Mobile user location update and paging under delay constraints

Ho, Johnny C.; Akyildiz, Ian F.

doi:10.1007/bf01985754

Cited by 242 publications

(115 citation statements)

References 8 publications

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“…Such research can be found in [23], [24]. However, reducing paging delay is also desired in 3G wireless networks.…”

Section: Previous Workmentioning

confidence: 99%

A crossing-tier location update/paging scheme in hierarchical cellular networks

Wu¹,

Mukherjee

Bhargava³

2006

IEEE Trans. Wireless Commun.

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Abstract-Location update/paging strategies have been widely studied in the traditional single-tier cellular networks. We propose and evaluate a novel crossing-tier location update/paging scheme that can be used in a hierarchical macrocell/microcell cellular network. Location update is proceeded only in the macrocell tier, where a location area (LA) is made up by larger macrocells. A mobile user will stay in such a LA for longer time. Therefore, the cost on location update can be reduced due to the decreased frequency of location update. To reduce the paging delay, the paged mobile user will be searched in the macrocell tier only when the paging load is not high. Otherwise, it will be searched in the microcell tier, where a sequential searching method is applied. The operation for the scheme is simple, as the macrocell/microcell cellular network has the advantage because a mobile user can receive a signal from both a microcell and the overlaid macrocell. Analytical models have been built for cost and delay evaluation. Numerical results show that, at relatively low cost, the crossing-tier scheme also achieves low paging delay.Index Terms-Mobility management, paging, location update, hierarchical cellular network, quality of service.

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“…Such research can be found in [23], [24]. However, reducing paging delay is also desired in 3G wireless networks.…”

Section: Previous Workmentioning

confidence: 99%

A crossing-tier location update/paging scheme in hierarchical cellular networks

Wu¹,

Mukherjee

Bhargava³

2006

IEEE Trans. Wireless Commun.

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“…= 5 and the mobility rates of subnets 1,7,8,9, and 10 are the five highest ones, FA6 sends paging messages to FA1, FA7, FA8, FA9, and FA10 in the second step. Each of the above FA checks whether the MN is in its subnet.…”

Section: Overview Of the User Independent Paging Schemementioning

confidence: 99%

“…Note that we do not impose geographic proximity of subnets as the constraint on our mobility model as used in the analysis of PCS paging schemes [2,3,8] and other Mobile IP paging schemes [26].…”

Section: Relationship Between Location Probabilities and Mobility Ratesmentioning

confidence: 99%

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User Independent Paging Scheme for Mobile IP

Xie

2005

Wireless Netw

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Abstract. Multi-step paging has been widely proposed in personal communications services (PCS) systems to reduce the signaling overheads. Similar ideas can be applied to Mobile IP to provide IP paging services. However, current proposed multi-step paging schemes are user dependent under which the partition of paging areas and the selection of paging sequence are different for each user. The performance of a user dependent paging scheme for individual users may be affected by many factors. It is often difficult to achieve perfect performance for each user. In addition, when multiple users are paged at the same time, user dependent paging schemes may consume significant system resources. This paper introduces a user independent paging scheme where the paging criterion is not based on individual user information. The goal of user independent paging is to provide satisfactory overall performance of the whole system, when personalized optimal performance for each user is hard to obtain. The user independent paging scheme is proposed for IP mobility for its easy implementation and convenient combination with paging request aggregation. The paging criterion adopted is the mobility rate of each subnet determined by the aggregated movements of all mobile users. In order to implement the proposed scheme, a concept of "semi-idle state" is introduced and the detailed solution for obtaining mobility rate is presented. Analytical results show that when paging one user at a time, the performance of the proposed user independent paging scheme is comparable to that of the paging schemes based on perfect knowledge of user movement statistics. When paging multiple users simultaneously and when the knowledge on individual user behavior is not perfectly accurate, the proposed scheme has remarkable advantages in terms of reducing the overall paging cost.

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“…The Discrete Time Random Walk model [2] is the most commonly used mobility model to describe individual movement behaviour. In this model the direction of a user is identically distributed between 0 and 2π.…”

Section: Mobility Modelsmentioning

confidence: 99%

On the accuracy of mobility modelling in wireless networks

Imre¹,

Szabó²

2004

2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)

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-In a wireless mobile network, two major problems arise: the poor performance of the wireless layer and the effect of user mobility. The problems related to limited available radio bandwidth and radio channel errors seem to be solved by CDMA technique applied in 3G mobile systems. The bandwidth that is provided by CDMA air interface is enough for mobile multimedia applications. However such applications are sensitive to the degradation of QoS parameters. Graceful degradation could happen when too many mobiles arrive to the same radio cell. To avoid such situations the Call Admission Control (CAC) has to limit the number of newly accepted connections. Terminal mobility causes problems in call admission control because the number of active mobile terminals in a cell is a random variable. In this paper we introduce a new method to predict the number of terminals in each cell. Based on this information a more effective CAC algorithm can be applied in order to ensure user's satisfaction.

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Mobile user location update and paging under delay constraints

Cited by 242 publications

References 8 publications

A crossing-tier location update/paging scheme in hierarchical cellular networks

A crossing-tier location update/paging scheme in hierarchical cellular networks

User Independent Paging Scheme for Mobile IP

On the accuracy of mobility modelling in wireless networks

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