Ara Cho, Changho Yun, Jong-won Park, Yong-Kon Lim,
... Block Time Bounded Time Division Multiple Access (BTB-TDMA) medium access control (MAC) protocol is proposed for ... UNs) in underwater acoustic networks (UANets). The BTB-TDMA determines transmission schedule of UNs based on UNs' ... analyze the protocol's performance, we divide BTB-TDMA into two cases, BTB-TDMA considering EPDs (BTB-TDMA1) and BTB-TDMA without considering EPDs (BTB-TDMA2), to show how ... of STUMP (Kredo II et al., 2009) and TDMA, and compare them with those of BTB-TDMA. The numerical analysis shows that BTB-TDMA1 can ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2011 - Elsevier BV | Ocean Engineering
... communications. This article proposes ad-hoc self-organizing TDMA (ASO-TDMA), a medium access control (MAC) protocol targeting SANETs. Frames in ASO-TDMA are divided into several sub-frames, and based ... transfers through their available sub-frames. Accordingly, ASO-TDMA provides better performance in terms of reducing receiver ... from hidden terminal problems compared to self-organizing TDMA (SO-TDMA) and carrier-sensing TDMA (CS-TDMA), two existing MAC protocols for maritime VHF communications. ...
Tópico(s): Satellite Communication Systems
2012 - Springer Nature | EURASIP Journal on Wireless Communications and Networking
Zedong Nie, Li Zhao, Renwei Huang, Yuhang Liu, Jingzhen Li, Lei Wang,
... cope with aforementioned challenges, a statistical frame based TDMA (S-TDMA) protocol with multi-constrained (energy, delay, transmission efficiency ... low delay is handled in our proposed S-TDMA. A beacon frame with the contained synchronous and ... the hardware platform. To verify its feasibility, S-TDMA was fully implemented on our independently-developed HBC ... a human body. Experiment results show that S-TDMA costs 89.397 mJ every 20 s when ... MAC (LMAC); the average data latency of S-TDMA is 6.3 ms, 7.02% lower than ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2015 - BioMed Central | BioMedical Engineering OnLine
... link layer. To this end, Geometric Spatial Reuse-TDMA (GSR-TDMA), a new TDMA-based MAC protocol, is designed for use in ... RSR) and the multihop delay (MHD) of GSR-TDMA, and the results are compared to those of previous approaches, including C-MAC and HSR-TDMA. GSR-TDMA outperforms C-MAC; the RSR of GSR-TDMA is 15% higher than that of C-MAC, and the MHD of GSR-TDMA is 30% lower than that of C-MAC at the most. In addition, GSR-TDMA provides even better performance improvements over HSR-TDMA; ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2016 - Hindawi Publishing Corporation | Journal of Sensors
... be two variants of time division multiple access (TDMA), viz., receiver synchronized TDMA and transmitter synchronized TDMA. In receiver synchronized TDMA (RS-TDMA), the transmitter transmits according to the receiver's time slot and in transmitter synchronized TDMA (TS-TDMA), the transmitter transmits according to the transmitter's time slot. In this paper, we study RS-TDMA and TS-TDMA in the presence of distance dependent propagation delay ...
Tópico(s): Mobile Ad Hoc Networks
2017 - Elsevier BV | Journal of Network and Computer Applications
Nabeel A. Riza, Mohsin A. Mazhar,
... imaging, which include the time division multiple access (TDMA) mode, the code division multiple access (CDMA) mode, the CDMA-TDMA mode, the frequency division multiple access (FDMA)-TDMA mode, the frequency modulation (FM)-CDMA-TDMA mode, FM-TDMA mode, and the FDMA-CDMA-TDMA mode. Engagement of FDMA and CDMA modes enables ... to-noise ratio photo detection, while use of TDMA prevents optical point detector saturation. The use of ... 90 dB, and 94.9 dB for the TDMA, CDMA, FM-CDMA-TDMA, and FM-TDMA modes, respectively. The FM-TDMA ...
