1) The document summarizes research from the Centre for Communication Systems Research (CCSR) at the University of Surrey on improving the energy efficiency of 5G networks.
2) Key areas discussed include adaptive clustering algorithms, coordinated multipoint transmission, and the tradeoff between energy and spectral efficiency.
3) Results showed that adaptive clustering can minimize energy waste for users not helped by cooperation, and virtual MIMO systems can outperform non-cooperative systems but require more energy for cooperation.
Modeling and Analysis of Energy Efficient Cellular Networksijtsrd
Energy consumption has become a primary concern in design and operation of wireless communication networks due to two main reasons- Environmental concerns and Cost. The next generation network systems will have to consider energy efficient designs in any aspect. The 5G network which is most awaited today though proposes better data rates but also speaks about energy efficiency in its agenda. Iram Masood Hamdani | Raj Kumar Jain "Modeling and Analysis of Energy Efficient Cellular Networks" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21381.pdf
Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/21381/modeling-and-analysis-of-energy-efficient-cellular-networks/iram-masood-hamdani
A Framework for Optimizing the Process of Energy Harvesting from Ambient RF S...IJECEIAES
Energy harvesting has been an active research topic in the past half a decade with respect to wireless networks. We reviewed some of the recent techniques towards improving energy harvesting performance to find that there is a large scope of improvement in terms of optimization and addressing problems pertaining to low-powered communicating mobile nodes. Therefore, we present a framework for identifying available RF sources of energy and constructing a robust link between the energy source and the mobile device. We apply linear optimization approach to enhance the performance of energy harvesting. Probabilility theory is used for identification of event loss in the presence of different number of nodes as well as node distances. The objective of the proposed system is to offer better availability of RF signals as well as better probability of energy harvesting for mobile devices. The proposed technique is also found to be computationally cost effective.
Novel Optimization to Reduce Power Drainage in Mobile Devices for Multicarrie...IJECEIAES
With increasing adoption of multicarrier-based communications e.g. 3G and 4G, the users are significantly benefited with impressive data rate but at the cost of battery life of their mobile devices. We reviewed the existing techniques to find an open research gap in this regard. This paper presents a novel framework where an optimization is carried out with the objective function to maintain higher level of equilibrium between maximized data delivery and minimized transmit power. An analytical model considering multiple radio antennae in the mobile device is presented with constraint formulations of data quality and threshold power factor. The model outcome is evaluated with respect to amount of power being conserved as performance factor. The study was found to offer maximum energy conservation and the framework also suits well with existing communication system of mobile networks.
Modeling and Analysis of Energy Efficient Cellular Networksijtsrd
Energy consumption has become a primary concern in design and operation of wireless communication networks due to two main reasons- Environmental concerns and Cost. The next generation network systems will have to consider energy efficient designs in any aspect. The 5G network which is most awaited today though proposes better data rates but also speaks about energy efficiency in its agenda. Iram Masood Hamdani | Raj Kumar Jain "Modeling and Analysis of Energy Efficient Cellular Networks" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd21381.pdf
Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/21381/modeling-and-analysis-of-energy-efficient-cellular-networks/iram-masood-hamdani
A Framework for Optimizing the Process of Energy Harvesting from Ambient RF S...IJECEIAES
Energy harvesting has been an active research topic in the past half a decade with respect to wireless networks. We reviewed some of the recent techniques towards improving energy harvesting performance to find that there is a large scope of improvement in terms of optimization and addressing problems pertaining to low-powered communicating mobile nodes. Therefore, we present a framework for identifying available RF sources of energy and constructing a robust link between the energy source and the mobile device. We apply linear optimization approach to enhance the performance of energy harvesting. Probabilility theory is used for identification of event loss in the presence of different number of nodes as well as node distances. The objective of the proposed system is to offer better availability of RF signals as well as better probability of energy harvesting for mobile devices. The proposed technique is also found to be computationally cost effective.
