ip network
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2022 ◽  
Vol 70 (1) ◽  
pp. 169-206
Author(s):  
Slađan Svrzić ◽  
Julijan Bojanov

Introduction/purpose: To specify the practical application of ECMA355 and ECMA-336 Standards for Q-SIG tunneling and the implementation of mapping functions via the existing IP (Internet Protocol) network of the Serbian Armed Forces (Intranet SAF), in the Private Automatic Telephone Network SAF (PATN SAF), as the main part of the Private telecommunication-information networks of integrated services SAF (PISN SAF). Methods: Description of the implemented solution and analysis of the software parameters of the established transmission SIP route, with the display of the results obtained in the fight with jitter and echo in the network. Results: With such a solution, it was achieved that participants from the peripheral parts of the PISN SAF, which operate on the principle of transmission and circuit switching by TDM (Time Division Multiplexing), can connect with each other via the newly established central IP network SAF (Core network) which operates on the principle of transmission and switching packets with the SIP (Session Initiation Protocol), without losing the functionality of QSIG from the framework of the digital telecommunication network of integrated services ISDN (Integrated Services Digital Network). Conclusion: The article deals with the modern IP PINX (Private Integrated Services Network Exchange) manufactured by Mitel, type MX-ONE Service Node 6.0, which is implemented at the transit level PATN SAF and which successfully implements the process of tunneling Q-SIG through the IP network and the necessary functions for mapping the transmission of tunneled QSIG messages and mapping voice (and other audio) information to VoIP (Voice over IP) communication media streams through that network. Also, the basic elements for its software preparation during the introduction of a new SIP route, with a capacity of 30 IP trunks in a transmission beam realized with 100 Mb/s-T Ethernet, are given, and the fight with the present jitter and echo in the network is described. Finally, the paper presents the experience-based values of the parameters for reducing the influence of jitter and suppressing echo.


Author(s):  
Pedro Casas ◽  
Matteo Romiti ◽  
Peter Holzer ◽  
Sami Ben Mariem ◽  
Benoit Donnet ◽  
...  
Keyword(s):  

2021 ◽  
Vol 11 (21) ◽  
pp. 10504
Author(s):  
Tabinda Ashraf ◽  
Steven S. W. Lee ◽  
Muhammad Iqbal ◽  
Jen-Yi Pan

Distributed link-state routing protocols, including Open Shortest Path First (OSPF) and Intermediate System–Intermediate System (IS-IS), have successfully provided robust shortest path routing for IP networks. However, shortest path routing is inflexible and sometimes results in congestion on some critical links. By separating the control plane and the data plane, the centralized control of Software Defined Networking (SDN)-based approach possesses flexible routing capabilities. Fibbing is an approach that can achieve centralized control over a network running distributed routing protocols. In a Fibbing-controlled IP network, the controller cleverly generates fake protocol messages to manipulate routers to steer the flow of the desired paths. However, introducing fake nodes destroys the structure of the loop-free property of Loop-Free Alternate (LFA) that is used to achieve fast failure recovery in IP networks. This paper addresses this issue and presents a solution to provision routing paths so a Fibbing network can still apply LFA in the network. The proposed network jointly considers load-balanced and fast failure recovery. We formulate the problem as an integer linear programming problem. The numerical results reveal that the proposed method can provide 100% survivability against any single node or single link failure.


Author(s):  
Martono Dwi Atmadja

Abstract: VoIP technology is equipped with several functions, namely, the signalling function, meaning the VoIP is in charge of receiving the network from the caller, after which the conversation delivered. This technology is capable to pass voice traffic in the form of packets over an IP network. Packets of sound undergo a long process or delay to get to the destination it can damage the voice’s quality being heard. It happened because there is continuous delay in the communication between IP phone set on VoIP technology that causes echo in the receiver’s voice. Echo can occur during communication with IP phone set with average delay capacity above 5ms. The delay on the delivery and reception as in the results of communication between telephones can be adjusted for sound frequency of 300 Hz to 1000 Hz as a cut off by adding High Pass Filter (HPF) application. HPF filter application is able to stabilize the amplitude of about -21 dBm from the set of transmission test on the receiver when there is weakening at low frequencies, but when the frequency is raised to 1500-2250 Hz the amplitude strengthens to -12,2 dBm or increases the value of about 8.8 dB. Meanwhile, for the lower frequency such as 300 – 950 Hz, the filter would not pass it since the frequency is designed to be cut-off at 1000 Hz. The value of delay is narrower to 0.08ms by HPF application at the frequency of sound upper limit received by any 1000-3400 Hz telephone set. Keywords: VoIP technology, echo cancelling, HPF filter, delay, voice quality


2021 ◽  
Vol 11 (1) ◽  
pp. 88-103
Author(s):  
Bayu Widodo

ABSTRACTIn IP-based networks with many users, a bandwidth usage regulation mechanism is needed to ensure service quality. Mikrotik RouterOS has a feature to run QoS known as queue. RouterOS uses the Hierarchichal Token Bucket (HTB) method as the main queue method. The results of the tests carried out show that HTB is able to provide traffic limitation facilities for each classification and guarantee or ensure the amount of bandwidth is less or equal to the predetermined amount. If there is unused bandwidth it can be used by a lower classification (borrowing mechanism).


Author(s):  
Songzhu Zhang ◽  
Xingwei Wang ◽  
Jianhui Lv ◽  
Min Huang
Keyword(s):  

2021 ◽  
pp. 47-50
Author(s):  
Abdullatif Y. M. Alhatem

At the present time the smart technology enhanced to be utilized for the human life in many elds, especially in the houses. The building automation experienced a rapid growth in techniques and methods to provide an advanced management for operational advantages in buildings and develop the equipment in the houses to the consumption of energy and operation. When the KNX system has been developed to be the most important building automation, the ethernet system has evolved to be global communication system and use it as automation system. Among the various technological developments is IoT, which is the essential development the future achievement via the internet techniques, Meanwhile the different available communication mediums of KNX and the need of utilizing IP network in compiling extensive areas of KNX has led us to conduct this comparison.


Author(s):  
Akash R. Kathavate ◽  
Bhanu Priya ◽  
Rajeshwari Hegde ◽  
Sharath Kumar

Pursuit for a new feasible technology has always been the main intention of every telecom company to satisfy the dire needs of the increasing demand for higher data rates and uninterrupted communication. The Fourth Generation (4G) network deployed presently works on an All-IP Network architecture providing features like low latency and high data rates. Owing to many user applications which make use of constant internet connection and high data rate, 5G was launched. Keeping in line with current trends, user preferences, and requirements, technology standards have evolved from 1G, 2G, 3G, 4G, and now 5G. Thus, 5G mobile technology makes use of Flat-IP Network architecture which fulfills the need for high data rates and ultra low latency thus providing overall latency. Thus, this paper intends to discuss the various performance parameters, necessities, evolutionary enhancements, the shift in the architecture and protocols involved from 4G to 5G to achieve a full real wireless world, and also about the spectrum management and challenges.


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