Radio Resource Allocation Algorithms for OFDMA-based Cellular Networks
| Autor: | Yang, Zi-Yang, 楊梓洋 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 With limited spectrum in wireless communication, it is important to efficiently allocate resource to various users. Especially for typical mobile communication, device-to-device (D2D) communication, and massive machine type communication (mMTC), the growing data demands and massive connections are pushing the limits of the existing cellular networks. Hence, we focus on the scheduling algorithms on typical mobile communication, D2D, and mMTC, respectively. In the study of typical mobile communication, we propose a downlink scheduling algorithm for IEEE 802.16e under the adaptive modulation and coding (AMC) mode by which the modulation and coding scheme (MCS) of a user may be different for available subchannels. Given a set of user requests, the proposed algorithm efficiently allocates a two-dimension (time and frequency) burst with a suitable MCS to each user. In the study of D2D communication, the system capacity is improved by allocating multiple D2D links within the same resource, under appropriate interference control techniques. Hence, we propose a resource allocation algorithm that enables efficient spatial reuse. Given a set of D2D requests, the proposed algorithm greedily determines the resource for D2D links following the reliability criteria. In the study of mMTC, because MTC devices are battery operated and require a long battery life, power control is an important issue. However, it is difficult to handle massive devices in control plane. Hence, we propose a group-based power control scheme to achieve low power consumption and low signaling overhead. Based on proposed scheme, we formulate a scheduling problem and solve it with a greedy algorithm. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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