公开(公告)号：US07302276B2

公开(公告)日：2007-11-27

申请号：US10926742

申请日：2004-08-26

申请人： Bo Bernhardsson ,  Jonas Ohlsson ,  Mikael Zirèn

发明人： Bo Bernhardsson ,  Jonas Ohlsson ,  Mikael Zirèn

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/246 ,  H04B17/327 ,  H04W52/14 ,  H04W52/228 ,  H04W52/242 ,  H04W52/245 ,  H04W52/50

摘要： Methods and apparatus are described for estimating a path-loss difference between uplink and downlink communications at a first node communicating with a second node in a communication system. A quantity of access request preambles transmitted by the first node to the second node before an acknowledgement from the second node of successful receipt of a preamble is received at the first node is determined. A difference between an uplink path-loss attributed to communications from the first node to the second node and a downlink path-loss attributed to communications to the first node from the second node is estimated based on the transmitted preamble quantity determination. Once the path-loss difference is estimated, the estimate can be used for many purposes, such as to determine a transmission power of the first node.

摘要翻译： 描述了用于估计在通信系统中与第二节点通信的第一节点处的上行链路和下行链路通信之间的路径损耗差异的方法和装置。 在第一节点处接收到来自第二节点的成功接收的确认之前由第一节点发送到第二节点的接入请求前导码的数量被确定。 基于所发送的前导码量确定，估计归因于从第一节点到第二节点的通信的上行链路路径损耗与归因于从第二节点到第一节点的通信的下行链路路径损耗之间的差异。 一旦路径损耗差被估计，该估计可用于许多目的，例如确定第一节点的发射功率。