Tópico(s): Laser Design and Applications
2018 - Optica Publishing Group | Applied Optics
Maryam Zebarjadi, Mehdi Teimouri,
... Non-cooperative burst detection and synchronisation in downlink TDMA-based wireless communication networks Maryam Zebarjadi, Maryam Zebarjadi ... special case of downlink time division multiple access (TDMA) burst transmission, performances of these detection methods are ... and second when a time division multiple access (TDMA) scheme is implemented (e.g. in GSM standard [ ... been done on design of a receiver for TDMA signals in a cooperative environment. For example, the ... investigated in [31]; frame and burst acquisition in TDMA satellite communication networks via unique word pattern is ...
Tópico(s): Distributed Sensor Networks and Detection Algorithms
2019 - Institution of Engineering and Technology | IET Communications
Dalal Asker, Teruhiko Beppu, Kenji Uéda,
... Gram-negative, motile, strictly aerobic, pleomorphic bacterium (strain TDMA-16 T ) was isolated from a freshwater sample collected at Misasa (Tottori, Japan). Strain TDMA-16 T was slightly tolerant to gamma-ray ... 1 ]. The DNA G+C content of strain TDMA-16 T was 63.3 mol%. Phylogenetic analysis based on 16S rRNA gene sequences placed strain TDMA-16 T in a distinct lineage in the family Sphingomonadaceae ; sequence data showed that strain TDMA-16 T was most closely related to Sphingomonas ... 94.5 %). The major fatty acids of strain TDMA-16 T were C 17 : 1 ω 6 ...
Tópico(s): Plant and Fungal Species Descriptions
2007 - Microbiology Society | INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Milica D. Jovanović, Goran T. Djordjević,
SUMMARY Time‐division multiple‐access (TDMA) is a common medium access control paradigm in wireless sensor networks. However, in its traditional form, the TDMA‐based protocols suffer from low channel utilization and ... and the energy efficiency of a class of TDMA‐based protocols, called reduced‐frame TDMA, where every TDMA slot is augmented with a short time period ... caused by conflicting slot assignments, the reduced‐frame TDMA protocols can be configured with any frame length, ... The simulation results indicate that the reduced‐frame TDMA protocols significantly reduce the message delay and increase ...
Tópico(s): Wireless Networks and Protocols
2012 - Wiley | International Journal of Communication Systems
Jing Ju, Yoshinori Yamamoto, Yulong Wang, Yuhua Shan, Guichun Dong, Akira Miyazaki, Tetsushi Yoshida,
... tended to show greater total dry matter accumulation (TDMA) and higher harvest index (HI), while increasing TDMA resulted in a decrease in HI. The contribution ratio of the TDMA to grain yield (2000 : 67.3%, 2001 : 68. ... level, there was a significant difference in the TDMA and HI values. In both years, the contribution ... of NUEd and total nitrogen absorption (NTA) to TDMA were about 62.0 and 38.0%, respectively. ... the high-yielding rice plants generally displayed high TDMA and HI values. Further increase in rice grain ...
Tópico(s): Plant responses to water stress
2009 - Taylor & Francis | Plant Production Science
G. Pierobon, Andréa Zanella, A. Salloum,
... known, as contention time-division multiple access (C-TDMA), is presented and analyzed in a radio cellular multiuser system scenario. C-TDMA shows some features of contention-based (slotted-ALOHA) ... simple Markov model is proposed to describe C-TDMA behavior. A complete statistical analysis of the model ... basis of the EPA analysis and the C-TDMA design parameters, a fast algorithm has been developed to improve the achievable throughput of C-TDMA. Results in terms of throughput and delay under variable traffic conditions indicate that C-TDMA is able to grant optimum throughput/delay figures ...
Tópico(s): Wireless Communication Networks Research
2002 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
Nansai Hu, Yudong Yao, Zhuo Yang,
The time-division-multiple-access-based (TDMA) protocol has been widely utilized as a reliable media access control (MAC) mechanism. By allocating each user a dedicated time slot, a given TDMA user transmits its packets in its exclusively assigned ... not transmitting). However, in this paper, a cooperative TDMA (C-TDMA) method is investigated, which enables cooperative transmissions among multiple TDMA users to improve the probability of success of packet transmissions. Specifically, a TDMA user not only transmits packets in its assigned ...
