未来通量预测值的通量值。 CPU使用程序计算与选择的过去通量值相关的过去年度缺水量的加权值。 CPU通过重复计算水平来计算未来缺水量预测部中的加权值。 CPU通过加权平均值计算缺水率，并通过程序使用数学方程式将加权值提供给过去通量值。 （标号）（AA）过去测得的沉淀; （BB）CCMs模拟降水（过去和未来）; （CC）坦克模型; （DD）坦克模型; （EE）过去通量情景; （FF）未来通量情景; （GG）K-WEAP模型; （HH）计算过去情景（年）中的加权值; （二）过去情况下的缺水量（年）; （JJ）预测未来目标年度的缺水量