发明名称 |
Preamble sequence extension |
摘要 |
A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel. |
申请公布号 |
US8792567(B2) |
申请公布日期 |
2014.07.29 |
申请号 |
US201213526227 |
申请日期 |
2012.06.18 |
申请人 |
Texas Instruments Incorporated |
发明人 |
Dabak Anand G.;Pande Tarkesh;Kim Il Han;Vedantham Ramanuja;Vijayasankar Kumaran;Xu Gang |
分类号 |
H04B3/00 |
主分类号 |
H04B3/00 |
代理机构 |
|
代理人 |
Shaw Steven A.;Brady, III Wade James;Telecky, Jr. Frederick J. |
主权项 |
1. A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node, comprising:
determining at least one communication quality measure for said PLC channel; based on said communication quality measure, including at least one of a channel response of said PLC channel and a noise profile of said PLC channel, dynamically switching a preamble of a data frame between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) said reference symbol length,
wherein:
if said channel response is greater than or equal to (≧) a predetermined channel response threshold indicating a good response and said noise profile is less than or equal to (≦) a predetermined noise threshold indicating acceptable noise, said reference preamble is selected, andif at least one of said channel response is less than (<) said predetermined channel response threshold indicating a poor response and said noise profile is greater than (>) said predetermined noise threshold indicating unacceptable noise, said first extended preamble is selected having an extended number of said syncP symbols which provides X symbols greater than (>) said reference number of said syncP symbols; and transmitting said data frame on said PLC channel. |
地址 |
Dallas TX US |