• Title, Summary, Keyword: telecommunications network

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An Algorithm for Performance Index of Telecommunications Network

  • Shin, YongYeon;Lee, SoYeon;Koh, JaiSang
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • v.2 no.2
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    • pp.111-123
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    • 1998
  • Performance index is a measure of telecommunications network integrating reliability and capacity simultaneously. This paper suggests a computerized algorithm evaluating a performance index for telecommunications network and compares this computerized algorithm with the algorithm[1] by experimenting on several benchmarks. A computerized algorithm proposed by this paper is superior to the algorithm[1] with respect to the computation time for most of the benchmarks.

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Ultra-low-latency services in 5G systems: A perspective from 3GPP standards

  • Jun, Sunmi;Kang, Yoohwa;Kim, Jaeho;Kim, Changki
    • ETRI Journal
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    • v.42 no.5
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    • pp.721-733
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    • 2020
  • Recently, there is an increasing demand for ultra-low-latency (ULL) services such as factory automation, autonomous driving, and telesurgery that must meet an end-to-end latency of less than 10 ms. Fifth-generation (5G) New Radio guarantees 0.5 ms one-way latency, so the feasibility of ULL services is higher than in previous mobile communications. However, this feasibility ensures performance at the radio access network level and requires an innovative 5G network architecture for end-to-end ULL across the entire 5G system. Hence, we survey in detailed two the 3rd Generation Partnership Party (3GPP) standardization activities to ensure low latency at network level. 3GPP standardizes mobile edge computing (MEC), a low-latency solution at the edge network, in Release 15/16 and is standardizing time-sensitive communication in Release 16/17 for interworking 5G systems and IEEE 802.1 time-sensitive networking (TSN), a next-generation industry technology for ensuring low/deterministic latency. We developed a 5G system based on 3GPP Release 15 to support MEC with a potential sub-10 ms end-to-end latency in the edge network. In the near future, to provide ULL services in the external network of a 5G system, we suggest a 5G-IEEE TSN interworking system based on 3GPP Release 16/17 that meets an end-to-end latency of 2 ms.

Interworking technology of neural network and data among deep learning frameworks

  • Park, Jaebok;Yoo, Seungmok;Yoon, Seokjin;Lee, Kyunghee;Cho, Changsik
    • ETRI Journal
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    • v.41 no.6
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    • pp.760-770
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    • 2019
  • Based on the growing demand for neural network technologies, various neural network inference engines are being developed. However, each inference engine has its own neural network storage format. There is a growing demand for standardization to solve this problem. This study presents interworking techniques for ensuring the compatibility of neural networks and data among the various deep learning frameworks. The proposed technique standardizes the graphic expression grammar and learning data storage format using the Neural Network Exchange Format (NNEF) of Khronos. The proposed converter includes a lexical, syntax, and parser. This NNEF parser converts neural network information into a parsing tree and quantizes data. To validate the proposed system, we verified that MNIST is immediately executed by importing AlexNet's neural network and learned data. Therefore, this study contributes an efficient design technique for a converter that can execute a neural network and learned data in various frameworks regardless of the storage format of each framework.

PMD compensator using DOP as Penalty signal (DOP를 이용한 1차 PMD 보상 장치)

  • Seo Jae-Eun;Kim Sang-In;Jeong Ki-Tae;Song Gil-Ho
    • 한국정보통신설비학회:학술대회논문집
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    • pp.140-141
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    • 2002
  • 본 논문에서는 degree of polarization (DOP)을 편광모드분산의 간접적인 측정수단으로 사용하는 1차 편광모드분산 보상 장치의 개발을 보고한다. 개발된 장치를 이용한 10Gb/s의 전송 속도에 대한 성공적인 편광모드분산 보상 실험 결과를 보고한다. 현재 개발된 장치의 응답속도는 약 1.5초이며 이는 DOP 측정 장비의 속도에 의해서 제약된다.

