Distributed sensing, computing and communication capabilities of wireless sensor networks require, in most situations, an efficient node localization procedure. In the case of random deployments in harsh or hostile environments, a general localization process within global coordinates is based on a set of anchor nodes able to determine their own position using GPS receivers. In this paper we pr...

This specification defines a new mobility option, the Quality-ofService (QoS) option, for Proxy Mobile IPv6. This option can be used by the local mobility anchor and the mobile access gateway for negotiating Quality-of-Service parameters for a mobile node’s IP flows. The negotiated QoS parameters can be used for QoS policing and marking of packets to enforce QoS differentiation on the path betw...

To improve the localization precision of nodes in Wireless sensor network (WSN), this paper analyses the source of the localization error in the least square localization algorithm (LSL), and it can be concluded that the minimum cumulative relative distance error of the benchmark anchor node directly influence the localization precision. Based on the analyses, this paper proposes an improved le...

Iterative localization is designed to more free nodes when the number of anchor is few. When all localizable nodes are localized in the primitive iterative localization, the reciprocal refinement localization is proposed to refine and improve the node positions. To improve the localization accuracy, the position error of pseudo anchor is transformed to the equivalent range error, the optimal we...

In recent years, wireless sensor networks have drawn great attention. This type of network is composed of a large number of sensor nodes which are able to sense, process and communicate. Besides, they are used in various fields such as emergency relief in disasters, monitoring the environment, military affairs and etc. Sensor nodes collect environmental data by using their sensors and send them...

Wireless sensor networks (WSN) are widely used in many environments to perform various monitoring tasks. In many such tasks, node location exists as permanent system parameter and to determine the exact position or location of sensor nodes in WSN is a big challenge to achieve. To achieve this challenge, various algorithms have been implemented to provide better accuracy even if anchor node dens...

In recent year node localization is one of the most important issue since it plays a critical role in many situation. The aim of the sensor network localization problem is to determine positions of all sensor nodes in a network given certain pair wise noisy distance measurements and some anchor node positions using distributed localization algorithm based on second-order cone programming relaxa...

This memo defines a portion of the Proxy Mobile IPv6 Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, the Proxy Mobile IPv6 MIB can be used to monitor and control the mobile access gateway (MAG) and the local mobility anchor (LMA) functions of a Proxy Mobile IPv6 (PMIPv6) entity.

As DV-Hop algorithm estimates distance by distance vector exchanging, positioning process is vulnerable to devastate wormhole attacking. An improved DV-Hop algorithm (AWADV-Hop) which resists wormhole attack is proposed, based on the original algorithm in this paper. To solve the problem that hops and the average distance per hop is the most vulnerable to wormhole attack in DV-Hop. This paper f...

This memo defines a portion of the Proxy Mobile IPv6 Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, the Proxy Mobile IPv6 MIB can be used to monitor and control the mobile access gateway (MAG) and the local mobility anchor (LMA) functions of a Proxy Mobile IPv6 (PMIPv6) entity.