Performance evaluation of priority-based call admission control in multi-service DS-CDMA cellular networks supporting VBR video traffic

Randhawa, T.S.; Hardy, R.H.S.

doi:10.1109/icc.2002.997408

Cited by 6 publications

(7 citation statements)

References 18 publications

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“…The results here are comparable to those from existing schemes [1,[4][5][6][7]. As the amount of traffic requesting access to the network increases, our CAC scheme maintains a control on the dropping probabilities at the expense of the new call blocking probabilities.…”

Section: Resultssupporting

confidence: 90%

“…The maximum number of channels that can be ON simultaneously whilst satisfying the BER limit, BER i is [7] …”

Section: Proposed Call Admission Control Algorithmmentioning

confidence: 99%

“…This assumption is not suitable for services with traffic that generates an ON, OFF pattern [7], as it wastes valuable bandwidth during the OFF periods. For example, with a voice call, data is only transmitted when the user is talking.…”

Section: Introductionmentioning

confidence: 99%

“…The BER experienced when c channels transmitting at a rate of B are active, can be expressed as [7] BERðcÞ…”

Section: Introductionmentioning

confidence: 99%

“…Streaming video can be transmitted on the uplink at peak rates of either 16 or 57.6 kbps and the inter-frame bit-rate process is modelled using a Gaussian distribution as detailed in References [7,9].…”

Section: Introductionmentioning

confidence: 99%

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Service based CAC with QoS guarantee in mobile wireless cellular networks

Fry

Jamalipour

2005

Int. J. Commun. Syst.

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SUMMARYThe increasing variety and complexity of traffic in today's mobile wireless networks means that there are more restrictions placed on a network in order to guarantee the individual requirements of the different traffic types and users. Call admission control (CAC) plays a vital role in achieving this. In this paper, we propose a CAC scheme for multiple service systems where the predicted call usage of each service is used to make the admission decision. Our scheme enables real-time traffic to be transmitted using shared bandwidth without quality of service (QoS) requirements being exceeded. This ensures that the utilization of the available wireless bandwidth is maximized. Information about the channel usage of each service is used to estimate the capacity of the cell in terms of the number of users that can achieve a certain bit error rate (BER). Priorities assigned to each service are used to allocate the network capacity. An expression for the handoff dropping probability is derived, and the maximum acceptance rate for each service that results in the estimated dropping probability not exceeding its QoS requirements is calculated. Each call is then accepted with equal probability throughout the duration of a control period. Achieved QoS during the previous control period is used to update the new call acceptance rates thus ensuring the dropping probability remains below the specified threshold.Simulations conducted in a wideband CDMA environment with conversational, streaming, interactive and background sources show that the proposed CAC can successfully meet the hard restraint on the dropping probability and guarantee the required BER for multiple services.

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Section: Resultssupporting

confidence: 90%

“…The maximum number of channels that can be ON simultaneously whilst satisfying the BER limit, BER i is [7] …”

Section: Proposed Call Admission Control Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The BER experienced when c channels transmitting at a rate of B are active, can be expressed as [7] BERðcÞ…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Service based CAC with QoS guarantee in mobile wireless cellular networks

Fry

Jamalipour

2005

Int. J. Commun. Syst.

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A precision predictive call admission control in packet switched multi-service wireless cellular networks

Fry

Jamalipour

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)

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A priority based admission control strategy for WCDMA systems

Fantacci

Mennuti

Tarchi

IEEE International Conference on Communications, 2005. ICC 2005. 2005

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Future wireless systems need higher support in terms of QoS support. In particular when several connections with different QoS attributes are allowed a prioritization system has to be foreseen. In the UMTS and other systems that exploit the WCDMA approach the problem of mitigating the Multiple Access Interference arises, too. The Admission Control algorithms have been introduced in the literature in order to prevent any congestion status in the network. In this paper an Admission Control algorithm that works by exploiting the current interference level is presented; moreover each type of traffic is managed in order to respect its QoS in terms of priority.

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Performance evaluation of priority-based call admission control in multi-service DS-CDMA cellular networks supporting VBR video traffic

Cited by 6 publications

References 18 publications

Service based CAC with QoS guarantee in mobile wireless cellular networks

Service based CAC with QoS guarantee in mobile wireless cellular networks

A precision predictive call admission control in packet switched multi-service wireless cellular networks

A priority based admission control strategy for WCDMA systems

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