标题: | 异质网络中的一个新的换手必要性估计方法 A new handover necessity estimation approach in heterogeneous networks |
作者: | 高旻颂 Gorde, Maxence 黄经尧 Huang,Ching-Yao 电机资讯国际学程 |
关键字: | 异质网路;资料市场;宽频接取;换手必要性评估;Heterogeneous networks;Data market;Broadband access;Handover protocols |
公开日期: | 2013 |
摘要: | Heterogeneous networks (HetNets) are bound to become the leading network design structure for the coming years, since the demand for mobile broadband access started to explode a few years ago, and will continue to do so within the next few years. In addition, the way users consume those mobile services has drastically changed. As a result, the existing outdoor networks that rely on macro cells might not be sufficient to deal with all the traffic demand, especially in dense urban areas. In response to these new market needs, heterogeneous network appear to be a clever deployment strategy. They consist in using Radio Access Technologies (RATs) and Wi-Fi in the same network structure, in order to meet quality, flexibility and precision requirements. However, HetNets generate numerous radio transmission signals at the same time. This disparity creates issues regarding the handovering process of a mobile device among cells that do not share the same characteristics. Numerous handover protocols have been implemented in order to make the device be always connected to the cell that is currently providing the best Quality of Service (QoS). Instead, we propose in this thesis to study handover necessity estimation (HNE) protocols, which means being able of measuring the need for a handover by evaluating network parameters in real time. The algorithms we performed for HNE need to use the time the mobile device has been spending within the candidate network coverage. Our contribution has been to use an estimation of this time, which may lead to numerous advantages. Simulations have been made to quantify the performance of this solution and see their potential impacts and deployment potential. 由于在过去几年间,移动宽频接取的需求猛增,异质网路已被视为未来数年的领导网路设计结构。用户使用移动服务的方式发生了巨大变化,在人口密集的城市地区,现有的室外网络可能不足以处理所有的流量需求。对应这些新的市场需求,异质网路似乎是一个聪明的部署策略,尤其是在人口密集的城市地区。它们包括在同一个网路结构中,使用不同的无线接入技术和无线区域网路,并要满足品质,弹性和精确度的要求。 然而,异质网路中,在同一时间有众多的无线电发送信号。此特性导出了一个议题,即行动装置在不同特性的蜂巢之间进行换手。许多换手协定已实现,使行动装置始终连接到目前提供最好的服务质量的蜂巢。 反之,在这篇论文中,我们提出研究换手的必要性评估的协议,这意味着能够藉由实时量测网路参数,来评估换手的必要性。 我们的换手必要性评估演算法,需要知道行动装置已滞留在候选网路覆盖范围内时间。我们的贡献是对于滞留时间的估计,这可能会导致许多优点。透过模拟,我们已量化这个解决方案的性能,了解其潜在的影响或潜在部署。 |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070160806 http://hdl.handle.net/11536/73862 |
显示于类别: | Thesis |
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