Temat: cross-layer - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wykorzystanie projektowania międzywarstwowego dla transmisji multimedialnej w bezprzewodowych sieciach WLAN
Transfer of QoS multimedia with cross-layer techniques in WLAN environment
Autorzy:: Łubkowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/208319.pdf
Data publikacji:: 2006
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: QoS
WLAN
cross-layer
Opis:: W artykule przedstawiono ogólną ideę realizacji usług multimedialnych z gwarancjami jakości w bezprzewodowych sieciach WLAN. Dokonano charakterystyki bezprzewodowych sieci WLAN oraz wymagań jakościowych dla transmisji multimedialnej, ze szczególnym uwzględnieniem transmisji wideo. Przeprowadzono analizę rozwiązań projektowania międzywarstwowego wspierających realizację usług wideo z gwarancjami jakości. W dalszej części artykułu zaprezentowana została autorska koncepcja wykorzystania projektowania międzywarstwowego do realizacji transmisji wideo QoS w sieci WLAN.
The overall idea of QoS multimedia services in WLAN is presented. Short description of WLAN and quality requirements for multimedia transmission with special attention to video transfer, are presented too. The analysis of cross-layer solutions for QoS video is given in the paper. In the last part, the concept of using cross-layer for QoS video transmission in WLAN is shown.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2006, 55, sp.; 221-240
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Why Is White Noise Not Enough? Using Radio Front-End Models While Designing 6G PHY
Autorzy:: Kryszkiewicz, Pawel
Sroka, Pawel
Hoﬀmann, Marcin
Wachowiak, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/24200736.pdf
Data publikacji:: 2023
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 6G
cross-layer design
front-end nonlinearity
Opis:: Each subsequent generation of wireless standards imposes stricter spectral and energy eﬃciency demands. So far, layered wireless transceiver architectures have been used, allowing for instance to separate channel decoding algorithms from the front-end design. Such an approach may need to be reconsidered in the upcoming 6G era. Especially hardware-originated distortions have to be taken into account while designing other layer algorithms, as high throughput and energy eﬃciency requirements will push these devices to their limits, revealing their non-linear characteristics. In such a context, this paper will shed some light on the new degrees of freedom enjoyed while cross-layer designing as well as controlling multicarrier and multiantenna transceivers in 6G systems.
Źródło:: Journal of Telecommunications and Information Technology; 2023, 2; 41--45
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Interworking and cross-layer service discovery extensions for IEEE 802.11s wireless mesh standard
Autorzy:: Gierłowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/307686.pdf
Data publikacji:: 2013
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: 802.11
cross-layer
interworking
mesh
wireless networks
Opis:: With the rapid popularization of mobile end-user electronic devices, wireless network technologies begin to play a crucial role as networks access technologies. While classic point-to-multipoint wireless access systems, based on fixed infrastructure of base stations providing access to clients, remain the main most popular solution, an increasing attention is devoted to wireless mesh systems, where each connecting client can extend overall resources of the network by becoming a network node capable of forwarding transit traffic. This ability results in severe reduction of the necessary network infrastructure, provides through coverage (thereby offering significant step towards ubiquity of network access) and offers massive redundancy. One of the most promising wireless mesh solutions currently being developed is an IEEE 802.11s standard, based on popular Wi-Fi technology. It combines low deployment costs with comprehensive suite of mechanisms able to operate a self-forming, autoconfigurable, dynamically extending, and secure mesh solution. However, despite its advantages, the standard lacks sufficient support for a number of functionalities, which can lead to significant inefficiency and degradation of service quality in real-world IEEE 802.11s network deployments. In the paper we propose a number of extensions of IEEE 802.11s mechanisms, designed to provide better service quality in case of real-world deployment scenarios, especially in case of large systems. Both propositions introduce modifications to mesh path discovery and interworking procedures, while retaining compatibility with standard solution. Their basic functionality and efficiency have been verified by means of simulation model in large-scale, self-organizing mesh structure. Subsequently they have been implemented and tested in real-world, access network testbed deployment. The results clearly indicate their utility, particularly in case of larger deployments of this network system type.
Źródło:: Journal of Telecommunications and Information Technology; 2013, 3; 97-105
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Protocols for Wireless Sensor Networks: A Survey
Autorzy:: Kochhar, A.
Kaur, P.
Singh, P.
Sharma, S.
Powiązania:: https://bibliotekanauki.pl/articles/958098.pdf
Data publikacji:: 2018
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cross-layer
Medium Access Control
protocols
Wireless Sensor Networks
Opis:: This paper presents a survey on the MAC and network layer of Wireless Sensor Networks. Performance requirements of the MAC layer are explored. MAC layer protocols for battery-powered networks and energy harvesting-based networks are discussed and compared. A detailed discussion on design constraints and classification of routing protocols is presented. Several routing protocols are compared in terms of such parameters as: energy consumption, scalability, network lifetime and mobility. Problems that require future research are presented. The cross-layer approach for WSNs is also surveyed.
Źródło:: Journal of Telecommunications and Information Technology; 2018, 1; 77-87
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: CL-mWSNs: Cross Layer Model-Based QoS Centric Routing Protocol for Mission-Critical Cooperative Communication in Mobile WSNs
Autorzy:: Reddy, Kummathi Chenna
Devanagavi, Geetha D.
Thippeswamy, M. N.
Powiązania:: https://bibliotekanauki.pl/articles/309292.pdf
Data publikacji:: 2019
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: cross-layer signaling
link quality estimation
quality of service
wireless sensor networks
Opis:: The paper presents a robust QoS centric routing protocol for mission-critical communication over mobile Wireless Sensor Networks (CL-mWSN) that exploits dynamic network states from the diﬀerent layers of the IEEE 802.15.4 protocol stack to make the routing decision. The CL-mWSN protocol exploits three key layers: application layer, network layer and MAC layer. It exhibits proactive network and node table management, service diﬀerentiation, fair resource scheduling and congestion detection, avoidance at the network layer, as well as dynamic link quality estimation and packet injection rate estimation at the MAC layer to assess its candidature as the best forwarding node for QoS-centric mission-critical communication. Simulation reveals that the proposed routing model exhibits higher throughput, minimum loss and deadline miss ratio that augments QoS provision in mobile WSNs.
Źródło:: Journal of Telecommunications and Information Technology; 2019, 2; 53-63
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:: Influence of measuring deviations of the components of layered walls on their durability
Autorzy:: Tomaszewicz, Dariusz
Baryłka, Adam
Powiązania:: https://bibliotekanauki.pl/articles/111180.pdf
Data publikacji:: 2020
Wydawca:: Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:: texture layer
hanger
lagging
anchor rod
cross structure of the building
Opis:: The subject of the article is the impact of measurement deviations of three-layer walls on the durability of these walls in buildings erected according to the OWT-67 / N system. This problem mainly concerns the external facade texture layer, which, apart from its own weight load, is exposed to the destructive influence of external factors, which include wind suction load and temperature load. The measurement deviation regarding the texture layer is the varied thickness of the board. Other diverse components that affect the fusion of the texture layer with the insulation layer and the construction layer are: diameter of rods hangers, coating thickness of rods hangers and diameter of rods anchoring hangers. Based on these measurements, a polynomial model was created based on an experimental plan that evaluated the durability of the layered wall.
Źródło:: Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2020, 3; 1-8
2450-1859
2450-8721
Pojawia się w:: Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:: Biblioteka Nauki

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