• Title, Summary, Keyword: Superframe

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Hierarchical superframe formation algorithm in 802.15.3 network (네트워크에서 계층적 슈퍼프레임 알고리듬을 통한 대역폭의 효율적인 활용)

  • Youn Kyu Jung;June Sun Do;Lee Jang Yeon;Lee Hyeon Seok;Won Yun Jae;Kwon Tai Gil;Torok Attila;Vajda Lorant
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.10B
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    • pp.849-856
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    • 2004
  • This paper proposes a novel superframe formation algorithm for wireless systems with time-slotted superframe structure. The design objective of the proposed algorithm is to provide high performance, stability, error tolerance, as well as power-saving features. The paper presents a comprehensive performance analysis of the Proposed superframe formation algorithm with different types of traffic applied. During analysis several performance metrics are investigated. The error tolerance to beacon loss and the behavior of CBR flows are also studied. We show that the proposed algorithm inherits the advantages of the previously used algorithms, while providing additional features.

Design of the Protocol for Wireless Charging of Mobile Emotional Sensing Device (모바일 감성 센싱 단말기의 무선 충전을 위한 프로토콜 설계 및 구현)

  • Kim, Sun-Hee;Lim, Yong-Seok;Lim, Seung-Ok
    • IEMEK Journal of Embedded Systems and Applications
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    • v.7 no.2
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    • pp.95-101
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    • 2012
  • In order to supply emotion service depending on user's emotional change in a mobile environment, various researches have been carried. This paper discusses a protocol for wireless charging and an embedded platform of the mobile emotional sensing device which supports that. Wireless charging process relieves user's vexatious task to charge the emotional sensing device. To support wireless charging, there are one basestation and several mobile devices. Basestation coordinates and controls the devices over wireless communication, as well as supplies energy. For 1:N communication we defines the network whose superframe is classified into four categories: a network join superframe, a charging request superframe, a charging superframe and an inactive superframe. Physical layer provides how to supply energy to the devices and communicate physically. Mobile device is equipped with energy charged circuits, which correspond with the defined energy supplying method, as well as bidirectional communication circuits. Mobile device monitors and analyzes its own battery status, and is able to send a request packet to basestation. Therefore, it can be charged before its battery is exhausted without user's perception.

Optimal Design of Superframe Pattern for DVB-RCS Return Link

  • Lee, Ki-Dong;Cho, Yong-Hoon;Lee, Seung-Joon;Lee, Ho-Jin
    • ETRI Journal
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    • v.24 no.3
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    • pp.251-254
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    • 2002
  • We developed a method for optimal superframe design in the multi-frequency time division multiple access (MF-TDMA) return-link of a satellite multimedia interactive network called a digital video broadcasting return channel over satellite (DVB-RCS) sub-network. To find the optimal superframe pattern with the maximum data throughput, we formulated the design problem as a non-linear combinatorial optimization problem. We also devised the proposed simple method so that it would have field applicability for improving radio resource utilization in the MF-TDMA return link.

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Implementation of TDMA based superframe network using IEEE 802.15.4 MAC/PHY (IEEE 802.15.4 MAC/PHY를 이용한 TDMA 기반 Superframe 네트워크 구현)

  • Oh, Suk-Ho;Kim, Kang-Myo;Jung, Ha-Yeon;Kim, Ki-Hyung;Yoo, Seung-Wha
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.756-759
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    • 2011
  • 산업장 기반 모니터링 시스템에 무선 네트워크 기술의 도입은 시스템 도입 및 유지보수에 있어 반드시 필요하다. 무선 네트워크 기반의 산업장 모니터링을 위해 현재 USN 네트워크에서 광범위하게 사용되고 있는 IEEE 802.15.4 하드웨어 및 MAC 을 이용하여 Freequency Hopping을 수행하는 Superframe 기반의 TDMA 기술을 구현하였다.

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An Adaptive Superframe Duration Allocation Algorithm for Resource-Efficient Beacon Scheduling

  • Jeon, Young-Ae;Choi, Sang-Sung;Kim, Dae-Young;Hwang, Kwang-il
    • Journal of Information Processing Systems
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    • v.11 no.2
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    • pp.295-309
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    • 2015
  • Beacon scheduling is considered to be one of the most significant challenges for energy-efficient Low-Rate Wireless Personal Area Network (LR-WPAN) multi-hop networks. The emerging new standard, IEEE802.15.4e, contains a distributed beacon scheduling functionality that utilizes a specific bitmap and multi-superframe structure. However, this new standard does not provide a critical recipe for superframe duration (SD) allocation in beacon scheduling. Therefore, in this paper, we first introduce three different SD allocation approaches, LSB first, MSB first, and random. Via experiments we show that IEEE802.15.4e DSME beacon scheduling performs differently for different SD allocation schemes. Based on our experimental results we propose an adaptive SD allocation (ASDA) algorithm. It utilizes a single indicator, a distributed neighboring slot incrementer (DNSI). The experimental results demonstrate that the ASDA has a superior performance over other methods from the viewpoint of resource efficiency.

