Experimental QoS performances of multimedia applications

Wang, P.Y.; Yemini, Yechiam; Florissi, D.; Zinky, J.; Florissi, Patrícia Gomes Soares

doi:10.1109/infcom.2000.832272

Cited by 23 publications

(10 citation statements)

References 16 publications

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“…To validate the performance of the QoS enhancement scheme, wireless-cum-wired network topologies with different sizes (8,16,24, and 32 unidirectional connections, i.e. small, medium, and large network) were simulated using the Network Simulator-2 (NS2) [17] (see Fig.…”

Section: A Network Modelmentioning

confidence: 99%

Improving Quality of Service in IEEE 802.11e Enhanced Distributed Channel Access protocol

Dogman

Saatchi

Al-Khayatt

2012

2012 8th International Symposium on Communication Systems, Networks &Amp; Digital Signal Processing (CSNDSP)

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A new quality of service (QoS) enhancement scheme for IEEE 802.11e Enhanced Distributed Channel Access (EDCA) protocol is developed. It uses a combination of an adaptive access category (AC) traffic allocation, incorporated into the network's wireless side, and weighted round robin (WRR) queuing scheduling mechanism, incorporated into the wired side of the network. The adaptive traffic allocation algorithm determines the packet arrival rate (PAR) of the up-and down-link traffic for each access category (AC). It then dynamically allocates traffic of a lower priority AC to the next higher AC, when the higher AC is not receiving traffic at the time. WRR shared the network resources, based on the traffic's Quality of Service requirements. The incorporation of the scheme caused an overall reduction of delay by 54.6%, jitter by 32%, and packet loss ratio by 62% for the transmitted applications.

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Section: A Network Modelmentioning

confidence: 99%

Improving Quality of Service in IEEE 802.11e Enhanced Distributed Channel Access protocol

Dogman

Saatchi

Al-Khayatt

2012

2012 8th International Symposium on Communication Systems, Networks &Amp; Digital Signal Processing (CSNDSP)

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“…entiation to TCP sessions, which the current DiffServ fails to achieve [28,45], there are three reasons for differentiating TCP control segments -SYNs, FINs, ACKs and RSTs -from data segments, especially in the best-effort service model.…”

Section: Introductionmentioning

confidence: 99%

Transport-aware IP routers: A built-in protection mechanism to counter DDoS attacks

Wang¹,

Shin²

2003

IEEE Trans. Parallel Distrib. Syst.

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The lack of service differentiation and resource isolation by the current IP routers exposes their vulnerability to Distributed Denial of Service (DDoS) attacks [12], causing a serious threat to the availability of Internet services. Based on the concept of layer-4 service differentiation and resource isolation, where the transport-layer information is inferred from the IP headers and used for packet classification and resource management, we present a transport-aware IP (tIP) router architecture that provides fine-grained service differentiation and resource isolation among different classes of traffic aggregates. The tIP router architecture consists of a fine-grained Quality-of-Service (QoS) classifier and an adaptive weight-based resource manager. A two-stage packet-classification mechanism is devised to decouple the fine-grained QoS lookup from the usual routing lookup at core routers. The fine-grained service differentiation and resource isolation provided inside the tIP router is a powerful built-in protection mechanism to counter DDoS attacks, reducing the vulnerability of Internet to DDoS attacks. Moreover, the tIP architecture is stateless and compatible with the Differentiated Service (DiffServ) infrastructure. Thanks to its scalable QoS support for TCP control segments, the tIP router supports bi-directional differentiated services for TCP sessions.

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“…In these networks, QoS-aware applications interact with QoS mechanisms to request the service quality they require [1,13,19]. However, since most legacy internet applications were developed before modern QoS mechanisms were developed, this functionality is missing in the majority of cases.…”

Section: Introductionmentioning

confidence: 99%

A transparent deployment method of RSVP-aware applications on UNIX

Shieh¹,

Miao²,

Wang³

2002

Computer Networks

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This paper proposes a method, called RLR (RSVP (Resource reSerVation Protocol) library redirection), which can transform legacy Internet applications into RSVP-aware applications without modifying their source files by redirecting procedure calls from the socket library to the RAPI library. This method can be fulfilled for UNIX operating systems, such as Linux and Free-BSD, etc., since these operating systems support the related mechanisms of procedure call interception. In addition to the advantage of transparent transformation, RLR also allows a single RLR software module to be used for multiple programs if they have similar protocol behavior.In this study, the RLR method has been used to render several legacy network applications RSVP aware. These applications include TCP-based and UDP-based programs, the two major Internet applications. The satisfactory use of a single RLR module for multiple applications is also verified. The results show that RLR is a feasible approach for deploying RSVP-aware applications.

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Experimental QoS performances of multimedia applications

Abstract: -Several

Cited by 23 publications

References 16 publications

Improving Quality of Service in IEEE 802.11e Enhanced Distributed Channel Access protocol

Improving Quality of Service in IEEE 802.11e Enhanced Distributed Channel Access protocol

Transport-aware IP routers: A built-in protection mechanism to counter DDoS attacks

A transparent deployment method of RSVP-aware applications on UNIX

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