TRANSMISSION OF SOUNDING REFERENCE SIGNALS FOR ADAPTIVELY CONFIGURED TDD COMMUNICATION SYSTEMS

摘要

Methods and apparatus of a base station or a User Equipment (UE) in communication with each other are provided. The UE is configured by the base station for operation with an adapted Time Division Duplex (TDD) UpLink-DownLink (UL-DL) configuration. A process enabling transmission of a Sounding Reference Signal (SRS) from the UE to the base station and a process for the base station to determine parameters for a DL transmission to the UE are provided.

主权项

1. A method comprising:
transmitting, by a base station to a User Equipment (UE) signaling indicating a first Time Division Duplexing (TDD) UpLink-DownLink (UL-DL) configuration, wherein a TDD UL-DL configuration is defined over a time period of ten SubFrames (SFs) that comprise DL SFs where a communication direction is from the base station to the UE, UL SFs where a communication direction is from the UE to the base station, and special SFs where a communication direction can be both from the base station to the UE and from the UE to the base station, and wherein each SF of the ten SFs has a unique time domain index;
a control channel conveying a DL Control Information (DCI) format indicating a second TDD UL-DL configuration; andconfiguration information for the UE to periodically transmit a first Sounding Reference Signal (SRS) in a first UL SF of the first TDD UL-DL configuration using a first set of SRS transmission parameters, wherein in response to receiving the signaling indicating the first TDD UL-DL configuration, the DCI format indicating the second TDD UL-DL configuration, and the configuration information, the UE transmits the first SRS when the first UL SF is an UL SF in the second TDD UL-DL configuration and suspending transmission by the UE of the first SRS when the first UL SF is a DL SF in the second TDD UL-DL configuration.