• 제목/요약/키워드: mobile communication network

검색결과 2,173건 처리시간 0.037초

Predicting required licensed spectrum for the future considering big data growth

  • Shayea, Ibraheem;Rahman, Tharek Abd.;Azmi, Marwan Hadri;Han, Chua Tien;Arsad, Arsany
    • ETRI Journal
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    • 제41권2호
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    • pp.224-234
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    • 2019
  • This paper proposes a new spectrum forecasting (SF) model to estimate the spectrum demands for future mobile broadband (MBB) services. The model requires five main input metrics, that is, the current available spectrum, site number growth, mobile data traffic growth, average network utilization, and spectrum efficiency growth. Using the proposed SF model, the future MBB spectrum demand for Malaysia in 2020 is forecasted based on the input market data of four major mobile telecommunication operators represented by A-D, which account for approximately 95% of the local mobile market share. Statistical data to generate the five input metrics were obtained from prominent agencies, such as the Malaysian Communications and Multimedia Commission, OpenSignal, Analysys Mason, GSMA, and Huawei. Our forecasting results indicate that by 2020, Malaysia would require approximately 307 MHz of additional spectrum to fulfill the enormous increase in mobile broadband data demands.

Context-Aware Mobile Gateway Relocation Scheme for Clustered Wireless Sensor Networks

  • Encarnacion, Nico N.;Yang, Hyunho
    • Journal of information and communication convergence engineering
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    • 제10권4호
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    • pp.365-371
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    • 2012
  • In recent years, researchers have been attracted to clustering methods to improve communication and data transmission in a network. Compared with traditional wireless networks, wireless sensor networks are energy constrained and have lower data rates. The concept of implementing a clustering algorithm in an existing project on gateway relocation is being explored here. Low energy adaptive clustering hierarchy (LEACH) is applied to an existing study on relocating a gateway. The study is further improved by moving the gateway to a specific cluster based on the number or significance of the events detected. The protocol is improved so that each cluster head can communicate with a mobile gateway. The cluster heads are the only nodes that can communicate with the mobile gateway when it (the mobile gateway) is out of the cluster nodes' transmission range. Once the gateway is in range, the nodes will begin their transmission of real-time data. This alleviates the load of the nodes that would be located closest to the gateway if it were static.

이동통신 시스템에서 인공지능을 이용한 경로 손실 예측 및 기지국 지형 구분 방법 (Method of Predicting Path Loss and Base Station Topography Classification using Artificial Intelligent in Mobile Communication Systems)

  • 김재정;이희준;지승환
    • 한국정보통신학회논문지
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    • 제26권5호
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    • pp.703-713
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    • 2022
  • 이동통신 시스템에서 정확하고 신속한 통신망 구축은 중요하다. 현재 무선통신 시스템을 구성하기 위해서는 셀 플래닝 장비를 통해 기지국의 파라미터를 설정한다. 하지만 기지국의 신규 설치마다 셀 플래닝을 새로 수행해야 하며, 셀 플래닝에 반영되지 않은 장애물 정보 등 실제 환경과 맞지 않는 파라미터가 설정되는 문제가 발생할 수 있다. 이 논문에서는 SON 서버에서 기지국의 위치와 단말의 측정 정보를 이용한 DNN 모델을 통해 경로 손실 예측을 수행하고, 지형을 구분하는 CNN 모델을 통해 예측된 경로 손실의 지형을 구분한다. 구분된 지형을 바탕으로 SON 서버에서 해당 지형에 맞는 지형별 기지국 파라미터를 자동으로 설정하고 지속해서 지형별 파라미터를 업데이트하여, 지형과 주변 환경 변화를 고려한 기지국 파라미터를 자동으로 설정할 수 있다.

