Temat: TDMA - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The secure transmission protocol of sensor Ad Hoc network
Bezpieczny protokół transmisji sensorowej sieci Ad Hoc
Autorzy:: Marczak, A.
Powiązania:: https://bibliotekanauki.pl/articles/955994.pdf
Data publikacji:: 2015
Wydawca:: Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:: TDMA
ad hoc
ASAP
OFB Mode
Opis:: The paper presents a secure protocol of radio Ad Hoc sensor network. This network operates based on TDMA multiple access method. Transmission rate on the radio channel is 57.6 kbps. The paper presents the construction of frames, types of packets and procedures for the authentication, assignment of time slots available to the node, releasing assigned slots and slots assignment conflict detection.
W artykule zaprezentowano bezpieczny protokół radiowej sieci sensorowej Ad Hoc. Sieć ta pracuje w oparciu o metodę wielodostępu TDMA. Szybkość transmisji w kanale radiowym wynosi 57,6 kb/s. Przedstawiono budowę ramek, rodzaje pakietów oraz procedury uwierzytelniania, przypisania wolnych szczelin czasowych do węzła, zwalniania przypisanych szczelin i wykrywania konfliktów przyporządkowania szczelin.
Źródło:: Zeszyty Naukowe Akademii Marynarki Wojennej; 2015, R. 56 nr 4 (203), 4 (203); 27-39
0860-889X
Pojawia się w:: Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An Active Broadcast System for Safety-Oriented Facilities in Decentralized TDMA Assisted VANETs
Autorzy:: Tamilarasi, A.
Sivabalaselvamani, D.
Rahunathan, L.
Adhithyaa, N.
Powiązania:: https://bibliotekanauki.pl/articles/2067546.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: VANETs
broadcasting services
TDMA-MAC
performance evaluation
Opis:: In data link layer for vehicular Ad hoc Network, a twelve digit access control mechanism is available. That is Medium Access Control (MAC) protocol should be able to accommodate a wide variety of safety oriented real time applications in vehicular ad-hoc networks (VANETs). The most important aspect of those applications is the transmission safety messages in which we call it as Basic Safety Messages (BSMs) through V2V and V2I systems. When traffic thickness is heavy, a scheduled transfer of BSMs places a large load on the VANETs’ stack, compromising network compatibility and performance. This article addresses a Decentralized TDMA-based framework for regulating transmission boundaries in VANETs to increase the potential of BSM transmissions. The transmitting effects are often low, but they do not reduce the consciousness of the nodes in close proximity. Consolidating packet collisions are often observed and cutoff at that time by a concerted effort among the nodes. Our procedures will provide a profitable and efficient BSM broadcasting, according to the simulation results.
Źródło:: Advances in Science and Technology. Research Journal; 2022, 16, 1; 122--128
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fast Data Collection in Tree-Based Wireless Sensor Networks
Autorzy:: Parashiva Murthy, B. M.
Tanuja, K.
Rakshitha, M.
Supretha, S.
Powiązania:: https://bibliotekanauki.pl/articles/1193576.pdf
Data publikacji:: 2016
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Convergecast
TDMA scheduling
multiple channels
power-control
routing trees
Opis:: The below work is done to address the things like how fast can information be collected from a wireless sensor network organized as tree using realistic simulation models under the many-to-one communication paradigm known as converge cast. We first consider time scheduling on a single frequency channel with the aim of minimizing the number of time slots required to complete a converge cast. Next, we combine scheduling with transmission power control to mitigate the effects of interference, and show that while power control helps in reducing the schedule length under a single frequency, scheduling transmissions using multiple frequencies is more efficient. To this end, we construct degree-constrained spanning trees and capacitated minimal spanning trees, and show significant improvement in scheduling performance over different deployment densities. Lastly, we evaluate the impact of different interference and channel models on the schedule length.
Źródło:: World Scientific News; 2016, 41; 230-238
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Optimization of channel access in wireless sensor networks
Autorzy:: Holecko, P.
Pirnik, R.
Bubenikova, E.
Powiązania:: https://bibliotekanauki.pl/articles/393455.pdf
Data publikacji:: 2012
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Tematy:: TDMA
optymalizacja
bezprzewodowe sieci sensorowe
optimization
wireless sensor networks
Opis:: The objective of the work presented in this paper is to analyse the problem of deployment of TDMA wireless sensor networks in the area of transport telematics from the communication subsystem optimization perspective. The problem of broadcast scheduling has been outlined and a heuristic algorithm has been designed for the optimization of radio channel access control using the TDMA method. The channel utilization was the main optimization goal while eliminating primary and secondary conflicts between the broadcasting stations.
