||With the advances in wireless mobile communications and process technology, Smart UE functionality becomes more and more important. In addition to traditional phone calls, sending text messages, Web browsing, video streaming and other Web-related applications become even more indispensable function.|
In order to provide these services, user equipment must always connect with the base station for data exchange, which makes the equipment power consumption dramatically. To solve this problem, the LTE proposes Discontinuous Reception mechanism, through the RF module off to reduce power consumption. However, because the requirement for multiple QoS connection on equipment arising from variety of services, leading DRX mechanisms lost their proper function.
In order to solve the problems caused by the multiple QoS connection, this thesis proposes a P-W rescheduling algorithm. We add a mechanism to judge on the original DRX mechanism with QoS requirements and user′s channel condition (CQI) as a basis for judgment, so that the base station can appropriately adjusts DRC cycle usage. We also add a weighted comparison mechanism to the algorithm which is based on QoS requirements of users to calculate the transmission priority order, so that the base station can reliably perform user data transmission schedule.
The simulation results confirm the P-W rescheduling algorithm which can really improve the efficiency of DRX mechanism, and ensure QoS requirements of users that can be met.
|| ITU-R Rep.M.2134,“Requirements Related to Technical Performance for IMT-Advanced Radio Interface(s)”,Nov.2008.|
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