Artículos de revistas: "SCTP / TCP"

1

Sun, Yu, Xing y Qin. "Parallel Transmission of Distributed Sensor Based on SCTP and TCP for Heterogeneous Wireless Networks in IoT". Sensors 19, n.º 9 (29 de abril de 2019): 2005. http://dx.doi.org/10.3390/s19092005.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Sensors in the Internet of Things (IoT) generate large amounts of data, which requires high-speed data transmission. In order to achieve the parallel transmissions of the wireless sensor network on the transmission layer, the performance of stream control transmission protocol (SCTP) and transmission control protocol (TCP) in the wireless sensor network under different packet error rates was simulated and compared. A dynamic multipath handover method for SCTP (MS-SCTP) was proposed to improve the transmission performance, which selects the transmission path according to the packet error rate and the retransmission ratio in the sender’s buffer. The TCP and SCTP protocol switching method (TCP-SCTP) was proposed to detect the current network traffic and adjust the MS-SCTP or TCP method. Analysis and simulation results show that MS-SCTP and TCP-SCTP could improve network throughput and reduce packet loss rate. MS-SCTP and TCP-SCTP can be combined with other technologies and channel allocation algorithms to improve network traffic.

2

Weng, Hui Min, Ming He Huang, Hao Wang, Chang Qiao Xu y Kai Liu. "The Analysis and Simulation of Stream Control Transmission Protocol". Applied Mechanics and Materials 433-435 (octubre de 2013): 1795–99. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1795.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Stream Control Transmission Protocol (SCTP) is a new generation of reliable transport layer protocol, unlike TCP, it has new features of multi-homing and multi-streaming, and has good scalability. SCTP is expected to replace TCP as the next generation of universal transport layer protocol. We introduce and analyze the basic structure and features of SCTP, introduce the related research of SCTP, including the implementation method of mobile SCTP and the Concurrent Multipath Transfer mechanism. Finally, compared and analyzed the performance of TCP, SCTP and SCTP-CMT by the ns-2 simulations, results show that in the case of multiple paths are available, the transmission performance of SCTP and SCTP-CMT are both better than TCP.

3

Surimi, La y Reza Pulungan. "Analisis Kualitas VoIP pada SCTP Menggunakan ECN dan AQM". IJCCS (Indonesian Journal of Computing and Cybernetics Systems) 9, n.º 2 (31 de julio de 2015): 121. http://dx.doi.org/10.22146/ijccs.7541.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

AbstrakVoIP merupakan aplikasi real time yang kualitasnya sangat tergantung pada delay dan jitter, yang mana hal ini sulit dipenuhi oleh protokol yang bersifat reliable dan memiliki congestion control seperti TCP. Di sisi lain penggunaan UDP yang tidak memiliki congestion control menyebabkan peluang terjadinya congestion pada jaringan sangat besar. Penggunaan SCTP sebagai protokol alternatif juga belum mampu mengakomodasi kekurangan TCP dan UDP. Beberapa hasil penelitian menunjukkan perlu adanya perbaikan ataupun modifikasi pada mekanisme congestion control yang dimiliki oleh SCTP. Penggunaan mekanisme ECN dan AQM pada beberapa penelitian menunjukkan bahwa kedua mekanisme ini dapat menurunkan delay dan jitter. Penelitian ini melakukan pengujian terhadap kualitas VoIP di atas SCTP yang menggunakan ECN dan AVQ pada network simulator NS2. Hasil simulasi menunjukkan bahwa penggunaan mekanisme ECN dan AVQ pada protokol SCTP menghasilkan kualitas VoIP yang lebih baik pada kondisi jaringan yang tidak ideal (high Latency low Bandwidth dan low Latency low Bandwidth dari pada penggunaan protokol SCTP tanpa menggunakan mekanisme ECN dan AVQ. Penelitian ini juga melakukan perbandingan nilai MOS panggilan VoIP SCTP yang menggunakan ECN dan AVQ dengan nilai MOS panggilan VoIP yang menggunakan protokol TCP dan UDP. Hasilnya SCTP dengan ECN dan AVQ mengungguli TCP namun belum dapat mengungguli UDP. Kata kunci— VoIP, SCTP, ECN, AQM,AVQ. AbstractVoIP is the real time applications that are highly dependent on the quality of delay and jitter, which it is difficult to be met by protocol that has reliable data transfer feature and congestion control such as TCP. On the other hand the use of UDP that has no congestion control make chance of causing congestion in the network is very large. The use of SCTP as an alternative protocol was also not able to accommodate the weaknesses of TCP and UDP. Some research shows that repairs or modifications to the SCTP congestion control mechanism is needed.The Use of ECN and AQM in some studies show that these two mechanisms can reduce delay and jitter. This study tested the quality of VoIP over SCTP with ECN and AVQ, in NS2. Simulations carried out by independent replication technique, and the results showed that ECN and AVQ can increase the value of MOS VoIP calls significantly in non ideal network scenarios. This study also did comparison of SCTP MOS that uses ECN and AVQ with MOS values VoIP using TCP and UDP. The result showed that SCTP with ECN and AVQ outperform TCP but can not surpass UDP yet. Keywords— VoIP, SCTP, ECN, AQM,AVQ.

4

Li, Ying Yong, Yu Chun Ma y Xiao Yan Chen. "Transparent TCP-to-SCTP Translation Using Shim Rules-Table Dynamic Configuration". Advanced Materials Research 268-270 (julio de 2011): 1500–1507. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.1500.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Using the application of bulk data transfer, we investigate the performance of existing TCP-to-SCTP Translation shim scheme under the scenario of shim rules-table is static (i.e., manual). We find that a potential problem named stale shim rules-table value caused by shim rules-table static configuration, which induces TCP-to-SCTP Translation does not startup in time. Based on this, we present a suggestion called Shim Rules-table Dynamic Configuration (SRDC) for TCP-to-SCTP Translation to implement the real-time startup and to improve the throughput of SCTP association by modify original shim rules-table command list, original socket option, original function of connection( ) and sosend( ).

5

Zafar, S. y U. Ejaz. "SCTP-aware Link Layer Retransmission Mechanism for Smart-grid Communication Network". Engineering, Technology & Applied Science Research 6, n.º 4 (26 de agosto de 2016): 1093–98. http://dx.doi.org/10.48084/etasr.685.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

The smart grid delivers electricity from suppliers to consumers and uses bidirectional communication to exchange real-time information between supply system and smart meters at the user end. With a combined communication infrastructure, smart grid manages the operation of all associated components to provide reliable and supportable electricity supply. The Neighborhood Area Network (NAN) of smart grid supports bi-directional data transfer between smart meters (installed at customer premises) and control center of the utility company through an aggregator. This communication suffers low throughput and excessive delays due to the Head of Line (HOL) blocking when the Transmission Control Protocol (TCP) is implemented for reliability. In this paper we propose SCTP-aware Link Layer Retransmission mechanism (SCTP-LLR) which augments the Stream Control Transmission Protocol (SCTP) with Link Layer Retransmissions at the aggregator. SCTP-LLR uses the multi-streaming feature offered by SCTP and implements link layer retransmissions at the aggregator to mitigate the effect of HOL blocking. We carried out simulations using Network Simulator and compared the performance of SCTP-LLR against TCP and SCTP. Our results show that SCTP-LLR outperforms both TCP and SCTP in terms of throughput and packet delays and is a promising protocol to be implemented in smart grid NAN for reliable and efficient communication.

