A Novel Ameliorated Slotted ALOHA Protocol

Abstract

Abstract-Aloha or later slotted Aloha is known as the first protocol for packet radio network and a classic example of random access protocol. However, their performance is not promising as they can only achieve maximum throughput of 18% and 36% for Aloha and slotted Aloha, respectively. Moreover it will be unstable for increasing traffic. An improvement protocol to raise the performance of slotted Aloha, based on slot reservation for managing collision in slotted Aloha system is proposed. Using this method, the chance of a re-collision for retransmitted packets is minimized. This paper studied the performance of Aloha, slotted Aloha and the proposed improved protocol using smpl simulation library to simulate the system. The results show that the simulation designed for Aloha and Slotted Aloha conform to the theoretical data. It also shows that the protocol improvement can raise the performance of Slotted aloha about 3.5%. Analysis is provided for each simulation data.