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Energy minimization has been one of the major research challenges for access networks striving for green communication. Macrocell base stations (MBSs) are the main contributors to energy consumption, and the situation has become worse as more MBSs are being deployed to cope with the ever-increasing data traffic. Therefore, it will be crucial in the near future to minimize the energy consumption of...
Device-to-device transmission technology can help base stations achieve high transmission rates and meet high-capacity requirements. It is also a key technology for future markets. Additionally, the coexistence of licensed and unlicensed bands will be relevant to the landscape of the emerging 5th-generation cellular systems. However, there is a shortage of research on efficient transmission during...
This paper presents a fast and efficient transmission method for use in device-to-device (D2D)-assisted cellular networks. The proposed method is designed to be able to achieve short service time and reduce the number of blocked users subject to the condition that all users' transmission rates are satisfactory. Simulation results show that the proposed method has a much better average data rate and...
The small-cell base station (SBS) has emerged as a promising technology to improve the network coverage of a macro-cell base station (MBS) for green communications. With the plug-and-play property and without the auto-configuration ability, SBSs are installed unplannedly and unequally. Under such an occasion, it is important to reduce the energy consumption in two-tier MBS-SBS networks. In addition,...
In this paper, we present a quota-based dynamic network selection algorithm for accommodating access requests in a multi-network (HSPA+, HSDPA and UMTS) co-location environment, which is common for today's 3G operators. In most commercial networks, the accesses of individual users are often charged at a flat rate. In such a charging scheme, a few extremely heavy users may degrade the performance and...
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