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Mobile IPv6 (MIPv6) is a presentative protocol which supports global IP mobility. MIPv6 causes a long handover latency that a mobile node (MN) doesnpsilat send or receive packets. This latency can be reduced by using Proxy Mobile IPv6 (PMIPv6). PMIPv6 is a protocol which network supports IP mobility without participation of the MN, and is studied in(More)
Wireless sensor networks are commonly used for critical security tasks such as intrusion or tamper detection, and therefore must be protected. To date, security of these networks relies mostly on key establishment and routing protocols. We present a new approach to key establishment, which combines a group-based distribution model and identity-based(More)
Hierarchical Mobile IPv6 (HMIPv6) has been proposed by the Internet Engineering Task Force (IETF) to reduce handoff latency and signaling overhead. In the new protocol, Mobility Anchor Point (MAP) receives all packets in place of Mobile Node (MN) and MAP services are transferred to Care of Address (CoA) of MN. However, a MAP may be a single point of(More)
There are two types of handovers for mobile users in the clustered cellular networks: inter-cluster and intra-cluster handovers. An inter-cluster handover which occurs as a result of mobile user’s migration between clusters gives rise to additional handover delay, because more complex handover mechanism should be performed by mobile network. In this paper,(More)
As wireless LANs and wireless terminals deployed, security and authentication, among other things, became important. We propose a mutual authentication scheme for access security among wireless terminals. We use user identification together with hardware identification in creating a certificate for the wireless access. And authentication is performed based(More)
The protection of wireless sensor networks is an important task, especially for critical situations such as intrusion detection, tamper monitoring, or military applications. To date, much of the emphasis on protecting sensor networks has focused on key management and secure routing. However, as sensors become more capable and ubiquitous, the need for more(More)
For the inter-LMA network environment in PMIPv6, location information of communicating Mobile Node(MN) and Correspondent Node(CN) is maintained in the different Local Mobility Anchor(LMA). Accordingly, when both MN and CN move to different MAGs simultaneously, race condition occurs in which updated location information of MN is forwarded to the previous MAG(More)
The scheme proposed in this thesis organizes dynamically clusters at the time of events occurrence and maintains them. The other side, the existing cluster based USN (ubiquitous sensor networks) organize at the network initial time in a lump. So the existing method causes of much energy exhaustion. Therefore the scheme proposed in this thesis can be more(More)
After a message is arrived at the destination, it’s copies can remain in the DTN. So, we propose the duplicated message reduction scheme based on the delivered message lists. Each node in the network maintains a list of messages that already arrived at the destination. Whenever two nodes are connected, they update their delivered message lists by exchanging(More)
Ubiquitous Sensor Networks (USN) environment is composed of dense nodes of Ad-Hoc network structure which has small size node, low power and low calculation ability. Sensor nodes have constraints in operation which small size and distribution features so that they should be operated using low power. In this paper we propose a grid computing scheme to solve(More)