Performance of a Reversible Hierarchical Cellular System

被引:4
作者
Beraldi R. [1 ,2 ,3 ]
Marano S. [1 ,2 ,4 ,5 ,6 ,7 ]
Mastroianni C. [1 ,2 ]
机构
[1] D.E.I.S., Università della Calabria
[2] CEFRIEL Centre, Milan
[3] ITT Laboratory, Leeds
[4] D.E.I.S. Department, University of Calabria
关键词
Cellular systems; Hierarchical network;
D O I
10.1023/A:1018881605596
中图分类号
学科分类号
摘要
In order to provide mobile worldwide communication services, cellular systems can be based on a multilayered, multisized cells architecture characterized by the use of different technologies. Satellites can cover lightly populated areas, as well as those areas where other means cannot be used (like the sea); fixed base stations, with different transmission powers and thus different cell sizes, can cover relatively highly populated areas. As a result, a given area could simultaneously be served by more than one Base Station, and the structure of such a system must be carefully designed. A Hierarchical Architecture (HA) scheme is a possible solution. HA is based on a multilevel cell configuration: microcells (or even indoor picocells) cover more densely populated areas and are given the majority of the traffic load as they are able to operate with very high capacity, while overlaying macrocells (or satellitar cells) provide a group of overflow channels. Occasionally, when microcells are not able to satisfy channel requests, the overflow channels are consumed. HA schemes are divided in two categories: Reversible Hierarchical (RH) and Non Reversible (NRH). The difference is given by the handover directions between cells allowed. In a RH handover, attempts between macrocells and microcells occur in both directions. This paper compares RH and NRH schemes by means of an analytical model based on birth-death processes. The main performance indexes and the control overhead are shown.
引用
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页码:43 / 54
页数:11
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