Novel Optimization to Reduce Power Drainage in Mobile Devices for Multicarrie...IJECEIAES
With increasing adoption of multicarrier-based communications e.g. 3G and 4G, the users are significantly benefited with impressive data rate but at the cost of battery life of their mobile devices. We reviewed the existing techniques to find an open research gap in this regard. This paper presents a novel framework where an optimization is carried out with the objective function to maintain higher level of equilibrium between maximized data delivery and minimized transmit power. An analytical model considering multiple radio antennae in the mobile device is presented with constraint formulations of data quality and threshold power factor. The model outcome is evaluated with respect to amount of power being conserved as performance factor. The study was found to offer maximum energy conservation and the framework also suits well with existing communication system of mobile networks.
Optimization Modeling and Decision Support for Wireless Infrastructure Deploy...streamspotter
Michael R. Bartolacci, Albena Mihovska, and Dilek Ozceylan on "Optimization Modeling and Decision Support for Wireless Infrastructure Deployment in Disaster Planning and Management" at ISCRAM 2013 in Baden-Baden.
10th International Conference on Information Systems for Crisis Response and Management
12-15 May 2013, Baden-Baden, Germany
Causes of Fiber Cut and the Recommendation to Solve the ProblemIOSRJECE
Optical fiber technology has transformed the telecom landscape in Ghana in recent years owing to its overwhelming advantages over the traditional transmission medium. Though the technology is highly immune to electromagnetic wave, it also offers a higher capacity of bandwidth for data and voice activities. The fiber infrastructure in Ghana has experienced a lot of fiber cuts incidences. And this has affected network quality delivery, increased operational expenditure and decline revenue margins of the telcos. This research was carried out in two phases using MTN Ghana (Western and Central Region) as a case study, to establish the root causes and remedial actions to curb it. First, Pareto and Ishakawa analytical tools were applied to the primary source data for the analysis. Secondly, a purposive survey was administered to acquire additional information. It was established that activities of government sponsored projects and private developers were largely responsible for the menace due to; negligence, ignorance, lack of coordination etc. On the bases, it’s recommended that telcos and stakeholders embark on educational campaign to sensitize the public on optical fiber cables whiles the government of Ghana put in measures to build mandatory right-of-way with support from the private sector.
Telecommunication Systems: How is Technology Change Creating New Opportunitie...Jeffrey Funk
These slides discuss how improvements in the data rates of wireline and wireless systems have and continue to occur. For wireline systems, these improvements are driven by the use of better glass fiber, lasers, amplifiers, and wavelength division multiplexing and there appears to be few limits to these improvements. For wireless systems, these improvements are primarily driven by the use of better ICs. As long as these improvements in ICs continue to occur, improvements in data rates along with improvements in the use of the frequency spectrum continue to be possible. Improvements in both wireless and wireline systems will also make new forms of Internet content possible. Furthermore, these improvements in ICs along with the improvements in MEMS that are discussed in a related set of slides are gradually making cognitive radio economically feasible. All of these improvements are creating various kinds of entrepreneurial opportunities. These slides are based on a forthcoming book entitled “Technology Change and the Rise of New Industries and they are the sixth session in a course entitled “Analyzing Hi-Tech Opportunities.”
What is VLC
Visible light & Spectrum
VLC process
-Transmitter
-Receiver
-Modulation
VLC characteristics
Comparison with RF & IR
Demerits of VLC
Applications
Why Fiber Optics Should be Preferred for Internet Connectionmecarlhooper
Nowadays, people are looking for better ways to enhance their internet connectivity for faster speed and reliable connection. One of the most sought-after internet connection mediums is the use of fiber optics or fiber optical cable. The fiber optical cables have brought a revolution in the world of internet connectivity. There are many advantages of using fiber optics. Go through the slide to know why fiber optics should be preferred for internet connection.
