• Title, Summary, Keyword: MAC

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Improved Sensor MAC Protocol for Wireless Sensor Network (무선 센서 네트워크를 위한 향상된 센서 MAC 프로토콜)

  • Lee, Ju-a;Kim, Jae-Hyun;Min, Seung-Wook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.11A
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    • pp.1138-1146
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    • 2006
  • It is very important for the sensor network to save battery capacity. Switching active mode to sleep mode is used for S-MAC protocol and expiring timer before end of the active part is used for T-MAC in order to extend battery life span. We proposed IS-MAC (Improved Sensor MAC) which gives more energy efficiency than S-MAC and T-MAC To improve energy efficiency in sensor network, we used the threshold value in buffer to transmit data packet and proposed the method to reduce the number of control packets which cause extra battery consumption. Based on the analytical results, we found that the proposed IS-MAC protocol shows better performance than conventional MAC protocols.

Performance Evaluation of MAC Protocols with Application to MANET Routing for Distributed Cognitive Radio Networks (분산 무선 인지 네트워크를 위한 MAC 프로토콜의 MANET 라우팅 적용 성능 분석)

  • Kwon, Sehoon;Kim, Hakwon;Kim, Bosung;Roh, Byeong-Hee
    • KIPS Transactions on Computer and Communication Systems
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    • v.3 no.4
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    • pp.97-106
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    • 2014
  • In this paper, we propose a design method to extend certain cognitive radio (CR) MAC protocols originally proposed only for the one hop applications in distributed CR networks to MANET routing protocols. Among several CR MAC protocols, the opportunistic MAC (called O-MAC) and the opportunistic period MAC (called OP-MAC) are considered, and AODV as MANET routing protocol is used. We implement the protocols using OPNET network simulator, and compare the performances in both MAC and AODV routing environments. With the experiments, we analyze the relationship between MAC and routing performances of the CR protocols.

MAC Address Spoofing Attack Detection and Prevention Mechanism with Access Point based IEEE 802.11 Wireless Network (Access Point 기반 무선 네트워크 환경에서의 MAC Address Spoofing 공격 탐지 및 차단 기법)

  • Jo, Je-Gyeong;Lee, Hyung-Woo
    • Journal of Internet Computing and Services
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    • v.9 no.4
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    • pp.85-96
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    • 2008
  • An authentication procedure on wired and wireless network will be done based on the registration and management process storing both the user's IP address and client device's MAC address information. However, existent MAC address registration/administration mechanisms were weak in MAC Spoofing attack as the attacker can change his/her own MAC address to client's MAC address. Therefore, an advanced mechanism should be proposed to protect the MAC address spoofing attack. But, existing techniques sequentially compare a sequence number on packet with previous one to distinguish the alteration and modification of MAC address. However, they are not sufficient to actively detect and protect the wireless MAC spoofing attack. In this paper, both AirSensor and AP are used in wireless network for collecting the MAC address on wireless packets. And then proposed module is used for detecting and protecting MAC spoofing attack in real time based on MAC Address Lookup table. The proposed mechanism provides enhanced detection/protection performance and it also provides a real time correspondence mechanism on wireless MAC spoofing attack with minimum delay.

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Energy Efficient Dynamic S-MAC Protocol for Sensor Networks (센서 네트워크에서 에너지 효율적인 동적 S-MAC 프로토콜)

  • Yoo, Dae-Suk;Choi, Seung-Sik
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.7B
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    • pp.502-509
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    • 2008
  • Wireless sensor networks consist of sensor nodes which are expected to be battery-powered and hard to replace or recharge. Thus, reducing the energy consumption of sensor nodes is an important design consideration in wireless sensor networks. For the implementation of energy-efficient MAC protocol, Sensor-MAC based on IEEE 802.11 protocol. In this paper, which has energy efficient scheduling, was proposed. In this paper, we propose Dynamic S-MAC that is dynamically operated by network-traffic states. Dynamic S-MAC protocol improves energy consumption of S-MAC due to change the frame length according to network-traffic states. Using NS-2 Simulation, we compare the performance of Dynamic S-MAC with S-MAC protocol.

Performance Evaluation of X-MAC/BEB Protocol for Wireless Sensor Networks

  • Ullah, Ayaz;Ahn, Jong-Suk
    • Journal of Communications and Networks
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    • v.18 no.5
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    • pp.857-869
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    • 2016
  • This paper proposes an X-MAC/BEB protocol that runs a binary exponential backoff (BEB) algorithm on top of an X-MAC protocol to save more energy by reducing collision, especially in densely populated wireless sensor networks (WSNs). X-MAC, a lightweight asynchronous duty cycle medium access control (MAC) protocol, was introduced for spending less energy than its predecessor, B-MAC. One of X-MAC 's conspicuous technique is a mechanism to allow senders to promptly send their data when their receivers wake up. X-MAC, however, has no mechanism to deal with sudden traffic fluctuations that often occur whenever closely located nodes simultaneously diffuse their sense data. To precisely evaluate the impact of the BEB algorithm on X-MAC, this paper builds an analytical model of X-MAC/BEB that integrates the BEB model with the X-MAC model. The analytical and simulation results confirmed that X-MAC/BEB outperformed X-MAC in terms of throughput, delay, and energy consumption, especially in congested WSNs.

