scholarly journals Interoperability and Reliability of Multiplatform MPLS VPN: Comparison of Traffic Engineering with RSVP-TE Protocol and LDP Protocol

2017 ◽  
Vol 11 (2) ◽  
pp. 57
Author(s):  
Nanang Ismail ◽  
Eki Ahmad Zaki ◽  
Muhamad Arghifary
Keyword(s):  
Packet Loss ◽  
Traffic Engineering ◽  
Load Condition ◽  
Traffic Load ◽  
Average Delay ◽  
Traffic Condition ◽  
The Third ◽  
Mpls Vpn ◽  
Stable Network ◽  
Network Scalability

One of the alternatives to overcome network scalability problem and maintaining reliability is using MPLS VPN network. In reallity, the current network is already using a multiplatform of several different hardware vendors, i.e., Cisco and Juniper platforms. This paper discusses the comparison of the simulation results to see interoperability of multiplatform MPLS VPN andreliability through traffic engineering using RSVP-TE and LDP protocols. Both the RSVP and LDP protocols are tested on a stable network and in a recovery mode,as well as non-load conditions and with additional traffic load. The recovery mode is the condition after the failover due to termination of one of the links in the network. The no-load condition means that the network is not filled with additional traffic. There is only traffic from the measurement activity itself. While network conditions with an additional load are conditions where there is an additional UDP packet traffic load of 4.5 Mbps in addition to the measurement load itself. On a stable network and without additional traffic load, the average delay on LDP protocol is 59.41 ms, 2.06 ms jitter, 0.08% packetloss, and 8.99 Mbps throughput. Meanwhile, on RSVP protocol, the average delay is 52.40 ms, 2.39 ms jitter, 12.18% packet loss, and 7.80 Mbps throughput. When failover occurs and on recovery mode, LDP protocol is48% of packet loss per 100 sent packets while on RSVP packet loss percentage is 35.5% per 100 sent packets. Both protocols have interoperability on the third layer of multiplatform MPLS VPN, but on heavy loaded traffic condition, RSVP protocol has better reliability than the LDP protocol.

scholarly journals Architecture and Performance Evaluation of a Novel Optical Packet Switch with Input Concentrators

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 510
Author(s):  
Hongzhen Yang ◽  
Xiuwei Mao ◽  
Zilu Fang ◽  
Wanke Chen ◽  
Ting Wang ◽  
...  
Keyword(s):  
Packet Loss ◽  
Cost Savings ◽  
Economic Cost ◽  
Packet Delay ◽  
Traffic Load ◽  
Buffer Size ◽  
Wavelength Converters ◽  
Single Output ◽  
Optical Packet Switch ◽  
Packet Switch

In this paper, we propose a novel optical packet switch (OPS) architecture with input concentrators, which employ multi-input single-output optical buffers to aggregate all the incoming traffic into a small size switching fabric. Accordingly, the physical size, the number of the needed wavelength converters, and the economic cost of the total OPS node are decreased dramatically. However, the deployment of input concentrators introduces additional packet loss and delay, except from the contention at the switch output. A Markov model is presented to study the packet loss ratio (PLR) and average packet delay given by the input concentrators. The corresponding closed form expressions are given. The model also demonstrates that the system performance can be greatly improved by increasing the buffer size when the traffic load is not larger than 0.69315. The analytical values are compared with the simulation results. All the obtained results show that the proposed model provides satisfactory approximations under different network scenarios. Moreover, the economic cost savings of the proposed OPS node at the present time and its evolution as a function of time are also discussed in detail. The proposed architecture can also be applied in a packet enhanced optical transport network (OTN).

scholarly journals PARD: Hybrid Proactive and Reactive Method Eliminating Flow Setup Latency in SDN

2020 ◽  
Vol 28 (4) ◽  
pp. 1547-1574
Author(s):  
Michal Rzepka ◽  
Piotr Borylo ◽  
Artur Lason ◽  
Andrzej Szymanski
Keyword(s):  
Packet Loss ◽  
Traffic Engineering ◽  
Hardware Design ◽  
Software Defined Networking ◽  
Fine Grained ◽  
Flow Table ◽  
Scientific Papers ◽  
Reactive Method ◽  
Full Maturity

Abstract Advantages of Software Defined Networking are unquestionable and are widely described in numerous scientific papers, business white papers and press articles. However, to achieve full maturity, crucial impediments to this concept and its shortcomings must be overcame. One of the most important issues regards significant setup latency of a new flow. To address this issue we propose PARD: a hybrid proactive and reactive method to manage flow table entries. Additional advantages of the proposed solution are, among the others, its ability to preserve all capabilities of Software Defined Networking, utilization of multiple flow tables, a possibility to employ fine-grained traffic engineering and, finally, compatibility with existing protocol and hardware design. It is shown that the proposed solution is able to significantly reduce latency of first packets of a new flow, which directly impacts packet loss and perceived throughput. Thus, our solution is expected to enable a wide deployment of Software Defined Networking concept without any need for protocol changes or, what is extremely important, hardware modifications.

