公开(公告)号：US20140198772A1

公开(公告)日：2014-07-17

申请号：US14156730

申请日：2014-01-16

申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

发明人： Robert Baldemair ,  Johan Bergman ,  Konstantinos Dimou ,  Pál Frenger

IPC分类号： H04B1/7073 ,  H04W56/00

CPC分类号： H04B1/7073 ,  H04L5/0048 ,  H04L27/2655 ,  H04L27/2692 ,  H04W56/00 ,  H04W56/001 ,  H04W56/0015

摘要： Systems and methods related to a synchronization signal particularly well suited for wireless devices in an extended coverage area of a cell of a cellular communications network are disclosed. In one embodiment, a base station transmits a synchronization signal including multiple repetitions of a basic synchronization block during a coherence time of a downlink channel over which the synchronization signal is transmitted. The multiple repetitions of the basic synchronization block during the coherence time enable coherent combining during detection of the synchronization signal at wireless devices located in the cellular communications network. This coherent combining enables, for example, wireless devices located in an extended coverage area of a cell served by the base station to synchronize to the cell using a shorter synchronization signal than that which would be required if only non-coherent combining were used.

摘要翻译： 公开了与特别适用于蜂窝通信网络的小区的扩展覆盖区域中的无线设备的同步信号相关的系统和方法。 在一个实施例中，基站在发送同步信号的下行链路信道的相干时间期间发送包括基本同步块的多个重复的同步信号。 在相干时间期间基本同步块的多重重复使得能够在位于蜂窝通信网络中的无线设备的同步信号检测期间进行相干组合。 该相干组合使得例如位于由基站服务的小区的扩展覆盖区域中的无线设备使用比仅使用非相干组合所需的更短的同步信号与小区同步。