Tópico(s): Wireless Networks and Protocols
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
Shivam Garg, Venu Sri Sushma Kuchipudi, Elizabeth Serena Bentley, Sunil Kumar,
Time division multiple access (TDMA) based medium access control (MAC) schemes are widely used for communication among directional nodes since they can provide a conflict-free transmission schedule.However, the existing directional TDMA schemes introduce significant overhead and delay, and cannot ... this paper, a novel, real-time, distributed, directional TDMA scheme is presented for directional multi-hop wireless ... Simulation results and comparisons with other recent, distributed TDMA-based schemes show that our scheme provides a ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2021 - Institute of Electrical and Electronics Engineers | IEEE Access
Irfan Jabandžić, Spilios Giannoulis, Ruben Mennes, Felipe A. P. de Figueiredo, Maxim Claeys, Ingrid Moerman,
... deterministic ad hoc networks, Time-Division Multiple Access (TDMA) is a popular medium access scheme, with many distributed TDMA scheduling algorithms being proposed. However, with increasing traffic ... paper, we propose a dynamic distributed multi-channel TDMA (DDMC-TDMA) slot management protocol based on control messages exchanged ... removal procedures between sender and receiver nodes. DDMC-TDMA is a topology-agnostic slot management protocol suitable ... density ad hoc networks. The performance of DDMC-TDMA has been evaluated for various topologies and scenarios ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2021 - Institute of Electrical and Electronics Engineers | IEEE Access
P. Villani, David Picard, V. Michaud, Paolo Laj, Alfred Wiedensohler,
... by humidity tandem differential mobility analyzing techniques (H-TDMA). In this article, we present a new development ... named Volatility Hygroscopic—Tandem Differential Mobility Analyzer (VH-TDMA), is to allow for rapid (10 minutes) series ... of both thermal and RH conditioning. The VH-TDMA is, therefore, suited to investigate particle ageing through a simple coupling of H-TDMA and V-TDMA performances. The aim of the present article is ... to natural aerosols, we show that the VH-TDMA system can be used to investigate the hygroscopic ...
Tópico(s): Air Quality and Health Impacts
2008 - Taylor & Francis | Aerosol Science and Technology
Andreas Maßling, N. Niedermeier, T. Hennig, Erik Fors, Erik Swietlicki, Mikael Ehn, Kaarle Hämeri, P. Villani, Paolo Laj, Nicholas Good, G. McFiggans, Alfred Wiedensohler,
... custom-built Hygrocopicity-Tandem Differential Mobility Analyser (H-TDMA) systems was investigated in the frame of an ... goal of the workshop was to harmonise H-TDMA measurements and develop recommendations for atmospheric measurements and their data evaluation. The H-TDMA systems were compared in terms of the sizing ... sizing of dry particles of the six H-TDMA systems was within 0.2 to 4.2% ... different data evaluation procedures used for each H-TDMA. The differences between the H-TDMAs were reduced ... mixed aerosols will improve the comparability of H-TDMA measurements. It is recommended to ensure proper calibration ...
Tópico(s): Air Quality and Health Impacts
2011 - Copernicus Publications | Atmospheric measurement techniques
Using time division multiple access (TDMA) scheme to access the shared medium in communication systems has been well studied in literature. The major problems of TDMA system are how to efficiently schedule the time ... varied amount of traffic by time. Recently many TDMA schemes had been proposed such as the topology-unaware TDMA method, which uses the probabilistic method to access medium, to enhance the performance of TDMA system. However, this method would lead to heavy ... To tackle this drawback, we propose a stealing-TDMA (sTDMA) protocol using ACK mechanism to reserve time ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2006 - Institute of Electrical and Electronics Engineers | IEEE Vehicular Technology Conference
Suzhi Bi, Ying–Jun Angela Zhang,
... user-level fairness. At the other extreme, fixed TDMA scheduling achieves the fairest airtime allocation but the ... less antennas than the base station, even fixed TDMA achieves the optimal diversity gain that is otherwise ... addition, by incorporating very limited opportunism, a simple TDMA-based scheme, named relaxed-TDMA, asymptotically achieves the same optimal system reliability in ... They can be both achieved by the simple TDMA schemes. For practical implementations, we further propose a fully distributed algorithm to implement the relaxed-TDMA scheme. Our results here may find applications in ...