네트워크 코딩을 이용한 PON기반 무선백홀 연구 (A Study on PON-based Mobile Backhaul Using Network Coding)

  • 정복래
    • 한국인터넷방송통신학회논문지
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    • 제13권2호
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    • pp.275-280
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    • 2013
  • 구리선 기반의 기존 무선 백홀 기술들은 급속히 증가하는 무선 멀티미디어 서비스 요구를 수용하지 못하고 조만간 용량의 한계에 도달할 것이다. PON 기술은 광섬유의 대역이득으로 획기적인 네트워크 용량을 제공하는 동시에 유지 및 보수비용이 저렴하여 기존 무선 백홀을 대체할 기술로 주목 받고 있다. 수십 기가대의 넓은 대역폭을 제공하는 PON기반 무선 백홀을 바탕으로, 무선 환경에서도 화상회의와 IPTV와 같은 광대역 멀티미디어 서비스를 무리없이 받을 수 있다. 본 논문에서는 우선 PON기반 무선 백홀 기술의 개요와 장점을 소개한다. PON-무선 결합망의 현실적인 예로 EPON-WiMAX의 세 가지 결합망 구조를 제시하고 그 특징을 경제적인 측면과 네트워크 성능의 측면에서 비교 분석한다. 그 후, PON-무선 결합 망에서 상당 부분을 차지할 멀티캐스트 기반 트래픽 전송에 효과적인 네트워크 코딩을 적용할 경우 기대되는 효과, 결합 망구조, 적용방안을 제시한다.

A Novle Method for Efficient Mobile AR Service in Edge Mesh Network

  • Choi, Seyun;Shim, Woosung;Hong, Sukjun;Kim, Hoijun;Lee, Seunghyun;Kwon, Soonchul
    • International Journal of Internet, Broadcasting and Communication
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    • 제14권3호
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    • pp.22-29
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    • 2022
  • Recently, with the development of mobile computing power, mobile-based VR and AR services are being developed. Due to network performance and computing power constraints, VR and AR services using large-capacity 3D content have limitations. A study on an efficient 3D content load method for a mobile device is required. The conventional method downloads all 3D content used for AR services at the same time. In this paper, we propose an active 3D content load according to the user's track. The proposed method is a partitioned 3D object load. Edge servers were installed for each area and connected through the MESH network. Partitioned load the required 3D object in the area referring to the user's location. The location is identified through the edge server information of the connected AP. The performance of the proposed method and the conventional method was compared. As a result of the comparison, the proposed method showed a stable Mobile AR Service. The results of this study, it is expected to contribute to the activation of edge server-based AR mobile services.

NB-IoT를 활용한 발열 제어 시스템 구현 (Implementation of Heat Control System using NB-IoT)

  • 신동근;김형진
    • 한국정보전자통신기술학회논문지
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    • 제12권2호
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    • pp.135-141
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    • 2019
  • 사물인터넷이 활성화 되면서 많은 센서 디바이스들이 늘어나고 있다. 센서들은 네트워크 유선망을 설치하여 사용하거나 이동통신망을 사용할 수 있다. 이동통신망은 전송률 관점에서 볼 때 크게 고속 통신과 저속통신 두 가지로 분류 할 수 있다. 이동 통신망에서 수억 개의 센서들의 경우 고속 통신을 사용하기에는 자원 낭비가 심하게 발생하게 된다. 이러한 자원을 낭비하지 않고 전송 속도를 줄이고 자원을 적절히 할당하여 이용할 수 있는 통신이 필요하다. 최근 이동통신에서 저전력 기술 중 하나인 협대역 인터넷(NB-IoT)이 여러 기업에서 각광받고 있다. 현재 NB-IoT 또는 기타 저전력 통신들만이 빠르게 늘어나는 센서 디바이스들을 인터넷에 연결시킬 수 있는 가능성을 가지고 있다고 볼 수 있다. 본 논문에서는 화웨이 NB-IoT 통신 모듈을 이용한 히터 제어 장치, 제어 장치의 정보를 수집하는 서버, 장치에 기본 설정을 할 수 있는 응용프로그램을 설계 및 구현하였다. 이 시스템의 주요 기능은 온도 및 히터 상태 수집하여 서버에 주기 보고, 서버에서의 히터 제어, 히터가 자동으로 동작하기 위한 파라미터 설정이 있다. 본 시스템은 히터뿐만 아니라 도로 정보, 스마트 농업, 소규모 저수지 등 유선 통신이 구축 되지 않은 곳에 응용할 수 있다.

