CSMA/CA channel synchronization using semaphore

Data collision in a channel leads to channel synchronization problem, which may arise due to the existence of hidden terminal node. CSMA, TDMA, ALOHA and many more protocols provide help to channel synchronization. Semaphore is a tool which deals with synchronization problem and can be used to provide channel synchronization in a communication link. In this paper a hybrid CSMA/CA-Semaphore approach is introduced to provide channel synchronization. As soon as the node gets access to the channel, it transmits its packet according to CSMA/CA protocol. This approach helps in reducing the total collisions and results in increasing the total efficiency.

I. Introduction

A channel is required to establish communication link in between two or more nodes [1] [2]. There may be a chance to collide data packet in the channel, when more than one node attempts to access the channel. These nodes form a network by sending their data over a shared channel as shown in fig. 1. Fig. 1.

A shared channel