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Real-time deployment of multihop relays for range extension

Michael R. Souryal, Johannes Geissbuehler, Leonard E. Miller, Nader Moayeri
2007 Proceedings of the 5th international conference on Mobile systems, applications and services - MobiSys '07  
This paper targets the need in certain scenarios for rapid deployment of these relays when little or nothing is known in advance about a given environment and its propagation characteristics.  ...  The common element motivating this work is the need to maintain communications in an environment where single-hop communication is typically inadequate.  ...  In memory of our colleague and friend, Leonard E. Miller .  ... 
doi:10.1145/1247660.1247673 dblp:conf/mobisys/SouryalGMM07 fatcat:bzpuchlbwjbibczb2swrs4kbge

Optimizing Power and Mitigating Interference in LTE-A Cellular Networks through Optimum Relay Location

Jaafar A. Aldhaibani, A. Yahya, R. B. Ahmad
2014 Elektronika ir Elektrotechnika  
1 Abstract-In this paper, we propose new scheme for an optimum location for Relay Node (RN) in LTE-A cellular network to enhance the capacity at cell edge based on modified Shannon capacity for LTE networks  ...  The proposed approach mitigates interferences between the nodes and ensures optimum utilization of transmitted power.  ...  OPTIMUM RELAY LOCATIONIn this section, the issue of the optimum placement of the relay node deployment in a dual-hop network over LTE-A cellular networks will be addressed as well as the maximum throughput  ... 
doi:10.5755/j01.eee.20.7.3379 fatcat:u642vkvcgjfanj5o5xsjlyc3au

Cooperative diversity in the presence of impulsive noise

Suhail Al-Dharrab, Murat Uysal
2009 IEEE Transactions on Wireless Communications  
An extensive Monte Carlo simulation is also presented to illustrate the performance of cooperative schemes in various impulsive environments.  ...  In this paper, we investigate the performance of cooperative communication over Rayleigh fading channels in the presence of impulsive noise modeled by Middleton Class A noise.  ...  An extensive Monte Carlo simulation is also presented to illustrate the performance of cooperative schemes in various impulsive environments.  ... 
doi:10.1109/twc.2009.081290 fatcat:x3xfogazqfdbtovy3l5jcihdri

On the Use of Nomadic Relaying for Emergency Telemedicine Services in Indoor Environments [chapter]

Inam Ullah, Zhong Zheng, Edward Mutafungwa, Jyri Hämäläinen
2013 Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering  
In a significant proportion of recorded cases, these medical emergencies would tend to occur in indoor locations.  ...  This paper analyzes the use of nomadic relays that could be temporarily deployed close to a building as part of the medical emergency response.  ...  This work was prepared in HEWINETS project framework, and was supported in part by the Finnish Funding Agency for Technology and Innovation (TEKES), Cassidian and Ericsson Finland.  ... 
doi:10.1007/978-3-642-37893-5_7 fatcat:fpohh6i5dzelfg6kusjl2jli6a

The use of intelligently deployed fixed relays to improve the performance of a UTRA-TDD system

E.K. Tameh, A. Nix, A. Molina
2003 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484)  
Simulations are carried out in a microcellular environment using propagation data from a site-specific model and an optimisation algorithm to determine the locations of base stations (BSs) and relay nodes  ...  In this study, the benefits of intelligent relaying in the form of enhanced capacity and/or coverage and reduced RF emissions relative to a traditional cellular network are quantified.  ...  Using a site deployment optimisation algorithm together with a site-specific propagation modelling tool, a number of BSs and fixed relay units were deployed in an urban microcellular environment.  ... 
doi:10.1109/vetecf.2003.1285353 fatcat:rvddpxfyzfacne2oivynlvppcq

Enforcing High-Performance Operation of Multi-hop Wireless Networks with MIMO Relays

