• Title, Summary, Keyword: MAC protocol

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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.

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.

A Study on Asynchronous MAC Protocol with Dynamic Preamble Length in Wireless Sensor Networks (WSN에서 프리앰블 다이나믹을 이용한 비동기 MAC 프로토콜 연구)

  • Han, Hyeon-Ho;Hong, Yeong-Pyo;Lee, Sang-Hun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.9
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    • pp.3563-3570
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    • 2010
  • MAC protocol has been studied for reducing energy consumption in wireless sensor networks. The overhearing and idle In the existing asynchronous MAC Protocol will occur due to unnecessary energy consumption. In this paper, to solve these problems, the Preamble to change the structure of the destination address, the Preamble of the end times, the data including the length of the Preamble and Data Overhearing reduce the length of the Check Interval Data generated according to the presence of the Dynamic Value dynamically adjustable by changing the DPL (Dynamic Preamble Length)-MAC protocol was proposed. Moreover, the existing asynchronous MAC protocol of wireless sensor networks and DPL-MAC protocol proposed in this paper to simulate the energy consumption and latency were assessed in terms of comparative analysis.

An Energy and Delay Efficient Hybrid MAC Protocol for Multi-Hop Wireless Sensor Networks (멀티 홉 무선센서네트워크에서 에너지와 지연에 효율적인 하이브리드 MAC 프로토콜)

  • Jeon, Jun-Heon;Kim, Seong-Cheol
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.2
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    • pp.471-476
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    • 2015
  • In this paper, we propose an energy efficient hybrid MAC protocol for multi-hop wireless sensor networks. The proposed MAC protocol used a hybrid mechanism, in which contention-based MAC protocol and contention free MAC protocol are combined. The sensor nodes located far from the sink node usually send few data packet since they try to send measured data by themselves. So contention-based MAC protocol is useful among them. But other nodes located near sink node usually have lots of data packets since they plays as a relay node. Contention-based MAC protocol among them is not suitable. Using contention-based MAC protocol in heavy data traffic environment, packet collisions and transmission delay may increase. In this paper, slot assignment between sender nodes by sink node is used. The proposed mechanism is efficient in energy and latency. Results showed that our MAC protocol outperformed other protocol in terms of data packet delivery delay and energy consumption.

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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A Priority Based MAC Protocol for Emergency Data Transmission in Wireless Body Area Networks (WBAN 환경에서 응급 데이터 전송을 위한 우선순위 기반 MAC 프로토콜)

  • Lee, Hyeop-Geon;Lee, Kyoung-Hwa;Shin, Yong-Tae
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.4
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    • pp.26-33
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    • 2012
  • Please WBAN(Wireless Body Area Networks) is wireless communication of within 3 m radius from inside and outside of the body. WBAN is many uses IEEE 802.15.4 MAC protocol for WBAN MAC protocol requirements. IEEE 802.15.4 MAC protocol applies GTS(Guaranteed Time Slot) allocation scheme for guarantee packet delivery of application which requests QoS(Quality of Service). However, GTS allocation scheme of IEEE 802.15.4 MAC protocol uses FIFS(First In First Service) queueing. So it reduces data transmission reliability and has many problems. Therefore, IEEE 802.15.4 applies not WBAN MAC protocol for emergency data transmission. In this paper, we proposes a priority based MAC protocol for emergency data transmission in wireless body area networks. the proposal MAC protocol sets priority the data. So GTS reqeuest throughput of emergency data increasing and GTS allocation delay of emergency data decreasing.

Design of Receiver-Initiated Asynchronous MAC Protocol for Energy-Efficiency in WSNs (전력 효율을 위한 수신자 기반 비동기 센서 MAC 프로토콜 설계)

  • Park, In-Hye;Lee, Hyung-Keun
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39B no.12
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    • pp.873-875
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    • 2014
  • In this paper we describe an asynchronous MAC protocol with receiver-initiated duty cycling for energy-efficiency in wireless sensor networks(WSN). Legacy asynchronous MAC protocols, X-MAC and PW-MAC, has weaknesses which generates too many control packets and has data collision problem between multiple transmitters, respectively. Therefore, we propose a receiver-initiated asynchronous MAC protocol which generates control packets from transmitter to complement these disadvantages. Compared to the prior asynchronous duty cycling approaches of X-MAC and PW-MAC, the proposed protocol shows a improvement in energy-efficiency, throughput and latency from simulation results.

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.

Design and Validation of MAC Protocol for B-WLL System (B-WLL 시스템 MAC 프로토콜의 설계 및 검증)

  • Back, Seung-Kwon;Kim, Eung-Bae;Han, Ki-Jun
    • Journal of KIISE:Computing Practices and Letters
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    • v.8 no.4
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    • pp.468-478
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    • 2002
  • In this paper, we designed a B-WLL MAC(Media Access Control) protocol and validated its operation for implementation of high-speed subscriber networks. Our MAC protocol was designed by SDL using the DAVIC specifications based upon the variable contention/reserved time slot allocation algorithm. For validation of our MAC protocol, Syntax and semantic error check were performed by the Simulation Builder of ObjectGeode and the MAC(Message Sequence Chart) respectively. The validation results showed that our B-WLL MAC protocol is working correctly and may successfully support B-WLL services.

Low Power MAC Protocol Design of an Efficient Preamble Exploiting Virtual Synchronization Scheme for Wireless Sensor Networks (무선 센서 네트워크를 위한 효율적인 프리앰블 가상 동기화 기법을 사용하는 저전력 MAC 프로토콜 설계)

  • Lee, Sung-Hun;Hwang, Se-Wook;Lee, Hyuk-Joon;Lee, Hyung-Geun
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.5B
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    • pp.762-770
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    • 2010
  • The researches about energy efficieny of wireless sensor MAC protocol is an issue in present days. Therefore, MAC and routing protocols for reducing energy consumption at sensor nodes is needed. In this study, a low-power MAC protocol for sensor network is proposed, which in based on X-MAC by exploiting virtual synchronization. The virtual synchronization technique lets senders postpone packet transmission until receivers' wake-up time, so that senders transmit only one or two short preambles. Using NS-2, a proposed MAC protocol improve the energy efficiency by 10% compared with the X-MAC protocol.