Quality of Service based packet scheduling to support video streaming service for Next Generation Wireless Mobile Network

摘要

Next generation wireless mobile networks is a vast area of research and has many design issues like throughput, delay, packet loss, etc. which deals with data transmission and packet scheduling techniques. Based on the above issues, we focus on data packet delivery based on priority and fairness with minimum delay and jitter. In this proposed paper, we are dealing with packet scheduling of multimedia and non-multimedia data based on priority. According to the application, real-time data packet should be considered as a higher priority, and non-real-time data packet should be considered as a lower priority. Packet scheduler is a decision-making algorithm that selects or drops the packet based on the network load, packet size, bandwidth, and Packet arrival rate, the deadline of packets, quality of the channel, signal to noise ratio (SNR), and type of traffic. Packet scheduling algorithm is the NP-complete algorithm. It becomes very difficult to handle when all packets are coming in with high packet rate, high packet size, and with low bandwidth. Therefore all the packets may not reach the destination or base station. Some of the packets may be dropped due to these mentioned reasons of network characteristics. Many packets scheduling algorithms are generally used to assurance packet data quality of service and transmission rate in wireless mobile Network. In our proposed work longest waiting time first with the fair scheduler and intelligent buffering techniques are used to enhance the quality of service of packet scheduler in Next Generation Mobile Networks. The priority of longest waiting packets is increased for fair scheduling of packets to avoid starvation. Intelligent or dynamic buffering technique is used to reduce the packet loss or to drop of packets during peak time and weak signals of OFDMA channels. In this technique buffer size is calculated dynamically based on network condition and adjusted as per the evaluated value. For buffer size calculation it takes following parameters into consideration 1) packet arrival rate 2) quality of signal and 3) bandwidth. The suggested packet scheduling algorithm constantly updates the control parameter to follow an effective balance between the Quality of Service of video flooding and the network throughput.