Femto Cells

A Self-Organized Femtocell for IEEE 802.16e System Young Jin Sang, Hae Gwang Hwang and Kwang Soon Kim† School of electric and electronic Engineering, Yonsei University 134, Shinchong-dong, Seodaemun-gu, Seoul 120-749, Korea E-mail: {yjmich, hwang819, ks.kim}@yonsei.ac.kr † Corresponding Author victimize Femtocell is a clear base station with low motive which can be installed by users to get better information rate in the indoor(a) environment. The power control device of the femtocell BS is the some important issue in the femtocell implementation but in that respect still exist deadzones if macrocell users ar rigid very tight fitting to the femtocell. In this paper, we take aim proposed a bran-new frame organize for the IEEE 802.16e based femtocell. Selfinitialized segements excerpt and preamble allocation scheme be also proposed. using the proposed preamble structure and self-initialization scheme, macrocell users can encounter a macrocell BS even though t hey are located very conterminous to the femtocell. The simulation results show that macrocell users can dwell and communicate with the macrocell BS even though they are in the femtocell coverage. Additionally, it is shown that the proposed system provides the highest throughput of the macrocell and the femtocell intimate the femtocell coverage. I.

I NTRODUCTION Recent research shows that to a greater close than 50% of voice calls and more than 70% of data traf?c are generated indoors [1][2]. The users of cellular wireless system in the indoor environment have dif?culty in receiving high-speed ecclesiastic service due to low-quality signals from the outdoor base station. Femtocell h as been considered as a new technology to so! lve deadzone problem in the indoor environments. Femtocell is a low-power, short-range, low-cost elfin base station (BS) which is attached to a wired broadband system to serve the users in small areas such as home or of?ce. As femtocells are installed by customers in exiting profits, such as IEEE 802.16e, HSDPA, a two-tier network is created...If you want to get a full essay, regularize it on our website: OrderEssay.net

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