Źródło:: Archives of Transport System Telematics; 2012, 5, 3; 31-34
1899-8208
Pojawia się w:: Archives of Transport System Telematics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Differentiated Service Model-Supported Cluster-Based Routing in Wireless Sensor Networks
Autorzy:: Agarkhed, Jayashree
Dattatraya, Patil Yogita
Patil, Siddarama
Powiązania:: https://bibliotekanauki.pl/articles/307674.pdf
Data publikacji:: 2020
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: clustering
energy efficiency
proxy server
TDMA
wireless sensor networks
Opis:: Wireless Sensor Network ﬁnds its extensive use in healthcare applications for the transfer of time-critical data through wireless connectivity. The primary cause of network failure is the transfer of time-critical multimedia data. The article presents a new dfferentiated service modelsupported (DSM) cluster-based routing in wireless sensor networks (WSNs) that overcomes the above issue. DSM prioritizes the transfer of dfferent ﬂow types based on packet type and packet size. The employment of computational offlading minimizes delay for critical and small-sized data packets and by carrying out data reduction of large-sized packets at proxy server. It outperforms the existing protocols in terms of energy efficiency, throughput, and reliability by prioritizing the transfer of time-critical health application data.
Źródło:: Journal of Telecommunications and Information Technology; 2020, 3; 1-9
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Impact of network architecture and aggregation proces on bandwidth allocation in wireless sensor networks
Autorzy:: Azizi, T.
Beghdad, R.
Powiązania:: https://bibliotekanauki.pl/articles/1839115.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: data aggregation
TDMA
bandwidth
superframe length
time slot
tree-based and spiral-based architecture
Opis:: Assigning bandwidth to sensors in a Wireless Sensor Network (WSN), while using Time Division Multiple Access (TDMA) protocol, remains an important problem. Even if many solutions were proposed in the literature, nevertheless, and since 2013, we are mainly focused on the critical study and the improvement of Masri’s approach published in Telecommunication Systems journal. In this paper, we introduce an extended version of our previous approaches (see Tarek Azizi and Rachid Beghdad, 2013, 2014, 2016) based on three fundamental concepts: network architecture, TDMA protocol, and data aggregation, in order to assign the maximum bandwidth to all sensor nodes. Three solutions will be presented in detail: Spiral-Based Clustered Data Aggregation (SBCDA) architecture, Tree-Based Clustered Data Aggregation (TBCDA), and Tree-Based ClusteredWireless Sensor Network (TBC-WSN). Aggregating data can reduce the number of the packets transmitted to the sink. This is the reason why, in the three approaches here described, each cluster head (CH) collects and aggregates received packets from its child nodes, before transmitting the resulting packet to its parent, until the data reaches the sink node (base station). With a number of simulations, we will demonstrate that our approaches are very competitive with Masri’s proposition, and also with two other recent works.
Źródło:: Control and Cybernetics; 2018, 47, 4; 411-437
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Secure Data Aggregation in Wireless Sensor Network using Chinese Remainder Theorem
Autorzy:: Thomas, Sanu
Mathew, Thomaskutty
Powiązania:: https://bibliotekanauki.pl/articles/2074141.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Chinese remainder theorem
authenticated aggregation
augmented Chinese remainder rystem
TDMA schedule
uplink path
relay node
Opis:: A new method of lossless Secure Data Aggregation for Wireless Sensor Network is presented. Secure Data Aggregation is achieved using the popular Chinese Remainder theorem. Here, an ‘Augmented Chinese Remainder System’ is introduced that incorporates additional features to enforce a higher level of security to the aggregated data. The scheme provides inbuilt signature verification and eliminates the need for separate data validation algorithms. The method achieves data integrity and authentication simultaneously in addition to lossless data aggregation for the data forwarded from the Cluster Head to the Base Station. The aggregate contains the entire individual data from sensors in the encrypted form and the receiver deaggregates it to get the original data in full without any loss. The Augmented Chinese Remainder System can be extended to secure Multi-level Data Aggregation for WSN.
Źródło:: International Journal of Electronics and Telecommunications; 2022, 68, 2; 329--336
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Implementation of Multiple Access Techniques Applicable for Maritime Satellite Communications
Autorzy:: Ilcev, S. D.
Powiązania:: https://bibliotekanauki.pl/articles/116635.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Global Maritime Distress and Safety System (GMDSS)
Maritime Mobile Satellite Communications (MMSC)
Multiple Access (MA)
Multiple Access Techniques
Code Division Multiple Access (CDMA)
Time Division Multiple Access (TDMA)
Frequency Division Multiple Access (FDMA)
Random (Packet) Division Multiple Access (RDMA)
Opis:: In this paper are introduced fundamentals, characteristics, advantages and disadvantages of Multiple Access (MA) employed as transmission techniques in the Maritime Mobile Satellite Communications (MMSC) between ships and Coast Earth Station (CES) via Geostationary Earth Orbit (GEO) or Not-GEO satellite constellations. In fixed satellite communication, as a rule, especially in MMSC many users are active at the same time. The problem of simultaneous communications between many single or multipoint mobile satellite users can be solved by using MA technique, such as Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), Space Division Multiple Access (SDMA) and Random (Packet) Division Multiple Access (RDMA). Since the resources of the systems such as the transmitting power and the bandwidth are limited, it is advisable to use the channels with complete charge and to create a different MA to the channel. This generates a problem of summation and separation of signals in the transmission and reception parts, respectively. Deciding this problem consists in the development of orthogonal channels of transmission in order to divide signals from various users unambiguously on the reception part.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 529-540
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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