Shan Chu, Xin Wang, Minming Li
2012 2012 IEEE 32nd International Conference on Distributed Computing Systems  
nodes as relays to assist weak links in wireless networks, with the aim of reducing the number of relay nodes and providing performance provisioning.  ...  We identify the specific constraints of MIMO relay nodes for assisting weak links, and take advantage of the MIMO ability to flexibly select among different transmission strategies.  ...  As discussed in Section I, simply increasing the number of single-antenna relays cannot substitute MIMO relays due to interference.  ... 
doi:10.1109/icdcs.2012.60 dblp:conf/icdcs/ChuWL12 fatcat:fxkr77gthnbqdgmcdhovyvct7y

Prioritized User Association for Sum-Rate Maximization in UAV-Assisted Emergency Communication: A Reinforcement Learning Approach

Abdul Basit Siddiqui, Iraj Aqeel, Ahmed Alkhayyat, Umer Javed, Zeeshan Kaleem
2022 Drones  
Unmanned air vehicles (UAVs) used as aerial base stations (ABSs) can provide communication services in areas where cellular network is not functional due to a calamity.  ...  In this paper, a reinforcement learning framework is proposed to maximize the number of served users by optimizing the ABS 3D location and power.  ...  a UAV to maximize coverage and minimizing outage probability Decode and forward-relaying method Maximum coverage with minimum outage was obtained by finding the optimum height of a UAV [17] A 3D deployment  ... 
doi:10.3390/drones6020045 fatcat:anep5ecjg5bsnaeweny3fnyeqi

Analysing a Multi-hop UMTS over Multiple Frequency Schemes and an Urban Environment

Konstantios Konstantinou, Muhammad A. Imran, Costas Tzaras
2008 Journal of Networks  
In this paper we analyse the performance of a relay based UMTS system in an urban environment using multiple hops on multiple frequency bands.  ...  Two hop communication links over the uplink and downlink are operated at four non-overlapping spectrum bands in order to minimise interference. This results in several possible frequency schemes.  ...  ACKNOWLEDGMENT We thank Ch.Exec.Editor G.J.Sun, for his interest in our research and the reviewers for their valuable comments.  ... 
doi:10.4304/jnw.3.7.41-48 fatcat:hmhh5egbtjcoznhugwfug7awpa

Effect of relay location on two-way DF and AF relay for multi-user system in LTE-A cellular networks

Jaafar. A. Aldhaibani, A. Yahya, R.B. Ahmad, Normaliza Omar, Zaid G. Ali
2013 2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC)  
The performance of a multi-hop relay network at an optimum position as well as a proposed half-duplex mode with two scenarios is investigated.  ...  This paper investigates the position of a relay problem for the maximum capacity enhancement of a twoway Relay Node (RN) to achieve an efficient and scalable Long Term Evolution-Advanced (LTE-A) wireless  ...  However, this type of relay is employed in interference-limited environments.  ... 
doi:10.1109/beiac.2013.6560153 fatcat:qt44spzyhjgpbc67jaazkgekuy

Performance enhancement of relays used for next generation wireless communication networks

Saraju Prasad Padhy, Madhusmita Panda, Srinivas Sethi, Aruna Tripathy
2021 International Journal of Informatics and Communication Technology (IJ-ICT)  
Other promising features of this technology include easy to implement and reduction in deployment cost.  ...  Thus they are included in the design of next generation wireless communication systems to provide performance improvement in terms of coverage and capacity over their predecessors.  ...  This gives an idea about fixing of Relay nodes in the network to optmize the performance. ANALYSIS OF A & F RELAY UNDER IBL REGIME 4.1.  ... 
doi:10.11591/ijict.v10i1.pp27-36 fatcat:m25yodlhundv7bmg6rk4k4wv3u