Tópico(s): Advanced MIMO Systems Optimization
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Wireless Communications
Mahesh Arumugam, Sandeep S. Kulkarni,
An algorithm for time division multiple access (TDMA) is found to be applicable in converting existing distributed algorithms into a model that is consistent with sensor networks. Such a TDMA service needs to be self-stabilizing so that ... clock drift, it recovers to states from where TDMA slots are consistent. Previous self-stabilizing solutions for TDMA are either randomized or assume that the topology ... the question of feasibility of self-stabilizing deterministic TDMA algorithm where topology is unknown remains open. In ...
Tópico(s): Petri Nets in System Modeling
2005 - Springer Science+Business Media | Lecture notes in computer science
Giuseppe Caire, Daniela Tuninetti, Sergio Verdú,
... rate pairs achievable by time-division multiple access (TDMA) is not equal to the capacity region, the TDMA achievable region converges to the capacity region as the power decreases. Furthermore, TDMA achieves the optimum minimum energy per bit. Despite ... features, this paper shows that the growth of TDMA-achievable rates with the energy per bit is ... small region of interference parameters outside of which TDMA is also shown to be suboptimal. The effect ... known to the receiver) on the suboptimality of TDMA is also explored.
Tópico(s): Advanced MIMO Systems Optimization
2004 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Information Theory
Jongkwan Lee, Hongjun Noh, Jaesung Lim,
... propose and analyze a time division multiple access (TDMA)-based cooperative medium access control (MAC) protocol for ... idle slots. The proposed MAC, called cooperative relaying TDMA (CR-TDMA), allows a packet that is pre-assigned to ... multiple packets during only one frame. Furthermore, CR-TDMA does not require additional overhead, such as mini- ... The numerical and simulation results show that CR-TDMA can significantly improve performance if helper nodes are ... guarantee equivalent or better performance than a conventional TDMA even in the worst cases.
Tópico(s): Wireless Communication Security Techniques
2014 - IEEE Communications Society | IEEE Communications Letters
Juan Liu, Huaiyu Dai, Wei Chen,
... share the channel via time division multiple access (TDMA). In many existing works, it is commonly assumed ... time slot. We then study the equal-power TDMA scheme in the case where each node is ... method, we derive the performance of equal-power TDMA in this case, in terms of the energy ... battery case. We also consider an equal-time TDMA scheme, which assigns equal-length subslots to each ... system performance. It is found that equal-power TDMA always outperforms equal-time TDMA in the infinite-capacity battery case, whereas equal- ...
Tópico(s): Age of Information Optimization
2015 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
Yuanhuizi Xu, Kwan‐Wu Chin, Sieteng Soh,
... period controlled pseudo time-division multiple access (PCP-TDMA), a link scheduler that allows nodes to cooperatively ... to accommodate any topological changes. This means PCP-TDMA is particularly suited for use in large-scale MTR WMNs. We have evaluated PCP-TDMA in various network topologies, and compared it against ... serves as a benchmark. We also compare PCP-TDMA against two distributed approaches: JazzyMAC and ROMA. The results show that PCP-TDMA achieves similar performance with the centralized algorithm in ...
