Journal ArticleDOI
Throughput and delay limits of chirp spread spectrum-based IEEE 802.15.4a
TLDR
This work analyzed the theoretical throughput and delay bounds of the unslotted version of chirp spread spectrum PHY‐based 802.15.4a, and compared its results with IEEE 802.16.4.Abstract:
The IEEE 802.15.4 standard is designed to provide a low-power, low data rate protocol offering a high reliability. As an amendment to this standard, IEEE 802.15.4a introduces new options for physical layer to enable precision ranging. In this work, we analyzed the theoretical throughput and delay bounds of the unslotted version of chirp spread spectrum PHY-based 802.15.4a. The formulae for transmission between one sender and one receiver for an ideal channel with no transmission errors are given. The throughput and delay bounds are derived for different frequency bands and data rates. Additionally, to measure spectral utilization, we measured the bandwidth efficiency for both the standards. We also compared our results with IEEE 802.15.4. The comparative analysis concludes that the performance of 802.15.4a exceeds 802.15.4 in terms of throughput and delay. The analytical results of throughput are verified by computer simulations. Copyright © 2011 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Performance evaluation of IEEE 802.15.4 sensor networks in industrial applications
TL;DR: The main contributions of this paper are the comprehensive studies of both beacon‐enabled and nonbeacon‐enabled modes under various parameter settings and the beacon tracking synchronization mechanism in the IEEE 802.15.4 standard, which is ignored in most previous works.
Journal ArticleDOI
A new anti-collision algorithm for RFID tag
TL;DR: In this new algorithm, tag uses a binary pulse string to transfer data to the reader, compared with the traditional query tree‐based algorithms, which is based on the tag's ID;This new algorithm is more efficient and requires fewer read cycles for tag's identification.
Journal ArticleDOI
Simplified gateway selection scheme for multihop relay in vehicular ad hoc network
TL;DR: A new simplified gateway selection (SGS) scheme for multihop relay in a VANET‐UMTS integration network is proposed and outperforms other cluster‐based gateway selections scheme in terms of selection delay, control packet overhead, packet delivery ratio, and overall throughput.
Journal ArticleDOI
A real‐time noise resilient data link layer mechanism for unslotted IEEE 802.15.4 networks
TL;DR: The proposed stochastic model seems to be suitable in mobile environments by achieving high data‐transfer rate for unslotted IEEE 802.15.4 transmissions.
Book ChapterDOI
Radio resource management for heterogeneous wireless networks: Schemes and simulation analysis
TL;DR: In this article, the authors provide an investigation of several scheduling and call admission control (CAC) schemes for wireless systems, including transmission power management, preventive and reactive congestion control, and scheduling of radio resources.
References
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Performance of ultra-wideband communications with suboptimal receivers in multipath channels
J.D. Choi,Wayne E. Stark +1 more
TL;DR: The performance of a single-user ultra-wideband communication system employing binary block-coded pulse-position modulation and suboptimal receivers in multipath channels is considered and numerical results for several cases are obtained which illustrate the tradeoff between performance and receiver complexity.
Journal ArticleDOI
Home networking with IEEE 802.15.4: a developing standard for low-rate wireless personal area networks
TL;DR: The main features of the standard are network flexibility, low cost, and low power consumption; the standard is suitable for many applications in the home requiring low-data-rate communications in an ad hoc self-organizing network.
Journal ArticleDOI
IEEE 802.15.4: a developing standard for low-power low-cost wireless personal area networks
TL;DR: The technical considerations and system requirements necessary when implementing a low-cost low-power wireless personal area network are discussed and an overview of the unique applications such a technology will enable are provided.
Journal ArticleDOI
Throughput and delay limits of IEEE 802.11
Yang Xiao,J. Rosdahl +1 more
TL;DR: It is shown that a theoretical throughput upper limit and a theoretical delay lower limit exist for the IEEE 802.11 protocols, indicating that by simply increasing the data rate without reducing overhead, the enhanced performance is bounded even when the data rates goes into infinitely high.
Proceedings ArticleDOI
Theoretical maximum throughput of IEEE 802.11 and its applications
TL;DR: The goal of this paper is to present exact formulae for the throughput of IEEE 802.11 networks in the absence of transmission errors and for various physical layers, data rates and packet sizes.