A Design of Packet Scheduling Algorithm to Enhance QoS in High-Speed Downlink Packet Access (HSDPA) Core Network

Abstract

Voice over Internet Protocol (VOIP) in an efficient manner is a basic requirement of modern era. The real time and non-real traffics demand customized communication provisioning to get guarantee of service. For this we proposed a user fulfillment design for facilitating packets switching in 3G cellular network to insure provisioning of QoS (quality of service) in DiffServ (Differentiated Services) Network. To enhance QoS for real time traffic by reducing delay, packet loss and jitter, we proposed Low latency queuing (LLQ) algorithm. In this paper, we focused on packet scheduling, Diffserv and QoS classes mapping into Universal Mobile telecommunication System (UMTS) classes and buffering. To associate different types of real time multimedia traffic, the QoS provisioning mechanism used different code points of Diffserv. The new idea in LLQ is to map the video and voice traffics against two separate queues and used priority queuing in Low latency queuing for voice traffic. The results got from reproductions shows that proposed calculation meets the QoS prerequisites.

Packet Loss Optimization in Router Forwarding Tasks Based on the Particle Swarm Algorithm

“…Ahmed et al [23] investigated the quality of service for real-time traffic to improve the performance of the end-to-end network. To achieve this aim, they proposed a low latency queue (LLQ) packet-scheduling algorithm.…”

“…The same generated packets in the framework are also scheduled using the conventional round-robin algorithm, and the result of the round-robin algorithm is computed using Equation (4). The proposed psoWRR is compared with references [21,23] according to the packet loss ratio, and the result are shown in Table 2. In psoWRR algorithm, packet loss ratio is calculated using Equation ( 5) for 100 times repeated experiments to the algorithm.…”

“…Packet Loss Ratio FDWFQ [21] 35% LLQ [23] 7% (only for voice packets) psoWRR 7% (for all types of packets)…”

“…The proposed psoWRR algorithm is implemented within a framework and simulates scheduling packets in a router. The proposed algorithm and framework were tested using a number of experiments, and the comparison of the results of psoWRR, round robin, and the related works [21,23] shows that the proposed algorithm is better to schedule a larger number of packets within a specific time. Additionally, the proposed algorithm reduces the problem of packet loss that results from the starvation of low-priority packets.…”

“…Additionally, the proposed algorithm reduces the problem of packet loss that results from the starvation of low-priority packets. Moreover, the work in [23] reduces the packet loss of voice packets using an LLQ. However, other types of packets will suffer more from packet loss due to using LLQ.…”