Heterogeneous network in LTE-advanced system

Wan, Lei; Hai, Wu; Yu, Yi Yin; Fei, Zesong

doi:10.1109/iccs.2010.5686373

Cited by 23 publications

(12 citation statements)

References 3 publications

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“…CCD results in high interference among macro and low-power BSs so that the coverage of low-power BSs is reduced and their capacity gains are diminished if no interference management technique is deployed in the system. In [8], the authors explore the performance of OD and CCD with the assumption that the system uses the conventional association rule in which a user associates with the BS that provides the highest downlink signal power. The authors show, via simulation, that CCD achieves a higher average throughput when the channels are equally divided between the macro and pico BSs.…”

Section: Related Workmentioning

confidence: 99%

Joint Resource Allocation and User Association for Heterogeneous Wireless Cellular Networks

Fooladivanda

Rosenberg

2013

IEEE Trans. Wireless Commun.

312

210

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Abstract-We propose a unified static framework to study the interplay of user association and resource allocation in heterogeneous cellular networks. This framework allows us to compare the performance of three channel allocation strategies: Orthogonal deployment, Co-channel deployment, and Partially Shared deployment. We have formulated joint optimization problems that are non-convex integer programs, are NP-hard, and hence it is difficult to efficiently obtain exact solutions. We have, therefore, developed techniques to obtain upper bounds on the system's performance. We show that these upper bounds are tight by comparing them to feasible solutions. We have used these upper bounds as benchmarks to quantify how well different user association rules and resource allocation schemes perform. Our numerical results indicate that significant gains in throughput are achievable for heterogeneous networks if the right combination of user association and resource allocation is used. Noting the significant impact of the association rule on the performance, we propose a simple association rule that performs much better than all existing user association rules.

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Section: Related Workmentioning

confidence: 99%

Joint Resource Allocation and User Association for Heterogeneous Wireless Cellular Networks

Fooladivanda

Rosenberg

2013

IEEE Trans. Wireless Commun.

312

210

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“…Orthogonal frequency allocation between macro and pico BSs is assumed for inter-tier interference avoidance, where the ratio is to be optimized. In addition, other frequency allocation schemes, like co-channel sharing [3], can also be analyzed by our model. 978-1-4673-6050-0/13/$31.00 ©2013 IEEE Services with constant bandwidth demands are considered in this paper, which include applications like voice calls, video conference, realtime TV and so on.…”

Section: A Deployment Scenariomentioning

confidence: 99%

“…Actually, the problems about user association and frequency allocation have been intensely studied in the existing works [3]- [8]. Range Expansion (RE), an improved association method based on the conventional one, has been adopted in many studies.…”

Section: Introductionmentioning

confidence: 99%

Joint optimization of frequency allocation and user association with differentiated service in hyper-cellular networks

Zhang

Zhou

Niu

2013

2013 19th Asia-Pacific Conference on Communications (APCC)

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The existing architecture of heterogeneous networks is not energy and spectrum efficient as many lightly loaded base stations (BS) can not be turued off for coverage guarantee. To further improve energy and spectrum efficiency, a new architecture called "hyper-cellular" network has been proposed in our previous work. Under this architecture, the function of different types of BSs may not be the same, and the mechanism of user association should consider many factors, such as user mobility, traffic load distribution, and differentiated service demands, which are usually ignored inthe existing studies. In addition, the spectrum allocation strategy also has great influence on the network performance.As a starting point, we explore the user association mechanism based on the differentiated service demands of the network users, aud joiutly optimize it with spectrum allocatiou, in order to maximize the network capacity with quality of service constraints. Although closed-form expression of the optimal solution can not be derived, numerical results are obtained.Our approach is shown to improve the network capacity more than four times over the baseline strategy, where the conventional user association method is adopted and all BSs use all available spectrum.

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“…6. For details and a more comprehensive introduction of HetNet, readers may refer to [92][93][94][95][96][97][98]. More specifically, studies on different aspects of the Pico and Femto cell deployments in LTE-Advanced networks can be found in [99][100][101][102][103][104][105] and [106][107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122][123][124] respectively.…”

Section: Overviewmentioning

confidence: 99%

LTE-Advanced Radio Access Enhancements: A Survey

Dehghani

Arshad

MacKenzie

2014

Wireless Pers Commun

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Long Term Evolution Advanced (LTE-Advanced) is the next step in LTE evolution and allows operators to improve network performance and service capabilities through smooth deployment of new techniques and technologies. LTE-Advanced uses some new features on top of the existing LTE standards to provide better user experience and higher throughputs. Some of the most significant features introduced in LTE-Advanced are carrier aggregation, enhancements in heterogeneous networks, coordinated multipoint transmission and reception, enhanced Multiple Input Multiple Output (MIMO) usage and deployment of relay nodes in the radio network. Mentioned features are mainly aimed to enhance the radio access part of the cellular networks. This survey article presents an overview of the key radio access features and functionalities of the LTE-Advanced radio access network, supported by the simulation results. We also provide a detailed review of the literature together with a very rich list of the references for each of the features. An LTE-Advanced roadmap and the latest updates and trends in LTE markets are also presented.

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Heterogeneous network in LTE-advanced system

Cited by 23 publications

References 3 publications

Joint Resource Allocation and User Association for Heterogeneous Wireless Cellular Networks

Joint Resource Allocation and User Association for Heterogeneous Wireless Cellular Networks

Joint optimization of frequency allocation and user association with differentiated service in hyper-cellular networks

LTE-Advanced Radio Access Enhancements: A Survey

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