Method and apparatus for transmitting uplink sounding reference signal
AssigneeSamsung Electronics Co., Ltd.
InventorsZheng Zhao, Yingyang Li, Jingxing Fu
Life of this patent
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Abstract
Various embodiments of the present disclosure describe a terminal and a base station. Various embodiments of the present disclosure describe how to transmit the SRS on an FDD downlink carrier and effectively configure and transmit the FDD downlink carrier SRS, so that the FDD system has the channel reciprocity and is more suitable for a large-scale multi-antenna system. Various embodiments of the present disclosure describe an SRS transmission method and device when an uplink carrier of the FDD system can transmit an uplink signal and a downlink signal.
Claims16
A method for transmitting an uplink sounding reference signal (SRS) at a terminal, comprising:
- obtaining configuration and triggering information of the SRS from a base station;
- determining a carrier and a subframe to transmit the SRS based on the configuration and triggering information, wherein the carrier is determined as one of a frequency division duplex (FDD) downlink carrier and a flexible duplex uplink carrier;
- obtaining power control information and determining a power value based on the obtained power control information;
- and
- transmitting the SRS to the base station, through the determined carrier and subframe with the determined power value, for estimating channel information based on the SRS and configuring the channel information as downlink channel information on the determined one of the FDD downlink carrier and the flexible duplex uplink carrier,
- wherein determining the carrier comprises:
- determining the flexible duplex uplink carrier is an FDD uplink carrier;
- and
- determining the carrier from among the FDD downlink carrier and the FDD uplink carrier, as that which carries the configuration and triggering information, in response to the flexible duplex uplink carrier being the FDD uplink carrier.
A terminal device for transmitting an uplink sounding reference signal (SRS), the terminal comprising:
- a controller configured to obtain configuration and triggering information of the SRS from a base station, determine a carrier and a subframe to transmit the SRS based on the configuration and triggering information, obtain power control information and determine a power value based on the obtained power control information;
- wherein the carrier is determined as one of a frequency division duplex (FDD) downlink carrier and a flexible duplex uplink carrier;
- and
- a transceiver configured to transmit the SRS to the base station through the determined carrier and subframe with the determined power value, for estimating channel information based on the SRS and configuring the channel information as downlink channel information on the determined one of the FDD downlink carrier and the flexible duplex uplink carrier,
- wherein, when the flexible duplex uplink carrier is an FDD uplink carrier, the carrier is determined, by the controller, from among the FDD downlink carrier and the FDD uplink carrier, as that which carries the configuration and triggering information.
Dependencies are inferred from the claim text.