A reversible hierarchical scheme for microcellular systems with overlaying macrocells
A reversible hierarchical scheme for microcellular systems with overlaying macrocells
复制标题
具有覆盖宏小区的微蜂窝系统的可逆分层方案
DOI：
10.1109/infcom.1996.497877
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
C. Mastroianni
中科院分区：
文献类型：
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作者：
R. Beraldi;S. Marano;C. Mastroianni
未来的蜂窝系统预计将使用多层，多尺寸的细胞，以覆盖非均匀的人口稠密地区。文献中的一个例子是由2级分级结构给出的，其中覆盖的宏小区提供一组溢出信道，当覆盖人口密集区域的微小区不能容纳新呼叫或从另一个微小区切换时使用。宏小区具有较高的层次位置，这意味着它可以从层次较低的微小区以及从其他宏小区接收切换请求。相反，由宏小区服务的呼叫不能切换到微小区。本文提出了一种可逆的分层方案，其特征在于存在从宏小区到微小区的切换尝试。该方案被设想为使得微小区被给予大部分业务负载，因为它们能够以非常高的容量操作，而具有较低信道利用率的宏小区能够更好地执行它们的支持任务。进行了分析研究表明，系统的性能可以得到改善，在网络控制开销增加相对较小的代价，当与经典的，即不可逆的分层方案相比。
Future cellular systems are expected to use multilayered, multisized cells to cover non-homogeneous populated areas. An example in literature is given by a 2 level hierarchical architecture in which an overlaying macrocell provides a group of overflow channels utilized when a microcell, which covers a densely populated area, is not able to accommodate a new call, or a handover from another microcell. The macrocell has the higher hierarchical position, meaning that it can receive handover requests from microcells, lower in the hierarchy, as well as from other macrocells. On the contrary, a call served by the macrocell cannot handover to a microcell. This paper proposes a reversible hierarchical scheme characterized by the presence of handover attempts from macrocells to microcells. The scheme is conceived so that the microcells are given the majority of the traffic load as they are able to operate with very high capacity, while the macrocells, having lower channel utilization, can better carry out their support task. An analytical study is carried out showing that the system performance can be improved, at the expense of relatively little increase of network control overhead, when compared with the classical, i.e. nonreversible hierarchical scheme.