Flexible Power Modeling of LTE Base Stations

With the explosion of wireless communications in number of users and data rates, the reduction of network power consumption becomes more and more critical. This is especially true for base stations which represent a dominant share of the total power in cellular networks. In order to study power reduction techniques, a convenient power model is required, providing estimates of the power consumption in different scenarios. This paper proposes such a model, accurate but simple to use. It evaluates the base station power consumption for different types of cells supporting the 3GPP LTE standard. It is flexible enough to enable comparisons between state-of-the-art and advanced configurations, and an easy adaptation to various scenarios. The model is based on a combination of base station components and sub-components as well as power scaling rules as functions of the main system parameters

On the Deployment Opportunities for Increasing Energy Efficiency in LTE-Advanced with Relay Nodes

The escalated growth of rapid and high volume communication of information is accompanied with various granular and distributed network architecture based on relaying techniques. The deployment issues of relay nodes in future cellular networks, e.g. LTE-A, are raised and investigated in this paper from energy efficiency perspective in two different levels: link level and system level. The link level study, coupled with a simple power model, gives preliminary insight of how the relay nodes’ position influence the overall energy efficiency. Then, a realistic relay power model based suitable for LTE-A systems is introduced. Finally, based on the realistic relay power model, different deployment options are exploited in various traffic scenarios for LTE-A system and energy efficient deployment suggestions are given

On the Deployment Opportunities for Increasing Energy Efficiency in LTE-Advanced with Relay Nodes

No abstract available

On the Deployment Opportunities for Increasing Energy Efficiency in LTE-Advanced with Relay Nodes

No abstract available

Analog/rf solutions enabling compact full-duplex radios

In-band full-duplex sets challenging requirements for wireless communication radios, in particular their capability to prevent receiver sensitivity degradation due to self-interference (transmit signals leaking into its own receiver). Previously published self-interference rejection designs require bulky components and/or antenna structures. This paper addresses this form-factor issue. First, compact radio transceiver feasibility bottlenecks are identified analytically, and tradeoff equations in function of link budget parameters are presented. These derivations indicate that the main bottlenecks can be resolved by increasing the isolation in analog/RF. Therefore, two design ideas are proposed, which provide attractive analog/RF-isolation and allow integration in compact radios. The first design proposal targets compact radio devices, such as small-cell base stations and tablet computers, and combines a dual-port polarized antenna with a self-tunable cancellation circuit. The second design proposal targets even more compact radio devices such as smartphones and sensor network nodes. This design builds on a tunable electrical balance isolator/duplexer in combination with a single-port miniature antenna. The electrical balance circuit can be implemented for scaled CMOS technology, facilitating low cost and dense integration