Performance of cac strategies for multimedia traffic in wireless networks

Deniz, D.Z.; Mohamed, N.O.

doi:10.1109/jsac.2003.815230

Cited by 26 publications

(7 citation statements)

References 13 publications

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“…Type 2 service indicates a "dual mode full-rate service". The adaptive coding of a type 2 service (s ¼ 2Ã) is a half-quality video telephone (64 kb/s) with voice connections requiring 96 kb/s [17,18]. Type 2* service indicates a "dual mode reduced-rate service".…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Admission control policy for adaptive multirate multiservices in cellular systems

Wang

Pan

2012

J Wireless Com Network

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Forced termination of connections during handover and blocked connection initiation are annoying from the perspective of multiservice cellular system users. Previous studies have shown that an admission control policy reduces the dropping probability to a much lower level but at the cost of raising the blocking probability to a higher level. As an alternative for reducing both blocking and dropping probabilities, we make use of the Adaptive Multirate (AMR) scheme, which is a well-known real-time streaming coding technique. For an example of AMR technique, a video source is encoded into multiple independent descriptions. A cellular device, depending on its available computing and network resources, joins different descriptions to meet performance requirements. The base layer is received and the enhancement layer(s) are abandoned if the cellular capacity is insufficient for high-quality video. Mobile cellular devices currently obtain basic video quality at a lower frame rate. AMR services can substantially improve the degree of user satisfaction and guarantee the connection-level quality of service (QoS) for different multimedia. In cellular systems, the QoS requirements of different services require a connection admission control (CAC) that limits the number of connections in each access network. Therefore, we focus on the CAC and connection-level QoS of multiservice traffic using adaptive coding in mobile cellular systems. We initially analyzed our CAC policy in a multiservices cellular system by formulating the CAC policy functions, arrival rate, departure rate, blocking probability, and dropping probability of the multiservices, before we derived the connection-level QoS and verified it by simulation. The adaptive coding of multiservices traffic has a significant impact on the connection-level QoS in multiservice cellular systems. Our method decreased the blocking and dropping probabilities by adapting multirate services while users were roaming. Mobile cellular operators providing AMR services could apply our CAC to fulfill the quality requirements of the user experience and also improve the connection-level QoS.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Admission control policy for adaptive multirate multiservices in cellular systems

Wang

Pan

2012

J Wireless Com Network

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“…Let M c denote the set of all cells in a wireless cellular network, A [16], and b w s BBUs to guarantee its QoS requirements in the cellular network and the WLAN, respectively. As an example, a BBU in the wireless cellular network can be 32 kbps, and a BBU in the WLAN can be 64 kbps.…”

Section: A Traffic and Mobility Modelsmentioning

confidence: 99%

Connection Admission Control for Multiservice Integrated Cellular/WLAN System

Stevens-Navarro

Mohsenian-Rad

Wong

2008

IEEE Trans. Veh. Technol.

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Abstract-The complementary characteristics of wireless cellular networks and wireless local area networks (WLANs) make them suitable to jointly offer seamless wireless access services to mobile users. In an integrated cellular/WLAN system, the quality of service (QoS) requirements for different services (e.g., voice, real-time video) require admission control to limit the number of connections in each access network. In this paper, we first develop an analytical model to facilitate the evaluation of different admission control policies in a multi-service integrated cellular/WLAN system. We then formulate two different revenue maximization problems. Each problem takes different QoS requirements into account. By solving the equivalent cost minimization problems, we evaluate the system performance when different combinations of cutoff priority and fractional guard channel admission control policies are being used. Results show that using cutoff priority policy in both wireless access networks can achieve the optimal solution for the two optimization problems under a wide range of network conditions.

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“…Appropriate call admission control and resource reservation schemes are developed to allocate resources adaptively to the real-time service classes with stringent delay bounds. CAC strategies for multimedia traffic in wireless networks is studied in [82]. Two CAC strategies; Reserve Channels Strategy and threshold strategy (TS) are applied to the wireless cell and their performances are compared.…”

Section: Admission Control: Distributed Versus Centralizedmentioning

confidence: 99%

Quality of service models for heterogeneous networks: overview and challenges

et al. 2008

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The proliferation and convergence of different types of wired, wireless and mobile networks (such as WiMAX, Wireless Mesh Networks, WPANs, WLANs, etc) and cellular-based networks are crucial for the success of nextgeneration networks. Traditional wired/wireless networks can hardly meet the requirements of future integrated-service networks which are expected to carry multimedia traffic with various quality of service (QoS) requirements. Therefore, it is necessary to develop efficient global control mechanisms that can maintain QoS requirements to maximize network resources utilization, and minimize operational costs on all the types of wireless mobile networks. In this paper, we present an overview of QoS paradigms for heterogeneous networks and focus on those based on deterministic and probabilistic QoS.

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Performance of cac strategies for multimedia traffic in wireless networks

Cited by 26 publications

References 13 publications

Admission control policy for adaptive multirate multiservices in cellular systems

Admission control policy for adaptive multirate multiservices in cellular systems

Connection Admission Control for Multiservice Integrated Cellular/WLAN System

Quality of service models for heterogeneous networks: overview and challenges

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