Localization technology is one of the key supporting technologies in wireless sensor networks. In this paper, a two-hop collaborative multilateral localization algorithm is proposed to localization issues for wireless sensor networks. The algorithm applies anchor nodes within two hops to localize unknown nodes, and uses the minimum range error estimation method to compute coordinates of the unk...

Mobile IPv6 allows a Mobile Node to remain reachable by a Correspondent Node while roaming from one network to another network. In Mobile IPv6, a Mobile Node directly updates its current location information to a Correspondent Node using a route optimization method. Route optimization helps to culminate the packet delay incurred due to suboptimal route traversed by the packets from a Correspond...

Mobile IP is the proposed standard for IP mobility support. A mobile node registers its current location with its home agent when it moves across IP subnets in a foreign network. When a mobile node is far away from home, registration with its home agent can cause a long handoo delay. We have extended Mobile IP with routing agents. The routing agent of a mobile node serves as the current locatio...

In Hierarchical Mobile IPv6 (HMIPv6) networks, the mobility anchor point (MAP) is introduced to localize binding update messages destined to the home agent. In a large-scale wireless/mobile network, multiple MAPs may be deployed in order to provide more scalable and robust mobile services. In this case, it is important for a mobile node (MN) to select the most appropriate MAP among them. In thi...

The Mobile IPv6 protocol includes a route optimization mechanism that improves routing efficiency by informing correspondent nodes about the current care-of address of the mobile node. Mobile node physical location may be associated with its topologically correct IP address. Revealing the mobile node’s care-of address can therefore be used to track the mobile with certain accuracy, which compro...

While localization is essential to many applications, there are quantities of wireless nodes whose accurate locations remain unknown or hard to tell. As a remedy, this paper is leveraging a GPS-capable Android handset that features portability and sufficient computing capability to collect data and display localization results thereof. Our objective is to locate the unknown nodes under irregula...

A Wireless Sensor Network (WSN) consists of many sensors that communicate wirelessly to monitor a physical region. Location information is critical essential and indispensable for many applications of WSNs. A promising solution for localizing statically deployed sensors is to benefit from mobile location-aware nodes called beacons. However, the essential problem is to find the optimum path that...

One of the most significant challenges introduced by mobile networks is coping with the unpredictable motion and the unreliable behavior of mobile nodes. In this paper, we define the Virtual Mobile Node Abstraction, which consists of robust virtual nodes that are both predictable and reliable. We present the Mobile Point Emulator, a new algorithm that implements the Virtual Mobile Node Abstract...

Authentication, Authorization, and Accounting (AAA) servers, such as RADIUS and DIAMETER, are in use within the Internet today to provide authentication and authorization services for dial-up computers. Mobile IP for IPv4 requires strong authentication between the mobile node and its home agent. When the mobile node shares an AAA Security Association with its home AAA server, however, it is pos...