12,899 research outputs found
Towards a deployment tool for wireless access networks with minimal power consumption
The power consumption of wireless access networks will become an important issue in the coming years. In this paper, the power consumption of base stations for mobile WiMAX, HSPA, and LTE is modelled. This power consumption is related to the coverage of the base station. The considered technologies are compared according to their energy efficiency for different bit rates at a bandwidth of 5 MHz. For this particular case and based on the assumptions of parameters of the specifications, HSPA is the least energy-efficient technology. Until a bit rate of 11 Mbps LTE is the most energy-efficient while for higher bit rates mobile WiMAX performs the best. Furthermore the influence of MIMO is investigated. A decrease of about 80% for mobile WiMAX and about 74% for HSPA and LTE for the power consumption per covered area is found for a 4*4 MIMO system compared to a SISO system. The introduction of MIMO has thus a positive influence on the energy efficiency of the considered technologies. The power consumption and coverage model for base stations is then used to develop a prediction tool for power consumption in wireless access networks
Designing energy-efficient wireless access networks: LTE and LTE-advanced
As large energy consumers, base stations need energy-efficient wireless access networks. This article compares the design of Long-Term Evolution (LTE) networks to energy-efficient LTE-Advanced networks. LIE-Advanced introduces three new functionalities - carrier aggregation, heterogeneous networks, and extended multiple-input, multiple-output (MIMO) support. The authors develop a power consumption model for LIE and LIE-Advanced macrocell and femtocell base stations, along with an energy efficiency measure. They show that LIE-Advanced's carrier aggregation and MIMO improve networks' energy efficiency up to 400 and 450 percent, respectively
Feasibility of Simultaneous Information and Energy Transfer in LTE-A Small Cell Networks
Simultaneous information and energy transfer is attracting much attention as
an effective method to provide green energy supply for mobiles. However the
very low power level of the harvested energy from RF spectrum limits the
application of such technique. Thanks to the improvement of sensitivity and
efficiency of RF energy harvesting circuit as well as the dense deployment of
small cells base stations, the SIET becomes more practical. In this paper, we
propose a unified receiver model for SIET in LTE-A small cell base staion
networks, formulate the feasibility problem with Poisson point process model
and analysis the feasibility for a special and practical senario. The results
shows that it is feasible for mobiles to charge the secondary battery wih
harvested energy from BSs, but it is still infeasible to directly charge the
primary battery or operate without any battery at all
Sleep Period Optimization Model For Layered Video Service Delivery Over eMBMS Networks
Long Term Evolution-Advanced (LTE-A) and the evolved Multimedia Broadcast
Multicast System (eMBMS) are the most promising technologies for the delivery
of highly bandwidth demanding applications. In this paper we propose a green
resource allocation strategy for the delivery of layered video streams to users
with different propagation conditions. The goal of the proposed model is to
minimize the user energy consumption. That goal is achieved by minimizing the
time required by each user to receive the broadcast data via an efficient power
transmission allocation model. A key point in our system model is that the
reliability of layered video communications is ensured by means of the Random
Linear Network Coding (RLNC) approach. Analytical results show that the
proposed resource allocation model ensures the desired quality of service
constraints, while the user energy footprint is significantly reduced.Comment: Proc. of IEEE ICC 2015, Selected Areas in Communications Symposium -
Green Communications Track, to appea
Fast Power and Energy Efficiency Analysis of FPGA-based Wireless Base-band Processing
Nowadays, demands for high performance keep on increasing in the wireless
communication domain. This leads to a consistent rise of the complexity and
designing such systems has become a challenging task. In this context, energy
efficiency is considered as a key topic, especially for embedded systems in
which design space is often very constrained. In this paper, a fast and
accurate power estimation approach for FPGA-based hardware systems is applied
to a typical wireless communication system. It aims at providing power
estimates of complete systems prior to their implementations. This is made
possible by using a dedicated library of high-level models that are
representative of hardware IPs. Based on high-level simulations, design space
exploration is made a lot faster and easier. The definition of a scenario and
the monitoring of IP's time-activities facilitate the comparison of several
domain-specific systems. The proposed approach and its benefits are
demonstrated through a typical use case in the wireless communication domain.Comment: Presented at HIP3ES, 201
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