Quality of Service Aware Multi-Hop Relay Networks for Green Radio Communication

M. Arthi, P. Arulmozhivarman, K. Vinoth Babu
2015 Journal of green engineering  
Multihop relay (MHR) network is the suitable alternate for eNB especially in the coverage holes and cell edges.  ...  In recent years, issues on greenhouse pollution and power consumption related to the operation of information communication technology (ICT) devices have triggered a huge amount of research work towards  ...  Green communication has pulled in a considerable measure of consideration because of rising electricity cost of general network operations and its unfriendly impact on environment due to CO 2 emissions  ... 
doi:10.13052/jge1904-4720.521 fatcat:lcvv3ifhznanji46mzyuaeficu

The road to IMT-advanced communication systems: State-of-the- art and innovation areas addressed by the WINNER + project

A. Osseiran, E. Hardouin, A. Gouraud, M. Boldi, I. Cosovic, K. Gosse, J. Luo, S. Redana, W. Mohr, J. Monserrat, T. Svensson, A. Tolli (+2 others)
2009 IEEE Communications Magazine  
ACKNOWLEDGMENTS This article was written in the framework of the CELTIC project CP5-026 WINNER+. The authors would like to acknowledge the contributions of their colleagues.  ...  In the emerging cellular-deployment concepts with multihop communications relayed by fixed or mobile entities (infrastructure-cooperative relaying, device-to-device communications, and cooperation), a  ...  The introduction of relays in cellular communication systems entails a large number of deployment options to be investigated; in particular the layout of a REC depends on the num- ber of hops, the number  ... 
doi:10.1109/mcom.2009.5116799 fatcat:rjhcq6ksdzck5ncirlhxmybuaa

Mesh technology enabling ubiquitous wireless networks

Guido R. Hiertz, Sebastian Max, Erik Weiß, Lars Berlemann, Dee Denteneer, Stefan Mangold
2006 Proceedings of the 2nd annual international workshop on Wireless internet - WICON '06  
Hence, rollout of high speed wireless networks is delayed until a solution is provided. Relay based deployment and Mesh topology for wireless networks helps to overcome the cost barrier.  ...  Therefore, supply of large areas with high speed connections demands dense installation of backbone connected devices. While Capital Expenditure (CAPEX) for hardware is low, deployment is expensive.  ...  According to specific deployment, environment and size of the Wireless Mesh Network (WMN), a single device is in reception range of a minor fraction of all Mesh devices.  ... 
doi:10.1145/1234161.1234168 dblp:conf/wicon/HiertzMWBDM06 fatcat:sqb5oyassjh6xodowya7vzo6pq

Technoeconomic Evaluation of Cooperative Relaying Transmission Techniques in OFDM Cellular Networks

Antolín Moral, Josep Vidal, Jorge Pérez, Adrián Agustín, Ninoslav Marina, Anders Høst-Madsen
2011 EURASIP Journal on Advances in Signal Processing  
We evaluate the costs in the deployment of a 4G relay-assisted network in the 2.6 GHz band following a technoeconomic methodology that departs from cell dimensioning based on spectral efficiency and outage  ...  Different decodeand-forward relaying protocols are considered in the analysis, assuming a certain traffic load evolution over a period of ten years, different geotypes, and a progressive deployment of  ...  This higher efficiency of relaying in coverage limited environments is in line with previously published works.  ... 
doi:10.1155/2011/507035 fatcat:mnn2s732cnfmtolhgg5jtkqly4

Considerations for improving the capacity and performance of AeroMACS

Robert J. Kerczewski, Behnam Kamali, Rafael D. Apaza, Jeffrey D. Wilson, Robert P. Dimond
2014 2014 IEEE Aerospace Conference  
This paper describes some concepts that may be applied to improve the future capacity of AeroMACS, with a particular emphasis on gains that can be derived from the addition of IEEE 802.16j multihop relays  ...  These initial deployments will support fixed applications.  ...  The use of a relay seems to be the optimum choice, particularly in light of the fact that a relay can be deployed in places with a LOS or a near-LOS link to the MRBS.  ... 
doi:10.1109/aero.2014.6836412 fatcat:fb7br2wmxjfzzngzzfg5rrkd24
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