Presentation at ITU Workshop on "ICT Innovations in Emerging Economies", OFDM...Mohamed Siala
Presentation on transmit and receive waveforms optimization for future 5G cellular communication systems at the ITU Workshop on "ICT Innovations in Emerging Economies", Geneva, Switzerland, 18 September 2013, entitled "OFDMA with Optimized Transmit and Receive Waveforms for Better Interference Immune Communications in Next Generation Radio Mobile Communication Systems."
The innovative and effective use of information and communication technologies (ICT) is becoming increasingly important to improve the economy of the world [1]. Wireless communication networks are perhaps the most critical element in the global ICT strategy, underpinning many other industries. It is one of the fastest growing and most dynamic sectors in the world.
The European Mobile Observatory (EMO) reported that the mobile communication sector had total revenue of €174 billion in 2010, there- by bypassing the aerospace and pharmaceutical sectors [2]. The development of wireless technologies has greatly improved people’s ability to communicate and live in both business operations and social functions.
The phenomenal success of wireless mobile communications is mirrored by a rapid pace of technology innovation. From the second generation (2G) mobile communication system debuted in 1991 to the 3G system first launched in 2001, the wireless mobile network has transformed from a pure telephony system to a network that can transport rich multimedia contents. The 4G wireless systems were designed to fulfill the requirements of International Mobile Telecommunications-Advanced (IMT-A) using IP for all services [3]. In 4G systems, an advanced radio interface is used with orthogonal frequency-division multiplexing (OFDM), multiple-input multiple-output (MIMO), and link adaptation technologies. 4G wireless networks can support data rates of up to 1 Gb/s for low mobility, such as nomadic/local wireless access, and up to 100 Mb/s for high mobility, such as mobile access. Long-Term Evolution (LTE) and its extension, LTE-Advanced systems, as practical 4G systems, have recently been deployed or soon will be deployed around the globe.
However, there is still a dramatic increase in the number of users who subscribe to mobile broadband systems every year. More and more people crave faster Internet access on the move, trendier mobiles, and, in general, instant com- munication with others or access to information. More powerful smart phones and laptops are becoming more popular nowadays, demanding advanced multimedia capabilities. This has resulted in an explosion of wireless mobile devices and services. The EMO pointed out that there has been a 92 percent growth in mobile broadband per year since 2006 [2]. It has been predicted by the Wireless World Research Forum (WWRF) that 7 trillion wireless devices will serve 7 billion people by 2017; that is, the number of network-connected wireless devices will reach 1000 times the world’s population [4]. As more and more devices go wireless, many research challenges need to be addressed.
In this presentation the effect of channel estimation errors on the energy efficiency of a down-link massive multiple-input multiple-output system is investigated and analyzed. The required down-link transmit power of the zero forcing (ZF) and maximum ratio transmission (MRT) precoding schemes are derived and analyzed under imperfect channel state information condition.
Oliver Holland - IEEE VTS UKRI - Energy efficiency challenges of data volume...Keith Nolan
Oliver Holland from King's College London talks about energy efficiency challenges of data volume increases and the use of sleep modes facilitated by opportunistic cognitive radio networking as a solution
Optimization Modeling and Decision Support for Wireless Infrastructure Deploy...streamspotter
Michael R. Bartolacci, Albena Mihovska, and Dilek Ozceylan on "Optimization Modeling and Decision Support for Wireless Infrastructure Deployment in Disaster Planning and Management" at ISCRAM 2013 in Baden-Baden.
