• Title/Summary/Keyword: power-based routing

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A Study on the Optimal Routing Technique for the Improvement of Voltage Stability in Radial Power System (방사상 전력계통의 전압안정도 향상을 위한 최적 라우팅 기법에 관한 연구)

  • Kim, Byung-Seop;Shin, Joong-Rin;Park, Jong-Bae
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.51 no.11
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    • pp.568-576
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    • 2002
  • This paper presents a new algorithm for the enhancement of voltage stability by optimal routing (OR) technique. A new voltage stability index (VSI) for optimal routing is also proposed by using theories of critical transmission path based on voltage phasor approach and equivalent impedance method. Furthermore, the proposed algorithm automatically detect the critical transmission path to critical transmission path to critical load which are faced to voltage collapse due to additional real or reactive loading. We also adopt a improved branch exchange (IBE) algorithm based on a tie branch power (TBP) flow equation to apply the OR technique. The proposed IBE algorithm for the VSI maximizing can effectively search the optimal topological structures of distribution feeders by changing the open/closed states of the sectionalizing and tie switches. The proposed algorithm has been evaluated with the practical IEEE 32, 69 bus test systems and KEPCO 148 bus test system to show favorable performance.

Data Urgency Based Routing Scheme in Wireless Sensor Networks (무선 센서네트워크에서 데이터 긴급성에 기반한 라우팅기법)

  • Kang, Min-Seung;Park, Hyung-Kun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.05a
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    • pp.516-517
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    • 2021
  • When designing a routing protocol in a wireless sensor network, power efficiency and power balance must be considered above all for the life of the network. However, in application services such as environmental monitoring, the urgency and speed of data are more importantly required. In this paper, a routing protocol is proposed to satisfy different requirements for transmission of normal data and emergency data. In the case of general data, it is designed to minimize the power imbalance so that the network life can be extended. In the case of emergency data, the delay is minimized by controlling the power according to the power situation of the node.

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Optimal Feeder Routing for Distribution System Planning Using a Heuristic Strategy (휴리스틱 탐색전략을 이용한 배전계통 계획의 급전선 최적 경로 선정)

  • Choi, Nam-Jin;Kim, Byung-Seop;Shin, Joong-Rin
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.49 no.11
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    • pp.566-574
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    • 2000
  • This paper propose a heuristic algorithm based on the Branch-Exchange (BE) method to solve Optimal feeder Routing(OFR) problem for the distribution system planning. The cost function of the OFR problem is consisted of the investment cost representing the feeder installation and the system operation cost representing the system power loss. We propose a properly designed heuristic strategy, which can handle the horizon-year expansion planning problem of power distribution network. We also used the loop selection method which can define the maximum loss reduction in the network to reduce calculation time, and proposed a new index of power loss which is designed to estimate the power loss reduction in the BE. The proposed index, can be considered with both sides, the low voltage side and voltage side branch connected with tie one. The performances of the proposed algorithms and loss index were shown with 32, 69 example bus system.

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Cooperative Routing of Wireless Ad-hoc Networks in Rayleigh Fading Channel (레일레이 페이딩 채널에서 무선 애드 혹 네트워크의 협동라우팅)

  • Kim, Nam-Soo;An, Beong-Ku;Kim, Do-Hyeon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.3A
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    • pp.290-296
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    • 2007
  • We propose new routing scheme, Cooperative Diversity-based Routing (CDR) which utilizes the cooperative space diversity for power saving and performance enhancement of wireless ad-hoc networks. The improved performance is compared with Multi-hop Relay Routing (NRR) by analytical methods. When the required outage probability is $1\times10^{-3}$ at the destination node in ad-hoc networks with 7 nodes, we noticed that each node can save power consumption by 15.5 dB in average, by using our proposed CDR compared to MRR.

A Study on Voltage Stability Improvement by the Efficient Network Reconfiguration Algorithm

  • Kim, Byung-Seop;Shin, Joong-Rin;Park, Jong-Bae;Shin, Yong-Hak
    • KIEE International Transactions on Power Engineering
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    • v.4A no.2
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    • pp.58-68
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    • 2004
  • This paper presents an optimal routing algorithm (ORA) for maximizing voltage stability as well as for minimizing power loss in radial power systems. In the proposed ORA, a novel voltage stability index (VSI) for real-time assessment is newly introduced based on the conventional critical transmission path framework. In addition, the suggested algorithm can automatically detect the critical transmission paths resulting in voltage collapse when additional real or reactive loads are added. To implement an effective ORA, we have developed an improved branch exchange (IBE) method based on a loss calculation index and tie-branch power flow equations, which are suggested for real-time applications. The proposed algorithm has been tested with IEEE test systems as well as a large-scale power system in Korea to demonstrate its effectiveness and efficiency.

