Ashutosh Dutta - Academia.edu (original) (raw)
Papers by Ashutosh Dutta
The Second Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services, 2005
... Shin et al [14] proposes a scheme that reduces the delay due to MAC layer handoff by providin... more ... Shin et al [14] proposes a scheme that reduces the delay due to MAC layer handoff by providing a cacheYbased algorithm. [15] provides an optimized handover scheme for SIPYbased mobility management, where the transient traffic is forwarded from the old subnet to the new ...
With the increasing interest in deploying 4G/LTE network, IMS has a potential to be deployed in w... more With the increasing interest in deploying 4G/LTE network, IMS has a potential to be deployed in wide scale in order to support mobile Internet and value-added services over next-generation networks. Moreover, the effort to create an operator-controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions between core networks elements. Thus, the carriers are trying to explore alternative ways to deploy IMS that will allow them to manage their network in a cost effective manner while offering rich communications services. One of such approaches is self-organization of IMS (SOIMS). The self-organizing IMS can enable the IMS functional components to adapt dynamically based on the features like network load, number of users, node failures and available system resources. This paper proposes different mechanisms to handle self-organizing IMS using load balancing approach where the users are unaware of changes. The proposed solution enables topology hiding, recovery from IMS nodes failure, session continuity, and scaling.
2004 IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communications
2010 IEEE 4th International Conference on Internet Multimedia Services Architecture and Application, 2010
... Environment) has been proposed by ITU-T SG13 as one of the NGN capabilities [4]. The primary ... more ... Environment) has been proposed by ITU-T SG13 as one of the NGN capabilities [4]. The primary goal of NGN OSE is to enable a service environment for flexible and agile service creation, execution and management based on an open service platform concept, ie, an ...
2011 IEEE Symposium on Computers and Communications (ISCC), 2011
The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP ... more The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP based network, has been the subject of considerable attention for several years. While there have been tremendous efforts to develop its architecture and protocols, especially for IMS, a key technology of the NGN, its wide deployment is still a long way off. However, efforts to create
Mobile networking technology seeks to preserve the user experience as the user moves and thereby ... more Mobile networking technology seeks to preserve the user experience as the user moves and thereby crosses from one network into another. A mobility event is the result of one network connection path being replaced by another via the rebinding of common system properties that may happen at any one of several protocol layers of the mobile. The rebinding is a sequential process and each process takes finite amount of time. This overall process results in generating a period of time in which network service is degraded by transient data loss and increased end-to-end delay. Formal techniques to characterize this problem and to develop optimization methodologies for these processes have never been studied as part of a systematic framework for mobility solutions. This dissertation develops a systematic systems model that analyzes the systems properties associated with a mobility event and characterizes several systems optimization techniques for these processes. The proposed formal mobility...
IEEE Wireless Communications and Networking Conference, 2005
The integrated networking technology prototype demonstrates the capability of several emerging ne... more The integrated networking technology prototype demonstrates the capability of several emerging networking technologies to operate together seamlessly to enhance network services targeted for dynamic mobile environments such as those found in the battlefield. The prototype consists of four technologies: (1) autoconfiguration technology supports autonomous and rapid network deployment and configuration; (2) self-managed virtual network (SMVN) technology provides virtual networking capabilities
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)
In this work, we measure Wireless Local Area Network (WLAN) voice performance and capacity. While... more In this work, we measure Wireless Local Area Network (WLAN) voice performance and capacity. While most WLAN applications today are data centric, the growing popularity of Voice over IP (VoIP) applications and the trend towards convergence with cellular networks will catalyze increased voice traffic. Since voice applications compete not only with each other, but also with data applications for WLAN bandwidth, quantifying voice performance and capacity in the presence of simultaneous data traffic is an important issue. We offer a practical investigation of the 802.11b MAC layer's ability to support simultaneous voice and data applications. We quantify VoIP capacity for standard WLAN networks, indicative of those already in the field, as well as evaluate the practical benefits of implementing backoff control and priority queuing at the access point. Conclusions are drawn based on an extensive set of real-world measurements conducted using off-theshelf equipment in an experimental testbed.