Issues on Radio Access Technologies for the Fourth-Generation Mobile Communication System

  • Kim, Jin-Young
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2002년도 ITC-CSCC -3
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    • pp.1459-1462
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    • 2002
  • Emergence of the fourth generation mobile communication system (4G system) is now in its dawn. This paper pro- poses a perspective framework on the 4G system, and discusses system aspects of radio access technologies. The focus of the paper is to define the scope and features of the 4G system in an overall system/network viewpoint. From the foreseeable development trends, it is highly expected that whatever emerges in the 4G system will be some kind of constantly evolving and grand recursive concatenation of all the existing system/network developments.

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Overview of the Sambodana Project: Development of Mobile Communication Security System using Hardening Android

  • Cahyo, Darujati;Moh Noor Al, Azam
    • International Journal of Computer Science & Network Security
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    • 제22권12호
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    • pp.57-62
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    • 2022
  • The Sambodana project is a mobile communication security system development project using Hardening Android. The initial idea for this project is that information leakage occurs outside of a communications application with end-to-end cryptographic security. Android hardening prevents unwanted applications and bloatware from being installed, such as unavailable Google Play Store or install restrictions.

Verification of Authentication Protocol for CDMA Mobile Communication Network

  • Hong, Ki-Yoong;Kim, Seok-Woo;Kim, Dong-Kyoo
    • Journal of Electrical Engineering and information Science
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    • 제1권1호
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    • pp.82-90
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    • 1996
  • In this paper, we present an analysis of the IS-95 authentication protocol for the Code Division Multiple Access(CDMA) mobile communication network. We propose a mutual authentication protocol, AP-6, to improve the security and correctness. Formal description and verification of the proposed AP-6 are also presented on the basis of the formal logic. It is shown that the proposed AP-6 is more secure and correct than the IS-95 authentication protocol.

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New Trend Proposal in Optimization Techniques Application for Mobile Network, Analysis and Signal Processing

  • HAMROUNI, Chafaa
    • Journal of Multimedia Information System
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    • 제7권3호
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    • pp.221-230
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    • 2020
  • Used optimization techniques as solution for mobile network have been implemented as a reference systems for various applications against fading and signals perturbation, in addition each transition to 5th generation telecommunication standards require a deep studies in order to park an applied instantaneous process. The paper describes a preliminary planning and a careful preparation to update both subscriber radio access network as well as data transmission network this approach conducts to make network resource updates invisible for customers and with minimal costs for mobile operators basically in terms of delay. In addition, network operators transit to mobile networks, multimedia services efficient delivery are considered the challenging application and the most promising for mobile network operators today, this work conduct to optimize video consumption of mobile users which are exponentially increasing. The interference is a complex phenomenon in mobile radio telecommunication system, and a mobile phone can be a source of interference to another one. Actual advances in technology necessitate the need for the complicated software solution that can take several unexpected phenomena in consideration to rise to a level higher than ever. The capability needs today require the use of Drive test which is used to take the performance of network in the field by using a special software called TEMS investigation, it have been implemented as standalone systems for various applications. The paper focuses on considering as the best technical for optimization of mobile networks, analysis and processing of signal, a Drive Test is the method used to take the performance of network in the field by using a special software called TEMS investigation. Most used in the world, this software is reputed to detect and analyze many problems of mobile network between the mobile phone and the transmitter: BTS in case of GSM and Node B for UMTS. An example of that is interference in radio communication. It exists permanently and it degrades considerably the quality of received signal when it exceeds certain levels.