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Papers by Raheleh Dilmaghani

The application of a reliable communication infrastructure in emergency situations is the focus o... more The application of a reliable communication infrastructure in emergency situations is the focus of this project. Communication and interoperability between different organizations of first responders has been a problem for a long time. There have been examples of failure in communication between different organizations at World Trade Center on 9/11: for example some of the police warnings were not heard by fire fighters that resulted in several lives lost. In most cases, network unavailability or incapability of coordination among networks causes much damage. A communication infrastructure has specific requirements to be widely deployable at emergency applications such as high reliability, robustness, interoperability with existing technologies, quick reconfiguration, and low cost. It must be able to operate in a highly distributed and infrastructure-less manner, quickly deployable, easy to reconfigure, and allocate network resources efficiently. We propose a Hybrid Wireless Mesh Network as a well-suited candidate capable of creating a communication infrastructure where the existing communication infrastructure is damaged or unavailable. This infrastructure has the ability to work in a heterogeneous environment where different technologies might be available as backhaul through multiple interface cards designed in Calit2's CalMesh boxes. In addition to the technical constraints in such a demanding environment, we must consider some of the sociological problems that arise when new technologies are introduced, including resistance to technology adoption, and designing new warning systems to utilize the new infrastructure, and concerns surrounding sharing information and privacy.In our research to date, we have deployed a HWMN made up of Calit2's interoperable CalMesh nodes at a full-scale crisis response drill organized by the San Diego Metropolitan Medical Strike Team (MMST) in which we were able to collect network statistical data from the medical first responders' communication over the network we deployed.We are also developing our simulation results in cellular networks investigating different real scenarios that may occur at ground zero. We would like to extract mobility patterns and channel characterization from real world scenarios to integrate this simulation results with other transportation and evacuation simulators in order to allocate network resources more efficiently, and route traffic effectively to insure that cellular infrastructures are not overloaded so that broadcast warnings and messages are still received by evacuees.

IEEE International Performance, Computing, and Communications Conference, Apr 1, 2007

Journal of Software, Feb 1, 2008

Mobile Ad Hoc Networking and Computing, Jul 29, 2013

The importance of communication, information sharing and interoperability in an emergency respons... more The importance of communication, information sharing and interoperability in an emergency response scenario have risen recently based on the frequency of disasters throughout the world and the wide range of severities and degrees of impacts. This work contributes to the area of emergency response communication qualitatively by presenting a systematic approach to develop an organizational communication model to improve overall emergency response. Establishing and accessing a reliable communication infrastructure at crisis is crucial in order to have accurate and real-time exchange of information. This work identifies a set of potential network oriented problems in existing inter-organizational communication protocols incorporating the information collected at several drill participations and interviewing the first responders. We conquer the complexity of a large, unique and unpredictable emergency response process by a top-down approach. We are constructing a high-level hierarchical ...

ABSTRACT- In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due ... more ABSTRACT- In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the availability of unlicensed spectrum and low cost IEEE 802.11b/a/g-based devices. The future of wireless Internet provisioning will see the convergence of the Wireless Wide Area Networks (WWANs) and WMNs. This convergence between WWANs and WMNs demands new architectures and experiments on real network testbeds. We designed a novel Hybrid Wireless Network (HWN) architecture that integrates WMNs and WWANs and herein we present the early results obtained through limited performance evaluation in our testbed. Though our HWN architecture is primarily designed to provide an easily reconfigurable alternative for first responders handling emergency response, it is an early attempt at providing integrated wireless service provisioning. This architecture uses point-to-point and point-to-multipoint long haul wireless links in order to provide gateway functionality for multi-hop wireless netwo...

Proceedings of the Annual Hawaii International Conference on System Sciences

In a distributed heterogeneous computing system, the resources have different capabilities and ta... more In a distributed heterogeneous computing system, the resources have different capabilities and tasks have different requirements. To maximize the performance of the system, it is essential to assign resources to tasks (match) and order the execution of tasks on each resource (schedule) in a manner that exploits the heterogeneity of the resources and tasks. The mapping (defined as matching and scheduling) of tasks onto machines with varied computational capabilities has been shown, in general, to be an NP-complete problem. Therefore, heuristic techniques to find a near-optimal solution to this mapping problem are required. Dynamic mapping is performed when the arrival of tasks is not known a priori. In the heterogeneous environment considered in this study, tasks arrive randomly, tasks are independent (i.e., no communication among tasks), and tasks have priorities and multiple deadlines. This

