Analysis of Random Access Protocol and Channel Allocation Schemes for Service Differentiation in Cellular Networks


Analysis of Random Access Protocol and Channel Allocation Schemes for Service Differentiation in Cellular Networks
Published in:	Innovation in Engineering, Technology and Education for Competitiveness and Prosperity: Proceedings of the 11th Latin American and Caribbean Conference for Engineering and Technology
Date of Conference:	August 14-16, 2013
Location of Conference:	Cancun, Mexico
Authors:	Mario Eduardo Rivero-Angeles Izlian Y. Orea-Flores
Refereed Paper:	#62

Abstract:
In English: In this work, the effect of the channel allocation scheme on the priority based Slotted ALOHA (S-ALOHA) random access protocol when blocked packets return to the network is presented. Service differentiation is considered for high and low priority users. Priority based S-ALOHA is implemented using a Geometric Backoff (GB) scheme by means of two retransmission probabilities. Two channel allocation schemes that implement priority queues for service differentiation in a TDMA based cellular network are considered: Bitmap Channel Allocation (BCA) and Uplink State Flag Channel Allocation (USFCA). In order to improve the system performance, new packet transmissions for low priority packets are differed (DFT) effectively increasing the throughput on the random access channel and reducing the average waiting time and access delay.