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公开(公告)号：KR1020090030685A
公开(公告)日：2009-03-25
申请号：KR1020070096143
申请日：2007-09-20
Applicant: 한국전자통신연구원
IPC: H04L12/28
Abstract: A system for determining a reliable transmission path on a wireless network and a method thereof are provided to enable a wireless communication device to select the reliable path among the searched multiple paths and then determine the selected path as a transmission path. A system for determining a transmission path comprises a transmission quality calculating unit(110), ta transmission path selecting unit(120), a communication unit(130) and a data processing unit(140). The transmission quality calculating unit calculates the transmission quality of each path by referring to quality-decision parameters of each node included in searched multiple path. The transmission path selecting unit selects a path having the best transmission quality from information about the transmission quality of each path.
Abstract translation: 提供了一种用于确定无线网络上的可靠传输路径的系统及其方法，以使得无线通信设备能够在所搜索的多个路径中选择可靠的路径，然后将所选择的路径确定为传输路径。 用于确定传输路径的系统包括传输质量计算单元，传输路径选择单元（120），通信单元（130）和数据处理单元（140）。 传输质量计算单元通过参考搜索到的多路径中包含的每个节点的质量决定参数来计算每个路径的传输质量。 传输路径选择单元从关于每个路径的传输质量的信息中选择具有最佳传输质量的路径。
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公开(公告)号：KR100769991B1
公开(公告)日：2007-10-25
申请号：KR1020060120835
申请日：2006-12-01
Applicant: 한국전자통신연구원
IPC: H04L12/28
Abstract: A method for predicting a channel environment in a WPAN(Wireless Personal Area Network) and reserving transmission time is provided to guarantee stable multimedia transmission by increasing the reliability of data transmission through accurately predicting a channel environment. Starting a data transaction with a receiving station, a transmitting station measures a transmission distance from the receiving station(S402). The transmitting station confirms a data rate corresponding to the measured transmission distance from a predefined table(S403). Then the transmitting station measures the ARSS(Average Received Signal Strength) to determine the final data rate(S404) and compares the ARSS with a URSS(Upper bound RSS) and an LRSS(Lower bound RSS)(S405). If the ARSS is larger than or equal to the URSS, the transmitting station determines the confirmed data rate, obtained from the table, as the final data rate(S406). In case the ARSS is smaller than the URSS and larger than the LRSS, the transmitting station determines a data rate lower than the confirmed data rate as the final data rate(S407). If the ARSS is smaller than or equal to the LRSS, the transmitting station determines the lowest data rate of the table as the final data rate(S408). The transmitting station stores the determined data rate in a DRP(Distributed Reservation Protocol) IE(Information Element) and executes the next DRP reservation according to the determined data rate(S409).
Abstract translation: 提供了一种用于预测WPAN（无线个人区域网络）中的信道环境并保留传输时间的方法，以通过准确预测信道环境增加数据传输的可靠性来保证稳定的多媒体传输。 开始与接收站的数据交易，发送站测量与接收站的传输距离（S402）。 发送站从预定义表确认与测量的传输距离对应的数据速率（S403）。 然后发送站测量ARSS（平均接收信号强度）以确定最终数据速率（S404），并将ARSS与URSS（上限RSS）和LRSS（下限RSS）进行比较（S405）。 如果ARSS大于或等于URSS，则发送站将从表中获得的确认数据速率确定为最终数据速率（S406）。 在ARSS小于URSS并且大于LRSS的情况下，发送站确定比确认的数据速率低的数据速率作为最终数据速率（S407）。 如果ARSS小于或等于LRSS，则发送站将该表的最低数据速率确定为最终数据速率（S408）。 发送站将确定的数据速率存储在DRP（分布式预留协议）IE（信息元素）中，并根据确定的数据速率执行下一个DRP预留（S409）。
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公开(公告)号：KR100748086B1
公开(公告)日：2007-08-09
申请号：KR1020050107553
申请日：2005-11-10
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0002 , H04L1/0007 , H04L1/0015 , H04L1/1692 , Y02D50/10
Abstract: 본 발명은 과거의 전송 실패 데이터의 수와 과거 수신 강도를 조합하여 무선 통신 채널의 품질을 더욱 정확하게 예측하고 그 결과 채널 품질을 조절함으로써 데이터 전송의 신뢰도를 높일 수 있는 무선 통신 채널 품질 유지 방법 및 이를 이용한 무선 통신 장치를 제공하기 위한 것으로서, 본 발명은 송신 데이터에 대한 전송 성공 여부와, 무선 통신 채널의 수신 강도 (RSS: Receive Strength Signal)를 함께 수집한 후, 설정된 관찰 구간 동안의 전송 실패한 프레임의 수와, 수신 강도 평균값을 각각 기설정된 값과 비교하고, 그 비교 결과의 논리 조합에 의해 무선 통신 채널의 품질 및 품질 저하 원인을 구체적으로 예측함으로써, 채널 품질의 안정적인 조절을 가능하게 한 것이다.
무선 통신 장치, 전송 노드, 수신 노드, 응답 프레임, 채널, 간섭, 수신 강도(RSS)-
公开(公告)号：KR1020070050232A
公开(公告)日：2007-05-15
申请号：KR1020050107553
申请日：2005-11-10
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0002 , H04L1/0007 , H04L1/0015 , H04L1/1692 , Y02D50/10 , H04L1/0026
Abstract: Disclosed herein are a method for balancing the quality of a wireless communication channel wherein the quality of the wireless communication channel can be more accurately estimated and adjusted on the basis of the combination of observation results of the number of data frames failed to be transmitted in the past and a received signal strength (RSS), and reliability of data transmission over the channel can thus be increased, and a wireless communication apparatus using the same. The method includes collecting information about whether data frames have been successfully transmitted and information about RSSs of the wireless communication channel, acquiring the number of data frames failed to be transmitted and an average RSS in a predetermined observation period using the collected information, comparing the acquired transmission-failed data frame number with a predetermined threshold value and the acquired average RSS with a predetermined reference RSS, respectively, and estimating the quality of the wireless communication channel and quality degradation factors in detail by performing an AND operation with respect to the comparison results. Therefore, it is possible to stably adjust the channel quality.
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