Emergency communication infrastructure should allow fast and reliable information dissemination t... more Emergency communication infrastructure should allow fast and reliable information dissemination to assist community and ease mitigation activities. Failure in communication networks and information exchange in past has impeded the responders ’ efforts resulting in huge loss of lives and economical impacts. Reliability, quick reconfiguration and interoperability are specific requirements of a robust communication infrastructure at disaster sites. We have deployed a wireless mesh Test bed at several drills on campus and in the city to identify the vulnerabilities of the existing communication infrastructure and enhance the network capacity and performance. We present the real measurements obtained over the deployment of the wireless mesh test bed at disaster site followed by an analytical discussion of the important observations concerning the factors that impact performance or cause network congestion. 1.

Abstract—Sensor applications are typically composed of a number of functional components that run... more Abstract—Sensor applications are typically composed of a number of functional components that run distributedly on the nodes of a sensor network, communicating and interacting with one another. Service composition is emerging as a viable approach towards the automatic synthesis of such sensor applications. However, for service composition to be practical, it has to comply with policies that define security and management constraints on the use of these service components and the interconnections amongst them. Prior research efforts have primarily focused on efficient evaluation of security policies during the composition process, which is not sufficient when generic network management constraints need to be expressed and evaluated. In this work, we propose a policy model and evaluation approach that enables us to define and check attribute-based policies, for controlling the sensor service composition process. Attributebased policies are generic and allows us to express a wider spec...

Communication technology has specific requirements within the context of emergency response appli... more Communication technology has specific requirements within the context of emergency response applications: reliability, robustness, interoperability, and minimum interdependencies. This paper presents a set of technical and sociological factors that need to be considered within the application of future communication technology in emergency planning, response, and recovery. We have deployed a wireless Ad hoc mesh network in several drills on the UCSD campus and throughout San Diego County, and here we present the results directly extracted from measurements taken over the network. The measurements show the aspects of the network that need to be improved for better performance and more efficient network resource usage. Finally, we highlight some privacy and security concerns that need to be addressed in specific scenarios. 1.

It is our great pleasure to welcome you to the 2013 ACM Workshop on Mobile Cloud Computing (ACM M... more It is our great pleasure to welcome you to the 2013 ACM Workshop on Mobile Cloud Computing (ACM MobileCloud'13). We thank the General Chairs and Workshop Chairs of ACM MobiHoc 2013 for accepting our workshop proposal on mobile cloud computing which is one of the fast emerging areas in communication and computing. We received 40 paper submissions together from USA, India, China, Japan, Iran, and Morocco. We conducted a 1st level review of the submissions and rejected/withdrawn about 21 papers. The remaining 19 papers shortlisted in the 1st level review were assigned to the Technical Program Committee for a rigorous 2nd level review. On the results on the 2nd level review, we conducted a quick Meta review and interacted with the authors before finalizing the six papers for publication and presentation. Our acceptance rate varies from about 15% (of all submissions) to 31% (of the papers under 2nd level reviews). In addition to the six peer-reviewed papers, one invited paper is also...

We propose a new Data Center Network (DCN) architecture, based on the principles of Information-C... more We propose a new Data Center Network (DCN) architecture, based on the principles of Information-Centric Networking (ICN). Our Info-Centric Data Center Network (IC-DCN) addresses many of the pain-points in current DCNs, such as network scalability, host mobility, etc. At the same time, IC-DCN introduces a number of new features to the current information-centric network architec-tures. We achieve this goal by decoupling the control-plane and data-plane functionalities. The control-plane is implemented in a centralized manner, while the data-plane is fully distributed. We show that IC-DCN effectively addresses many of the ICN chal-lenges in the data center, such as routing scalability, full network utilization, and name space management.

In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the ava... more In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the availability of unlicensed spectrum and low cost IEEE 802.11b/a/g-based devices. The future of wireless Internet provisioning will see the convergence of the Wireless Wide Area Networks (WWANs) and WMNs. This convergence between WWANs and WMNs demands new architectures and experiments on real network testbeds. We designed a novel Hybrid Wireless Network (HWN) architecture that integrates WMNs and WWANs and herein we present the early results obtained through limited performance evaluation in our testbed. Though our HWN architecture is primarily designed to provide an easily reconfigurable alternative for first responders handling emergency response, it is an early attempt at providing integrated wireless service provisioning. This architecture uses point-to-point and point-to-multipoint long haul wireless links in order to provide gateway functionality for multi-hop wireless networks. We st...

