A novel CDMA-based fiber-optic microcellular system: FoMiCell/sup TM/

Cheong, Jong Min; Seo, Sang Hoon; Kim, J.S.; Koo, Hyunji; Park, H.S.; Choi, JunKyun; Park, S.

doi:10.1109/vetec.1999.778449

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…One approach to solve this problem is to concentrate radio equipment at the central base station with radio frequency (RF) signals being transmitted to microcells through broadband analog transmission over fiber, coax, or millimeter-wave radio. The use of broadband aspects of fiber optic technology for radio remoting has been studied and tested by Ichikawa et al [6] and Cheong et al [8]. Ichikawa et al [6] propose a microcell radio systems using a centralized control method with a spectrum delivery switch and subcarrier transmission over optical fiber for TDMA and FDMA.…”

Section: Introductionmentioning

confidence: 99%

“…Ichikawa et al [6] propose a microcell radio systems using a centralized control method with a spectrum delivery switch and subcarrier transmission over optical fiber for TDMA and FDMA. A fiber-optic micro-cellular CDMA system is proposed by Cheong et al [8]. The system possibly makes group simulcasting operation via remote antenna control using multi-drop bus type access network, since the hybrid fiber-radio access network is independent of the different channels and gives flexibility in evolution scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic sectorization of microcells for balanced traffic in CDMA: genetic algorithms approach

Lee

Kang

Park³

2002

IEEE Trans. Veh. Technol.

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With the increase of cellular users the traffic hot spots and unbalanced call distributions are common in wireless networks. As a solution to this problem, the CDMA techniques enable a base tranciever station to connect microcells with optical fibers and to control the channels by sectorizing the microcells. To solve the load balancing among microcells we dynamically sectorize the microcells depending on the time-varying traffic. The microcell sectorization problem is formulated as an integer linear programming which minimizes the blocked and handoff calls in the network. In the proposed sectorization proper, connected, and compact sectors are considered to keep the handoffs as small as possible, while satisfying the channel capacity at each sector. Three genetic algorithms (GAs) are proposed to solve the problem: standard GA, grouping GA and parallel GA. Computational results show that the proposed GAs are highly effective. All three GAs illustrate outstanding performance for small size problems. The parallel GA which is based on the operators used in grouping GA demonstrates excellent solution quality in a reasonable time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic sectorization of microcells for balanced traffic in CDMA: genetic algorithms approach

Lee

Kang

Park³

2002

IEEE Trans. Veh. Technol.

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A grouping genetic algorithm for the microcell sectorization problem

Brown

Vroblefski

2004

Engineering Applications of Artificial Intelligence

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PN offset planning for synchronous CDMA based fiber-optic microcellular systems

Jung

Hong²,

Cho³

et al.

VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026)

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PN offset planning methods for a multi-layer synchronous CDMA network composed of macrocells and fiber-optic microcells (fomicells) are developed. In these methods, planning of macrocells and that of fomicells are independently performed. For macrocells, an existing method, which is called the cluster reuse-based method, is used. For fomicells, it is observed that precompensation of optical delay is required at each base transceiver system (BTS) supporting fomicells. Two methods for fomicell planning are proposed. One is the cluster reuse-based method and the other is the graph coloring technique. Design examples indicate that the letter is more appropriate to fomicell environment and yields more efficient PN-offset planning than the former.

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A novel CDMA-based fiber-optic microcellular system: FoMiCell/sup TM/

Cited by 3 publications

References 4 publications

Dynamic sectorization of microcells for balanced traffic in CDMA: genetic algorithms approach

Dynamic sectorization of microcells for balanced traffic in CDMA: genetic algorithms approach

A grouping genetic algorithm for the microcell sectorization problem

PN offset planning for synchronous CDMA based fiber-optic microcellular systems

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