International Journal of Research and Scientific Innovation (IJRSI) | Volume IV, Issue X, October 2017 | ISSN 2321–2705

Mathematical Comparison of throughput Analysis of ARQ Mechanism

Mayuri Kundu, Swarnendu K Chakraborty
Computer Science and Engineering, National Institute of Technology, Arunachal Pradesh, India-791112

Abstract—Aggressive Packet Combining (APC) scheme is the well-established protocol in case of reliable data transport in wireless network. APC has different type of limitations which includes low throughput. Several modifications are made in earlier researches to achieve higher throughput. In this particular we are establishing the existing work numerically. Throughput efficiency of the proposed method is higher than conventional ARQ technique.

Index Terms— Packet combining scheme Throughput, Aggressive Packet Combining (APC), Automatic Repeat Query (ARQ)

I. INTRODUCTION

There are basic two techniques by which accuracy of data communication is maintained, FEC (Forward error Correction) and BEC (Backward error Correction) [1-9] Packet combining scheme plays very important role in BEC and FEC. [10-15] And throughput is one of the major issues for transferring packet. Successful transmission of a packet implies achieving higher throughput. Several researches have done to achieve higher throughput by modifying the existing packet combining scheme [16]. Probability of successful transmission of packet for each scheme are also varied thus the corresponding throughput. In this paper the previous work is numerically analysed and compared with the other schemes.

II. BASIC BEC TECHNIQUES

Basic BEC techniques: Three basic techniques, these are there in BEC: 1) Stop-and-wait Automatic Repeat Request (S/W), 2) Go-Back-N automatic Repeat Request (GBN) and 3) Selective Repeat Request (SRQ) [3-10]. In case of S/W ARQ technique [4] an ACK (acknowledgement) message is send to the sender after successful reception of packet. After receiving the packet sender sends the next packet. On receiving a packet at receiver side, receiver checks whether the packet is correct or not. It uses error detection method. According to that, the receiver sends a positive acknowledgement (ACK) or a negative acknowledgement (NACK) to the transmitter by using the feedback path. After receiving ACK sender sends next packet but on receiving NACK sender retransmits the previous packet and it repeats the process until a packet delivered correctly.

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