The application of a reliable communication infrastructure in emergency situations is the focus o... more The application of a reliable communication infrastructure in emergency situations is the focus of this project. Communication and interoperability between different organizations of first responders has been a problem for a long time. There have been examples of failure in communication between different organizations at World Trade Center on 9/11: for example some of the police warnings were not heard by fire fighters that resulted in several lives lost. In most cases, network unavailability or incapability of coordination among networks causes much damage. A communication infrastructure has specific requirements to be widely deployable at emergency applications such as high reliability, robustness, interoperability with existing technologies, quick reconfiguration, and low cost. It must be able to operate in a highly distributed and infrastructure-less manner, quickly deployable, easy to reconfigure, and allocate network resources efficiently. We propose a Hybrid Wireless Mesh Network as a well-suited candidate capable of creating a communication infrastructure where the existing communication infrastructure is damaged or unavailable. This infrastructure has the ability to work in a heterogeneous environment where different technologies might be available as backhaul through multiple interface cards designed in Calit2's CalMesh boxes. In addition to the technical constraints in such a demanding environment, we must consider some of the sociological problems that arise when new technologies are introduced, including resistance to technology adoption, and designing new warning systems to utilize the new infrastructure, and concerns surrounding sharing information and privacy.In our research to date, we have deployed a HWMN made up of Calit2's interoperable CalMesh nodes at a full-scale crisis response drill organized by the San Diego Metropolitan Medical Strike Team (MMST) in which we were able to collect network statistical data from the medical first responders' communication over the network we deployed.We are also developing our simulation results in cellular networks investigating different real scenarios that may occur at ground zero. We would like to extract mobility patterns and channel characterization from real world scenarios to integrate this simulation results with other transportation and evacuation simulators in order to allocate network resources more efficiently, and route traffic effectively to insure that cellular infrastructures are not overloaded so that broadcast warnings and messages are still received by evacuees.

IEEE International Performance, Computing, and Communications Conference, Apr 1, 2007

Journal of Software, Feb 1, 2008

Mobile Ad Hoc Networking and Computing, Jul 29, 2013

The importance of communication, information sharing and interoperability in an emergency respons... more The importance of communication, information sharing and interoperability in an emergency response scenario have risen recently based on the frequency of disasters throughout the world and the wide range of severities and degrees of impacts. This work contributes to the area of emergency response communication qualitatively by presenting a systematic approach to develop an organizational communication model to improve overall emergency response. Establishing and accessing a reliable communication infrastructure at crisis is crucial in order to have accurate and real-time exchange of information. This work identifies a set of potential network oriented problems in existing inter-organizational communication protocols incorporating the information collected at several drill participations and interviewing the first responders. We conquer the complexity of a large, unique and unpredictable emergency response process by a top-down approach. We are constructing a high-level hierarchical ...

ABSTRACT- In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due ... more ABSTRACT- In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the availability of unlicensed spectrum and low cost IEEE 802.11b/a/g-based devices. The future of wireless Internet provisioning will see the convergence of the Wireless Wide Area Networks (WWANs) and WMNs. This convergence between WWANs and WMNs demands new architectures and experiments on real network testbeds. We designed a novel Hybrid Wireless Network (HWN) architecture that integrates WMNs and WWANs and herein we present the early results obtained through limited performance evaluation in our testbed. Though our HWN architecture is primarily designed to provide an easily reconfigurable alternative for first responders handling emergency response, it is an early attempt at providing integrated wireless service provisioning. This architecture uses point-to-point and point-to-multipoint long haul wireless links in order to provide gateway functionality for multi-hop wireless netwo...

Proceedings of the Annual Hawaii International Conference on System Sciences

In a distributed heterogeneous computing system, the resources have different capabilities and ta... more In a distributed heterogeneous computing system, the resources have different capabilities and tasks have different requirements. To maximize the performance of the system, it is essential to assign resources to tasks (match) and order the execution of tasks on each resource (schedule) in a manner that exploits the heterogeneity of the resources and tasks. The mapping (defined as matching and scheduling) of tasks onto machines with varied computational capabilities has been shown, in general, to be an NP-complete problem. Therefore, heuristic techniques to find a near-optimal solution to this mapping problem are required. Dynamic mapping is performed when the arrival of tasks is not known a priori. In the heterogeneous environment considered in this study, tasks arrive randomly, tasks are independent (i.e., no communication among tasks), and tasks have priorities and multiple deadlines. This

Emergency communication infrastructure should allow fast and reliable information dissemination t... more Emergency communication infrastructure should allow fast and reliable information dissemination to assist community and ease mitigation activities. Failure in communication networks and information exchange in past has impeded the responders ’ efforts resulting in huge loss of lives and economical impacts. Reliability, quick reconfiguration and interoperability are specific requirements of a robust communication infrastructure at disaster sites. We have deployed a wireless mesh Test bed at several drills on campus and in the city to identify the vulnerabilities of the existing communication infrastructure and enhance the network capacity and performance. We present the real measurements obtained over the deployment of the wireless mesh test bed at disaster site followed by an analytical discussion of the important observations concerning the factors that impact performance or cause network congestion. 1.