Tópico(s): Advanced Wireless Network Optimization
2017 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Vehicular Technology
VanDung Nguyen, Tran Anh Khoa, Thant Zin Oo, Nguyen H. Tran, Choong Seon Hong, Eui‐Nam Huh,
... is to employ both time-division multiple access (TDMA) and carrier-sense multiple access (CSMA) schemes (called a hybrid TDMA/CSMA scheme) in the control channel (CCH) interval. The scheme can adjust the length of the TDMA period depending on traffic conditions. In this paper, we propose a modified packet transmitted in the TDMA period to reduce transmission overhead under a hybrid TDMA/CSMA multi-channel MAC protocol. Simulation results show ... the CCH. In addition, we analyze the hybrid TDMA/CSMA multi-channel MAC protocol with the modified ...
Tópico(s): Bluetooth and Wireless Communication Technologies
2018 - Multidisciplinary Digital Publishing Institute | Sensors
Faezeh Hajiali, Adrien Métafiot, Laura Benitez‐Ek, Lea Alloune, Milan Maríc,
... NMP) of isobornyl methacrylate (IBOMA) and tridecyl methacrylate (TDMA), derived from sustainable feedstocks, with a low fraction ... succinimidyl ester‐functionalized form, NHS‐BB. IBOMA and TDMA‐rich compositions were both polymerized at 100 °C ... macroinitiator was then cleanly chain‐extended with poly(TDMA‐ stat ‐AN) and the diblock copolymers exhibited two ... transition temperatures (Tgs), indicative of microphase separation. IBOMA/TDMA/AN terpolymers with different IBOMA/TDMA molar ratios were also synthesized where terpolymers with ...
Tópico(s): Polymer Science and PVC
2018 - Wiley | Journal of Polymer Science Part A Polymer Chemistry
Vijendra Mishra, Raksha Upadhyay, Uma Rathore Bhatt, Abhay Kumar,
... this paper presents a cooperative mechanism namely DEC TDMA which is based on the concept of clustered TDMA. In DEC TDMA cooperation between front end and back end is ... efficiency for large number of ONUs. Moreover DEC TDMA exhibits better delay performance due to implementation of dynamic bandwidth allocation while providing data slots in TDMA. Therefore proposed mechanism offers delay and energy efficient ...
Tópico(s): Optical Network Technologies
2020 - Elsevier BV | Optik
Arif Obaid, Xavier Fernando, Muhammad Jaseemuddin,
... time slot in the time division multiple access (TDMA) frame (defined in Section 3). The sensor nodes ... same channel selected for that cluster. We use TDMA to schedule transmission of nodes within a cluster ... which happens periodically before the beginning of each TDMA frame. Nodes group themselves into clusters based on ... Each channel is divided into a sequence of TDMA superframes, which are themselves divided into frames and ... in Figure 4. FIGURE 3Open in figure viewerPowerPoint TDMA Frame Structure The TDMA frame sizes are fixed. ...
Tópico(s): Energy Efficient Wireless Sensor Networks
2021 - | IET Wireless Sensor Systems
Selahattin Koşunalp, Yunus Kaya,
... design and implementation of an improved version of TDMA scheme for wireless sensor networks (WSNs) exploiting the ... their basic principles and features. An adaptation of TDMA strategy, called IoT‐TDMA, is proposed to enhance the channel performances particularly ... and latency. To test the performance of IoT‐TDMA practically, a low‐cost node hardware with the capability of Internet connection is essentially designed. IoT‐TDMA has been implemented on real‐world highly scalable ...
Tópico(s): Mobile Ad Hoc Networks
2022 - Wiley | Concurrency and Computation Practice and Experience
... that the tree protocol is a generalization of TDMA and that an optimum dynamic tree adaptively changes ... essentially random access protocol in light traffic to TDMA in heavy traffic. A major result is that ... transmit, is greater than 1/\sqrt{2} , then TDMA and the optimum tree protocol axe the same. ... the optimum tree protocol is more efficient than TDMA. The maximum average throughput of a system consisting ... comparing the average delay properties of tree and TDMA protocols when applied to direct access and to ...
Tópico(s): Age of Information Optimization
1979 - Institute of Electrical and Electronics Engineers | IRE Transactions on Communications Systems