Authentication Mechanism for Fast Handover PMIPv6 Networks

Authentication Mechanism for Fast Handover PMIPv6 Networks N.S.Nandhinee S.Kayalvizhi    Abstract —The Internet Engineering Task Force (IETF) proposed a host-based mobility management protocol, called Mobile IPv6 (MIPv6) protocol for mobile nodes (MNs) to maintain continuous service when they move among different foreign networks. However, Mobile IPv6 does not provide good service for real-time applications because it causes longer disruptions when the handoff takes place. Recently, the IETF NETLMM working group developed a network-based localized mobility management protocol called Proxy Mobile IPv6 (PMIPv6) to reduce the handoff latency of MIPv6. PMIPv6 still suffers from packet loss problem and signaling overhead. This paper performs a Bicasting scheme to reduce packet loss, use the piggyback technique to reduce the signaling overhead, also provides Authentication mechanism for protecting valid user from attacks in PMIPv6 networks. Keywords—Authentication, bicasting, handover, piggyback, Proxy Mobile IPv6 (PMIPv6) 1 . Introduction As wireless technologies have grown, all the people want to use wireless networks while moving from one place to another. At the same time Mobile MIPv6 was developed by the internet Engineering Task Force (IETF) to support the Mobile Node. Even after introducing the Mobile IPv6 Mobile Nodes (MNs) did not receive any data packets when it performs the handover that involves , IP address configuration, movement detection and location update latencies. To reduce the handover latency, Fast Handover has been developed. Fast handover performs the movement detection and IP address whenever the Mobile Nodes move from one location to another. Therefore Fast handover protocol reduces the handover latency. However , MIPv6 cannot satisfy all the requirements of real time applications such as video streaming service and voice over internet protocol (VoIP) service due to its high handover latency. To address this problem, the Internet Engineering Task Force (IETF) NETLMM working gro up developed a network based localized mobility management protocol called Proxy Mobile IPv6 (PMIPv6) to reduce the handoff latency of MIPv6.Moreover, PMIPv6 provides the IP with the mobility to support MNs without requiring its participation in any mobility-related signaling. Although PMIPv6 reduces lots of handoff latency compared with MIPv6, it still suffers from packet loss, signaling overhead and inefficient authentication procedure problems during handoff. This is because PMIPv6 does not use any buffer mechanism during the handoff procedure and performs the authentication and registration phases separately. Therefore this paper used a bicasting scheme for packet loss and piggybacking technique for signaling overhead. 2. Related works 2.1. survey on fast handover Chaung and Lee [2] proposed handoff schemes for PMIPv6 networks perform the authentication and registration phases separately, resulting in longer handoff latency. A. Pre-Handoff procedure The movements of an MN is det ected using the MAG and it performs mobility-related signaling with the LMA in place of the MN. The pre-handoff phase starts only when the MN is going to leave the range of the serving MAG (i.e., MAG1). First, MAG1 sends a handoff initial (HI) message to the target MAG(i.e., MN-ID) and the address of the target MAG. Then , MAG2 sends back a handoff acknowledgement (HACK) message to MAG1, and then a bi-directional tunnel is built between MAG1 and MAG2. After the bi-directional tunnel is built , the buffer of MAG2 prepares to buffer.

Critical analysis essay Dissertation Example | Topics and Well Written Essays - 500 words

Critical analysis essay - Dissertation Example The book is a historical work that uses statistical data as reference for representing views and opinion. The presentation of data in the book is narrative and creative but the data incorporated are comprehensive information and considered historically important in nature (Yergin and Stanislaw ch.5; 14). Based on the date presented, the book can be viewed as both historically and economically essential. The authors Yergin and Stanislaw presented a different perspective on the various concepts in the market through their own definition of terms such as globalization etc. Globalization is perceived as the periods of domination of free markets and is positive based on the effect it can bring about to the standard of living of the people. In addition the authors believe in the accomplishments and importance of capitalism (Yergin and Stanislaw ch.13). The views and opinions of the authors are evident in the book. This can be considered as an indication that the book is meant to make a sta tement and not a historical narrative.

The painting Drinnen und Draussen, by George Grosz Essay

The painting Drinnen und Draussen, by George Grosz - Essay Example The essay "The painting Drinnen und Draussen, by George Grosz" explores George Grosz's painting called Drinnen und Draussen. There were more shades and the images of the people were not clear. A pillar supposedly served as a dividing wall to visually represent people from the inside, dressed in coats and tie, one with a cigar, and apparently dining in style. These people could be seen as having a good time surrounded by sophisticated and classy ladies. Other objects were clearly painted such as a lamp, a bucket of liquor, an ash tray, to name a few. The faces of the people are all clear exemplifying various expressions of smiling, waiting patiently, listening intently. The colors were also disparate with the outside people being painted in grey, blue, brown, touches of light greens and pinks in matte. The inside portion was more vividly colored in reds, tan, blue, white with clearer and illumined backdrop. One could deduce that the painter intended to relay the message that people se en inside dining places had the luxuries of availing the best of life. The people inside with faces painted in round, clear and donning happy expressions and are well-dressed signify wealth, luxury, richness. The dividing wall also symbolize the demarcation between the rich and the poor – as people from the outside manifest poverty, wanting in financial resources and appropriate access to health care. Their faces were painted as blurred symbolizing obscurity, loss of identity, nameless. The realities of life at the time.