In this paper, we develop a uniform framework to provide a cost analysis of location update and search operations for a class of degradable location management algorithms in personal communication service (PCS) networks for tracking mobile users in the two-tier HLR (Home Location Register)–VLR (Visitor Location Register) structure. Depending on the algorithm employed, the PCS may be in a degrad...

In this paper, we propose an adaptive mobility management scheme for minimizing signaling costs in Hierarchical Mobile IPv6 (HMIPv6) networks. In our proposal, if the mobile node’s mobility is not local, the mobile node sends location update messages to correspondent nodes in the same way as Mobile IPv6 (MIPv6). After the creation of a spatial locality of the mobile node’s movement, the mobile ...

We consider the minimum spanning tree problem in a setting where information about the edge weights of the given graph is uncertain. Initially, for each edge e of the graph only a set Ae, called an uncertainty area, that contains the actual edge weight we is known. The algorithm can ‘update’ e to obtain the edge weight we ∈ Ae. The task is to output the edge set of a minimum spanning tree after...

Developing an efficient location management technique is an important step in working towards the determination of an optimal solution to the problem of managing mobility. Given the irregular nature of cell sizes in a cellular network, the behavior of mobile movement changes from cell to cell and from user to user. Thus, the need for designing an adaptive algorithm for tracking a roaming mobile...

Network Mobility Basic Support Protocol (NEMO BSP) is considered as the most widespread network mobility protocol at the present time which is a logical extension of the MIPv6 operation. Hence, Location Update (LU) procedure of NEMO BSP is almost similar to MIPv6 registration apart from setting of the MR flag and sending of prefix in the Binding Update (BU). However, in NEMO network, providing ...

In geographical routing, each node takes the data forwarding decision based on the location information of its one-hop neighbors. Dissemination of location information is the key function of the geographic routing. The location error due to the node mobility models has direct impact on the geographical routing. Node mobility is a great challenge to the beacon based location broadcasting schemes...

Personal Communication Systems (PCS) enable people to communicate independent of their location. For tracking the location of mobile users the system must maintain a Location Management mechanism, which maps user addresses to their current location. The increasing population of mobile users leads to congestion problems in these systems, and motivates the development of more eecient management s...

Critical to low-vision navigation are the abilities to recover scale and update a 3-D representation of space. In order to investigate whether these abilities are present under low-vision conditions, we employed the triangulation task of eyes-closed indirect walking to previously viewed targets on the ground. This task requires that the observer continually update the location of the target wit...

요 약 Location management is very important in location based services to provide services to the mobile users like banking, city guides and many more. Ubiquitous and mobile devices are the source of data in location management and its significant operations are update and search method. Some studies to improve these were presented by using optimal sequential paging, location area scheme and hier...