Environment Adaptive WBAN Routing based on Residual energy (에너지량에 기반한 환경 적응 WBAN 라우팅 알고리즘)

  • Kim, Wee-Yeon;Kim, Dae-Young;Shin, Sang-Bae;Cho, Jin-Sung
    • Journal of the Korea Society of Computer and Information
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    • v.16 no.1
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    • pp.89-99
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    • 2011
  • In this paper, we propose an routing algorithm for ultra low power and high reliable transmission in WBAN environment. This algorithm is to minimize energy consumption and to maximize the life and reliability for medical devices. Also, this algorithm is not only medical devices but also non-medical devices is to minimize energy consumption and to maximize the life of device. The combination of the distance from the previous node and residual energy calculates weight. The calculated weight is used to calculate the weight of full path by cumulative weights. The full path to the smallest of the weights are set to the path. Also this algorithm is able to select another path to avoid the error path by determining the link status between nodes, when occurs link error and congestion. In this paper, we show that WSN routing algorithm based on shortest hop count routing algorithm and EAR routing algorithm compared to ensure high reliability and low power characteristic of WBAN to be verified through simulations.

An Energy-efficient Power-aware Routing Protocol based on Load-balancing for Ad hoc Networks (Ad hoc 네트워크 환경에서 부하 균등 기반의 power-aware 라우팅 프로토콜)

  • Kim Dong-hyun;Ha Rhan
    • Proceedings of the Korean Information Science Society Conference
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    • 2005.11a
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    • pp.379-381
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    • 2005
  • Ad hoc 네트워크에서 노드의 한정된 에너지 용량은 개설 경로의 수명과 안정성에 많은 영향을 미치는 요소이다. 따라서 이러한 에너지 한계를 극복하기 위한 다양한 power-aware 라우팅 프로토콜들이 네트워크 계층에서 제안되고 있으며, 이들 라우팅 프로토콜들은 기본적으로 노드의 배터리 잔량 에너지와 전송 전력량을 경로 탐색 과정에서 반영한다. 본 논문에서는 기존의 power-aware 라우팅 프로토콜보다 개설 경로의 동작시간을 높이고 전체 네트워크의 부하균등을 이를 수 있도록 하는 새로운 라우팅 프로토콜을 제안하며 TPR(Traffic load based power-aware routing protocol)로 명명한다. TPR은 NS-2를 이용한 성능 평가를 통해 전체 네트워크의 부하 균등과 개설 경로의 수면, 안정성 측면에서의 개선점을 확인한다.

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Zone based Ad Hoc Network Construction Scheme for Local IoT Networks

  • Youn, Joosang
    • Journal of the Korea Society of Computer and Information
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    • v.22 no.12
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    • pp.95-100
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    • 2017
  • In this paper, we propose a zone based ad hoc network construction scheme which support ad hoc path between nodes in local IoT networks consisting of IoT devices with the constrained feature, such as low power, the limited transmission rate and low computing capacity. Recently, the various routing protocols have been studied to support ad hoc networking of local IoT environments. This is, because basis RPL protocol is deigned to be used for the connecting service with Internet through gateway, ad hoc path between nodes in local IoT networks is not supported in basis RPL protocol. Thus, in this paper, the proposed routing scheme provides both ad hoc path and Infra path through gateway, supporting basis RPL protocol simultaneously. Through simulation, we show that the proposed routing scheme with zone based path selection scheme improves the performance of the success rate of end-to-end data transmission and the end-to-end delay, compared to basis RPL protocol.

Design and implementation of flooding-based query model in wireless sensor networks for indoor environmental monitoring system (실내환경 모니터링시스템을 위한 무선 센서네트워크에서의 플러딩 방식의 질의모델 설계 및 구현)

  • Lee, Seung-Chul;Jung, Sang-Joong;Lee, Young-Dong;Chung, Wan-Young
    • Journal of Sensor Science and Technology
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    • v.17 no.3
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    • pp.168-177
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    • 2008
  • An indoor environmental monitoring system using IEEE 802.15.4 based wireless sensor network is proposed to monitor the amount of pollutant entering to the room from outside and also the amount of pollutant that is generated in indoor by the building materials itself or human activities. Small-size, low-power wireless sensor node and low power electrochemical sensor board is designed to measure the condition of indoor environment in buildings such as home, offices, commercial premises and schools. In this paper, two query models, the broadcasting query protocol and flooding query protocol, were designed and programmed as a query-based routing protocol in wireless sensor network for an environment monitoring system. The flooding query routing protocol in environment monitoring is very effective as a power saving routing protocol and reliable data transmission between sensor nodes.

Security Model for Tree-based Routing in Wireless Sensor Networks: Structure and Evaluation

  • Almomani, Iman;Saadeh, Maha
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.6 no.4
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    • pp.1223-1247
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    • 2012
  • The need for securing Wireless Sensor Networks (WSNs) is essential especially in mission critical fields such as military and medical applications. Security techniques that are used to secure any network depend on the security requirements that should be achieved to protect the network from different types of attacks. Furthermore, the characteristics of wireless networks should be taken into consideration when applying security techniques to these networks. In this paper, energy efficient Security Model for Tree-based Routing protocols (SMTR) is proposed. In SMTR, different attacks that could face any tree-based routing protocol in WSNs are studied to design a security reference model that achieves authentication and data integrity using either Message Authentication Code (MAC) or Digital Signature (DS) techniques. The SMTR communication and processing costs are mathematically analyzed. Moreover, SMTR evaluation is performed by firstly, evaluating several MAC and DS techniques by applying them to tree-based routing protocol and assess their efficiency in terms of their power requirements. Secondly, the results of this assessment are utilized to evaluate SMTR phases in terms of energy saving, packet delivery success ratio and network life time.