This document introduces a framework for mobility management protocols in terms of their key, abs... more This document introduces a framework for mobility management protocols in terms of their key, abstract logical functions. We explain how the framework is capable of presenting a unified view, reducing the clutter that prevents a casual reader from understanding the commonalities between different approaches in mobility management. A first order application of this framework is to enable us to examine previously standardized mobility management protocols, such as MIPv6 and PMIPv6 (as well as several of their extensions), and describe their core functionality in terms of different configurations of the logical functions defined by the framework. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts.
2006 3rd International Conference on Broadband Communications, Networks and Systems, 2006
Page 1. #Currently with Motorola Network Discovery Mechanisms for Fast-handoff Ashutosh Dutta, Su... more Page 1. #Currently with Motorola Network Discovery Mechanisms for Fast-handoff Ashutosh Dutta, Sunil Madhani#, Tao Zhang Telcordia Technologies Yoshihiro Ohba, Kenichi Taniuchi Toshiba America Research Inc. Henning Schulzrinne, Columbia University ...
IEEE Communications Magazine, 2012
Dual-mode handsets and multimode terminals are generating demand for solutions that enable conver... more Dual-mode handsets and multimode terminals are generating demand for solutions that enable convergence and seamless handover across heterogeneous access networks. The IEEE 802.21 working group is creating a framework that defines a Media Independent Handover Function (MIHF), facilitates the handover across heterogeneous access networks and help mobile users to experience a better performance during seamless handover. We also summarize a Media-independent Pre-Authentication (MPA) mechanism currently under discussion within the IETF and can be used to optimize handover performance. We present the 802.21 framework and the MPA technique and show how they can be integrated to improve the handover performance. We also describe a test-bed implementation and discuss experimental handover performance results of an 802.21-based approach in conjunction with MPA.
Wireless Pers. Multimedia …
Global IP mobility solutions using protocols like Mobile IP (MIP) and SIP are not optimized to ha... more Global IP mobility solutions using protocols like Mobile IP (MIP) and SIP are not optimized to handle micro-mobility management, where low-latency handoffs are essential, to avoid inefficiencies and performance degradation. Host based routing (HBR) schemes, such as HAWAII, ...
The Second Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services, 2005
... Shin et al [14] proposes a scheme that reduces the delay due to MAC layer handoff by providin... more ... Shin et al [14] proposes a scheme that reduces the delay due to MAC layer handoff by providing a cacheYbased algorithm. [15] provides an optimized handover scheme for SIPYbased mobility management, where the transient traffic is forwarded from the old subnet to the new ...
With the increasing interest in deploying 4G/LTE network, IMS has a potential to be deployed in w... more With the increasing interest in deploying 4G/LTE network, IMS has a potential to be deployed in wide scale in order to support mobile Internet and value-added services over next-generation networks. Moreover, the effort to create an operator-controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions between core networks elements. Thus, the carriers are trying to explore alternative ways to deploy IMS that will allow them to manage their network in a cost effective manner while offering rich communications services. One of such approaches is self-organization of IMS (SOIMS). The self-organizing IMS can enable the IMS functional components to adapt dynamically based on the features like network load, number of users, node failures and available system resources. This paper proposes different mechanisms to handle self-organizing IMS using load balancing approach where the users are unaware of changes. The proposed solution enables topology hiding, recovery from IMS nodes failure, session continuity, and scaling.
2004 IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communications
2010 IEEE 4th International Conference on Internet Multimedia Services Architecture and Application, 2010
... Environment) has been proposed by ITU-T SG13 as one of the NGN capabilities [4]. The primary ... more ... Environment) has been proposed by ITU-T SG13 as one of the NGN capabilities [4]. The primary goal of NGN OSE is to enable a service environment for flexible and agile service creation, execution and management based on an open service platform concept, ie, an ...
