公开(公告)号：US06829307B1

公开(公告)日：2004-12-07

申请号：US09513716

申请日：2000-02-24

申请人： Louise Min Chuin Hoo ,  Atul Arvind Salvekar ,  Carlos Aldana ,  John M. Cioffi ,  Peter Chow ,  James Carlo

发明人： Louise Min Chuin Hoo ,  Atul Arvind Salvekar ,  Carlos Aldana ,  John M. Cioffi ,  Peter Chow ,  James Carlo

IPC分类号： H04K110

CPC分类号： H04L5/006 ,  H04L1/0025 ,  H04L1/004 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/0053 ,  H04L5/0085 ,  H04L5/0096

摘要： Methods and devices for adaptively changing a parameter (such as sub-carrier bit allocation and/or gain) in a multi-carrier communication signal are described. In a method aspect, a unit that determines a need for a change sends an express change request to a second unit. The change request identifies one or more specific sub-carrier carrier to be altered and a desired value for the parameter to be changed for each identified sub-carrier. The requesting unit then monitors the communication signal it receives to determine whether the requested change has been implemented. The determination of whether the requested change has been implemented is based at least in part upon an analysis of a portion of the received communication signal that was intended to be changed. In another aspect of the invention, the change request command includes a header, a control field, at least one sub-carrier identifier, at least one desired parameter value indicator, and an error field. The header identifies the command as a change request command. The control field includes a tone count that indicates the number of tones to be altered. Each sub-carrier identifier identifies a specific sub-carrier to be altered and each desired parameter value indicator identifies a desired parameter value for its associated sub-carrier. The error field permits the unit receiving the change request to detect whether there is an error in its interpretation of the change request command.

摘要翻译： 描述了用于在多载波通信信号中自适应地改变参数（例如子载波比特分配和/或增益）的方法和装置。 在方法方面，确定需要改变的单元向第二单元发送快速更改请求。 改变请求识别要改变的一个或多个特定副载波载波和要为每个识别的子载波改变的参数的期望值。 然后，请求单元监视其接收到的通信信号，以确定所请求的改变是否已被实现。 至少部分地基于对旨在改变的所接收的通信信号的一部分的分析来确定所请求的改变是否被实现。 在本发明的另一方面，改变请求命令包括报头，控制字段，至少一个子载波标识符，至少一个期望参数值指示符和错误字段。 标题将该命令标识为更改请求命令。 控制字段包括指示要改变的音调数量的音调计数。 每个子载波标识符识别要改变的特定子载波，并且每个期望的参数值指示符识别其相关联的子载波的期望参数值。 错误字段允许接收改变请求的单元检测其对改变请求命令的解释是否存在错误。