ÐWhen the location information for a mobile user in the Home Location Register (HLR) is corrupted or obsolete, the new arriving calls to the user may be lost. In order to minimize the effect of such HLR mobility database failure, a location update scheme called period location updating is proposed, and the cost analysis is performed. Analytical results for the failure recovery time distribution...

In this paper, we have developed an analytical model to evaluate the performance of home agent, quorum based, and grid location service update schemes using Markov chain. The model evaluates the performance in terms of the cost of updates and queries. The cost of updates is computed in terms of the hops used in updating a location. The model also considers selective queries for destination sear...

Recently, location systems using RFID technology have been studied in indoor environments. However, the existing techniques require high computational cost to compute the location of a moving object because they compare the location proximity of all reference tags and objects. In this paper, we propose an RFID based location positioning scheme using event filtering, which reduces the computatio...

| In cellular wireless networks, paging and user location update are used to deliver calls to mobile users. We propose two new user location update methods. One method which improves the movement based user location update scheme, exploits the locality of user movement patterns. Another method performs distance-based location update based on LA such that it simpliies implementation. To compare ...

The standard technique for cellular networks is to decrease radio cell size, thereby maintaining a supportable subscriber density. However, smaller cell sizes result in increased signaling for location management procedures, which reduces the bandwidth available for user traffic and increases the cost. A dynamic distance-based location update with sequential paging with no delay constraint algo...

In this study, we propose an improved version of the dynamic movement-based location update scheme that stores all cells visited by the MS, and their neighboring cells, to reduce the location update cost of the dynamic movement-based location update scheme. We show that a significant reduction in the location update cost is achieved in our scheme. We also show that our scheme has optimal total ...

-We study a dynamic mobility management scheme: the movement-based location update scheme. An analytical model is applied to formulate the costs of location update and paging in the movement-based location update scheme. The problem of minimizing the total cost is formulated as an optimization problem that finds the optimal threshold in the movement-based location update scheme. We prove that t...

An information-theoretic framework is developed for optimal location management in multi-system, fourth generation ( ) wireless networks. The framework envisions that each individual sub-system operates fairly independently, and does not require public knowledge of individual sub-network topologies. To capture the variation in paging and location update costs in this heterogeneous environment, ...

Mobile devices are becoming the primary platforms for many users who always roam around when accessing the cloud computing services. From this, the cloud computing is integrated into the mobile environment by introducing a new paradigm, mobile cloud computing. In the context of mobile computing, the battery life of mobile device is limited, and it is important to balance the mobility performanc...

In wireless mobile networks, particularly in PCS networks, new calls to a portable may be lost due to the incorrect location information in the mobility database, which leads to an database failure. Such database failure can be recovered either through the portable’s registration initiation, the deregistration when it crosses the location area boundary or the active location update. In this pap...