High-Capacity OFDMA Femtocells by Directional Antennas and Location Awareness

Tsai, Ang-Hsun; Wang, Lichun; Huang, Jane-Hwa; Hwang, Ruey-Bing

doi:10.1109/jsyst.2011.2178724

Cited by 16 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Constraint (6) indicates vacant spectrum allocation to ensure the rationality of the auction; constraint (7) ensures incentive compatibility, that is, ''truthfulness''; constraint (8) indicates that each small cell is allocated at most one spectrum band and that two conflicting small cells cannot get the same spectrum band; constraint (9) indicates that each small cell can only access one spectrum band at a time.…”

Section: Auction Modelmentioning

confidence: 99%

“…[4][5][6] Deployment of small-cell base stations has a great capability to improve the spatial reuse of spectrum resources and also enhance transmit power efficiency. 7,8 Small cells can be deployed both with macro-cell coverage and stand alone, both indoor and outdoor, sparsely or densely, and support both ideal and non-ideal backhauls. Small cells can be deployed by either operators or independent mobile users such as an organization in an office building.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A multi-greedy spectrum auction algorithm for cognitive small cell networks

Zhao

Liu

Chen

2017

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

Cognitive small cell networks consisting of macro-and small cells are foreseen as a candidate solution to meet ever increasing requirements of broadband services and new applications. However, the traditional fixed spectrum allocation policy makes available spectrum resources for small cells insufficient. Therefore, an efficient spectrum allocation method is urgently needed that allows a large number of small cells to share spectrum resources with macro-cells. In this article, a real-time spectrum auction model is presented which aims at assigning the scarce spectrum resources to small cells quickly. The co-win situation is constructed, and the trade-off between spectrum utilization and revenues is controlled. Such a problem is formulated as an NP-hard optimization problem for which a low-complexity multi-greedy algorithm is proposed to obtain prices and spectrum allocations. The proposed algorithm can achieve conflict-free spectrum allocations that maximize the utility and spectrum allocation efficiency. Compared with the Vickrey-Clarke-Groves algorithm, simulation results show the higher utility and spectrum allocation efficiency of the proposed algorithm.

show abstract

Section: Auction Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A multi-greedy spectrum auction algorithm for cognitive small cell networks

Zhao

Liu

Chen

2017

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

show abstract

“…Inside the femtocell, the available space is limited for antenna patterns. Only few antenna types are possible for femtocell operation, for example, planner inverted F antenna, microstrip antenna, and wire antenna [7][8][9][10][11]. Microstrip antenna is a smart solution for small, efficient, and economical wireless communication system.…”

Section: Antenna Designmentioning

confidence: 99%

Microstrip Antenna Design for Femtocell Coverage Optimization

Ahmed

Islam

Azim

et al. 2014

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

A mircostrip antenna is designed for multielement antenna coverage optimization in femtocell network. Interference is the foremost concern for the cellular operator in vast commercial deployments of femtocell. Many techniques in physical, data link and network-layer are analysed and developed to settle down the interference issues. A multielement technique with self-configuration features is analyzed here for coverage optimization of femtocell. It also focuses on the execution of microstrip antenna for multielement configuration. The antenna is designed for LTE Band 7 by using standard FR4 dielectric substrate. The performance of the proposed antenna in the femtocell application is discussed along with results.

show abstract

“…An adaptively configured FFR pattern with three sectors to cover outer region was presented in [3, 17]. The impacts of access methods and directional antenna on link reliability and capacity for OFDMA‐based femtocell systems were analysed in [18]. In [19], it was shown that using directional antenna and time hopping code division multiple access allows about seven times higher femtocell density than spectrum splitting techniques with omnidirectional antennas.…”

Section: Introductionmentioning

confidence: 99%