Patent ID: 8717969
Filing Date: 2014-05-06
Classification: H04L,H04W

Abstract:
1. A method for uplink power control in OFDMA (Orthogonal Frequency Division Multiple Access) TDD (Time Division Duplex) system, the method comprising: measuring a RSSI (Received Signal Strength Indicator) of downlink signals; updating a RSSI (Received Signal Strength Indicator) average by calculating a weighted sum of the measured RSSIs and a previous RSSI average; and carrying out an uplink power control based on the updated RSSI average, wherein weights used for calculating the weighted sum are determined according to at least one of a channel variation rate and a link symmetry, wherein the RSSI average is updated by using the following equation: wherein RSSI wherein α is set to a first value when the channel variation rate is lower than a predetermined value, α is set to a second value when the channel variation rate is not lower than the predetermined value, and the first value is higher than the second value.