The Experts below are selected from a list of 7077 Experts worldwide ranked by ideXlab platform
U Narayanan - One of the best experts on this subject based on the ideXlab platform.
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performance analysis of Mobility Support in ipv4 ipv6 mixed wireless networks
IEEE Transactions on Vehicular Technology, 2010Co-Authors: U NarayananAbstract:The rapid growth of the Internet has led to the anticipated depletion of addresses in the current version of the Internet protocol (IP), i.e., IPv4. This depletion has given rise to a newer version of the IP, i.e., IP version 6 (IPv6). IPv6 provides sufficient address space to meet the predicted increase of the Internet. Since IPv4 has already widely been deployed, it is required that the existing IPv4 and the newly added IPv6 can coexist and interoperate. Due to the incompatibility of the IPv4 and IPv6 headers, various mechanisms have been proposed to Support the interoperability between IPv4 and IPv6. However, they are mostly designed for a static environment. Mobility Support of mobile terminals in a mixed IPv4/IPv6 environment remains largely unexplored. It introduces additional overhead and delay to communications. In this paper, we analyze various handoff scenarios for a dual-stack mobile node with a predominant IPv6 home address roaming in a mixed IPv4/IPv6 environment. We investigate how handoffs can be Supported and derive the handoff procedures for all scenarios. In addition, we analyze the impact of Mobility Support on the system performance in terms of handoff-signaling cost, handoff delay, and handoff-failure probability using our designed analytical models. Different traffic and Mobility patterns are taken into account in the performance analysis. Numerical results are provided to demonstrate the performance of all handoff scenarios. Conclusions from this study can give great in-depth understanding and insights into designing new cost-effective Mobility Support mechanisms for IPv4/IPv6 transition and interoperability.
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Performance Analysis of Mobility Support in IPv4/IPv6 Mixed Wireless Networks
IEEE Transactions on Vehicular Technology, 2010Co-Authors: U NarayananAbstract:The rapid growth of the Internet has led to the anticipated depletion of addresses in the current version of the Internet protocol (IP), i.e., IPv4. This depletion has given rise to a newer version of the IP, i.e., IP version 6 (IPv6). IPv6 provides sufficient address space to meet the predicted increase of the Internet. Since IPv4 has already widely been deployed, it is required that the existing IPv4 and the newly added IPv6 can coexist and interoperate. Due to the incompatibility of the IPv4 and IPv6 headers, various mechanisms have been proposed to Support the interoperability between IPv4 and IPv6. However, they are mostly designed for a static environment. Mobility Support of mobile terminals in a mixed IPv4/IPv6 environment remains largely unexplored. It introduces additional overhead and delay to communications. In this paper, we analyze various handoff scenarios for a dual-stack mobile node with a predominant IPv6 home address roaming in a mixed IPv4/IPv6 environment. We investigate how handoffs can be Supported and derive the handoff procedures for all scenarios. In addition, we analyze the impact of Mobility Support on the system performance in terms of handoff-signaling cost, handoff delay, and handoff-failure probability using our designed analytical models. Different traffic and Mobility patterns are taken into account in the performance analysis. Numerical results are provided to demonstrate the performance of all handoff scenarios. Conclusions from this study can give great in-depth understanding and insights into designing new cost-effective Mobility Support mechanisms for IPv4/IPv6 transition and interoperability.
Deguang Le - One of the best experts on this subject based on the ideXlab platform.
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Location-based Mobility Support for 6LoWPAN wireless sensor networks
Journal of Network and Computer Applications, 2015Co-Authors: Xiaonan Wang, Deguang LeAbstract:A 6LoWPAN WSN has Mobility, so it can obtain more extensive application space only if it provides good Mobility Support. However, the existing Mobility protocols cannot work efficiently in 6LoWPAN WSN due to long handover latency and high packet loss rate. Therefore, this paper proposes a location-based Mobility Support scheme for 6LoWPAN WSN in order to reduce the handover delay and packet loss. In this scheme, the architecture based on cluster domains is proposed and based on this architecture the Mobility Support algorithm is presented. In this algorithm, the handover in the network layer (L3) and the one in the link layer (L2) are performed simultaneously. Also, a mobile node neither needs a care-of address nor participates in the handover process, so the packet loss caused by the address change and the node Mobility is avoided. Moreover, a cluster head?s IPv6 address includes the location information, so the routing path reaching a destination cluster head can be automatically established without routing discovery. As a result, the Mobility handover performance is improved. The performance of this scheme is evaluated, and the data results show that this scheme reduces the handover cost, shortens the handover delay and lowers the packet loss rate.
