6495

6059

كارشناسي ارشد

مخابرات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1390

نه، 91ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

پژمان خديوي، مسعودرضا هاشمي

2/12/90

حسين سعيدي، محمد جواد اميدي

1396/10/12

كتابنامه

برق و كامپيوتر

مهندسي برق و كامپيوتر

ID6059

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

A Model for QoS aware Wireless Communication in Hospitals Zahra alavikia z alavikia@ec iut ac ir Date of Submission September 18 2011 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Persian Supervisor Pejman khadivi pkhadivi@ec iut ac ir Masoud Reza Hashemi hashemim@cc iut ac irAbstract Recently the research regarding wireless applications in e Health services has increased The use ofwireless technology has an important influence on different e Health applications because the main aim inthe healthcare networks is the delivery of accurate medical information anytime and anywhere Simplecommunications fast delivery of medical information reducing treatment cost and reducing the medicalworkers error rate are the main benefits of using wireless technologies in e Health applications But on theother hand the use of wireless technologies causes the electromagnetic interference EMI problem Themain effects of the interference are automatic shutdown automatic restart and waveform distortion ofsensitive medical devices that can imperil patients who are using those devices The most critical issues indesigning wireless networks for e Health environments such as a hospital are how to design an effectivenetwork to provide guaranteed quality of service QoS and to consider the EMI problem Although powermanagement and reducing the transmission power is an effective method to avoid the EMI but it causes thenumber of successful message deliveries to the AP to decrease and hence the QoS requirements cannot bemet In this work we first introduce QoS requirements in different medical data transmissions and then investigate two approaches to avoid EMI effects in sensitive healthcare environments such as a hospital Inone approach the controller must notify users of their maximum allowable transmission power based on theinformation about EMI immunity levels status of sensitive medical devices and locations of users andsensitive medical devices In upper bound power calculation per user the controller must have accurate andperfect knowledge of the location and the status of all users in the network and this information must beupdated with every change in the network However these can increase the complexity of the controller inthe network To reduce the complexity of the controller in the first approach the hospital environment issectored into areas and the maximum allowable power for each area is calculated We then compareinterference and outage probabilities for proposed approaches Results show that by considering networkparameters the interference problem can be alleviated with different arrival probabilities Powermanagement methods can control and avoid EMI problem but it can increase the number of unsuccessfulmessage deliveries To reduce the outage probability in aforementioned scenarios the advantages of relaystation placement are investigated We apply the genetic algorithm to find optimal positions for relays in thehospital Performance evaluation results show that two hop transfer of the information by using relaystations can reduce the outage probability in addition it can reduce the delay of high priority users for lowdata size We also investigate different relay assignment methods that can be used in healthcareenvironments Keywords Wireless communication EMI problem power management outage reduction

پژمان خديوي، مسعودرضا هاشمي

حسين سعيدي، محمد جواد اميدي