**2. The QoS guaranteed energy-efficient scheduling for IEEE 802.16e**

In this section, we first describe the basic idea of our algorithm for QoS guaranteed energyefficient scheduling. Second, we define the notations of our system model. Finally, we schedule packets in an MSS with our QoS guaranteed energy-efficient scheduling. Additionally, we consider the QoS requirements of jitter constraint to schedule the packets and achieve the guarantees of transmissions.
