Packet Loss Optimization In VoLTE Based On AMR-WB Codec Application Level

The way of LTE(Long Term Evolution) networks providing voice service is verydifferent with the2G/3G network, due to the LTE system is IP-based mobilecommunication system.So at the beginning of the LTE,the mobile communication operatorsmainly adopt the SV-LTE(Simultaneous Voice and LTE) or CSFB(Circuit SwitchedFallback) to ensure the normal practice of voice service.But VoLTE(Voice over LTE) willbe the final solutinon of voice service in the future LTE networks. In view of VoLTEnetwork,although mobile communication operators have take some optimization measuresin EPS(Evoled Packet System) domain and IMS(IP Multimedia Subsystem) domain on thetelecommunication level, making the VoLTE take up the priority of network resources ishigher than the way of providing voice through VoIP(Voice over Internet Protocol). But atthe same time,VoLTE also faces the problems in the VoIP, solving the problem of likepacket loss, delay and jitter are the key point of real-time voice service.This article focuseson the potential of VoLTE system, putting forward an optimized scheme on the applicationlevel about the packet loss.The optimized scheme is based on the optimized scheme ofAMR-WB codec for VoLTE,which can work in the same network framework of LTE.Thework of this paper is mainly as follows:(1) Analysis of the traditional network packet loss, and one of the traditional networkpacket loss recovery algorithms is simulated and analyzed,which proves that,taking certainmeasures of packet loss processing algorithm can improve the reliability of the network.(2) Analyzes each important parameter of AMR-WB codec with experiments,simulating the packet loss for AMR-WB codec optimization algorithm. Analyzing networktransmission frame format of AMR-WB codec, in order to provide the possibility for theimplementation of the proposed scheme.(3) VoLTE system are introduced in detail, the mobile communication operators inorder to provide QoS guarantee take some optimization measures on telecommunicationlevel. By MDC algorithm, Punctured convolutional code, this paper puts forward forAMR-WB codec packet loss optimization scheme, the proposed scheme, in the don’t needto modify the network framework and the increase in network bandwidth, can in somecases, the packet loss rate to improve the reliability of the system of network transmission.