Stydy On Self-Optimize Based Energy Saving Technology In LTE System

Nowadays, the global warming problem resulting from a large amount emission of greenhouse gases has become more and more serious, which leads to that energy saving and emission reduction becomes the issue humankind is faced with. Long term evolution(LTE), on behalf of next generation communication technologies, not only has to improve in the respects of frequency spectrum utilization, communication bit rate and guaranteeing quality of service(QoS), but also has to reduce system power consumption as much as possible. Traditional research mainly focused on policy adjustments and green energy resource development and paid little attention in improvement of communication technology. Integrating existing communication technology, this paper proposes three energy conservation schemes.Tidal effect is one of the characters of mobile communication, which means that there exists huge gap between crest and trough of network flow. However, the design of communication system is based on the maximum demand of users. Therefore, a large number of system devices are in the state of no-load when the flow of system is low, which cause serious waste of energy. According to this phenomenon, we present two energy conservation schemes applying in different scenario. In the "hot spot" areas of network deployment, the base stations are distributed in high density. If the maximum coverage of a base station is more than its actual coverage, the neighboring cells would be covered by it. Hence, base station dynamic switch energy saving technology could be adopted in this scenario. Through shutting down some base stations during low network flow period could we achieve lower system energy consumption. On the contrary, in the normal areas of network deployment, the coverage of neighboring cells doesn’t overlap and turning off some base stations perhaps would generate irreparable dead zones in the system. In this scenario, a carrier frequency switch scheme is proposed which refer to reserve part of carrier frequency to operate normally and turn off other frequency to decrease transmitted power of base stations when the network flow is low. Besides, during high network flow period, the frequency of base station is fully used, which would improve the energy utilization efficiency and achieve low carbon energy communication.Game theory has developed rapidly in recent years. Because of the notable benefit it brings in the process of solving contradictory issue, its application fields have expanded from economics to various subjects. In the course of communication, users not only expect large received signal power to obtain good QoS, but also hope reducing signal power of other users to decrease interference. Meanwhile, network operators also manage to achieve the lowest power consumption under the restriction of ensuring communication quality of users’. Bringing potential games theory into solving communication energy conservation problem, we search the equilibrium point among the game parties to reduce the system energy on the premise of guaranteeing users’QoS.Although applying in different scenario, three energy saving scheme proposed in this paper are not conflict with each other and they can be combined to achieve better results in practical applications.