Optimizing VoIP server resources using linear programming model and autoscaling technique: An SDN approach

Montazerolghaem, Ahmadreza

doi:10.1002/cpe.6424

Cited by 5 publications

(2 citation statements)

References 36 publications

(55 reference statements)

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“…Montazerolghaem [ 47 ] addressed the critical problem of SIP server-resource exhaustion in SIP-based networks arising from distributed routing and network management. Their proposed SDN-based framework aims to optimize SIP server resources in VoIP networks.…”

Section: Related Workmentioning

confidence: 99%

Performance analysis: Securing SIP on multi-threaded/multi-core proxy server using public keys on Diffie–Hellman (DH) in single and multi-server queuing scenarios

Bhatti,

Sidrat,

Saleem

et al. 2024

PLoS ONE

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The rapid replacement of PSTN with VOIP networks indicates the definitive phase-out of the PBX/PABX with smartphone-based VOIP technology that uses WLAN connectivity for local communication; however, security remains a key issue, regardless of the communication coverage area. Session initiation protocol (SIP) is one of the most widely adopted VOIP connection establishment protocols but requires added security. On the Internet, different security protocols, such as HTTPS (SSL/TLS), IPSec, and S/MIME, are used to protect SIP communication. These protocols require sophisticated infrastructure and some pose a significant overhead that may deteriorate SIP performance. In this article, we propose the following: i) avoid using Internet bandwidth and complex Internet protocols for local communication within an organization, but harness WLAN connectivity, ii) use multi-threaded or multicore computer systems to handle concurrent calls instead of installing hardware-based SIP servers, and iii) run each thread in a separate core. Cryptography is a key tool for securely transmitting confidential data for long- and short-range communication, and the Diffie-Hellman (DH) protocol has consistently been a popular choice for secret key exchanges. Primarily, used for symmetric key sharing, it has been proven effective in generating public/private key pairs, sharing public keys securely over public channels, and subsequently deriving shared secret keys from private/public keys. This key exchange scheme was proposed to safeguard VOIP communication within WLANs, which rely on the SIP for messaging and multimedia communication. For ensuring an efficient implementation of SIP, the system was rigorously analyzed using the M/M/1 and M/M/c queuing models. We analyze the behavior of SIP servers with queuing models with and without end-to-end security and increase users’ trust in SIP security by providing a transparent sense of end-to-end security as they create and manage their private and public keys instead of relying on the underlying SIP technology. This research implements instant messaging, voice conversation, and secret key generation over DH while implementing and observing the role of multi-threading in multiqueue systems that serve incoming calls. By increasing the number of threads from one to two, the SIP response time improved from 20.23809 to 0.08070 min at an arrival rate of 4250 calls/day and a service rate of three calls/min. Similarly, by adding one to seven threads, the queue length was reduced by four calls/min. Implementing secure media streaming and reliable AES-based signaling for session confidentiality and integrity introduces a minor 8-ms tradeoff in SIP service performance. However, the advantages of implementing added security outweigh this limitation.

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Section: Related Workmentioning

confidence: 99%

Performance analysis: Securing SIP on multi-threaded/multi-core proxy server using public keys on Diffie–Hellman (DH) in single and multi-server queuing scenarios

Bhatti,

Sidrat,

Saleem

et al. 2024

PLoS ONE

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“…The technique can achieve low delay requirements for particular applications and monitor the degree of congestion at each node in the network. Montazerolghaem 36 introduced an SDN‐based resource management architecture for session initiation protocol (SIP) voice over IP (VoIP) networks that controls overload and energy consumption. The author offers a mathematical model of SIP servers' optimal resource allocation problem with a mechanism to control the energy by scaling the resources up and down.…”

Section: Related Workmentioning

confidence: 99%

Design of an optimized traffic‐aware routing algorithm using integer linear programming for software‐defined networking

Eissa

Azim

Ata

2023

Int J Communication

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Summary The number of internet users and connected devices has dramatically expanded due to the recent technological boom and the benefits that the internet of things offers to ease our lives. Network scheduling, quality of service, resource allocation, and security issues are now being addressed via software‐defined networking (SDN). SDN has several benefits over traditional networks, including global centralized control, managing network traffic, and separating the forwarding and control plane. The work done in this paper aims to design and implement a traffic‐aware routing framework based on routing optimization presented as an integer linear programming (ILP) to improve heterogeneous traffic flows' quality of service (QoS) in a simulated SDN environment. With the knowledge that the routing problem is a nondeterministic polynomial‐time‐hard problem, the proposed scheme aims to decrease the computational routing time to make the ILP‐based routing system more suitable for real‐time processing. The simulation results illustrate that the proposed framework reduces the computational time by 23% and 49% for Abilene and Goodnet topology, respectively. Additionally, with 1000 flows in the network, the suggested scheme reduces the number of network flows that violate the QoS by 9% and 22% (with Abilene topology) and 16% and 51% (with Goodnet topology) as compared to the existing shortest path delay and sway methods, respectively.

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Softwarization and virtualization of VoIP networks

Montazerolghaem

2022

J Supercomput

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Optimizing VoIP server resources using linear programming model and autoscaling technique: An SDN approach

Cited by 5 publications

References 36 publications

Performance analysis: Securing SIP on multi-threaded/multi-core proxy server using public keys on Diffie–Hellman (DH) in single and multi-server queuing scenarios

Performance analysis: Securing SIP on multi-threaded/multi-core proxy server using public keys on Diffie–Hellman (DH) in single and multi-server queuing scenarios

Design of an optimized traffic‐aware routing algorithm using integer linear programming for software‐defined networking

Softwarization and virtualization of VoIP networks

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