C114门户论坛百科APPEN| 举报 切换到宽版

亚星游戏官网

 找回密码
 注册

只需一步,快速开始

短信验证,便捷登录

搜索

军衔等级:

亚星游戏官网-yaxin222  上等兵

注册:2009-11-30
发表于 2012-4-29 11:06:38 |显示全部楼层
书上有这么一段话:

A third motivation for carrier aggregation is support of heterogeneous networks. A
heterogeneous network deployment typically consists of a layer of high-power macrocellsand a layer of low-power small cells (e.g. picocells, Closed Subscriber Group (CSG)
femtocells or relay nodes – see Chapters 24 and 30) with at least one carrier being used
by both layers. In such a deployment, transmissions from one cell can interfere strongly
with the control channels of another
, thus impeding scheduling and signalling. Rather than
simply using separate carriers for the two layers, which would result in inefficient spectrum
usage, carrier aggregation enables multiple carriers to be used for a given layer, while
interference can be avoided by means of cross-carrier scheduling. Cross-carrier scheduling
allows the Physical Downlink Control Channel (PDCCH) on the CC of one serving cell to
schedule transmission resources on a CC of another serving cell, as explained in detail in
Section 28.3.1.

想咨询一下,为什么在宏基站+CSG的这种场景下,下行控制信道之间的干扰会比较大呢?我觉得既然
宏基站和CSG小区在不同的频点上,干扰应该比较小才是啊·~

求解答~~~

举报本楼

您需要登录后才可以回帖 登录 | 注册 |

手机版|C114 ( 沪ICP备12002291号-1 )|联系大家 |网站地图  

GMT+8, 2024-11-29 22:28 , Processed in 0.120293 second(s), 15 queries , Gzip On.

Copyright © 1999-2023 C114 All Rights Reserved

Discuz Licensed

回顶部
XML 地图 | Sitemap 地图