Patent ID: 9565696
Date: 2017-02-07
CPC Classifications: H04L,H04W

Claim:
1. A method implemented by a base station in a communications network that semi-statically configures a first plurality of uplink symbols for periodic sounding reference signal, SRS, transmission and a second plurality of uplink symbols, distinct from the first plurality of uplink symbols, for aperiodic SRS transmission, the method comprising: broadcasting a cell-specific instruction to a plurality of mobile terminals in a cell served by the base station, the cell-specific instruction indicating that an uplink symbol has been semi-statically configured for aperiodic SRS transmission over multiple subsequent subframes; dynamically determining that a first mobile terminal of the plurality of mobile terminals is to use the uplink symbol for SRS transmission in a given one of the multiple subsequent subframes at least partly based on whether or not the uplink symbol is to be used for data transmission; and in response to the dynamically determining, signaling a first terminal-specific instruction that is distinct from the cell-specific instruction to the first mobile terminal, the first terminal-specific instruction indicating that the first mobile terminal is to use the uplink symbol for SRS transmission in the given subframe.