ADAPTATION OF JOINT SOURCE-CHANNEL CODING TO OPTIMIZE THE BANDWIDTH TRANSMISSION VOICE OVER LTE NETWORK
Keywords:Calidad de la experiencia, Modelo-E, Voz sobre LTE, algoritmo adaptativo
In mobile communication systems over LTE, voice packets are transmitted over noisy channels that negatively affect the probability of losses. An important mechanism to combat packet loss is channel coding. The channel coding adds redundancy bits to the information packets to detect and correct errors in the detection process. This is the opposite of source coding that is responsible for eliminating re-abundance to minimize the rate of transmission. There is a compromise relationship between source and channel coding that influences the quality that users experience. In this research paper, a mechanism for optimizing the transmission ratio required in voice applications over LTE was implemented and evaluated based on finding an adequate relationship in the joint source-channel coding. The algorithm for coding selection is not original but has been modified so that it takes into account the qualitative evaluation ranges. The proposed changes have allowed an appreciable reduction in the transmission ratio required for a VoLTE connection concerning the original algorithm without changing the level in the qualitative scale of quality assessment.
How to Cite
The authors who publish in this journal agree to the following terms:
- The authors retain the copyright and guarantee to the journal the right to be the first publication of the work are distributed under a license of use and distribution "Creative Commons Attribution-NonCommercial-NoDerivativeWorks 3.0 Unported" (CC BY-NC-ND 3.0) You can consult from here the informative version and the legal text of the license that allows others to share the work with an acknowledgement of the authorship of the work and the initial publication in this journal.
- Authors may separately enter into additional agreements for non-exclusive distribution of the version of the work published in the journal (for example, placing it in an institutional repository or publishing it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are allowed and encouraged to disseminate their work electronically (e.g., in institutional repositories or on their own website) before and during the submission process, as this can lead to productive exchanges as well as earlier and greater citation of published work (see The Effect of Open Access).