| Summary: | 碩士 === 國立中央大學 === 通訊工程學系 === 103 === Nowadays, thanks to the evolution of mobile communication, number of mobile equipment is increasing and bandwidth is also growing. Communication research wants to find how to achieve maximum throughput in the limited bandwidth. But, satisfaction of user was talk about rarely in studies. It’s an important issue under the trend of mobile communication.
In order to overcome the problem of frequency reuse in communication systems in uplink, we propose the Device-to-Device communication to improve the problem of crowded resource. D2D communication allows user in close proximity to communicate directly without through the base station. After construct the D2D communications network, we face new interference, e.g. the interference from D2D user to base station, interference between difference D2D pairs and interference between cellular user and D2D user.
In order to clear up the complicated interference problems, we divided user’s requirement data into three parts, and proposed an algorithm based on user satisfaction index. The proposed scheme not only reduces the interference, but also maximum user satisfaction index.
Simulation results show that, our algorithm was suitable for a larger number of users. Because proposed algorithm is not only superior in system throughput, but also can receive higher user satisfaction index than others when system users growing.
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