Zhijian Lin

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—The spectrum scarcity is a serious problem for future development of wireless communication. The current researches on Cognitive Radio (CR) technologies and secondary usage of the spectrum have received a lot of attention. However, in CR networks, secondary users (SUs) should spend a large number of times for spectrum sensing. In this paper, we propose a(More)
Device-to-device (D2D) communication, which is defined as a direct communication between two mobile users without traversing the Base Station (BS) or the core network to offload the increasing traffic to the user equipments, is one of the key technologies in the fifth generation (5G) of wireless communication systems. Discovery and communication are the(More)
Device-to-Device (D2D) Communication is an innovative mobile network technology, which is one of the key technologies in LTE-Advanced system. D2D communication can realize cellular users directly connect to transfer data under the eNodeB's control. This technology brings higher system capacity and mitigates the eNodeB's load. In order to evaluate the(More)
Based on the in-depth research on random access procedure in WCDMA system, the paper proposes an acquisition method of Acquisition Indicator Channel (AICH).That method is grounded on the transmitted power offset between AICH and Primary Common Control Physical Channel (P-CPICH) to deduce the Decision Threshold of acquiring AICH. In the procedure of(More)
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