Abstract
Traditional mobile networks will become dual-layer wireless networks due to small cells’ deployment. The advantages of dual-layer networks are improving network capacity and overcoming the problem of unbalanced traffic distribution in time-space domain. In this paper, performance of small cells deployment is evaluated in simulations. It is shown that users’ traffic is offloaded by small cells obviously. At the same time, performances of signal to interference plus noise ratio (SINR) and throughput are also improved. However, low SINR ([Formula: see text] dB) users are also increased because of interferences between macro cells and small cells. Furthermore, a new cooperation scheme is proposed for energy saving in dual-layer networks. This scheme is implemented through a functional modular, named by Area Control Center (ACC). Finally, simulations are given to verify the efficiency of this energy saving scheme. The numerical results show that energy consumption could be reduced by 20%.
Highlights
With the rapid development of mobile Internet services, the traditional wireless networks are faced with large challenges
It is an effective method to overcome the problem of unbalanced traffic distribution in time-space domain [2]
Traditional cellular networks usually consist of macro cells, which are deployed in monolayer to maximize the coverage and minimize the interferences
Summary
With the rapid development of mobile Internet services, the traditional wireless networks are faced with large challenges. As data services are increasingly visited by mobile terminal users, traffic load of wireless communication networks is rising rapidly. The traditional wireless networks, which are mostly monolayer coverage with radio resource limited, could not afford so large traffic load. The performance improvements of small cell deployment need to be evaluated. As more and more small cells are deployed, energy saving should be taken into consideration. Those questions will be studied in the paper.
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