6

Halid, Agus y Reza Pulungan. "Analisis Pengaruh Ukuran Window Pada Pengendali Kemacetan di SCTP Menggunakan Fitur Multihoming". IJCCS (Indonesian Journal of Computing and Cybernetics Systems) 9, n.º 2 (31 de julio de 2015): 133. http://dx.doi.org/10.22146/ijccs.7542.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

AbstrakStream Control Transmission Protocol (SCTP) merupakan protokol yang mirip dengan Transmission Control Protocol (TCP) dan User Datagram Protocol (UDP). SCTP merupakan protokol yang bersifat reliable dan connectionless. Protokol ini memiliki kemampuan multistreaming dan multihoming dalam melakukan transmisi data. Penelitian ini merupakan pemodelan terhadap SCTP menggunakan simulator OPNET yang dapat menjadi akselerasi bagi peneliti dalam bidang jaringan. SCTP pada simulator dibangun dengan melakukan modiﬁkasi terhadap TCP. Pemodelan dimulai dengan membangun skenario jaringan dan menentukan bandwidth pada jalur yang akan dilewati oleh paket data.Modiﬁkasi ukuran window dalam penelitian ini menggunakan nilai 1 MMS, 2 MMS hingga 10 MMS pada pengendali kemacetan. Tujuannya adalah untuk melihat pengaruh modiﬁkasi ukuran window terhadap nilai packet loss, delay dan throughput. Hasil pengukuran memperlihatkan bahwa nilai throughput tertinggi terdapat pada Skenario Kedua sebagaimana diperlihatkan pada Tabel 6.4 dengan nilai throughput sebesar 433.566,0244 bit/s. Penggunaan ukuran window dalam pengendali kemacetan dimaksudkan untuk menghindari banjir data pada sisi endpoint yang dapat menyebabkan packet loss. Kata kunci—Pengendali kemacetan, throughput, delay, packet loss, ukuran window, multihoming, SCTP Abstract Stream Control Transmission Protocol (SCTP) is a protocol that is similar to the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). SCTP is a protocol that is both reliable and connectionless. This protocol has the ability multistreaming and multihoming in the transmit data.This research is the modeling of the SCTP using OPNET simulator that can be accelerated for researchers in the ﬁeld of networking. SCTP on the simulator was built to perform modiﬁcations to TCP. Modeling starts with building a network scenarios and determine the bandwidth on the path that will be passed by data packets.Modiﬁcation of window size in this research using 1 MMS, 2 MMS up to 10 MMS on congestion control. The aim is to disclose the effect of modiﬁcation of the window size to the value packet loss, delay and throughput. The measurement results show that the throughput rate is highest in the Second Scenario as shown in Table 6.4 with throughput value of 433.566,0244 bits/s. Using window size in congestion control is intended to prevent a ﬂood of data on the endpoint that can lead to packet loss. Keywords—Congestion control, throughput, delay, packet loss, window size, multihoming, SCTP

7

Feshchenko, Zakharii-Andrii y Iryna Yurchak. "Improving the efficiency of SCTP network software". Computer systems and network 4, n.º 1 (16 de diciembre de 2022): 147–54. http://dx.doi.org/10.23939/csn2022.01.147.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

The work presents a software system for demonstrating the operation of the SCTP transport protocol in comparison with its better-known analogues – TCP and UDP. To reproduce the operation of the chosen protocol, a socket API was created that describes the operation of SCTP, based on RFC 6458. It also describes the transport protocols that are similar to the protocol that was chosen to improve performance, namely TCP and UDP, their strengths and weaknesses, and what has been improved in SCTP. A test software model is described, which is divided into a client part and a server part, which was created to demonstrate the operation of the SCTP transport protocol. The client part consists in sending a message to the server, which will read this message and reset it. The ability to send using the SCTP protocol directly, or UDP encapsulation, thus encapsulating the SCTP packet into a UDP datagram, has been developed. The efficiency and expediency of using the software model are shown and alternative software models designed to implement the SCTP protocol are considered. The means used to implement this decision are justified as well as the platforms and operating systems on which this solution can be reproduced, other than Windows.

8

Yu, Hai, Yue Yu, Qi Gui Yao, Hui Deng y Wen Shen. "Communication Fault Recovery Technology Research in IntelliGrid". Advanced Materials Research 1030-1032 (septiembre de 2014): 1680–83. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.1680.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Analysis and comparison of the communication failure of IntelliGrid architecture alternative recovery technology, and points out that SCTP is capable of providing communication service restoration protocols at the transport layer, based on analysis of the characteristics of SCTP and analyze the characteristics of SCTP and TCP protocol, the method of network simulation research of the network link failure disconnected, network level fault tolerance mechanism of SCTP multihoming path switching characteristics based on, and for the lack of SCTP multihoming path switching method, put forward a kind of improved SCTP multihoming path switching method, through the simulation verifies the effectiveness of the application of this method in multi router network model, laid the foundation for the application of SCTP for power system.

9

Stewart, R. y C. Metz. "SCTP: new transport protocol for TCP/IP". IEEE Internet Computing 5, n.º 6 (2001): 64–69. http://dx.doi.org/10.1109/4236.968833.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Fan, Ya Qin, Shu Ting Liu y Chi Li. "Performance Simulation of the SCTP under the Multi Path Environment". Applied Mechanics and Materials 738-739 (marzo de 2015): 1174–77. http://dx.doi.org/10.4028/www.scientific.net/amm.738-739.1174.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

This paper studies the basic features and functions of STCP. The traditional TCP protocol and the basic standard SCTP protocols are simulated respectively. We analysis that when the host has multiple network addresses and there are multiple paths between ends, how do the STCP protocol and TCP protocol perform. For practical implementation, using CWND size parameters show performance of multi path transmission in practice, and compare with the ideal case. The results of the simulation and analysis of multi path transmission under the SCTP agreement have practical significance in the future network with multi path transmission.

11

Wheeb, Ali Hussein. "Performance Evaluation of UDP, DCCP, SCTP and TFRC for Different Traffic Flow in Wired Networks". International Journal of Electrical and Computer Engineering (IJECE) 7, n.º 6 (1 de diciembre de 2017): 3552. http://dx.doi.org/10.11591/ijece.v7i6.pp3552-3557.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

<p>The demand for internet applications has increased rapidly. Providing quality of service (QoS) requirements for varied internet application is a challenging task. One important factor that is significantly affected on the QoS service is the transport layer. The transport layer provides end-to-end data transmission across a network. Currently, the most common transport protocols used by internet application are TCP (Transmission Control Protocol) and UDP (User Datagram Protocol). Also, there are recent transport protocols such as DCCP (data congestion control protocol), SCTP (stream congestion transmission protocol), and TFRC (TCP-friendly rate control), which are in the standardization process of Internet Engineering Task Force (IETF). In this paper, we evaluate the performance of UDP, DCCP, SCTP and TFRC protocols for different traffic flows: data transmission, video traffic, and VOIP in wired networks. The performance criteria used for this evaluation include throughput, end to end delay, and packet loss rate. Well-known network simulator NS-2 used to implement the UDP, DCCP, SCTP, and TFRC protocols performance comparison. Based on the simulation results, the performance throughput of SCTP and TFRC is better than UDP. Moreover, DCCP performance is superior SCTP and TFRC in term of end-to-end delay.</p>

12

Wheeb, Ali H. y Dimitris N. Kanellopoulos. "Simulated Performance of SCTP and TFRC Over MANETs". International Journal of Business Data Communications and Networking 16, n.º 2 (julio de 2020): 69–83. http://dx.doi.org/10.4018/ijbdcn.2020070104.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Mobile ad-hoc networks (MANETs) are composed of mobile nodes communicating through wireless medium, without any fixed centralized infrastructure. Providing quality of service (QoS) support to multimedia streaming applications over MANETs is vital. This paper focuses on QoS support, provided by the stream control transmission protocol (SCTP) and the TCP-friendly rate control (TFRC) protocol to multimedia streaming applications over MANETs. In this study, three QoS parameters were considered jointly: (1) packet delivery ratio (PDR), (2) end-to-end delay, (3) and throughput. Specifically, the authors analyzed and compared the simulated performance of the SCTP and TFRC transport protocols for delivering multimedia streaming over MANETs. Two simulation scenarios were conducted to study the impact of traffic load and node speed (mobility) to their performance. Based on the simulation results, the authors found that the PDR and the end-to-end delay of TFRC are slightly better than those of SCTP in both scenarios. Additionally, the performance of SCTP is significantly better than TFRC in terms of throughput.

