000			03878nam a22001217a 4500
999			_c66880 _d66877
100			_aSoomro, Mohammad Ali _a(Roll No.PIT-012/5) _aSupervisor Prof. Dr. Mohammad Ibrahim Channa
245			_aAn Energy, Priority and Link Aware Routing Scheme for Post-Disaster Ad-hoc Communication Networks (PhD Thesis)
260			_aNawabshah: _bQUEST, _c2021.
300			_a109p. ;
500			_aABSTRACT It is a great challenge for government and other social organizations to handle the emergency situations caused by natural or man-made disasters. During such crises, the traditional conununication infrastructures such as landline telephone and cellular mobile networks are damaged and don't provide adequate communication services to the first responders for performing efficient rescue operations. Various types of information are used to handle the critical situations. For example, the rescue workers may use voice and video conversations to call fire fighters, non-governmental organizations, police, ambulance services and doctors at hospitals to save affected peoples and save other losses at the disaster site. The rescue workers may also require disaster site maps and other geographical information for locating the damage. Mobile ad-hoc networks are used as an alternative by the rescue workers for exchanging crucial information at the disaster site. The wireless nodes in mobile ad-hoc networks are battery constrained devices. During emergency situations, it is very difficult to recharge or replace the batteries. Moreover due to fire, dust and other environmental factors, the wireless channel may experience noise and the quality of the data communication may degrade. It is of the great importance to save the battery power of the mobile nodes and transfer the emergency related information through good quality wireless links so that maximum information may reach to its destinations. For that the routing protocols are used to select the proper links for source to destination communication. The uninterrupted flow of emergency related information in real time helps the first responders to accomplish the rescue operations efficiently. This research, in the first instance an energy and priority aware ad-hoc on demand distance vector (EPAODV) routing scheme has been proposed. The proposed routing protocol classifies the emergency related information into time critical and normal tram and selects routes based on the traffic priority and residual energy of mobile nodes, The performance of the EPAODV routing scheme has been evaluated and compared with traditional ad-hoc on demand distance vector (AODV) routing scheme in terms of packet delivery ratio, End-to-End delay. Throughput, energy consumption and routing overhead parameters. In the proposed scenarios the EPAODV minimizes the routing overhead by 16.78%, reduces End-to-End delay by 23% and the network energy consumption by 25% respectively. Later on, the EPAODV scheme has been extended by addition of link quality. The new scheme is called an energy, priority and link aware ad-hoc on demand distance vector routing EPLAODV). The EPLAODV scheme sets the threshold values for energy level and signal-to-noise ratio of the link based on time critical and normal traffic. The performance evaluation through extensive simulation parameters shows that EPLAODV improves the packet delivery ratio of EPAODV by 65%. It also saves the energy consumption on average of EPAODV by 41%. Further the EPLAODV also compared with other benchmarking protocols such as the energy and distance aware AODV (EDA-AODV) and the basic AODV. The obtained results show that EPLAODV increases the throughput of EDA-AODV and AODV on average by 12.6% and 26%. Keywords: Emergency response communication, AODV, EPAODV, EPLAODV, time critical traffic, normal traffic.
700			_aDepartment of Information Technology
942			_cBK