10th International Conference on Information Systems for Crisis Response and Management
12-15 May 2013, Baden-Baden, Germany
Causes of Fiber Cut and the Recommendation to Solve the ProblemIOSRJECE
Optical fiber technology has transformed the telecom landscape in Ghana in recent years owing to its overwhelming advantages over the traditional transmission medium. Though the technology is highly immune to electromagnetic wave, it also offers a higher capacity of bandwidth for data and voice activities. The fiber infrastructure in Ghana has experienced a lot of fiber cuts incidences. And this has affected network quality delivery, increased operational expenditure and decline revenue margins of the telcos. This research was carried out in two phases using MTN Ghana (Western and Central Region) as a case study, to establish the root causes and remedial actions to curb it. First, Pareto and Ishakawa analytical tools were applied to the primary source data for the analysis. Secondly, a purposive survey was administered to acquire additional information. It was established that activities of government sponsored projects and private developers were largely responsible for the menace due to; negligence, ignorance, lack of coordination etc. On the bases, it’s recommended that telcos and stakeholders embark on educational campaign to sensitize the public on optical fiber cables whiles the government of Ghana put in measures to build mandatory right-of-way with support from the private sector.
Telecommunication Systems: How is Technology Change Creating New Opportunitie...Jeffrey Funk
These slides discuss how improvements in the data rates of wireline and wireless systems have and continue to occur. For wireline systems, these improvements are driven by the use of better glass fiber, lasers, amplifiers, and wavelength division multiplexing and there appears to be few limits to these improvements. For wireless systems, these improvements are primarily driven by the use of better ICs. As long as these improvements in ICs continue to occur, improvements in data rates along with improvements in the use of the frequency spectrum continue to be possible. Improvements in both wireless and wireline systems will also make new forms of Internet content possible. Furthermore, these improvements in ICs along with the improvements in MEMS that are discussed in a related set of slides are gradually making cognitive radio economically feasible. All of these improvements are creating various kinds of entrepreneurial opportunities. These slides are based on a forthcoming book entitled “Technology Change and the Rise of New Industries and they are the sixth session in a course entitled “Analyzing Hi-Tech Opportunities.”
What is VLC
Visible light & Spectrum
VLC process
-Transmitter
-Receiver
-Modulation
VLC characteristics
Comparison with RF & IR
Demerits of VLC
Applications
Why Fiber Optics Should be Preferred for Internet Connectionmecarlhooper
Nowadays, people are looking for better ways to enhance their internet connectivity for faster speed and reliable connection. One of the most sought-after internet connection mediums is the use of fiber optics or fiber optical cable. The fiber optical cables have brought a revolution in the world of internet connectivity. There are many advantages of using fiber optics. Go through the slide to know why fiber optics should be preferred for internet connection.
Presentation at ITU Workshop on "ICT Innovations in Emerging Economies", OFDM...Mohamed Siala
Presentation on transmit and receive waveforms optimization for future 5G cellular communication systems at the ITU Workshop on "ICT Innovations in Emerging Economies", Geneva, Switzerland, 18 September 2013, entitled "OFDMA with Optimized Transmit and Receive Waveforms for Better Interference Immune Communications in Next Generation Radio Mobile Communication Systems."
The innovative and effective use of information and communication technologies (ICT) is becoming increasingly important to improve the economy of the world [1]. Wireless communication networks are perhaps the most critical element in the global ICT strategy, underpinning many other industries. It is one of the fastest growing and most dynamic sectors in the world.
The European Mobile Observatory (EMO) reported that the mobile communication sector had total revenue of €174 billion in 2010, there- by bypassing the aerospace and pharmaceutical sectors [2]. The development of wireless technologies has greatly improved people’s ability to communicate and live in both business operations and social functions.
The phenomenal success of wireless mobile communications is mirrored by a rapid pace of technology innovation. From the second generation (2G) mobile communication system debuted in 1991 to the 3G system first launched in 2001, the wireless mobile network has transformed from a pure telephony system to a network that can transport rich multimedia contents. The 4G wireless systems were designed to fulfill the requirements of International Mobile Telecommunications-Advanced (IMT-A) using IP for all services [3]. In 4G systems, an advanced radio interface is used with orthogonal frequency-division multiplexing (OFDM), multiple-input multiple-output (MIMO), and link adaptation technologies. 4G wireless networks can support data rates of up to 1 Gb/s for low mobility, such as nomadic/local wireless access, and up to 100 Mb/s for high mobility, such as mobile access. Long-Term Evolution (LTE) and its extension, LTE-Advanced systems, as practical 4G systems, have recently been deployed or soon will be deployed around the globe.
