Quality of service is a key problem in wireless environments where bandwidth is scarce and channel conditions are time varying and sometimes implies highly packet losses. IEEE 802.11b/g/a wireless LAN are the most widely used WLAN standards today, and the IEEE 802.11e quality of service enhancement standard exists and introduces quality of service support for multimedia applications. This paper...

We present a new input-queued switch architecture designed to support deadline-ordered scheduling at extremely high-speeds. In particular, deadline-ordered scheduling is enabled through a combination of hardware-based sorted priority queues called P-heaps and a round-robin crossbar scheduler. The priority queues are implemented using a novel scalable pipelined heap-based architecture. Using a 0...

priority queues have a great importance in the study of computer communication networks in which different types of traffic require different quality of service standards. the discrete-time non-preemptive priority queuing model with priority jumps is proposed in this paper. on the basis of probability generating functions mean system contents and mean queuing delay characteristics are obtained....

Improving the product reliability is the main concern in both manufacturing and service processes which is obtained by monitoring the reliability-related quality characteristics. Nowadays, products or services are the result of processes with dependent stages referred to as multistage processes. In these processes, the quality characteristic in each stage is affected by the quality characterist...

purpose: the gole of this study is to survey attitudes of council members' of rural relative to the preference quality of life in rural areas of villages of dehgolan in kurditan province. it reveals the priority of indices in terms of the quality of life improvement in this region. methodology: this study was descriptive - analytical. data was collected through a questionnaire survey. the study...

Considering traditional MAC protocols for Wireless Sensor Networks cannot provide service differentiation for different traffic classes, we propose a Self-adaption QoS-aware MAC protocol (SQ-MAC). The protocol can provide collision-free time slots for nodes, and take different contention window size for different traffic classes. It can also introduce virtual multiqueue and relatively fair sche...

Since their inception Computer Security Incident Response Teams (CSIRTs) have been afflicted by chronic problems concerning workload, quality of service, and sustaining their constituency. We have cooperated with one of the oldest CSIRTs to model the most challenging issues. Low-priority and high-priority incident response cause distinct problems. In a previous paper we dealt with the impact of...

The media, especially the video delivery over mobile channels may be affected by link outages and transmission bit rate variations due to the actual channel condition and the used wireless interface. In this paper we present the use of Priority-based Transmission Scheduling of SVC media data to overcome link outages and reduction in channel bit rate in mobile networks. The Priority-based Transm...