Stochastic control of handoffs in cellular networks

Rezaiifar, R.; Makowski, Armand M.; Kumar, Sandeep

doi:10.1109/49.414652

Cited by 17 publications

(16 citation statements)

References 9 publications

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“…Next, we introduce the operator by setting (22) for every . Now, using the important properties given in [10], [17], and [18], we state the following important results.…”

Section: Theoremmentioning

confidence: 99%

“…Now we will use the results of the theorems given in [10], [17], and [18] to investigate the structure of the optimal policy. In fact, it turns out that the optimal rate control policy belongs to the class of threshold policies.…”

Section: Proposition 1: Under the Model Assumptions [Stationary Markomentioning

confidence: 99%

“…Another good example is [9], which deals with optimal control of service in tandem queues. In [10], the authors consider the problem of stochastic control of handoffs in cellular networks and try to find an optimal policy for the handoff problem.…”

Section: Introductionmentioning

confidence: 99%

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Jointly optimized bit-rate/delay control policy for wireless packet networks with fading channels

Razavilar¹,

Liu

Marcus

2002

IEEE Trans. Commun.

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Abstract-In this paper, we consider the downlink rate control problem in a wireless channel. A dynamic programming optimization method is introduced to obtain the optimal bit-rate/delay control policy in the downlink for packet transmission in wireless networks with fading channels. We assume that the base station is capable of transmitting data packets in the downlink with different bit rates, 0 1 1 . It is assumed that the symbol rate is fixed in the system, and different bit rates are achieved by choosing the transmitted symbols from the appropriate signal constellation (adaptive modulation). The derived optimal rate control policy, in each time slot, selects the highest possible bit rate which minimizes the delay and at the same time minimizes the number of rate switchings in the network. The optimal bit-rate control problem is an important issue, especially in packet data networks, where we need to guarantee a quality of service (QoS) in the network. Our analytical as well as simulation results confirm that there is an optimal threshold policy to switch between different rates.Index Terms-Adaptive modulation, dynamic programming, optimal bit-rate control, wireless packet networks.

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“…Next, we introduce the operator by setting (22) for every . Now, using the important properties given in [10], [17], and [18], we state the following important results.…”

Section: Theoremmentioning

confidence: 99%

Section: Proposition 1: Under the Model Assumptions [Stationary Markomentioning

confidence: 99%

See 1 more Smart Citation

Jointly optimized bit-rate/delay control policy for wireless packet networks with fading channels

Razavilar¹,

Liu

Marcus

2002

IEEE Trans. Commun.

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“…While a handover control problem can be studied conventionally in a simplified model of two cells-see, e.g., [8] and [9]-in which a handover decision is made by assigning the mobile to one of them, the handover measurement problem involves a much more complex system in which the signal quality of the best cell among a large number of cells needs to be determined with respect to the experienced interference and noise. This often incurs modeling and analysis difficulty, especially when stochastic parameters are introduced to better describe wireless channels and network dynamics.…”

Section: Introductionmentioning

confidence: 99%

A Unified Stochastic Model of Handover Measurement in Mobile Networks

Nguyễn¹,

Chen²,

Thomas³

2014

IEEE/ACM Trans. Networking

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Handover measurement is responsible for finding a handover target and directly decides the performance of mobility management. It is governed by a complex combination of parameters dealing with multi-cell scenarios and system dynamics. A network design has to offer an appropriate handover measurement procedure in such a multi-constraint problem. The present paper proposes a unified framework for the network analysis and optimization. The exposition focuses on the stochastic modeling and addresses its key probabilistic events namely (i) suitable handover target found, (ii) service failure, (iii) handover measurement triggering, and (iv) handover measurement withdrawal. We derive their closed-form expressions and provide a generalized setup for the analysis of handover measurement failure and target cell quality by the best signal quality and \st{minimum duration outage} \textit{level crossing properties}. Finally, we show its application and effectiveness in today's 3GPP-LTE cellular networks.Comment: Published in IEEE/ACM Transaction on Networking, vol.22, no.5, pp.1559,1576, Oct. 201

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“…Combining power control with base-station assignment has been formulated as an optimization problem for singleservice (voice) systems [4], [5], [6], [7]. The tradeoff between handoff-switching cost and connection quality has been investigated separately from power-control optimization [8], [9]. For multimedia communications, variable spreading gain and power control have been proposed to handle mixed traffic with different rates and QoS requirements [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Optimal resource management in wireless multimedia wideband CDMA systems

Soleimanipour

Zhuang

Freeman

2002

IEEE Trans. on Mobile Comput.

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This paper proposes a scheme of optimal resource management for reverse-link transmissions in multimedia wideband code-division multiple-access (WCDMA) communications. It is to guarantee quality-of-service (QoS) by resource (transmit power and rate) allocation and to achieve high spectral efficiency by base-station assignment. This approach takes the form of a nonlinearprogramming large-scale optimization problem: maximizing an abstraction for the profit of a service provider subject to QoS satisfaction. Solutions for both single-cell and multicell systems are investigated. The single-cell solution has the advantage of low complexity and global convergence in comparison with the previous work. Maximum achievable throughput (capacity) of a single cell is mathematically evaluated and used as the benchmark for performance measure of multicell systems. For multicell systems, due to its max-max structure, solving the optimization problem directly entails a high-computational complexity. Instead, the problem is reformulated to a mixed integer nonlinear-programming (MINLP) problem. Then, binary variables indicating base-station assignments are relaxed to their continuous analogs to make a computer solution feasible. Furthermore, approximations can be made to make the resource-management scheme less computationally complex and allow its partial decentralization. The sensitivity of the proposed scheme to path-gain estimation error is studied. Simulation results are presented to demonstrate the performance of the proposed scheme and the throughput improvement achieved by combining resource allocation with base station assignment.Index Terms-Wideband code-division multiple access (WCDMA), resource management, quality of service (QoS), base station assignment, multimedia services.

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Stochastic control of handoffs in cellular networks

Cited by 17 publications

References 9 publications

Jointly optimized bit-rate/delay control policy for wireless packet networks with fading channels

Jointly optimized bit-rate/delay control policy for wireless packet networks with fading channels

A Unified Stochastic Model of Handover Measurement in Mobile Networks

Optimal resource management in wireless multimedia wideband CDMA systems

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