Teletraffic modeling and analysis of flexible hierarchical cellular networks with speed-sensitive handoff strategy

Jabbari, Bijan; Fuhrmann, Woldemar

doi:10.1109/49.634792

Cited by 136 publications

(96 citation statements)

References 10 publications

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“…Here, θ is a uniform random variable in the interval [0, 2π] and v equals 5Km/h [13]. Also, s is a uniform random variable in the interval [0, 1].…”

Section: Resultsmentioning

confidence: 99%

A More Realistic Approach to Information-Theoretic Sum Capacity of Reverse Link CDMA Systems in a Single Cell

Abadpour

Alfa

Soong

2007

2007 IEEE International Conference on Communications

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Abstract-In this paper, we discuss the information-theoretic approach to finding the pattern of transmission powers of the stations in a CDMA system which maximizes the aggregate capacity of the reverse link. This optimization problem is solved subject to a set of constraints. Previous research has suggested a minimum guaranteed quality of service plus bounds on individual transmission powers and the aggregate transmitted power as the constraints. Solving this problem, it is found out that the solution is very prone to including one station which transmits at a rate a hundred times as much as the others. Thus, it is concluded that the above constraints are not enough to produce a solution which can be realized in an actual system. It is suggested that lack of any constraint which explicitly controls either the maximum capacity of each station or the unfairness of the whole system is responsible for this shortcoming. In this paper, we include a maximum capacity constraint into the formulation and propose an algorithm for solving the resulting optimization problem. Then, empirical evidence are analyzed to show that the system actually becomes more balanced and practical after the new constraint is added to it.

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“…Here, θ is a uniform random variable in the interval [0, 2π] and v equals 5Km/h [13]. Also, s is a uniform random variable in the interval [0, 1].…”

Section: Resultsmentioning

confidence: 99%

A More Realistic Approach to Information-Theoretic Sum Capacity of Reverse Link CDMA Systems in a Single Cell

Abadpour

Alfa

Soong

2007

2007 IEEE International Conference on Communications

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“…1 The link gain between an MS located at and BS is (1) where is the distance between the MS and BS , is the path loss exponent, and 10 is the shadowing component with log-normal distribution (2) 1 One can incorporate Rayleigh/Nakagami fading into our analysis by using a log-normal approximation for the composite log-normal Rayleigh/Nakagami distribution [11].…”

Section: System Model and Analysismentioning

confidence: 99%

“…2 The upper threshold is the pilot signal level where qualifying BSs are added to the active set, whereas the lower threshold determines when the BSs are removed from the active set. The difference between and is an indicator of how long a soft handoff will take on average.…”

Section: B Soft Handoff Analysismentioning

confidence: 99%

“…As mentioned above, soft handoff has great impact on CDMA cellular system performance/capacity, and studying its performance in hierarchical architectures can provide crucial information on how the system performance can be optimized. Velocity-based handoff schemes, where fast moving MSs are assigned to microcells while slow moving MSs are assigned to microcells, have been proposed [1], [2]. Such schemes can reduce the number of handoffs.…”

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confidence: 99%

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Soft handoff analysis for hierarchical CDMA cellular systems

Kim

Stuber²,

Chung³

IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202)

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Abstract-A new soft handoff analysis for hierarchical code-division multiple-access (CDMA) cellular systems is presented. Hierarchical cellular architectures have been proposed to increase cellular system capacity and flexibility. In order to extend such architectures to CDMA-based systems, the performance of soft handoff in hierarchical architectures must be considered. We first develop an analytical method for studying the interference in hierarchical CDMA cellular systems. We then apply the obtained results to a soft handoff analysis model to study the performance of soft handoff in hierarchical architectures. It is observed that dynamic handoff parameter assignment, where parameters are dynamically adjusted according to given interference conditions, offers a more efficient handoff mechanism than fixed handoff parameter assignment.Index Terms-Active set, carrier-to-interference ratio (CIR), code-division multiple access (CDMA), hierarchical architectures, macrocell, microcell, soft handoff.

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“…A fluid flow mobility model is adopted [14]. In this model, the mobile terminals are uniformly distributed over a given cell.…”

Section: Performance Evaluationmentioning

confidence: 99%

Network Selection For One-to-Many Services In 3G-Broadcasting Cooperative Networks

Huang

Chew

Tafazolli

2005 IEEE 61st Vehicular Technology Conference

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Abstract-The beyond 3G or 4G mobile systems envisions heterogeneous infrastructures comprising diverse wireless systems, e.g., 2G, 3G, DVB, WLAN, and various transmission approaches, e.g., "one-to-one" and "one-to-many". In this context, a network selection (NS) problem emerges regarding determining the appropriate Access Network (AN), as users are reachable through several different ANs. This paper addresses the issue of provisioning "one-to-many" services over heterogeneous wireless networks in terms of how to choose the AN that satisfies the bandwidth requirement of services, while maximizing the system profit obtained in the combined network. A heterogeneous network comprising Multicast Broadcast Multimedia Service (MBMS) of the third generation mobile terrestrial network and the digital video broadcasting transmission system for handheld terminals (DVB-H) is adopted in this study. Both networks cooperate and complement each other to improve the resource usage and to support "one-to-many" services with their multicast and broadcast transmission capabilities. Based on this architecture, an algorithm framework is defined and proposed to solve the NS problem for the "one-to-many" services. Six schemes based on the algorithm framework are then evaluated by simulation.

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Teletraffic modeling and analysis of flexible hierarchical cellular networks with speed-sensitive handoff strategy

Cited by 136 publications

References 10 publications

A More Realistic Approach to Information-Theoretic Sum Capacity of Reverse Link CDMA Systems in a Single Cell

A More Realistic Approach to Information-Theoretic Sum Capacity of Reverse Link CDMA Systems in a Single Cell

Soft handoff analysis for hierarchical CDMA cellular systems

Network Selection For One-to-Many Services In 3G-Broadcasting Cooperative Networks

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