13

Halepoto, I. A., I. H. Sadhayo, M. S. Memon, A. Manzoor y S. Bhatti. "Analysis of Retransmission Policies for Parallel Data Transmission". Engineering, Technology & Applied Science Research 8, n.º 3 (19 de junio de 2018): 3079–83. http://dx.doi.org/10.48084/etasr.2085.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Stream control transmission protocol (SCTP) is a transport layer protocol, which is efficient, reliable, and connection-oriented as compared to transmission control protocol (TCP) and user datagram protocol (UDP). Additionally, SCTP has more innovative features like multihoming, multistreaming and unordered delivery. With multihoming, SCTP establishes multiple paths between a sender and receiver. However, it only uses the primary path for data transmission and the secondary path (or paths) for fault tolerance. Concurrent multipath transfer extension of SCTP (CMT-SCTP) allows a sender to transmit data in parallel over multiple paths, which increases the overall transmission throughput. Parallel data transmission is beneficial for higher data rates. Parallel transmission or connection is also good in services such as video streaming where if one connection is occupied with errors the transmission continues on alternate links. With parallel transmission, the unordered data packets arrival is very common at receiver. The receiver has to wait until the missing data packets arrive, causing performance degradation while using CMT-SCTP. In order to reduce the transmission delay at the receiver, CMT-SCTP uses intelligent retransmission polices to immediately retransmit the missing packets. The retransmission policies used by CMT-SCTP are RTX-SSTHRESH, RTX-LOSSRATE and RTX-CWND. The main objective of this paper is the performance analysis of the retransmission policies. This paper evaluates RTX-SSTHRESH, RTX-LOSSRATE and RTX-CWND. Simulations are performed on the Network Simulator 2. In the simulations with various scenarios and parameters, it is observed that the RTX-LOSSRATE is a suitable policy.

14

McClellan, Stan, Wuxu Peng y Ed Gonzalez. "Improving Throughput in SCTP via Dynamic Optimization of Retransmission Bounds". Network Protocols and Algorithms 7, n.º 3 (30 de noviembre de 2015): 89. http://dx.doi.org/10.5296/npa.v7i3.8228.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

The Stream Control Transmission Proto-col (SCTP) is a relatively new transport protocol. Ithas several underlying mechanisms that are similar tothe Transmission Control Protocol (TCP), as well asseveral improvements that are important in certainclasses of applications. The timeout scheme of SCTP,however, is almost identical to that used in TCP.With the dynamics of today’s Internet, that timeoutscheme may be too passive. This paper presents an al-gorithm which dynamically adjusts the overall contextof the retransmission timeout process without chang-ing the fundamental retransmission mechanisms. Thisapproach manages the impact of fast retransmissionsand timeouts to significantly improve the throughputof SCTP applications. The algorithm has been im-plemented and tested in real network environments.Experimental results show that the algorithm avoidsspurious retransmissions and provides better through-put by intelligently managing RTO boundaries andallowing conventional timeout schemes to participatemore actively in the retransmission process.

15

Kanellopoulos, Dimitris N. y Ali H. Wheeb. "Simulated Performance of TFRC, DCCP, SCTP, and UDP Protocols Over Wired Networks". International Journal of Interdisciplinary Telecommunications and Networking 12, n.º 4 (octubre de 2020): 88–103. http://dx.doi.org/10.4018/ijitn.2020100107.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Multimedia applications impose different QoS requirements (e.g., bounded end-to-end delay and jitter) and need an enhanced transport layer protocol that should handle packet loss, minimize errors, manage network congestion, and transmit efficiently. Across an IP network, the transport layer protocol provides data transmission and affects the QoS provided to the application on hand. The most common transport layer protocols used by Internet applications are TCP and UDP. There are also advanced transport layer protocols such as DCCP and TFRC. The authors evaluated the performance of UDP, DCCP, SCTP, and TFRC over wired networks for three traffic flows: data transmission, video streaming, and voice over IP. The evaluation criteria were throughput, end-to-end delay, and packet loss ratio. They compared their performance to learn in which traffic flow/service each of these protocols functions better than the others. The throughput of SCTP and TFRC is better than UDP. DCCP is superior to SCTP and TFRC in terms of end-to-end delay. SCTP is suitable for Internet applications that require high bandwidth.

16

Arshad, Mohammad Junaid y Mohammad Saleem. "A simulation-based study of FAST TCP compared to SCTP: Towards multihoming implementation using FAST TCP". Journal of Communications and Networks 12, n.º 3 (junio de 2010): 275–84. http://dx.doi.org/10.1109/jcn.2010.6388456.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Choi, Yong-Woon y Yong-Jin Lee. "Multihoming Effect of SCTP Over TCP in the Link-down Environment". Journal of the Korea Contents Association 9, n.º 8 (28 de agosto de 2009): 73–83. http://dx.doi.org/10.5392/jkca.2009.9.8.073.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Kozlovszky, M., T. Berceli y L. Kutor. "Analysis of SCTP and TCP based communication in high-speed clusters". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, n.º 1 (abril de 2006): 85–89. http://dx.doi.org/10.1016/j.nima.2005.11.107.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Ahuja, Sanjay P. y W. Russell Shore. "Wireless Transport Layer Congestion Control Evaluation". International Journal of Wireless Networks and Broadband Technologies 1, n.º 3 (julio de 2011): 71–81. http://dx.doi.org/10.4018/ijwnbt.2011070105.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

The performance of transport layer protocols can be affected differently due to wireless congestion, as opposed to network congestion. Using an active network evaluation strategy in a real world test-bed experiment, the Transport Control Protocol (TCP), Datagram Congestion Control Protocol (DCCP), and Stream Control Transport Protocol (SCTP) were evaluated to determine their effectiveness in terms of throughput, fairness, and smoothness. Though TCP’s fairness was shown to suffer in wireless congestion, the results showed that it still outperforms the alternative protocols in both wireless congestion, and network congestion. In terms of smoothness, the TCP-like congestion control algorithm of DCCP did outperform TCP in wireless congestion, but at the expense of throughput and ensuing fairness. SCTP’s congestion control algorithm was also found to provide better smoothness in wireless congestion. In fact, it provided smoother throughput performance than in the network congestion.

