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Analysis of Blocking Probability in a Relay-Based Cellular OFDMA Network

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Title Analysis of Blocking Probability in a Relay-Based Cellular OFDMA Network
 
Creator MEHTA, M
JAIN, RB
KARANDIKAR, A
 
Subject SUMS
OFDMA network
Relay
Blocking probability
Cellular
SINR
 
Description Relay deployment in orthogonal frequency division multiple access (OFDMA) based cellular networks helps in coverage extension and/or capacity improvement. To quantify capacity improvement, blocking probability of voice call is typically calculated using Erlang B formula. This calculation is based on the assumption that all users require same amount of resources to satisfy their rate requirement. However, in an OFDMA system, each user requires different number of subcarriers to meet its rate requirement. This resource requirement depends on the signal to interference ratio (SIR) experienced by a user. Therefore, the Erlang B formula can not be employed to compute blocking probability in an OFDMA network. In this paper, we determine an analytical expression to compute the blocking probability in a relay based cellular OFDMA network. We determine an expression of the probability distribution of the user's resource requirement based on its experienced SIR. Then, we classify the users into various classes depending upon their subcarrier requirement. We consider the system to be a multi-dimensional system with different classes and evaluate the blocking probability using the multi-dimensional Erlang loss formulas. This model is useful in the performance evaluation, design, planning of resources and call admission control in a relay based cellular OFDMA networks like long term evolution.
 
Publisher SPRINGER
 
Date 2016-01-14T12:18:00Z
2016-01-14T12:18:00Z
2015
 
Type Article
 
Identifier WIRELESS PERSONAL COMMUNICATIONS, 84(4)2467-2492
0929-6212
1572-834X
http://dx.doi.org/10.1007/s11277-015-2715-5
http://dspace.library.iitb.ac.in/jspui/handle/100/17477
 
Language en