A Congestion Avoidance Evaluation for Voice & Video Over LTE
In some festival season, a most of people started to send wishing messages, or started to make voice and video Conference Calls, which can cause Network congestion phenomena. To resolve this problematic 3GPP has developed a new cellular standard based packet switching allowing high data rate, 100 Mbps in Downlink and 50 Mbps in Uplink, and having the flexibility to be used in different bandwidths ranging from 1.4 MHz up to 20 MHz, this standard is termed LTE (Long Term Evolution).LTE aims to provide a highly efficient, low latency, spectrum flexibility and high capacity to avoid network congestion. The purpose of this paper is to evaluate the congestion avoidance capacity for LTE Network. The performance evaluation is conducted in terms of system throughput, delay, and Packet Loss Ratio, using different scheduling algorithms implemented at the LTE base station (PF, MLWDF and EXP/PF schedulers). Finally it will be concluded that the M-LWDF Scheduling algorithm is the most suitable for all the flows while the EXP/PF algorithm didn’t show a big capacity to avoid congestion for VoIP flows and for the PF algorithm and due to it high delay, big packet loss ratio and low throughput, it’s didn’t demonstrate high performances.
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