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This paper addresses the robust beamforming design for a downlink cloud radio access network (cloud RAN) subject to per-base-station (BS) power constraint and individual signal-to-interference-plus-noise ratio (SINR) requirements. Our objective is to minimize the overall network power and backhaul cost while guaranteeing the users' SINR constraints for every channel realization by designing the joint...
The high energy consumption has become one bottleneck in the development of the data centers (DCs), where the main energy consumers are the cooling system and the servers. Therefore, the joint optimization for the energy efficiency of the cooling system and the servers is a crucial problem, while most of previous works on energy saving only studies one of these two components in an isolated manner...
A low-power system of RFID sensor networks was designed in this paper, which was used to solve the high energy consumption caused by collision. The architecture of RFID sensor networks based on intelligent node was used in this system, and the intelligent node was composed of an RFID reader and a sensor node through the MCU of MSP430. The channel of WSN was utilized to control the reading of RFID...
Power efficiency has been recognized as an important factor of the computing technology. On-chip caches represent a sizable faction of the total power consumption of microprocessors. Non-uniform cache access (NUCA) cache split the cache into several tiles, which enables the ability to power down some tiles at run time. We observed that some workloads have related small working set, thus we can dynamic...
This paper presents transistor-level design of a continuous-time (CT) reconfigurable ΔΣ modulator in a 1.2 V 65 nm CMOS process. Both architectural- and circuit-level power-optimization techniques, such as flexible loop order and quantizer bit, switchable OTA unit cells, and folding flash ADC, are utilized to achieve power efficiency over all bandwidths. As gate leakage current in 65 nm technology...
A 12-bit 60 MS/s SHA-less opamp sharing pipeline ADC utilizing switch-embedded dual-input current-reused opamp is presented in this paper. The proposed opamp sharing technique reduces the power consumption without suffering from memory effect. Two-phase overlapping clocks are proposed to ensure analog transistors in the common-mode feedback (CMFB) loop to always work in saturation thus avoiding common...
The performance of a vehicle control strategy, in terms of fuel economy improvement and emission reduction, is strongly influenced by driving conditions and drivers' driving styles. The term of ‘driving conditions’ here means the traffic conditions and road type, which is usually indicated by standard driving cycles, say FTP 75 and NEDC; the term of ‘driving styles’ here relates to the drivers' behavior,...
Nowadays, one of the most important goals of data center management is to maximize their profit by minimizing power consumption and service-level agreement (SLA) violations of hosted applications. System dynamics make it difficult to implement optimization in both aspects on shared infrastructures. A majority of existing works either focused on one aspect or applied models that are trained offline...
Nowadays, increasing importance has been attached to power management in modern data centers. A lot of solutions have been produced to reduce power consumption without producing an effect on quality of service. One common way is to associate with virtualization technology that has been widely used in data centers. This is due to not only its features of reliability and ease of management,but also...
Virtualization Technology has been employed increasingly widely in modern data centers in order to improve its energy efficiency. In particular, the capability of virtual machine(VM) migration brings multiple benefits for such as resources(CPU, memory, et al.) distribution, energy aware consolidation. However, the migration of virtual machines itself brings extra power consumption. For this reason,...
In this paper, we discuss resource management in modern wireless communications with the objective of minimizing power consumption, and carry out an analysis of simultaneous transmission and orthogonal transmission schemes in an FDMA (Frequency Division Multiple Access) framework. Based on a two-link line model with path-loss only, the performance of these two schemes for network power minimization...
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