• Title/Summary/Keyword: Mobile Network Simulation

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Novel Pre-pushing & Downloading Model in Mobile Peer-assisted Streaming Network

  • Lin, Fuhong;Zhou, Xianewi;Chen, Changjia
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.7 no.12
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    • pp.3135-3148
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    • 2013
  • The popularization of streaming networks and mobile devices brings a new kind of network called mobile peer-assisted streaming network. In this network, service provider not only offers downloading services, but also pre-pushes resources to users for caching. Users can download their demanded resources while working as servers for uploading the cached data. Also the mobile characteristic makes high package losing probability in this network. So we study how the service provider pre-pushes or the user downloads resources efficiently and effectively while considering the package losing in this paper. We build utility models for service provider and user, and solve the models using Bellman's theory to achieve Nash Equilibrium which shows the service provider's optimal pre-pushing speed and user's optimal downloading speed. The numerical simulation demonstrates the efficiency and effectiveness of our proposed pre-pushing and downloading scheme by comparing to the traditional scheme.

A Performance Comparison Routing Protocols for control Mobile Host (Mobile Host 제어를 위한 Routing Protocol 성능 비교)

  • 김탁근;이광재;김동일
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2001.10a
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    • pp.129-132
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    • 2001
  • The ad hoc network was composed of Mobile hosts. Due to the limited transmission range of each mobile node hosts, in such an environment, it is essential for other hosts to coorperate to transfer packet to destination. Moreover, the existing routing protocol algorithms are not efficient on the ad hoc network because a mobile host operates router without fixed router. In this paper, we will compare and analysis for the performance of existing ad hoc network routing protocols through simulation.

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Consistent Distributed Lookup Service Architecture for Mobile Ad-hoc Networks

  • Malik Muhammad Ali;Kim Jai-Hoon
    • International Journal of Contents
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    • v.2 no.2
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    • pp.29-31
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    • 2006
  • Mobile Ad hoc network is a self configuring network of mobile nodes. It allows mobile nodes to configure network spontaneously and share their services. In these networks, service discovery is very important because all nodes do not have same resources in term of memory and computing power. Nodes need to use different services offered by different servers. Some service discovery protocols have been proposed in last couple of years but they include significant traffic overhead and for small scale MANETS. In this paper, we present extensible lookup service scheme based on distributed mechanism. In our scheme neighboring nodes of service provider monitor service provider and send notification to lookup server when the service provider terminates its services unexpectedly. Lookup server can find other service provider or other alternative services in advance because of advance notification method and can provide consistent lookup services. In our scheme neighboring nodes also monitor lookup server and send notification to network when lookup server terminates unexpectedly. Simulation results show that our scheme can reduce up to 70% and 30% lookup failure as compare to centralize and simple distributed mechanism respectively.

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Intelligent Control of Mobile robot Using Fuzzy Neural Network Control Method (퍼지-신경망 제어기법을 이용한 Mobile Robot의 지능제어)

  • 정동연;김용태;한성현
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.235-240
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    • 2002
  • This paper presents a new approach to the design of cruise control system of a mobile robot with two drive wheel. The proposed control scheme uses a Gaussian function as a unit function in the fuzzy neural network, and back propagation algorithm to train the fuzzy neural network controller in the framework of the specialized learning architecture. It is proposed a learning controller consisting of two neural network-fuzzy based on independent reasoning and a connection net with fixed weights to simply the neural networks-fuzzy. The performance of the proposed controller is shown by performing the computer simulation for trajectory tracking of the speed and azimuth of a mobile robot driven by two independent wheels.

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Reinforcement learning control of a mobile robot in home network environment

  • Kang, Dong-Oh;Lee, Jeunwoo
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2003.09a
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    • pp.209-212
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    • 2003
  • The following paper deals with a control problem of a mobile robot in home network environment. The home network causes the mobile robot to communicate with sensors to get the sensor measurements and to be adapted to the environment changes. We adopt the reinforcement learning scheme for the solution to the problem, and show some simulation results.

