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Coexistence Management in Wireless Networks

Thesis Info

Author

Ayesha Hasan

Supervisor

Bilal M. Khan

Department

Department of Electrical and Power Engineering

Program

MS

Institute

National University of Engineering and Technology

Institute Type

Private

Campus Location

PNEC

City

Karachi

Province

Sindh

Country

Pakistan

Degree Starting Year

2018

Degree End Year

2022

Viva Year

2022

Thesis Completing Year

2022

Thesis Completion Status

Completed

Page

82

Subject

Wireless Sensor Networks

Language

English

Added

2023-08-07 23:32:32

Modified

2024-03-24 20:25:49

ARI ID

1691507021172

Similar


The rapid proliferation of wireless networks poses a great challenge to effective coexistence management amongst a plethora of wireless communication protocol users that are co-located and contending for the ever-scarce spectrum available. In particular, low-powered ad-hoc networks such as WSNs which are an integral part of the Internet of Things (IoT) and Industrial Internet of Things (IIoT) landscape, will be highly susceptible to cross-technology interference. This jeopardizes the envisaged performance and reliability of IoT and IIoT applications comprising many safety and mission-critical applications. For effective spectrum utilization and optimum performance of existing wireless networks and the realization of new wireless networks, coexistence management of the wireless spectrum is the key to ensuring the optimal performance of multiple wireless networks operating in close proximity. We propose a two-step approach to attaining coexistence starting with wireless interference identification as spectrum awareness would be of keen importance in identifying concurrent transmission and subsequently applying suitable interference mitigation techniques to ensure coexistence and prevent communication blackout. Our work uses deep learning to identify the presence of WSN, WiFi and Bluetooth single-label signals. Furthermore, we aim to identify multi-label concurrent signal transmissions that are significant in the context of interference management. Moreover, a wireless coexistence management framework for WSNs is proposed which is an interference-aware and coexistence-friendly modification inspired by the WSN LEACH architecture that uses the proposed wireless interference identification for detection of the type of interference and the affected nodes. Depending upon the interference type, the coexistence framework assigns specific countermeasures that best counter the interference with good throughput and optimal energy consumption. In this work, we have proposed a coping mechanism against WiFi interference using an adaptive backoff time period and an in-depth study of the node interference levels
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دھڑکنوں سے پیام آیا ہے

دھڑکنوں سے پیام آیا ہے
میری رگ رگ میں وہ سمایا ہے

کوئی کیوں تیرے ساتھ ساتھ چلے
میں ہی ہوں اور میرا سایا ہے

اُس کی مسکان پر ہیں پھول فدا
چاند پر حسن اس کا چھایا ہے

کوئے جاناں میں بکتے یوسف کو
کوئی کیوں کر خرید لایا ہے

آج دھڑکن بھی تیز ہے دل کی
آج اُن کا سلام آیا ہے

میں بصد شوق منتظر تھی فضاؔ
دل یہ کس کا پیام لایا ہے

الاستحسان وحجيته في التشريع الاسلامي

Due to the requirement of Muslim Ummah in current issues a few rules were added in Islamic Jurisprudence. Among these new added rules is Al-Istehsan. The article discussed this rule covering the points given below: - Various definitions ofAl-Istehsan and its explanation. - Five types; Istehsan by nuss, Istehsan by ijmaa, Istehsan by urf, Istehsan by need, istehsan by qiyas. - Authenticity of Al-Istehsan by citing different opinions of the scholars. - Difference between Al-Istehsan and qiyas

In Vitro Effect of New Antibiotics Against Clinical Isolates of Salmonella Enterica Subspecies Enterica

Background: Typhoid fever is caused by Salmonella enterica serovar Typhi (S, Typhi, T is capital because Typhi is serotype and not species) a gram negative bacterium (1). It continues to be a global health problem with over 21.6 million cases and more than 200,000 deaths occurring annually (2;3). Most of these deaths occur in Asia (4). Salmonella enterica serotype Paratyphi is traditionally associated with relatively milder illness as compared to Salmonella enterica serotype Typhi. Aim & Objectives: The aim of this study was to determine in vitro MIC patterns of various therapeutic alternatives available for the treatment of enteric fever and non-typhoidal salmonellae in an endemic region reporting a recent increase in ciprofloxacin resistance. Study design: It is a cross sectional research carried out at Armed Forces Institute of Pathology Rawalpindi. Research was conducted from June 2011 to May 2013. Materials and Methods: Samples of blood, bone marrow, pus, urine, stool and fluids were collected from suspected cases of salmonella infections. Standard protocols were observed during collection and transportation. Culture was applied on Bactec 9050 special and/or standard media. Suspected salmonella colonies were tested by API 20E and confirmed by serology. The isolates were also tested for resistance to antibiotics ampicillin, cotrimoxazole, ciprofloxacin, ceftriaxone, doripenem, imipenem, ertapenem, aztreonam, moxifloxacin, cefpirome, cefepime, gatifloxacin, and chloramphenicol by Kirby-Bauer disc diffusion method (5). MIC (Minimum Inhibitory concentration) was done on MDR and ciprofloxacin intermediate or resistant cases by E-strips. Results: 316 isolates of Salmonella were recovered from 2230 specimens. Resistance by disk diffusion technique was determined, for Salmonella Typhi against Ampicillin 72%, Chloramphenicol 62%, Cotrimoxazole 41.2%, ceftriaxone 2.4%, ciprofloxacin 8%, cefpodoxime 4.7%, doripenem 2.3%, ertapenem 3.5%, aztreonam 3.5%, and moxifloxacin 3.5%. No resistance was noted for imipenem, cefepime and gatifloxacin. Resistance noted in Salmonella Paratyphi A was ampicillin 60%, chloramphenicol 40%, cotrimoxazole 38%, ceftriaxone 7.9%, ciprofloxacin 8%, cefpodoxime 7.9%, imipenem and ertapenem 2.6%, aztreonam 1.3%, moxifloxacin 6.6%, and gatifloxacin1.3%. No resistance was noted for doripenem and cefepime. For non-typhoidal salmonellae resistance was noted only against cotrimoxazole 66.6% and ciprofloxacin 7%. For S. Typhi imipenem MIC90 was 0.38 and MIC50 was 0.25. For cefpirome MIC90 was 0.64 and MIC50 was 0.09. For aztreonam MIC90 was 0.12 and MIC50 was 0.09. For cefpodoxime MIC90 was 0.75 and MIC50 was 0.38. For azithromycin these values were 16.0 and 7.0 and for tigecycline they were 0.25 and 0.09