In this paper, the authors provide a performance analysis for real-time services with a limited bandwidth in a mobile WiMAX network. Mobile WiMAX can be efficiently used for real-time services with a theoretical maximum bandwidth of 120 Mbps and maximum transmission range of 50 km. The IEEE802.16e standard, also bring multiple antenna support through multiple input multiple output communication. This brings potential benefits in terms of coverage, power consumption, and frequency reuse and bandwidth efficiency by addition of full mobility support. The main contribution of this paper is that they could use different users with different speed by using different mobility model such as random waypoint model and flag mobility model.