• Title, Summary, Keyword: Mobility

Search Result 7,106, Processing Time 0.086 seconds

Global Mobility Support in Network Based Proxy Mobile IPv6 (네트워크 기반 프록시 모바일 IPv6에서 글로벌 이동 지원에 관한 연구)

  • Phung, Gia Khiem;Ro, Soong-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.35 no.7A
    • /
    • pp.688-696
    • /
    • 2010
  • The Proxy Mobile IPv6 (PMIPv6) is a network localized mobility management protocol that is independent of global mobility management protocols. In a single mobility domain (LMD), the mobile node (MN) is not involved in any IP mobility-related signaling and uses only its PMIPv6 home address for all its communication. Subsequently, when the MN moves into another LMD, the MN must change its PMIPv6 home address. In such a circumstance, host-based mobility signaling is activated. Thus, the nature of the network-based mobility of the PMIPv6 cannot be retained. Additionally, if the MN does not support global mobility, it cannot maintain communication with its correspondent node (CN). In this paper, we propose a solution for global mobility support in PMIPv6 networks, called Global-PMIPv6 that allows current communication sessions of a MN without mobility protocol stacks to be maintained, even when the MN moves into another LMD. Thus, Global-PMIPv6 retains the advantages of the PMIPv6 for global mobility support. We then evaluate and compare network performance between our proposed solution and PMIPv6.

Promoting Mobility in Older People

  • Rantanen, Taina
    • Journal of Preventive Medicine and Public Health
    • /
    • v.46 no.sup1
    • /
    • pp.50-54
    • /
    • 2013
  • Out-of-home mobility is necessary for accessing commodities, making use of neighborhood facilities, and participation in meaningful social, cultural, and physical activities. Mobility also promotes healthy aging as it relates to the basic human need of physical movement. Mobility is typically assessed either with standardized performance-based tests or with self-reports of perceived difficulty in carrying out specific mobility tasks. Mobility declines with increasing age, and the most complex and demanding tasks are affected first. Sometimes people cope with declining functional capacity by making changes in their way or frequency of doing these tasks, thus avoiding facing manifest difficulties. From the physiological point of view, walking is an integrated result of the functioning of the musculoskeletal, cardio-respiratory, sensory and neural systems. Studies have shown that interventions aiming to increase muscle strength will also improve mobility. Physical activity counseling, an educational intervention aiming to increase physical activity, may also prevent mobility decline among older people. Sensory deficits, such as poor vision and hearing may increase the risk of mobility decline. Consequently, rehabilitation of sensory functions may prevent falls and decline in mobility. To promote mobility, it is not enough to target only individuals because environmental barriers to mobility may also accelerate mobility decline among older people. Communities need to promote the accessibility of physical environments while also trying to minimize negative or stereotypic attitudes toward the physical activity of older people.

The Degradations of Effective Mobility in Surface Channel MOS Devices (표면 채널 모스 소자에서 유효 이동도의 열화)

  • 이용재;배지칠
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.51-54
    • /
    • 1996
  • This paper reports the studies of the inversion layer mobility in p-channel Si MOSFET's under hot-carrier degradated condition. The validity of relationship of hot carrier degradations between the surface effective mobility and field effect mobility and are examined. The effective mobility(${\mu}$$\_$eff/) is derived from the channel conductances, while the field-effect mobility(${\mu}$$\_$FE/) is obtained from the transconductance. The characteristics of mobility curves can be divided into the 3 parts of curves. It was reported that the mobility degradation is due to phonon scattering, coulombic scattering and surface roughness. We are measured the mobility slope in curves with DC-stress [V$\_$g/=-3.1v]. It was found that the mobility(${\mu}$$\_$eff/ and ${\mu}$$\_$FE/) of p-MOSFET's was increased by increasing stress time and decreasing channel length. Because of the increasing stress time and increasing V$\_$g/ is changed oxide reliability and increased vertical field.

  • PDF

Degradation Characteristics of Mobility in Channel of P-MOSFET's by Hot Carriers (핫 캐리어에 의한 피-모스 트랜지스터의 채널에서 이동도의 열화 특성)

  • 이용재
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.11 no.1
    • /
    • pp.26-32
    • /
    • 1998
  • We have studied how the characteristics degradation between effective mobility and field effect mobility of gate channel in p-MOSFET's affects the gate channel length being follow by increased stress time and increased drain-source voltage stress. The experimental results between effective and field-effect mobility were analyzed that the measurement data are identical at the point of minimum slope in threshold voltage, the other part is different, that is, the effective mobility it the faster than the field-effect mobility. Also, It was found that the effective and field-effect mobility. Also, It was found that the effective and field-effect mobility of p-MOSFET's with short channel are increased by decreased channel length, increased stress time and increased drain-source voltage stress.