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Path planning algorithm of mobile robot using neural network model (신경회로망 모델을 이용한 이동로봇의 경로생성 알고리즘)

  • 차영엽;유창목
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.1601-1604
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    • 1997
  • The most important topic in research of mobile robot is path planning in order to avoid with obstacle. In this study the path planning algorithm using a neural network model is proposed. The inputs of neural network are range data which are acquired form laser range finderm and weights are based on difference with goal direction. The thresholds are made by consdiering the marginal distance between mobile robot and obstacle. Consequently the outputs are obtained by multiplying input and weight. The obtained heading directiion enables the mobile robot to approach the goal, without any collision with obstacles around. The effectiveness of the this method of real-time navigation of a mobile robot is estimated by computer simulation in complex environment.

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Development of Baby Care Mobile Application Using Smart Sensor (스마트 센서를 이용한 Baby Care 모바일 어플리케이션 개발)

  • Chung, Jae-Pil
    • Journal of Advanced Navigation Technology
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    • v.19 no.6
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    • pp.643-647
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    • 2015
  • Nowadays, ubiquitous technology which combines sensors and network technology is emerging and it is called ubiquitous sensor network (USN). In this paper, mobile application for baby care using smart sensor is proposed. The proposed mobile application consists of mobile networks to transfer the information. It detects various information such as falling detecting, crying and fever detecting of infants. It keeps infants from external threats. The developed mobile application will be examined by simulation.

A Performance Simulation for Call Capacity of Base Station in CDMA Mobile System (CDMA Mobile System의 Base Station호 처리 용량 성능 시뮬레이션)

  • Lee, Dong-Myeong;Jeon, Mun-Seok;Lee, Cheol-Hui
    • The Transactions of the Korea Information Processing Society
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    • v.3 no.5
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    • pp.1253-1261
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    • 1996
  • The base station (BS) of CDMA mobile system (CMS) provides mobile call services by controlling call processing functions. The call Processing part of the BS is divided into two components; the base station transceiver subsystem (BTS) and the base station controller (BSC). In this paper, we present the call capacity estimation of the BS about control signals and traffic data of calls by the simulation, and find the bottleneck points and problems which may occur in the BS. In order to estimate the call capacity, first we extract the major parameters for the modeling the BS. Second, we suggest the simulation model for the BS. Third, we estimate the simulation results by finding major objective factors such that the call blocking probability, the utilization ratio and the delay time in the traffic channel elements (TCEs), the BTS interconnection network (BIN)-COMA interconnection network (CIN) trunks, the transcoding channels and the CIN packet router.

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Reactive Routing Keyword based Routing Procedure in MANET (MANET에서의 Reactive Routing Keyword 기반 라우팅 프로시듀어)

  • Park Soo-Hyun;Shin Soo-Young
    • Journal of the Korea Society for Simulation
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    • v.13 no.4
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    • pp.55-69
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    • 2004
  • In MANET(Mobile Ad-hoc Network), unlike in wired networks, a path configuration should be in advance of data transmission along a routing path. Frequent movement of mobile nodes, however, makes it difficult to maintain the configured path and requires re-configuration of the path very often. It may also leads to serious problems such as deterioration of QoS in mobile ad-hoc networks. In this paper, we proposed a Reactive Routing Keyword (RRK) routing procedure to solve those problems. Firstly, we noticed it is possible in RRK routing to assign multiple routing paths to the destination node. We applied this feature into active networks and SNMP information based routing by storing unique keywords in cache of mobile nodes corresponding to present and candidate routings in a path configuration procedure. It was shown that the deterioration of QoS which may observed in Dynamic Source Routing(DSR) protocol was greatly mitigated by using the proposed routing technique.

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Mobile Sink Routing Scheme for Sensor Networks (센서 네트워크에서 이동 싱크 라우팅 기법)

  • Hwang, Mi-Young;Park, Sang-Joon;Khil, A-Ra;Kim, Byung-Gi
    • Journal of the Korea Society for Simulation
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    • v.15 no.4
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    • pp.107-117
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    • 2006
  • Wireless Sensor Network consists of sensor nodes and sink. A sink receives and processes signals created from sensor nodes. Many studies have been performed, since sensor network allows multiple nodes to run using a limited amount of energy, Most researches have focused on using fixed sink. However, in many cases, the sink has mobility effected by man, cars, and etc. This research proposes three methods for reducing the node's energy consumption which is applied the Grid method based on mobile sink. Most routing processes handled by the mobile sink and wireless sensor area is separated and operated respectively. So, this research allows decreasing the power costs. In addition, it also proposes methods using simulation to test the quality of the performance.

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