20

Wisam Dawood Abdullah. "EVALUATION OF VOIP TRAFFICS OVER TIKRIT UNIVERSITY NETWORKS". Tikrit Journal of Pure Science 21, n.º 1 (4 de febrero de 2023): 140–46. http://dx.doi.org/10.25130/tjps.v21i1.964.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

In recent years, VoIP is a rapidly evolving technology that could possibly revolutionize the telecommunication industry. When implemented on wireless data networks, VoIP could prove to be instrumental in the convergence of existing fixed and cellular telephony networks with the fast growing wired and wireless data networks. Whereas, the growth of the VoIP applications with additional mobile devices in the institution of higher education and increasing number of users led to slow VoIP services. In addition, the throughput and latency (or delay, jitter, and jabber) are two of the most important issues that need to be resolved before the commercial deployment of wireless VoIP. The trace composes of two parts: firstly, collecting of data, secondly, performing the traffics analysis. Therefore, we have analyzed the performance offered by SCTP, TCP and UDP over VoIP at Tikrit University, Iraq. In this paper, we can see that the kind of performance given by SCTP is best then UDP, but the latency is decreased it performance significantly compared to UDP and the SCTP throughput is looks in a better manner. The measurements were verified by simulating the VoIP traffics using Network Simulator 2

21

Tabaiyan, Mostafa y Mehdi Agha Sarram. "A Method Based on RTO and Selective Acknowledgement for Improving SCTP Protocol Performance in Mobile Ad Hoc Networks". Modern Applied Science 10, n.º 6 (8 de junio de 2016): 238. http://dx.doi.org/10.5539/mas.v10n6p238.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

With the increasing development of Mobile Ad Hoc Network usage, there will be more need to have a transport protocol with an appropriate throughput in end to end transport. Because of the design nature of TCP protocol for wired Networks, its application in Mobile Ad-hoc Networks causes a reduction in efficiency, performance and throughput.Protocols such as SCTP with sufficient validity and reliability in data transfer are proposed as solution for increasing throughput. However, in order to provide the above quality, sacrifice factors such as Network balance. In the present paper, two optimized transporting algorithm are introduced. These algorithm act based on retransmission timeout control and selective acknowledgement number for transmissions in SCTP protocol. The offered algorithms using implemented NS-2 simulator and throughput improvement and reduction of packet delay time are compared with former protocols.

22

Awang Nor, Shahrudin, Raaid Alubady y Wisam Abduladeem Kamil. "Simulated performance of TCP, SCTP, DCCP and UDP protocols over 4G network". Procedia Computer Science 111 (2017): 2–7. http://dx.doi.org/10.1016/j.procs.2017.06.002.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Stanciu, Valentin, Mugurel Ionut¸ Andreica, Vlad Olaru y Nicolae T¸ ˘apus. "Design and Development of a UDP-Based Connection-Oriented Multi-Stream One-to-Many Communication Protocol". Journal of Telecommunications and Information Technology, n.º 1 (30 de marzo de 2012): 3–15. http://dx.doi.org/10.26636/jtit.2012.1.1247.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

A communication protocol is a set of rules defined formally that describes the format of digital messages and the rules for exchanging those messages in or between computing systems. The Internet Protocol Suite used for communications throughout the Internet uses encapsulation to provide a way of abstracting protocols and services. This abstraction is grouped into layers of general functionality. For protocols on the transmission layer, many choices exist. But while popular protocols such as TCP, UDP and SCTP do provide connection oriented communication offering reliability, ordering and data integrity, solutions that offer such connections from one point to multiple endpoints are still limited. TCP only supports point-to-point communication and SCTP offers multi-homing functionality, but the transmission is still limited to two logical endpoints. In this paper we use the simple, stateless, transmission model of UDP in order to provide TCP-like services for one-to-many communication that is not limited to just multi-homing or other particular solutions. The protocol supports reliable communication from one endpoint to multiple endpoints in different transmission modes. In order to make it easier for developers to customize the protocol to their needs and possibly extend/modify it in order to create new variants from it, the protocol is developed in user space. Because of this design restriction performance wasn’t the main objective of our work, but rather the ease of customization and experimentation with new protocol variants. The protocol was implemented in the C++ programming language using classes with virtual members. New variants of components, such as packet retransmission, can easily be implemented without changing the whole code base.

24

Lavanya, K., Dr R.Kanthavel y Dr R.Dhaya. "Efficient Streaming of Video Frames over Heterogeneous Wireless Network". International Journal of Engineering & Technology 7, n.º 3.34 (1 de septiembre de 2018): 226. http://dx.doi.org/10.14419/ijet.v7i3.34.18970.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Transferring high quality video stream through a heterogeneous wireless network has many challenges due to the varying data rate and round trip time(RTT) involved in the network and the more stringent quality of service(QoS) requirements of the multimedia application such as on time delivery , minimum delay etc. User datagram protocol (UDP), a connectionless, unreliable transport protocol has been widely used for transferring video frames.UDP cannot guarantee reliable information delivery and may lead to packet loss. The packet loss, increases with time varying bandwidth availability in the heterogeneous wireless networks. Transmission control protocol(TCP) can be an alternate transport layer protocol to provide reliable delivery of video information. But, using TCP for wireless networks has limitations due to misinterpretation of packet loss, frequent link failure, asymmetric link behaviour etc.,. which minimizes the throughput and in turn degrades the quality of the video frames transmitted. This paper analyses an efficient scheme to use Heterogeneous Environment Retransmission algorithm with SCTP (HERTS) to transfer video data in the heterogeneous environment. By using multi-homing and multi-streaming feature of Stream control transmission protocol (SCTP), the packet delivery rate, through put and delay requirements can be optimized. The transport layer model suggested in this paper aims at reducing the occupancy of the retransmitted packets in the link, by using a separate end to end path allotted for retransmission.

25

Choi, Yong-Woon, Kwang-Moon Cho y Yong-Jin Lee. "Web Traffic Analysis according to the Link-down Duration of TCP and SCTP". Journal of the Korea Contents Association 10, n.º 3 (28 de marzo de 2010): 44–52. http://dx.doi.org/10.5392/jkca.2010.10.3.044.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Chellaprabha, B. "Performance of TCP, UDP and SCTP on Sensor Network with Different Data Reporting Intervals". IOSR Journal of Engineering 02, n.º 04 (abril de 2012): 621–28. http://dx.doi.org/10.9790/3021-0204621628.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

YAMADA, Shota, Daisuke ISHII, Satoru OKAMOTO y Naoaki YAMANAKA. "Performance Evaluation of TCP/IP over SCTP/IP Parallel Networking with Parallel Route Transmission". IEICE Transactions on Communications E94-B, n.º 8 (2011): 2394–96. http://dx.doi.org/10.1587/transcom.e94.b.2394.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

HASHIMOTO, Masafumi, Go HASEGAWA y Masayuki MURATA. "SCTP Tunneling: Flow Aggregation and Burst Transmission to Save Energy for Multiple TCP Flows over a WLAN". IEICE Transactions on Communications E96.B, n.º 10 (2013): 2615–24. http://dx.doi.org/10.1587/transcom.e96.b.2615.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Мустафаєва, Е. А. "Дослідження залежності стеганографічних систем від характеристик прихованої інформації". Problems of Informatization and Management 3, n.º 67 (12 de octubre de 2021): 46–53. http://dx.doi.org/10.18372/2073-4751.67.16203.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Для побудови досконалих стеганографічних систем необхідно враховувати безліч параметрів, у тому числі їх залежність від характеристик інформації, що приховується, і каналу зв'язку, що використовується для секретної передачі. У зв'язку з цим у статті досліджується залежність стеганографічних систем від таких характеристик, як обсяг, формат, форма подання, призначення прихованої інформації. Пропонуються підходи правильного вибору контейнера, алгоритму застосування, каналів прихованої передачі залежно від цих параметрів. У ході досліджень залежності між обсягом прихованої інформації та ступенем стійкості стегоконтейнера до можливого стеганографічного аналізу з'ясувалося, що поліпшення одного з цих показників призводить до абсолютного погіршення іншого. Крім того, в статті досліджується стійкість контейнера та інформації, що приховується в ньому, різним шумам, стисканням з втратами, фільтрацію, модифікацію, аналого-цифровим і цифро-аналоговим перетворенням для побудови досконалих стеганографічних систем. Були викладені переваги та недоліки використання зображень, протоколів TCP, IP, VoIP, SCTP та ICMP, а також пакетів VoIP як контейнера.