However, there is still a dramatic increase in the number of users who subscribe to mobile broadband systems every year. More and more people crave faster Internet access on the move, trendier mobiles, and, in general, instant com- munication with others or access to information. More powerful smart phones and laptops are becoming more popular nowadays, demanding advanced multimedia capabilities. This has resulted in an explosion of wireless mobile devices and services. The EMO pointed out that there has been a 92 percent growth in mobile broadband per year since 2006 [2]. It has been predicted by the Wireless World Research Forum (WWRF) that 7 trillion wireless devices will serve 7 billion people by 2017; that is, the number of network-connected wireless devices will reach 1000 times the world’s population [4]. As more and more devices go wireless, many research challenges need to be addressed.
In this presentation the effect of channel estimation errors on the energy efficiency of a down-link massive multiple-input multiple-output system is investigated and analyzed. The required down-link transmit power of the zero forcing (ZF) and maximum ratio transmission (MRT) precoding schemes are derived and analyzed under imperfect channel state information condition.
Oliver Holland - IEEE VTS UKRI - Energy efficiency challenges of data volume...Keith Nolan
Oliver Holland from King's College London talks about energy efficiency challenges of data volume increases and the use of sleep modes facilitated by opportunistic cognitive radio networking as a solution
Keith Nolan - Use Of Cognitive Radio To Improve Spectrum Usage Efficiency And...Keith Nolan
Keith Nolan - spectrum, regulatory, technical and market issues surrounding the use of cognitive radio to improve spectrum usage efficiency and data capacity, IEEE VTS UKRI meeting, July 2012, Dublin, Ireland
P LACEMENT O F E NERGY A WARE W IRELESS M ESH N ODES F OR E-L EARNING...IJCI JOURNAL
Energy efficiency solutions are more vital for Gree
n Mesh Network (GMN) campuses. Today students are
benefited using these e-learning methodologies. Ren
ewable energies such as solar, wind, hydro has
tremendous applications on energy efficient wireles
s networks for sustaining the ever growing traffic
demands. One of the major issues in designing a GMN
is minimizing the number of deployed mesh routers
and gateways and satisfying the sustainable QOS bas
ed energy constraints. During low traffic periods t
he
mesh routers are switched to power save or sleep mo
de. In this paper we have mathematically formulated
a
single objective function with multi constraints to
optimize the energy. The objective is to place min
imum
number of Mesh routers and gateways in a set of can
didate location. The mesh nodes are powered using
the solar energy to meet the traffic demands. Two g
lobal optimisation algorithms are compared in this
paper to optimize the energy sustainability, to gua
rantee seamless connectivity
Downlink massive full dimension-multiple input multiple output downlink beam...IJECEIAES
The long-term evolution and advancement (LTE-A) of the 5G wireless network depends critically on energy consumption. Many existing solutions focus on limiting power constraints and consequently system coverage. So, improving the antenna array elements of the base station (BS) can solve this issue. In this paper, introduce a coordinated ON-OFF switching method in the massive full dimensional multiple input multiple output (massive-FD-MIMO) system. It enhances the radiation pattern of the antenna array element by adjusting the angular power spectra at the BS. By the way, it allows to select the minimum number of antennas for effective beamforming toward specific user equipment’s (UEs). In this context, part of antenna element should be active mode and remining should be sleep mode at the time of signal beamforming. The multipath spatial profiles are decided the beamforming frequency band with minimize energy consumption. As part of the method, we used a conjugated beamforming with power optimization scheme to determine the individual antenna potential and fading channel condition, power optimization is performed. This method quality of service, reliability, energy consumption and data rate can all be evaluated by experimenting with different-sized antenna arrays such as 16×16, 32×32, 64×64 and 128×128.
