An efficient Relay Station deployment method for multi-hop networks
01 Nov 2016-pp 1-5
TL;DR: A cost efficient Relay Station (RS) deployment using cost based RS placement (CRP) approach is proposed and the simulation results shows that CRP approach is a cost efficient approach.
Abstract: In wireless communication system, coverage area, transmission quality, signal strength are affected by shadowing, wireless interference, white Gaussian noise etc. This problems can be avoided by deploying more number of eNBs in geographical area, but it will increase deployment cost. In this paper a cost efficient Relay Station (RS) deployment using cost based RS placement (CRP) approach is proposed. After deploying the RSs, average received power by users are also calculated in the paper. The five parameters such as Transmission Signal Strength index (TSSI), RS placement Price index (RPPI), Area covered for service with population (ACS_P) and without population (ACS) and interference index (II) are calculated for deployment of RSs. The simulation results shows that CRP approach is a cost efficient approach.
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TL;DR: A brief survey of methods to improve the power efficiency of cellular networks, explore some research issues and challenges and suggest some techniques to enable an energy efficient or "green" cellular network.
Abstract: Energy efficiency in cellular networks is a growing concern for cellular operators to not only maintain profitability, but also to reduce the overall environment effects. This emerging trend of achieving energy efficiency in cellular networks is motivating the standardization authorities and network operators to continuously explore future technologies in order to bring improvements in the entire network infrastructure. In this article, we present a brief survey of methods to improve the power efficiency of cellular networks, explore some research issues and challenges and suggest some techniques to enable an energy efficient or "green" cellular network. Since base stations consume a maximum portion of the total energy used in a cellular system, we will first provide a comprehensive survey on techniques to obtain energy savings in base stations. Next, we discuss how heterogenous network deployment based on micro, pico and femtocells can be used to achieve this goal. Since cognitive radio and cooperative relaying are undisputed future technologies in this regard, we propose a research vision to make these technologies more energy efficient. Lastly, we explore some broader perspectives in realizing a "green" cellular network technology.
1,163 citations
"An efficient Relay Station deployme..." refers methods in this paper
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TL;DR: An optimization framework is developed to maximize the capacity as well as to meet the minimal traffic demand by each subscriber station (SS) and to avoid exponential computation time, a heuristic algorithm is proposed to efficiently solve the formulated problem.
Abstract: To satisfy the stringent requirement of capacity enhancement in wireless networks, cooperative relaying is envisioned as one of the most effective solutions. In this paper, we study the capacity enhancement problem by way of relay stations (RSs) placement to achieve an efficient and scalable design in broadband wireless access networks. To fully exploit the performance benefits of cooperative relaying, we develop an optimization framework to maximize the capacity as well as to meet the minimal traffic demand by each subscriber station (SS). In specific, the problem of joint RS placement and bandwidth allocation is formulated into a mixed-integer nonlinear program. We reformulate it into an integer linear program which is solvable by CPLEX. To avoid exponential computation time, a heuristic algorithm is proposed to efficiently solve the formulated problem. Numerical analysis is conducted through case studies to demonstrate the performance gain of cooperative relaying and the comparison between the proposed heuristic algorithm against the optimal solutions.
91 citations
19 May 2008
TL;DR: A general framework for solving the minimum cost RS placement problem in 802.16J Mobile Multi-hop Relay (MMR) networks is provided and it is demonstrated that the most significant advantages of the dual-relay architecture lie in the ability of achieving high throughput for the systems.
Abstract: Cooperative relaying is one of the most effective techniques in coverage extension and capacity enhancement by virtue of spatial diversity. To fully explore the benefits of adopting relay stations (RSs), a vital issue is the placement of RSs by jointly considering an advanced coding scheme. In this paper, we aim to provide a general framework for solving the minimum cost RS placement problem in 802.16J Mobile Multi-hop Relay (MMR) networks. We first introduce a novel dual-relay architecture, where all the users, i.e., the mobile stations (MSs) and the fixed subscriber stations (SSs), are connected to the BS via two active RSs through decoded-and-forwarding scheme. We will then demonstrate that the most significant advantages of the dual-relay architecture lie in the ability of achieving high throughput for the systems. In addition, the users can be subject to better fault tolerance, robustness, and power saving. We formulate the dual- relay RS placement problem, and solve it through a two-phase algorithm to deal with the NP-hardness. Numerical analysis is conducted to evaluate the performance gain due to cooperative RS placement in the proposed framework, and demonstrate that the proposed approach can lead to a well acceptable solution compared with that by exhaustively searching.
79 citations
Additional excerpts
...In [3], the author considered cooperative relaying....
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Dissertation•
31 Aug 2012
TL;DR: In this article, the authors proposed a mixed integer programming (MILP) formulation for the crucial task of relay placement in a broadband wireless access network, which is achieved by optimal placement of relay stations (RSs) along with the presence of a base station (BS) and multiple Candidate Positions (CPs).
Abstract: With the development of IEEE 802.16j multihop relay protocol, the requirement to enhance the network capacity in a wireless network has been met effectively. In this thesis, we study the capacity enhancement problem for a broadband wireless access network which is achieved by optimal placement of Relay Stations (RSs) along with the presence of a Base Station (BS) and multiple Candidate Positions (CPs). We present a mixed integer programming formulation for the crucial task of RS placement. Weighted objective is also explored to include preferential RS placement. The proposed formulations are solved in a matter of seconds. It is observed that with preferential RS placement, the same demand can be met with 73% fewer RSs with a slight, 6%, decrease in the overall network capacity. Moving forward, the objective is broadened to combine and include joint BS and RS placements for a given network. This model formulation provides better overall capacity than combined capacities of RS placement formulations. Maximin objective is introduced to distribute the excess bandwidth to all subscriber stations (SS) rather than assigning it to only one SS. With this approach, bandwidth allocated to each SS is increases by an average of 35.18%.
70 citations
"An efficient Relay Station deployme..." refers background in this paper
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01 Mar 2007
TL;DR: This paper addresses the design, analysis and system performance of a WiMax (worldwide interoperability for microwave access) which is developed in the greater region of Athens and suggests a GIS system to explore aspects in network planning additional with the use of a suitable software palling tool.
Abstract: This paper addresses the design, analysis and system performance of a WiMax (worldwide interoperability for microwave access) which is developed in the greater region of Athens. It is based on PMP (point to multipoint) and provides broadband wireless services in fixed locations. As the radio communications systems are easy and fast deployment comparing to wire-line, the proposed system will increase the broadband penetration in Athens. Because of the variform terrain morphology it is essential to use a GIS (geographic information system) to explore aspects in network planning additional with the use of a suitable software palling tool. Throughput measurements were performed on an experimental WiMax base station, in order to verify its performance.
39 citations
"An efficient Relay Station deployme..." refers methods in this paper
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