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A review of Mobility Support paradigms for the internet
IEEE Communications Surveys and Tutorials, 2006Co-Authors: Deguang Le, Xiaoming Fu, Dieter HogrefeAbstract:With the development of mobile communications and Internet technolo- gy, there is a strong need to provide connectivity for roaming devices to continuously communicate with other devices on the Internet, at any time and anywhere. The key issue of this vision is how to Support Mobility in TCP/IP networks. In this article we review the TCP/IP protocol stack and analyze the problems associated with it in the mobile environment. We then investigate the Mobility Support techniques and existing solutions for providing Mobility Support on the Internet. We classify the proposed solu- tions based on the protocol layers and present paradigms for each category of layer. We also provide a comparison of the different solutions belonging to different categories, including their advantages and disadvantages. Results have shown that there is no single solution that perfectly addresses Mobility Support for the Internet. Finally, we conclude this survey with a recommendation of features that ought to be met in Internet Mobility sup- port.
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a review of Mobility Support paradigms for the internet
IEEE Communications Surveys and Tutorials, 2006Co-Authors: Deguang Le, Xiaoming Fu, Dieter HogrefeAbstract:Abstract With the development of mobile communication and Internet technology, there is a strong need to provide connectivity for roaming devices to communicate to other communication end point in the Internet at any time and anywhere. The key issue of this vision is how to Support Mobility in TCP/IP networks. In this paper, we review the TCP/IP protocol stack and analyze the problems associated with it in a mobile environment. We then investigate the Mobility Support techniques and existing solutions to provide Mobility Support in the Internet. We classify the proposed solutions based on the protocol layers and present examples for each category. We also provide a comparison of the different solutions belonging to different categories and in the same category, including their advantages and disadvantages, and conclude that there is no single solution perfectly addresses Mobility Support for the Internet. We conclude this survey with a recommendation of features that need to be satisfied in Internet Mobility Support.
Muhammad Taqi Raza - One of the best experts on this subject based on the ideXlab platform.
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lowmob intra pan Mobility Support schemes for 6lowpan
Sensors, 2009Co-Authors: Muhammad Taqi RazaAbstract:Mobility in 6LoWPAN (IPv6 over Low Power Personal Area Networks) is being utilized in realizing many applications where sensor nodes, while moving, sense and transmit the gathered data to a monitoring server. By employing IEEE802.15.4 as a baseline for the link layer technology, 6LoWPAN implies low data rate and low power consumption with periodic sleep and wakeups for sensor nodes, without requiring them to incorporate complex hardware. Also enabling sensor nodes with IPv6 ensures that the sensor data can be accessed anytime and anywhere from the world. Several existing Mobility-related schemes like HMIPv6, MIPv6, HAWAII, and Cellular IP require active participation of mobile nodes in the Mobility signaling, thus leading to the Mobility-related changes in the protocol stack of mobile nodes. In this paper, we present LoWMob, which is a network-based Mobility scheme for mobile 6LoWPAN nodes in which the Mobility of 6LoWPAN nodes is handled at the network-side. LoWMob ensures multi-hop communication between gateways and mobile nodes with the help of the static nodes within a 6LoWPAN. In order to reduce the signaling overhead of static nodes for Supporting mobile nodes, LoWMob proposes a Mobility Support packet format at the adaptation layer of 6LoWPAN. Also we present a distributed version of LoWMob, named as DLoWMob (or Distributed LoWMob), which employs Mobility Support Points (MSPs) to distribute the traffic concentration at the gateways and to optimize the multi-hop routing path between source and destination nodes in a 6LoWPAN. Moreover, we have also discussed the security considerations for our proposed Mobility schemes. The performance of our proposed schemes is evaluated in terms of Mobility signaling costs, end-to-end delay, and packet success ratio.
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network assisted Mobility Support for 6lowpan
Consumer Communications and Networking Conference, 2009Co-Authors: S Saif M Shams, Ali Hammad Akbar, Muhammad Taqi RazaAbstract:This paper presents a network-assisted Mobility Support scheme for 6LoWPAN nodes, which enables multi-hop communication between the Gateway (GW) and the Mobile 6LoWPAN devices (MNs), with minimum Mobility related signaling at the MN's end as compared to conventional Mobility related protocols like MIPv6. The scheme provides Mobility Support to the MNs with the help of low cost static 6LoWPAN devices (SNs) which can be deployed in large numbers. In order to reduce the handover latency, the MN in the proposed scheme is assigned a fixed address which remains unchanged during its course of movement within the network. Moreover the scheme aims to reduce packets loss of the MN by predicting its future location and having a provision of buffering its packet at SNs when needed. The signaling overhead consumption needed to Support a MN is determined through analytical modeling.
Ljiljana Simic - One of the best experts on this subject based on the ideXlab platform.