Recent many works have concentrated on
dynamically turning on/off some base stations (BSs) in order to
improve energy efficiency in radio access networks (RANs). In
this survey, we broaden the research over BS switching
operations, which should competition up with traffic load
variations. The proposed method formulate the traffic variations
as a Markov decision process which should differ from dynamic
traffic loads which are still quite challenging to precisely forecast.
A reinforcement learning framework based BS switching
operation scheme was designed in order to minimize the energy
consumption of RANs. Furthermore a transfer actor-critic
algorithm (TACT) is used to speed up the ongoing learning
process, which utilizes the transferred learning expertise in
historical periods or neighboring regions. The proposed TACT
algorithm performs jumpstart and validates the feasibility of
significant energy efficiency increment.
PSO-CCO_MIMO-SA: A particle swarm optimization based channel capacity optimza...IJECEIAES
With the radio channels physical limits, achieving higher data rate in the multi-channel systems is been a biggest concern. Hence, various spatial domain techniques have been introduced by incorporating array of antenna elements (i.e., smart antenna) in recent past for the channel limit expansion in mobile communication antennas. These smart antennas help to yield the improved array gain or bearm forming gain and hence by power efficiency enhanmaent in the channel and antenna range expansion. The use of smart antenna leads to spatial diversity and minimizes the fading effect and improves link reliability. However, in the process of antenna design, the proper channel modelling is is biggest concern which affect the wireless system performance. The recent works of MIMO design systems have discussed the issues in number of antenna selection which suggests that optimization of MIMO channel capacity is required. Hence, a Particle Swarm Optimization based channel capacity optimzation for MIMO system incorporated with smart antenna is introduced in this paper. From the outcomes it is been found that the proposed PSO based MIMO system achieves better convergenece speed which results in better channel capacity.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
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Major cyber events in 2024
Malware and malicious payload trends
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Cyber risk predictions
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https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
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Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
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Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
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Generating a custom Ruby SDK for your web service or Rails API using Smithy
Ieee vts talk
1. IEEE VTS UKRI Meeting – EW2013
Toward Energy Efficient 5G
Networks
Mehrdad Dianati
Centre for Communication Systems Research (CCSR)
U i it f SUniversity of Surrey
2. Agendag
• Background/Motivations
• Key research areas that will affect energy
efficiency of the future networks.efficiency of the future networks.
Energy efficiency research in CCSR• Energy efficiency research in CCSR
– Past and current projects
– Highlights of the results
3. Growing Demand for PerformanceG g d
??
• Demand seems to be ever-increasing (exponentially) ….
4. Why energy efficiency is important?
Care for the planet and the “network
operator’s wallet”operator s wallet
Electricity bill is a notable part of
operational expenditure of mobile
operators
Increasing energy cost trends
5. Dividing Energy Consumption of
Access Networks
Gateway
(PDG GGSN)
Base Station
Network Server
(SGSN, HLR)
Internet
Access NetworkMobile Core Network
(PDG, GGSN)
Media Server (IMS)
70-80% 2-10%10-20%Energy Consumption
(CO2-contribution)( 2 )
CCSR’s main focus
6. Energy and Spectrum Efficiency trade-offgy d Sp y d
Energy
Effi iEfficiency
Spectral
Efficiency?Efficiency?
7. The trade-off (point to point
communication)
Technology
Potential
communication)
dataper
Potential
M th
usefuld
ergy)
Limit for Energy Efficiency
Move there
ciency(u
nitofen
Limit for Energy Efficiency
Possible Improvement?
rgyEffic
un
Possible Improvement?