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Data Sorting-based Adaptive Spatial Compression in Wireless Sensor Networks

  • Chen, Siguang;Liu, Jincheng;Wang, Kun;Sun, Zhixin;Zhao, Xuejian
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.8
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    • pp.3641-3655
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    • 2016
  • Wireless sensor networks (WSNs) provide a promising approach to monitor the physical environments, to prolong the network lifetime by exploiting the mutual correlation among sensor readings has become a research focus. In this paper, we design a hierarchical network framework which guarantees layered-compression. Meanwhile, a data sorting-based adaptive spatial compression scheme (DS-ASCS) is proposed to explore the spatial correlation among signals. The proposed scheme reduces the amount of data transmissions and alleviates the network congestion. It also obtains high compression performance by sorting original sensor readings and selectively discarding the small coefficients in transformed matrix. Moreover, the compression ratio of this scheme varies according to the correlation among signals and the value of adaptive threshold, so the proposed scheme is adaptive to various deploying environments. Finally, the simulation results show that the energy of sorted data is more concentrated than the unsorted data, and the proposed scheme achieves higher reconstruction precision and compression ratio as compared with other spatial compression schemes.

Network Selection Algorithm Based on Spectral Bandwidth Mapping and an Economic Model in WLAN

Ambitious and Challenging Targets for New Generation Network

  • Tran, Minh Anh;Bui, Trung Hieu;Nguyen, Chien Trinh;Bui, Thi Minh Tu
    • IEIE Transactions on Smart Processing and Computing
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    • v.5 no.3
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    • pp.185-192
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    • 2016
  • Today, the Internet has penetrated almost all the ins and outs of social life, has changed work, communications, social influence and the lifestyle of humankind. However, it is still short of flexibility, transparency etc., due to network address translator overuse, masschanges, uncomfortable protocols, and so on. Hence, more research is necessary into future telecommunications networks based on contemporary networks accompanied by new requisitions and new designs that are compatible with today's and tomorrow's demands. This paper researches a new vision of the telecommunication network of the future, its effects on human life and society, and the targets to achieve a new generation network (NwGN). In the paper, we also propose orientation towards an NwGN from the current networks, especially with Vietnam's telecommunications networks.

Defense Strategy of Network Security based on Dynamic Classification

  • Wei, Jinxia;Zhang, Ru;Liu, Jianyi;Niu, Xinxin;Yang, Yixian
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.12
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    • pp.5116-5134
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    • 2015
  • In this paper, due to the network security defense is mainly static defense, a dynamic classification network security defense strategy model is proposed by analyzing the security situation of complex computer network. According to the network security impact parameters, eight security elements and classification standard are obtained. At the same time, the dynamic classification algorithm based on fuzzy theory is also presented. The experimental analysis results show that the proposed model and algorithm are feasible and effective. The model is a good way to solve a safety problem that the static defense cannot cope with tactics and lack of dynamic change.

Vertical Handoff Decision Algorithm combined Improved Entropy Weighting with GRA for Heterogeneous Wireless Networks

  • Zhao, Shasha;Wang, Fei;Ning, Yueqiang;Xiao, Yi;Zhang, Dengying
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.14 no.11
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    • pp.4611-4624
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    • 2020
  • Future network scenario will be a heterogeneous wireless network environment composed of multiple networks and multimode terminals (MMT). Seamless switching and optimal connectivity for MMT among different networks and different services become extremely important. Here, a vertical handoff algorithm combined an improved entropy weighting method based on grey relational analysis (GRA) is proposed. In which, the improved entropy weight method is used to obtain the objective weights of the network attributes, and GRA is done to rank the candidate networks in order to choose the best network. Through simulation and comparing the results with other vertical handoff decision algorithms, the number of handoffs and reversal phenomenon are reduced with the proposed algorithm, which shows a better performance.

Study on the return loss of E-PON optical line (E-PON 광선로망에 있어서의 반사손실 영향분석)

  • Kim, Bo-Gyeom;Choe, Yeong-Bok;O, Ho-Seok;Lee, Won-Hyeong;Park, Tae-Dong
    • 한국정보통신설비학회:학술대회논문집
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    • pp.35-37
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    • 2005
  • 본 논문은 FTTH 의 본격적인 사업에 앞서 순수한 광선희망에서의 반사손실의 영향을 파악하고 문제점 도출 및 해결방안을 찾고자 시스템적인 요소를 제외하고 시험을 하였다. E-PON 광선로망의 반사손실 측정값을 위하여 1 단분기(1*32)에서의 SC/PC, SC/APC, 2 단분기(1*4/1*8)에서의 SC/PC, SC/APC 의 4 가지 형태로 구성하여 측정하였고 SC/PC 커넥터 사용시 단자내가입자단의 공기중에 노출되는 채널수가 많을수록 일정한 패턴을 보이며 반사손실 특성이 저하되었다.

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