Patent ID: 8031693
Filing Date: 2011-10-04
Classification: H04L,H04W

Abstract:
1. A method in a network access equipment of maintaining uplink synchronization comprising: defining, by the network access equipment, a burst period for sending a plurality of timing signals, wherein the burst period is defined within a timing advance (TA) adjustment period comprising a measurement period and a quiet period, wherein the burst period corresponds to the measurement period, and wherein the quiet period corresponds to a time during the TA adjustment period in which sending the timing signals is avoided; determining a number of timing signals required per burst period to maintain synchronization, the number being such that, relative to a prior TA adjustment period, a total number of timing signals within the TA adjustment period remains constant, and wherein the burst period is shorter than the prior TA adjustment period; determining an interval between ones of the plurality of timing signals in the burst period; and sending a timing signal instruction message containing the burst period and the interval.