Patent ID: 9497053
Filing Date: 2016-11-15
CPC Classification: H04B,H04J,H04L

Claim Text:
1. A central access network unit comprising: a processor configured to: a transmitter coupled to the processor and configured to transmit the messages to the plurality of downstream network units via a network, wherein the messages instruct at least one of the plurality of downstream network units to transmit a modulated pre-determined sequence at the pilot subcarriers corresponding to the upstream training block assigned to the at least one downstream network unit, wherein the message comprises: a Symbol In Frame parameter that specifies a probing symbol within a probing frame, wherein the Symbol In Frame parameter is a number of symbols offset from a beginning of the probing frame; a starting subcarrier parameter that indicates a starting subcarrier to be used by a probing pattern; a stagger (St) parameter that indicates whether a staggered pattern is to be employed for the pilot subcarriers; and a subcarrier parameter that is number of subcarriers to be skipped between successive pilots in the probing pattern, wherein when the staggered pattern is to be employed, the subcarrier skipping parameter is associated with the number of symbols for which the probing pattern applies.