Ener
A desired performance metric (say
Current Operation
Baseline
A desired performance metric (say
Spectral Efficiency or QoE)
8. Towards Green Networks (1/4)
Deployment
• Deployment scenarios:
optimum cell sizes
Deployment
optimum mix of cell sizes
hierarchical deployments
multi-RAT deploymentsoverlay macro cell
small
cells
relays
EE topology
9. Towards Green Networks (2/4)
• Management algorithms:Management • Management algorithms:
capacity management
multi RAT coordination
Management
multi-RAT coordination
base station sleep mode
t l d iprotocol design
multi-RAT
Zzz
EE adaptive cov./cap.p p
10. Towards Green Networks (3/4)
• RRM algorithms:
RRM
• RRM algorithms:
cooperative scheduling
i t f di tiinterference coordination
joint power allocation and
resource allocationresource allocation
EE j i t RRMEE joint RRM
11. Towards Green Networks (4/4)
• Disruptive approaches:
New Architecture
• Disruptive approaches:
multi-hop transmission
d h t kad-hoc networks
terminal-terminal-
transmission (virtual MIMO)transmission (virtual-MIMO)
cooperative multipoint arch.
EE adaptive backhauling
Adaptive
backhaul
EE adaptive backhauling
cognitive/opportunistic
radios & networksm lti hop radios & networksmulti-hop
Future EE architectures
12. Energy Efficiency Research
in CCSR
• CCSR has been one of the pioneers of EE
research:
– MVCE Green Radio
– EU-FP7 EARTH Projectj
– Huawei Green Comms. Projectj
13. Huawei Green Comms Project
• Funded by Huawei Technologies
• Work areas:
– Fundamental aspects of energy efficiency inFundamental aspects of energy efficiency in
communication systems
– Massive MIMO for energy efficient communicationsgy
– Energy efficient RRM
– CoMP techniques for energy efficiencyCoMP techniques for energy efficiency
– Multi-RAT solutions
14. IEEE VTS UKRI Meeting – EW2013
Energy Efficient Adaptive CoMP
Clustering for LTE-A Systems
Efstathios Katranaras,
M. A. Imran, M. Dianati
C t f C i ti S t R hCentre for Communication Systems Research
University of Surrey
15. Background & Problem Overview
• The aim is to coordinate Inter-cell interference (ICI)( )
• The approach is Coordinated Multi Point Joint Transmission (CoMP-JT)
• In practice, only clustered CoMP deployments are feasible due to the
signalling overheadsignalling overhead
• The existing studies mostly consider static clustering schemes
• We study adaptive clustering for LTE-A systems.
16. Basic Idea
Dynamically adjust the size and the configuration ofDynamically adjust the size and the configuration of
the clusters. The clustering is adapted according to
the network load and other propagation factors.
17. Main Results (1)Main Results (1)
Comparing clustering schemes in terms of achieved average EE per UE for
various UEs-snapshots.p
Algorithms based on the proposed framework are robust to the changes of the
physical environmentphysical environment.
18. Main Results (2)Main Results (2)
CDF of per-UE EE for various clustering schemes.
No significant EE degradation for all UEs = Minimising energy waste for UEs
th t i i ifi t i d t tithat experience no significant gain due to cooperation
19. Main Results (3)Main Results (3)
Average EE per cell for various clustering schemes.
20. IEEE VTS UKRI Meeting – EW2013
EE Analysis and Optimization of
Virtual-MIMO Systems
Jing Jiang,
M. Dianati, M. A. Imran
C t f C i ti S t R hCentre for Communication Systems Research
University of Surrey
21. EE Analysis and Optimization of
Virtual-MIMO Systemsy
• Main Contributions:
– An upper bound for EE as a function of SE
– Optimal power allocation, bandwidth
ll ti b f t it t dallocation, number of transmit antennas, and
cooperating nodes.
