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首页> 外文期刊>International Journal of Advances in Engineering Sciences and Applied Mathematics >Femtocell architectures with spectrum sharing for cellular radio networks
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Femtocell architectures with spectrum sharing for cellular radio networks

机译：具有蜂窝无线网络频谱共享的毫微微小区架构

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摘要

Femtocells are an emerging technology aimed at providing gains to both network operators and end-users. These gains come at a cost of increased interference, specifically the cross network interference between the macrocell and femtocell networks. This interference is one of the main performance limiting factors in allowing an underlaid femtocell network to share the spectrum with the cellular network. To manage this interference, we first propose a femtocell architecture that orthogonally partitions the network bandwidth between the macrocell and femtocell networks. This scheme eliminates the cross network interference thus giving the femtocells more freedom over their use of the spectrum. Specifically, no interference constraint is imposed by the cellular network allowing femto users to transmit at a constant power on randomly selected channels. Although simple, this scheme is enough to give gains up to 200 ％ in sum rate. We then propose a second architecture where both networks share the bandwidth simultaneously. A femtocell power control scheme that relies on minimal coordination with the macrocell base station is used in conjunction with an interference sensing channel assignment mechanism. These two schemes together yield sum rate gains up to 200 ％. We then develop a technique for macro users to join a nearby femtocell and share a common channel with a femtocell user through the use of successive interference cancellation. By adding this mechanism to the power control and channel assignment schemes, we show sum rate gains over 300 ％ and up to 90 ％ power savings for macrocell users.
机译：毫微微小区是一种新兴技术，旨在为网络运营商和最终用户提供收益。这些增益是以增加干扰为代价的，特别是宏小区和毫微微小区网络之间的跨网干扰。这种干扰是允许底层的毫微微小区网络与蜂窝网络共享频谱的主要性能限制因素之一。为了管理这种干扰，我们首先提出一种毫微微小区架构，该架构在宏小区和毫微微小区网络之间正交划分网络带宽。该方案消除了跨网干扰，从而使毫微微小区在使用频谱方面拥有更大的自由度。具体地，蜂窝网络没有​​施加干扰约束，从而允许毫微微用户以恒定功率在随机选择的信道上进行发送。尽管很简单，但该方案足以使总和率高达200％。然后，我们提出第二种架构，其中两个网络同时共享带宽。依赖于与宏小区基站的最小协调的毫微微小区功率控制方案与干扰感测信道分配机制结合使用。这两个方案合计可将总和率增益提高200％。然后，我们开发一种技术，让宏用户加入附近的毫微微小区，并通过使用连续干扰消除功能与毫微微小区用户共享一个公共信道。通过将这种机制添加到功率控制和信道分配方案中，我们为宏蜂窝用户显示了总速率增益超过300％并节省多达90％的功率。

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