Following recent commercial availability of autostereoscopic 3D displays that allow 3D visual data to be viewed without the use of special headgear or glasses, it is anticipated that the applications of 3D video will increase rapidly in near future. In this paper we propose a joint source channel coding scheme for depth image-based rendering based 3D video coding. We considered different source and channel coding rates to find the optimum coding performance under a given channel bit rate for a WiMAX based communication channel. When the optimum bit allocation combination for color and depth image sequences are found, different protection levels have been considered for coding both image sequences. Finally, an optimum protection levels are proposed for the best video quality.