PENGARUH INTERFERENSI BLUETOOTH TERHADAP KINERJA WLAN IEEE 802.11b PADA FREKUENSI 2,4 GHz (IMPACT OF BLUETOOTH INTERFERENCE ON THE WLAN IEEE 802.11B PERFORMANCE ON FREQUENCY 2.4GHz)

ABSTRAKSI: Tugas Akhir ini berupa analisa dari penurunan kinerja pada WLAN (Wireless Local Area Network) IEEE 802.11b akibat keberadaan piconet Bluetooth. IEEE 802.11b adalah sistem DSSS (Direct Sequence Spread Spectrum) yang beroperasi pada pita frekuensi 2,4GHz. IEEE 802.11b didesain untuk mengcover area yang luas, sampai dengan diameter 100 meter, dan menghubungkan ratusan komputer. Sistemnya beroperasi pada empat data rate yang berbeda yaitu 1; 2; 5,5; dan 11 Mbps.Bluetooth adalah sistem FHSS (Frequency Hopping Spread Spectrum) yang beroperasi pada pita frekuensi yang sama dengan IEEE 802.11b. Aplikasi utama Bluetooth adalah komunikasi jarak dekat, antara lain komunikasi antara notebook, unit-unit palm, handphone, dsb dalam sebuah ”piconet”.Pada Tugas Akhir ini sebuah model dikembangkan untuk menganalisa pengaruh interferensi Bluetooth terhadap kinerja IEEE 802.11b yang dinyatakan dengan throughput, diparameteri oleh data rate, ukuran paket IEEE 802.11b, dan jumlah piconet, sehubungan dengan jarak antara IEEE 802.11b dengan radio Bluetooth.Karena penggunaan spektrum frekuensi yang sama, maka sangat mungkin terjadi interferensi antara kedua sistem. Pengukuran dilakukan untuk melihat adanya pengaruh interferensi Bluetooth terhadap WLAN IEEE 802.11b dimana analisa dikhususkan pada perhitungan probabilitas paket error paket IEEE 802.11b akibat tabrakan dengan paket Bluetooth.Kata Kunci : ABSTRACT: The final task presents analysis of the performance degradation of IEEE 802.11b WLAN due to the presence of Bluetooth piconets. The IEEE 802.11b is a direct sequence spread spectrum (DSSS) system operating in the 2.4GHz band. It is designed to cover large areas, up to 100 meters, and connect hundreds of computers. The system operates at four different data rates of 1, 2, 5.5 and 11 Mbps.Bluetooth is a frequency hopping spread spectrum (FHSS) system operating in the same frequency band as the IEEE 802.11b. The primary aplications for Bluetooth are along the lines of a Wireless Personal Area Network (WPAN), involving relatively short distances, for communication between notebooks, palm units, handphone, etc within a “piconet”.In this final task, a model is developed that captures the performance impact of Bluetooth interference on the IEEE 802.11b packet reception that expressed as throughput, parameterized by the IEEE 802.11b data rate, packet size, and a number of Bluetooth piconets, as well as distance between the collocating IEEE 802.11b and Bluetooth radios.Both systems share the same spectrum frequency, so it is very possible that will appear interference. It’s need a measurement to watch the impact of Bluetooth to WLAN IEEE 802.11b while the analysis specialized on the calculation of packet error probability of IEEE 802.11b packet that collided with Bluetooth packet.Keyword

OFDM over IEEE 802.11b hardware for telemedical applications

Using a wireless Local Area Network (WLAN) to transmit live high-quality video suitable for a telemedical application presents many challenges, including ensuring sufficient Quality of Service (QoS) for the end-user to be able to make an accurate diagnosis. One of the many problems that exist when developing such a system is the multipath effect caused by the reflections of the transmitted signals on various surfaces including walls, floors, furniture and people. This degrades the signal quality and reduces the amount of available bandwidth and, thus, the quality of the image. Presently, most of Europe is using the IEEE 802.11b hardware for such applications. As an alternative to the existing modulation of 802.11b, Orthogonal Frequency Division Multiplexing (OFDM) is investigated, especially for use inside hospitals. The advantages of using this modulation over IEEE 802.11b hardware for a telemedicine application are examined by means of simulation using three different simulation packages

A performance study of packet scheduling algorithms for coordinating colocated Bluetooth and IEEE 802.11b in a Linux machine

Due to the proliferation of hand-held short-range communication devices, coexistence between Bluetooth and IEEE 802.11b has become a performance critical issue. In this study, we performed an actual implementation of a Linux based network access point (NAP), in which Bluetooth and IEEE 802.11b are colocated. Such a NAP is expected to be crucial in supporting 'hot-spot' systems targeted to serve nomadic users carrying either a Bluetooth or a IEEE 802.11b device. Specifically, the goal of our study is to investigate the efficacy of a software based interference coordination approach. We consider five most commonly used scheduling algorithms in a Linux environment. Our extensive experimental results obtained in a real environment indicate that a hierarchical scheduling approach exhibits the best performance in terms of aggregate bandwidth achieved by Bluetooth and IEEE 802.11b.published_or_final_versio

Delay Analysis of GTS Bridging between IEEE 802.15.4 and IEEE 802.11 Networks for Healthcare Applications

We consider interconnection of IEEE 802.15.4 beacon-enabled network cluster with IEEE 802.11b network. This scenario is important in healthcare applications where IEEE 802.15.4 nodes comprise patient's body area network (BAN) and are involved in sensing some health-related data. BAN nodes have very short communication range in order to avoid harming patient's health and save energy. Sensed data needs to be transmitted to an access point in the ward room using wireless technology with higher transmission range and rate such as IEEE 802.11b. We model the interconnected network where IEEE 802.15.4-based BAN operates in guaranteed time slot (GTS) mode, and IEEE 802.11b part of the bridge conveys GTS superframe to the 802.11b access point. We then analyze the network delays. Performance analysis is performed using EKG traffic from continuous telemetry, and we discuss the delays of communication due the increasing number of patients

Queue utilization with hop based enhanced arbitrary inter frame spacing MAC for saturated ad HOC networks

© 2015 IEEE. Path length of a multi hop Ad Hoc networks has an adverse impact on the end-to-end throughput especially during network saturation. The success rate of forwarding packets towards destination is limited due to interference, contention, limited buffer space, and bandwidth. Real time applications streaming data fill the buffer space at a faster rate at the source and its nearby forwarding nodes since the channel is shared. The aim of this paper is to increase the success rate of forwarding the packets to yield a higher end-to-end throughput. In order to reduce loss of packets due to buffer overflow and enhance the performance of the network for a saturated network, a novel MAC protocol named Queue Utilization with Hop Based Enhanced Arbitrary Inter Frame Spacing based (QU-EAIFS) MAC is proposed for alleviating the problems in saturated Ad Hoc networks. The protocol prioritises the nodes based on its queue utilization and hops travelled by the packet and it helps achieving higher end-toend performance by forwarding the packets with higher rate towards the destination during network saturation. The proposed MAC enhances the end-to-end performance by approximately 40% and 34% for a 5hop and 6hop communication respectively in a chain topology as compared to the standard IEEE802.11b. The performance of the new MAC also outperforms the performance of IEEE 802.11e MAC. In order to validate the protocol, it is also tested with short hops and varying packet sizes and more realistic random topologies