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Advantages And Disadvantages Of LTE Networks

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These technologies bring the network closer to mobile users and improve spectral efficiency (SE) per unit arena (i.e capacity). Due to lower power and smaller physical size, pico/ femto/ relay cells can also be deployed to eliminate coverage holes and relay cells can be used in backhaul, where wire line backhaul is unavailable or not economical [150]-[152]. The heterogeneous deployment of LTE networks comprising of conventional Macro cell base stations overlaid with LPNs. The often random and unplanned location of these access points can cause severe interference problems especially for cell edge users. This problem was typically addressed by coordinating base-station transmissions to minimize interference. Figure 2.10 shows a heterogeneous …show more content…

• Disadvantages: Despite the benefits that can be achieved by this technique, there are some challenges that need to be addressed, including management of the interfaces between heterogeneous environments and the dead zone problem. Towards this direction, 3GPP LTE standard has introduced Inter Cell Interference Coordination (ICIC) methods since Release 8 specifications. ICIC was developed to deal with interference issues at cell-edge and mitigates interference on traffic channels only in heterogeneous network. These limitations were bypassed with Release 10 specifications which introduced enhanced Inter Cell Interference Coordination (e-ICIC). Enhancements were brought to deal with interference issues in Heterogeneous Networks and mitigate interference on traffic and control channels. In such networks, two major scenarios for severe inter cell interference should be highlighted: macro-pico scenario with Cell Range-Extension (CRE) and macro-femto scenario with Closed-Subscriber-Group

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