Evaluation of time characteristics of the majority treatment of synchronizing information in PRS-oriented MAC multiple access protocols

To select the synchronization system parameters that provide the best efficiency, it is necessary to obtain temporal characteristics; for this purpose, the authors estimated the average search time for a pseudo-random sequence (PRS) through solving the problem of system analysis of the time characteristics of the majority processing of synchronization information. The article formulated and solved the problem of analyzing time characteristics for the synchronization method of the PRS based on the majority processing of the PRS segments, in which it was required to find the average search time for the PRS. Analytical relationships were obtained for the average search time of the memory bandwidth, calculations and systematic analysis of the results were performed. It is shown that an increase in the length of the processed segment (test segment) will inevitably lead to an increase in the time the system enters synchronization, due to the reception of additional PSP bits involved in the checks.

A Survey on Synchronization Approach in MAC Layer Protocols

The Open Systems Interconnection (OSI) model describes the layered approach for communication between two networked systems. The Data link layer of OSI model consists of a sub layer known as MAC layer for achieving coordination among the communicating nodes to access the shared channel. This channel is shared between multiple nodes in a communication network and the packets transmitted at same time by different nodes collide with each other. This situation leads to loss of data and bandwidth gets wasted. To avoid this situation, MAC layer supports various protocols: TDMA, ALOHA, CSMA/CD, CSMA/CA and many hybrid techniques which employ their own criteria of synchronization for minimizing the collisions. In this paper the authors discuss about the MAC layer and the multiple access protocols which it supports for achieving synchronization among the nodes in the channel.