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network control overhead of Mobility Support in millimeter wave urban cellular networks
Proceedings of the 2nd ACM Workshop on Millimeter Wave Networks and Sensing Systems, 2018Co-Authors: Aleksandar Ichkov, Frenki Malloli, Petri Mahonen, Ljiljana SimicAbstract:Millimeter-wave (mm-wave) bands promise multi-Gbps rates for future cellular networks by utilizing high-gain beamforming antenna arrays. However, the directional mm-wave transmissions are prone to blockage, making seamless network coverage and Mobility Support very challenging. In this paper, we investigate the network control overhead requirements for Mobility Support in mm-wave urban cellular networks, using ray-tracing and realistic vehicular and pedestrian Mobility models in Frankfurt and Seoul. We show that pedestrian Mobility entails less network control overhead compared to vehicular, and that the latter is strongly dependent on the city layout, i.e. frequency of street intersections and traffic lights. This highlights the importance of realistically modeling the user (UE) trajectory in designing Mobility Support mechanisms. Our results also show that the rate of tracking events - i.e. adjusting the antenna alignment to maintain connectivity on the same \mboxline-of-sight (LOS) or \mboxnon-LOS link - is significantly higher than the rate of re-steering to a secondary link on the serving base station (BS), or handovers to another BS. This is due to the coverage being chiefly limited by building blockages, making it typically most attractive to provide Mobility Support via antenna realignment of the serving LOS link, emphasizing that UE tracking will be critical in mm-wave urban cellular network.
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mmNets@MobiCom - Network Control Overhead of Mobility Support in Millimeter-Wave Urban Cellular Networks
Proceedings of the 2nd ACM Workshop on Millimeter Wave Networks and Sensing Systems - mmNets '18, 2018Co-Authors: Aleksandar Ichkov, Frenki Malloli, Petri Mahonen, Ljiljana SimicAbstract:Millimeter-wave (mm-wave) bands promise multi-Gbps rates for future cellular networks by utilizing high-gain beamforming antenna arrays. However, the directional mm-wave transmissions are prone to blockage, making seamless network coverage and Mobility Support very challenging. In this paper, we investigate the network control overhead requirements for Mobility Support in mm-wave urban cellular networks, using ray-tracing and realistic vehicular and pedestrian Mobility models in Frankfurt and Seoul. We show that pedestrian Mobility entails less network control overhead compared to vehicular, and that the latter is strongly dependent on the city layout, i.e. frequency of street intersections and traffic lights. This highlights the importance of realistically modeling the user (UE) trajectory in designing Mobility Support mechanisms. Our results also show that the rate of tracking events - i.e. adjusting the antenna alignment to maintain connectivity on the same \mboxline-of-sight (LOS) or \mboxnon-LOS link - is significantly higher than the rate of re-steering to a secondary link on the serving base station (BS), or handovers to another BS. This is due to the coverage being chiefly limited by building blockages, making it typically most attractive to provide Mobility Support via antenna realignment of the serving LOS link, emphasizing that UE tracking will be critical in mm-wave urban cellular network.
Dieter Hogrefe - One of the best experts on this subject based on the ideXlab platform.
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A review of Mobility Support paradigms for the internet
IEEE Communications Surveys and Tutorials, 2006Co-Authors: Deguang Le, Xiaoming Fu, Dieter HogrefeAbstract:With the development of mobile communications and Internet technolo- gy, there is a strong need to provide connectivity for roaming devices to continuously communicate with other devices on the Internet, at any time and anywhere. The key issue of this vision is how to Support Mobility in TCP/IP networks. In this article we review the TCP/IP protocol stack and analyze the problems associated with it in the mobile environment. We then investigate the Mobility Support techniques and existing solutions for providing Mobility Support on the Internet. We classify the proposed solu- tions based on the protocol layers and present paradigms for each category of layer. We also provide a comparison of the different solutions belonging to different categories, including their advantages and disadvantages. Results have shown that there is no single solution that perfectly addresses Mobility Support for the Internet. Finally, we conclude this survey with a recommendation of features that ought to be met in Internet Mobility sup- port.
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a review of Mobility Support paradigms for the internet
IEEE Communications Surveys and Tutorials, 2006Co-Authors: Deguang Le, Xiaoming Fu, Dieter HogrefeAbstract:Abstract With the development of mobile communication and Internet technology, there is a strong need to provide connectivity for roaming devices to communicate to other communication end point in the Internet at any time and anywhere. The key issue of this vision is how to Support Mobility in TCP/IP networks. In this paper, we review the TCP/IP protocol stack and analyze the problems associated with it in a mobile environment. We then investigate the Mobility Support techniques and existing solutions to provide Mobility Support in the Internet. We classify the proposed solutions based on the protocol layers and present examples for each category. We also provide a comparison of the different solutions belonging to different categories and in the same category, including their advantages and disadvantages, and conclude that there is no single solution perfectly addresses Mobility Support for the Internet. We conclude this survey with a recommendation of features that need to be satisfied in Internet Mobility Support.