• Title/Summary/Keyword: Adaptive network management

Search Result 198, Processing Time 0.029 seconds

A Study On Adaptive Correlator Receiver with Narrow-band Interferance in CDMA System (CDMA System에서 협대역 간섭제거 적응 상관기에 관한 연구)

  • Jeong Chan-Ju;Yang Hwa-Sup;Kim Yong-Shik;Oh Seung-Jae;Kim Jae-Gab
    • Management & Information Systems Review
    • /
    • v.3
    • /
    • pp.201-214
    • /
    • 1999
  • Adaptive correlator receiver with neural network based on complex multilayer perceptron is persented for suppressing interference of narrow-band of direct spread spectrum communication systems. Recursive least square algorithm with backpropagation error is used for fast convergence and better performance in adaptive correlator scheme. According to signal noise and transmission power, computer simulation results show that bit error ratio of adaptive correlator using neural network improved that of adative transversal filter of direct sequence spread spectrum considering of jamming and narrow-band interference. Bit error ratio of adaptive correlator with neural network is reduced about 10-1 than that of adaptive transversal filter where interference versus signal ratio is 5dB.

  • PDF

Policy-Based QoS Management for SLA-Driven Adaptive Routing

  • Katsikogiannis, George;Mitropoulos, Sarandis;Douligeris, Christos
    • Journal of Communications and Networks
    • /
    • v.15 no.3
    • /
    • pp.301-311
    • /
    • 2013
  • This paper proposes a policy-based quality of service (QoS) management framework for adaptive routing decisions. We present an approach considering interior gateway protocol (IGP) for path discovery mechanisms and QoS-aware policies for configuring the network elements. The integration of the aforementioned modules into this policy-based network management (PBNM) system is demonstrated by conducting experiments in a real environment, the hellenic public administration network SYZEFXIS. These experiments combine different traffic conditioning mechanisms through event detectors, consider IP service level agreement mechanisms that interoperate with the PBNM system and analyze the enforcement of IGP and QoS policies. Finally, validation and measurement tools are used to prove the efficiency of this framework. It is shown that this architecture offers significantly increased performance and learning capabilities, while the PBNM system achieves adaptive QoS routing through automated configuration considering the avoidance of suboptimal routing issues or under-performance conditions of the network entities.

ARM: Adaptive Resource Management for Wireless Network Reliability (무선 네트워크의 신뢰성 보장을 위한 적응적 자원 관리 기법)

  • Lee, Kisong;Lee, Howon
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.18 no.10
    • /
    • pp.2382-2388
    • /
    • 2014
  • To provide network reliability in indoor wireless communication systems, we should resolve the problem of unexpected network failure rapidly. In this paper, we propose an adaptive resource management (ARM) scheme to support seamless connectivity to users. In consideration of system throughput and user fairness simultaneously, the ARM scheme adaptively determines the set of healing channels, and performs scheduling and power allocation iteratively based on a constrained non-convex optimization technique. Through intensive simulations, we demonstrate the superior performance results of the proposed ARM scheme in terms of the average cell capacity and user fairness.

A Location Management with Adaptive Binding Idle Lifetime Scheme for IP-based Wireless Network

  • Sim Seong-Soo;Yoon Won-Sik
    • Proceedings of the IEEK Conference
    • /
    • 2004.06a
    • /
    • pp.261-264
    • /
    • 2004
  • We propose a location management with adaptive binding idle lifetime scheme for IP-based wireless network. In our proposed scheme, the binding idle lifetime value is adaptively varied according to user characteristics. The main idea is that the mobile node (MN) does location update (LU) even in idle state. Furthermore a sequential paging scheme is used to reduce the paging cost. The proposed scheme can be used in both cellular network and IP-based network.

  • PDF

The Concept of Human Resource Management in Logistics Processes

  • Shtuler, Iryna;Zabarna, Eleonora;Kyrlyk, Nataliya;Kostovyat, Hanna
    • International Journal of Computer Science & Network Security
    • /
    • v.21 no.12
    • /
    • pp.110-116
    • /
    • 2021
  • The article focuses on the need to deepen the issue of human resource management in logistics processes. It is noted that changes in market conditions and turbulence in the institutional environment require managers to form a highly effective human resources policy capable to ensure the innovative development of the enterprise. Functional strategies for human resource management in logistical processes are proposed, namely: adaptive, innovative, selective and exclusive. Innovative technologies that should be used in the adaptive human resources policy process are identified.

