Performance Modeling of Cellular Mobile Systems: A Review of Recent Advances

Bhattacharya, Samya; Gupta, H. M.; Kar, Subrat

doi:10.4103/0256-4602.58970

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…A flexible resource allocation scheme may reduce the blocking probability. Hybrid(Flexible) channel allocation [1] is combination of fixed and dynamic allocation. Some channels are statically allocated so as to support the local calls and these can be reserved to support hand off calls.…”

Section: Problem Formulationmentioning

confidence: 99%

A new framework for call admission control in wireless cellular network

Kamble¹,

Gupta²

2011

2011 International Conference on Emerging Trends in Networks and Computer Communications (ETNCC)

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Managing the limited amount of the radio spectrum is an important issue with increasing demand of the same. In recent work, we have introduced MAS (Multi-agent System) for channel assignment problem in wireless cellular networks. Iinstead of using a base station directly for negotiation, a multiagent system comprising of software agents was designed to work at base station. The system consists of a collection of layers to take care of local and global scenario. In this paper we propose the combination of MAS with a new call admission control (CAC) mechanism based on fuzzy control. This paper aims to provide improvement in QoS parameters using fuzzy control at call admission level. From the simulation studies it is observed that combined approach of Multi-agent system and fuzzy control at initial level improves channel allocation and other QoS factors in an effective and efficient manner. The simulation results are presented on a benchmark 49 cell environment with 70 channels that validate the performance of this approach.

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Section: Problem Formulationmentioning

confidence: 99%

A new framework for call admission control in wireless cellular network

Kamble¹,

Gupta²

2011

2011 International Conference on Emerging Trends in Networks and Computer Communications (ETNCC)

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“…In all of the above approaches, the DCA is centrally implemented in the mobile switching center (MSC) or in a cell with a central controller, which collects information about all of the cells in the CMS. The shortcomings of such centralized schemes are as follows; (i) the MSC is increasingly likely to fail owing to an overload of call requests as the size of the CMS grows with the growth in the number of mobile users [15,16], and (ii) determining the best available channel is time consuming even when heuristic methods are used, and a new call may be blocked as a result of just one unsuccessful assignment. These drawbacks suggest that distributed DCA schemes may be better for large CMS, because they assign and reassign channels at the base station of a cell [17,18].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy call admission control combined with distributed dynamic channel assignment and reassignment for cellular mobile systems

Horng

Lin

2015

J Wireless Com Network

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In a cellular mobile system (CMS), the service area is divided into cells, each of which has numerous channels, which are shared by two types of call -new calls and handoff calls. Giving a higher priority to handoff calls than new calls is common practice. However, giving too much priority to handoff calls will result to excessive blocking of new calls. This work firstly proposes a distributed dynamic channel assignment and reassignment (DDCAR) scheme to satisfy three types of constraint -co-channel constraint (CCC), adjacent channel constraint (ACC), and co-site constraint (CSC), simultaneously. The purpose is to minimize the number of available channels that become unavailable for the assignment to new calls and to maximize the number of unavailable channels that become available for release when calls complete. To provide a higher priority to handoff calls, a fuzzy call admission control (FCAC) scheme, combined with the DDCAR, is proposed herein for implementation at the base station. A 7 × 7 CMS with two traffic patterns is employed as the test example. The test results reveal that the FCAC scheme significantly reduces the dropping probability of handoff calls at the cost of increasing the blocking probability of new calls to an acceptable level.

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“…The needs for QoS support arises when there are many data streams (service flows or users) that compete for limited capacity on the transmission media or in a network [5]. In WiMAX, the limitation resource is in the radio frequency bandwidth.…”

Section: Introductionmentioning

confidence: 99%

In-depth understanding, analysis, and classification of wimax scheduling state-of-the-art for effective practical scheduler design and development

Bayan¹,

Wan²

2012

IETE Tech Rev

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Packet scheduler is an important component of WiMAX MAC layer that helps to provide Quality of Service (QoS) guarantee to various service classes of WiMAX systems. Providing an in-depth understanding, analysis, and classifications of WiMAX scheduling schemes is of utmost importance toward designing effective practical schedulers. This article provides a comprehensive survey of various WiMAX scheduling schemes for both point-to-multipoint and multi-hop relay systems. We first discuss on an existing QoS architecture of conventional WiMAX systems, then we make a comprehensive classification and in-depth analysis of the current state-of-theart of single-and multi-hop relay systems which further classifies the scheduling schemes based on the use of channel state condition, queue state, and type of scheduling scheme. We also highlight detailed descriptions of various design aspects, objectives, methodologies, and limitations of the previously proposed researches. After extensively reviewing literatures on scheduling mechanisms, we found out that there still remain many issues and consideration in the previously scheduler designs. Hence, we discussed on the main important aspects related to schedulers design to assist researchers, network designers, and Internet Service Providers in designing effective practical schedulers for single-hop or multi-hop relay systems. Finally, the article concludes on the research gaps found in the previously discussed researches and outlines open research issues for future work.

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Performance Modeling of Cellular Mobile Systems: A Review of Recent Advances

Cited by 4 publications

References 32 publications

A new framework for call admission control in wireless cellular network

A new framework for call admission control in wireless cellular network

Fuzzy call admission control combined with distributed dynamic channel assignment and reassignment for cellular mobile systems

In-depth understanding, analysis, and classification of wimax scheduling state-of-the-art for effective practical scheduler design and development

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