Tracking mobile users with uncertain parameters

Naor, Zohar

doi:10.1145/345910.345929

Cited by 9 publications

(10 citation statements)

References 13 publications

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“…The scheme proposed in this paper is based on the ZN scheme [12]. The basic idea of the ZN scheme is that a mobile station makes use of a look-up table to perform location updates.…”

Section: The Scheme In Honeycomb Networkmentioning

confidence: 99%

“…Finally we analyze the validity of the simulation results in real networks. Since it has been claimed in [12] that the ZN scheme performs better than timer-based, geographic-based, and distance-based schemes, we only compare the proposed scheme with the ZN scheme.…”

Section: Simulationsmentioning

confidence: 99%

“…This work was enlightened by Naor's distanceand time-based location management scheme presented in his original work [12]. Our scheme has utilized the speed Fig.…”

Section: Summary and Future Workmentioning

confidence: 99%

“…Recently the author in [12] has proposed a distance-and time-based location management scheme, referred to as the ZN scheme hereafter, which uses a predefined look-up table for location updates. The table describes the relationship between the distance and the time: the distance decreases while the time increases.…”

Section: Introductionmentioning

confidence: 99%

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A speed-adaptive strategy for location management cost reduction in cellular networks

Wang

Zhang

2006

Wireless Netw

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A speed adaptive location management scheme will greatly reduce the cost of tracking mobile stations, because mobile stations can travel at a wide range of speeds. Recently, an elegant distance-and time-based scheme has been proposed. The scheme uses a look-up table which describes the relationship between the distance and the time: the distance decreases while the time increases. In the scheme, the paging area for a mobile station will be automatically reduced if the mobile station does not update its location over a certain time period. Therefore, the scheme performs well when a mobile station travels at a low speed. However, it does not perform well when the incoming call arrival rate is high or when the speed of a mobile station is high. To overcome those drawbacks, a novel speed-adaptive scheme is proposed in this paper. The proposed scheme uses an enhanced look-up table that consists of two parts: the distance in the first part increases while the time increases; in the second part, the distance decreases with the increasing time. By introducing the first part, the proposed scheme reduces the paging cost for a call arriving shortly after a location update, and adapts to the speed range of a mobile station. To reduce the paging cost further, a paging angle is introduced for high-speed mobile stations. Numerical simulations using various activity-based models and random walk models show that the proposed scheme performs well for mobile stations traveling at both high and low speeds.

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“…The scheme proposed in this paper is based on the ZN scheme [12]. The basic idea of the ZN scheme is that a mobile station makes use of a look-up table to perform location updates.…”

Section: The Scheme In Honeycomb Networkmentioning

confidence: 99%

Section: Simulationsmentioning

confidence: 99%

“…This work was enlightened by Naor's distanceand time-based location management scheme presented in his original work [12]. Our scheme has utilized the speed Fig.…”

Section: Summary and Future Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A speed-adaptive strategy for location management cost reduction in cellular networks

Wang

Zhang

2006

Wireless Netw

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“…The state-based location update technique [14], where an MT decides to update its location based on its current state, is another dynamic technique. The policies, which are the combination of the known techniques such as the time and distance-based schemes, are proposed in [6], [13].…”

Section: Introductionmentioning

confidence: 99%

User mobility pattern scheme for location update and paging in wireless systems

Clayirci¹,

Akyildiz

2002

IEEE Trans. on Mobile Comput.

102

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Abstract-The user mobility pattern (UMP) scheme is introduced for location update and paging in wireless systems where mobile terminals (MTs) maintain their history data in a database called user mobility history (UMH). During a location update, a UMP is derived from UMH and registered to the network. Unless the MT detects that it has moved out of the registered UMP, it does not perform any other location update. On the other hand, cells are paged selectively according to the cell entry times in the registered UMP upon a call arrival for the MT. The related data structures and the protocols for the UMP scheme are presented in the paper. The experimental results show that the UMP scheme outperforms the time-based and movement-based location update schemes as well as the blanket, selective, and velocity paging schemes.

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Location Management in Cellular Networks

Zhang

2002

Handbook of Wireless Networks and Mobile Computing

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It has been known for over one hundred years that radio can be used to keep in touch with people on the move. However, wireless communications using radio were not popular until Bell Laboratories developed the cellular concept to reuse the radio frequency in the 1960s and 1970s [31]. In the past decade, cellular communications have experienced an explosive growth due to recent technological advances in cellular networks and cellular telephone manufacturing. It is anticipated that they will experience even more growth in the next decade. In order to accommodate more subscribers, the size of cells must be reduced to make more efficient use of the limited frequency spectrum allocation. This will add to the challenge of some fundamental issues in cellular networks. Location management is one of the fundamental issues in cellular networks. It deals with how to track subscribers on the move. The purpose of this chapter is to survey recent research on location management in cellular networks. The rest of this chapter is organized as follows. Section 2.2 introduces cellular networks and Section 2.3 describes basic concepts of location management. Section 2.4 presents some assumptions that are commonly used to evaluate a location management scheme in terms of network topology, call arrival probability, and mobility. Section 2.5 surveys popular location management schemes. Finally, Section 2.6 summarizes the chapter. CELLULAR NETWORKSIn a cellular network, a service coverage area is divided into smaller hexagonal areas referred to as cells. Each cell is served by a base station. The base station is fixed. It is able to communicate with mobile stations such as cellular telephones using its radio transceiver. The base station is connected to the mobile switching center (MSC) which is, in turn, connected to the public switched telephone network (PSTN). Figure 2.1 illustrates a typical cellular network. The triangles represent base stations.The frequency spectrum allocated to wireless communications is very limited, so the 27 Handbook of Wireless Networks and Mobile Computing, Edited by Ivan Stojmenovic Ćopyright

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Tracking mobile users with uncertain parameters

Cited by 9 publications

References 13 publications

A speed-adaptive strategy for location management cost reduction in cellular networks

A speed-adaptive strategy for location management cost reduction in cellular networks

User mobility pattern scheme for location update and paging in wireless systems

Location Management in Cellular Networks

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