MAC Layer Protocol for Improvement in Power Consumption and Time Delay in a Sensor Network (센서 네트워크에서 전력소모와 지연시간 개선을 위한 MAC 계층 프로토콜 연구)

  • Shin, Jae Kwan;Park, Dong Chan;Kim, Suk Chan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.2
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    • pp.366-368
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    • 2015
  • This paper proposes a MAC protocol for sensor networks such as disaster detection system which generate the non-periodic packet. B-MAC has been used to solve delay problem for sensor networks, however, the power loss occurs due to excessive preamble and over-hearing. In contrast, S-MAC has a number of drawbacks in power consumption due to synchronization. In this paper, we propose H-MAC and analyze its performance which has improved power consumption compared to S-MAC and overhead and over-hearing compared to B-MAC.

The Acquisition Methodology Study of User Trace Data in Mac OS X (Mac OS X 운영체제상의 사용자 흔적정보 수집방안 연구)

  • Choi, Joon-Ho;Lee, Sang-Jin
    • The KIPS Transactions:PartC
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    • v.17C no.4
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    • pp.335-346
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    • 2010
  • Mac OS X is the Computer Operating System that develop in Apple Inc. Mac OS X is the successor to Mac OS 9 Version which had been Apple's primary operating system since 1984. Recently, Mac OS X 10.6 (Snow Leopard) has been manufactured and is distributed to user. Apple's Mac OS X Operating System is occupying about 10% in the world Operating System market share. But, Forensic tools that is utilized on digital forensic investigation can not forensic analysis about Mac OS X properly. To do forensic investigation about Mac OS X, information connected with user's action and trace can become important digital evidence in Operating System. This paper presents way about user trace data acquisition methodology in Mac OS X.

An Energy-Efficient Asynchronous Sensor MAC Protocol Design for Wireless Sensor Networks (무선 센서 네트워크를 위한 에너지 효율적인 비동기 방식의 센서 MAC 프로토콜 설계)

  • Park, In-Hye;Lee, Hyung-Keun;Kang, Seok-Joong
    • Journal of IKEEE
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    • v.16 no.2
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    • pp.86-94
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    • 2012
  • Synchronization MAC Protocol such as S-MAC and T-MAC utilize duty cycling technique which peroidically operate wake-up and sleep state for reducing energy consumption. But synchronization MAC showed low energy efficiency because of additional control packets. For better energy consumption, Asychronization MAC protocols are suggested. For example, B-MAC, and X-MAC protocol adopt Low Power Listening (LPL) technique with CSMA algorithm. All nodes in these protocols joining a network with independent duty cycle schedules without additional synchronization control packets. For this reason, asynchronous MAC protocol improve energy efficiency. In this study, a low-power MAC protocol which is based on X-MAC protocol for wireless sensor network is proposed for better energy efficiency. For this protocol, we suggest preamble numbering, and virtual-synchronization technique between sender and receive node. Using TelosB mote for evaluate energy efficiency.

Bio-MAC: Optimal MAC Protocol for Various Bio-signal Transmission in the WBSN Environment (Bio-MAC: WBSN환경에서 다양한 생체신호 전송을 위한 최적화된 MAC Protocol)

  • Jang, Bong-Mun;Ro, Young-Sin;Yoo, Sun-Kook
    • Proceedings of the KIEE Conference
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    • pp.423-425
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    • 2007
  • In this paper, Medium Access Control(MAC) protocol designed for Wireless Body area Sensor Network(Bio-MAC) is proposed, Because in WBSN, the number of node is limited and each node has different characteristics. Also, reliability in transmitting vital data sensed at each node and periodic transmission should be considered so that general MAC protocol cannot satisfy such requirements of biomedical sensors in WBSN. Bio-MAC aims at optimal MAC protocol in WBSN. For this, Bio-MAC used Pattern -SuperFrame, which modified IEE E 802.15.4-based SuperFrame structurely. Bio-MAC based on TDMA uses Medium Access-priority and Pattern eXchange -Beacon method for dynamic slot allocation by considering critical sensing data or power consumption level of sensor no de etc. Also, because of the least delay time. Bio-MAC is suitable in the periodic transmission of vital signal data. The simulation results demonstrate that a efficient performance in WBSN can be achieved through the proposed Bio-MAC.

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Analysis of the S-MAC/T-MAC Protocol for Wireless Sensor Networks (무선 센서망의 에너지 효율적 MAC(S-MAC/T-MAC) 성능 분석)

  • Lee Woo-Chul;Lee Yoo-Tae;Kim Dong-Il
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.99-103
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    • 2006
  • In this paper, we focus on the problem of designing an energy efficient MAC protocol for wireless sensor networks and analyze S(Sensor)-MAC and T(Time-out)-MAC. S-MAC is based on the concept of the 'listen/sleep mode cycle'. This applies message passing to reduce contention latency for sensor-network applications that require store-and-forward processing as data moves through the network. However unlike the S-MAC, where the duration of the cycle is fixed, T-MAC introduces an adaptive duty cycle in a novel way: by dynamical ending the active part of it. This reduces the amount of energy wasted on idle listening, in which nodes wait for potentially incoming messages while still maintaining a reasonable throughput. In this paper we discuss the design of these two Protocols. We analyze them from the aspect of latency, throughput, and power savings when using the OMNeT++ simulator in various environments.

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