In this paper, we consider a retrial queue with state-dependent service rate as mathematical model of node FANET communications. We suppose that the arrival process is Poisson, delay duration exponentially distributed, orbit unlimited, and there multiple random access from orbit. There one server, time every call distributed variable parameter depending on number calls in The has an infinite va...

Erasure coding has been recognized as a powerful method to mitigate delays due slow or straggling nodes in distributed systems. This work shows that erasure of data objects can flexibly handle skews the request rates. Coding help boost service rate region , is, increase overall volume access re...

The Guaranteed Frame Rate(GFR)service is positioned as an intermediate alternative between Available Bit Rate(ABR)service, which uses a closed-loop feedback control framework, and Unspecified Bit Rate(UBR) service, which provides no assurance whatsoever. The GFR service is expected to be useful for TCP/IP based applications. The aim of the GFR service is to provide each ATM VC with a minimum se...

The ATM Forum and ITU-T specify multiple service categories of B-ISDN, such as CBR (constant bit rate), RT-VBR (realtime variable bit rate), NRT-VBR-COD/CLD (non-realtime variable bit rate connection-oriented data/connectionless data), ABR (available bit rate), and UBR (unspecified bit rate). Each service category specifies different traffic parameters and QoS parameters : bandwidth, end-to-end...

Suppose that in a stationary M/M/c queueing system with arrival rate and service rate , customers may be lost via either balking with probability $ or reneging at rate. All of , and the loss parameter $ or as applicable are unknown and are to be estimated from transactional data (i.e. the set of service initiation and service completion epochs) observed on a (long) time interval of length T. Th...

We propose a multirate service mechanism that allows a network session to be served at diierent rates at diierent times. Applications generating bursty data, such as VBR video, can take advantage of mul-tirate service by requesting a high rate of service for brief periods of bursty arrivals and a lower rate of service at other times. Consequently, an application can improve its delay performanc...