  • PDF

Mobility Determination of Thin Film a-Si:H and poly-Si

  • Jung, S.M.;Choi, Y.S.;Yi, J.S.
    • Journal of Sensor Science and Technology
    • /
    • v.6 no.6
    • /
    • pp.483-490
    • /
    • 1997
  • Thin film Si has been used in sensors, radiation detectors, and solar cells. The carrier mobility of thin film Si influences the device behavior through its frequency response or time response. Since poly-Si shows the higher mobility value, a-Si:H films on Mo substrate were subjected to various crystallization treatments. Consequently, we need to find an appropriate method in mobility measurement before and after the anneal treatment. This paper investigates the carrier mobility improvement with anneal treatments and summarizes the mobility measurement methods of the a-Si:H and poly-Si film. Various techniques were investigated for the mobility determination such as Hall mobility, HS, TOF, SCLC, TFT, and TCO method. We learned that TFT and TCO method are suitable for the mobility determination of a-Si:H and poly-Si film. The measured mobility was improved by $2{\sim}3$ orders after high temperature anneal above $700^{\circ}C$ and grain boundary passivation using an RF plasma rehydrogenation.

  • PDF

A study on the mobility control in the next generation wireless mobile network (차세대 무선 이동 통신망에서의 이 동성 제어 방안에 관한 고찰)

  • Kim, Duck-Jung;Kim, Jae-Hak;Kim, Hyoung-Taek;Ahn, Gil-Whan
    • 한국정보통신설비학회:학술대회논문집
    • /
    • /
    • pp.273-278
    • /
    • 2007
  • In the next generation wireless mobile network, various methods are studied to offer interworking and mobility between various radio networks. To offer these harmoniously, network adaptation methods based on IP is generalized, and specifications of host-based mobility method with Mobile IPv4 and Mobile IPv6 to offer IP's mobility are defined in IETF specially. However, it is insufficient to satisfy quality of service that should be offered in wireless mobile network environment. Alternatively studies about Network-Based Mobility of Proxy Mobile IPv4, Proxy Mobile IPv6 etc. are preceded. This paper presents optimum plan that can offer mobility in the next generation radio transfer communication network by comparing and analyzing IP mobility methods divided by Host-based Mobility and Network-based Mobility.

  • PDF

Supporting Intermediate-node Mobility in CCN Real-time Service according to Mobility Detection (CCN 실시간 서비스에서 이동성 탐지에 따른 중간노드의 이동성 지원)

  • Seong, Kukil;Kwon, Taewook
    • Journal of Korea Multimedia Society
    • /
    • v.22 no.12
    • /
    • pp.1438-1446
    • /
    • 2019
  • Recently, the number of mobile users as well as high-speed Internet user has been increasing rapidly. Moreover, traffic is growing fast as services that provide real-time content such as Youtube and Netflix become popular. The problem of traffic control in real-time content services is important because many people use cell phones to receive real-time content. In this regard, the field of CCN is currently being studied. We studied the mobility of nodes among CCN research fields. Node mobility can be divided into three categories : consumer mobility, intermediate node, and provide mobility. In this paper, we propose Mobility Node Support(MD-INS) to support the intermediate-node mobility in CCN real-time services. Experimental results show that the proposed scheme shows better performance than CCN in terms of service disconnection time and packet loss.

A Development of Staff Mobility in the System of Strategic Human Resource Management

  • Aigul, Otarbayeva;Samal, Tazhiyeva
    • The Journal of Business Economics and Environmental Studies
    • /
    • v.5 no.2
    • /
    • pp.31-36
    • /
    • 2015
  • Purpose - This work aims to study the existing management process and methods of statistical evaluation of personnel mobility management, and propose improvement measures. This is particularly relevant in today's market economy because proper organization of personnel movement affects the availability and effective utilization of human resources in enterprises. Hence, it influences the volume, timely execution of work, equipment efficiency, and consequently the volume of production, its cost, profit, and other economic indicators. Research design, data, and methodology - We investigate the indicators that measure staff mobility, and their dependent consequences. Further, it analyses the factors influencing high staff turnover, which is a main indicator of staff mobility. Results - Measures for staff mobility development and prevention of turnover are proposed. Micom Systems is a sample case that has developed special programs to reduce staff turnover. Conclusions - Staff mobility leads to additional costs, significant loss of working time, and increase in defects. However, the advantages of staff mobility outweigh these negative factors. The role of staff mobility in a market economy cannot be overestimated.

Enhanced Handoff for Micro Mobility Protocol (Micro Mobility Protocol의 핸드오프 성능개선)

  • Jung, Won-Soo;Yun, Chan-Young;Oh, Young-Hwan
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.209-211
    • /
    • 2004
  • We can categorize mobility two main fields in IP environment. If Mobile IP manages macro mobility, Cellular IP deal with micro mobility. For seamless connection, it is major problem to reduce packet loss in the network layer during handoff. This paper will introduce a scheme which reduces packet loss during micro mobility which use indirect handoff mechanism in Cellular IP, and will verify the efficiency of that scheme by computer simulation.

  • PDF

Substrate Doping Concentration Dependence of Electron Mobility Enhancement in Uniaxial Strained (110)/<110> nMOSFETs

  • Sun, Wookyung;Choi, Sujin;Shin, Hyungsoon
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.14 no.5
    • /
    • pp.518-524
    • /
    • 2014
  • The substrate doping concentration dependence of strain-enhanced electron mobility in (110)/<110> nMOSFETs is investigated by using a self-consistent Schr$\ddot{o}$dinger-Poisson solver. The electron mobility model includes Coulomb, phonon, and surface roughness scattering. The calculated results show that, in contrast to (100)/<110> case, the longitudinal tensile strain-induced electron mobility enhancement on the (110)/<110> can be increased at high substrate doping concentration.