30

WOZNIAK, Jozef y Krzysztof NOWICKI. "The Need for New Transport Protocols on the INTERNET". AUTOMATYKA, ELEKTRYKA, ZAKLOCENIA 14, n.º 3(53)2023 (30 de septiembre de 2023): 62–82. http://dx.doi.org/10.17274/aez.2023.53.02.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

TThe TCP/IP protocol suite is widely used in IP networks, regardless of diverse environments and usage scenarios. Due to the fact of being the basic concept of organizing the work of the Internet, it is the subject of interest and constant analysis of operators, users, network researchers, and designers. The Internet is a "living" organism in which new needs appear all the time. This is particularly important due to the emerging new application requirements - at the highest level of network architecture, and at the same time, completely new ways of transmitting messages related to new technologies and reception techniques, allowing for parallelization of messages transfer and lossless switching/handover between several interfaces. The paper highlights the expectations and requirements related, in particular, to new "multi-object" applications, as well as the limitations resulting from the high inertia observed on the side of the IP network transport infrastructure. Taking into account both the limitations and the formulated requirements, the selected end-to-end transport protocols have been characterized. More attention was paid to two protocols implementing multi-stream transfers, namely SCTP and QUIC.

31

Bas, Merve, Sibel Daglilar, Nilgun Kuskonmaz, Cevriye Kalkandelen, Gokce Erdemir, Serap E. Kuruca, Dilshat Tulyaganov et al. "Mechanical and Biocompatibility Properties of Calcium Phosphate Bioceramics Derived from Salmon Fish Bone Wastes". International Journal of Molecular Sciences 21, n.º 21 (29 de octubre de 2020): 8082. http://dx.doi.org/10.3390/ijms21218082.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Natural calcium phosphates derived from fish wastes are a promising material for biomedical application. However, their sintered ceramics are not fully characterized in terms of mechanical and biological properties. In this study, natural calcium phosphate was synthesized through a thermal calcination process from salmon fish bone wastes. The salmon-derived calcium phosphates (sCaP) were sintered at different temperatures to obtain natural calcium phosphate bioceramics and then were investigated in terms of their microstructure, mechanical properties and biocompatibility. In particular, this work is concerned with the effects of grain size on the relative density and microhardness of the sCaP bioceramics. Ca/P ratio of the sintered sCaP ranged from 1.73 to 1.52 when the sintering temperature was raised from 1000 to 1300 °C. The crystal phase of all the sCaP bioceramics obtained was biphasic and composed of hydroxyapatite (HA) and tricalcium phosphate (TCP). The density and microhardness of the sCaP bioceramics increased in the temperature interval 1000–1100 °C, while at temperatures higher than 1100 °C, these properties were not significantly altered. The highest compressive strength of 116 MPa was recorded for the samples sintered at 1100 °C. In vitro biocompatibility was also examined in the behavior of osteosarcoma (Saos-2) cells, indicating that the sCaP bioceramics had no cytotoxicity effect. Salmon-derived biphasic calcium phosphates (BCP) have the potential to contribute to the development of bone substituted materials.

32

Aslam, Mudassar, Christian Gehrmann y Mats Björkman. "ASArP: Automated Security Assessment & Audit of Remote Platforms using TCG-SCAP synergies". Journal of Information Security and Applications 22 (junio de 2015): 28–39. http://dx.doi.org/10.1016/j.jisa.2014.09.001.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Kalafat, L. O., N. N. Pirko, A. Ye Demkovych, S. N. Privalikhin, A. N. Rabokon, Ya V. Pirko y Ya B. Blume. "Estimation of genetic diversity for different species of woody plants by intron length polymorphism of beta-tubulin genes". Visnik ukrains'kogo tovaristva genetikiv i selekcioneriv 15, n.º 2 (28 de febrero de 2018): 159–66. http://dx.doi.org/10.7124/visnyk.utgis.15.2.874.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Aim. The effectiveness of using the method of intron length polymorphism of β-tubulin genes is analyzed to evaluate the genetic diversity and polymorphism of tree plants by approbating it for a broad sample of tree plants of different taxonomic positions. Method. The method of estimation intron length polymorphism of β- tubulin (tubulin base polymorphism — TBP-method) has been tested. Results. The molecular genetic profiles and the unique patterns for the Quercus robur L., Populus tremula L., Fagus sylvatica L., Fagus sylvatica f. salicifolia, Robinia pseudoacacia L., Morus alba L., Ulmus glabra Huds., Betula pendula Roth., Acer platanoides L., Acer negundo L., Acer saccharinum Marshall, Catalpa bignonioides Walter, Tilia cordata Mill., Tilia platyphyllos Scop., Aesculus hippocastanum L., Populus nigra L., Juglans regia L., Fraxinus excelsior L., Alnus glutinosa (L.) Gaertn., Ginkgo biloba L. have been created. Some common fragments inherent in individual genera within the family have been found. Conclusions. TBP-method is rather convenient and reliable. It can be used both for molecular genetic marking and for the study of intra- and interspecific polymorphism of economically valuable, horticultural and forest trees.Keywords: TBP-method, β-tubulin introns, tree plants, genetic diversity.

34

Mansour, Mourad y Alhassan G. Mumuni. "Motivations and attitudes toward domestic tourism in Saudi Arabia". European Journal of Tourism, Hospitality and Recreation 9, n.º 1 (1 de mayo de 2019): 27–37. http://dx.doi.org/10.2478/ejthr-2019-0004.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

AbstractBeginning with the establishment of a Supreme Commission for Tourism and Antiquities’ (SCTA) in 2000, there have been official attempts by the government of Saudi Arabia to encourage domestic tourism in order to tap into the huge amounts that Saudis spend annually on vacations. This paper examines the motivations and attitudes of consumers toward tourism destinations and activities within the country (domestic tourism). Using data collected through a structured self-administered questionnaire, the study finds that familiarity and trust of the local environment, perceptions of the safer domestic environment, and limitations imposed by respondents’ vacation timing are the primary motives for choosing to spend their vacations locally, while lack of quality domestic tourist sites and services (including entertainment facilities), lack of tourism information, insufficient tourism organization services, and the harsh local environmental conditions during summer are factors that ‘push’ people from spending the vacations locally. Attitudes toward domestic tourism are generally negative, although there are significant differences in attitudes between respondents who prefer domestic destinations and those who prefer to travel out of Kingdom. Implications of the findings are outlined and discussed.