Simulation Research on EDF Scheduling Algorithm of CAN Network Based on OPNET

2012 ◽  
Vol 433-440 ◽  
pp. 5102-5106
Author(s):  
Jie Chang Wu ◽  
Jia Hao ◽  
Chao You Guo
Keyword(s):  
Real Time ◽  
Normal Load ◽  
Scheduling Algorithm ◽  
Load Condition ◽  
Transmission Delay ◽  
Data Frame ◽  
Average Delay ◽  
Real Time System ◽  
Simulation Research ◽  
Set Up

In order to analyze and evaluate real-time performance of CAN network, the OPNET models of CAN network with Fixed Priority Scheduling (FPS) and Earliest Deadline First (EDF) have been set up in this paper. Based on simulation experiments, the performances of average delay and transmission success ratio in the two models are analyzed and the experiments also indicate that under normal load condition the two scheduling algorithm both can send data frame successfully before the deadline. In a slight overload condition FPS algorithm makes the transmission delay of low priority data frame significantly increased, and even occurs the phenomenon that low priority data frame can not be sent at all times; while the EDF algorithm can make all the nodes to complete the data frames in less than 3ms transmission delay, it meets the delay requirements that are delay should less than 10ms in most control systems, it indicates that EDF algorithm has the better scheduling and availability in soft real-time system.

Experimental Research on Diffserv-Aware MPLS Traffic Engineering

2012 ◽  
Vol 263-266 ◽  
pp. 1858-1863
Author(s):  
Jin He Zhou ◽  
Guo Min Xia
Keyword(s):  
Quality Of Service ◽  
Experimental Research ◽  
Packet Loss ◽  
Traffic Engineering ◽  
High Performance ◽  
Loss Rate ◽  
Differentiated Services ◽  
Packet Loss Rate ◽  
Differentiated Service

Diffserv-aware and Traffic Engineering combine the advantages of MPLS, Traffic Engineering (TE) and Differentiated Services (Diffserv, DS) to provide high performance and Quality of Service(QoS) in networks. We have designed three scenarios on Juniper Networks platforms to analyze the packet loss rate and delay for video, voice and data. The results show that MPLS DS-TE can improve the QoS for differentiated service effectively. The research has practical value for the development of DS-TE based on MPLS.

Several Contention Window Adjustment Techniques for Improving Unsaturated throughput of Wireless LANs

2014 ◽  
Vol 931-932 ◽  
pp. 952-956
Author(s):  
Jesada Sartthong ◽  
Suvepon Sittichivapak ◽  
Nitthita Chirdchoo
Keyword(s):  
Load Condition ◽  
Window Size ◽  
Traffic Load ◽  
Contention Window ◽  
Area Network ◽  
Chain Model ◽  
Function Concept ◽  
Contention Window Size ◽  
Comparison Results ◽  
Size Adjustment

This paper proposes the several contention window adjustment schemes in backoff process as well-known backoff algorithm (BA) for improving the performance of wireless local area network (WLAN). In addition, this research introduces a new unsaturated discrete Markov chain model in fixed backoff stages and fixed contention window sizes technique (FBFC). The proposed contention window adjustment schemes are designed by applying the moment generating function concept in random variable and process theorem. Unsaturated throughput parameters are used to compare the performance of all contention window size adjustment techniques based on IEEE802.11b WLAN standards. The comparison results show that Bernoulli and Double adjustment schemes are good contention window size adjustments at light traffic load, and the Even contention window size adjustment operates well at high traffic load condition.

scholarly journals Analysis Quality of Service Wireless LAN at University PGRI Yogyakarta

2018 ◽  
Vol 6 (1) ◽  
pp. 9
Author(s):  
Nur Kukuh Wicaksono ◽  
Bambang Sugiantoro
Keyword(s):  
Quality Of Service ◽  
Packet Loss ◽  
Wireless Lan ◽  
Educational Institution ◽  
The Internet ◽  
Average Delay ◽  
Observation Methods ◽  
The University ◽  
Internet Network