22. EE Analysis and Optimization of
Virtual-MIMO Systems
0 45
0.5
0.45
0.5
Virtual MIMO Systems
0.35
0.4
0.45
oule)
0.35
0.4
0.45
oule)
Bandwidth
Senario II
Bandwidth
Senario I
0.25
0.3
iency(MBits/Jo
0.25
0.3
ciency(MBits/J
0.15
0.2
EnergyEffic
MIMO (Upper Bound)
Virtual MIMO with CF
(Upper Bound)
Virtual MIMO with CF
0.15
0.2
EnergyEffic
MIMO (Upper Bound)
MIMO (Simulations)
Virtual MIMO with CF
(U B d)
0.05
0.1
Virtual MIMO with CF
(Simulations)
Virtual MIMO with AF
(Upper Bound)
Virtual MIMO with AF
(Simulations)
0.05
0.1
(Upper Bound)
Virtual MIMO with CF
(Simulations)
MISO (Upper Bound)
MISO (Simulations)
0 5 10 15 20
0
Spectral Efficiency (bits/s/Hz)
(b)
0 5 10 15 20
Spectral Efficiency (bits/s/Hz)
(a)
EE performance of the 2-by-2 virtual-MIMO system with G=10dB
(Bandwidth scenario I is considered in (a) and Bandwidth(Bandwidth scenario I is considered in (a) and Bandwidth
scenario II is in (b) )
23. EE Analysis and Optimization of
Virtual-MIMO Systemsy
• Main Conclusions:
Th lt d t t th t h SE i l EE i– The results demonstrates that when SE is low, EE is
dominated by the load-independent circuit power.
– As SE increases, transmit power contributes more to
the EE performancethe EE performance.
Compared to the ideal MIMO system virtual MIMO– Compared to the ideal MIMO system, virtual-MIMO
system requires more energy for the cooperation, but
outperforms the non-cooperative MISO.p p
24. IEEE VTS UKRI Meeting – EW2013
B ff A d E Effi i tBuffer Aware and Energy Efficient
Scheduling of Real Time Traffic for OFDMA
Systems
Inventors: M. Dianati, M. Sabagh
Co-Inventors: M. A. Imran, R. Tafazolli
Centre for Communication Systems Research
University of SurreyUniversity of Surrey
25. Background & Prior Techniques
• The existing scheduling scheme are designed toThe existing scheduling scheme are designed to
optimise spectral efficiency for operators and maintain
QoS for users (see attached document).
• The aim is to propose energy efficient packet scheduling
for real time traffic in OFDMA systems.
Page 25
32. IEEE VTS UKRI Meeting – EW2013
I t f S ti l C l ti EE fImpacts of Spatial Correlation on EE of
massive-MIMO Systemsy
Jing Jiang,
M. Dianati, M. A. Imran
C t f C i ti S t R hCentre for Communication Systems Research
University of Surrey
34. Results and Discussion
EE simulations and UBs for Rayleigh-fading MIMO channels
(Constant spatial correlation with φt = φr = 0.5 is considered in
(a), and the results for i.i.d. fading channels are in (b).)
Page 34
35. Results and Discussion
The relation between EE and SE for exponentially correlated
MIMO channels and φ = φ = 0 5 (The effects of loadMIMO channels and φt = φr = 0.5 (The effects of load-
independent circuit power on EE are also shown.)
Page 35
36. Simulation Results and Discussion
The EE performance as a function of coefficient φ (where φt
=φ =φ) for both constant and exponential correlated Rayleigh=φr=φ) for both constant and exponential correlated Rayleigh-
fading MIMO channels at RM = 20 bits/s/Hz.
Page 36
37. Th k YThank You
Dr Mehrdad DianatiDr. Mehrdad Dianati
m.dianati@surrey.ac.uk
Acknowledgement: Dr. M. A. Imran, Dr. E. Katranars, Dr. J. Jiang,
Mr. M. Sabagh, and Dr. Amir Akbari have contributed to the
technical work and the preparation of the slidestechnical work and the preparation of the slides
CONFIDENTIAL, EARTH Project.