A combined channel assignment mechanism for hierarchical cellular systems

Lo, Kuen-Rong; Chang, Chung‐Ju; Chang, Cooper; Shung, C.B.

doi:10.1016/s0140-3664(98)00177-7

Cited by 9 publications

(10 citation statements)

References 11 publications

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“…[4][5][6][7][8][9][10], some random processes and the corresponding notation used in the following sections are defined and listed below:…”

Section: Basic Notation and Assumptionsmentioning

confidence: 99%

“…Then Psm can be defined as Psm = Prob{tu > tam} = ~dm/(#dm "4-#) (7) Similarly, P/m, PsM and P/M can be defined as follows: Plm = Prob{t~, > tdm}= #dm/(#drn -Jr-#) (8) PsM = Prob{tu > triM} = #dM/(#dM + #) (9) PIM = Pr°b{tu > tdM}= ~dM/(~dM "~" #) (10) It is assumed that HCS is a system with homogeneous traffic load in statistical equilibrium state, therefore Ash includes the following four parts:…”

Section: Calculation Of Ash Alhmentioning

confidence: 99%

“…[8][9][10], which allow the fast calls and slow calls share the common channel resources in both the microcells and macrocells. In these papers, the theoretical analysis or simulation evaluation show that this scheme outperforms others (no call-overflow and unidirectional call-overflow scheme) in terms of the average new call blocking and handoff failure probability of the system.…”

Section: Introductionmentioning

confidence: 99%

“…But in Refs. [8,9], only simulations are carried out to discuss the system performance. Besides, in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic guard channel assignment for bidirectional call-overflow scheme in Hierarchical Cellular System

Shan

Fan

2003

J. of Electron.(China)

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In this paper, a Hierarchical Cellular System (HCS) supporting two classes of users with high and low velocity is considered. Based on the analytical model of the bidirectional calloverflow scheme, a new dynamic guard channel assignment method is proposed. In this method, the number of guard channels in both macrocells and microcells varies in realtime according to the different call traffic load in the HCS, and as a result, the lowest dissatisfaction grade of users is achieved.

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“…[4][5][6][7][8][9][10], some random processes and the corresponding notation used in the following sections are defined and listed below:…”

Section: Basic Notation and Assumptionsmentioning

confidence: 99%

Section: Calculation Of Ash Alhmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…But in Refs. [8,9], only simulations are carried out to discuss the system performance. Besides, in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic guard channel assignment for bidirectional call-overflow scheme in Hierarchical Cellular System

Shan

Fan

2003

J. of Electron.(China)

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“…Although, Lo et al [17] propose a similar scheme named combined channel assignment (CCA), its performance analysis is mainly based on simulation, with or without guard channels. Furthermore, they do not consider the number of hand offs and the mobile velocity which have effects on the system GoS.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a hierarchical cellular system with mobile velocity-based bidirectional call-overflow scheme

Shan

Fan

Pan³

2003

IEEE Trans. Parallel Distrib. Syst.

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With the increase of teletraffic demands in mobile cellular system, hierarchical cellular systems (HCSs) have been adopted extensively for more efficient channel utilization and better GoS (Grade of Services). A practical issue related to HCS is to design a scheme for controlling and allocating call traffic to different layers. There are several strategies to deal with this problem, such as no call-overflow scheme, unidirectional call-overflow scheme and bidirectional call-overflow scheme. The objective of this paper is to investigate a bidirectional call-overflow scheme, based on the velocity of the mobile making the calls. To ensure that hand off calls are given higher priorities, it is assumed that guard channels are assigned in both macrocells and microcells. In order to evaluate the performance of the new scheme and compare the performance of several related schemes, two new models based on a onedimensional Markov process are developed and analytical results are derived. Theoretical analysis and numerical evaluation show that the proposed scheme outperforms others in terms of average new call blocking and hand off failure probability of the system. In addition, when the teletraffic to the HCS reaches a certain grade, the GoS is insensitive to the maximum velocity and the velocity threshold which is used to assign calls to different layers in our scheme.

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Computational Intelligence in Multimedia Networking and Communications: Trends and Future Directions

Guturu

2008

Studies in Computational Intelligence

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A combined channel assignment mechanism for hierarchical cellular systems

Cited by 9 publications

References 11 publications

Dynamic guard channel assignment for bidirectional call-overflow scheme in Hierarchical Cellular System

Dynamic guard channel assignment for bidirectional call-overflow scheme in Hierarchical Cellular System

Performance evaluation of a hierarchical cellular system with mobile velocity-based bidirectional call-overflow scheme

Computational Intelligence in Multimedia Networking and Communications: Trends and Future Directions

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