Each protocol has a different strategy and methodology for handling data transmission over unreliable channels.The basic algorithm modules used in ARQ protocols are: ACKnowledgments (ACK is a small frame that the receiver sends to the sender to notify successful delivery of a data frame), Negative AcKnowledgment (NAK is a small frame that the receiver sends to the sender to indicate unsuccessful transmission. Go-Back-N ARQ (GBN ARQ), Selective Repeat ARQ (SR ARQ) and Stop and Wait ARQ (SW ARQ) are different types of ARQ protocol. So, there is more concentration on noisy channel protocols, which emphasis flow control and error control mechanisms. Noiseless channels are ideal channels which assumes successful delivery for all data. However, noiseless channels are not available in real life. There are two categories of ARQ protocols: protocols for noisy channels and protocols for noiseless Channel. ARQ protocols are essential for peer-to-peer protocols that provide reliable data transmission. Automatic Repeat reQuest (ARQ) protocols are implemented at Data Link Control (DLC) sublayer of Data Link Layer (DLL) of Open System Interconnection (OSI) network model to provide error control mechanism and enable reliability of data transmission between different network nodes. The obtained results can be adopted and implemented in simulations of similar communication systems or approximating relevant systems.Ĭontrolling transmission errors is essential for data traffic between network nodes. Moreover, mean values of previous system parameters are derived. Results include: Probability Generating Functions (PGF) of system occupancy and waiting time. We study the distributions of system occupancy and waiting time when implementing Go-Back-N ARQ protocol in data transmission. The analysis uses Stochastic Process and a two-dimensional Markov Chain to present the proposed model. Many performance measures of Go-Back-N ARQ protocols are discussed. This paper presents a new mathematical model to analyze performance of Go-Back-N ARQ protocol over noisy channels. Types of ARQ protocols include Stop-and-wait ARQ, Go-Back-N ARQ, and Selective Repeat ARQ. ARQ protocols use acknowledgments and timeouts to satisfy reliable data transmission over noisy channels. They are used at Data Link Control (DLC) sublayer of Data Link Layer (DLL) of OSI (Open Systems Interconnection) network model to achieve flow and error control and provide smooth and reliable transmission between network nodes. Automatic Repeat reQuest (ARQ) protocols are used to control transmission errors in data communications.
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