PGRI University of Yogyakarta is an educational institution that uses the internet as one of the supporting facilities and infrastructures to manage and organize the data and information used by the student to find references about the lecture. PGRI University Yogyakarta has three buildings on the main campus building A building B and C buildings, where each building using wireless LAN as a means for students to use the internet network, the weakness of the wireless LAN network where poor internet network in the wireless LAN network. Thus the researchers wanted to analyze the Quality of Service wireless LAN networks in building A, building B, and C buildings, in each floor.With the existence of quality of the network at PGRI University of Yogyakarta will be done by interviews and observation methods, problems that occur in wireless LAN networks in each building have been prepared in advance, after which it will do an analysis of wireless LAN networks using quality of service parameters, namely delay, packet loss, bandwidth, throughput and factors that influence the wireless network at the University of PGRI Yogyakarta.The results of the measurement and monitoring of Quality of Service wireless LAN at PGRI University of Yogyakarta in building A, building B, C on each floor of the building can be classified in the category of poor with the average delay for each building to around 150 ms and packet loss = 28%, bandwidth = 173523 bits / s and throughput = 22%, and the factors that occurred in the signal range cannot cover every room in every building. From these results it can be concluded that the quality of the wireless LAN at the University PGRI Yogyakarta according to the TIPHON standards categorized as poor.

scholarly journals PENERAPAN PROTOKOL MQTT PADA TEKNOLOGI WAN (STUDI KASUS SISTEM PARKIR UNIVERISTAS BRAWIJAYA)

2017 ◽  
Author(s):  
Galih Yudha Saputra ◽  
Ahimsa Denhas Afrizal ◽  
Fakhris Khusnu Reza Mahfud ◽  
Farid Angga Pribadi ◽  
Firman Jati Pamungkas
Keyword(s):  
Packet Loss ◽  
Average Delay

MQTT merupakan sebuah protokol yang diterapkan pada IOT. Protokol ini sangat mendukung untuk jaringan WAN, karena WAN mencakup area yang luas. Protokol MQTT mempunyai kelebihan yaitu dapat bekerja dengan energi dan media penyimpanan yang minimum. Jaringan pada sistem informasi parkir yang ada saat ini kebanyakan hanya bersifat LAN. Oleh karena itu pada penelitian ini sistem informasi parkir dikembangkan dengan menggunakan protokol MQTT yang diterapkan pada jaringan WAN. Berdasarkan hasil simulasi penelitian ini protokol MQTT dapat diterapkan pada teknologi WAN dengan average delay sebesar 0.028183014 second membuktikan bahwa protokol MQTT mempunyai kualitas yang baik berdasarkan parameter nilai delay. Selain itu packet loss dari publisher ke server pada protokol MQTT yaitu sebesar 0%, hal ini membuktikan bahwa akurasi pengiriman pada MQTT adalah 100%.

scholarly journals Penerapan Protokol MQTT Pada Teknologi Wan (Studi Kasus Sistem Parkir Univeristas Brawijaya)

2017 ◽  
Vol 12 (2) ◽  
pp. 69 ◽  
Author(s):  
Galih Yuda Saputra ◽  
Ahimsa Denhas Afrizal ◽  
Fakhris Khusnu Reza Mahfud ◽  
Farid Angga Pribadi ◽  
Firman Jati Pamungkas
Keyword(s):  
Packet Loss ◽  
Average Delay

MQTT merupakan sebuah protokol yang diterapkan pada IOT. Protokol ini sangat mendukung untuk jaringan WAN, karena WAN mencakup area yang luas. Protokol MQTT mempunyai kelebihan yaitu dapat bekerja dengan energi  dan media penyimpanan yang minimum. Jaringan pada sistem informasi parkir yang ada saat ini kebanyakan hanya bersifat LAN. Oleh karena itu pada penelitian ini sistem informasi parkir dikembangkan dengan menggunakan protokol MQTT yang diterapkan pada jaringan WAN. Berdasarkan hasil simulasi penelitian ini protokol MQTT dapat diterapkan pada teknologi WAN dengan average delay sebesar 0.028183014 second membuktikan bahwa protokol MQTT mempunyai kualitas yang baik berdasarkan parameter nilai delay. Selain itu packet loss dari publisher ke server pada protokol MQTT yaitu sebesar 0%, hal ini membuktikan bahwa akurasi pengiriman pada MQTT adalah 100%.

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