– Many studies have been performed to improve the efficiency of mobile IP. Hierarchical MIPv6 (HMIPv6) was proposed due to the lack of MIPv6. The new protocol, that is, 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, it can affect the whole network owing to concentration phase of registration...

For extending the lifetime of a mobility session, the Proxy Mobile IPv6 specification requires the mobile access gateway to send a Proxy Binding Update message to the local mobility anchor on a per-session basis. In the absence of signaling semantics for performing operations with group-specific scope, this results in a significant amount of signaling traffic on a periodic basis between a given...

Agent based micro-mobility protocols such as Hierarchical Mobile IPv6 deploy special IPv6 nodes called Mobility Agents that act as an anchor point between the Mobile Node and the Home Agent providing localized mobility support. The location and the number of MAs deployed within the network can affect the performance of the protocol. This paper deals with the problem of Mobility Agent (MA) locat...

Due to the increasing use of wireless communications, infrastructure-less networks such as Delay Tolerant Networks (DTNs) should be highly considered. DTN is most suitable where there is an intermittent connection between communicating nodes such as wireless mobile ad hoc network nodes. In general, a message sending node in DTN copies the message and transmits it to nodes which it encounters. A...

Node localization technology is a key technology of WSN, and this paper proposes a rank sequence localization algorithm based on Voronoi and Spearman. First of all, the paper divides the localization space of WSN according to the Voronoi diagram, takes the polygon’s points, center of gravity and the boundary intersection as virtual anchor nodes, and builds the rank sequence list for virtual anc...

Location-aware techniques has become a hot research topic with great value in commercial and military applications. Cooperative localization, which utilizes multiple sensors in portable devices to estimate locations of the mobile users in the social networks, is one of the most promising solution for the indoor geo-location. Traditional cooperative localization methods are ranging based, they a...

Localization of nodes in a sensor network is essential for the following two reasons: (i) to know the location of a node reporting the occurrence of an event, and (ii) to initiate a prompt action whenever necessary. Different localization techniques have been proposed in the literature. Most of these techniques use three location aware nodes for localization of an unknown node. Moreover, the lo...

Abstract: This paper proposes a novel localization approach based on genetic algorithm for Wireless Sensor Networks. In this method, we use a new way to approximate the distance between anchor node and unknown node which is out of the anchor nodes’ communication radius. In addition, we use self-adapting genetic algorithm into localization, which will ensure it can produce the result as similar ...

This paper presents a newly proposed asynchronous time difference of arrival (A-TDOA) positioning system. Two major challenges for accurate location finding in indoor environments are the fine time resolution and high accuracy time synchronization. This paper proposes a new positioning method that resolves the time synchronization difficulty by measuring the time difference of arrival at a sing...

Considering analysis of localization algorithm in wireless sensor networks ,and problem of lager error in Distance Vector-Hop(DV-hop)localization algorithm is mainly due to the estimation error of the distance between unknown nodes and anchor nodes, a localization algorithm based on error correction and multi-hop is proposed to reduce location error. The distance-per-hop of anchor is fixed by a...