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CHANNEL STATE INFORMATION FOR ADAPTIVELY CONFIGURED TDD COMMUNICATION SYSTEMS

  • US 20140269460A1
  • Filed: 03/07/2014
  • Published: 09/18/2014
  • Est. Priority Date: 03/13/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • transmitting, by a base station to a User Equipment (UE) for communication using Time Division Duplexing (TDD)a System Information Block (SIB) indicating a first 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 Physical DL Control CHannel (PDCCH) conveying a DL Control Information (DCI) format indicating an adaptation of the first TDD UL-DL configuration to a second TDD UL-DL configuration;

    configuration information for resources of a non-zero power Channel State Information Reference Signal (CSI-RS), for resources of a first Channel State Information Interference Measurement (CSI-IM), and for resources of a second CSI-IM wherein the non-zero power CSI-RS resources, the first CSI-IM resources, and the second CSI-IM resources are respectively in a subframe that is a DL subframe, a DL subframe, and an UL subframe in the first TDD UL-DL configuration;

    receiving, by the UEthe SIB indicating the first TDD UL-DL configuration;

    the DCI format indicating the second TDD UL-DL configuration;

    the configuration information; and

    measuring, by the UE, a first quantity based on signaling received in the non-zero power CSI-RS resources and on the first CSI-IM resources and a second quantity based on signaling received in the non-zero power CSI-RS resources and on the second CSI-IM resources when the UL subframe is a DL subframe in the second TDD UL-DL configuration.

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