An Efficient Node Life-Time Management of Adaptive Time Interval Clustering Control in Ad-hoc Networks (애드혹 네트워크에서 적응적 시간관리 기법을 이용한 클러스터링 노드 에너지 수명의 효율적인 관리 방법)

  • Oh, Young-Jun;Lee, Knag-Whan
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.17 no.2
    • /
    • pp.495-502
    • /
    • 2013
  • In the mobile Ad hoc Network(MANET), improving technique for management and control of topology is recognized as an important part of the next generation network. In this paper, we proposed an efficient node life time management of ATICC(Adaptive Time Interval Clustering Control) in Ad-hoc Networks. Ad-hoc Network is a self-configuration network or wireless multi-hop network based on inference topology. This is a method of path routing management node for increasing the network life time through the periodical route alternation. The proposed ATICC algorithm is time interval control technique depended on the use of the battery energy while node management considering the attribute of node and network routing. This can reduce the network traffic of nodes consume energy cost effectively. As a result, it could be improving the network life time by using timing control method in ad-hoc networks.

A Novel Adaptive Routing Algorithm for Delay-Sensitive Service in Multihop LEO Satellite Network

  • Liu, Liang;Zhang, Tao;Lu, Yong
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.10 no.8
    • /
    • pp.3551-3567
    • /
    • 2016
  • The Low Earth Orbit satellite network has the unique characteristics of the non-uniform and time-variant traffic load distribution, which often causes severe link congestion and thus results in poor performance for delay-sensitive flows, especially when the network is heavily loaded. To solve this problem, a novel adaptive routing algorithm, referred to as the delay-oriented adaptive routing algorithm (DOAR), is proposed. Different from current reactive schemes, DOAR employs Destination-Sequenced Distance-Vector (DSDV) routing algorithm, which is a proactive scheme. DSDV is extended to a multipath QoS version to generate alternative routes in active with real-time delay metric, which leads to two significant advantages. First, the flows can be timely and accurately detected for route adjustment. Second, it enables fast, flexible, and optimized QoS matching between the alternative routes and adjustment requiring flows and meanwhile avoids delay growth caused by increased hop number and diffused congestion range. In addition, a retrospective route adjustment requesting scheme is designed in DOAR to enlarge the alternative routes set in the severe congestion state in a large area. Simulation result suggests that DOAR performs better than typical adaptive routing algorithms in terms of the throughput and the delay in a variety of traffic intensity.

Adaptive Queue Management Based On the Change Trend of Queue Size

  • Tang, Liangrui;Tan, Yaomu
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.13 no.3
    • /
    • pp.1345-1362
    • /
    • 2019
  • Most active queue management algorithms manage network congestion based on the size of the queue but ignore the network environment which makes queue size change. It seriously affects the response speed of the algorithm. In this paper, a new AQM algorithm named CT-AQM (Change Trend-Adaptive Queue Management) is proposed. CT-AQM predicts the change trend of queue size in the soon future based on the change rate of queue size and the network environment, and optimizes its dropping function. Simulation results indicate that CT-AQM scheme has a significant improvement in loss-rate and throughput.

Traffic Forecast Assisted Adaptive VNF Dynamic Scaling

  • Qiu, Hang;Tang, Hongbo;Zhao, Yu;You, Wei;Ji, Xinsheng
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.16 no.11
    • /
    • pp.3584-3602
    • /
    • 2022
  • NFV realizes flexible and rapid software deployment and management of network functions in the cloud network, and provides network services in the form of chained virtual network functions (VNFs). However, using VNFs to provide quality guaranteed services is still a challenge because of the inherent difficulty in intelligently scaling VNFs to handle traffic fluctuations. Most existing works scale VNFs with fixed-capacity instances, that is they take instances of the same size and determine a suitable deployment location without considering the cloud network resource distribution. This paper proposes a traffic forecasted assisted proactive VNF scaling approach, and it adopts the instance capacity adaptive to the node resource. We first model the VNF scaling as integer quadratic programming and then propose a proactive adaptive VNF scaling (PAVS) approach. The approach employs an efficient traffic forecasting method based on LSTM to predict the upcoming traffic demands. With the obtained traffic demands, we design a resource-aware new VNF instance deployment algorithm to scale out under-provisioning VNFs and a redundant VNF instance management mechanism to scale in over-provisioning VNFs. Trace-driven simulation demonstrates that our proposed approach can respond to traffic fluctuation in advance and reduce the total cost significantly.

Adaptive Overlay Network Management Algorithms for QoS sensitive Multimedia Services (멀티미디어 서비스의 품질 보장을 위한 오버레이 네트워크 관리 기법에 대한 연구)

  • Kim, Sung-Wook;Kim, Sung-Chun
    • The KIPS Transactions:PartC
    • /
    • v.14C no.1 s.111
    • /
    • pp.81-86
    • /
    • 2007
  • New multimedia services over the cellular/WLAN overlay networks require different Quality of Service (QoS). Therefore, efficient network management system is necessary in order to provide QoS sensitive multimedia services while enhancing network performance. In this paper, we propose a new online network management scheme that implements bandwidth reservation, congestion and transmission control strategies. Our online approach to network management exhibits dynamic adaptability, flexibility, and responsiveness to the current traffic conditions in multimedia overlay networks. Simulation results indicate the superior performance of our proposed scheme to strike the appropriate performance balance between contradictory QoS requirements under widely varying diverse traffic loads.