GRADUATED SINGLE FREQUENCY NETWORK,申请号US20080197942-传众专利搜索

GRADUATED SINGLE FREQUENCY NETWORK

申请公布号：US2009291700(A1)

申请号：US20080197942

申请日期：2008.08.25

申请公布日期：2009.11.26

申请人：

NORTEL NETWORKS LIMITED

发明人：CALLARD AARON;MA JIANGLEI;VRZIC SOPHIE

分类号：H04B7/00

主分类号：H04B7/00

摘要：The signals from adjacent transmitters reinforce one another. As a result of this over-the-air combining, signal quality is improved in the network and especially at or near cell boundaries. The present invention provides a graduated single frequency network (GSFN) wherein transmitters in cells throughout a geographic area cooperate to broadcast data to user terminals throughout the geographic area, and adjacent transmitters transmit signals that substantially reinforce one another. When transmitting the data, transmitters in certain adjacent cells throughout the geographic area may employ slightly different transmit parameters to provide slightly different transmission signals. The transmission signals used to transmit the data may be varied in a graduated fashion throughout the geographic area, wherein even when there is a difference in the transmission signals of transmitters in adjacent cells, the transmission signals reinforce one another despite being different.