2011 IEEE Symposium on Computers and Communications (ISCC), 2011
The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP ... more The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP based network, has been the subject of considerable attention for several years. While there have been tremendous efforts to develop its architecture and protocols, especially for IMS, a key technology of the NGN, its wide deployment is still a long way off. However, efforts to create
Mobile networking technology seeks to preserve the user experience as the user moves and thereby ... more Mobile networking technology seeks to preserve the user experience as the user moves and thereby crosses from one network into another. A mobility event is the result of one network connection path being replaced by another via the rebinding of common system properties that may happen at any one of several protocol layers of the mobile. The rebinding is a sequential process and each process takes finite amount of time. This overall process results in generating a period of time in which network service is degraded by transient data loss and increased end-to-end delay. Formal techniques to characterize this problem and to develop optimization methodologies for these processes have never been studied as part of a systematic framework for mobility solutions. This dissertation develops a systematic systems model that analyzes the systems properties associated with a mobility event and characterizes several systems optimization techniques for these processes. The proposed formal mobility...
IEEE Wireless Communications and Networking Conference, 2005
The integrated networking technology prototype demonstrates the capability of several emerging ne... more The integrated networking technology prototype demonstrates the capability of several emerging networking technologies to operate together seamlessly to enhance network services targeted for dynamic mobile environments such as those found in the battlefield. The prototype consists of four technologies: (1) autoconfiguration technology supports autonomous and rapid network deployment and configuration; (2) self-managed virtual network (SMVN) technology provides virtual networking capabilities
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)
In this work, we measure Wireless Local Area Network (WLAN) voice performance and capacity. While... more In this work, we measure Wireless Local Area Network (WLAN) voice performance and capacity. While most WLAN applications today are data centric, the growing popularity of Voice over IP (VoIP) applications and the trend towards convergence with cellular networks will catalyze increased voice traffic. Since voice applications compete not only with each other, but also with data applications for WLAN bandwidth, quantifying voice performance and capacity in the presence of simultaneous data traffic is an important issue. We offer a practical investigation of the 802.11b MAC layer's ability to support simultaneous voice and data applications. We quantify VoIP capacity for standard WLAN networks, indicative of those already in the field, as well as evaluate the practical benefits of implementing backoff control and priority queuing at the access point. Conclusions are drawn based on an extensive set of real-world measurements conducted using off-theshelf equipment in an experimental testbed.
This document introduces a framework for mobility management protocols in terms of their key, abs... more This document introduces a framework for mobility management protocols in terms of their key, abstract logical functions. We explain how the framework is capable of presenting a unified view, reducing the clutter that prevents a casual reader from understanding the commonalities between different approaches in mobility management. A first order application of this framework is to enable us to examine previously standardized mobility management protocols, such as MIPv6 and PMIPv6 (as well as several of their extensions), and describe their core functionality in terms of different configurations of the logical functions defined by the framework. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts.
2006 3rd International Conference on Broadband Communications, Networks and Systems, 2006
Page 1. #Currently with Motorola Network Discovery Mechanisms for Fast-handoff Ashutosh Dutta, Su... more Page 1. #Currently with Motorola Network Discovery Mechanisms for Fast-handoff Ashutosh Dutta, Sunil Madhani#, Tao Zhang Telcordia Technologies Yoshihiro Ohba, Kenichi Taniuchi Toshiba America Research Inc. Henning Schulzrinne, Columbia University ...
IEEE Communications Magazine, 2012
Dual-mode handsets and multimode terminals are generating demand for solutions that enable conver... more Dual-mode handsets and multimode terminals are generating demand for solutions that enable convergence and seamless handover across heterogeneous access networks. The IEEE 802.21 working group is creating a framework that defines a Media Independent Handover Function (MIHF), facilitates the handover across heterogeneous access networks and help mobile users to experience a better performance during seamless handover. We also summarize a Media-independent Pre-Authentication (MPA) mechanism currently under discussion within the IETF and can be used to optimize handover performance. We present the 802.21 framework and the MPA technique and show how they can be integrated to improve the handover performance. We also describe a test-bed implementation and discuss experimental handover performance results of an 802.21-based approach in conjunction with MPA.
Wireless Pers. Multimedia …
Global IP mobility solutions using protocols like Mobile IP (MIP) and SIP are not optimized to ha... more Global IP mobility solutions using protocols like Mobile IP (MIP) and SIP are not optimized to handle micro-mobility management, where low-latency handoffs are essential, to avoid inefficiencies and performance degradation. Host based routing (HBR) schemes, such as HAWAII, ...