Optimization of wireless resources for personal communications mobility tracking
IEEE/ACM Transactions on Networking (TON)
Movement-based location update and selective paging for PCS networks
IEEE/ACM Transactions on Networking (TON)
Computer networks (3rd ed.)
Mobile users: to update or not to update?
Wireless Networks
Minimizing the average cost of paging under delay constraints
Wireless Networks
LATS: a load-adaptive threshold scheme for tracking mobile users
IEEE/ACM Transactions on Networking (TON)
IEEE Transactions on Parallel and Distributed Systems
CIT'04 Proceedings of the 7th international conference on Intelligent Information Technology
A dynamic paging scheme for minimizing signaling costs in hierarchical mobile IPv6 networks
ICDCIT'06 Proceedings of the Third international conference on Distributed Computing and Internet Technology
A location-based mobility tracking scheme for PCS networks
Computer Communications
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The minimization of the wireless cost of tracking mobile users is a crucial issue in wireless networks. Some of the previous strategies addressing this issue leave an open gap, by requiring the use of information that is not generally available to the user (for example, the distance traveled by the user). For this reason, both the implementation of some of these strategies and the performance comparison to existing strategies is not clear. In this work we propose to close this gap by the use of Cell Identification Codes (CIC) for tracking mobile users. Each cell periodically broadcasts a short message which identifies the cell and its orientation relatively to other cells in the network. This information is used by the users to efficiently update their location. We propose several cell identification encoding schemes, which are used to implement different tracking strategies, and analyze the amount of information required by each tracking strategy. One of our major results is that there is no need to transmit a code which is unique for each cell. For example, a 3 bits CIC is sufficient to implement a distance-based tracking strategy in a two-dimensional system. In addition, we propose a combination of timer and movement tracking strategy, based on either a one-bit or a two-bit CIC, depending on system topology and user mobility. An important property of our framework is that the overall performance cost, and hence its comparison to existing methods, is evaluated for each tracking strategy. The CIC-based strategies are shown to outperform the geographic-based method currently used in existing networks, and the timer-based method, over a wide range of parameters. Moreover, this superiority increases as the number of users per cell increases.