35

Salic, Kanita, Eveline Gart, Florine Seidel, Lars Verschuren, Martien Caspers, Wim van Duyvenvoorde, Kari E. Wong et al. "Combined Treatment with L-Carnitine and Nicotinamide Riboside Improves Hepatic Metabolism and Attenuates Obesity and Liver Steatosis". International Journal of Molecular Sciences 20, n.º 18 (5 de septiembre de 2019): 4359. http://dx.doi.org/10.3390/ijms20184359.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Obesity characterized by adiposity and ectopic fat accumulation is associated with the development of non-alcoholic fatty liver disease (NAFLD). Treatments that stimulate lipid utilization may prevent the development of obesity and comorbidities. This study evaluated the potential anti-obesogenic hepatoprotective effects of combined treatment with L-carnitine and nicotinamide riboside, i.e., components that can enhance fatty acid transfer across the inner mitochondrial membrane and increase nicotinamide adenine nucleotide (NAD+) levels, which are necessary for β-oxidation and the TCA cycle, respectively. Ldlr −/−.Leiden mice were treated with high-fat diet (HFD) supplemented with L-carnitine (LC; 0.4% w/w), nicotinamide riboside (NR; 0.3% w/w) or both (COMBI) for 21 weeks. L-carnitine plasma levels were reduced by HFD and normalized by LC. NR supplementation raised its plasma metabolite levels demonstrating effective delivery. Although food intake and ambulatory activity were comparable in all groups, COMBI treatment significantly attenuated HFD-induced body weight gain, fat mass gain (−17%) and hepatic steatosis (−22%). Also, NR and COMBI reduced hepatic 4-hydroxynonenal adducts. Upstream-regulator gene analysis demonstrated that COMBI reversed detrimental effects of HFD on liver metabolism pathways and associated regulators, e.g., ACOX, SCAP, SREBF, PPARGC1B, and INSR. Combination treatment with LC and NR exerts protective effects on metabolic pathways and constitutes a new approach to attenuate HFD-induced obesity and NAFLD.

36

Mirani, Fahad Hussain, Pardeep Kumar, M. Suleman Memon, Mairaj N. Bhatti y Wanod Kumar. "Comparative Analysis of TCP, TCP-Vegas, and SCTP in Mobile Ad-Hoc Networks". Journal of Independent Studies and Research Computing 20, n.º 2 (16 de diciembre de 2022). http://dx.doi.org/10.31645/jisrc.22.20.2.7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Mobile Ad hoc Networks (MANET) are a collection of mobiles and smart devices that communicate using wireless links. These types of networks are growing at the best speed and being used at a large scale than before ever because of their high availability and mobility. As the usage scale of MANET devices has been increasing, the challenges have also increased for example the proper delivery of data or information to every mobile node. Traditionally, transmission control protocol(TCP) is used for delivery but it does not fit in all scenarios due to some of its limitations such as network congestion and quick recovery in case of link failure. In this, a comparative analysis of TCP is performed with the stream control transmission protocol (SCTP) and a TCP variant called TCP VEGAS. A number of ad hoc Scenarios are proposed with varying numbers of mobile nodes,i.e 11,21, and 31. The results obtained indicate that SCTP outperforms TCP and VEGAS in throughput. The packet lifetime while using SCTP is also small i.e 0.19 seconds. The link utilization of SCTP is better than TCP and VEGAS. However, TCP increases its link utilization than VEGAS for the nodes in MANET of large delay.

37

Mardiana, Yesi y Julidian Sahputra. "Analisa Performansi Protokol TCP, UDP dan SCTP Pada Lalu Lintas Multimedia". JURNAL MEDIA INFOTAMA 13, n.º 2 (6 de septiembre de 2017). http://dx.doi.org/10.37676/jmi.v13i2.455.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

This study aims to analyze Performance of TCP, UDP and SCTP Protocol on Multimedia Traffic. The TCP (Transmission Control Protocol) protocol, UDP (User Datagram Protocol) and SCTP (Stream Control Transmission Protocol) reside on the same layer in the OSI-Layer at the Transport layer that controls the flow of data, data packets and so on. This research uses windows operating system and Softperfect Network Protocol Analyzer software. Where network analysis software has a complete feature such as can filter almost all the protocol on the OSI-Layer, has a report of easy to read results and so forth. From the test results conducted for three days by analyzing the online and offline way obtained SCTP protocol results both for Multimedia activities but can not be used simultaneously with other activities (such as video conversations). for everyday activities should use TCP and UDP protocol because it tends to be stable.Keyword : TCP, UDP, SCTP

38

Vetaresma, Hemina, Indra Kanedi y Eko Prasetiyo. "ANALISIS DATA VOIP DAN IPTV UNTUK MEMBANDINGKAN KINERJA PROTOKOL TRANSPORT LAYER". GATOTKACA Journal (Teknik Sipil, Informatika, Mesin dan Arsitektur) 1, n.º 2 (30 de diciembre de 2020). http://dx.doi.org/10.37638/gatotkaca.v1i2.122.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Pemanfaatan VOIP dan IPTV semakin banyak digunakan sebagai aplikasi komunikasi pada internet. Analisis dan monitoring lalu lintas VOIP dan IPTV dalam jaringan dengan menggunakan protokol transport layer sangat dibutuhkan untuk mengetahui unjuk kerja protokol yang handal dan cepat dalam proses pengirimannya. Metode penelitian yang digunakan adalah metode eksperimen karena dilakukan percobaan untuk membandingkan kinerja tiga protokol transport layer. Metode pengumpulan data yang digunakan antara lain studi pustaka dan observasi. Untuk membandingkan kinerja ketiga protokol transport layer digunakan software Soft Perfect Network Protocol Analyzer dengan menguraikan karakteristik protokol TCP, UDP, SCTP. Hasil penelitian menunjukkan bahwa protokol TCP memiliki kinerja terbaik bila dibandingkan dengan protokol UDP dan SCTP pada pengiriman data VOIP, sedangkan protokol SCTP memiliki kinerja terbaik bila dibandingkan dengan protokol TCP dan UDP pada pengiriman data IPTV.Kata Kunci : VOIP, IPTP, Protokol Transport layer.

39

Hüseynli, Alisettar, Mehmet Şimşek y M. Ali Akcayol. "Improving QoS in mobile multimedia streaming with SCTP-PQ". Acta Polytechnica 64, n.º 5 (7 de noviembre de 2023). http://dx.doi.org/10.14311/ap.2023.63.0347.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

The Stream Control Transmission Protocol (SCTP) is often the preferred transport layer protocol in streaming applications. This protocol combines the best aspects of Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), but also offers additional features. SCTP supports multihoming and multi-streaming applications and has a congestion mechanism like TCP. Media streaming consists of different types of frames with different levels of importance. For example, I-frames carry more information than B-frames in Moving Picture Experts Group (MPEG). Usually, MPEG frames are processed using the First-In-First-Out (FIFO) algorithm. In this paper, a four-level priority queue integrated protocol named SCTP Priority Queue (SCTP-PQ) has been developed to reduce jitter and delay in real-time multimedia streaming for mobile devices. As part of the development, priority and retransmitted packets are determined on the sending side and these packets are processed faster by using the priority queue on the receiving side. In this way, the average queue delay of priority packets on the receiving side is reduced by 90 % and the throughput values are increased by an average of 10 times. The developed protocol has been extensively tested and compared with SCTP. The results show that the SCTP-PQ outperforms the standard SCTP in terms of jitter and delay.

40

"Comparative Analysis of TCP, UDP and SCTP in Smart Meter Data Transfer". Transactions on Machine Learning and Artificial Intelligence 12, n.º 1 (4 de marzo de 2024). http://dx.doi.org/10.14738/tecs.121.16443.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

"Data Communication and Networking Concepts in User Datagram Protocol (UDP)". International Journal of Recent Technology and Engineering 8, n.º 5 (30 de enero de 2020): 2765–68. http://dx.doi.org/10.35940/ijrte.d8758.018520.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

In most popular standards, the UDP (User datagram protocol plays a vital role in Internet protocol. Normally, in the networking concepts are not required for set up communication between data paths and also the channels.it has used to addressing several different function and also provides data integrity at the source and destination. TCP and SCTP are designed for many applications in the network interface if error free network needed. So that, to improve the performance metrics of teaching learning process, the wireless technology based networking concepts involved major parts.

