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

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

Sistem Monitoring Suhu dan Kelembapan secara Nirkabel pada Budidaya Tanaman Hidroponik

Penelitian ini membahas sistem monitoring suhu dan kelembapan secara nirkabel dengan Xbee berbasis mikrokontroler yang dilakukan di tempat budidaya tanaman hidroponik. Mikrokontroler berfungsi sebagai pengontrol rangkaian elektronik yang dapat menyimpan program. Xbee berfungsi sebagai alat komunikasi nirkabel yang beroperasi pada frekuensi 2,4 Ghz dengan jarak jangkau mencapai 1.500 meter. Pada perancangan ini terdapat dua node, yaitu node pengirim dan node penerima. Node pengirim terdiri dari modul Arduino sebagai pengendali yang dihubungkan dengan sensor DHT11 sebagai masukan dan Xbee sebagai pengirim. Node penerima terdiri dari Xbee penerima yang dihubungkan pada modul Arduino sebagai pengolah data dan LCD untuk menampilkan data. Pada penelitian ini didapat hasil perbandingan sensor DHT11 dengan alat ukur Thermo-Hygro yaitu rata-rata error suhu 0,75℃ dan kelembapan 3%. Hasil pengujian empat unit sensor DHT11 di luar ruangan didapat nilai rata-rata suhu sebesar 28,94℃ dan kelembapan sebesar 59,6% dengan jarak jangkau Xbee mencapai 240 meter, sedangkan nilai rata-rata suhu dan kelembapan hasil pengujian di dalam ruangan yaitu 29,14℃ dan 58,86% dengan jarak jangkau Xbee mencapai 70 meter

Experimental investigation on flexure and impact properties of injection molded polypropylene-nylon 6-glass fiber polymer composites

In this research study, glass fiber (GF) reinforced polypropylene (PP)-nylon 6 (PA6) polymer blend composites were prepared using injection molding process. Specimens of four different compositions such as 80%PP+20%PA6, 80%PP+18%PA6+2%GF, 80%PP+16%PA6+4%GF and 80%PP+14%PA6+6%GF were prepared. In the injection molding process, suitable process parameters were selected depending on the type of composite specimen in producing defects free dog bone shaped specimens. Flexure and impact tests were carried out according to ASTM standard. The important flexure properties such as flexural modulus, flexural yield strength, flexural strength and flexural strain were investigated. The obtained results revealed that flexural modulus of 80%PP+20%PA6 polymer blend is the lowest and the polymer blend composite shows steadily improved modulus as the glass fiber content is increased. Results also showed that flexural strength of pure polymer blend is the lowest but it improves gradually when the glass fiber content is increased. Impact test results revealed that impact strength of 80%PP+20%PA6 polymer blend is the highest whereas all the composites show reduced impact strength or toughness. It is noticed that 80%PP+14%PA6+6%GF composite exhibits the lowest impact strength