Impact analysis of superframe order on the performance of IEEE 802.15.4 slotted CSMA/CA (IEEE 802.15.4의 Superframe Order에 따른 성능 영향 분석)

  • Jeon, Joseph;Ha, Jae-Yeol;Lee, Jong-Wook;Kwon, Wook-Hyun
    • Proceedings of the IEEK Conference
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    • pp.47-48
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    • 2006
  • In this paper, we analyze the impact of superframe order on the performance of the IEEE 802.15.4 slotted CSMA/CA. A new analytic model to evaluate the saturation throughput is proposed. The new model describes slot time behaviors of the IEEE 802.15.4 slotted CSMA/CA. The proposed model is validated via the comparison with ns-2 simulation results.

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Sampling time-based Adaptive Beacon Interval and Superframe Duration Control in IEEE 802.15.4 (IEEE 802.15.4에 있어서 샘플링 주기를 이용한 비콘 구간 및 슈퍼프레임 구간의 적응적 제어방법)

  • Kim, Jeong-Ah;Jeon, Yeong-Ho;Park, Hong-Seong
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.1A
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    • pp.75-82
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    • 2007
  • This paper proposes the way that reduces power consumption of the IEEE 802.15.4-based sensor network. To reduce power consumption, we consider following two schemes; first scheme is the Adaptive Beacon Interval Control. The next is the Adaptive Superframe Duration Control. Our results show that these guarantee reducing power consumption in ns-2 simulator.

Wireless Fieldbus for Networked Control Systems using LR-WPAN

  • Choi, Dong-Hyuk;Kim, Dong-Sung
    • International Journal of Control, Automation, and Systems
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    • v.6 no.1
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    • pp.119-125
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    • 2008
  • This paper examines the use of a wireless Fieldbus based on IEEE 802.15.4 MAC protocol. The superframe of IEEE 802.15.4 is applied to a transmission scheme of real-time mixed data. The transmission and bandwidth allocation scheme are proposed for real-time communication using a superframe. The proposed wireless Fieldbus protocol is able to transmit three types of data (periodic data, sporadic data, and non real-time messages), and guarantee realtime transmission simultaneously within a limited timeframe.

An Adaptive GTS Allocation Scheme to Increase Bandwidth Utilization in IEEE 802.15.4 (IEEE 802.15.4에서 대역폭 사용 효율 향상을 위한 적응적 GTS 할당 기법)

  • Park, Hee-Dong;Kim, Do-Hyeon;Park, Hyeon
    • Journal of Korea Multimedia Society
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    • v.14 no.2
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    • pp.219-227
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    • 2011
  • The superframe structure of IEEE 802.15.4, an international standard for low rate WPAN, is composed of CAP(Contention access period) and CFP(Contention free period). CAP is the contention-based access period, while CFP is contention-free access period for supporting QoS by allocating fixed bandwidth. The standard can support QoS for only a few devices, because the maximum number of GTSs is 7. Furthermore, as the value of BO (Beacon order) or SO (Superframe order) increases, the size of a time slot increases. This makes it difficult to precisely allocate bandwidth for any device, because the bandwidth is allocated by the unit of GTS. The proposed scheme of this paper can reduce the waste of BW in CFP by adaptively reducing the size of a time slot in CFP as the value of BO or SO increases and increase the number of GTSs to 127 by modifying the standard. The performance analysis shows that the proposed scheme can dramatically increase the bandwidth utilization during the CFP when comparing with IEEE 802.15.4.

Design of Scheduling Superframe based on IEEE 802.15.4 MAC using LQI (LQI를 이용한 IEEE 802.15.4 MAC 기반의 스케줄링 슈퍼프레임 설계)

  • Chon, Young-Jo;Lin, Chi-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.16 no.6
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    • pp.159-164
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    • 2016
  • This paper proposes an improved superframe structure with one : N situation of the network as a target for efficiency battery and communication performance used in the existing standard IEEE 702.15.4 MAC layer. The proposed superframe transforms and adds a two structures. First, we add the proposed scheduling interval after the arrival of the beacon. Second, we change to a structure in which one of the contention access period is divided into two. The contention access period and the contention-free access period of active portion are divided according to the LQI value of the device. Through this system-level simulation written by $c{^+^+}$, as a results show that the battery consumption and transmission performance has been increased.