The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
As the Session Initiation Protocol (SIP) becomes more and more the core of the communication networks convergence, there is urgent need to manage the critical problem of SIP service availability under extreme overload. This paper proposes a novel solution to control SIP overload. We demonstrate the efficiency of the approach compared with a well known SIP overload control algorithm. The solution builds...
Retransmission mechanism helps SIP maintain its reliability, but it can also make an overload worse. Recent server collapses due to emergency-induced call volume in carrier networks indicate that the built-in overload control mechanism cannot handle overload conditions effectively. Since the retransmissions caused by the overload are redundant, we suggest mitigating the overload by controlling redundant...
The rapid advancement of mobile communication technologies recently has led to the advent of mobile IPTV service. For a variety of multimedia services, a process of session setup using SIP (session initiation protocol) is required. However, high frame error rate (FER) of typical wireless network causes failure and delay in session setup. In this paper we propose a new scheme minimizing the session...
Data center switches need to satisfy stringent low-delay and high-capacity requirements. To do so, they rely on small switch buffers. However, in case of congestion, data center switches can incur throughput collapse for short TCP flows as well as temporary starvation for long TCP flows. In this paper, we introduce a lightweight hash-based algorithm called HCF (Hashed Credits Fair) to solve these...
The Session Initiation Protocol (SIP) has gained momentum and is being widely used both in the Internet and Next Generation Telecommunications network as the core signaling protocol. SIP operation relies on SIP servers which are responsible for forwarding of SIP messages. It has been shown that the performance of SIP servers is largely degraded during overload conditions due to the built in message...
Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be...
Session Initiation Protocol (SIP) servers can experience prolonged overload due to high rates of incoming service requests or partial network failures. SIP servers need to be equipped with some form of adaptive overload detection and control, in order to protect against high and unpredictable levels of demand and to keep response times low enough during processing overload to preclude customers abandoning...
Applications like streaming audio, Internet telephony and multi-player online games prefer timeliness in packet delivery to reliability. TCP's reliability through packet retransmission and abrupt rate control features are unsuitable for these applications. As a result, these applications prefer UDP as the transport layer protocol. UDP does not have any congestion control mechanism which is vital for...
Most of existing transfer protocols performs poorly for transferring bulk data over fast long distance network. A key reason is the congestion control algorithm. This paper designs a novel congestion control algorithm, namely congestion detection and rate adaptation (CDRA) algorithm, which adjusts sending rate according to the congestion level of terminal in order to maximize transfer performance...
Most current web application use HTTP (Hyper Text Transfer Protocol) and TCP (Transmission Control Protocol) to retrieve objects from the Internet. SCTP (Stream Control Transmission Protocol) is recently proposed transport protocol with congestion control mechanism similar to that of TCP. Waiting delay is an important performance criterion for when transferring web object over the Internet. In this...
The increasing use of SIP in next generation networks necessitates that SIP networks provide adequate control mechanisms to optimize transaction throughput and prevent congestion collapse during traffic overloads. SIP elements need well behaved internal overload controls to detect and throttle traffic, and external controls between SIP elements are needed to throttle traffic closer to the source....
Computer network is an important phenomenon for digital information world. Computer network having the various problem due to more demand such as congestion control security, reliability, scalability, fairness etc. Multicast service helps computer network to flow information from one end to another end. In this paper, we provide BDQP approach to minimize the congestion control. NS-2 result shows,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.