42

Reswan, Yuza y Dedy Agung Prabowo. "Analisis Perbandingan Kinerja Protokol Transport Layer Pada Lalu Lintas Data VIOP dan IPTV". JSI: Jurnal Sistem Informasi (E-Journal) 9, n.º 2 (10 de octubre de 2017). http://dx.doi.org/10.36706/jsi.v9i2.7988.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

AbstractOne of the use of VOIP and IPTV technology that is increasingly used as a communication application on the internet are video call and video streaming, so when the data required a reliable and fast protocol performance in the process of delivery. The problem of the research is analyzing the performance of layer transport protocol in VOIP and IPTV data traffic. The objective of the research is to know the advantages and disadvantages of VOIP and IPTV data traffic and it is useful to contribute to the development of transport layer protocols in VOIP and IPTV data traffic in the future. This research is conducted independently without related to place and time. This reasearch uses SoftPerfect network Protocol Analyzer software. SoftPerfect network Protocol Analyzer is used to compare the performance of transport layer protocols of TCP, UDP, SCTV based on six parameters using different LAN and Wireless cable, test time, and sharing time. The method used in this research is based on the research approach. The results of this study indicate that SCTV protocol is a protocol that has good performance in VOIP and IPTV data traffic with TCP and UDP protocol.Keywords : Analysis, Performance, TCP, UDP, SCTP, VOIP, IPTV

43

Yunus, Farizah, N.-S. N. Ismail, S. H. Syed Ariffin, A. A. Shahidan, S. K. Syed Yusof, N. Fisal, K. Saleem y A. A. Ahmed. "Proposed Technique for Transport Protocol in Wireless Sensor Network (WSN) for Multimedia Application". Jurnal Teknologi 58, n.º 1 (15 de junio de 2012). http://dx.doi.org/10.11113/jt.v58.2550.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Recently, reliable data transport in wireless sensor network becomes very crucial for real-time application with different application requirements. Real time multimedia application requires large bandwidth and big memory in the network in order to send video data and needs to arrive at destination in time. Data that arrives at the receiver not in time will be discarded and cannot be played because loss recovery through retransmission of data loss may introduce long delays. Therefore, an implementation of transport protocol in wireless sensor network for multimedia application is a challenging task. Traditional protocol likes TCP and UDP cannot directly applied for real-time communication over wireless sensor network because the lack of functions of real-time services and the unique characteristics of sensor node itself. However there is another transport protocol which is the Stream Control Transmission Protocol (SCTP) that provides multi-stream service for single connection. This feature can be applied for video transmission according to the type of frame to be transmitted. Thus, to achieve the high reliability video data delivery, the advantages of multi-streaming features in SCTP with the combination of low data rate wireless sensor networks will be applied for the new proposed transport protocol. Besides that, transport protocol algorithm also allows maximum network lifetime due to the limited operating lifetime of sensor node and multimedia also is a highly power consuming task. Thus, to prolong the lifetime of wireless sensor network, an efficient transport protocol need to support reliable message delivery and provide congestion control in the most energy efficient. This paper focuses on the existing transport protocols for real-time application and the future protocol that provides the entire requirement of transport protocol.

44

Budiardjo, Bagio y Michael Thiotrisno. "SIMULASI PENGUKURAN INTRAFAIRNESS DAN INTERFAIRNESS PROTOKOL-PROTOKOL STREAM CONTROL TRANSMISSION PROTOCOL (SCTP) DAN TRANSMISSION CONTROL PROTOCOL (TCP) PADA JARINGAN UNICAST". MAKARA of Technology Series 7, n.º 2 (14 de octubre de 2010). http://dx.doi.org/10.7454/mst.v7i2.167.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Charfi, Nada, Amal Bouaziz, Sana Omri, Imen Gassara, Rim Feki, Najeh Smaoui, Lobna Zouari, Mohamed Maâlej, Jihène Ben Thabet y Manel Maâlej Bouali. "Evaluation des Troubles Cognitifs Chez des Patients Tunisiens Atteints de Trouble Bipolaire en Rémission : Étude Cas-Témoins: Assessment of Cognitive Impairment in Tunisian Patients With Bipolar Disorder in Remission: A Case-Control Study". Canadian Journal of Psychiatry, 24 de mayo de 2024. http://dx.doi.org/10.1177/07067437241253631.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Abrégé Objectifs Nos objectifs étaient d’évaluer les troubles cognitifs chez des patients bipolaires en rémission comparativement à des témoins sains et d’étudier leur rapport avec les facteurs cliniques et thérapeutiques. Méthodes Il s’agissait d’une étude cas-témoins, menée auprès de patients atteints de trouble bipolaire (TBP) en rémission et de témoins sains appariés. Elle a été réalisée au centre hospitalo-universitaire (CHU) Hédi Chaker de Sfax (Tunisie). L’échelle the Screen for cognitive impairment in psychiatry (SCIP) a été utilisée pour l’évaluation des fonctions cognitives chez les patients et les témoins. Cette échelle se compose des sous-échelles d’apprentissage verbal avec rappel immédiat (VLT-I) et différé (VLT-D), de la mémoire de travail (WMT), de la fluence verbale (VFT) et de la vitesse de traitement de l’information (PST). Résultats Nous avons recruté 61 patients et 40 témoins. Comparés aux témoins, les cas avaient des scores totaux du SCIP et de toutes les sous-échelles du SCIP significativement plus bas (p < 0,001 partout) avec des tailles d’effet modérées à élevées. Dans l’analyse multivariée, la présence de caractéristiques psychotiques était corrélée à l’abaissement des scores du SCIP total (p = 0,001), du VLT-I (p = 0,001) et VLT-D (p = 0,007), du WMT (p = 0,002), et du PST (p = 0,008). Le TBP de type 2 était corrélé à l’abaissement du score de VLT-I (p = 0,023). L’âge de début et la durée d’évolution du trouble étaient corrélés négativement au score PST (p < 10−3 et p = 0,007 respectivement). La polarité maniaque prédominante était corrélée à l’abaissement du score VFT (p = 0,007). Conclusions Notre étude a montré que les patients bipolaires en rémission présentaient des troubles cognitifs touchant différents domaines cognitifs, significativement plus marqués que chez les témoins. Ces troubles cognitifs semblent être liés à des facteurs cliniques et thérapeutiques considérés eux-mêmes comme des facteurs de mauvais pronostic de la maladie bipolaire.

46

Krishnasamy, Senthilkumar, Thitinun Ungtrakul, Chandrasekar Muthukumar, Senthil Muthu Kumar Thiagamani, Jyotishkumar Parameswaranpillai, H. Mohit, Dhandapani Aravind, Rajini Nagarajan, Suchart Siengchin y Varagunapandiyan Natarajan. "Analysis of the thermal properties in short sansevieria cylindrica fibre/PLA composites processed by twin screw extruder followed by hot press molding technique". Materials Research Express, 12 de marzo de 2024. http://dx.doi.org/10.1088/2053-1591/ad32ea.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Abstract Short Sansevieria cylindrica fibre/polylactic acid composites (SCFP) were fabricated using a twin screw extruder followed by the hot press technique, with variations in fibre loadings of 10wt.%, 20wt.%, 30wt.% and 40wt.%. The thermal properties of SCFP were assessed through dynamic mechanical analysis (DMA), thermomechanical analysis (TMA), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Notably, the samples loaded with 40wt.% of fibre exhibited an increased storage modulus. In terms of loss modulus, the fibre-loaded samples displayed high values, indicating more heat is released during DMA experiment. Interestingly, the composite trend did not solely rely on increasing fibre loading, highlighting the intricate interplay between reinforcement and matrix crucial for determining viscoelastic properties across various temperatures. The TGA results revealed a decrease in inflection temperature with increasing fibre loadings, accompanied by a proportional rise in residues. The DSC thermograms indicated minimal differences in Tg, Tcc, and Tm values among composites with varying fibre loadings. However, neat PLA showed slightly higher values than the composites. On the other hand, reinforcing SCF into the PLA matrix promoted the crystallization of PLA by 1 – 3% with the maximum degree of crystallinity of 25.4% obtained for 30 wt.% of SCFP.