Abstract—Sensor applications are typically composed of a number of functional components that run... more Abstract—Sensor applications are typically composed of a number of functional components that run distributedly on the nodes of a sensor network, communicating and interacting with one another. Service composition is emerging as a viable approach towards the automatic synthesis of such sensor applications. However, for service composition to be practical, it has to comply with policies that define security and management constraints on the use of these service components and the interconnections amongst them. Prior research efforts have primarily focused on efficient evaluation of security policies during the composition process, which is not sufficient when generic network management constraints need to be expressed and evaluated. In this work, we propose a policy model and evaluation approach that enables us to define and check attribute-based policies, for controlling the sensor service composition process. Attributebased policies are generic and allows us to express a wider spec...

Communication technology has specific requirements within the context of emergency response appli... more Communication technology has specific requirements within the context of emergency response applications: reliability, robustness, interoperability, and minimum interdependencies. This paper presents a set of technical and sociological factors that need to be considered within the application of future communication technology in emergency planning, response, and recovery. We have deployed a wireless Ad hoc mesh network in several drills on the UCSD campus and throughout San Diego County, and here we present the results directly extracted from measurements taken over the network. The measurements show the aspects of the network that need to be improved for better performance and more efficient network resource usage. Finally, we highlight some privacy and security concerns that need to be addressed in specific scenarios. 1.

It is our great pleasure to welcome you to the 2013 ACM Workshop on Mobile Cloud Computing (ACM M... more It is our great pleasure to welcome you to the 2013 ACM Workshop on Mobile Cloud Computing (ACM MobileCloud'13). We thank the General Chairs and Workshop Chairs of ACM MobiHoc 2013 for accepting our workshop proposal on mobile cloud computing which is one of the fast emerging areas in communication and computing. We received 40 paper submissions together from USA, India, China, Japan, Iran, and Morocco. We conducted a 1st level review of the submissions and rejected/withdrawn about 21 papers. The remaining 19 papers shortlisted in the 1st level review were assigned to the Technical Program Committee for a rigorous 2nd level review. On the results on the 2nd level review, we conducted a quick Meta review and interacted with the authors before finalizing the six papers for publication and presentation. Our acceptance rate varies from about 15% (of all submissions) to 31% (of the papers under 2nd level reviews). In addition to the six peer-reviewed papers, one invited paper is also...

We propose a new Data Center Network (DCN) architecture, based on the principles of Information-C... more We propose a new Data Center Network (DCN) architecture, based on the principles of Information-Centric Networking (ICN). Our Info-Centric Data Center Network (IC-DCN) addresses many of the pain-points in current DCNs, such as network scalability, host mobility, etc. At the same time, IC-DCN introduces a number of new features to the current information-centric network architec-tures. We achieve this goal by decoupling the control-plane and data-plane functionalities. The control-plane is implemented in a centralized manner, while the data-plane is fully distributed. We show that IC-DCN effectively addresses many of the ICN chal-lenges in the data center, such as routing scalability, full network utilization, and name space management.

In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the ava... more In the recent past, Wireless Mesh Networks (WMNs) have become increasingly popular due to the availability of unlicensed spectrum and low cost IEEE 802.11b/a/g-based devices. The future of wireless Internet provisioning will see the convergence of the Wireless Wide Area Networks (WWANs) and WMNs. This convergence between WWANs and WMNs demands new architectures and experiments on real network testbeds. We designed a novel Hybrid Wireless Network (HWN) architecture that integrates WMNs and WWANs and herein we present the early results obtained through limited performance evaluation in our testbed. Though our HWN architecture is primarily designed to provide an easily reconfigurable alternative for first responders handling emergency response, it is an early attempt at providing integrated wireless service provisioning. This architecture uses point-to-point and point-to-multipoint long haul wireless links in order to provide gateway functionality for multi-hop wireless networks. We st...