A New Paradigm of CAC Dimensioning for VoIP Traffic over Wireless Access Networks

Kassev, Kiril; Mihov, Yakim Y.; Kalaydzhieva, Adriana; Tsankov, Boris

doi:10.1109/icds.2010.18

Cited by 14 publications

(19 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…terms of call blocking probability. In this research direction, authors in [2] and [18], considering a bufferless fluid-flow approach, proposed a VoIP packet loss model to determine the call admission threshold in wireless access transmission media to satisfy QoS constraints in terms of packet dropping and call blocking probabilities. However, the models proposed in [2] and [18] do not consider packet delay, which is one of the relevant QoS performance metric of VoIP traffic.…”

Section: Previously Published Related Workmentioning

confidence: 99%

“…Since system impairments across the VoIP connection are cumulative, the required QoS at the local domain is determined by the QoS achieved at the backbone domain. After extraction of possible QoS values achieved at the backbone domain, the remaining QoS budget for the local domain is, in general, quite limited [1]- [2]. The authors would like to acknowledge the support given by ICyTDF to present this work.…”

Section: Previously Published Related Workmentioning

confidence: 99%

“…All of the previously described works only consider packet delay as performance metric. As stated in [15], for VoIP admission control, only few studies consider call level performance in 1 End-to-end QoS provisioning can be divided into two parts [2]: QoS in the wireless access (local) domain and QoS in the backbone domain. In wireless VoIP networks, the local domain is represented by the wireless access network (i.e., WLAN, WMAN or eUTRAN) of end users and represents the last hop of a multi-hop VoIP connection.…”

Section: Previously Published Related Workmentioning

confidence: 99%

“…In wireless VoIP networks, the local domain is represented by the wireless access network (i.e., WLAN, WMAN or eUTRAN) of end users and represents the last hop of a multi-hop VoIP connection. The backbone domain is composed by the IP cloud that includes all the IP subnets that connect the end users trough their respective access networks [1]- [2]. Since system impairments across the VoIP connection are cumulative, the required QoS at the local domain is determined by the QoS achieved at the backbone domain.…”

Section: Previously Published Related Workmentioning

confidence: 99%

“…Recently, this technology has drawn much interest in wireless networks because of the convergence of all IP architecture in wireless and wireline networks [1]- [2]. Transport of voice over an IPbased network demands a different set of QoS metrics than those required for the transport of data.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Joint Call and Packet Level Performance Analysis of CAC Strategies for VoIP Traffic in Wireless

Castellanos-Lopez

Rivero-Ángeles

Hernandez-Valdez³

et al. 2011

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011

View full text Add to dashboard Cite

Call admission control (CAC) functionality is a critical requirement for guarantee the desired quality of service (QoS) for voice calls in IP-based wireless networks. In this paper, three different CAC strategies for voice over IP (VoIP) traffic over wireless access networks with packet buffering are mathematically analyzed through a joint call and packet level discrete time teletraffic model. The admission criterion (i.e., admission threshold) of new sessions of these strategies is based on either the total number of sessions, the number of active sessions (i.e., sessions in talk-spurt periods), or the number of packets queued in the buffer. Admission threshold and buffer size can be both controlled for QoS provisioning in terms of session blocking and packet dropping probabilities. Arrivals and completions of VoIP sessions, on/off activity detection, and periodic and constant length packet generation (of active sessions) of individual VoIP sessions are modeled. The developed teletraffic analysis allows to evaluate the performance of the CAC strategies in terms of the most relevant QoS metrics of VoIP traffic at both call and packet level (i.e., session blocking and packet dropping probabilities and packet delay). Finally, the maximum traffic attained by the different studied-CAC strategies (while QoS provisioning is guaranteed) is obtained.Keywords-Call admission control; VoIP; joint call and packet level analysis; QoS provisioning; voice activity detection; session blocking; packet dropping probability; packet delay.

show abstract