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Physical layer structure usually is first considered to design a standard SoC in wireless sensor networks, while few practical works can be referenced. This paper presents detailed functional system modeling which obeys IEEE 802.15.4 protocol and performance analysis of three physical layer bands. Emphatically, the system includes a novel algorithm of de-spreading with minimum hamming distance and...
Carrier Aggregation (CA) is one of the important technologies to further improve the capacity of Long Term Evolution Advanced (LTE-A). When CA is conducted, a User Equipment (UE) will firstly select a Primary Serving Cell (PCell) for mobility support and then add Secondary Serving Cells (SCell) for higher experienced data rate. When and how to add/remove SCell is a very important issue, especially...
Based on the model of the hybrid structure of concrete filled with steel frame-reinforced concrete core-wall, this paper is aimed at study the structure's long-term performance under gravity, as well as all the contributions to the vertical deformation, vertical deformation differences and internal force of the structure that may affect the results of the calculation. The three-dimensional model of...
In LTE, AC barring check is performed by UEs before initiating an RRC connection. In some cells with a low access probability, the UEs may have to keep retrying access in the serving cell which results in higher connection failure and longer access delay. We therefore propose balancing the UEs by adjusting the cell reselection criteria based on the access probability in the serving cell and neighboring...
Long-term evolution (LTE) of the UMTS terrestrial radio access and radio access network is considered to ensure the competitiveness of 3GPP radio-access technology in a longer time frame. To minimize/optimize the user equipment (UE) power consumption, and further to support various services and large amount of data transmissions, a discontinuous reception (DRX) mechanism with adjustable DRX cycles...
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