47

Rubiera, Marta, Vanessa Carvalho, Sandra Bonet, Alan Flores, Daniel Carcamo, Miguel Lemus, Pilar Coscojuela et al. "Abstract W MP24: Improving Collateral Circulation Evaluation Accuracy: Multiphase CTA on Acute Stroke". Stroke 46, suppl_1 (febrero de 2015). http://dx.doi.org/10.1161/str.46.suppl_1.wmp24.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Good collateral circulation (CC) associates favourable outcomes on acute stroke patients, but which is the best technique to evaluate it is controversial. Single-phase CTA (sCTA) is widely used, but lacks of temporal resolution, and may mislabel CC. We aim to evaluate a new, quick (not post processing), time resolved technique to evaluate CC: multiphase CTA (mCTA). METHODS: Consecutive <4.5h stroke patients evaluated for reperfusion therapies with confirmed M1-MCA or TICA occlusion by sCTA were included. Two more cerebral CTA acquisitions with 10 and 20 seconds delay were performed for mCTA. CC evaluation is described in the Table. sCTA and mCTA were compared as predictors of clinical, radiological and functional endpoints. Recanalization (REC) was assessed by TCD at 24h. RESULTS: 78 patients were included. Mean age: 66.3±13.6y, median NIHSS 17.5 (IQR 6.3), 52 (66.7%) M1- and 26 (33.3%) TICA-occlusions. Mean time from onset to CTA: 2:32±1:31h. On sCTA, 61.8% patients presented good CC whereas on mCTA, 54.7%. Only on mCTA good CC was an independent predictor of low infarct volume at 24h (OR 3.6, CI 95% 1.3-10.5, p=0.017). Moreover, only mCTA-CC status was associated with lower 24h median NIHSS (good CC:5 vs poor CC:17, p<0.001), and 3 months favourable outcome (mRS0-2: good CC 57.1% vs poor CC 11.5%, p<0.001). Association with outcome was especially significant in patients without REC: among poor CC patients, mRS0-2: 0% in non REC Vs 50% in REC (p<0.01). In a logistic regression model including age, NIHSS, ASPECTS and REC, only good CC on mCTA predicted favourable outcome (OR 6.8, CI 95% 1.6-29.2, p=0.009). CONCLUSION: CC evaluation on mCTA improves accuracy of clinical and radiological endpoints as compared with sCTA. Good CC on mCTA is an independent predictor of low infarct volume and good outcome, especially if REC is not achieved.

48

Severe, Jennifer, Paul N. Pfeiffer, Katherine Palm-Cruz, Theresa Hoeft, Rebecca Sripada, Matthew Hawrilenko, Shiyu Chen y John Fortney. "Clinical Predictors of Engagement in Teleintegrated Care and Telereferral Care for Complex Psychiatric Disorders in Primary Care: a Randomized Trial". Journal of General Internal Medicine, 2 de febrero de 2022. http://dx.doi.org/10.1007/s11606-021-07343-x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Abstract Background Telepsychiatry Collaborative Care (TCC) and Telepsychiatry/Telepsychology Enhanced Referral (TER) expand the reach of specialty mental health services to underserved populations. Objective Assess clinical predictors of treatment engagement for complex psychiatric conditions in TCC—in which remote specialists consult with primary care teams via an onsite care manager who also provides brief psychotherapy—and TER, in which remote specialists provide direct telehealth treatment. Design A randomized pragmatic trial from twenty-four primary care clinics without onsite psychiatrists or psychologists. Participants A total of 1,004 adult patients screened positive for posttraumatic stress disorder (PTSD)and/or bipolar disorder were randomized to receive TCC or TER for 1 year. Main Measures Psychotherapy engagement was measured by the number of sessions completed, and pharmacotherapy engagement by the medication adherence item from the Schizophrenia Care and Assessment Program Health Questionnaire (SCAP-HQ). Key Results Engagement in TCC psychotherapy visits was greater compared to TER. There was no association between the PTSD symptom severity and treatment engagement. The internal state scale (ISS) activation subscale, an indicator of mania, was associated with reduced odds of initiating psychotherapy (odds ratio [OR] = 0.70; 95% CI, 0.59 to 0.84) but not the number of sessions attended once psychotherapy started. The Drug Abuse Screening Test-10(DAST-10) score was associated with receipt of fewer psychotherapy sessions (incidence ratio rate [IRR] = 0.88; 95% CI, 0.81 to 0.95). The number of physical health comorbidities was associated with greater engagement in psychotherapy (IRR = 1.11, 95% CI, 1.03 to 1.19) and pharmacotherapy (OR = 1.54; 95% CI, 1.27 to 1.87). None of the findings varied by intervention group. Conclusions Both teleintegrated and telereferral care offer an opportunity to treat patients with complex psychiatric conditions. While there was no difference in clinical characteristics predicting engagement, onsite care managers engaged patients in more psychotherapy sessions than remote therapists. Trial Registration ClinicalTrials.gov Identifier: NCT02738944

49

Xing, Kai, Huatao Liu, Fengxia Zhang, Yibing Liu, Yong Shi, Xiangdong Ding y Chuduan Wang. "Identification of key genes affecting porcine fat deposition based on co-expression network analysis of weighted genes". Journal of Animal Science and Biotechnology 12, n.º 1 (20 de agosto de 2021). http://dx.doi.org/10.1186/s40104-021-00616-9.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Resumen

Abstract Background Fat deposition is an important economic consideration in pig production. The amount of fat deposition in pigs seriously affects production efficiency, quality, and reproductive performance, while also affecting consumers’ choice of pork. Weighted gene co-expression network analysis (WGCNA) is effective in pig genetic studies. Therefore, this study aimed to identify modules that co-express genes associated with fat deposition in pigs (Songliao black and Landrace breeds) with extreme levels of backfat (high and low) and to identify the core genes in each of these modules. Results We used RNA sequences generated in different pig tissues to construct a gene expression matrix consisting of 12,862 genes from 36 samples. Eleven co-expression modules were identified using WGCNA and the number of genes in these modules ranged from 39 to 3,363. Four co-expression modules were significantly correlated with backfat thickness. A total of 16 genes (RAD9A, IGF2R, SCAP, TCAP, SMYD1, PFKM, DGAT1, GPS2, IGF1, MAPK8, FABP, FABP5, LEPR, UCP3, APOF, and FASN) were associated with fat deposition. Conclusions RAD9A, TCAP, SMYD1, PFKM, GPS2, and APOF were the key genes in the four modules based on the degree of gene connectivity. Combining these results with those from differential gene analysis, SMYD1 and PFKM were proposed as strong candidate genes for body size traits. This study explored the key genes that regulate porcine fat deposition and lays the foundation for further research into the molecular regulatory mechanisms underlying porcine fat deposition.

Artículos de revistas sobre el tema "SCTP / TCP"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros